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Update docs

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Rhys Weatherley 2015-05-02 10:17:44 +10:00
parent 0ad779856a
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337 changed files with 941 additions and 680 deletions

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@ -175,7 +175,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -175,7 +175,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -182,7 +182,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -415,7 +415,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -206,7 +206,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -125,7 +125,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -141,7 +141,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -330,7 +330,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -163,7 +163,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -322,7 +322,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -162,7 +162,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -557,7 +557,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -118,70 +118,77 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;</div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="comment">// Define exactly one of these to 1 to set the size of the basic limb type.</span></div> <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="comment">// Define exactly one of these to 1 to set the size of the basic limb type.</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="comment">// 16-bit limbs seem to give the best performance on 8-bit AVR micros.</span></div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="comment">// 16-bit limbs seem to give the best performance on 8-bit AVR micros.</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#define BIGNUMBER_LIMB_8BIT 0</span></div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#if defined(__AVR__)</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define BIGNUMBER_LIMB_16BIT 1</span></div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define BIGNUMBER_LIMB_8BIT 0</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define BIGNUMBER_LIMB_32BIT 0</span></div> <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define BIGNUMBER_LIMB_16BIT 1</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor"></span></div> <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define BIGNUMBER_LIMB_32BIT 0</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="comment">// Define the limb types to use on this platform.</span></div> <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="preprocessor">#if BIGNUMBER_LIMB_8BIT</span></div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="preprocessor"></span><span class="comment">// On all other platforms, assume 32-bit is best (e.g. ARM).</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="preprocessor"></span><span class="keyword">typedef</span> uint8_t limb_t;</div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="preprocessor">#define BIGNUMBER_LIMB_8BIT 0</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="keyword">typedef</span> int8_t slimb_t;</div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define BIGNUMBER_LIMB_16BIT 0</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="keyword">typedef</span> uint16_t dlimb_t;</div> <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define BIGNUMBER_LIMB_32BIT 1</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;<span class="preprocessor">#elif BIGNUMBER_LIMB_16BIT</span></div> <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="preprocessor"></span><span class="keyword">typedef</span> uint16_t limb_t;</div> <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;<span class="keyword">typedef</span> int16_t slimb_t;</div> <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;<span class="comment">// Define the limb types to use on this platform.</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;<span class="keyword">typedef</span> uint32_t dlimb_t;</div> <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;<span class="preprocessor">#if BIGNUMBER_LIMB_8BIT</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;<span class="preprocessor">#elif BIGNUMBER_LIMB_32BIT</span></div> <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;<span class="preprocessor"></span><span class="keyword">typedef</span> uint8_t limb_t;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="preprocessor"></span><span class="keyword">typedef</span> uint32_t limb_t;</div> <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="keyword">typedef</span> int8_t slimb_t;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;<span class="keyword">typedef</span> int32_t slimb_t;</div> <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;<span class="keyword">typedef</span> uint16_t dlimb_t;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;<span class="keyword">typedef</span> uint64_t dlimb_t;</div> <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;<span class="preprocessor">#elif BIGNUMBER_LIMB_16BIT</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="preprocessor">#else</span></div> <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="preprocessor"></span><span class="keyword">typedef</span> uint16_t limb_t;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#error &quot;limb_t must be 8, 16, or 32 bits in size&quot;</span></div> <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="keyword">typedef</span> int16_t slimb_t;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#endif</span></div> <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;<span class="keyword">typedef</span> uint32_t dlimb_t;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;<span class="preprocessor"></span></div> <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;<span class="preprocessor">#elif BIGNUMBER_LIMB_32BIT</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html"> 52</a></span>&#160;<span class="keyword">class </span><a class="code" href="classBigNumberUtil.html">BigNumberUtil</a></div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="preprocessor"></span><span class="keyword">typedef</span> uint32_t limb_t;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;{</div> <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;<span class="keyword">typedef</span> int32_t slimb_t;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;<span class="keyword">public</span>:</div> <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;<span class="keyword">typedef</span> uint64_t dlimb_t;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a25041f898c417c8dd63f30536287ed79">unpackLE</a>(limb_t *limbs, <span class="keywordtype">size_t</span> count,</div> <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keyword">const</span> uint8_t *bytes, <span class="keywordtype">size_t</span> len);</div> <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#error &quot;limb_t must be 8, 16, or 32 bits in size&quot;</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a63f9d7884eb36227d39e1b95e219d865">unpackBE</a>(limb_t *limbs, <span class="keywordtype">size_t</span> count,</div> <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keyword">const</span> uint8_t *bytes, <span class="keywordtype">size_t</span> len);</div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a989cd5f389ac5adc798d8767383e2810">packLE</a>(uint8_t *bytes, <span class="keywordtype">size_t</span> len,</div> <div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html"> 59</a></span>&#160;<span class="keyword">class </span><a class="code" href="classBigNumberUtil.html">BigNumberUtil</a></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keyword">const</span> limb_t *limbs, <span class="keywordtype">size_t</span> count);</div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;{</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#af49dd38173ea0310776d283aabea2ba0">packBE</a>(uint8_t *bytes, <span class="keywordtype">size_t</span> len,</div> <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keyword">const</span> limb_t *limbs, <span class="keywordtype">size_t</span> count);</div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a25041f898c417c8dd63f30536287ed79">unpackLE</a>(limb_t *limbs, <span class="keywordtype">size_t</span> count,</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;</div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keyword">const</span> uint8_t *bytes, <span class="keywordtype">size_t</span> len);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keyword">static</span> limb_t <a class="code" href="classBigNumberUtil.html#aa6904b2727af6b767fe041b1b7f27414">add</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a63f9d7884eb36227d39e1b95e219d865">unpackBE</a>(limb_t *limbs, <span class="keywordtype">size_t</span> count,</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keyword">const</span> uint8_t *bytes, <span class="keywordtype">size_t</span> len);</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">static</span> limb_t <a class="code" href="classBigNumberUtil.html#a6618e03bfcb3086961df508b40cc1e67">sub</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a989cd5f389ac5adc798d8767383e2810">packLE</a>(uint8_t *bytes, <span class="keywordtype">size_t</span> len,</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div> <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keyword">const</span> limb_t *limbs, <span class="keywordtype">size_t</span> count);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a1c2c5484f2bf440ae292fd3dfd2d594f">mul</a>(limb_t *result, <span class="keyword">const</span> limb_t *x, <span class="keywordtype">size_t</span> xcount,</div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#af49dd38173ea0310776d283aabea2ba0">packBE</a>(uint8_t *bytes, <span class="keywordtype">size_t</span> len,</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> ycount);</div> <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <span class="keyword">const</span> limb_t *limbs, <span class="keywordtype">size_t</span> count);</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a5af5f50c91594183da4e079d76702d34">reduceQuick</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div> <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="keyword">static</span> limb_t <a class="code" href="classBigNumberUtil.html#aa6904b2727af6b767fe041b1b7f27414">add</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;</div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="keyword">static</span> limb_t <a class="code" href="classBigNumberUtil.html#ab9a9f532fcfc182433adac44d8e4ee20">add_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div> <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="keyword">static</span> limb_t <a class="code" href="classBigNumberUtil.html#a6618e03bfcb3086961df508b40cc1e67">sub</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div> <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keyword">static</span> limb_t <a class="code" href="classBigNumberUtil.html#af0fa1527647af42b65eda6b0aab982b3">sub_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div> <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a1c2c5484f2bf440ae292fd3dfd2d594f">mul</a>(limb_t *result, <span class="keyword">const</span> limb_t *x, <span class="keywordtype">size_t</span> xcount,</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div> <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> ycount);</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#aacdee1806a239eb9e58753ef1ddb964a">mul_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x, <span class="keywordtype">size_t</span> xcount,</div> <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a5af5f50c91594183da4e079d76702d34">reduceQuick</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> ycount);</div> <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a00c9cde0b626788a60552a6bc9ce058b">reduceQuick_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div> <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div> <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keyword">static</span> limb_t <a class="code" href="classBigNumberUtil.html#ab9a9f532fcfc182433adac44d8e4ee20">add_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;</div> <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;<span class="keyword">private</span>:</div> <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="keyword">static</span> limb_t <a class="code" href="classBigNumberUtil.html#af0fa1527647af42b65eda6b0aab982b3">sub_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="comment">// Constructor and destructor are private - cannot instantiate this class.</span></div> <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <a class="code" href="classBigNumberUtil.html">BigNumberUtil</a>() {}</div> <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#aacdee1806a239eb9e58753ef1ddb964a">mul_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x, <span class="keywordtype">size_t</span> xcount,</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; ~<a class="code" href="classBigNumberUtil.html">BigNumberUtil</a>() {}</div> <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> ycount);</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;};</div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a00c9cde0b626788a60552a6bc9ce058b">reduceQuick_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;</div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size);</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;<span class="preprocessor">#endif</span></div> <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="comment">// Constructor and destructor are private - cannot instantiate this class.</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <a class="code" href="classBigNumberUtil.html">BigNumberUtil</a>() {}</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; ~<a class="code" href="classBigNumberUtil.html">BigNumberUtil</a>() {}</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;};</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="classBigNumberUtil_html_a00c9cde0b626788a60552a6bc9ce058b"><div class="ttname"><a href="classBigNumberUtil.html#a00c9cde0b626788a60552a6bc9ce058b">BigNumberUtil::reduceQuick_P</a></div><div class="ttdeci">static void reduceQuick_P(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Reduces x modulo y using subtraction where y is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00620">BigNumberUtil.cpp:620</a></div></div> <div class="ttc" id="classBigNumberUtil_html_a00c9cde0b626788a60552a6bc9ce058b"><div class="ttname"><a href="classBigNumberUtil.html#a00c9cde0b626788a60552a6bc9ce058b">BigNumberUtil::reduceQuick_P</a></div><div class="ttdeci">static void reduceQuick_P(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Reduces x modulo y using subtraction where y is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00620">BigNumberUtil.cpp:620</a></div></div>
<div class="ttc" id="classBigNumberUtil_html_aa6904b2727af6b767fe041b1b7f27414"><div class="ttname"><a href="classBigNumberUtil.html#aa6904b2727af6b767fe041b1b7f27414">BigNumberUtil::add</a></div><div class="ttdeci">static limb_t add(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Adds two big numbers. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00381">BigNumberUtil.cpp:381</a></div></div> <div class="ttc" id="classBigNumberUtil_html_aa6904b2727af6b767fe041b1b7f27414"><div class="ttname"><a href="classBigNumberUtil.html#aa6904b2727af6b767fe041b1b7f27414">BigNumberUtil::add</a></div><div class="ttdeci">static limb_t add(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Adds two big numbers. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00381">BigNumberUtil.cpp:381</a></div></div>
<div class="ttc" id="classBigNumberUtil_html_af0fa1527647af42b65eda6b0aab982b3"><div class="ttname"><a href="classBigNumberUtil.html#af0fa1527647af42b65eda6b0aab982b3">BigNumberUtil::sub_P</a></div><div class="ttdeci">static limb_t sub_P(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Subtracts one big number from another where one is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00541">BigNumberUtil.cpp:541</a></div></div> <div class="ttc" id="classBigNumberUtil_html_af0fa1527647af42b65eda6b0aab982b3"><div class="ttname"><a href="classBigNumberUtil.html#af0fa1527647af42b65eda6b0aab982b3">BigNumberUtil::sub_P</a></div><div class="ttdeci">static limb_t sub_P(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Subtracts one big number from another where one is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00541">BigNumberUtil.cpp:541</a></div></div>
<div class="ttc" id="classBigNumberUtil_html_a5af5f50c91594183da4e079d76702d34"><div class="ttname"><a href="classBigNumberUtil.html#a5af5f50c91594183da4e079d76702d34">BigNumberUtil::reduceQuick</a></div><div class="ttdeci">static void reduceQuick(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Reduces x modulo y using subtraction. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00484">BigNumberUtil.cpp:484</a></div></div> <div class="ttc" id="classBigNumberUtil_html_a5af5f50c91594183da4e079d76702d34"><div class="ttname"><a href="classBigNumberUtil.html#a5af5f50c91594183da4e079d76702d34">BigNumberUtil::reduceQuick</a></div><div class="ttdeci">static void reduceQuick(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Reduces x modulo y using subtraction. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00484">BigNumberUtil.cpp:484</a></div></div>
<div class="ttc" id="classBigNumberUtil_html_a6618e03bfcb3086961df508b40cc1e67"><div class="ttname"><a href="classBigNumberUtil.html#a6618e03bfcb3086961df508b40cc1e67">BigNumberUtil::sub</a></div><div class="ttdeci">static limb_t sub(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Subtracts one big number from another. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00408">BigNumberUtil.cpp:408</a></div></div> <div class="ttc" id="classBigNumberUtil_html_a6618e03bfcb3086961df508b40cc1e67"><div class="ttname"><a href="classBigNumberUtil.html#a6618e03bfcb3086961df508b40cc1e67">BigNumberUtil::sub</a></div><div class="ttdeci">static limb_t sub(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Subtracts one big number from another. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00408">BigNumberUtil.cpp:408</a></div></div>
<div class="ttc" id="classBigNumberUtil_html"><div class="ttname"><a href="classBigNumberUtil.html">BigNumberUtil</a></div><div class="ttdoc">Utilities to assist with implementing big number arithmetic. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8h_source.html#l00052">BigNumberUtil.h:52</a></div></div> <div class="ttc" id="classBigNumberUtil_html"><div class="ttname"><a href="classBigNumberUtil.html">BigNumberUtil</a></div><div class="ttdoc">Utilities to assist with implementing big number arithmetic. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8h_source.html#l00059">BigNumberUtil.h:59</a></div></div>
<div class="ttc" id="classBigNumberUtil_html_aacdee1806a239eb9e58753ef1ddb964a"><div class="ttname"><a href="classBigNumberUtil.html#aacdee1806a239eb9e58753ef1ddb964a">BigNumberUtil::mul_P</a></div><div class="ttdeci">static void mul_P(limb_t *result, const limb_t *x, size_t xcount, const limb_t *y, size_t ycount)</div><div class="ttdoc">Multiplies two big numbers where one is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00566">BigNumberUtil.cpp:566</a></div></div> <div class="ttc" id="classBigNumberUtil_html_aacdee1806a239eb9e58753ef1ddb964a"><div class="ttname"><a href="classBigNumberUtil.html#aacdee1806a239eb9e58753ef1ddb964a">BigNumberUtil::mul_P</a></div><div class="ttdeci">static void mul_P(limb_t *result, const limb_t *x, size_t xcount, const limb_t *y, size_t ycount)</div><div class="ttdoc">Multiplies two big numbers where one is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00566">BigNumberUtil.cpp:566</a></div></div>
<div class="ttc" id="classBigNumberUtil_html_af49dd38173ea0310776d283aabea2ba0"><div class="ttname"><a href="classBigNumberUtil.html#af49dd38173ea0310776d283aabea2ba0">BigNumberUtil::packBE</a></div><div class="ttdeci">static void packBE(uint8_t *bytes, size_t len, const limb_t *limbs, size_t count)</div><div class="ttdoc">Packs the big-endian byte representation of a big number into a byte array. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00294">BigNumberUtil.cpp:294</a></div></div> <div class="ttc" id="classBigNumberUtil_html_af49dd38173ea0310776d283aabea2ba0"><div class="ttname"><a href="classBigNumberUtil.html#af49dd38173ea0310776d283aabea2ba0">BigNumberUtil::packBE</a></div><div class="ttdeci">static void packBE(uint8_t *bytes, size_t len, const limb_t *limbs, size_t count)</div><div class="ttdoc">Packs the big-endian byte representation of a big number into a byte array. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00294">BigNumberUtil.cpp:294</a></div></div>
<div class="ttc" id="classBigNumberUtil_html_a25041f898c417c8dd63f30536287ed79"><div class="ttname"><a href="classBigNumberUtil.html#a25041f898c417c8dd63f30536287ed79">BigNumberUtil::unpackLE</a></div><div class="ttdeci">static void unpackLE(limb_t *limbs, size_t count, const uint8_t *bytes, size_t len)</div><div class="ttdoc">Unpacks the little-endian byte representation of a big number into a limb array. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00055">BigNumberUtil.cpp:55</a></div></div> <div class="ttc" id="classBigNumberUtil_html_a25041f898c417c8dd63f30536287ed79"><div class="ttname"><a href="classBigNumberUtil.html#a25041f898c417c8dd63f30536287ed79">BigNumberUtil::unpackLE</a></div><div class="ttdeci">static void unpackLE(limb_t *limbs, size_t count, const uint8_t *bytes, size_t len)</div><div class="ttdoc">Unpacks the little-endian byte representation of a big number into a limb array. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00055">BigNumberUtil.cpp:55</a></div></div>
@ -192,7 +199,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -694,7 +694,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -271,7 +271,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -196,7 +196,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -157,7 +157,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -125,7 +125,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -172,7 +172,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -233,7 +233,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -171,7 +171,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -228,7 +228,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -175,7 +175,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -262,7 +262,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -173,7 +173,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -170,7 +170,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -232,7 +232,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -162,7 +162,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -160,7 +160,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -149,7 +149,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -125,7 +125,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -148,7 +148,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -138,7 +138,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -130,7 +130,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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<div class="line"><a name="l00961"></a><span class="lineno"> 961</span>&#160; clean(y);</div> <div class="line"><a name="l00961"></a><span class="lineno"> 961</span>&#160; clean(y);</div>
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@ -173,7 +173,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -456,7 +456,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -170,7 +170,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -172,7 +172,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -657,7 +657,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -202,7 +202,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -575,7 +575,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -190,7 +190,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -257,7 +257,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -257,7 +257,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -257,7 +257,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -282,7 +282,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -186,7 +186,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -557,7 +557,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
<div class="ttc" id="classBigNumberUtil_html_a00c9cde0b626788a60552a6bc9ce058b"><div class="ttname"><a href="classBigNumberUtil.html#a00c9cde0b626788a60552a6bc9ce058b">BigNumberUtil::reduceQuick_P</a></div><div class="ttdeci">static void reduceQuick_P(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Reduces x modulo y using subtraction where y is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00620">BigNumberUtil.cpp:620</a></div></div> <div class="ttc" id="classBigNumberUtil_html_a00c9cde0b626788a60552a6bc9ce058b"><div class="ttname"><a href="classBigNumberUtil.html#a00c9cde0b626788a60552a6bc9ce058b">BigNumberUtil::reduceQuick_P</a></div><div class="ttdeci">static void reduceQuick_P(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Reduces x modulo y using subtraction where y is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00620">BigNumberUtil.cpp:620</a></div></div>
<div class="ttc" id="classEd25519_html_ab8be5115ac5adc8a556dbac7d7e90d2e"><div class="ttname"><a href="classEd25519.html#ab8be5115ac5adc8a556dbac7d7e90d2e">Ed25519::generatePrivateKey</a></div><div class="ttdeci">static void generatePrivateKey(uint8_t privateKey[32])</div><div class="ttdoc">Generates a private key for Ed25519 signing operations. </div><div class="ttdef"><b>Definition:</b> <a href="Ed25519_8cpp_source.html#l00243">Ed25519.cpp:243</a></div></div> <div class="ttc" id="classEd25519_html_ab8be5115ac5adc8a556dbac7d7e90d2e"><div class="ttname"><a href="classEd25519.html#ab8be5115ac5adc8a556dbac7d7e90d2e">Ed25519::generatePrivateKey</a></div><div class="ttdeci">static void generatePrivateKey(uint8_t privateKey[32])</div><div class="ttdoc">Generates a private key for Ed25519 signing operations. </div><div class="ttdef"><b>Definition:</b> <a href="Ed25519_8cpp_source.html#l00243">Ed25519.cpp:243</a></div></div>
<div class="ttc" id="classBigNumberUtil_html_aa6904b2727af6b767fe041b1b7f27414"><div class="ttname"><a href="classBigNumberUtil.html#aa6904b2727af6b767fe041b1b7f27414">BigNumberUtil::add</a></div><div class="ttdeci">static limb_t add(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Adds two big numbers. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00381">BigNumberUtil.cpp:381</a></div></div> <div class="ttc" id="classBigNumberUtil_html_aa6904b2727af6b767fe041b1b7f27414"><div class="ttname"><a href="classBigNumberUtil.html#aa6904b2727af6b767fe041b1b7f27414">BigNumberUtil::add</a></div><div class="ttdeci">static limb_t add(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Adds two big numbers. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00381">BigNumberUtil.cpp:381</a></div></div>
<div class="ttc" id="classRNGClass_html_a418a833cf18198fd7e5d6dbd78c99c29"><div class="ttname"><a href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29">RNGClass::rand</a></div><div class="ttdeci">void rand(uint8_t *data, size_t len)</div><div class="ttdoc">Generates random bytes into a caller-supplied buffer. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00298">RNG.cpp:298</a></div></div> <div class="ttc" id="classRNGClass_html_a418a833cf18198fd7e5d6dbd78c99c29"><div class="ttname"><a href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29">RNGClass::rand</a></div><div class="ttdeci">void rand(uint8_t *data, size_t len)</div><div class="ttdoc">Generates random bytes into a caller-supplied buffer. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00428">RNG.cpp:428</a></div></div>
<div class="ttc" id="classEd25519_html_ae3e2fc405c9cd8cb1d3ab9b8b452d3e4"><div class="ttname"><a href="classEd25519.html#ae3e2fc405c9cd8cb1d3ab9b8b452d3e4">Ed25519::verify</a></div><div class="ttdeci">static bool verify(const uint8_t signature[64], const uint8_t publicKey[32], const void *message, size_t len)</div><div class="ttdoc">Verifies a signature using a specific Ed25519 public key. </div><div class="ttdef"><b>Definition:</b> <a href="Ed25519_8cpp_source.html#l00189">Ed25519.cpp:189</a></div></div> <div class="ttc" id="classEd25519_html_ae3e2fc405c9cd8cb1d3ab9b8b452d3e4"><div class="ttname"><a href="classEd25519.html#ae3e2fc405c9cd8cb1d3ab9b8b452d3e4">Ed25519::verify</a></div><div class="ttdeci">static bool verify(const uint8_t signature[64], const uint8_t publicKey[32], const void *message, size_t len)</div><div class="ttdoc">Verifies a signature using a specific Ed25519 public key. </div><div class="ttdef"><b>Definition:</b> <a href="Ed25519_8cpp_source.html#l00189">Ed25519.cpp:189</a></div></div>
<div class="ttc" id="classSHA512_html"><div class="ttname"><a href="classSHA512.html">SHA512</a></div><div class="ttdoc">SHA-512 hash algorithm. </div><div class="ttdef"><b>Definition:</b> <a href="SHA512_8h_source.html#l00030">SHA512.h:30</a></div></div> <div class="ttc" id="classSHA512_html"><div class="ttname"><a href="classSHA512.html">SHA512</a></div><div class="ttdoc">SHA-512 hash algorithm. </div><div class="ttdef"><b>Definition:</b> <a href="SHA512_8h_source.html#l00030">SHA512.h:30</a></div></div>
<div class="ttc" id="classSHA512_html_a0d009e8d9157c3f14323e68631c33e97"><div class="ttname"><a href="classSHA512.html#a0d009e8d9157c3f14323e68631c33e97">SHA512::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdoc">Resets the hash ready for a new hashing process. </div><div class="ttdef"><b>Definition:</b> <a href="SHA512_8cpp_source.html#l00066">SHA512.cpp:66</a></div></div> <div class="ttc" id="classSHA512_html_a0d009e8d9157c3f14323e68631c33e97"><div class="ttname"><a href="classSHA512.html#a0d009e8d9157c3f14323e68631c33e97">SHA512::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdoc">Resets the hash ready for a new hashing process. </div><div class="ttdef"><b>Definition:</b> <a href="SHA512_8cpp_source.html#l00066">SHA512.cpp:66</a></div></div>
@ -572,7 +572,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -168,7 +168,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -196,7 +196,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -164,7 +164,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -278,7 +278,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -172,7 +172,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -352,7 +352,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -191,7 +191,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -239,7 +239,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -152,7 +152,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -151,7 +151,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -154,7 +154,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -115,7 +115,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -246,7 +246,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -134,11 +134,11 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
<div class="ttc" id="classNoiseSource_html_a48d0efabd71ff6e557a0898be79c49ba"><div class="ttname"><a href="classNoiseSource.html#a48d0efabd71ff6e557a0898be79c49ba">NoiseSource::added</a></div><div class="ttdeci">virtual void added()</div><div class="ttdoc">Called when the noise source is added to RNG with RNG.addNoiseSource(). </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8cpp_source.html#l00095">NoiseSource.cpp:95</a></div></div> <div class="ttc" id="classNoiseSource_html_a48d0efabd71ff6e557a0898be79c49ba"><div class="ttname"><a href="classNoiseSource.html#a48d0efabd71ff6e557a0898be79c49ba">NoiseSource::added</a></div><div class="ttdeci">virtual void added()</div><div class="ttdoc">Called when the noise source is added to RNG with RNG.addNoiseSource(). </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8cpp_source.html#l00095">NoiseSource.cpp:95</a></div></div>
<div class="ttc" id="classNoiseSource_html_a1af7449a5ae4a8acd34ac218c9eec6c1"><div class="ttname"><a href="classNoiseSource.html#a1af7449a5ae4a8acd34ac218c9eec6c1">NoiseSource::output</a></div><div class="ttdeci">virtual void output(const uint8_t *data, size_t len, unsigned int credit)</div><div class="ttdoc">Called from subclasses to output noise to the global random number pool. </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8cpp_source.html#l00117">NoiseSource.cpp:117</a></div></div> <div class="ttc" id="classNoiseSource_html_a1af7449a5ae4a8acd34ac218c9eec6c1"><div class="ttname"><a href="classNoiseSource.html#a1af7449a5ae4a8acd34ac218c9eec6c1">NoiseSource::output</a></div><div class="ttdeci">virtual void output(const uint8_t *data, size_t len, unsigned int credit)</div><div class="ttdoc">Called from subclasses to output noise to the global random number pool. </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8cpp_source.html#l00117">NoiseSource.cpp:117</a></div></div>
<div class="ttc" id="classNoiseSource_html_a4eca1e894a5d719fb9bf4df34a791cdb"><div class="ttname"><a href="classNoiseSource.html#a4eca1e894a5d719fb9bf4df34a791cdb">NoiseSource::~NoiseSource</a></div><div class="ttdeci">virtual ~NoiseSource()</div><div class="ttdoc">Destroys this random noise source. </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8cpp_source.html#l00043">NoiseSource.cpp:43</a></div></div> <div class="ttc" id="classNoiseSource_html_a4eca1e894a5d719fb9bf4df34a791cdb"><div class="ttname"><a href="classNoiseSource.html#a4eca1e894a5d719fb9bf4df34a791cdb">NoiseSource::~NoiseSource</a></div><div class="ttdeci">virtual ~NoiseSource()</div><div class="ttdoc">Destroys this random noise source. </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8cpp_source.html#l00043">NoiseSource.cpp:43</a></div></div>
<div class="ttc" id="classRNGClass_html_ad99535ea23ae2fec55bdebb8c24def02"><div class="ttname"><a href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">RNGClass::stir</a></div><div class="ttdeci">void stir(const uint8_t *data, size_t len, unsigned int credit=0)</div><div class="ttdoc">Stirs additional entropy data into the random pool. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00408">RNG.cpp:408</a></div></div> <div class="ttc" id="classRNGClass_html_ad99535ea23ae2fec55bdebb8c24def02"><div class="ttname"><a href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">RNGClass::stir</a></div><div class="ttdeci">void stir(const uint8_t *data, size_t len, unsigned int credit=0)</div><div class="ttdoc">Stirs additional entropy data into the random pool. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00538">RNG.cpp:538</a></div></div>
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@ -171,7 +171,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -155,7 +155,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -158,7 +158,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
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@ -116,266 +116,434 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &quot;Crypto.h&quot;</span></div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &quot;Crypto.h&quot;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &quot;utility/ProgMemUtil.h&quot;</span></div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &quot;utility/ProgMemUtil.h&quot;</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &lt;Arduino.h&gt;</span></div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &lt;Arduino.h&gt;</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#include &lt;avr/eeprom.h&gt;</span></div> <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#if defined (__arm__) &amp;&amp; defined (__SAM3X8E__)</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &lt;string.h&gt;</span></div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor"></span><span class="comment">// The Arduino Due does not have any EEPROM natively on the main chip.</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;</div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="comment">// However, it does have a TRNG and flash memory.</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;<a class="code" href="classRNGClass.html">RNGClass</a> RNG;</div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor">#define RNG_DUE_TRNG 1</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;</div> <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;<span class="comment">// Number of ChaCha hash rounds to use for random number generation.</span></div> <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_EEPROM 1</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;<span class="preprocessor">#define RNG_ROUNDS 20</span></div> <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#include &lt;avr/eeprom.h&gt;</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;<span class="preprocessor"></span></div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160;<span class="comment">// Force a rekey after this many blocks of random data.</span></div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#include &lt;string.h&gt;</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;<span class="preprocessor">#define RNG_REKEY_BLOCKS 16</span></div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;<span class="preprocessor"></span></div> <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160;<a class="code" href="classRNGClass.html">RNGClass</a> RNG;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;<span class="comment">// Maximum entropy credit that can be contained in the pool.</span></div> <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;<span class="preprocessor">#define RNG_MAX_CREDITS 384</span></div> <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160;<span class="comment">// Number of ChaCha hash rounds to use for random number generation.</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160;<span class="preprocessor"></span></div> <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;<span class="preprocessor">#define RNG_ROUNDS 20</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160;<span class="comment">// Tag for 256-bit ChaCha20 keys. This will always appear in the</span></div> <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160;<span class="comment">// first 16 bytes of the block. The remaining 48 bytes are the seed.</span></div> <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160;<span class="comment">// Force a rekey after this many blocks of random data.</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;<span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> tagRNG[16] PROGMEM = {</div> <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;<span class="preprocessor">#define RNG_REKEY_BLOCKS 16</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; <span class="charliteral">&#39;e&#39;</span>, <span class="charliteral">&#39;x&#39;</span>, <span class="charliteral">&#39;p&#39;</span>, <span class="charliteral">&#39;a&#39;</span>, <span class="charliteral">&#39;n&#39;</span>, <span class="charliteral">&#39;d&#39;</span>, <span class="charliteral">&#39; &#39;</span>, <span class="charliteral">&#39;3&#39;</span>,</div> <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; <span class="charliteral">&#39;2&#39;</span>, <span class="charliteral">&#39;-&#39;</span>, <span class="charliteral">&#39;b&#39;</span>, <span class="charliteral">&#39;y&#39;</span>, <span class="charliteral">&#39;t&#39;</span>, <span class="charliteral">&#39;e&#39;</span>, <span class="charliteral">&#39; &#39;</span>, <span class="charliteral">&#39;k&#39;</span></div> <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160;<span class="comment">// Maximum entropy credit that can be contained in the pool.</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;};</div> <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;<span class="preprocessor">#define RNG_MAX_CREDITS 384</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160;</div> <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160;<span class="comment">// Initialization seed. This is the ChaCha20 output of hashing</span></div> <div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160;<span class="comment">// Tag for 256-bit ChaCha20 keys. This will always appear in the</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;<span class="comment">// &quot;expand 32-byte k&quot; followed by 48 bytes set to the numbers 1 to 48.</span></div> <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160;<span class="comment">// first 16 bytes of the block. The remaining 48 bytes are the seed.</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;<span class="comment">// The ChaCha20 output block is then truncated to the first 48 bytes.</span></div> <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160;<span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> tagRNG[16] PROGMEM = {</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160;<span class="comment">//</span></div> <div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; <span class="charliteral">&#39;e&#39;</span>, <span class="charliteral">&#39;x&#39;</span>, <span class="charliteral">&#39;p&#39;</span>, <span class="charliteral">&#39;a&#39;</span>, <span class="charliteral">&#39;n&#39;</span>, <span class="charliteral">&#39;d&#39;</span>, <span class="charliteral">&#39; &#39;</span>, <span class="charliteral">&#39;3&#39;</span>,</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;<span class="comment">// This value is intended to start the RNG in a semi-chaotic state if</span></div> <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <span class="charliteral">&#39;2&#39;</span>, <span class="charliteral">&#39;-&#39;</span>, <span class="charliteral">&#39;b&#39;</span>, <span class="charliteral">&#39;y&#39;</span>, <span class="charliteral">&#39;t&#39;</span>, <span class="charliteral">&#39;e&#39;</span>, <span class="charliteral">&#39; &#39;</span>, <span class="charliteral">&#39;k&#39;</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160;<span class="comment">// we don&#39;t have a previously saved seed in EEPROM.</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;<span class="keyword">static</span> <span class="keyword">const</span> uint8_t initRNG[48] PROGMEM = {</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; 0xB0, 0x2A, 0xAE, 0x7D, 0xEE, 0xCB, 0xBB, 0xB1,</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; 0xFC, 0x03, 0x6F, 0xDD, 0xDC, 0x7D, 0x76, 0x67,</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; 0x0C, 0xE8, 0x1F, 0x0D, 0xA3, 0xA0, 0xAA, 0x1E,</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; 0xB0, 0xBD, 0x72, 0x6B, 0x2B, 0x4C, 0x8A, 0x7E,</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; 0x34, 0xFC, 0x37, 0x60, 0xF4, 0x1E, 0x22, 0xA0,</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; 0x0B, 0xFB, 0x18, 0x84, 0x60, 0xA5, 0x77, 0x72</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;};</div> <div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;};</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160;</div> <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160;</div>
<div class="line"><a name="l00167"></a><span class="lineno"><a class="line" href="classRNGClass.html#acbcf327242f51ae2d9209aeaa45e30e9"> 167</a></span>&#160;<a class="code" href="classRNGClass.html#acbcf327242f51ae2d9209aeaa45e30e9">RNGClass::RNGClass</a>()</div> <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160;<span class="comment">// Initialization seed. This is the ChaCha20 output of hashing</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; : address(0)</div> <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160;<span class="comment">// &quot;expand 32-byte k&quot; followed by 48 bytes set to the numbers 1 to 48.</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; , credits(0)</div> <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160;<span class="comment">// The ChaCha20 output block is then truncated to the first 48 bytes.</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; , firstSave(1)</div> <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; , timer(0)</div> <div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160;<span class="comment">// This value is intended to start the RNG in a semi-chaotic state if</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; , timeout(3600000UL) <span class="comment">// 1 hour in milliseconds</span></div> <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160;<span class="comment">// we don&#39;t have a previously saved seed in EEPROM.</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; , count(0)</div> <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;<span class="keyword">static</span> <span class="keyword">const</span> uint8_t initRNG[48] PROGMEM = {</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160;{</div> <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; 0xB0, 0x2A, 0xAE, 0x7D, 0xEE, 0xCB, 0xBB, 0xB1,</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160;}</div> <div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; 0xFC, 0x03, 0x6F, 0xDD, 0xDC, 0x7D, 0x76, 0x67,</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160;</div> <div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; 0x0C, 0xE8, 0x1F, 0x0D, 0xA3, 0xA0, 0xAA, 0x1E,</div>
<div class="line"><a name="l00180"></a><span class="lineno"><a class="line" href="classRNGClass.html#aef3ee2fb14a39caf650dc90a0226dd31"> 180</a></span>&#160;<a class="code" href="classRNGClass.html#aef3ee2fb14a39caf650dc90a0226dd31">RNGClass::~RNGClass</a>()</div> <div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; 0xB0, 0xBD, 0x72, 0x6B, 0x2B, 0x4C, 0x8A, 0x7E,</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160;{</div> <div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; 0x34, 0xFC, 0x37, 0x60, 0xF4, 0x1E, 0x22, 0xA0,</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; clean(block);</div> <div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; 0x0B, 0xFB, 0x18, 0x84, 0x60, 0xA5, 0x77, 0x72</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; clean(stream);</div> <div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160;};</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160;}</div> <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160;</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160;</div> <div class="line"><a name="l00182"></a><span class="lineno"><a class="line" href="classRNGClass.html#acbcf327242f51ae2d9209aeaa45e30e9"> 182</a></span>&#160;<a class="code" href="classRNGClass.html#acbcf327242f51ae2d9209aeaa45e30e9">RNGClass::RNGClass</a>()</div>
<div class="line"><a name="l00202"></a><span class="lineno"><a class="line" href="classRNGClass.html#a7f1aab3c324f8e8a424d683425e0fcf8"> 202</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a7f1aab3c324f8e8a424d683425e0fcf8">RNGClass::begin</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *tag, <span class="keywordtype">int</span> eepromAddress)</div> <div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; : address(0)</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160;{</div> <div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; , credits(0)</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; <span class="comment">// Save the EEPROM address for use by save().</span></div> <div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; , firstSave(1)</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; address = eepromAddress;</div> <div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; , timer(0)</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160;</div> <div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; , timeout(3600000UL) <span class="comment">// 1 hour in milliseconds</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="comment">// Initialize the ChaCha20 input block from the saved seed.</span></div> <div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; , count(0)</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; memcpy_P(block, tagRNG, <span class="keyword">sizeof</span>(tagRNG));</div> <div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; , trngPosn(0)</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; memcpy_P(block + 4, initRNG, <span class="keyword">sizeof</span>(initRNG));</div> <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160;{</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; <span class="keywordflow">if</span> (eeprom_read_byte((<span class="keyword">const</span> uint8_t *)address) == <span class="charliteral">&#39;S&#39;</span>) {</div> <div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160;}</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; <span class="comment">// We have a saved seed: XOR it with the initialization block.</span></div> <div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160;</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> posn = 0; posn &lt; 12; ++posn) {</div> <div class="line"><a name="l00196"></a><span class="lineno"><a class="line" href="classRNGClass.html#aef3ee2fb14a39caf650dc90a0226dd31"> 196</a></span>&#160;<a class="code" href="classRNGClass.html#aef3ee2fb14a39caf650dc90a0226dd31">RNGClass::~RNGClass</a>()</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; block[posn + 4] ^=</div> <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160;{</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; eeprom_read_dword((<span class="keyword">const</span> uint32_t *)(address + posn * 4 + 1));</div> <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160;<span class="preprocessor">#if defined(RNG_DUE_TRNG)</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; }</div> <div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160;<span class="preprocessor"></span> <span class="comment">// Disable the TRNG in the Arduino Due.</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; }</div> <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; REG_TRNG_CR = TRNG_CR_KEY(0x524E47);</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160;</div> <div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="comment">// No entropy credits for the saved seed.</span></div> <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160;<span class="preprocessor"></span> clean(block);</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; credits = 0;</div> <div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; clean(stream);</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160;</div> <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160;}</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <span class="comment">// Trigger an automatic save once the entropy credits max out.</span></div> <div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; firstSave = 1;</div> <div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160;<span class="preprocessor">#if defined(RNG_DUE_TRNG)</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160;</div> <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; <span class="comment">// Rekey the random number generator immediately.</span></div> <div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160;<span class="comment">// Find the flash memory of interest. Allow for the possibility</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; rekey();</div> <div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160;<span class="comment">// of other SAM-based Arduino variants in the future.</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160;</div> <div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160;<span class="preprocessor">#if defined(IFLASH1_ADDR)</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; <span class="comment">// Stir in the supplied tag data but don&#39;t credit any entropy to it.</span></div> <div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_FLASH_ADDR IFLASH1_ADDR</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; <span class="keywordflow">if</span> (tag)</div> <div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_FLASH_SIZE IFLASH1_SIZE</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; <a class="code" href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">stir</a>((<span class="keyword">const</span> uint8_t *)tag, strlen(tag));</div> <div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_FLASH_PAGE_SIZE IFLASH1_PAGE_SIZE</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160;</div> <div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_EFC EFC1</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; <span class="comment">// Re-save the seed to obliterate the previous value and to ensure</span></div> <div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#elif defined(IFLASH0_ADDR)</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160; <span class="comment">// that if the system is reset without a call to save() that we won&#39;t</span></div> <div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_FLASH_ADDR IFLASH0_ADDR</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; <span class="comment">// accidentally generate the same sequence of random data again.</span></div> <div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_FLASH_SIZE IFLASH0_SIZE</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; <a class="code" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">save</a>();</div> <div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_FLASH_PAGE_SIZE IFLASH0_PAGE_SIZE</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160;}</div> <div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_EFC EFC0</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160;</div> <div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"><a class="line" href="classRNGClass.html#aacf23b192b0e4cc8726d9abe05f5a9db"> 249</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#aacf23b192b0e4cc8726d9abe05f5a9db">RNGClass::addNoiseSource</a>(<a class="code" href="classNoiseSource.html">NoiseSource</a> &amp;source)</div> <div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_FLASH_ADDR IFLASH_ADDR</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160;{</div> <div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_FLASH_SIZE IFLASH_SIZE</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160;<span class="preprocessor"> #define MAX_NOISE_SOURCES (sizeof(noiseSources) / sizeof(noiseSources[0]))</span></div> <div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_FLASH_PAGE_SIZE IFLASH_PAGE_SIZE</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160;<span class="preprocessor"></span> <span class="keywordflow">if</span> (count &lt; MAX_NOISE_SOURCES) {</div> <div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_EFC EFC</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; noiseSources[count++] = &amp;source;</div> <div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; source.<a class="code" href="classNoiseSource.html#a48d0efabd71ff6e557a0898be79c49ba">added</a>();</div> <div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; }</div> <div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160;<span class="comment">// Address of the flash page to use for saving the seed on the Due.</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160;}</div> <div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160;<span class="comment">// All SAM variants have a page size of 256 bytes or greater so there is</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160;<span class="comment">// plenty of room for the 48 byte seed in the last page of flash memory.</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160;<span class="preprocessor">#define RNG_SEED_ADDR (RNG_FLASH_ADDR + RNG_FLASH_SIZE - RNG_FLASH_PAGE_SIZE)</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define RNG_SEED_PAGE ((RNG_FLASH_SIZE / RNG_FLASH_PAGE_SIZE) - 1)</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160;<span class="comment">// Stir in the unique identifier for the Arduino Due&#39;s CPU.</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160;<span class="comment">// This function must be in RAM because programs running out of</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160;<span class="comment">// flash memory are not allowed to access the unique identifier.</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160;<span class="comment">// Info from: http://forum.arduino.cc/index.php?topic=289190.0</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160;__attribute__((section(<span class="stringliteral">&quot;.ramfunc&quot;</span>)))</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160;static <span class="keywordtype">void</span> stirUniqueIdentifier(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160;{</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; uint32_t <span class="keywordtype">id</span>[4];</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160;</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; <span class="comment">// Start Read Unique Identifier.</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; RNG_EFC-&gt;EEFC_FCR = (0x5A &lt;&lt; 24) | EFC_FCMD_STUI;</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; <span class="keywordflow">while</span> ((RNG_EFC-&gt;EEFC_FSR &amp; EEFC_FSR_FRDY) != 0)</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; ; <span class="comment">// do nothing until FRDY falls.</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160;</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; <span class="comment">// Read the identifier.</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; <span class="keywordtype">id</span>[0] = *((<span class="keyword">const</span> uint32_t *)RNG_FLASH_ADDR);</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; <span class="keywordtype">id</span>[1] = *((<span class="keyword">const</span> uint32_t *)(RNG_FLASH_ADDR + 4));</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="keywordtype">id</span>[2] = *((<span class="keyword">const</span> uint32_t *)(RNG_FLASH_ADDR + 8));</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; <span class="keywordtype">id</span>[3] = *((<span class="keyword">const</span> uint32_t *)(RNG_FLASH_ADDR + 12));</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160;</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; <span class="comment">// Stop Read Unique Identifier.</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; RNG_EFC-&gt;EEFC_FCR = (0x5A &lt;&lt; 24) | EFC_FCMD_SPUI;</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; <span class="keywordflow">while</span> ((RNG_EFC-&gt;EEFC_FSR &amp; EEFC_FSR_FRDY) == 0)</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; ; <span class="comment">// do nothing until FRDY rises.</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160;</div> <div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160;</div>
<div class="line"><a name="l00274"></a><span class="lineno"><a class="line" href="classRNGClass.html#a5848e87a5f2f0302c88b0377f0e3366d"> 274</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a5848e87a5f2f0302c88b0377f0e3366d">RNGClass::setAutoSaveTime</a>(uint16_t minutes)</div> <div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; <span class="comment">// Stir the unique identifier into the entropy pool.</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160;{</div> <div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; RNG.<a class="code" href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">stir</a>((uint8_t *)<span class="keywordtype">id</span>, <span class="keyword">sizeof</span>(<span class="keywordtype">id</span>));</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; <span class="keywordflow">if</span> (!minutes)</div> <div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160;}</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160; minutes = 1; <span class="comment">// Just in case.</span></div> <div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160;</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; timeout = ((uint32_t)minutes) * 60000U;</div> <div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160;<span class="comment">// Erases the flash page containing the seed and then writes the new seed.</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160;}</div> <div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160;<span class="comment">// It is assumed the seed has already been loaded into the latch registers.</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160;</div> <div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160;__attribute__((section(<span class="stringliteral">&quot;.ramfunc&quot;</span>)))</div>
<div class="line"><a name="l00298"></a><span class="lineno"><a class="line" href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29"> 298</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29">RNGClass::rand</a>(uint8_t *data, <span class="keywordtype">size_t</span> len)</div> <div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160;static <span class="keywordtype">void</span> eraseAndWriteSeed()</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160;{</div> <div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160;{</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; <span class="comment">// Decrease the amount of entropy in the pool.</span></div> <div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; <span class="comment">// Execute the &quot;Erase and Write Page&quot; command.</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; <span class="keywordflow">if</span> (len &gt; (credits / 8))</div> <div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; RNG_EFC-&gt;EEFC_FCR = (0x5A &lt;&lt; 24) | (RNG_SEED_PAGE &lt;&lt; 8) | EFC_FCMD_EWP;</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; credits = 0;</div> <div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160;</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; <span class="keywordflow">else</span></div> <div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160; <span class="comment">// Wait for the FRDY bit to be raised.</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; credits -= len * 8;</div> <div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; <span class="keywordflow">while</span> ((RNG_EFC-&gt;EEFC_FSR &amp; EEFC_FSR_FRDY) == 0)</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160;</div> <div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; ; <span class="comment">// do nothing until FRDY rises.</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; <span class="comment">// Generate the random data.</span></div> <div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160;}</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; uint8_t count = 0;</div> <div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160;</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; <span class="keywordflow">while</span> (len &gt; 0) {</div> <div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; <span class="comment">// Force a rekey if we have generated too many blocks in this request.</span></div> <div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; <span class="keywordflow">if</span> (count &gt;= RNG_REKEY_BLOCKS) {</div> <div class="line"><a name="l00296"></a><span class="lineno"><a class="line" href="classRNGClass.html#a7f1aab3c324f8e8a424d683425e0fcf8"> 296</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a7f1aab3c324f8e8a424d683425e0fcf8">RNGClass::begin</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *tag, <span class="keywordtype">int</span> eepromAddress)</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; rekey();</div> <div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160;{</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160; count = 1;</div> <div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; <span class="comment">// Save the EEPROM address for use by save().</span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160; } <span class="keywordflow">else</span> {</div> <div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; address = eepromAddress;</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; ++count;</div> <div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160;</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; }</div> <div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; <span class="comment">// Initialize the ChaCha20 input block from the saved seed.</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160;</div> <div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; memcpy_P(block, tagRNG, <span class="keyword">sizeof</span>(tagRNG));</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; <span class="comment">// Increment the low counter word and generate a new keystream block.</span></div> <div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; memcpy_P(block + 4, initRNG, <span class="keyword">sizeof</span>(initRNG));</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; ++(block[12]);</div> <div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160;<span class="preprocessor">#if defined(RNG_EEPROM)</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; <a class="code" href="classChaCha.html#a41ac3262e52ff49dcd916d0b3b2e2038">ChaCha::hashCore</a>(stream, block, RNG_ROUNDS);</div> <div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160;<span class="preprocessor"></span> <span class="keywordflow">if</span> (eeprom_read_byte((<span class="keyword">const</span> uint8_t *)address) == <span class="charliteral">&#39;S&#39;</span>) {</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; <span class="comment">// We have a saved seed: XOR it with the initialization block.</span></div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> posn = 0; posn &lt; 12; ++posn) {</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; block[posn + 4] ^=</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; eeprom_read_dword((<span class="keyword">const</span> uint32_t *)(address + posn * 4 + 1));</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; }</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; }</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160;<span class="preprocessor">#elif defined(RNG_DUE_TRNG)</span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160;<span class="preprocessor"></span> <span class="comment">// Do we have a seed saved in the last page of flash memory on the Due?</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; <span class="keywordtype">int</span> posn, counter;</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; <span class="keywordflow">if</span> (((<span class="keyword">const</span> uint32_t *)RNG_SEED_ADDR)[0] == <span class="charliteral">&#39;S&#39;</span>) {</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; <span class="comment">// XOR the saved seed with the initialization block.</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; <span class="keywordflow">for</span> (posn = 0; posn &lt; 12; ++posn)</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; block[posn + 4] ^= ((<span class="keyword">const</span> uint32_t *)RNG_SEED_ADDR)[posn + 1];</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; }</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160;</div> <div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160;</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; <span class="comment">// Copy the data to the return buffer.</span></div> <div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; <span class="comment">// If the device has just been reprogrammed, there will be no saved seed.</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160; <span class="keywordflow">if</span> (len &lt; 64) {</div> <div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160; <span class="comment">// XOR the initialization block with some output from the CPU&#39;s TRNG</span></div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; memcpy(data, stream, len);</div> <div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; <span class="comment">// to permute the state in a first boot situation after reprogramming.</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160; <span class="keywordflow">break</span>;</div> <div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160; pmc_enable_periph_clk(ID_TRNG);</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; } <span class="keywordflow">else</span> {</div> <div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; REG_TRNG_CR = TRNG_CR_KEY(0x524E47) | TRNG_CR_ENABLE;</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160; memcpy(data, stream, 64);</div> <div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160; REG_TRNG_IDR = TRNG_IDR_DATRDY; <span class="comment">// Disable interrupts - we will poll.</span></div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; data += 64;</div> <div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; <span class="keywordflow">for</span> (posn = 0; posn &lt; 12; ++posn) {</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160; len -= 64;</div> <div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160; <span class="comment">// According to the documentation the TRNG should produce a new</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>&#160; }</div> <div class="line"><a name="l00329"></a><span class="lineno"> 329</span>&#160; <span class="comment">// 32-bit random value every 84 clock cycles. If it still hasn&#39;t</span></div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>&#160; }</div> <div class="line"><a name="l00330"></a><span class="lineno"> 330</span>&#160; <span class="comment">// produced a value after 200 iterations, then assume that the</span></div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>&#160;</div> <div class="line"><a name="l00331"></a><span class="lineno"> 331</span>&#160; <span class="comment">// TRNG is not producing output and stop.</span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>&#160; <span class="comment">// Force a rekey after every request.</span></div> <div class="line"><a name="l00332"></a><span class="lineno"> 332</span>&#160; <span class="keywordflow">for</span> (counter = 0; counter &lt; 200; ++counter) {</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; rekey();</div> <div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; <span class="keywordflow">if</span> ((REG_TRNG_ISR &amp; TRNG_ISR_DATRDY) != 0)</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160;}</div> <div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160;</div> <div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160; }</div>
<div class="line"><a name="l00375"></a><span class="lineno"><a class="line" href="classRNGClass.html#a49e3231ba65a5e4b045bc90976e0a659"> 375</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classRNGClass.html#a49e3231ba65a5e4b045bc90976e0a659">RNGClass::available</a>(<span class="keywordtype">size_t</span> len)<span class="keyword"> const</span></div> <div class="line"><a name="l00336"></a><span class="lineno"> 336</span>&#160; <span class="keywordflow">if</span> (counter &gt;= 200)</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>&#160;<span class="keyword"></span>{</div> <div class="line"><a name="l00337"></a><span class="lineno"> 337</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>&#160; <span class="keywordflow">if</span> (len &gt;= (RNG_MAX_CREDITS / 8))</div> <div class="line"><a name="l00338"></a><span class="lineno"> 338</span>&#160; block[posn + 4] ^= REG_TRNG_ODATA;</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>&#160; <span class="keywordflow">return</span> credits &gt;= RNG_MAX_CREDITS;</div> <div class="line"><a name="l00339"></a><span class="lineno"> 339</span>&#160; }</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>&#160; <span class="keywordflow">else</span></div> <div class="line"><a name="l00340"></a><span class="lineno"> 340</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>&#160; <span class="keywordflow">return</span> len &lt;= (credits / 8);</div> <div class="line"><a name="l00341"></a><span class="lineno"> 341</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>&#160;}</div> <div class="line"><a name="l00342"></a><span class="lineno"> 342</span>&#160; <span class="comment">// No entropy credits for the saved seed.</span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>&#160;</div> <div class="line"><a name="l00343"></a><span class="lineno"> 343</span>&#160; credits = 0;</div>
<div class="line"><a name="l00408"></a><span class="lineno"><a class="line" href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02"> 408</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">RNGClass::stir</a>(<span class="keyword">const</span> uint8_t *data, <span class="keywordtype">size_t</span> len, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> credit)</div> <div class="line"><a name="l00344"></a><span class="lineno"> 344</span>&#160;</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>&#160;{</div> <div class="line"><a name="l00345"></a><span class="lineno"> 345</span>&#160; <span class="comment">// Trigger an automatic save once the entropy credits max out.</span></div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>&#160; <span class="comment">// Increase the entropy credit.</span></div> <div class="line"><a name="l00346"></a><span class="lineno"> 346</span>&#160; firstSave = 1;</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>&#160; <span class="keywordflow">if</span> ((credit / 8) &gt;= len)</div> <div class="line"><a name="l00347"></a><span class="lineno"> 347</span>&#160;</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>&#160; credit = len * 8;</div> <div class="line"><a name="l00348"></a><span class="lineno"> 348</span>&#160; <span class="comment">// Rekey the random number generator immediately.</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>&#160; <span class="keywordflow">if</span> ((RNG_MAX_CREDITS - credits) &gt; credit)</div> <div class="line"><a name="l00349"></a><span class="lineno"> 349</span>&#160; rekey();</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>&#160; credits += credit;</div> <div class="line"><a name="l00350"></a><span class="lineno"> 350</span>&#160;</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>&#160; <span class="keywordflow">else</span></div> <div class="line"><a name="l00351"></a><span class="lineno"> 351</span>&#160; <span class="comment">// Stir in the supplied tag data but don&#39;t credit any entropy to it.</span></div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>&#160; credits = RNG_MAX_CREDITS;</div> <div class="line"><a name="l00352"></a><span class="lineno"> 352</span>&#160; <span class="keywordflow">if</span> (tag)</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>&#160;</div> <div class="line"><a name="l00353"></a><span class="lineno"> 353</span>&#160; <a class="code" href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">stir</a>((<span class="keyword">const</span> uint8_t *)tag, strlen(tag));</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>&#160; <span class="comment">// Process the supplied input data.</span></div> <div class="line"><a name="l00354"></a><span class="lineno"> 354</span>&#160;</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>&#160; <span class="keywordflow">if</span> (len &gt; 0) {</div> <div class="line"><a name="l00355"></a><span class="lineno"> 355</span>&#160;<span class="preprocessor">#if defined(RNG_DUE_TRNG)</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>&#160; <span class="comment">// XOR the data with the ChaCha input block in 48 byte</span></div> <div class="line"><a name="l00356"></a><span class="lineno"> 356</span>&#160;<span class="preprocessor"></span> <span class="comment">// Stir in the unique identifier for the CPU so that different</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>&#160; <span class="comment">// chunks and rekey the ChaCha cipher for each chunk to mix</span></div> <div class="line"><a name="l00357"></a><span class="lineno"> 357</span>&#160; <span class="comment">// devices will give different outputs even without seeding.</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>&#160; <span class="comment">// the data in. This should scatter any &quot;true entropy&quot; in</span></div> <div class="line"><a name="l00358"></a><span class="lineno"> 358</span>&#160; stirUniqueIdentifier();</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>&#160; <span class="comment">// the input across the entire block.</span></div> <div class="line"><a name="l00359"></a><span class="lineno"> 359</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>&#160; <span class="keywordflow">while</span> (len &gt; 0) {</div> <div class="line"><a name="l00360"></a><span class="lineno"> 360</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>&#160; <span class="keywordtype">size_t</span> templen = len;</div> <div class="line"><a name="l00361"></a><span class="lineno"> 361</span>&#160; <span class="comment">// Re-save the seed to obliterate the previous value and to ensure</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>&#160; <span class="keywordflow">if</span> (templen &gt; 48)</div> <div class="line"><a name="l00362"></a><span class="lineno"> 362</span>&#160; <span class="comment">// that if the system is reset without a call to save() that we won&#39;t</span></div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>&#160; templen = 48;</div> <div class="line"><a name="l00363"></a><span class="lineno"> 363</span>&#160; <span class="comment">// accidentally generate the same sequence of random data again.</span></div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>&#160; uint8_t *output = ((uint8_t *)block) + 16;</div> <div class="line"><a name="l00364"></a><span class="lineno"> 364</span>&#160; <a class="code" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">save</a>();</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>&#160; len -= templen;</div> <div class="line"><a name="l00365"></a><span class="lineno"> 365</span>&#160;}</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>&#160; <span class="keywordflow">while</span> (templen &gt; 0) {</div> <div class="line"><a name="l00366"></a><span class="lineno"> 366</span>&#160;</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>&#160; *output++ ^= *data++;</div> <div class="line"><a name="l00379"></a><span class="lineno"><a class="line" href="classRNGClass.html#aacf23b192b0e4cc8726d9abe05f5a9db"> 379</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#aacf23b192b0e4cc8726d9abe05f5a9db">RNGClass::addNoiseSource</a>(<a class="code" href="classNoiseSource.html">NoiseSource</a> &amp;source)</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>&#160; --templen;</div> <div class="line"><a name="l00380"></a><span class="lineno"> 380</span>&#160;{</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>&#160; }</div> <div class="line"><a name="l00381"></a><span class="lineno"> 381</span>&#160;<span class="preprocessor"> #define MAX_NOISE_SOURCES (sizeof(noiseSources) / sizeof(noiseSources[0]))</span></div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>&#160; rekey();</div> <div class="line"><a name="l00382"></a><span class="lineno"> 382</span>&#160;<span class="preprocessor"></span> <span class="keywordflow">if</span> (count &lt; MAX_NOISE_SOURCES) {</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>&#160; }</div> <div class="line"><a name="l00383"></a><span class="lineno"> 383</span>&#160; noiseSources[count++] = &amp;source;</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>&#160; } <span class="keywordflow">else</span> {</div> <div class="line"><a name="l00384"></a><span class="lineno"> 384</span>&#160; source.<a class="code" href="classNoiseSource.html#a48d0efabd71ff6e557a0898be79c49ba">added</a>();</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>&#160; <span class="comment">// There was no input data, so just force a rekey so we</span></div> <div class="line"><a name="l00385"></a><span class="lineno"> 385</span>&#160; }</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>&#160; <span class="comment">// get some mixing of the state even without new data.</span></div> <div class="line"><a name="l00386"></a><span class="lineno"> 386</span>&#160;}</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>&#160; rekey();</div> <div class="line"><a name="l00387"></a><span class="lineno"> 387</span>&#160;</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>&#160; }</div> <div class="line"><a name="l00404"></a><span class="lineno"><a class="line" href="classRNGClass.html#a5848e87a5f2f0302c88b0377f0e3366d"> 404</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a5848e87a5f2f0302c88b0377f0e3366d">RNGClass::setAutoSaveTime</a>(uint16_t minutes)</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>&#160;</div> <div class="line"><a name="l00405"></a><span class="lineno"> 405</span>&#160;{</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>&#160; <span class="comment">// Save if this is the first time we have reached max entropy.</span></div> <div class="line"><a name="l00406"></a><span class="lineno"> 406</span>&#160; <span class="keywordflow">if</span> (!minutes)</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>&#160; <span class="comment">// This provides some protection if the system is powered off before</span></div> <div class="line"><a name="l00407"></a><span class="lineno"> 407</span>&#160; minutes = 1; <span class="comment">// Just in case.</span></div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>&#160; <span class="comment">// the first auto-save timeout occurs.</span></div> <div class="line"><a name="l00408"></a><span class="lineno"> 408</span>&#160; timeout = ((uint32_t)minutes) * 60000U;</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>&#160; <span class="keywordflow">if</span> (firstSave &amp;&amp; credits &gt;= RNG_MAX_CREDITS) {</div> <div class="line"><a name="l00409"></a><span class="lineno"> 409</span>&#160;}</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>&#160; firstSave = 0;</div> <div class="line"><a name="l00410"></a><span class="lineno"> 410</span>&#160;</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>&#160; <a class="code" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">save</a>();</div> <div class="line"><a name="l00428"></a><span class="lineno"><a class="line" href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29"> 428</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29">RNGClass::rand</a>(uint8_t *data, <span class="keywordtype">size_t</span> len)</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>&#160; }</div> <div class="line"><a name="l00429"></a><span class="lineno"> 429</span>&#160;{</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>&#160;}</div> <div class="line"><a name="l00430"></a><span class="lineno"> 430</span>&#160; <span class="comment">// Decrease the amount of entropy in the pool.</span></div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>&#160; <span class="keywordflow">if</span> (len &gt; (credits / 8))</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>&#160; credits = 0;</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>&#160; credits -= len * 8;</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>&#160;</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>&#160; <span class="comment">// Generate the random data.</span></div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>&#160; uint8_t count = 0;</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>&#160; <span class="keywordflow">while</span> (len &gt; 0) {</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>&#160; <span class="comment">// Force a rekey if we have generated too many blocks in this request.</span></div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>&#160; <span class="keywordflow">if</span> (count &gt;= RNG_REKEY_BLOCKS) {</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>&#160; rekey();</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>&#160; count = 1;</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>&#160; ++count;</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>&#160; }</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>&#160;</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>&#160; <span class="comment">// Increment the low counter word and generate a new keystream block.</span></div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>&#160; ++(block[12]);</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>&#160; <a class="code" href="classChaCha.html#a41ac3262e52ff49dcd916d0b3b2e2038">ChaCha::hashCore</a>(stream, block, RNG_ROUNDS);</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>&#160;</div> <div class="line"><a name="l00450"></a><span class="lineno"> 450</span>&#160;</div>
<div class="line"><a name="l00477"></a><span class="lineno"><a class="line" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7"> 477</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">RNGClass::save</a>()</div> <div class="line"><a name="l00451"></a><span class="lineno"> 451</span>&#160; <span class="comment">// Copy the data to the return buffer.</span></div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>&#160;{</div> <div class="line"><a name="l00452"></a><span class="lineno"> 452</span>&#160; <span class="keywordflow">if</span> (len &lt; 64) {</div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>&#160; <span class="comment">// Generate random data from the current state and save</span></div> <div class="line"><a name="l00453"></a><span class="lineno"> 453</span>&#160; memcpy(data, stream, len);</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>&#160; <span class="comment">// that as the seed. Then force a rekey.</span></div> <div class="line"><a name="l00454"></a><span class="lineno"> 454</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>&#160; ++(block[12]);</div> <div class="line"><a name="l00455"></a><span class="lineno"> 455</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>&#160; <a class="code" href="classChaCha.html#a41ac3262e52ff49dcd916d0b3b2e2038">ChaCha::hashCore</a>(stream, block, RNG_ROUNDS);</div> <div class="line"><a name="l00456"></a><span class="lineno"> 456</span>&#160; memcpy(data, stream, 64);</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>&#160; eeprom_write_block(stream, (<span class="keywordtype">void</span> *)(address + 1), 48);</div> <div class="line"><a name="l00457"></a><span class="lineno"> 457</span>&#160; data += 64;</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>&#160; eeprom_update_byte((uint8_t *)address, <span class="charliteral">&#39;S&#39;</span>);</div> <div class="line"><a name="l00458"></a><span class="lineno"> 458</span>&#160; len -= 64;</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>&#160; rekey();</div> <div class="line"><a name="l00459"></a><span class="lineno"> 459</span>&#160; }</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>&#160; timer = millis();</div> <div class="line"><a name="l00460"></a><span class="lineno"> 460</span>&#160; }</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>&#160;}</div> <div class="line"><a name="l00461"></a><span class="lineno"> 461</span>&#160;</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>&#160;</div> <div class="line"><a name="l00462"></a><span class="lineno"> 462</span>&#160; <span class="comment">// Force a rekey after every request.</span></div>
<div class="line"><a name="l00495"></a><span class="lineno"><a class="line" href="classRNGClass.html#a8cb91e39f0c4591de5bf98b1e2880b13"> 495</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a8cb91e39f0c4591de5bf98b1e2880b13">RNGClass::loop</a>()</div> <div class="line"><a name="l00463"></a><span class="lineno"> 463</span>&#160; rekey();</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>&#160;{</div> <div class="line"><a name="l00464"></a><span class="lineno"> 464</span>&#160;}</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>&#160; <span class="comment">// Stir in the entropy from all registered noise sources.</span></div> <div class="line"><a name="l00465"></a><span class="lineno"> 465</span>&#160;</div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>&#160; <span class="keywordflow">for</span> (uint8_t posn = 0; posn &lt; count; ++posn)</div> <div class="line"><a name="l00505"></a><span class="lineno"><a class="line" href="classRNGClass.html#a49e3231ba65a5e4b045bc90976e0a659"> 505</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classRNGClass.html#a49e3231ba65a5e4b045bc90976e0a659">RNGClass::available</a>(<span class="keywordtype">size_t</span> len)<span class="keyword"> const</span></div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>&#160; noiseSources[posn]-&gt;<a class="code" href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">stir</a>();</div> <div class="line"><a name="l00506"></a><span class="lineno"> 506</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>&#160;</div> <div class="line"><a name="l00507"></a><span class="lineno"> 507</span>&#160; <span class="keywordflow">if</span> (len &gt;= (RNG_MAX_CREDITS / 8))</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>&#160; <span class="comment">// Save the seed if the auto-save timer has expired.</span></div> <div class="line"><a name="l00508"></a><span class="lineno"> 508</span>&#160; <span class="keywordflow">return</span> credits &gt;= RNG_MAX_CREDITS;</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>&#160; <span class="keywordflow">if</span> ((millis() - timer) &gt;= timeout)</div> <div class="line"><a name="l00509"></a><span class="lineno"> 509</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>&#160; <a class="code" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">save</a>();</div> <div class="line"><a name="l00510"></a><span class="lineno"> 510</span>&#160; <span class="keywordflow">return</span> len &lt;= (credits / 8);</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>&#160;}</div> <div class="line"><a name="l00511"></a><span class="lineno"> 511</span>&#160;}</div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>&#160;</div> <div class="line"><a name="l00512"></a><span class="lineno"> 512</span>&#160;</div>
<div class="line"><a name="l00525"></a><span class="lineno"><a class="line" href="classRNGClass.html#a9901367d86f2303a59bbc12fe91cad00"> 525</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a9901367d86f2303a59bbc12fe91cad00">RNGClass::destroy</a>()</div> <div class="line"><a name="l00538"></a><span class="lineno"><a class="line" href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02"> 538</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">RNGClass::stir</a>(<span class="keyword">const</span> uint8_t *data, <span class="keywordtype">size_t</span> len, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> credit)</div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>&#160;{</div> <div class="line"><a name="l00539"></a><span class="lineno"> 539</span>&#160;{</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>&#160; clean(block);</div> <div class="line"><a name="l00540"></a><span class="lineno"> 540</span>&#160; <span class="comment">// Increase the entropy credit.</span></div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>&#160; clean(stream);</div> <div class="line"><a name="l00541"></a><span class="lineno"> 541</span>&#160; <span class="keywordflow">if</span> ((credit / 8) &gt;= len)</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> posn = 0; posn &lt; <a class="code" href="classRNGClass.html#ae3a013bfc73795fd26ee36e70d89f4c2">SEED_SIZE</a>; ++posn)</div> <div class="line"><a name="l00542"></a><span class="lineno"> 542</span>&#160; credit = len * 8;</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>&#160; eeprom_write_byte((uint8_t *)(address + posn), 0xFF);</div> <div class="line"><a name="l00543"></a><span class="lineno"> 543</span>&#160; <span class="keywordflow">if</span> ((RNG_MAX_CREDITS - credits) &gt; credit)</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>&#160;}</div> <div class="line"><a name="l00544"></a><span class="lineno"> 544</span>&#160; credits += credit;</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>&#160;</div> <div class="line"><a name="l00545"></a><span class="lineno"> 545</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>&#160;<span class="keywordtype">void</span> RNGClass::rekey()</div> <div class="line"><a name="l00546"></a><span class="lineno"> 546</span>&#160; credits = RNG_MAX_CREDITS;</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>&#160;{</div> <div class="line"><a name="l00547"></a><span class="lineno"> 547</span>&#160;</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>&#160; <span class="comment">// Rekey the cipher for the next request by generating a new block.</span></div> <div class="line"><a name="l00548"></a><span class="lineno"> 548</span>&#160; <span class="comment">// Process the supplied input data.</span></div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>&#160; <span class="comment">// This is intended to make it difficult to wind the random number</span></div> <div class="line"><a name="l00549"></a><span class="lineno"> 549</span>&#160; <span class="keywordflow">if</span> (len &gt; 0) {</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>&#160; <span class="comment">// backwards if the state is captured later. The first 16 bytes of</span></div> <div class="line"><a name="l00550"></a><span class="lineno"> 550</span>&#160; <span class="comment">// XOR the data with the ChaCha input block in 48 byte</span></div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>&#160; <span class="comment">// &quot;block&quot; remain set to &quot;tagRNG&quot;.</span></div> <div class="line"><a name="l00551"></a><span class="lineno"> 551</span>&#160; <span class="comment">// chunks and rekey the ChaCha cipher for each chunk to mix</span></div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>&#160; ++(block[12]);</div> <div class="line"><a name="l00552"></a><span class="lineno"> 552</span>&#160; <span class="comment">// the data in. This should scatter any &quot;true entropy&quot; in</span></div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>&#160; <a class="code" href="classChaCha.html#a41ac3262e52ff49dcd916d0b3b2e2038">ChaCha::hashCore</a>(stream, block, RNG_ROUNDS);</div> <div class="line"><a name="l00553"></a><span class="lineno"> 553</span>&#160; <span class="comment">// the input across the entire block.</span></div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>&#160; memcpy(block + 4, stream, 48);</div> <div class="line"><a name="l00554"></a><span class="lineno"> 554</span>&#160; <span class="keywordflow">while</span> (len &gt; 0) {</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>&#160;</div> <div class="line"><a name="l00555"></a><span class="lineno"> 555</span>&#160; <span class="keywordtype">size_t</span> templen = len;</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>&#160; <span class="comment">// Permute the high word of the counter using the system microsecond</span></div> <div class="line"><a name="l00556"></a><span class="lineno"> 556</span>&#160; <span class="keywordflow">if</span> (templen &gt; 48)</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>&#160; <span class="comment">// counter to introduce a little bit of non-stir randomness for each</span></div> <div class="line"><a name="l00557"></a><span class="lineno"> 557</span>&#160; templen = 48;</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>&#160; <span class="comment">// request. Note: If random data is requested on a predictable schedule</span></div> <div class="line"><a name="l00558"></a><span class="lineno"> 558</span>&#160; uint8_t *output = ((uint8_t *)block) + 16;</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>&#160; <span class="comment">// then this may not help very much. It is still necessary to stir in</span></div> <div class="line"><a name="l00559"></a><span class="lineno"> 559</span>&#160; len -= templen;</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>&#160; <span class="comment">// high quality entropy data on a regular basis using stir().</span></div> <div class="line"><a name="l00560"></a><span class="lineno"> 560</span>&#160; <span class="keywordflow">while</span> (templen &gt; 0) {</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>&#160; block[13] ^= micros();</div> <div class="line"><a name="l00561"></a><span class="lineno"> 561</span>&#160; *output++ ^= *data++;</div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>&#160;}</div> <div class="line"><a name="l00562"></a><span class="lineno"> 562</span>&#160; --templen;</div>
<div class="ttc" id="classRNGClass_html_a139584fb249148e2058d1d645d090db7"><div class="ttname"><a href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">RNGClass::save</a></div><div class="ttdeci">void save()</div><div class="ttdoc">Saves the random seed to EEPROM. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00477">RNG.cpp:477</a></div></div> <div class="line"><a name="l00563"></a><span class="lineno"> 563</span>&#160; }</div>
<div class="ttc" id="classRNGClass_html_a418a833cf18198fd7e5d6dbd78c99c29"><div class="ttname"><a href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29">RNGClass::rand</a></div><div class="ttdeci">void rand(uint8_t *data, size_t len)</div><div class="ttdoc">Generates random bytes into a caller-supplied buffer. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00298">RNG.cpp:298</a></div></div> <div class="line"><a name="l00564"></a><span class="lineno"> 564</span>&#160; rekey();</div>
<div class="ttc" id="classRNGClass_html_a7f1aab3c324f8e8a424d683425e0fcf8"><div class="ttname"><a href="classRNGClass.html#a7f1aab3c324f8e8a424d683425e0fcf8">RNGClass::begin</a></div><div class="ttdeci">void begin(const char *tag, int eepromAddress)</div><div class="ttdoc">Initializes the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00202">RNG.cpp:202</a></div></div> <div class="line"><a name="l00565"></a><span class="lineno"> 565</span>&#160; }</div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>&#160; <span class="comment">// There was no input data, so just force a rekey so we</span></div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>&#160; <span class="comment">// get some mixing of the state even without new data.</span></div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>&#160; rekey();</div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>&#160; }</div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>&#160;</div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>&#160; <span class="comment">// Save if this is the first time we have reached max entropy.</span></div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>&#160; <span class="comment">// This provides some protection if the system is powered off before</span></div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>&#160; <span class="comment">// the first auto-save timeout occurs.</span></div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>&#160; <span class="keywordflow">if</span> (firstSave &amp;&amp; credits &gt;= RNG_MAX_CREDITS) {</div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>&#160; firstSave = 0;</div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>&#160; <a class="code" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">save</a>();</div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>&#160; }</div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>&#160;}</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>&#160;</div>
<div class="line"><a name="l00607"></a><span class="lineno"><a class="line" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7"> 607</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">RNGClass::save</a>()</div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>&#160;{</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>&#160; <span class="comment">// Generate random data from the current state and save</span></div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>&#160; <span class="comment">// that as the seed. Then force a rekey.</span></div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>&#160; ++(block[12]);</div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>&#160; <a class="code" href="classChaCha.html#a41ac3262e52ff49dcd916d0b3b2e2038">ChaCha::hashCore</a>(stream, block, RNG_ROUNDS);</div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>&#160;<span class="preprocessor">#if defined(RNG_EEPROM)</span></div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>&#160;<span class="preprocessor"></span> eeprom_write_block(stream, (<span class="keywordtype">void</span> *)(address + 1), 48);</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>&#160; eeprom_update_byte((uint8_t *)address, <span class="charliteral">&#39;S&#39;</span>);</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>&#160;<span class="preprocessor">#elif defined(RNG_DUE_TRNG)</span></div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>&#160;<span class="preprocessor"></span> <span class="keywordtype">unsigned</span> posn;</div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span>&#160; ((uint32_t *)(RNG_SEED_ADDR))[0] = <span class="charliteral">&#39;S&#39;</span>;</div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>&#160; <span class="keywordflow">for</span> (posn = 0; posn &lt; 12; ++posn)</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>&#160; ((uint32_t *)(RNG_SEED_ADDR))[posn + 1] = stream[posn];</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>&#160; <span class="keywordflow">for</span> (posn = 13; posn &lt; (RNG_FLASH_PAGE_SIZE / 4); ++posn)</div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>&#160; ((uint32_t *)(RNG_SEED_ADDR))[posn + 13] = 0xFFFFFFFF;</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>&#160; eraseAndWriteSeed();</div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>&#160;<span class="preprocessor"></span> rekey();</div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span>&#160; timer = millis();</div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>&#160;}</div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>&#160;</div>
<div class="line"><a name="l00635"></a><span class="lineno"><a class="line" href="classRNGClass.html#a8cb91e39f0c4591de5bf98b1e2880b13"> 635</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a8cb91e39f0c4591de5bf98b1e2880b13">RNGClass::loop</a>()</div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>&#160;{</div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>&#160; <span class="comment">// Stir in the entropy from all registered noise sources.</span></div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>&#160; <span class="keywordflow">for</span> (uint8_t posn = 0; posn &lt; count; ++posn)</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>&#160; noiseSources[posn]-&gt;<a class="code" href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">stir</a>();</div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>&#160;</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>&#160;<span class="preprocessor">#if defined(RNG_DUE_TRNG)</span></div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>&#160;<span class="preprocessor"></span> <span class="comment">// If there is data available from the Arudino Due&#39;s TRNG, then XOR</span></div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>&#160; <span class="comment">// it with the state block and increase the entropy credit. We don&#39;t</span></div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>&#160; <span class="comment">// call stir() yet because that will seriously slow down the system</span></div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>&#160; <span class="comment">// given how fast the TRNG is. Instead we save up the XOR&#39;ed TRNG</span></div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>&#160; <span class="comment">// data until the next rand() call and then hash it to generate the</span></div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>&#160; <span class="comment">// desired output.</span></div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>&#160; <span class="comment">// The CPU documentation claims that the TRNG output is very good so</span></div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>&#160; <span class="comment">// this should only make the pool more and more random as time goes on.</span></div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>&#160; <span class="comment">// However there is a risk that the CPU manufacturer was pressured by</span></div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>&#160; <span class="comment">// government or intelligence agencies to insert a back door that</span></div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>&#160; <span class="comment">// generates predictable output. Or the manufacturer was overly</span></div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>&#160; <span class="comment">// optimistic about their TRNG design and it is actually flawed in a</span></div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>&#160; <span class="comment">// way they don&#39;t realise.</span></div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>&#160; <span class="comment">// If you are concerned about such threats, then make sure to mix in</span></div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>&#160; <span class="comment">// data from other noise sources. By hashing together the TRNG with</span></div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>&#160; <span class="comment">// the other noise data, rand() should produce unpredictable data even</span></div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>&#160; <span class="comment">// if one of the sources is actually predictable.</span></div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>&#160; <span class="keywordflow">if</span> ((REG_TRNG_ISR &amp; TRNG_ISR_DATRDY) != 0) {</div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>&#160; block[4 + trngPosn] ^= REG_TRNG_ODATA;</div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>&#160; <span class="keywordflow">if</span> (++trngPosn &gt;= 12)</div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>&#160; trngPosn = 0;</div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>&#160; <span class="keywordflow">if</span> (credits &lt; RNG_MAX_CREDITS) {</div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>&#160; <span class="comment">// Credit 1 bit of entropy for the word. The TRNG should be</span></div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>&#160; <span class="comment">// better than this but it is so fast that we want to collect</span></div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>&#160; <span class="comment">// up more data before passing it to the application.</span></div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>&#160; ++credits;</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>&#160; }</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>&#160; }</div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>&#160; <span class="comment">// Save the seed if the auto-save timer has expired.</span></div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>&#160; <span class="keywordflow">if</span> ((millis() - timer) &gt;= timeout)</div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>&#160; <a class="code" href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">save</a>();</div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>&#160;}</div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>&#160;</div>
<div class="line"><a name="l00698"></a><span class="lineno"><a class="line" href="classRNGClass.html#a9901367d86f2303a59bbc12fe91cad00"> 698</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classRNGClass.html#a9901367d86f2303a59bbc12fe91cad00">RNGClass::destroy</a>()</div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>&#160;{</div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>&#160; clean(block);</div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>&#160; clean(stream);</div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>&#160;<span class="preprocessor">#if defined(RNG_EEPROM)</span></div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>&#160;<span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> posn = 0; posn &lt; <a class="code" href="classRNGClass.html#ae3a013bfc73795fd26ee36e70d89f4c2">SEED_SIZE</a>; ++posn)</div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>&#160; eeprom_write_byte((uint8_t *)(address + posn), 0xFF);</div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>&#160;<span class="preprocessor">#elif defined(RNG_DUE_TRNG)</span></div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>&#160;<span class="preprocessor"></span> <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> posn = 0; posn &lt; (RNG_FLASH_PAGE_SIZE / 4); ++posn)</div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>&#160; ((uint32_t *)(RNG_SEED_ADDR))[posn] = 0xFFFFFFFF;</div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>&#160; eraseAndWriteSeed();</div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>&#160;<span class="preprocessor"></span>}</div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>&#160;</div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>&#160;<span class="keywordtype">void</span> RNGClass::rekey()</div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>&#160;{</div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span>&#160; <span class="comment">// Rekey the cipher for the next request by generating a new block.</span></div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span>&#160; <span class="comment">// This is intended to make it difficult to wind the random number</span></div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span>&#160; <span class="comment">// backwards if the state is captured later. The first 16 bytes of</span></div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>&#160; <span class="comment">// &quot;block&quot; remain set to &quot;tagRNG&quot;.</span></div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>&#160; ++(block[12]);</div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>&#160; <a class="code" href="classChaCha.html#a41ac3262e52ff49dcd916d0b3b2e2038">ChaCha::hashCore</a>(stream, block, RNG_ROUNDS);</div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>&#160; memcpy(block + 4, stream, 48);</div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>&#160;</div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span>&#160; <span class="comment">// Permute the high word of the counter using the system microsecond</span></div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>&#160; <span class="comment">// counter to introduce a little bit of non-stir randomness for each</span></div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>&#160; <span class="comment">// request. Note: If random data is requested on a predictable schedule</span></div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>&#160; <span class="comment">// then this may not help very much. It is still necessary to stir in</span></div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>&#160; <span class="comment">// high quality entropy data on a regular basis using stir().</span></div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>&#160; block[13] ^= micros();</div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>&#160;}</div>
<div class="ttc" id="classRNGClass_html_a139584fb249148e2058d1d645d090db7"><div class="ttname"><a href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">RNGClass::save</a></div><div class="ttdeci">void save()</div><div class="ttdoc">Saves the random seed to EEPROM. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00607">RNG.cpp:607</a></div></div>
<div class="ttc" id="classRNGClass_html_a418a833cf18198fd7e5d6dbd78c99c29"><div class="ttname"><a href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29">RNGClass::rand</a></div><div class="ttdeci">void rand(uint8_t *data, size_t len)</div><div class="ttdoc">Generates random bytes into a caller-supplied buffer. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00428">RNG.cpp:428</a></div></div>
<div class="ttc" id="classRNGClass_html_a7f1aab3c324f8e8a424d683425e0fcf8"><div class="ttname"><a href="classRNGClass.html#a7f1aab3c324f8e8a424d683425e0fcf8">RNGClass::begin</a></div><div class="ttdeci">void begin(const char *tag, int eepromAddress)</div><div class="ttdoc">Initializes the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00296">RNG.cpp:296</a></div></div>
<div class="ttc" id="classNoiseSource_html"><div class="ttname"><a href="classNoiseSource.html">NoiseSource</a></div><div class="ttdoc">Abstract base class for random noise sources. </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8h_source.html#l00029">NoiseSource.h:29</a></div></div> <div class="ttc" id="classNoiseSource_html"><div class="ttname"><a href="classNoiseSource.html">NoiseSource</a></div><div class="ttdoc">Abstract base class for random noise sources. </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8h_source.html#l00029">NoiseSource.h:29</a></div></div>
<div class="ttc" id="classRNGClass_html_aef3ee2fb14a39caf650dc90a0226dd31"><div class="ttname"><a href="classRNGClass.html#aef3ee2fb14a39caf650dc90a0226dd31">RNGClass::~RNGClass</a></div><div class="ttdeci">~RNGClass()</div><div class="ttdoc">Destroys this random number generator instance. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00180">RNG.cpp:180</a></div></div> <div class="ttc" id="classRNGClass_html_aef3ee2fb14a39caf650dc90a0226dd31"><div class="ttname"><a href="classRNGClass.html#aef3ee2fb14a39caf650dc90a0226dd31">RNGClass::~RNGClass</a></div><div class="ttdeci">~RNGClass()</div><div class="ttdoc">Destroys this random number generator instance. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00196">RNG.cpp:196</a></div></div>
<div class="ttc" id="classNoiseSource_html_a48d0efabd71ff6e557a0898be79c49ba"><div class="ttname"><a href="classNoiseSource.html#a48d0efabd71ff6e557a0898be79c49ba">NoiseSource::added</a></div><div class="ttdeci">virtual void added()</div><div class="ttdoc">Called when the noise source is added to RNG with RNG.addNoiseSource(). </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8cpp_source.html#l00095">NoiseSource.cpp:95</a></div></div> <div class="ttc" id="classNoiseSource_html_a48d0efabd71ff6e557a0898be79c49ba"><div class="ttname"><a href="classNoiseSource.html#a48d0efabd71ff6e557a0898be79c49ba">NoiseSource::added</a></div><div class="ttdeci">virtual void added()</div><div class="ttdoc">Called when the noise source is added to RNG with RNG.addNoiseSource(). </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8cpp_source.html#l00095">NoiseSource.cpp:95</a></div></div>
<div class="ttc" id="classRNGClass_html_aacf23b192b0e4cc8726d9abe05f5a9db"><div class="ttname"><a href="classRNGClass.html#aacf23b192b0e4cc8726d9abe05f5a9db">RNGClass::addNoiseSource</a></div><div class="ttdeci">void addNoiseSource(NoiseSource &amp;source)</div><div class="ttdoc">Adds a noise source to the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00249">RNG.cpp:249</a></div></div> <div class="ttc" id="classRNGClass_html_aacf23b192b0e4cc8726d9abe05f5a9db"><div class="ttname"><a href="classRNGClass.html#aacf23b192b0e4cc8726d9abe05f5a9db">RNGClass::addNoiseSource</a></div><div class="ttdeci">void addNoiseSource(NoiseSource &amp;source)</div><div class="ttdoc">Adds a noise source to the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00379">RNG.cpp:379</a></div></div>
<div class="ttc" id="classRNGClass_html_acbcf327242f51ae2d9209aeaa45e30e9"><div class="ttname"><a href="classRNGClass.html#acbcf327242f51ae2d9209aeaa45e30e9">RNGClass::RNGClass</a></div><div class="ttdeci">RNGClass()</div><div class="ttdoc">Constructs a new random number generator instance. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00167">RNG.cpp:167</a></div></div> <div class="ttc" id="classRNGClass_html_acbcf327242f51ae2d9209aeaa45e30e9"><div class="ttname"><a href="classRNGClass.html#acbcf327242f51ae2d9209aeaa45e30e9">RNGClass::RNGClass</a></div><div class="ttdeci">RNGClass()</div><div class="ttdoc">Constructs a new random number generator instance. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00182">RNG.cpp:182</a></div></div>
<div class="ttc" id="classRNGClass_html_a9901367d86f2303a59bbc12fe91cad00"><div class="ttname"><a href="classRNGClass.html#a9901367d86f2303a59bbc12fe91cad00">RNGClass::destroy</a></div><div class="ttdeci">void destroy()</div><div class="ttdoc">Destroys the data in the random number pool and the saved seed in EEPROM. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00525">RNG.cpp:525</a></div></div> <div class="ttc" id="classRNGClass_html_a9901367d86f2303a59bbc12fe91cad00"><div class="ttname"><a href="classRNGClass.html#a9901367d86f2303a59bbc12fe91cad00">RNGClass::destroy</a></div><div class="ttdeci">void destroy()</div><div class="ttdoc">Destroys the data in the random number pool and the saved seed in EEPROM. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00698">RNG.cpp:698</a></div></div>
<div class="ttc" id="classRNGClass_html_a49e3231ba65a5e4b045bc90976e0a659"><div class="ttname"><a href="classRNGClass.html#a49e3231ba65a5e4b045bc90976e0a659">RNGClass::available</a></div><div class="ttdeci">bool available(size_t len) const </div><div class="ttdoc">Determine if there is sufficient entropy available for a specific request size. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00375">RNG.cpp:375</a></div></div> <div class="ttc" id="classRNGClass_html_a49e3231ba65a5e4b045bc90976e0a659"><div class="ttname"><a href="classRNGClass.html#a49e3231ba65a5e4b045bc90976e0a659">RNGClass::available</a></div><div class="ttdeci">bool available(size_t len) const </div><div class="ttdoc">Determine if there is sufficient entropy available for a specific request size. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00505">RNG.cpp:505</a></div></div>
<div class="ttc" id="classRNGClass_html_a8cb91e39f0c4591de5bf98b1e2880b13"><div class="ttname"><a href="classRNGClass.html#a8cb91e39f0c4591de5bf98b1e2880b13">RNGClass::loop</a></div><div class="ttdeci">void loop()</div><div class="ttdoc">Run periodic housekeeping tasks on the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00495">RNG.cpp:495</a></div></div> <div class="ttc" id="classRNGClass_html_a8cb91e39f0c4591de5bf98b1e2880b13"><div class="ttname"><a href="classRNGClass.html#a8cb91e39f0c4591de5bf98b1e2880b13">RNGClass::loop</a></div><div class="ttdeci">void loop()</div><div class="ttdoc">Run periodic housekeeping tasks on the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00635">RNG.cpp:635</a></div></div>
<div class="ttc" id="classRNGClass_html"><div class="ttname"><a href="classRNGClass.html">RNGClass</a></div><div class="ttdoc">Pseudo random number generator suitable for cryptography. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8h_source.html#l00031">RNG.h:31</a></div></div> <div class="ttc" id="classRNGClass_html"><div class="ttname"><a href="classRNGClass.html">RNGClass</a></div><div class="ttdoc">Pseudo random number generator suitable for cryptography. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8h_source.html#l00031">RNG.h:31</a></div></div>
<div class="ttc" id="classRNGClass_html_ae3a013bfc73795fd26ee36e70d89f4c2"><div class="ttname"><a href="classRNGClass.html#ae3a013bfc73795fd26ee36e70d89f4c2">RNGClass::SEED_SIZE</a></div><div class="ttdeci">static const int SEED_SIZE</div><div class="ttdoc">Size of a saved random number seed in EEPROM space. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8h_source.html#l00053">RNG.h:53</a></div></div> <div class="ttc" id="classRNGClass_html_ae3a013bfc73795fd26ee36e70d89f4c2"><div class="ttname"><a href="classRNGClass.html#ae3a013bfc73795fd26ee36e70d89f4c2">RNGClass::SEED_SIZE</a></div><div class="ttdeci">static const int SEED_SIZE</div><div class="ttdoc">Size of a saved random number seed in EEPROM space. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8h_source.html#l00053">RNG.h:53</a></div></div>
<div class="ttc" id="classChaCha_html_a41ac3262e52ff49dcd916d0b3b2e2038"><div class="ttname"><a href="classChaCha.html#a41ac3262e52ff49dcd916d0b3b2e2038">ChaCha::hashCore</a></div><div class="ttdeci">static void hashCore(uint32_t *output, const uint32_t *input, uint8_t rounds)</div><div class="ttdoc">Executes the ChaCha hash core on an input memory block. </div><div class="ttdef"><b>Definition:</b> <a href="ChaCha_8cpp_source.html#l00253">ChaCha.cpp:253</a></div></div> <div class="ttc" id="classChaCha_html_a41ac3262e52ff49dcd916d0b3b2e2038"><div class="ttname"><a href="classChaCha.html#a41ac3262e52ff49dcd916d0b3b2e2038">ChaCha::hashCore</a></div><div class="ttdeci">static void hashCore(uint32_t *output, const uint32_t *input, uint8_t rounds)</div><div class="ttdoc">Executes the ChaCha hash core on an input memory block. </div><div class="ttdef"><b>Definition:</b> <a href="ChaCha_8cpp_source.html#l00253">ChaCha.cpp:253</a></div></div>
<div class="ttc" id="classRNGClass_html_ad99535ea23ae2fec55bdebb8c24def02"><div class="ttname"><a href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">RNGClass::stir</a></div><div class="ttdeci">void stir(const uint8_t *data, size_t len, unsigned int credit=0)</div><div class="ttdoc">Stirs additional entropy data into the random pool. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00408">RNG.cpp:408</a></div></div> <div class="ttc" id="classRNGClass_html_ad99535ea23ae2fec55bdebb8c24def02"><div class="ttname"><a href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">RNGClass::stir</a></div><div class="ttdeci">void stir(const uint8_t *data, size_t len, unsigned int credit=0)</div><div class="ttdoc">Stirs additional entropy data into the random pool. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00538">RNG.cpp:538</a></div></div>
<div class="ttc" id="classRNGClass_html_a5848e87a5f2f0302c88b0377f0e3366d"><div class="ttname"><a href="classRNGClass.html#a5848e87a5f2f0302c88b0377f0e3366d">RNGClass::setAutoSaveTime</a></div><div class="ttdeci">void setAutoSaveTime(uint16_t minutes)</div><div class="ttdoc">Sets the amount of time between automatic seed saves. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00274">RNG.cpp:274</a></div></div> <div class="ttc" id="classRNGClass_html_a5848e87a5f2f0302c88b0377f0e3366d"><div class="ttname"><a href="classRNGClass.html#a5848e87a5f2f0302c88b0377f0e3366d">RNGClass::setAutoSaveTime</a></div><div class="ttdeci">void setAutoSaveTime(uint16_t minutes)</div><div class="ttdoc">Sets the amount of time between automatic seed saves. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00404">RNG.cpp:404</a></div></div>
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@ -152,31 +152,32 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> timeout;</div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> timeout;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <a class="code" href="classNoiseSource.html">NoiseSource</a> *noiseSources[4];</div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <a class="code" href="classNoiseSource.html">NoiseSource</a> *noiseSources[4];</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; uint8_t count;</div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; uint8_t count;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;</div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; uint8_t trngPosn;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keywordtype">void</span> rekey();</div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;};</div> <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keywordtype">void</span> rekey();</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;</div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;};</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="keyword">extern</span> <a class="code" href="classRNGClass.html">RNGClass</a> RNG;</div> <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;</div> <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;<span class="keyword">extern</span> <a class="code" href="classRNGClass.html">RNGClass</a> RNG;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;<span class="preprocessor">#endif</span></div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;</div>
<div class="ttc" id="classRNGClass_html_a139584fb249148e2058d1d645d090db7"><div class="ttname"><a href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">RNGClass::save</a></div><div class="ttdeci">void save()</div><div class="ttdoc">Saves the random seed to EEPROM. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00477">RNG.cpp:477</a></div></div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="classRNGClass_html_a418a833cf18198fd7e5d6dbd78c99c29"><div class="ttname"><a href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29">RNGClass::rand</a></div><div class="ttdeci">void rand(uint8_t *data, size_t len)</div><div class="ttdoc">Generates random bytes into a caller-supplied buffer. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00298">RNG.cpp:298</a></div></div> <div class="ttc" id="classRNGClass_html_a139584fb249148e2058d1d645d090db7"><div class="ttname"><a href="classRNGClass.html#a139584fb249148e2058d1d645d090db7">RNGClass::save</a></div><div class="ttdeci">void save()</div><div class="ttdoc">Saves the random seed to EEPROM. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00607">RNG.cpp:607</a></div></div>
<div class="ttc" id="classRNGClass_html_a7f1aab3c324f8e8a424d683425e0fcf8"><div class="ttname"><a href="classRNGClass.html#a7f1aab3c324f8e8a424d683425e0fcf8">RNGClass::begin</a></div><div class="ttdeci">void begin(const char *tag, int eepromAddress)</div><div class="ttdoc">Initializes the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00202">RNG.cpp:202</a></div></div> <div class="ttc" id="classRNGClass_html_a418a833cf18198fd7e5d6dbd78c99c29"><div class="ttname"><a href="classRNGClass.html#a418a833cf18198fd7e5d6dbd78c99c29">RNGClass::rand</a></div><div class="ttdeci">void rand(uint8_t *data, size_t len)</div><div class="ttdoc">Generates random bytes into a caller-supplied buffer. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00428">RNG.cpp:428</a></div></div>
<div class="ttc" id="classRNGClass_html_a7f1aab3c324f8e8a424d683425e0fcf8"><div class="ttname"><a href="classRNGClass.html#a7f1aab3c324f8e8a424d683425e0fcf8">RNGClass::begin</a></div><div class="ttdeci">void begin(const char *tag, int eepromAddress)</div><div class="ttdoc">Initializes the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00296">RNG.cpp:296</a></div></div>
<div class="ttc" id="classNoiseSource_html"><div class="ttname"><a href="classNoiseSource.html">NoiseSource</a></div><div class="ttdoc">Abstract base class for random noise sources. </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8h_source.html#l00029">NoiseSource.h:29</a></div></div> <div class="ttc" id="classNoiseSource_html"><div class="ttname"><a href="classNoiseSource.html">NoiseSource</a></div><div class="ttdoc">Abstract base class for random noise sources. </div><div class="ttdef"><b>Definition:</b> <a href="NoiseSource_8h_source.html#l00029">NoiseSource.h:29</a></div></div>
<div class="ttc" id="classRNGClass_html_aef3ee2fb14a39caf650dc90a0226dd31"><div class="ttname"><a href="classRNGClass.html#aef3ee2fb14a39caf650dc90a0226dd31">RNGClass::~RNGClass</a></div><div class="ttdeci">~RNGClass()</div><div class="ttdoc">Destroys this random number generator instance. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00180">RNG.cpp:180</a></div></div> <div class="ttc" id="classRNGClass_html_aef3ee2fb14a39caf650dc90a0226dd31"><div class="ttname"><a href="classRNGClass.html#aef3ee2fb14a39caf650dc90a0226dd31">RNGClass::~RNGClass</a></div><div class="ttdeci">~RNGClass()</div><div class="ttdoc">Destroys this random number generator instance. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00196">RNG.cpp:196</a></div></div>
<div class="ttc" id="classRNGClass_html_aacf23b192b0e4cc8726d9abe05f5a9db"><div class="ttname"><a href="classRNGClass.html#aacf23b192b0e4cc8726d9abe05f5a9db">RNGClass::addNoiseSource</a></div><div class="ttdeci">void addNoiseSource(NoiseSource &amp;source)</div><div class="ttdoc">Adds a noise source to the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00249">RNG.cpp:249</a></div></div> <div class="ttc" id="classRNGClass_html_aacf23b192b0e4cc8726d9abe05f5a9db"><div class="ttname"><a href="classRNGClass.html#aacf23b192b0e4cc8726d9abe05f5a9db">RNGClass::addNoiseSource</a></div><div class="ttdeci">void addNoiseSource(NoiseSource &amp;source)</div><div class="ttdoc">Adds a noise source to the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00379">RNG.cpp:379</a></div></div>
<div class="ttc" id="classRNGClass_html_acbcf327242f51ae2d9209aeaa45e30e9"><div class="ttname"><a href="classRNGClass.html#acbcf327242f51ae2d9209aeaa45e30e9">RNGClass::RNGClass</a></div><div class="ttdeci">RNGClass()</div><div class="ttdoc">Constructs a new random number generator instance. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00167">RNG.cpp:167</a></div></div> <div class="ttc" id="classRNGClass_html_acbcf327242f51ae2d9209aeaa45e30e9"><div class="ttname"><a href="classRNGClass.html#acbcf327242f51ae2d9209aeaa45e30e9">RNGClass::RNGClass</a></div><div class="ttdeci">RNGClass()</div><div class="ttdoc">Constructs a new random number generator instance. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00182">RNG.cpp:182</a></div></div>
<div class="ttc" id="classRNGClass_html_a9901367d86f2303a59bbc12fe91cad00"><div class="ttname"><a href="classRNGClass.html#a9901367d86f2303a59bbc12fe91cad00">RNGClass::destroy</a></div><div class="ttdeci">void destroy()</div><div class="ttdoc">Destroys the data in the random number pool and the saved seed in EEPROM. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00525">RNG.cpp:525</a></div></div> <div class="ttc" id="classRNGClass_html_a9901367d86f2303a59bbc12fe91cad00"><div class="ttname"><a href="classRNGClass.html#a9901367d86f2303a59bbc12fe91cad00">RNGClass::destroy</a></div><div class="ttdeci">void destroy()</div><div class="ttdoc">Destroys the data in the random number pool and the saved seed in EEPROM. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00698">RNG.cpp:698</a></div></div>
<div class="ttc" id="classRNGClass_html_a49e3231ba65a5e4b045bc90976e0a659"><div class="ttname"><a href="classRNGClass.html#a49e3231ba65a5e4b045bc90976e0a659">RNGClass::available</a></div><div class="ttdeci">bool available(size_t len) const </div><div class="ttdoc">Determine if there is sufficient entropy available for a specific request size. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00375">RNG.cpp:375</a></div></div> <div class="ttc" id="classRNGClass_html_a49e3231ba65a5e4b045bc90976e0a659"><div class="ttname"><a href="classRNGClass.html#a49e3231ba65a5e4b045bc90976e0a659">RNGClass::available</a></div><div class="ttdeci">bool available(size_t len) const </div><div class="ttdoc">Determine if there is sufficient entropy available for a specific request size. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00505">RNG.cpp:505</a></div></div>
<div class="ttc" id="classRNGClass_html_a8cb91e39f0c4591de5bf98b1e2880b13"><div class="ttname"><a href="classRNGClass.html#a8cb91e39f0c4591de5bf98b1e2880b13">RNGClass::loop</a></div><div class="ttdeci">void loop()</div><div class="ttdoc">Run periodic housekeeping tasks on the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00495">RNG.cpp:495</a></div></div> <div class="ttc" id="classRNGClass_html_a8cb91e39f0c4591de5bf98b1e2880b13"><div class="ttname"><a href="classRNGClass.html#a8cb91e39f0c4591de5bf98b1e2880b13">RNGClass::loop</a></div><div class="ttdeci">void loop()</div><div class="ttdoc">Run periodic housekeeping tasks on the random number generator. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00635">RNG.cpp:635</a></div></div>
<div class="ttc" id="classRNGClass_html"><div class="ttname"><a href="classRNGClass.html">RNGClass</a></div><div class="ttdoc">Pseudo random number generator suitable for cryptography. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8h_source.html#l00031">RNG.h:31</a></div></div> <div class="ttc" id="classRNGClass_html"><div class="ttname"><a href="classRNGClass.html">RNGClass</a></div><div class="ttdoc">Pseudo random number generator suitable for cryptography. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8h_source.html#l00031">RNG.h:31</a></div></div>
<div class="ttc" id="classRNGClass_html_ae3a013bfc73795fd26ee36e70d89f4c2"><div class="ttname"><a href="classRNGClass.html#ae3a013bfc73795fd26ee36e70d89f4c2">RNGClass::SEED_SIZE</a></div><div class="ttdeci">static const int SEED_SIZE</div><div class="ttdoc">Size of a saved random number seed in EEPROM space. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8h_source.html#l00053">RNG.h:53</a></div></div> <div class="ttc" id="classRNGClass_html_ae3a013bfc73795fd26ee36e70d89f4c2"><div class="ttname"><a href="classRNGClass.html#ae3a013bfc73795fd26ee36e70d89f4c2">RNGClass::SEED_SIZE</a></div><div class="ttdeci">static const int SEED_SIZE</div><div class="ttdoc">Size of a saved random number seed in EEPROM space. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8h_source.html#l00053">RNG.h:53</a></div></div>
<div class="ttc" id="classRNGClass_html_ad99535ea23ae2fec55bdebb8c24def02"><div class="ttname"><a href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">RNGClass::stir</a></div><div class="ttdeci">void stir(const uint8_t *data, size_t len, unsigned int credit=0)</div><div class="ttdoc">Stirs additional entropy data into the random pool. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00408">RNG.cpp:408</a></div></div> <div class="ttc" id="classRNGClass_html_ad99535ea23ae2fec55bdebb8c24def02"><div class="ttname"><a href="classRNGClass.html#ad99535ea23ae2fec55bdebb8c24def02">RNGClass::stir</a></div><div class="ttdeci">void stir(const uint8_t *data, size_t len, unsigned int credit=0)</div><div class="ttdoc">Stirs additional entropy data into the random pool. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00538">RNG.cpp:538</a></div></div>
<div class="ttc" id="classRNGClass_html_a5848e87a5f2f0302c88b0377f0e3366d"><div class="ttname"><a href="classRNGClass.html#a5848e87a5f2f0302c88b0377f0e3366d">RNGClass::setAutoSaveTime</a></div><div class="ttdeci">void setAutoSaveTime(uint16_t minutes)</div><div class="ttdoc">Sets the amount of time between automatic seed saves. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00274">RNG.cpp:274</a></div></div> <div class="ttc" id="classRNGClass_html_a5848e87a5f2f0302c88b0377f0e3366d"><div class="ttname"><a href="classRNGClass.html#a5848e87a5f2f0302c88b0377f0e3366d">RNGClass::setAutoSaveTime</a></div><div class="ttdeci">void setAutoSaveTime(uint16_t minutes)</div><div class="ttdoc">Sets the amount of time between automatic seed saves. </div><div class="ttdef"><b>Definition:</b> <a href="RNG_8cpp_source.html#l00404">RNG.cpp:404</a></div></div>
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