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Improve RNG overview documentation

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Rhys Weatherley 2015-04-02 06:48:31 +10:00
parent 7432d83676
commit 86bec72f2f
1 changed files with 4 additions and 5 deletions
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doc/crypto-rng.dox
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@ -143,7 +143,7 @@ specified address to store the previous seed. When the system is started
next time, the previous saved seed is loaded and then deliberately next time, the previous saved seed is loaded and then deliberately
overwritten with a new seed. This ensures that the device will not overwritten with a new seed. This ensures that the device will not
accidentally generate the same sequence of random numbers if it is accidentally generate the same sequence of random numbers if it is
restarted before a new seed can be saved. restarted before the first automatic save of the seed.
By default the seed is saved once an hour, although this can be changed By default the seed is saved once an hour, although this can be changed
with \link RNGClass::setAutoSaveTime() RNG.setAutoSaveTime()\endlink. with \link RNGClass::setAutoSaveTime() RNG.setAutoSaveTime()\endlink.
@ -199,10 +199,9 @@ compromised).
In Linux terms we want the effect of the <tt>/dev/random</tt> device which In Linux terms we want the effect of the <tt>/dev/random</tt> device which
blocks until sufficient entropy is available to service the request. blocks until sufficient entropy is available to service the request.
Blocking isn't compatible with the Arduino way of doing things, Blocking isn't very friendly to other application tasks, so the library
so the library instead provides the instead provides the \link RNGClass::available() RNG.available()\endlink
\link RNGClass::available() RNG.available()\endlink function to poll function to poll how much entropy is in the global random number pool:
how much entropy is in the global random number pool:
\code \code
byte key[32]; byte key[32];