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BLAKE2b hash algorithm

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Rhys Weatherley
2015-03-14 08:47:03 +10:00
parent 72901a91f9
commit e10b398949
5 changed files with 505 additions and 7 deletions
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13
doc/crypto.dox
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@@ -29,14 +29,14 @@
\li Block ciphers: AES128, AES192, AES256
\li Block cipher modes: CTR, CFB, CBC, OFB
\li Stream ciphers: ChaCha
\li Hash algorithms: SHA1, SHA256, SHA512, BLAKE2s
\li Hash algorithms: SHA1, SHA256, SHA512, BLAKE2s, BLAKE2b
\li Public key algorithms: Curve25519
\li Random number generation: \link RNGClass RNG\endlink, TransistorNoiseSource
All cryptographic algorithms have been optimized for 8-bit Arduino platforms
like the Uno. Memory usage is also reduced, particularly for SHA1, SHA256,
and SHA512 which save 256, 192, and 512 bytes respectively over traditional
implementations. For other algorithms, static sbox tables and the like are
implementations. For all algorithms, static sbox tables and the like are
placed into program memory to further reduce data memory usage.
ChaCha with 20 rounds and 256-bit keys is the recommended
@@ -45,10 +45,10 @@ constant-time, and much more secure. AES128, AES192, and AES256 are
provided for use in applications where compatibility with other systems
is desirable.
BLAKE2s is a variation on the ChaCha stream cipher, designed for hashing,
with a 256-bit hash output. It is intended as a high performance drop-in
replacement for SHA256 for when speed is critical but exact SHA256
compatibility is not.
BLAKE2s and BLAKE2b are variations on the ChaCha stream cipher, designed for
hashing, with 256-bit and 512-bit hash outputs respectively. They are
intended as high performance replacements for SHA256 and SHA512 for when
speed is critical but exact bit-compatibility of hash values is not.
\section crypto_performance Performance
@@ -67,6 +67,7 @@ Ardunino Mega 2560 running at 16 MHz are similar:
<tr><td>SHA256</td><td align="right">43.85us</td><td> </td><td align="right"> </td><td align="right">106</td></tr>
<tr><td>SHA512</td><td align="right">123.25us</td><td> </td><td align="right"> </td><td align="right">210</td></tr>
<tr><td>BLAKE2s</td><td align="right">18.54us</td><td> </td><td align="right"> </td><td align="right">170</td></tr>
<tr><td>BLAKE2b</td><td align="right">50.59us</td><td> </td><td align="right"> </td><td align="right">338</td></tr>
</table>
Where a cipher supports more than one key size (such as ChaCha), the values

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doc/mainpage.dox
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@@ -93,7 +93,7 @@ realtime clock and the LCD library to implement an alarm clock.
\li Block ciphers: AES128, AES192, AES256
\li Block cipher modes: CTR, CFB, CBC, OFB
\li Stream ciphers: ChaCha
\li Hash algorithms: SHA1, SHA256, SHA512, BLAKE2s
\li Hash algorithms: SHA1, SHA256, SHA512, BLAKE2s, BLAKE2b
\li Public key algorithms: Curve25519
\li Random number generation: \link RNGClass RNG\endlink, TransistorNoiseSource