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BLAKE2s hash function

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Rhys Weatherley
2015-01-04 15:49:16 +10:00
parent b7dc74b7c7
commit 91b3aa70e7
10 changed files with 490 additions and 17 deletions
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8
doc/crypto.dox
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@@ -29,7 +29,7 @@
\li Block ciphers: AES128, AES192, AES256
\li Block cipher modes: CTR, CFB, CBC, OFB
\li Stream ciphers: ChaCha, Arcfour
\li Hash algorithms: SHA1, SHA256
\li Hash algorithms: SHA1, SHA256, BLAKE2s
All cryptographic algorithms have been optimized for 8-bit Arduino platforms
like the Uno. Memory usage is also reduced, particularly for SHA1 and SHA256
@@ -43,6 +43,11 @@ constant-time, and much more secure. AES128, AES192, AES256, and Arcfour
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.
\section crypto_examples Examples
TBD
@@ -62,6 +67,7 @@ All figures are for the Arduino Uno running at 16 MHz:
<tr><td>ChaCha (8 rounds)</td><td align="right">8.13us</td><td align="right">8.14us</td><td align="right">43.74us</td><td align="right">130</td></tr>
<tr><td>SHA1</td><td align="right">21.90us</td><td> </td><td align="right"> </td><td align="right">94</td></tr>
<tr><td>SHA256</td><td align="right">43.85us</td><td> </td><td align="right"> </td><td align="right">106</td></tr>
<tr><td>BLAKE2s</td><td align="right">18.54us</td><td> </td><td align="right"> </td><td align="right">170</td></tr>
</table>
Where a cipher supports more than one key size (such as ChaCha and Arcfour),

2
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, Arcfour
\li Hash algorithms: SHA1, SHA256
\li Hash algorithms: SHA1, SHA256, BLAKE2s
More information can be found on the \ref crypto "Cryptographic Library" page.