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6 commits

Author SHA1 Message Date
Daniel King b6897f67a4 Correct signedness of printf specifier in self tests 2018-05-24 13:37:31 +02:00
Daniel King dedf4a3e7b Adjust verbose self-test output to match other ciphers. 2018-05-24 13:37:31 +02:00
Daniel King a310c5e42b Allow some parameters to be NULL if the length is 0. 
This change permits users of the ChaCha20/Poly1305 algorithms
(and the AEAD construction thereof) to pass NULL pointers for
data that they do not need, and avoids the need to provide a valid
buffer for data that is not used.
 2018-05-24 13:37:31 +02:00
Daniel King b8025c5826 Implement AEAD-ChaCha20-Poly1305. 
This implementation is based off the description in RFC 7539.

The ChaCha20 code is also updated to provide a means of generating
keystream blocks with arbitrary counter values. This is used to
generated the one-time Poly1305 key in the AEAD construction.
 2018-05-24 13:37:31 +02:00
Daniel King bd92062269 Add ChaCha20 to the Cipher module 2018-05-24 13:37:31 +02:00
Daniel King 34b822ce7b Initial implementation of ChaCha20 2018-05-24 13:37:31 +02:00