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11 commits

Author SHA1 Message Date
Manuel Pégourié-Gonnard a878d3b6e3 cmac: avoid useless wrapping of function 
probably a leftover from an earlier stage
 2016-10-13 13:51:09 +01:00
Manuel Pégourié-Gonnard 5f8639fea2 cmac: reduce visibility of macros 
The #undef is usefull for people who want to to amalgamated releases
 2016-10-13 13:51:09 +01:00
Manuel Pégourié-Gonnard 59ae4bad18 cmac: some more padding-related tune-ups 
- use one less temporary buffer
- pedantic: in_len + 15 was a potential overflow
- use a more explicit name instead of 'flag'
- Mn was a bit misleading
 2016-10-13 13:51:08 +01:00
Manuel Pégourié-Gonnard da8724fbc6 cmac: clean up padding function and comments 2016-10-13 13:51:08 +01:00
Manuel Pégourié-Gonnard 89b8d83723 cmac: make subkey gen more constant-time 
The previous version had secret-dependent memory accesses. While it was
probably not an issue in practice cause the two bytes of the array are
probably on the same cache line anyway, as a matter of principle this should
be avoided.
 2016-10-13 13:51:08 +01:00
Manuel Pégourié-Gonnard 28ea791521 cmac: zeroize sensitive intermediate values 2016-10-13 13:51:08 +01:00
Manuel Pégourié-Gonnard 756bcf7631 cmac: factor multiply by u to its own function 
We're doing exactly the same operation for K1 and K2.
 2016-10-13 13:51:08 +01:00
Manuel Pégourié-Gonnard a4dfa0550f cmac: fix whitespace/codingstyle issues 2016-10-13 13:51:08 +01:00
Manuel Pégourié-Gonnard 9c83eebe67 cmac: improve argument order and naming 
- always use the pattern "buffer, length"
- avoid using unqualified "length" as a name when there are more than one
 2016-10-13 13:51:08 +01:00
Robert Cragie 9bf1e5dd3b Line endings wrong 2016-10-13 13:51:08 +01:00
Robert Cragie 45feb6ef20 Add support for AES-128-CMAC and AES-CMAC-PRF-128 2016-10-13 13:51:07 +01:00