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Author SHA1 Message Date
Manuel Pégourié-Gonnard 5304812b2d Fix theoretical compliance issue in ECDSA 
The issue would happen for curves whose bitlength is not a multiple of eight
(the only case is NIST P-521) with hashes that are longer than the bitlength
of the curve: since the wides hash is 512 bits long, this can't happen.
Fixing however as a matter of principle and readability.
 2014-01-17 21:41:39 +01:00
Manuel Pégourié-Gonnard 5e6edcfd96 Add fallback for md_alg == NONE to ecdsa_sign_det() 2014-01-07 16:19:28 +01:00
Manuel Pégourié-Gonnard 937340bce0 Add ecdsa_write_signature_det() 2014-01-06 15:29:03 +01:00
Manuel Pégourié-Gonnard f42bca6da0 Little HMAC_DRBG refactoring 2014-01-06 15:29:03 +01:00
Manuel Pégourié-Gonnard 4daaef7e27 Add ecdsa_sign_det() with test vectors 2014-01-06 15:29:03 +01:00
Manuel Pégourié-Gonnard 461d416892 Add minified HMAC_DRBG for deterministic ECDSA 2014-01-06 11:01:38 +01:00
Manuel Pégourié-Gonnard e7072f8d11 Fix theoretical compliance issue in ECDSA 
The issue would happen for curves whose bitlength is not a multiple of eight
(the only case is NIST P-521) with hashes that are longer than the bitlength
of the curve: since the wides hash is 512 bits long, this can't happen.
Fixing however as a matter of principle and readability.
 2014-01-06 11:01:38 +01:00
Manuel Pégourié-Gonnard 97871ef236 Some operations are not supported with Curve25519 2013-12-05 15:58:38 +01:00
Manuel Pégourié-Gonnard 178d9bac3c Fix ECDSA corner case: missing reduction mod N 
No security issue, can cause valid signatures to be rejected.

Reported by DualTachyon on github.
 2013-10-29 13:40:17 +01:00
Manuel Pégourié-Gonnard 1001e32d6f Fix return value of ecdsa_from_keypair() 2013-10-28 14:01:08 +01:00
Manuel Pégourié-Gonnard 161ef968db Cache pre-computed points for ecp_mul() 
Up to 1.25 speedup on ECDSA sign for small curves, but mainly useful as a
preparation for fixed-point mult (a few prototypes changed in constness).
 2013-09-18 15:37:44 +02:00
Manuel Pégourié-Gonnard 456d3b9b0b Make ECP error codes more specific 2013-09-18 14:35:53 +02:00
Manuel Pégourié-Gonnard 4cf0686d6d Remove spurious '+ 3' in ecdsa_write_signature() 2013-09-18 14:34:33 +02:00
Manuel Pégourié-Gonnard c75c56fef7 Fix off-by-one error in ecdsa_write_signature() 
Made some signature fail with 521-bit curve
 2013-09-02 16:25:37 +02:00
Manuel Pégourié-Gonnard e09d2f8261 Change ecp_mul() prototype to allow randomization 
(Also improve an error code while at it.)
 2013-09-02 14:29:09 +02:00
Manuel Pégourié-Gonnard db77175e99 Make ecdsa_verify() return value more explicit 2013-08-27 22:21:21 +02:00
Manuel Pégourié-Gonnard f499993cb2 Add ecdsa_from_keypair() 
Also fix bug/limitation in mpi_copy: would segfault if src just initialised
and not set to a value yet. (This case occurs when copying a context which
contains only the public part of the key, eg.)
 2013-08-20 20:46:03 +02:00
Manuel Pégourié-Gonnard 8eebd012b9 Add an ecdsa_genkey() function 2013-08-20 20:08:28 +02:00
Manuel Pégourié-Gonnard b694b4896c Add ecdsa_{read,write}_signature() 2013-08-20 20:04:16 +02:00
Manuel Pégourié-Gonnard 56a487a17f Minor ecdsa cleanups 
- point_format is of no use
- d was init'ed and free'd twice
 2013-08-16 14:00:52 +02:00
Paul Bakker cca998a4c5 Fixed memory leak in ecdsa_sign() / ecdsa_verify() in case of error 2013-07-26 14:22:16 +02:00
Manuel Pégourié-Gonnard 7c8934ea0e Add ecdsa_init and ecdsa_free 2013-07-08 15:30:23 +02:00
Manuel Pégourié-Gonnard 3aeb5a7192 Add ECDSA signature primitive. 2013-01-26 19:11:28 +01:00
Manuel Pégourié-Gonnard b309ab2936 Add ECDSA sign primitive 2013-01-26 19:11:28 +01:00
Manuel Pégourié-Gonnard 2aea1416f9 Add skeleton ecdsa.[ch] 2013-01-26 19:11:28 +01:00