Manuel Pégourié-Gonnard
e7072f8d11
Fix theoretical compliance issue in ECDSA
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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
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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()
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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()
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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
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(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()
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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
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- 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
