diff options
| author | Werner Koch <wk@gnupg.org> | 2013-09-30 21:14:11 +0200 |
|---|---|---|
| committer | Werner Koch <wk@gnupg.org> | 2013-09-30 21:14:11 +0200 |
| commit | 1d85452412b65e7976bc94969fc513ff6b880ed8 (patch) | |
| tree | 288a8367d37f1a4b75785032a3db14d1fbd310ad /cipher/ecc-curves.c | |
| parent | a2618c822e666d4121cba29bee3fd50bf70c9743 (diff) | |
| download | libgcrypt-1d85452412b65e7976bc94969fc513ff6b880ed8.tar.gz | |
ecc: Use faster b parameter for Ed25519.
* cipher/ecc-curves.c (domain_parms): Replace b.
* tests/t-mpi-point.c (test_curve): Ditto.
--
This change has been suggested by NIIBE Yutaka:
Here,
0x98412DFC9311D490018C7338BF8688861767FF8FF5B2BEBE27548A14B235EC8FEDA4
is: (121666^-1 mod q)*121665.
(121666^-1) * 121665 mod q is:
0x2DFC9311D490018C7338BF8688861767FF8FF5B2BEBE27548A14B235ECA6874A
While it works for both, I think that shorter is better.
Signed-off-by: Werner Koch <wk@gnupg.org>
Diffstat (limited to 'cipher/ecc-curves.c')
| -rw-r--r-- | cipher/ecc-curves.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/cipher/ecc-curves.c b/cipher/ecc-curves.c index 74473407..15888a8b 100644 --- a/cipher/ecc-curves.c +++ b/cipher/ecc-curves.c @@ -103,7 +103,7 @@ static const ecc_domain_parms_t domain_parms[] = MPI_EC_TWISTEDEDWARDS, ECC_DIALECT_ED25519, "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFED", "-0x01", - "-0x98412DFC9311D490018C7338BF8688861767FF8FF5B2BEBE27548A14B235EC8FEDA4", + "-0x2DFC9311D490018C7338BF8688861767FF8FF5B2BEBE27548A14B235ECA6874A", "0x1000000000000000000000000000000014DEF9DEA2F79CD65812631A5CF5D3ED", "0x216936D3CD6E53FEC0A4E231FDD6DC5C692CC7609525A7B2C9562D608F25D51A", "0x6666666666666666666666666666666666666666666666666666666666666658" |