diff options
| author | Parménides GV <parmegv@sdf.org> | 2014-06-13 13:24:13 +0200 |
|---|---|---|
| committer | Parménides GV <parmegv@sdf.org> | 2014-06-13 13:24:13 +0200 |
| commit | 69b10487fcd63dfe1e94fa97c9f3fd9b035646b4 (patch) | |
| tree | d4960893a4444634d404c7fbe4fa3e8778d30179 /app/openssl/crypto/ec/ec_cvt.c | |
| parent | 9f6cfff38ae87922adc022300e1e2fd1c0d4c3e4 (diff) | |
| parent | e45929e220fe49e30235a1d4d36c1a413547f8bf (diff) | |
Merge branch 'develop'
Diffstat (limited to 'app/openssl/crypto/ec/ec_cvt.c')
| -rw-r--r-- | app/openssl/crypto/ec/ec_cvt.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/app/openssl/crypto/ec/ec_cvt.c b/app/openssl/crypto/ec/ec_cvt.c index d45640ba..bfcbab35 100644 --- a/app/openssl/crypto/ec/ec_cvt.c +++ b/app/openssl/crypto/ec/ec_cvt.c @@ -78,7 +78,32 @@ EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, const BIGNUM const EC_METHOD *meth; EC_GROUP *ret; +#if defined(OPENSSL_BN_ASM_MONT) + /* + * This might appear controversial, but the fact is that generic + * prime method was observed to deliver better performance even + * for NIST primes on a range of platforms, e.g.: 60%-15% + * improvement on IA-64, ~25% on ARM, 30%-90% on P4, 20%-25% + * in 32-bit build and 35%--12% in 64-bit build on Core2... + * Coefficients are relative to optimized bn_nist.c for most + * intensive ECDSA verify and ECDH operations for 192- and 521- + * bit keys respectively. Choice of these boundary values is + * arguable, because the dependency of improvement coefficient + * from key length is not a "monotone" curve. For example while + * 571-bit result is 23% on ARM, 384-bit one is -1%. But it's + * generally faster, sometimes "respectfully" faster, sometimes + * "tolerably" slower... What effectively happens is that loop + * with bn_mul_add_words is put against bn_mul_mont, and the + * latter "wins" on short vectors. Correct solution should be + * implementing dedicated NxN multiplication subroutines for + * small N. But till it materializes, let's stick to generic + * prime method... + * <appro> + */ + meth = EC_GFp_mont_method(); +#else meth = EC_GFp_nist_method(); +#endif ret = EC_GROUP_new(meth); if (ret == NULL) @@ -122,7 +147,7 @@ EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, const BIGNUM return ret; } - +#ifndef OPENSSL_NO_EC2M EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) { const EC_METHOD *meth; @@ -142,3 +167,4 @@ EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a, const BIGNUM return ret; } +#endif |