diff options
| author | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2017-11-21 22:55:57 +0000 |
|---|---|---|
| committer | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2017-12-07 19:23:10 +0000 |
| commit | ada4291469156f76eb605b2110a068df58a4e142 (patch) | |
| tree | 6400f6cdff24a12d0d30fe0daec53caf92545490 /src/crypto | |
| parent | ringct: add a version of addKeys which returns the result (diff) | |
| download | monero-ada4291469156f76eb605b2110a068df58a4e142.tar.xz | |
add a version of ge_double_scalarmult_precomp_vartime with A precomp
Diffstat (limited to 'src/crypto')
| -rw-r--r-- | src/crypto/crypto-ops.c | 11 | ||||
| -rw-r--r-- | src/crypto/crypto-ops.h | 1 |
2 files changed, 9 insertions, 3 deletions
diff --git a/src/crypto/crypto-ops.c b/src/crypto/crypto-ops.c index 1e4969558..b5c62bce4 100644 --- a/src/crypto/crypto-ops.c +++ b/src/crypto/crypto-ops.c @@ -2000,17 +2000,15 @@ void ge_scalarmult(ge_p2 *r, const unsigned char *a, const ge_p3 *A) { } } -void ge_double_scalarmult_precomp_vartime(ge_p2 *r, const unsigned char *a, const ge_p3 *A, const unsigned char *b, const ge_dsmp Bi) { +void ge_double_scalarmult_precomp_vartime2(ge_p2 *r, const unsigned char *a, const ge_dsmp Ai, const unsigned char *b, const ge_dsmp Bi) { signed char aslide[256]; signed char bslide[256]; - ge_dsmp Ai; /* A, 3A, 5A, 7A, 9A, 11A, 13A, 15A */ ge_p1p1 t; ge_p3 u; int i; slide(aslide, a); slide(bslide, b); - ge_dsm_precomp(Ai, A); ge_p2_0(r); @@ -2041,6 +2039,13 @@ void ge_double_scalarmult_precomp_vartime(ge_p2 *r, const unsigned char *a, cons } } +void ge_double_scalarmult_precomp_vartime(ge_p2 *r, const unsigned char *a, const ge_p3 *A, const unsigned char *b, const ge_dsmp Bi) { + ge_dsmp Ai; /* A, 3A, 5A, 7A, 9A, 11A, 13A, 15A */ + + ge_dsm_precomp(Ai, A); + ge_double_scalarmult_precomp_vartime2(r, a, Ai, b, Bi); +} + void ge_mul8(ge_p1p1 *r, const ge_p2 *t) { ge_p2 u; ge_p2_dbl(r, t); diff --git a/src/crypto/crypto-ops.h b/src/crypto/crypto-ops.h index 5091de1f6..c76455551 100644 --- a/src/crypto/crypto-ops.h +++ b/src/crypto/crypto-ops.h @@ -128,6 +128,7 @@ void sc_reduce(unsigned char *); void ge_scalarmult(ge_p2 *, const unsigned char *, const ge_p3 *); void ge_double_scalarmult_precomp_vartime(ge_p2 *, const unsigned char *, const ge_p3 *, const unsigned char *, const ge_dsmp); +void ge_double_scalarmult_precomp_vartime2(ge_p2 *, const unsigned char *, const ge_dsmp, const unsigned char *, const ge_dsmp); void ge_mul8(ge_p1p1 *, const ge_p2 *); extern const fe fe_ma2; extern const fe fe_ma; |