diff options
Diffstat (limited to 'crypto/ec/ec_lcl.h')
| -rw-r--r-- | crypto/ec/ec_lcl.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/crypto/ec/ec_lcl.h b/crypto/ec/ec_lcl.h index ae380290a2..78be154e44 100644 --- a/crypto/ec/ec_lcl.h +++ b/crypto/ec/ec_lcl.h @@ -178,6 +178,15 @@ struct ec_method_st { int (*field_inverse_mod_ord)(const EC_GROUP *, BIGNUM *r, const BIGNUM *x, BN_CTX *); int (*blind_coordinates)(const EC_GROUP *group, EC_POINT *p, BN_CTX *ctx); + int (*ladder_pre)(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx); + int (*ladder_step)(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx); + int (*ladder_post)(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx); }; /* @@ -638,3 +647,42 @@ void X25519_public_from_private(uint8_t out_public_value[32], const uint8_t private_key[32]); int ec_point_blind_coordinates(const EC_GROUP *group, EC_POINT *p, BN_CTX *ctx); + +static inline int ec_point_ladder_pre(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx) +{ + if (group->meth->ladder_pre != NULL) + return group->meth->ladder_pre(group, r, s, p, ctx); + + if (!EC_POINT_copy(s, p) + || !EC_POINT_dbl(group, r, s, ctx)) + return 0; + + return 1; +} + +static inline int ec_point_ladder_step(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx) +{ + if (group->meth->ladder_step != NULL) + return group->meth->ladder_step(group, r, s, p, ctx); + + if (!EC_POINT_add(group, s, r, s, ctx) + || !EC_POINT_dbl(group, r, r, ctx)) + return 0; + + return 1; + +} + +static inline int ec_point_ladder_post(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx) +{ + if (group->meth->ladder_post != NULL) + return group->meth->ladder_post(group, r, s, p, ctx); + + return 1; +} |