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Use Montgomery's Trick on sm2_fast_sign_pre_compute

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This commit is contained in:
Zhi Guan
2024-04-22 17:43:05 +08:00
parent bdd2149dc8
commit e05fd9c1b9
3 changed files with 90 additions and 89 deletions
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18
include/gmssl/sm2.h
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@@ -128,8 +128,16 @@ int sm2_do_sign(const SM2_KEY *key, const uint8_t dgst[32], SM2_SIGNATURE *sig);
int sm2_do_verify(const SM2_KEY *key, const uint8_t dgst[32], const SM2_SIGNATURE *sig);
int sm2_fast_sign_compute_key(const SM2_KEY *key, sm2_z256_t fast_private);
int sm2_fast_sign_pre_compute(sm2_z256_t k, sm2_z256_t x1_modn);
int sm2_fast_sign(const sm2_z256_t fast_private, const sm2_z256_t k, const sm2_z256_t x1_modn,
typedef struct {
sm2_z256_t k;
sm2_z256_t x1_modn;
} SM2_SIGN_PRE_COMP;
#define SM2_SIGN_PRE_COMP_COUNT 32
int sm2_fast_sign_pre_compute(SM2_SIGN_PRE_COMP pre_comp[32]);
int sm2_fast_sign(const sm2_z256_t fast_private, SM2_SIGN_PRE_COMP *pre_comp,
const uint8_t dgst[32], SM2_SIGNATURE *sig);
@@ -159,12 +167,6 @@ int sm2_sign_fixlen(const SM2_KEY *key, const uint8_t dgst[32], size_t siglen, u
int sm2_compute_z(uint8_t z[32], const SM2_Z256_POINT *pub, const char *id, size_t idlen);
typedef struct {
sm2_z256_t k;
sm2_z256_t x1; // x1 (mod n)
} SM2_SIGN_PRE_COMP;
#define SM2_SIGN_PRE_COMP_COUNT 32
typedef struct {
SM3_CTX sm3_ctx;