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Add SM2_VERIFY_CTX

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Zhi Guan
2024-04-25 08:40:39 +08:00
parent 52c1e57e8c
commit f8fbeddd4f
10 changed files with 216 additions and 41 deletions
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91
src/sm2_z256.c
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@@ -1371,15 +1371,8 @@ void sm2_z256_point_sub(SM2_Z256_POINT *R, const SM2_Z256_POINT *A, const SM2_Z2
sm2_z256_point_add(R, A, &neg_B);
}
void sm2_z256_point_mul(SM2_Z256_POINT *R, const uint64_t k[4], const SM2_Z256_POINT *P)
void sm2_z256_point_mul_pre_compute(const SM2_Z256_POINT *P, SM2_Z256_POINT T[16])
{
int window_size = 5;
SM2_Z256_POINT T[16];
int R_infinity = 1;
int n = (256 + window_size - 1)/window_size;
int i;
// T[i] = (i + 1) * P
memcpy(&T[0], P, sizeof(SM2_Z256_POINT));
/*
@@ -1416,6 +1409,88 @@ void sm2_z256_point_mul(SM2_Z256_POINT *R, const uint64_t k[4], const SM2_Z256_P
sm2_z256_point_add(&T[13-1], &T[7-1], &T[6-1]);
sm2_z256_point_add(&T[15-1], &T[8-1], &T[7-1]);
}
void sm2_z256_point_mul_ex(SM2_Z256_POINT *R, const uint64_t k[4], const SM2_Z256_POINT *T)
{
int window_size = 5;
int R_infinity = 1;
int n = (256 + window_size - 1)/window_size;
int i;
for (i = n - 1; i >= 0; i--) {
int booth = sm2_z256_get_booth(k, window_size, i);
if (R_infinity) {
if (booth != 0) {
*R = T[booth - 1];
R_infinity = 0;
}
} else {
sm2_z256_point_dbl_x5(R, R);
if (booth > 0) {
sm2_z256_point_add(R, R, &T[booth - 1]);
} else if (booth < 0) {
sm2_z256_point_sub(R, R, &T[-booth - 1]);
}
}
}
if (R_infinity) {
memset(R, 0, sizeof(*R));
}
}
void sm2_z256_point_mul(SM2_Z256_POINT *R, const uint64_t k[4], const SM2_Z256_POINT *P)
{
int window_size = 5;
SM2_Z256_POINT T[16];
int R_infinity = 1;
int n = (256 + window_size - 1)/window_size;
int i;
#if 0
sm2_z256_point_mul_pre_compute(P, T);
#else
// T[i] = (i + 1) * P
memcpy(&T[0], P, sizeof(SM2_Z256_POINT));
/*
sm2_z256_point_dbl(&T[ 1], &T[ 0]);
sm2_z256_point_add(&T[ 2], &T[ 1], P);
sm2_z256_point_dbl(&T[ 3], &T[ 1]);
sm2_z256_point_add(&T[ 4], &T[ 3], P);
sm2_z256_point_dbl(&T[ 5], &T[ 2]);
sm2_z256_point_add(&T[ 6], &T[ 5], P);
sm2_z256_point_dbl(&T[ 7], &T[ 3]);
sm2_z256_point_add(&T[ 8], &T[ 7], P);
sm2_z256_point_dbl(&T[ 9], &T[ 4]);
sm2_z256_point_add(&T[10], &T[ 9], P);
sm2_z256_point_dbl(&T[11], &T[ 5]);
sm2_z256_point_add(&T[12], &T[11], P);
sm2_z256_point_dbl(&T[13], &T[ 6]);
sm2_z256_point_add(&T[14], &T[13], P);
sm2_z256_point_dbl(&T[15], &T[ 7]);
*/
sm2_z256_point_dbl(&T[2-1], &T[1-1]);
sm2_z256_point_dbl(&T[4-1], &T[2-1]);
sm2_z256_point_dbl(&T[8-1], &T[4-1]);
sm2_z256_point_dbl(&T[16-1], &T[8-1]);
sm2_z256_point_add(&T[3-1], &T[2-1], P);
sm2_z256_point_dbl(&T[6-1], &T[3-1]);
sm2_z256_point_dbl(&T[12-1], &T[6-1]);
sm2_z256_point_add(&T[5-1], &T[3-1], &T[2-1]);
sm2_z256_point_dbl(&T[10-1], &T[5-1]);
sm2_z256_point_add(&T[7-1], &T[4-1], &T[3-1]);
sm2_z256_point_dbl(&T[14-1], &T[7-1]);
sm2_z256_point_add(&T[9-1], &T[4-1], &T[5-1]);
sm2_z256_point_add(&T[11-1], &T[6-1], &T[5-1]);
sm2_z256_point_add(&T[13-1], &T[7-1], &T[6-1]);
sm2_z256_point_add(&T[15-1], &T[8-1], &T[7-1]);
#endif
for (i = n - 1; i >= 0; i--) {
int booth = sm2_z256_get_booth(k, window_size, i);