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Add sm2_point_ functions

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This commit is contained in:
Zhi Guan
2023-02-19 08:24:17 +08:00
parent 289a9677fe
commit 90c022c803
2 changed files with 10 additions and 1 deletions
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5
include/gmssl/sm2.h
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@@ -164,13 +164,16 @@ typedef struct {
uint8_t y[32]; uint8_t y[32];
} SM2_POINT; } SM2_POINT;
#define sm2_point_init(P) memset((P),0,sizeof(SM2_POINT))
#define sm2_point_set_infinity(P) sm2_point_init(P)
int sm2_point_from_octets(SM2_POINT *P, const uint8_t *in, size_t inlen);
void sm2_point_to_compressed_octets(const SM2_POINT *P, uint8_t out[33]); void sm2_point_to_compressed_octets(const SM2_POINT *P, uint8_t out[33]);
void sm2_point_to_uncompressed_octets(const SM2_POINT *P, uint8_t out[65]); void sm2_point_to_uncompressed_octets(const SM2_POINT *P, uint8_t out[65]);
int sm2_point_from_octets(SM2_POINT *P, const uint8_t *in, size_t inlen);
int sm2_point_from_x(SM2_POINT *P, const uint8_t x[32], int y); int sm2_point_from_x(SM2_POINT *P, const uint8_t x[32], int y);
int sm2_point_from_xy(SM2_POINT *P, const uint8_t x[32], const uint8_t y[32]); int sm2_point_from_xy(SM2_POINT *P, const uint8_t x[32], const uint8_t y[32]);
int sm2_point_is_on_curve(const SM2_POINT *P); int sm2_point_is_on_curve(const SM2_POINT *P);
int sm2_point_is_at_infinity(const SM2_POINT *P);
int sm2_point_add(SM2_POINT *R, const SM2_POINT *P, const SM2_POINT *Q); int sm2_point_add(SM2_POINT *R, const SM2_POINT *P, const SM2_POINT *Q);
int sm2_point_sub(SM2_POINT *R, const SM2_POINT *P, const SM2_POINT *Q); int sm2_point_sub(SM2_POINT *R, const SM2_POINT *P, const SM2_POINT *Q);
int sm2_point_neg(SM2_POINT *R, const SM2_POINT *P); int sm2_point_neg(SM2_POINT *R, const SM2_POINT *P);

6
src/sm2_alg.c
View File

@@ -13,6 +13,7 @@
#include <string.h> #include <string.h>
#include <assert.h> #include <assert.h>
#include <gmssl/sm2.h> #include <gmssl/sm2.h>
#include <gmssl/mem.h>
#include <gmssl/asn1.h> #include <gmssl/asn1.h>
#include <gmssl/rand.h> #include <gmssl/rand.h>
#include <gmssl/error.h> #include <gmssl/error.h>
@@ -1088,6 +1089,11 @@ int sm2_point_is_on_curve(const SM2_POINT *P)
return sm2_jacobian_point_is_on_curve(&T); return sm2_jacobian_point_is_on_curve(&T);
} }
int sm2_point_is_at_infinity(const SM2_POINT *P)
{
return mem_is_zero((uint8_t *)P, sizeof(SM2_POINT));
}
int sm2_point_from_x(SM2_POINT *P, const uint8_t x[32], int y) int sm2_point_from_x(SM2_POINT *P, const uint8_t x[32], int y)
{ {
SM2_BN _x, _y, _g, _z; SM2_BN _x, _y, _g, _z;