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Use z256 and jacobian coordinates as inner presentation of SM2 point

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This commit is contained in:
Zhi Guan
2024-04-18 21:27:00 +08:00
parent 549c68d2df
commit e9bbcf5490
18 changed files with 312 additions and 646 deletions
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24
src/sm2_exch.c
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@@ -20,36 +20,30 @@
#include <gmssl/endian.h>
int sm2_do_ecdh(const SM2_KEY *key, const SM2_POINT *peer_public, SM2_POINT *out)
int sm2_do_ecdh(const SM2_KEY *key, const SM2_Z256_POINT *peer_public, SM2_Z256_POINT *out)
{
/*
if (sm2_point_is_on_curve(peer_public) != 1) {
error_print();
return -1;
}
*/
if (sm2_point_mul(out, key->private_key, peer_public) != 1) {
error_print();
return -1;
}
sm2_z256_point_mul(out, key->private_key, peer_public);
return 1;
}
int sm2_ecdh(const SM2_KEY *key, const uint8_t *peer_public, size_t peer_public_len, SM2_POINT *out)
// FIXME: 输入(octets)和输出(bytes)格式不一致
int sm2_ecdh(const SM2_KEY *key, const uint8_t *peer_public, size_t peer_public_len, uint8_t out[64])
{
SM2_POINT point;
SM2_Z256_POINT point;
if (!key || !peer_public || !peer_public_len || !out) {
error_print();
return -1;
}
if (sm2_point_from_octets(&point, peer_public, peer_public_len) != 1) {
if (sm2_z256_point_from_octets(&point, peer_public, peer_public_len) != 1) {
error_print();
return -1;
}
if (sm2_do_ecdh(key, &point, out) != 1) {
if (sm2_do_ecdh(key, &point, &point) != 1) {
error_print();
return -1;
}
sm2_z256_point_to_bytes(&point, out);
return 1;
}