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Gorachya
2022-05-17 17:55:29 +08:00
committed by GitHub
parent b6685304aa
commit 502bfd11c2
2 changed files with 29 additions and 17 deletions
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38
src/sm9_alg.c
View File

@@ -1702,11 +1702,15 @@ void sm9_twist_point_mul_generator(sm9_twist_point_t *R, const sm9_bn_t k)
void sm9_eval_g_tangent(sm9_fp12_t num, sm9_fp12_t den, const sm9_twist_point_t *P, const sm9_point_t *Q)
{
sm9_fp_t x;
sm9_fp_t y;
sm9_point_get_xy(Q, x, y);
const sm9_fp_t *XP = P->X;
const sm9_fp_t *YP = P->Y;
const sm9_fp_t *ZP = P->Z;
const uint64_t *xQ = Q->X;
const uint64_t *yQ = Q->Y;
const uint64_t *xQ = x;
const uint64_t *yQ = y;
sm9_fp_t *a0 = num[0][0];
sm9_fp_t *a1 = num[0][1];
@@ -1743,14 +1747,18 @@ void sm9_eval_g_tangent(sm9_fp12_t num, sm9_fp12_t den, const sm9_twist_point_t
void sm9_eval_g_line(sm9_fp12_t num, sm9_fp12_t den, const sm9_twist_point_t *T, const sm9_twist_point_t *P, const sm9_point_t *Q)
{
sm9_fp_t x;
sm9_fp_t y;
sm9_point_get_xy(Q, x, y);
const sm9_fp_t *XT = T->X;
const sm9_fp_t *YT = T->Y;
const sm9_fp_t *ZT = T->Z;
const sm9_fp_t *XP = P->X;
const sm9_fp_t *YP = P->Y;
const sm9_fp_t *ZP = P->Z;
const uint64_t *xQ = Q->X;
const uint64_t *yQ = Q->Y;
const uint64_t *xQ = x;
const uint64_t *yQ = y;
sm9_fp_t *a0 = num[0][0];
sm9_fp_t *a1 = num[0][1];
@@ -2209,33 +2217,39 @@ int sm9_point_to_uncompressed_octets(const sm9_point_t *P, uint8_t octets[65])
sm9_fp_t x;
sm9_fp_t y;
sm9_point_get_xy(P, x, y);
sm9_bn_to_bytes(x, octets);
sm9_bn_to_bytes(y, octets + 32);
octets[0] = 0x04;
sm9_bn_to_bytes(x, octets + 1);
sm9_bn_to_bytes(y, octets + 32 + 1);
return 1;
}
int sm9_point_from_uncompressed_octets(sm9_point_t *P, const uint8_t octets[65])
{
sm9_bn_from_bytes(P->X, octets);
sm9_bn_from_bytes(P->Y, octets + 32);
assert(octets[0] == 0x04);
sm9_bn_from_bytes(P->X, octets + 1);
sm9_bn_from_bytes(P->Y, octets + 32 + 1);
sm9_fp_set_one(P->Z);
if (!sm9_point_is_on_curve(P)) return -1;
return 1;
}
int sm9_twist_point_to_uncompressed_octets(const sm9_twist_point_t *P, uint8_t octets[129])
{
octets[0] = 0x04;
sm9_fp2_t x;
sm9_fp2_t y;
sm9_twist_point_get_xy(P, x, y);
sm9_fp2_to_bytes(x, octets);
sm9_fp2_to_bytes(y, octets + 32 * 2);
sm9_fp2_to_bytes(x, octets + 1);
sm9_fp2_to_bytes(y, octets + 32 * 2 + 1);
return 1;
}
int sm9_twist_point_from_uncompressed_octets(sm9_twist_point_t *P, const uint8_t octets[129])
{
sm9_fp2_from_bytes(P->X, octets);
sm9_fp2_from_bytes(P->Y, octets + 32 * 2);
assert(octets[0] == 0x04);
sm9_fp2_from_bytes(P->X, octets + 1);
sm9_fp2_from_bytes(P->Y, octets + 32 * 2 + 1);
sm9_fp2_set_one(P->Z);
if (!sm9_twist_point_is_on_curve(P)) return -1;
return 1;
}

8
src/sm9_lib.c
View File

@@ -139,8 +139,6 @@ int sm9_sign_finish(SM9_SIGN_CTX *ctx, const SM9_SIGN_KEY *key, uint8_t *sig, si
return 1;
}
#define hex_r "00033C8616B06704813203DFD00965022ED15975C662337AED648835DC4B1CBE"
int sm9_do_sign(const SM9_SIGN_KEY *key, const SM3_CTX *sm3_ctx, SM9_SIGNATURE *sig)
{
sm9_fn_t r;
@@ -158,7 +156,6 @@ int sm9_do_sign(const SM9_SIGN_KEY *key, const SM3_CTX *sm3_ctx, SM9_SIGNATURE *
do {
// A2: rand r in [1, N-1]
sm9_fn_rand(r);
//sm9_bn_from_hex(r, hex_r);
// A3: w = g^r
sm9_fp12_pow(g, g, r);
@@ -289,7 +286,7 @@ int sm9_kem_encrypt(const SM9_ENC_MASTER_KEY *mpk, const char *id, size_t idlen,
SM3_KDF_CTX kdf_ctx;
// A1: Q = H1(ID||hid,N) * P1 + Ppube
sm9_hash1(r, id, idlen, SM9_HID_EXCH);
sm9_hash1(r, id, idlen, SM9_HID_ENC);
sm9_point_mul(C, r, SM9_P1);
sm9_point_add(C, C, &mpk->Ppube);
@@ -335,10 +332,11 @@ int sm9_kem_decrypt(const SM9_ENC_KEY *key, const char *id, size_t idlen, const
SM3_KDF_CTX kdf_ctx;
// B1: check C in G1
sm9_point_to_uncompressed_octets(C, cbuf + 1);
sm9_point_to_uncompressed_octets(C, cbuf);
// B2: w = e(C, de);
sm9_pairing(w, &key->de, C);
sm9_fp12_to_bytes(w, wbuf);
// B3: K = KDF(C || w || ID, klen)
sm3_kdf_init(&kdf_ctx, klen);