SM2_F_PKEY_SM2_PARAMGEN:277:pkey_sm2_paramgen
SM2_F_PKEY_SM2_SIGN:278:pkey_sm2_sign
SM2_F_SM2_COMPUTE_MSG_HASH:284:SM2_compute_msg_hash
+SM2_F_SM2_COMPUTE_USERID_DIGEST:286:SM2_compute_userid_digest
SM2_F_SM2_DECRYPT:279:SM2_decrypt
SM2_F_SM2_ENCRYPT:280:SM2_encrypt
+SM2_F_SM2_PLAINTEXT_SIZE:287:SM2_plaintext_size
SM2_F_SM2_SIGN:281:SM2_sign
SM2_F_SM2_SIG_GEN:285:SM2_sig_gen
SM2_F_SM2_SIG_VERIFY:282:SM2_sig_verify
SM2_R_UNKNOWN_GROUP:129:unknown group
SM2_R_UNKNOWN_ORDER:114:unknown order
SM2_R_UNSUPPORTED_FIELD:131:unsupported field
+SM2_R_USER_ID_TOO_LARGE:136:user id too large
SM2_R_WRONG_CURVE_PARAMETERS:145:wrong curve parameters
SM2_R_WRONG_ORDER:130:wrong order
SSL_R_APP_DATA_IN_HANDSHAKE:100:app data in handshake
# define SM2_F_PKEY_SM2_PARAMGEN 277
# define SM2_F_PKEY_SM2_SIGN 278
# define SM2_F_SM2_COMPUTE_MSG_HASH 284
+# define SM2_F_SM2_COMPUTE_USERID_DIGEST 286
# define SM2_F_SM2_DECRYPT 279
# define SM2_F_SM2_ENCRYPT 280
+# define SM2_F_SM2_PLAINTEXT_SIZE 287
# define SM2_F_SM2_SIGN 281
# define SM2_F_SM2_SIG_GEN 285
# define SM2_F_SM2_SIG_VERIFY 282
# define SM2_R_UNKNOWN_GROUP 129
# define SM2_R_UNKNOWN_ORDER 114
# define SM2_R_UNSUPPORTED_FIELD 131
+# define SM2_R_USER_ID_TOO_LARGE 136
# define SM2_R_WRONG_CURVE_PARAMETERS 145
# define SM2_R_WRONG_ORDER 130
size_t overhead;
if (md_size < 0) {
- SM2err(SM2_F_SM2_ENCRYPT, SM2_R_INVALID_DIGEST);
+ SM2err(SM2_F_SM2_PLAINTEXT_SIZE, SM2_R_INVALID_DIGEST);
return 0;
}
if (field_size == 0) {
- SM2err(SM2_F_SM2_ENCRYPT, SM2_R_INVALID_FIELD);
+ SM2err(SM2_F_SM2_PLAINTEXT_SIZE, SM2_R_INVALID_FIELD);
return 0;
}
overhead = 10 + 2 * field_size + (size_t)md_size;
- if(msg_len <= overhead) {
- SM2err(SM2_F_SM2_ENCRYPT, SM2_R_INVALID_ENCODING);
+ if (msg_len <= overhead) {
+ SM2err(SM2_F_SM2_PLAINTEXT_SIZE, SM2_R_INVALID_ENCODING);
return 0;
}
{
int rc = 0;
int i;
-
BN_CTX *ctx = NULL;
const EC_GROUP *group = EC_KEY_get0_group(key);
EC_POINT *C1 = NULL;
struct SM2_Ciphertext_st *sm2_ctext = NULL;
BIGNUM *x2 = NULL;
BIGNUM *y2 = NULL;
-
uint8_t *x2y2 = NULL;
uint8_t *computed_C3 = NULL;
-
const size_t field_size = EC_field_size(group);
const int hash_size = EVP_MD_size(digest);
-
uint8_t *msg_mask = NULL;
const uint8_t *C2 = NULL;
const uint8_t *C3 = NULL;
sm2_ctext = d2i_SM2_Ciphertext(NULL, &ciphertext, ciphertext_len);
- if (sm2_ctext == NULL)
- {
+ if (sm2_ctext == NULL) {
SM2err(SM2_F_SM2_DECRYPT, SM2_R_ASN1_ERROR);
goto done;
- }
+ }
- if (sm2_ctext->C3->length != hash_size)
- {
+ if (sm2_ctext->C3->length != hash_size) {
SM2err(SM2_F_SM2_DECRYPT, SM2_R_INVALID_ENCODING);
goto done;
- }
+ }
C2 = sm2_ctext->C2->data;
C3 = sm2_ctext->C3->data;
msg_len = sm2_ctext->C2->length;
ctx = BN_CTX_new();
- if (ctx == NULL)
- {
+ if (ctx == NULL) {
SM2err(SM2_F_SM2_DECRYPT, ERR_R_MALLOC_FAILURE);
goto done;
- }
+ }
BN_CTX_start(ctx);
x2 = BN_CTX_get(ctx);
y2 = BN_CTX_get(ctx);
- if(y2 == NULL)
- {
+ if (y2 == NULL) {
SM2err(SM2_F_SM2_DECRYPT, ERR_R_BN_LIB);
goto done;
- }
+ }
msg_mask = OPENSSL_zalloc(msg_len);
x2y2 = OPENSSL_zalloc(2 * field_size);
computed_C3 = OPENSSL_zalloc(hash_size);
- if(msg_mask == NULL || x2y2 == NULL || computed_C3 == NULL)
- {
+ if (msg_mask == NULL || x2y2 == NULL || computed_C3 == NULL) {
SM2err(SM2_F_SM2_DECRYPT, ERR_R_MALLOC_FAILURE);
goto done;
- }
+ }
C1 = EC_POINT_new(group);
- if (C1 == NULL)
- {
+ if (C1 == NULL) {
SM2err(SM2_F_SM2_DECRYPT, ERR_R_MALLOC_FAILURE);
goto done;
- }
-
- if (EC_POINT_set_affine_coordinates_GFp
- (group, C1, sm2_ctext->C1x, sm2_ctext->C1y, ctx) == 0)
- {
- SM2err(SM2_F_SM2_DECRYPT, ERR_R_EC_LIB);
- goto done;
- }
-
- if (EC_POINT_mul(group, C1, NULL, C1, EC_KEY_get0_private_key(key), ctx) ==
- 0)
- {
- SM2err(SM2_F_SM2_DECRYPT, ERR_R_EC_LIB);
- goto done;
- }
+ }
- if (EC_POINT_get_affine_coordinates_GFp(group, C1, x2, y2, ctx) == 0)
- {
+ if (!EC_POINT_set_affine_coordinates_GFp(group, C1, sm2_ctext->C1x,
+ sm2_ctext->C1y, ctx)
+ || !EC_POINT_mul(group, C1, NULL, C1, EC_KEY_get0_private_key(key),
+ ctx)
+ || !EC_POINT_get_affine_coordinates_GFp(group, C1, x2, y2, ctx)) {
SM2err(SM2_F_SM2_DECRYPT, ERR_R_EC_LIB);
goto done;
- }
-
- BN_bn2binpad(x2, x2y2, field_size);
- BN_bn2binpad(y2, x2y2 + field_size, field_size);
+ }
- if (ECDH_KDF_X9_62(msg_mask, msg_len, x2y2, 2 * field_size, NULL, 0, digest)
- == 0)
+ if (BN_bn2binpad(x2, x2y2, field_size) < 0
+ || BN_bn2binpad(y2, x2y2 + field_size, field_size) < 0
+ || !ECDH_KDF_X9_62(msg_mask, msg_len, x2y2, 2 * field_size, NULL, 0,
+ digest)) {
+ SM2err(SM2_F_SM2_DECRYPT, ERR_R_INTERNAL_ERROR);
goto done;
+ }
for (i = 0; i != msg_len; ++i)
ptext_buf[i] = C2[i] ^ msg_mask[i];
hash = EVP_MD_CTX_new();
-
- if (hash == NULL)
- {
+ if (hash == NULL) {
SM2err(SM2_F_SM2_DECRYPT, ERR_R_MALLOC_FAILURE);
goto done;
- }
-
- if (EVP_DigestInit(hash, digest) == 0)
- {
- SM2err(SM2_F_SM2_DECRYPT, ERR_R_EVP_LIB);
- goto done;
- }
-
- if (EVP_DigestUpdate(hash, x2y2, field_size) == 0)
- {
- SM2err(SM2_F_SM2_DECRYPT, ERR_R_EVP_LIB);
- goto done;
- }
-
- if (EVP_DigestUpdate(hash, ptext_buf, msg_len) == 0)
- {
- SM2err(SM2_F_SM2_DECRYPT, ERR_R_EVP_LIB);
- goto done;
- }
-
- if (EVP_DigestUpdate(hash, x2y2 + field_size, field_size) == 0)
- {
- SM2err(SM2_F_SM2_DECRYPT, ERR_R_EVP_LIB);
- goto done;
- }
+ }
- if (EVP_DigestFinal(hash, computed_C3, NULL) == 0)
- {
+ if (!EVP_DigestInit(hash, digest)
+ || !EVP_DigestUpdate(hash, x2y2, field_size)
+ || !EVP_DigestUpdate(hash, ptext_buf, msg_len)
+ || !EVP_DigestUpdate(hash, x2y2 + field_size, field_size)
+ || !EVP_DigestFinal(hash, computed_C3, NULL)) {
SM2err(SM2_F_SM2_DECRYPT, ERR_R_EVP_LIB);
goto done;
- }
+ }
- if (memcmp(computed_C3, C3, hash_size) != 0)
+ if (CRYPTO_memcmp(computed_C3, C3, hash_size) != 0) {
+ SM2err(SM2_F_SM2_DECRYPT, SM2_R_INVALID_DIGEST);
goto done;
+ }
rc = 1;
*ptext_len = msg_len;
done:
-
if (rc == 0)
memset(ptext_buf, 0, *ptext_len);
{ERR_PACK(ERR_LIB_SM2, SM2_F_PKEY_SM2_SIGN, 0), "pkey_sm2_sign"},
{ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_COMPUTE_MSG_HASH, 0),
"SM2_compute_msg_hash"},
+ {ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_COMPUTE_USERID_DIGEST, 0),
+ "SM2_compute_userid_digest"},
{ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_DECRYPT, 0), "SM2_decrypt"},
{ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_ENCRYPT, 0), "SM2_encrypt"},
+ {ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_PLAINTEXT_SIZE, 0), "SM2_plaintext_size"},
{ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_SIGN, 0), "SM2_sign"},
{ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_SIG_GEN, 0), "SM2_sig_gen"},
{ERR_PACK(ERR_LIB_SM2, SM2_F_SM2_SIG_VERIFY, 0), "SM2_sig_verify"},
{ERR_PACK(ERR_LIB_SM2, 0, SM2_R_UNKNOWN_GROUP), "unknown group"},
{ERR_PACK(ERR_LIB_SM2, 0, SM2_R_UNKNOWN_ORDER), "unknown order"},
{ERR_PACK(ERR_LIB_SM2, 0, SM2_R_UNSUPPORTED_FIELD), "unsupported field"},
+ {ERR_PACK(ERR_LIB_SM2, 0, SM2_R_USER_ID_TOO_LARGE), "user id too large"},
{ERR_PACK(ERR_LIB_SM2, 0, SM2_R_WRONG_CURVE_PARAMETERS),
"wrong curve parameters"},
{ERR_PACK(ERR_LIB_SM2, 0, SM2_R_WRONG_ORDER), "wrong order"},
uint8_t *za = OPENSSL_zalloc(md_size);
BIGNUM *e = NULL;
- if (za == NULL)
- {
+ if (hash == NULL || za == NULL) {
SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_MALLOC_FAILURE);
goto done;
- }
-
- if (hash == NULL)
- {
- SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_MALLOC_FAILURE);
- goto done;
- }
-
- if (SM2_compute_userid_digest(za, digest, user_id, key) == 0)
- goto done;
-
- if (EVP_DigestInit(hash, digest) == 0)
- {
- SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_EVP_LIB);
- goto done;
- }
+ }
- if (EVP_DigestUpdate(hash, za, md_size) == 0)
- {
- SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_EVP_LIB);
+ if (md_size < 0) {
+ SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, SM2_R_INVALID_DIGEST);
goto done;
- }
+ }
- if (EVP_DigestUpdate(hash, msg, msg_len) == 0)
- {
- SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_EVP_LIB);
+ if (!SM2_compute_userid_digest(za, digest, user_id, key)) {
+ /* SM2err already called */
goto done;
- }
+ }
- /* reuse za buffer to hold H(ZA || M) */
- if (EVP_DigestFinal(hash, za, NULL) == 0)
- {
+ if (!EVP_DigestInit(hash, digest)
+ || !EVP_DigestUpdate(hash, za, md_size)
+ || !EVP_DigestUpdate(hash, msg, msg_len)
+ /* reuse za buffer to hold H(ZA || M) */
+ || !EVP_DigestFinal(hash, za, NULL)) {
SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_EVP_LIB);
goto done;
- }
+ }
e = BN_bin2bn(za, md_size, NULL);
+ if (e == NULL)
+ SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_INTERNAL_ERROR);
done:
OPENSSL_free(za);
return e;
}
-static
-ECDSA_SIG *SM2_sig_gen(const EC_KEY *key, const BIGNUM *e)
+static ECDSA_SIG *SM2_sig_gen(const EC_KEY *key, const BIGNUM *e)
{
const BIGNUM *dA = EC_KEY_get0_private_key(key);
const EC_GROUP *group = EC_KEY_get0_group(key);
const BIGNUM *order = EC_GROUP_get0_order(group);
-
ECDSA_SIG *sig = NULL;
EC_POINT *kG = NULL;
BN_CTX *ctx = NULL;
BIGNUM *tmp = NULL;
kG = EC_POINT_new(group);
- if (kG == NULL)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE);
- goto done;
- }
-
ctx = BN_CTX_new();
- if (ctx == NULL)
- {
+ if (kG == NULL || ctx == NULL) {
SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE);
goto done;
- }
+ }
- BN_CTX_start(ctx);
+ BN_CTX_start(ctx);
k = BN_CTX_get(ctx);
rk = BN_CTX_get(ctx);
x1 = BN_CTX_get(ctx);
tmp = BN_CTX_get(ctx);
-
- if (tmp == NULL)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB);
+ if (tmp == NULL) {
+ SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE);
goto done;
- }
+ }
- /* These values are returned and so should not be allocated out of the context */
+ /*
+ * These values are returned and so should not be allocated out of the
+ * context
+ */
r = BN_new();
s = BN_new();
- if (r == NULL || s == NULL)
- {
+ if (r == NULL || s == NULL) {
SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE);
goto done;
- }
+ }
for (;;) {
- BN_priv_rand_range(k, order);
-
- if (EC_POINT_mul(group, kG, k, NULL, NULL, ctx) == 0)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_EC_LIB);
- goto done;
- }
+ if (!BN_priv_rand_range(k, order)) {
+ SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR);
+ goto done;
+ }
- if (EC_POINT_get_affine_coordinates_GFp(group, kG, x1, NULL, ctx) == 0)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_EC_LIB);
+ if (!EC_POINT_mul(group, kG, k, NULL, NULL, ctx)
+ || !EC_POINT_get_affine_coordinates_GFp(group, kG, x1, NULL,
+ ctx)
+ || !BN_mod_add(r, e, x1, order, ctx)) {
+ SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR);
goto done;
- }
-
- if (BN_mod_add(r, e, x1, order, ctx) == 0)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB);
- goto done;
- }
+ }
/* try again if r == 0 or r+k == n */
if (BN_is_zero(r))
continue;
- BN_add(rk, r, k);
+ if (!BN_add(rk, r, k)) {
+ SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR);
+ goto done;
+ }
if (BN_cmp(rk, order) == 0)
continue;
- if(BN_add(s, dA, BN_value_one()) == 0)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB);
- goto done;
- }
-
- if(BN_mod_inverse(s, s, order, ctx) == 0)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB);
- goto done;
- }
-
- if(BN_mod_mul(tmp, dA, r, order, ctx) == 0)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB);
- goto done;
- }
-
- if(BN_sub(tmp, k, tmp) == 0)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB);
- goto done;
- }
-
- if(BN_mod_mul(s, s, tmp, order, ctx) == 0)
- {
- SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB);
- goto done;
- }
+ if (!BN_add(s, dA, BN_value_one())
+ || !BN_mod_inverse(s, s, order, ctx)
+ || !BN_mod_mul(tmp, dA, r, order, ctx)
+ || !BN_sub(tmp, k, tmp)
+ || !BN_mod_mul(s, s, tmp, order, ctx)) {
+ SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB);
+ goto done;
+ }
sig = ECDSA_SIG_new();
-
- if (sig == NULL)
- {
+ if (sig == NULL) {
SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE);
goto done;
- }
+ }
/* takes ownership of r and s */
ECDSA_SIG_set0(sig, r, s);
}
done:
-
if (sig == NULL) {
BN_free(r);
BN_free(s);
BN_CTX_free(ctx);
EC_POINT_free(kG);
return sig;
-
}
-static
-int SM2_sig_verify(const EC_KEY *key, const ECDSA_SIG *sig, const BIGNUM *e)
+static int SM2_sig_verify(const EC_KEY *key, const ECDSA_SIG *sig,
+ const BIGNUM *e)
{
int ret = 0;
const EC_GROUP *group = EC_KEY_get0_group(key);
const BIGNUM *order = EC_GROUP_get0_order(group);
BN_CTX *ctx = NULL;
EC_POINT *pt = NULL;
-
BIGNUM *t = NULL;
BIGNUM *x1 = NULL;
const BIGNUM *r = NULL;
const BIGNUM *s = NULL;
ctx = BN_CTX_new();
- if (ctx == NULL)
- {
- SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_MALLOC_FAILURE);
- goto done;
- }
-
pt = EC_POINT_new(group);
- if (pt == NULL)
- {
+ if (ctx == NULL || pt == NULL) {
SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_MALLOC_FAILURE);
goto done;
- }
+ }
BN_CTX_start(ctx);
-
t = BN_CTX_get(ctx);
x1 = BN_CTX_get(ctx);
-
- if (x1 == NULL)
- {
- SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_MALLOC_FAILURE);
- goto done;
- }
+ if (x1 == NULL) {
+ SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto done;
+ }
/*
- B1: verify whether r' in [1,n-1], verification failed if not
- B2: vefify whether s' in [1,n-1], verification failed if not
- B3: set M'~=ZA || M'
- B4: calculate e'=Hv(M'~)
- B5: calculate t = (r' + s') modn, verification failed if t=0
- B6: calculate the point (x1', y1')=[s']G + [t]PA
- B7: calculate R=(e'+x1') modn, verfication pass if yes, otherwise failed
+ * B1: verify whether r' in [1,n-1], verification failed if not
+ * B2: vefify whether s' in [1,n-1], verification failed if not
+ * B3: set M'~=ZA || M'
+ * B4: calculate e'=Hv(M'~)
+ * B5: calculate t = (r' + s') modn, verification failed if t=0
+ * B6: calculate the point (x1', y1')=[s']G + [t]PA
+ * B7: calculate R=(e'+x1') modn, verfication pass if yes, otherwise failed
*/
ECDSA_SIG_get0(sig, &r, &s);
- if ((BN_cmp(r, BN_value_one()) < 0) || (BN_cmp(s, BN_value_one()) < 0))
- {
+ if (BN_cmp(r, BN_value_one()) < 0
+ || BN_cmp(s, BN_value_one()) < 0
+ || BN_cmp(order, r) <= 0
+ || BN_cmp(order, s) <= 0) {
SM2err(SM2_F_SM2_SIG_VERIFY, SM2_R_BAD_SIGNATURE);
goto done;
- }
-
- if ((BN_cmp(order, r) <= 0) || (BN_cmp(order, s) <= 0))
- {
- SM2err(SM2_F_SM2_SIG_VERIFY, SM2_R_BAD_SIGNATURE);
- goto done;
- }
+ }
- if (BN_mod_add(t, r, s, order, ctx) == 0)
- {
+ if (!BN_mod_add(t, r, s, order, ctx)) {
SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_BN_LIB);
goto done;
- }
+ }
- if (BN_is_zero(t) == 1)
- {
+ if (BN_is_zero(t)) {
SM2err(SM2_F_SM2_SIG_VERIFY, SM2_R_BAD_SIGNATURE);
goto done;
- }
-
- if (EC_POINT_mul(group, pt, s, EC_KEY_get0_public_key(key), t, ctx) == 0)
- {
- SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_EC_LIB);
- goto done;
- }
+ }
- if (EC_POINT_get_affine_coordinates_GFp(group, pt, x1, NULL, ctx) == 0)
- {
+ if (!EC_POINT_mul(group, pt, s, EC_KEY_get0_public_key(key), t, ctx)
+ || !EC_POINT_get_affine_coordinates_GFp(group, pt, x1, NULL, ctx)) {
SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_EC_LIB);
goto done;
- }
+ }
- if (BN_mod_add(t, e, x1, order, ctx) == 0)
- {
+ if (!BN_mod_add(t, e, x1, order, ctx)) {
SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_BN_LIB);
goto done;
- }
+ }
if (BN_cmp(r, t) == 0)
ret = 1;
ECDSA_SIG *sig = NULL;
e = SM2_compute_msg_hash(digest, key, user_id, msg, msg_len);
- if (e == NULL)
+ if (e == NULL) {
+ /* SM2err already called */
goto done;
+ }
sig = SM2_sig_gen(key, e);
const char *user_id, const uint8_t *msg, size_t msg_len)
{
BIGNUM *e = NULL;
- int ret = -1;
+ int ret = 0;
e = SM2_compute_msg_hash(digest, key, user_id, msg, msg_len);
- if (e == NULL)
+ if (e == NULL) {
+ /* SM2err already called */
goto done;
+ }
ret = SM2_sig_verify(key, sig, e);
{
BIGNUM *e = NULL;
ECDSA_SIG *s = NULL;
+ int sigleni;
int ret = -1;
- if (type != NID_sm3 || dgstlen != 32)
- {
+ if (type != NID_sm3 || dgstlen != 32) {
SM2err(SM2_F_SM2_SIGN, SM2_R_INVALID_DIGEST_TYPE);
goto done;
- }
+ }
e = BN_bin2bn(dgst, dgstlen, NULL);
+ if (e == NULL) {
+ SM2err(SM2_F_SM2_SIGN, ERR_R_BN_LIB);
+ goto done;
+ }
s = SM2_sig_gen(eckey, e);
- *siglen = i2d_ECDSA_SIG(s, &sig);
+ sigleni = i2d_ECDSA_SIG(s, &sig);
+ if (sigleni < 0) {
+ SM2err(SM2_F_SM2_SIGN, ERR_R_INTERNAL_ERROR);
+ goto done;
+ }
+ *siglen = (unsigned int)sigleni;
ret = 1;
int derlen = -1;
int ret = -1;
- if (type != NID_sm3)
- {
+ if (type != NID_sm3) {
SM2err(SM2_F_SM2_VERIFY, SM2_R_INVALID_DIGEST_TYPE);
goto done;
- }
+ }
s = ECDSA_SIG_new();
- if (s == NULL)
- {
+ if (s == NULL) {
SM2err(SM2_F_SM2_VERIFY, ERR_R_MALLOC_FAILURE);
goto done;
- }
- if (d2i_ECDSA_SIG(&s, &p, sig_len) == NULL)
- {
+ }
+ if (d2i_ECDSA_SIG(&s, &p, sig_len) == NULL) {
SM2err(SM2_F_SM2_VERIFY, SM2_R_INVALID_ENCODING);
goto done;
- }
+ }
/* Ensure signature uses DER and doesn't have trailing garbage */
derlen = i2d_ECDSA_SIG(s, &der);
- if (derlen != sig_len || memcmp(sig, der, derlen) != 0)
- {
+ if (derlen != sig_len || memcmp(sig, der, derlen) != 0) {
SM2err(SM2_F_SM2_VERIFY, SM2_R_INVALID_ENCODING);
goto done;
- }
+ }
e = BN_bin2bn(dgst, dgstlen, NULL);
+ if (e == NULL) {
+ SM2err(SM2_F_SM2_VERIFY, ERR_R_BN_LIB);
+ goto done;
+ }
ret = SM2_sig_verify(eckey, s, e);
*/
#include "internal/sm2.h"
+#include "internal/sm2err.h"
+#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/bn.h>
#include <string.h>
const EC_KEY *key)
{
int rc = 0;
-
const EC_GROUP *group = EC_KEY_get0_group(key);
-
BN_CTX *ctx = NULL;
EVP_MD_CTX *hash = NULL;
-
BIGNUM *p = NULL;
BIGNUM *a = NULL;
BIGNUM *b = NULL;
-
BIGNUM *xG = NULL;
BIGNUM *yG = NULL;
BIGNUM *xA = NULL;
BIGNUM *yA = NULL;
-
int p_bytes = 0;
uint8_t *buf = NULL;
size_t uid_len = 0;
uint8_t e_byte = 0;
hash = EVP_MD_CTX_new();
- if (hash == NULL)
- goto done;
-
ctx = BN_CTX_new();
- if (ctx == NULL)
- goto done;
+ if (hash == NULL || ctx == NULL) {
+ SM2err(SM2_F_SM2_COMPUTE_USERID_DIGEST, ERR_R_MALLOC_FAILURE);
+ goto done;
+ }
p = BN_CTX_get(ctx);
a = BN_CTX_get(ctx);
xA = BN_CTX_get(ctx);
yA = BN_CTX_get(ctx);
- if (p == NULL || a == NULL || b == NULL ||
- xG == NULL || yG == NULL || xA == NULL || yA == NULL)
- goto done;
+ if (yA == NULL) {
+ SM2err(SM2_F_SM2_COMPUTE_USERID_DIGEST, ERR_R_MALLOC_FAILURE);
+ goto done;
+ }
memset(out, 0, EVP_MD_size(digest));
- if (EVP_DigestInit(hash, digest) == 0)
+ if (!EVP_DigestInit(hash, digest)) {
+ SM2err(SM2_F_SM2_COMPUTE_USERID_DIGEST, ERR_R_EVP_LIB);
goto done;
+ }
- /*
- ZA=H256(ENTLA || IDA || a || b || xG || yG || xA || yA)
- */
+ /* ZA = H256(ENTLA || IDA || a || b || xG || yG || xA || yA) */
uid_len = strlen(user_id);
-
- if (uid_len >= 8192) /* too large */
+ if (uid_len >= (UINT16_MAX / 8)) {
+ /* too large */
+ SM2err(SM2_F_SM2_COMPUTE_USERID_DIGEST, SM2_R_USER_ID_TOO_LARGE);
goto done;
+ }
- entla = (unsigned short)(8 * uid_len);
+ entla = (uint16_t)(8 * uid_len);
e_byte = entla >> 8;
- if (EVP_DigestUpdate(hash, &e_byte, 1) == 0)
+ if (!EVP_DigestUpdate(hash, &e_byte, 1)) {
+ SM2err(SM2_F_SM2_COMPUTE_USERID_DIGEST, ERR_R_EVP_LIB);
goto done;
+ }
e_byte = entla & 0xFF;
- if (EVP_DigestUpdate(hash, &e_byte, 1) == 0)
+ if (!EVP_DigestUpdate(hash, &e_byte, 1)
+ || !EVP_DigestUpdate(hash, user_id, uid_len)) {
+ SM2err(SM2_F_SM2_COMPUTE_USERID_DIGEST, ERR_R_EVP_LIB);
goto done;
+ }
- if (EVP_DigestUpdate(hash, user_id, uid_len) == 0)
- goto done;
-
- if (EC_GROUP_get_curve_GFp(group, p, a, b, ctx) == 0)
+ if (!EC_GROUP_get_curve_GFp(group, p, a, b, ctx)) {
+ SM2err(SM2_F_SM2_COMPUTE_USERID_DIGEST, ERR_R_EC_LIB);
goto done;
+ }
p_bytes = BN_num_bytes(p);
buf = OPENSSL_zalloc(p_bytes);
-
- BN_bn2binpad(a, buf, p_bytes);
- if (EVP_DigestUpdate(hash, buf, p_bytes) == 0)
- goto done;
- BN_bn2binpad(b, buf, p_bytes);
- if (EVP_DigestUpdate(hash, buf, p_bytes) == 0)
- goto done;
- EC_POINT_get_affine_coordinates_GFp(group,
- EC_GROUP_get0_generator(group),
- xG, yG, ctx);
- BN_bn2binpad(xG, buf, p_bytes);
- if (EVP_DigestUpdate(hash, buf, p_bytes) == 0)
- goto done;
- BN_bn2binpad(yG, buf, p_bytes);
- if (EVP_DigestUpdate(hash, buf, p_bytes) == 0)
+ if (buf == NULL) {
+ SM2err(SM2_F_SM2_COMPUTE_USERID_DIGEST, ERR_R_MALLOC_FAILURE);
goto done;
-
- EC_POINT_get_affine_coordinates_GFp(group,
- EC_KEY_get0_public_key(key),
- xA, yA, ctx);
- BN_bn2binpad(xA, buf, p_bytes);
- if (EVP_DigestUpdate(hash, buf, p_bytes) == 0)
- goto done;
- BN_bn2binpad(yA, buf, p_bytes);
- if (EVP_DigestUpdate(hash, buf, p_bytes) == 0)
- goto done;
-
- if (EVP_DigestFinal(hash, out, NULL) == 0)
+ }
+
+ if (BN_bn2binpad(a, buf, p_bytes) < 0
+ || !EVP_DigestUpdate(hash, buf, p_bytes)
+ || BN_bn2binpad(b, buf, p_bytes) < 0
+ || !EVP_DigestUpdate(hash, buf, p_bytes)
+ || !EC_POINT_get_affine_coordinates_GFp(group,
+ EC_GROUP_get0_generator(group),
+ xG, yG, ctx)
+ || BN_bn2binpad(xG, buf, p_bytes) < 0
+ || !EVP_DigestUpdate(hash, buf, p_bytes)
+ || BN_bn2binpad(yG, buf, p_bytes) < 0
+ || !EVP_DigestUpdate(hash, buf, p_bytes)
+ || !EC_POINT_get_affine_coordinates_GFp(group,
+ EC_KEY_get0_public_key(key),
+ xA, yA, ctx)
+ || BN_bn2binpad(xA, buf, p_bytes) < 0
+ || !EVP_DigestUpdate(hash, buf, p_bytes)
+ || BN_bn2binpad(yA, buf, p_bytes) < 0
+ || !EVP_DigestUpdate(hash, buf, p_bytes)
+ || !EVP_DigestFinal(hash, out, NULL)) {
+ SM2err(SM2_F_SM2_COMPUTE_USERID_DIGEST, ERR_R_INTERNAL_ERROR);
goto done;
+ }
rc = 1;
projects / openssl.git / commitdiff