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Add accurate asn.1 siganture/ciphertext size

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This commit is contained in:
Zhi Guan
2018-12-04 15:56:21 +08:00
parent c0ee87b077
commit bc2bb8a335
13 changed files with 5628 additions and 131 deletions
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19
crypto/sm9/sm9_enc.c
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@@ -337,6 +337,11 @@ end:
return ret;
}
int SM9_MASTER_KEY_ciphertext_size(const SM9_MASTER_KEY *master, size_t len)
{
}
int SM9_encrypt(int type,
const unsigned char *in, size_t inlen,
unsigned char *out, size_t *outlen,
@@ -456,6 +461,11 @@ int SM9_decrypt(int type,
return 0;
}
if (!in || !outlen || !sk) {
SM9err(SM9_F_SM9_DECRYPT, ERR_R_PASSED_NULL_PARAMETER);
goto end;
}
/* decode sm9 ciphertext */
if (!(sm9cipher = d2i_SM9Ciphertext(NULL, &in, inlen))) {
SM9err(SM9_F_SM9_DECRYPT, ERR_R_SM9_LIB);
@@ -464,6 +474,15 @@ int SM9_decrypt(int type,
C2 = ASN1_STRING_get0_data(sm9cipher->c2);
C2_len = ASN1_STRING_length(sm9cipher->c2);
/* check/return output length */
if (!out) {
*outlen = C2_len;
ret = 1;
goto end;
} else if (*outlen < C2_len) {
SM9err(SM9_F_SM9_DECRYPT, SM9_R_BUFFER_TOO_SMALL);
goto end;
}
/* unwrap key */
keylen = C2_len + EVP_MD_size(md);