(ASN1_ITEM_rptr(X509), type, (char *)data, md, len));
}
+/* calculate cert digest using the same hash algorithm as in its signature */
+ASN1_OCTET_STRING *X509_digest_sig(const X509 *cert)
+{
+ unsigned int len;
+ unsigned char hash[EVP_MAX_MD_SIZE];
+ int md_NID;
+ const EVP_MD *md = NULL;
+ ASN1_OCTET_STRING *new = NULL;
+
+ if (cert == NULL) {
+ X509err(0, ERR_R_PASSED_NULL_PARAMETER);
+ return NULL;
+ }
+
+ if (!OBJ_find_sigid_algs(X509_get_signature_nid(cert), &md_NID, NULL)
+ || (md = EVP_get_digestbynid(md_NID)) == NULL) {
+ CMPerr(0, X509_R_UNSUPPORTED_ALGORITHM);
+ return NULL;
+ }
+ if (!X509_digest(cert, md, hash, &len)
+ || (new = ASN1_OCTET_STRING_new()) == NULL)
+ return NULL;
+ if (!(ASN1_OCTET_STRING_set(new, hash, len))) {
+ ASN1_OCTET_STRING_free(new);
+ return NULL;
+ }
+ return new;
+}
+
int X509_CRL_digest(const X509_CRL *data, const EVP_MD *type,
unsigned char *md, unsigned int *len)
{