+
+#endif
+
+
+int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a, ASN1_BIT_STRING *signature,
+ void *asn, EVP_PKEY *pkey)
+ {
+ EVP_MD_CTX ctx;
+ const EVP_MD *type;
+ unsigned char *buf_in=NULL;
+ int ret= -1,i,inl;
+
+ EVP_MD_CTX_init(&ctx);
+ i=OBJ_obj2nid(a->algorithm);
+ type=EVP_get_digestbyname(OBJ_nid2sn(i));
+ if (type == NULL)
+ {
+ ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
+ goto err;
+ }
+
+ inl = ASN1_item_i2d(asn, &buf_in, it);
+
+ if (buf_in == NULL)
+ {
+ ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ EVP_VerifyInit(&ctx,type);
+ EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl);
+
+ memset(buf_in,0,(unsigned int)inl);
+ OPENSSL_free(buf_in);
+
+ if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data,
+ (unsigned int)signature->length,pkey) <= 0)
+ {
+ ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB);
+ ret=0;
+ goto err;
+ }
+ /* we don't need to zero the 'ctx' because we just checked
+ * public information */
+ /* memset(&ctx,0,sizeof(ctx)); */
+ ret=1;
+err:
+ EVP_MD_CTX_cleanup(&ctx);
+ return(ret);
+ }
+
+