/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <openssl/x509.h> #include <stdio.h> #include <time.h> #include <sys/types.h> #include <openssl/bn.h> #include <openssl/buf.h> #include <openssl/digest.h> #include <openssl/err.h> #include <openssl/evp.h> #include <openssl/mem.h> #include <openssl/obj.h> #include "internal.h" int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a, ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey) { EVP_MD_CTX ctx; uint8_t *buf_in = NULL; int ret = 0, inl = 0; if (!pkey) { OPENSSL_PUT_ERROR(X509, ERR_R_PASSED_NULL_PARAMETER); return 0; } if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7) { OPENSSL_PUT_ERROR(X509, X509_R_INVALID_BIT_STRING_BITS_LEFT); return 0; } EVP_MD_CTX_init(&ctx); if (!x509_digest_verify_init(&ctx, a, pkey)) { goto err; } inl = ASN1_item_i2d(asn, &buf_in, it); if (buf_in == NULL) { OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE); goto err; } if (!EVP_DigestVerify(&ctx, signature->data, (size_t)signature->length, buf_in, inl)) { OPENSSL_PUT_ERROR(X509, ERR_R_EVP_LIB); goto err; } ret = 1; err: OPENSSL_free(buf_in); EVP_MD_CTX_cleanup(&ctx); return ret; }