| /* 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 "../evp/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; |
| |
| 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 (!EVP_DigestVerifyInitFromAlgorithm(&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_DigestVerifyUpdate(&ctx, buf_in, inl)) { |
| OPENSSL_cleanse(buf_in, (unsigned int)inl); |
| OPENSSL_free(buf_in); |
| OPENSSL_PUT_ERROR(X509, ERR_R_EVP_LIB); |
| goto err; |
| } |
| |
| OPENSSL_cleanse(buf_in, (unsigned int)inl); |
| OPENSSL_free(buf_in); |
| |
| if (EVP_DigestVerifyFinal(&ctx, signature->data, |
| (size_t)signature->length) <= 0) { |
| OPENSSL_PUT_ERROR(X509, ERR_R_EVP_LIB); |
| 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; |
| } |