1/* crypto/cms/cms_dd.c */ 2/* 3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 4 * project. 5 */ 6/* ==================================================================== 7 * Copyright (c) 2008 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * licensing@OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 */ 54 55#include "cryptlib.h" 56#include <openssl/asn1t.h> 57#include <openssl/pem.h> 58#include <openssl/x509v3.h> 59#include <openssl/err.h> 60#include <openssl/cms.h> 61#include "cms_lcl.h" 62 63DECLARE_ASN1_ITEM(CMS_DigestedData) 64 65/* CMS DigestedData Utilities */ 66 67CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md) 68{ 69 CMS_ContentInfo *cms; 70 CMS_DigestedData *dd; 71 cms = CMS_ContentInfo_new(); 72 if (!cms) 73 return NULL; 74 75 dd = M_ASN1_new_of(CMS_DigestedData); 76 77 if (!dd) 78 goto err; 79 80 cms->contentType = OBJ_nid2obj(NID_pkcs7_digest); 81 cms->d.digestedData = dd; 82 83 dd->version = 0; 84 dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data); 85 86 cms_DigestAlgorithm_set(dd->digestAlgorithm, md); 87 88 return cms; 89 90 err: 91 92 if (cms) 93 CMS_ContentInfo_free(cms); 94 95 return NULL; 96} 97 98BIO *cms_DigestedData_init_bio(CMS_ContentInfo *cms) 99{ 100 CMS_DigestedData *dd; 101 dd = cms->d.digestedData; 102 return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm); 103} 104 105int cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify) 106{ 107 EVP_MD_CTX mctx; 108 unsigned char md[EVP_MAX_MD_SIZE]; 109 unsigned int mdlen; 110 int r = 0; 111 CMS_DigestedData *dd; 112 EVP_MD_CTX_init(&mctx); 113 114 dd = cms->d.digestedData; 115 116 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, dd->digestAlgorithm)) 117 goto err; 118 119 if (EVP_DigestFinal_ex(&mctx, md, &mdlen) <= 0) 120 goto err; 121 122 if (verify) { 123 if (mdlen != (unsigned int)dd->digest->length) { 124 CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, 125 CMS_R_MESSAGEDIGEST_WRONG_LENGTH); 126 goto err; 127 } 128 129 if (memcmp(md, dd->digest->data, mdlen)) 130 CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, 131 CMS_R_VERIFICATION_FAILURE); 132 else 133 r = 1; 134 } else { 135 if (!ASN1_STRING_set(dd->digest, md, mdlen)) 136 goto err; 137 r = 1; 138 } 139 140 err: 141 EVP_MD_CTX_cleanup(&mctx); 142 143 return r; 144 145} 146