1 /* $OpenBSD: cms_dd.c,v 1.4 2014/07/11 08:44:48 jsing Exp $ */ 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 2008 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 */ 53 54 #include <openssl/asn1t.h> 55 #include <openssl/cms.h> 56 #include <openssl/err.h> 57 #include <openssl/pem.h> 58 #include <openssl/x509v3.h> 59 60 #include "cms_lcl.h" 61 62 DECLARE_ASN1_ITEM(CMS_DigestedData) 63 64 /* CMS DigestedData Utilities */ 65 66 CMS_ContentInfo * 67 cms_DigestedData_create(const EVP_MD *md) 68 { 69 CMS_ContentInfo *cms; 70 CMS_DigestedData *dd; 71 72 cms = CMS_ContentInfo_new(); 73 if (!cms) 74 return NULL; 75 76 dd = M_ASN1_new_of(CMS_DigestedData); 77 78 if (!dd) 79 goto err; 80 81 cms->contentType = OBJ_nid2obj(NID_pkcs7_digest); 82 cms->d.digestedData = dd; 83 84 dd->version = 0; 85 dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data); 86 87 cms_DigestAlgorithm_set(dd->digestAlgorithm, md); 88 89 return cms; 90 91 err: 92 if (cms) 93 CMS_ContentInfo_free(cms); 94 return NULL; 95 } 96 97 BIO * 98 cms_DigestedData_init_bio(CMS_ContentInfo *cms) 99 { 100 CMS_DigestedData *dd; 101 102 dd = cms->d.digestedData; 103 return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm); 104 } 105 106 int 107 cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify) 108 { 109 EVP_MD_CTX mctx; 110 unsigned char md[EVP_MAX_MD_SIZE]; 111 unsigned int mdlen; 112 int r = 0; 113 CMS_DigestedData *dd; 114 115 EVP_MD_CTX_init(&mctx); 116 117 dd = cms->d.digestedData; 118 119 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, dd->digestAlgorithm)) 120 goto err; 121 122 if (EVP_DigestFinal_ex(&mctx, md, &mdlen) <= 0) 123 goto err; 124 125 if (verify) { 126 if (mdlen != (unsigned int)dd->digest->length) { 127 CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, 128 CMS_R_MESSAGEDIGEST_WRONG_LENGTH); 129 goto err; 130 } 131 132 if (memcmp(md, dd->digest->data, mdlen)) 133 CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, 134 CMS_R_VERIFICATION_FAILURE); 135 else 136 r = 1; 137 } else { 138 if (!ASN1_STRING_set(dd->digest, md, mdlen)) 139 goto err; 140 r = 1; 141 } 142 143 err: 144 EVP_MD_CTX_cleanup(&mctx); 145 146 return r; 147 } 148