/* crypto/cms/cms_dd.c */ /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL * project. */ /* ==================================================================== * Copyright (c) 2008 The OpenSSL Project. All rights reserved. * * 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 above 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 acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED 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 OpenSSL PROJECT OR * ITS 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. * ==================================================================== */ #include "cryptlib.h" #include <openssl/asn1t.h> #include <openssl/pem.h> #include <openssl/x509v3.h> #include <openssl/err.h> #include <openssl/cms.h> #include "cms_lcl.h" DECLARE_ASN1_ITEM(CMS_DigestedData) /* CMS DigestedData Utilities */ CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md) { CMS_ContentInfo *cms; CMS_DigestedData *dd; cms = CMS_ContentInfo_new(); if (!cms) return NULL; dd = M_ASN1_new_of(CMS_DigestedData); if (!dd) goto err; cms->contentType = OBJ_nid2obj(NID_pkcs7_digest); cms->d.digestedData = dd; dd->version = 0; dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data); cms_DigestAlgorithm_set(dd->digestAlgorithm, md); return cms; err: if (cms) CMS_ContentInfo_free(cms); return NULL; } BIO *cms_DigestedData_init_bio(CMS_ContentInfo *cms) { CMS_DigestedData *dd; dd = cms->d.digestedData; return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm); } int cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify) { EVP_MD_CTX mctx; unsigned char md[EVP_MAX_MD_SIZE]; unsigned int mdlen; int r = 0; CMS_DigestedData *dd; EVP_MD_CTX_init(&mctx); dd = cms->d.digestedData; if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, dd->digestAlgorithm)) goto err; if (EVP_DigestFinal_ex(&mctx, md, &mdlen) <= 0) goto err; if (verify) { if (mdlen != (unsigned int)dd->digest->length) { CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, CMS_R_MESSAGEDIGEST_WRONG_LENGTH); goto err; } if (memcmp(md, dd->digest->data, mdlen)) CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, CMS_R_VERIFICATION_FAILURE); else r = 1; } else { if (!ASN1_STRING_set(dd->digest, md, mdlen)) goto err; r = 1; } err: EVP_MD_CTX_cleanup(&mctx); return r; }