| /* |
| * Copyright 2008-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include "internal/cryptlib.h" |
| #include <openssl/asn1t.h> |
| #include <openssl/pem.h> |
| #include <openssl/x509v3.h> |
| #include <openssl/err.h> |
| #include <openssl/cms.h> |
| #include "cms_local.h" |
| |
| /* CMS DigestedData Utilities */ |
| |
| CMS_ContentInfo *ossl_cms_DigestedData_create(const EVP_MD *md, |
| OSSL_LIB_CTX *libctx, |
| const char *propq) |
| { |
| CMS_ContentInfo *cms; |
| CMS_DigestedData *dd; |
| |
| cms = CMS_ContentInfo_new_ex(libctx, propq); |
| if (cms == NULL) |
| return NULL; |
| |
| dd = M_ASN1_new_of(CMS_DigestedData); |
| |
| if (dd == NULL) |
| goto err; |
| |
| cms->contentType = OBJ_nid2obj(NID_pkcs7_digest); |
| cms->d.digestedData = dd; |
| |
| dd->version = 0; |
| dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data); |
| |
| X509_ALGOR_set_md(dd->digestAlgorithm, md); |
| |
| return cms; |
| |
| err: |
| CMS_ContentInfo_free(cms); |
| return NULL; |
| } |
| |
| BIO *ossl_cms_DigestedData_init_bio(const CMS_ContentInfo *cms) |
| { |
| CMS_DigestedData *dd = cms->d.digestedData; |
| |
| return ossl_cms_DigestAlgorithm_init_bio(dd->digestAlgorithm, |
| ossl_cms_get0_cmsctx(cms)); |
| } |
| |
| int ossl_cms_DigestedData_do_final(const CMS_ContentInfo *cms, BIO *chain, |
| int verify) |
| { |
| EVP_MD_CTX *mctx = EVP_MD_CTX_new(); |
| unsigned char md[EVP_MAX_MD_SIZE]; |
| unsigned int mdlen; |
| int r = 0; |
| CMS_DigestedData *dd; |
| |
| if (mctx == NULL) { |
| ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| dd = cms->d.digestedData; |
| |
| if (!ossl_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) { |
| ERR_raise(ERR_LIB_CMS, CMS_R_MESSAGEDIGEST_WRONG_LENGTH); |
| goto err; |
| } |
| |
| if (memcmp(md, dd->digest->data, mdlen)) |
| ERR_raise(ERR_LIB_CMS, CMS_R_VERIFICATION_FAILURE); |
| else |
| r = 1; |
| } else { |
| if (!ASN1_STRING_set(dd->digest, md, mdlen)) |
| goto err; |
| r = 1; |
| } |
| |
| err: |
| EVP_MD_CTX_free(mctx); |
| |
| return r; |
| |
| } |