| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 4 | * Licensed under the OpenSSL license (the "License"). You may not use |
| 5 | * this file except in compliance with the License. You can obtain a copy |
| 6 | * in the file LICENSE in the source distribution or at |
| 7 | * https://www.openssl.org/source/license.html |
| 8 | */ |
| 9 | |
| 10 | #include "internal/cryptlib.h" |
| 11 | #include <openssl/asn1t.h> |
| 12 | #include <openssl/pem.h> |
| 13 | #include <openssl/x509v3.h> |
| 14 | #include <openssl/err.h> |
| 15 | #include <openssl/cms.h> |
| 16 | #include "cms_local.h" |
| 17 | |
| 18 | /* CMS DigestedData Utilities */ |
| 19 | |
| 20 | CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md) |
| 21 | { |
| 22 | CMS_ContentInfo *cms; |
| 23 | CMS_DigestedData *dd; |
| 24 | cms = CMS_ContentInfo_new(); |
| 25 | if (cms == NULL) |
| 26 | return NULL; |
| 27 | |
| 28 | dd = M_ASN1_new_of(CMS_DigestedData); |
| 29 | |
| 30 | if (dd == NULL) |
| 31 | goto err; |
| 32 | |
| 33 | cms->contentType = OBJ_nid2obj(NID_pkcs7_digest); |
| 34 | cms->d.digestedData = dd; |
| 35 | |
| 36 | dd->version = 0; |
| 37 | dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data); |
| 38 | |
| 39 | X509_ALGOR_set_md(dd->digestAlgorithm, md); |
| 40 | |
| 41 | return cms; |
| 42 | |
| 43 | err: |
| 44 | CMS_ContentInfo_free(cms); |
| 45 | return NULL; |
| 46 | } |
| 47 | |
| 48 | BIO *cms_DigestedData_init_bio(CMS_ContentInfo *cms) |
| 49 | { |
| 50 | CMS_DigestedData *dd; |
| 51 | dd = cms->d.digestedData; |
| 52 | return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm); |
| 53 | } |
| 54 | |
| 55 | int cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify) |
| 56 | { |
| 57 | EVP_MD_CTX *mctx = EVP_MD_CTX_new(); |
| 58 | unsigned char md[EVP_MAX_MD_SIZE]; |
| 59 | unsigned int mdlen; |
| 60 | int r = 0; |
| 61 | CMS_DigestedData *dd; |
| 62 | |
| 63 | if (mctx == NULL) { |
| 64 | CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, ERR_R_MALLOC_FAILURE); |
| 65 | goto err; |
| 66 | } |
| 67 | |
| 68 | dd = cms->d.digestedData; |
| 69 | |
| 70 | if (!cms_DigestAlgorithm_find_ctx(mctx, chain, dd->digestAlgorithm)) |
| 71 | goto err; |
| 72 | |
| 73 | if (EVP_DigestFinal_ex(mctx, md, &mdlen) <= 0) |
| 74 | goto err; |
| 75 | |
| 76 | if (verify) { |
| 77 | if (mdlen != (unsigned int)dd->digest->length) { |
| 78 | CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, |
| 79 | CMS_R_MESSAGEDIGEST_WRONG_LENGTH); |
| 80 | goto err; |
| 81 | } |
| 82 | |
| 83 | if (memcmp(md, dd->digest->data, mdlen)) |
| 84 | CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, |
| 85 | CMS_R_VERIFICATION_FAILURE); |
| 86 | else |
| 87 | r = 1; |
| 88 | } else { |
| 89 | if (!ASN1_STRING_set(dd->digest, md, mdlen)) |
| 90 | goto err; |
| 91 | r = 1; |
| 92 | } |
| 93 | |
| 94 | err: |
| 95 | EVP_MD_CTX_free(mctx); |
| 96 | |
| 97 | return r; |
| 98 | |
| 99 | } |