| 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_lcl.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 | }
|
|---|
