[331] | 1 | /*
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| 2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /* Simple PKCS#7 processing functions */
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| 11 |
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| 12 | #include <stdio.h>
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| 13 | #include "internal/cryptlib.h"
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| 14 | #include <openssl/x509.h>
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| 15 | #include <openssl/x509v3.h>
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| 16 |
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| 17 |
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| 18 | #define BUFFERSIZE 4096
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| 19 |
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| 20 | static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);
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| 21 |
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| 22 | PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
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| 23 | BIO *data, int flags)
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| 24 | {
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| 25 | PKCS7 *p7;
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| 26 | int i;
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| 27 |
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| 28 | if ((p7 = PKCS7_new()) == NULL) {
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| 29 | PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
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| 30 | return NULL;
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| 31 | }
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| 32 |
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| 33 | if (!PKCS7_set_type(p7, NID_pkcs7_signed))
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| 34 | goto err;
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| 35 |
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| 36 | if (!PKCS7_content_new(p7, NID_pkcs7_data))
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| 37 | goto err;
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| 38 |
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| 39 | if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) {
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| 40 | PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
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| 41 | goto err;
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| 42 | }
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| 43 |
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| 44 | if (!(flags & PKCS7_NOCERTS)) {
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| 45 | for (i = 0; i < sk_X509_num(certs); i++) {
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| 46 | if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
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| 47 | goto err;
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| 48 | }
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| 49 | }
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| 50 |
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| 51 | if (flags & PKCS7_DETACHED)
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| 52 | PKCS7_set_detached(p7, 1);
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| 53 |
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| 54 | if (flags & (PKCS7_STREAM | PKCS7_PARTIAL))
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| 55 | return p7;
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| 56 |
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| 57 | if (PKCS7_final(p7, data, flags))
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| 58 | return p7;
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| 59 |
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| 60 | err:
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| 61 | PKCS7_free(p7);
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| 62 | return NULL;
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| 63 | }
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| 64 |
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| 65 | int PKCS7_final(PKCS7 *p7, BIO *data, int flags)
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| 66 | {
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| 67 | BIO *p7bio;
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| 68 | int ret = 0;
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| 69 |
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| 70 | if ((p7bio = PKCS7_dataInit(p7, NULL)) == NULL) {
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| 71 | PKCS7err(PKCS7_F_PKCS7_FINAL, ERR_R_MALLOC_FAILURE);
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| 72 | return 0;
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| 73 | }
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| 74 |
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| 75 | SMIME_crlf_copy(data, p7bio, flags);
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| 76 |
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| 77 | (void)BIO_flush(p7bio);
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| 78 |
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| 79 | if (!PKCS7_dataFinal(p7, p7bio)) {
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| 80 | PKCS7err(PKCS7_F_PKCS7_FINAL, PKCS7_R_PKCS7_DATASIGN);
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| 81 | goto err;
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| 82 | }
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| 83 |
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| 84 | ret = 1;
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| 85 |
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| 86 | err:
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| 87 | BIO_free_all(p7bio);
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| 88 |
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| 89 | return ret;
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| 90 |
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| 91 | }
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| 92 |
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| 93 | /* Check to see if a cipher exists and if so add S/MIME capabilities */
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| 94 |
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| 95 | static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
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| 96 | {
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| 97 | if (EVP_get_cipherbynid(nid))
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| 98 | return PKCS7_simple_smimecap(sk, nid, arg);
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| 99 | return 1;
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| 100 | }
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| 101 |
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| 102 | static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
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| 103 | {
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| 104 | if (EVP_get_digestbynid(nid))
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| 105 | return PKCS7_simple_smimecap(sk, nid, arg);
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| 106 | return 1;
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| 107 | }
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| 108 |
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| 109 | PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
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| 110 | EVP_PKEY *pkey, const EVP_MD *md,
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| 111 | int flags)
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| 112 | {
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| 113 | PKCS7_SIGNER_INFO *si = NULL;
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| 114 | STACK_OF(X509_ALGOR) *smcap = NULL;
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| 115 | if (!X509_check_private_key(signcert, pkey)) {
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| 116 | PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
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| 117 | PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
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| 118 | return NULL;
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| 119 | }
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| 120 |
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| 121 | if ((si = PKCS7_add_signature(p7, signcert, pkey, md)) == NULL) {
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| 122 | PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
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| 123 | PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
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| 124 | return NULL;
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| 125 | }
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| 126 |
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| 127 | if (!(flags & PKCS7_NOCERTS)) {
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| 128 | if (!PKCS7_add_certificate(p7, signcert))
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| 129 | goto err;
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| 130 | }
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| 131 |
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| 132 | if (!(flags & PKCS7_NOATTR)) {
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| 133 | if (!PKCS7_add_attrib_content_type(si, NULL))
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| 134 | goto err;
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| 135 | /* Add SMIMECapabilities */
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| 136 | if (!(flags & PKCS7_NOSMIMECAP)) {
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| 137 | if ((smcap = sk_X509_ALGOR_new_null()) == NULL) {
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| 138 | PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
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| 139 | goto err;
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| 140 | }
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| 141 | if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
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| 142 | || !add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1)
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| 143 | || !add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1)
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| 144 | || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
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| 145 | || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
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| 146 | || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
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| 147 | || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
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| 148 | || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
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| 149 | || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
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| 150 | || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
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| 151 | || !add_cipher_smcap(smcap, NID_des_cbc, -1)
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| 152 | || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
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| 153 | || !PKCS7_add_attrib_smimecap(si, smcap))
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| 154 | goto err;
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| 155 | sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
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| 156 | smcap = NULL;
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| 157 | }
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| 158 | if (flags & PKCS7_REUSE_DIGEST) {
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| 159 | if (!pkcs7_copy_existing_digest(p7, si))
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| 160 | goto err;
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| 161 | if (!(flags & PKCS7_PARTIAL) && !PKCS7_SIGNER_INFO_sign(si))
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| 162 | goto err;
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| 163 | }
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| 164 | }
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| 165 | return si;
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| 166 | err:
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| 167 | sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
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| 168 | return NULL;
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| 169 | }
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| 170 |
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| 171 | /*
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| 172 | * Search for a digest matching SignerInfo digest type and if found copy
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| 173 | * across.
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| 174 | */
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| 175 |
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| 176 | static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
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| 177 | {
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| 178 | int i;
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| 179 | STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
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| 180 | PKCS7_SIGNER_INFO *sitmp;
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| 181 | ASN1_OCTET_STRING *osdig = NULL;
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| 182 | sinfos = PKCS7_get_signer_info(p7);
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| 183 | for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
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| 184 | sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
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| 185 | if (si == sitmp)
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| 186 | break;
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| 187 | if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
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| 188 | continue;
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| 189 | if (!OBJ_cmp(si->digest_alg->algorithm, sitmp->digest_alg->algorithm)) {
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| 190 | osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
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| 191 | break;
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| 192 | }
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| 193 |
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| 194 | }
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| 195 |
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| 196 | if (osdig)
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| 197 | return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
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| 198 |
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| 199 | PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
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| 200 | PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
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| 201 | return 0;
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| 202 | }
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| 203 |
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| 204 | int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
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| 205 | BIO *indata, BIO *out, int flags)
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| 206 | {
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| 207 | STACK_OF(X509) *signers;
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| 208 | X509 *signer;
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| 209 | STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
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| 210 | PKCS7_SIGNER_INFO *si;
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| 211 | X509_STORE_CTX *cert_ctx = NULL;
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| 212 | char *buf = NULL;
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| 213 | int i, j = 0, k, ret = 0;
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| 214 | BIO *p7bio = NULL;
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| 215 | BIO *tmpin = NULL, *tmpout = NULL;
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| 216 |
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| 217 | if (!p7) {
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| 218 | PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
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| 219 | return 0;
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| 220 | }
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| 221 |
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| 222 | if (!PKCS7_type_is_signed(p7)) {
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| 223 | PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
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| 224 | return 0;
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| 225 | }
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| 226 |
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| 227 | /* Check for no data and no content: no data to verify signature */
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| 228 | if (PKCS7_get_detached(p7) && !indata) {
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| 229 | PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
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| 230 | return 0;
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| 231 | }
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| 232 |
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| 233 | if (flags & PKCS7_NO_DUAL_CONTENT) {
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| 234 | /*
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| 235 | * This was originally "#if 0" because we thought that only old broken
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| 236 | * Netscape did this. It turns out that Authenticode uses this kind
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| 237 | * of "extended" PKCS7 format, and things like UEFI secure boot and
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| 238 | * tools like osslsigncode need it. In Authenticode the verification
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| 239 | * process is different, but the existing PKCs7 verification works.
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| 240 | */
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| 241 | if (!PKCS7_get_detached(p7) && indata) {
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| 242 | PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
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| 243 | return 0;
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| 244 | }
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| 245 | }
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| 246 |
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| 247 | sinfos = PKCS7_get_signer_info(p7);
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| 248 |
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| 249 | if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
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| 250 | PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
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| 251 | return 0;
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| 252 | }
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| 253 |
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| 254 | signers = PKCS7_get0_signers(p7, certs, flags);
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| 255 | if (!signers)
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| 256 | return 0;
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| 257 |
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| 258 | /* Now verify the certificates */
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| 259 |
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| 260 | cert_ctx = X509_STORE_CTX_new();
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| 261 | if (cert_ctx == NULL)
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| 262 | goto err;
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| 263 | if (!(flags & PKCS7_NOVERIFY))
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| 264 | for (k = 0; k < sk_X509_num(signers); k++) {
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| 265 | signer = sk_X509_value(signers, k);
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| 266 | if (!(flags & PKCS7_NOCHAIN)) {
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| 267 | if (!X509_STORE_CTX_init(cert_ctx, store, signer,
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| 268 | p7->d.sign->cert)) {
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| 269 | PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
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| 270 | goto err;
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| 271 | }
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| 272 | X509_STORE_CTX_set_default(cert_ctx, "smime_sign");
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| 273 | } else if (!X509_STORE_CTX_init(cert_ctx, store, signer, NULL)) {
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| 274 | PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
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| 275 | goto err;
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| 276 | }
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| 277 | if (!(flags & PKCS7_NOCRL))
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| 278 | X509_STORE_CTX_set0_crls(cert_ctx, p7->d.sign->crl);
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| 279 | i = X509_verify_cert(cert_ctx);
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| 280 | if (i <= 0)
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| 281 | j = X509_STORE_CTX_get_error(cert_ctx);
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| 282 | X509_STORE_CTX_cleanup(cert_ctx);
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| 283 | if (i <= 0) {
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| 284 | PKCS7err(PKCS7_F_PKCS7_VERIFY,
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| 285 | PKCS7_R_CERTIFICATE_VERIFY_ERROR);
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| 286 | ERR_add_error_data(2, "Verify error:",
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| 287 | X509_verify_cert_error_string(j));
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| 288 | goto err;
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| 289 | }
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| 290 | /* Check for revocation status here */
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| 291 | }
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| 292 |
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| 293 | /*
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| 294 | * Performance optimization: if the content is a memory BIO then store
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| 295 | * its contents in a temporary read only memory BIO. This avoids
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| 296 | * potentially large numbers of slow copies of data which will occur when
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| 297 | * reading from a read write memory BIO when signatures are calculated.
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| 298 | */
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| 299 |
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| 300 | if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
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| 301 | char *ptr;
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| 302 | long len;
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| 303 | len = BIO_get_mem_data(indata, &ptr);
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| 304 | tmpin = BIO_new_mem_buf(ptr, len);
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| 305 | if (tmpin == NULL) {
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| 306 | PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
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| 307 | goto err;
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| 308 | }
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| 309 | } else
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| 310 | tmpin = indata;
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| 311 |
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| 312 | if ((p7bio = PKCS7_dataInit(p7, tmpin)) == NULL)
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| 313 | goto err;
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| 314 |
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| 315 | if (flags & PKCS7_TEXT) {
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| 316 | if ((tmpout = BIO_new(BIO_s_mem())) == NULL) {
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| 317 | PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
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| 318 | goto err;
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| 319 | }
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| 320 | BIO_set_mem_eof_return(tmpout, 0);
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| 321 | } else
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| 322 | tmpout = out;
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| 323 |
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| 324 | /* We now have to 'read' from p7bio to calculate digests etc. */
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| 325 | if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
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| 326 | PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
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| 327 | goto err;
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| 328 | }
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| 329 | for (;;) {
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| 330 | i = BIO_read(p7bio, buf, BUFFERSIZE);
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| 331 | if (i <= 0)
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| 332 | break;
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| 333 | if (tmpout)
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| 334 | BIO_write(tmpout, buf, i);
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| 335 | }
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| 336 |
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| 337 | if (flags & PKCS7_TEXT) {
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| 338 | if (!SMIME_text(tmpout, out)) {
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| 339 | PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
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| 340 | BIO_free(tmpout);
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| 341 | goto err;
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| 342 | }
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| 343 | BIO_free(tmpout);
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| 344 | }
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| 345 |
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| 346 | /* Now Verify All Signatures */
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| 347 | if (!(flags & PKCS7_NOSIGS))
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| 348 | for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
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| 349 | si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
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| 350 | signer = sk_X509_value(signers, i);
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| 351 | j = PKCS7_signatureVerify(p7bio, p7, si, signer);
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| 352 | if (j <= 0) {
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| 353 | PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
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| 354 | goto err;
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| 355 | }
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| 356 | }
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| 357 |
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| 358 | ret = 1;
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| 359 |
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| 360 | err:
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| 361 | X509_STORE_CTX_free(cert_ctx);
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| 362 | OPENSSL_free(buf);
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| 363 | if (tmpin == indata) {
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| 364 | if (indata)
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| 365 | BIO_pop(p7bio);
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| 366 | }
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| 367 | BIO_free_all(p7bio);
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| 368 | sk_X509_free(signers);
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| 369 | return ret;
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| 370 | }
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| 371 |
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| 372 | STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs,
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| 373 | int flags)
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| 374 | {
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| 375 | STACK_OF(X509) *signers;
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| 376 | STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
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| 377 | PKCS7_SIGNER_INFO *si;
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| 378 | PKCS7_ISSUER_AND_SERIAL *ias;
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| 379 | X509 *signer;
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| 380 | int i;
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| 381 |
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| 382 | if (!p7) {
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| 383 | PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
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| 384 | return NULL;
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| 385 | }
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| 386 |
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| 387 | if (!PKCS7_type_is_signed(p7)) {
|
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| 388 | PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
|
---|
| 389 | return NULL;
|
---|
| 390 | }
|
---|
| 391 |
|
---|
| 392 | /* Collect all the signers together */
|
---|
| 393 |
|
---|
| 394 | sinfos = PKCS7_get_signer_info(p7);
|
---|
| 395 |
|
---|
| 396 | if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
|
---|
| 397 | PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
|
---|
| 398 | return 0;
|
---|
| 399 | }
|
---|
| 400 |
|
---|
| 401 | if ((signers = sk_X509_new_null()) == NULL) {
|
---|
| 402 | PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
|
---|
| 403 | return NULL;
|
---|
| 404 | }
|
---|
| 405 |
|
---|
| 406 | for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
|
---|
| 407 | si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
|
---|
| 408 | ias = si->issuer_and_serial;
|
---|
| 409 | signer = NULL;
|
---|
| 410 | /* If any certificates passed they take priority */
|
---|
| 411 | if (certs)
|
---|
| 412 | signer = X509_find_by_issuer_and_serial(certs,
|
---|
| 413 | ias->issuer, ias->serial);
|
---|
| 414 | if (!signer && !(flags & PKCS7_NOINTERN)
|
---|
| 415 | && p7->d.sign->cert)
|
---|
| 416 | signer =
|
---|
| 417 | X509_find_by_issuer_and_serial(p7->d.sign->cert,
|
---|
| 418 | ias->issuer, ias->serial);
|
---|
| 419 | if (!signer) {
|
---|
| 420 | PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
|
---|
| 421 | PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
|
---|
| 422 | sk_X509_free(signers);
|
---|
| 423 | return 0;
|
---|
| 424 | }
|
---|
| 425 |
|
---|
| 426 | if (!sk_X509_push(signers, signer)) {
|
---|
| 427 | sk_X509_free(signers);
|
---|
| 428 | return NULL;
|
---|
| 429 | }
|
---|
| 430 | }
|
---|
| 431 | return signers;
|
---|
| 432 | }
|
---|
| 433 |
|
---|
| 434 | /* Build a complete PKCS#7 enveloped data */
|
---|
| 435 |
|
---|
| 436 | PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
|
---|
| 437 | int flags)
|
---|
| 438 | {
|
---|
| 439 | PKCS7 *p7;
|
---|
| 440 | BIO *p7bio = NULL;
|
---|
| 441 | int i;
|
---|
| 442 | X509 *x509;
|
---|
| 443 | if ((p7 = PKCS7_new()) == NULL) {
|
---|
| 444 | PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
|
---|
| 445 | return NULL;
|
---|
| 446 | }
|
---|
| 447 |
|
---|
| 448 | if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
|
---|
| 449 | goto err;
|
---|
| 450 | if (!PKCS7_set_cipher(p7, cipher)) {
|
---|
| 451 | PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_SETTING_CIPHER);
|
---|
| 452 | goto err;
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | for (i = 0; i < sk_X509_num(certs); i++) {
|
---|
| 456 | x509 = sk_X509_value(certs, i);
|
---|
| 457 | if (!PKCS7_add_recipient(p7, x509)) {
|
---|
| 458 | PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_ADDING_RECIPIENT);
|
---|
| 459 | goto err;
|
---|
| 460 | }
|
---|
| 461 | }
|
---|
| 462 |
|
---|
| 463 | if (flags & PKCS7_STREAM)
|
---|
| 464 | return p7;
|
---|
| 465 |
|
---|
| 466 | if (PKCS7_final(p7, in, flags))
|
---|
| 467 | return p7;
|
---|
| 468 |
|
---|
| 469 | err:
|
---|
| 470 |
|
---|
| 471 | BIO_free_all(p7bio);
|
---|
| 472 | PKCS7_free(p7);
|
---|
| 473 | return NULL;
|
---|
| 474 |
|
---|
| 475 | }
|
---|
| 476 |
|
---|
| 477 | int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
|
---|
| 478 | {
|
---|
| 479 | BIO *tmpmem;
|
---|
| 480 | int ret = 0, i;
|
---|
| 481 | char *buf = NULL;
|
---|
| 482 |
|
---|
| 483 | if (!p7) {
|
---|
| 484 | PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_INVALID_NULL_POINTER);
|
---|
| 485 | return 0;
|
---|
| 486 | }
|
---|
| 487 |
|
---|
| 488 | if (!PKCS7_type_is_enveloped(p7)) {
|
---|
| 489 | PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_WRONG_CONTENT_TYPE);
|
---|
| 490 | return 0;
|
---|
| 491 | }
|
---|
| 492 |
|
---|
| 493 | if (cert && !X509_check_private_key(cert, pkey)) {
|
---|
| 494 | PKCS7err(PKCS7_F_PKCS7_DECRYPT,
|
---|
| 495 | PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
|
---|
| 496 | return 0;
|
---|
| 497 | }
|
---|
| 498 |
|
---|
| 499 | if ((tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert)) == NULL) {
|
---|
| 500 | PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
|
---|
| 501 | return 0;
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 | if (flags & PKCS7_TEXT) {
|
---|
| 505 | BIO *tmpbuf, *bread;
|
---|
| 506 | /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
|
---|
| 507 | if ((tmpbuf = BIO_new(BIO_f_buffer())) == NULL) {
|
---|
| 508 | PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
|
---|
| 509 | BIO_free_all(tmpmem);
|
---|
| 510 | return 0;
|
---|
| 511 | }
|
---|
| 512 | if ((bread = BIO_push(tmpbuf, tmpmem)) == NULL) {
|
---|
| 513 | PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
|
---|
| 514 | BIO_free_all(tmpbuf);
|
---|
| 515 | BIO_free_all(tmpmem);
|
---|
| 516 | return 0;
|
---|
| 517 | }
|
---|
| 518 | ret = SMIME_text(bread, data);
|
---|
| 519 | if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
|
---|
| 520 | if (!BIO_get_cipher_status(tmpmem))
|
---|
| 521 | ret = 0;
|
---|
| 522 | }
|
---|
| 523 | BIO_free_all(bread);
|
---|
| 524 | return ret;
|
---|
| 525 | }
|
---|
| 526 | if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
|
---|
| 527 | PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
|
---|
| 528 | goto err;
|
---|
| 529 | }
|
---|
| 530 | for (;;) {
|
---|
| 531 | i = BIO_read(tmpmem, buf, BUFFERSIZE);
|
---|
| 532 | if (i <= 0) {
|
---|
| 533 | ret = 1;
|
---|
| 534 | if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
|
---|
| 535 | if (!BIO_get_cipher_status(tmpmem))
|
---|
| 536 | ret = 0;
|
---|
| 537 | }
|
---|
| 538 |
|
---|
| 539 | break;
|
---|
| 540 | }
|
---|
| 541 | if (BIO_write(data, buf, i) != i) {
|
---|
| 542 | break;
|
---|
| 543 | }
|
---|
| 544 | }
|
---|
| 545 | err:
|
---|
| 546 | OPENSSL_free(buf);
|
---|
| 547 | BIO_free_all(tmpmem);
|
---|
| 548 | return ret;
|
---|
| 549 | }
|
---|