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Diffstat (limited to 'src/lib/libcrypto/cms/cms_enc.c')
-rw-r--r--src/lib/libcrypto/cms/cms_enc.c266
1 files changed, 0 insertions, 266 deletions
diff --git a/src/lib/libcrypto/cms/cms_enc.c b/src/lib/libcrypto/cms/cms_enc.c
deleted file mode 100644
index ef6925dbd6..0000000000
--- a/src/lib/libcrypto/cms/cms_enc.c
+++ /dev/null
@@ -1,266 +0,0 @@
1/* $OpenBSD: cms_enc.c,v 1.25 2024/11/01 18:34:06 tb Exp $ */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 * project.
5 */
6/* ====================================================================
7 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 */
54
55#include <stdlib.h>
56#include <string.h>
57
58#include <openssl/asn1.h>
59#include <openssl/bio.h>
60#include <openssl/cms.h>
61#include <openssl/err.h>
62#include <openssl/evp.h>
63#include <openssl/objects.h>
64#include <openssl/x509.h>
65
66#include "cms_local.h"
67#include "evp_local.h"
68
69/* CMS EncryptedData Utilities */
70
71/* Return BIO based on EncryptedContentInfo and key */
72
73BIO *
74cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec)
75{
76 BIO *b;
77 EVP_CIPHER_CTX *ctx;
78 const EVP_CIPHER *ciph;
79 X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
80 unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
81 unsigned char *tkey = NULL;
82 size_t tkeylen = 0;
83
84 int ok = 0;
85
86 int enc, keep_key = 0;
87
88 enc = ec->cipher ? 1 : 0;
89
90 b = BIO_new(BIO_f_cipher());
91 if (b == NULL) {
92 CMSerror(ERR_R_MALLOC_FAILURE);
93 return NULL;
94 }
95
96 BIO_get_cipher_ctx(b, &ctx);
97
98 if (enc) {
99 ciph = ec->cipher;
100 /*
101 * If not keeping key set cipher to NULL so subsequent calls decrypt.
102 */
103 if (ec->key)
104 ec->cipher = NULL;
105 } else {
106 ciph = EVP_get_cipherbyobj(calg->algorithm);
107
108 if (!ciph) {
109 CMSerror(CMS_R_UNKNOWN_CIPHER);
110 goto err;
111 }
112 }
113
114 if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, enc) <= 0) {
115 CMSerror(CMS_R_CIPHER_INITIALISATION_ERROR);
116 goto err;
117 }
118
119 if (enc) {
120 int ivlen;
121 calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
122 /* Generate a random IV if we need one */
123 ivlen = EVP_CIPHER_CTX_iv_length(ctx);
124 if (ivlen > 0) {
125 arc4random_buf(iv, ivlen);
126 piv = iv;
127 }
128 } else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0) {
129 CMSerror(CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
130 goto err;
131 }
132 tkeylen = EVP_CIPHER_CTX_key_length(ctx);
133 /* Generate random session key */
134 if (!enc || !ec->key) {
135 tkey = malloc(tkeylen);
136 if (tkey == NULL) {
137 CMSerror(ERR_R_MALLOC_FAILURE);
138 goto err;
139 }
140 if (EVP_CIPHER_CTX_rand_key(ctx, tkey) <= 0)
141 goto err;
142 }
143
144 if (!ec->key) {
145 ec->key = tkey;
146 ec->keylen = tkeylen;
147 tkey = NULL;
148 if (enc)
149 keep_key = 1;
150 else
151 ERR_clear_error();
152
153 }
154
155 if (ec->keylen != tkeylen) {
156 /* If necessary set key length */
157 if (!EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen)) {
158 /*
159 * Only reveal failure if debugging so we don't leak information
160 * which may be useful in MMA.
161 */
162 if (enc || ec->debug) {
163 CMSerror(CMS_R_INVALID_KEY_LENGTH);
164 goto err;
165 } else {
166 /* Use random key */
167 freezero(ec->key, ec->keylen);
168 ec->key = tkey;
169 ec->keylen = tkeylen;
170 tkey = NULL;
171 ERR_clear_error();
172 }
173 }
174 }
175
176 if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0) {
177 CMSerror(CMS_R_CIPHER_INITIALISATION_ERROR);
178 goto err;
179 }
180 if (enc) {
181 calg->parameter = ASN1_TYPE_new();
182 if (calg->parameter == NULL) {
183 CMSerror(ERR_R_MALLOC_FAILURE);
184 goto err;
185 }
186 if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0) {
187 CMSerror(CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
188 goto err;
189 }
190 /* If parameter type not set omit parameter */
191 if (calg->parameter->type == V_ASN1_UNDEF) {
192 ASN1_TYPE_free(calg->parameter);
193 calg->parameter = NULL;
194 }
195 }
196 ok = 1;
197
198 err:
199 if (!keep_key || !ok) {
200 freezero(ec->key, ec->keylen);
201 ec->key = NULL;
202 }
203 freezero(tkey, tkeylen);
204 if (ok)
205 return b;
206 BIO_free(b);
207 return NULL;
208}
209
210int
211cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
212 const EVP_CIPHER *cipher, const unsigned char *key, size_t keylen)
213{
214 ec->cipher = cipher;
215 if (key) {
216 if ((ec->key = malloc(keylen)) == NULL) {
217 CMSerror(ERR_R_MALLOC_FAILURE);
218 return 0;
219 }
220 memcpy(ec->key, key, keylen);
221 }
222 ec->keylen = keylen;
223 if (cipher)
224 ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
225
226 return 1;
227}
228
229int
230CMS_EncryptedData_set1_key(CMS_ContentInfo *cms, const EVP_CIPHER *ciph,
231 const unsigned char *key, size_t keylen)
232{
233 CMS_EncryptedContentInfo *ec;
234
235 if (!key || !keylen) {
236 CMSerror(CMS_R_NO_KEY);
237 return 0;
238 }
239 if (ciph) {
240 cms->d.encryptedData = (CMS_EncryptedData *)ASN1_item_new(&CMS_EncryptedData_it);
241 if (!cms->d.encryptedData) {
242 CMSerror(ERR_R_MALLOC_FAILURE);
243 return 0;
244 }
245 cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
246 cms->d.encryptedData->version = 0;
247 } else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted) {
248 CMSerror(CMS_R_NOT_ENCRYPTED_DATA);
249 return 0;
250 }
251 ec = cms->d.encryptedData->encryptedContentInfo;
252
253 return cms_EncryptedContent_init(ec, ciph, key, keylen);
254}
255LCRYPTO_ALIAS(CMS_EncryptedData_set1_key);
256
257BIO *
258cms_EncryptedData_init_bio(CMS_ContentInfo *cms)
259{
260 CMS_EncryptedData *enc = cms->d.encryptedData;
261
262 if (enc->encryptedContentInfo->cipher && enc->unprotectedAttrs)
263 enc->version = 2;
264
265 return cms_EncryptedContent_init_bio(enc->encryptedContentInfo);
266}
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