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Diffstat (limited to 'src/lib/libcrypto/cms/cms_enc.c')
-rw-r--r--src/lib/libcrypto/cms/cms_enc.c267
1 files changed, 0 insertions, 267 deletions
diff --git a/src/lib/libcrypto/cms/cms_enc.c b/src/lib/libcrypto/cms/cms_enc.c
deleted file mode 100644
index c967a18a3c..0000000000
--- a/src/lib/libcrypto/cms/cms_enc.c
+++ /dev/null
@@ -1,267 +0,0 @@
1/* $OpenBSD: cms_enc.c,v 1.7 2015/09/10 15:56:25 jsing Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5/* ====================================================================
6 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 */
53
54#include <stdlib.h>
55
56#include <openssl/asn1t.h>
57#include <openssl/cms.h>
58#include <openssl/err.h>
59#include <openssl/pem.h>
60#include <openssl/x509v3.h>
61
62#include "cms_lcl.h"
63
64/* CMS EncryptedData Utilities */
65
66DECLARE_ASN1_ITEM(CMS_EncryptedData)
67
68/* Return BIO based on EncryptedContentInfo and key */
69
70BIO *
71cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec)
72{
73 BIO *b;
74 EVP_CIPHER_CTX *ctx;
75 const EVP_CIPHER *ciph;
76 X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
77 unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
78 unsigned char *tkey = NULL;
79 size_t tkeylen = 0;
80 int ok = 0;
81 int enc, keep_key = 0;
82
83 enc = ec->cipher ? 1 : 0;
84
85 b = BIO_new(BIO_f_cipher());
86 if (!b) {
87 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
88 ERR_R_MALLOC_FAILURE);
89 return NULL;
90 }
91
92 BIO_get_cipher_ctx(b, &ctx);
93
94 if (enc) {
95 ciph = ec->cipher;
96 /* If not keeping key set cipher to NULL so subsequent calls
97 * decrypt.
98 */
99 if (ec->key)
100 ec->cipher = NULL;
101 } else {
102 ciph = EVP_get_cipherbyobj(calg->algorithm);
103
104 if (!ciph) {
105 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
106 CMS_R_UNKNOWN_CIPHER);
107 goto err;
108 }
109 }
110
111 if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, enc) <= 0) {
112 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
113 CMS_R_CIPHER_INITIALISATION_ERROR);
114 goto err;
115 }
116
117 if (enc) {
118 int ivlen;
119 calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
120 /* Generate a random IV if we need one */
121 ivlen = EVP_CIPHER_CTX_iv_length(ctx);
122 if (ivlen > 0) {
123 arc4random_buf(iv, ivlen);
124 piv = iv;
125 }
126 } else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0) {
127 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
128 CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
129 goto err;
130 }
131 tkeylen = EVP_CIPHER_CTX_key_length(ctx);
132 /* Generate random session key */
133 if (!enc || !ec->key) {
134 tkey = malloc(tkeylen);
135 if (!tkey) {
136 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
137 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) <= 0) {
158 /* Only reveal failure if debugging so we don't
159 * leak information which may be useful in MMA.
160 */
161 if (enc || ec->debug) {
162 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
163 CMS_R_INVALID_KEY_LENGTH);
164 goto err;
165 } else {
166 /* Use random key */
167 explicit_bzero(ec->key, ec->keylen);
168 free(ec->key);
169 ec->key = tkey;
170 ec->keylen = tkeylen;
171 tkey = NULL;
172 ERR_clear_error();
173 }
174 }
175 }
176
177 if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0) {
178 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
179 CMS_R_CIPHER_INITIALISATION_ERROR);
180 goto err;
181 }
182
183 if (piv) {
184 calg->parameter = ASN1_TYPE_new();
185 if (!calg->parameter) {
186 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
187 ERR_R_MALLOC_FAILURE);
188 goto err;
189 }
190 if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0) {
191 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
192 CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
193 goto err;
194 }
195 }
196 ok = 1;
197
198err:
199 if (ec->key && !keep_key) {
200 explicit_bzero(ec->key, ec->keylen);
201 free(ec->key);
202 ec->key = NULL;
203 }
204 if (tkey) {
205 explicit_bzero(tkey, tkeylen);
206 free(tkey);
207 }
208 if (ok)
209 return b;
210 BIO_free(b);
211 return NULL;
212}
213
214int
215cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
216 const EVP_CIPHER *cipher, const unsigned char *key, size_t keylen)
217{
218 ec->cipher = cipher;
219 if (key) {
220 ec->key = malloc(keylen);
221 if (!ec->key)
222 return 0;
223 memcpy(ec->key, key, keylen);
224 }
225 ec->keylen = keylen;
226 if (cipher)
227 ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
228 return 1;
229}
230
231int
232CMS_EncryptedData_set1_key(CMS_ContentInfo *cms, const EVP_CIPHER *ciph,
233 const unsigned char *key, size_t keylen)
234{
235 CMS_EncryptedContentInfo *ec;
236
237 if (!key || !keylen) {
238 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NO_KEY);
239 return 0;
240 }
241 if (ciph) {
242 cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
243 if (!cms->d.encryptedData) {
244 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
245 ERR_R_MALLOC_FAILURE);
246 return 0;
247 }
248 cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
249 cms->d.encryptedData->version = 0;
250 } else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted) {
251 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
252 CMS_R_NOT_ENCRYPTED_DATA);
253 return 0;
254 }
255 ec = cms->d.encryptedData->encryptedContentInfo;
256 return cms_EncryptedContent_init(ec, ciph, key, keylen);
257}
258
259BIO *
260cms_EncryptedData_init_bio(CMS_ContentInfo *cms)
261{
262 CMS_EncryptedData *enc = cms->d.encryptedData;
263
264 if (enc->encryptedContentInfo->cipher && enc->unprotectedAttrs)
265 enc->version = 2;
266 return cms_EncryptedContent_init_bio(enc->encryptedContentInfo);
267}
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