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Diffstat (limited to 'src/lib/libcrypto/cms/cms_enc.c')
-rw-r--r--src/lib/libcrypto/cms/cms_enc.c262
1 files changed, 0 insertions, 262 deletions
diff --git a/src/lib/libcrypto/cms/cms_enc.c b/src/lib/libcrypto/cms/cms_enc.c
deleted file mode 100644
index bab26235bd..0000000000
--- a/src/lib/libcrypto/cms/cms_enc.c
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1/* crypto/cms/cms_enc.c */
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 "cryptlib.h"
55#include <openssl/asn1t.h>
56#include <openssl/pem.h>
57#include <openssl/x509v3.h>
58#include <openssl/err.h>
59#include <openssl/cms.h>
60#include <openssl/rand.h>
61#include "cms_lcl.h"
62
63/* CMS EncryptedData Utilities */
64
65DECLARE_ASN1_ITEM(CMS_EncryptedData)
66
67/* Return BIO based on EncryptedContentInfo and key */
68
69BIO *cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec)
70 {
71 BIO *b;
72 EVP_CIPHER_CTX *ctx;
73 const EVP_CIPHER *ciph;
74 X509_ALGOR *calg = ec->contentEncryptionAlgorithm;
75 unsigned char iv[EVP_MAX_IV_LENGTH], *piv = NULL;
76
77 int ok = 0;
78
79 int enc, keep_key = 0;
80
81 enc = ec->cipher ? 1 : 0;
82
83 b = BIO_new(BIO_f_cipher());
84 if (!b)
85 {
86 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
87 ERR_R_MALLOC_FAILURE);
88 return NULL;
89 }
90
91 BIO_get_cipher_ctx(b, &ctx);
92
93 if (enc)
94 {
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 }
102 else
103 {
104 ciph = EVP_get_cipherbyobj(calg->algorithm);
105
106 if (!ciph)
107 {
108 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
109 CMS_R_UNKNOWN_CIPHER);
110 goto err;
111 }
112 }
113
114 if (EVP_CipherInit_ex(ctx, ciph, NULL, NULL, NULL, enc) <= 0)
115 {
116 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
117 CMS_R_CIPHER_INITIALISATION_ERROR);
118 goto err;
119 }
120
121 if (enc)
122 {
123 int ivlen;
124 calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
125 /* Generate a random IV if we need one */
126 ivlen = EVP_CIPHER_CTX_iv_length(ctx);
127 if (ivlen > 0)
128 {
129 if (RAND_pseudo_bytes(iv, ivlen) <= 0)
130 goto err;
131 piv = iv;
132 }
133 }
134 else if (EVP_CIPHER_asn1_to_param(ctx, calg->parameter) <= 0)
135 {
136 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
137 CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
138 goto err;
139 }
140
141
142 if (enc && !ec->key)
143 {
144 /* Generate random key */
145 if (!ec->keylen)
146 ec->keylen = EVP_CIPHER_CTX_key_length(ctx);
147 ec->key = OPENSSL_malloc(ec->keylen);
148 if (!ec->key)
149 {
150 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
151 ERR_R_MALLOC_FAILURE);
152 goto err;
153 }
154 if (EVP_CIPHER_CTX_rand_key(ctx, ec->key) <= 0)
155 goto err;
156 keep_key = 1;
157 }
158 else if (ec->keylen != (unsigned int)EVP_CIPHER_CTX_key_length(ctx))
159 {
160 /* If necessary set key length */
161 if (EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen) <= 0)
162 {
163 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
164 CMS_R_INVALID_KEY_LENGTH);
165 goto err;
166 }
167 }
168
169 if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0)
170 {
171 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
172 CMS_R_CIPHER_INITIALISATION_ERROR);
173 goto err;
174 }
175
176 if (piv)
177 {
178 calg->parameter = ASN1_TYPE_new();
179 if (!calg->parameter)
180 {
181 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
182 ERR_R_MALLOC_FAILURE);
183 goto err;
184 }
185 if (EVP_CIPHER_param_to_asn1(ctx, calg->parameter) <= 0)
186 {
187 CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
188 CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
189 goto err;
190 }
191 }
192 ok = 1;
193
194 err:
195 if (ec->key && !keep_key)
196 {
197 OPENSSL_cleanse(ec->key, ec->keylen);
198 OPENSSL_free(ec->key);
199 ec->key = NULL;
200 }
201 if (ok)
202 return b;
203 BIO_free(b);
204 return NULL;
205 }
206
207int cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
208 const EVP_CIPHER *cipher,
209 const unsigned char *key, size_t keylen)
210 {
211 ec->cipher = cipher;
212 if (key)
213 {
214 ec->key = OPENSSL_malloc(keylen);
215 if (!ec->key)
216 return 0;
217 memcpy(ec->key, key, keylen);
218 }
219 ec->keylen = keylen;
220 if (cipher)
221 ec->contentType = OBJ_nid2obj(NID_pkcs7_data);
222 return 1;
223 }
224
225int CMS_EncryptedData_set1_key(CMS_ContentInfo *cms, const EVP_CIPHER *ciph,
226 const unsigned char *key, size_t keylen)
227 {
228 CMS_EncryptedContentInfo *ec;
229 if (!key || !keylen)
230 {
231 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY, CMS_R_NO_KEY);
232 return 0;
233 }
234 if (ciph)
235 {
236 cms->d.encryptedData = M_ASN1_new_of(CMS_EncryptedData);
237 if (!cms->d.encryptedData)
238 {
239 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
240 ERR_R_MALLOC_FAILURE);
241 return 0;
242 }
243 cms->contentType = OBJ_nid2obj(NID_pkcs7_encrypted);
244 cms->d.encryptedData->version = 0;
245 }
246 else if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_encrypted)
247 {
248 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_SET1_KEY,
249 CMS_R_NOT_ENCRYPTED_DATA);
250 return 0;
251 }
252 ec = cms->d.encryptedData->encryptedContentInfo;
253 return cms_EncryptedContent_init(ec, ciph, key, keylen);
254 }
255
256BIO *cms_EncryptedData_init_bio(CMS_ContentInfo *cms)
257 {
258 CMS_EncryptedData *enc = cms->d.encryptedData;
259 if (enc->encryptedContentInfo->cipher && enc->unprotectedAttrs)
260 enc->version = 2;
261 return cms_EncryptedContent_init_bio(enc->encryptedContentInfo);
262 }
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