]> git.ipfire.org Git - thirdparty/openssl.git/blame - crypto/asn1/p5_pbev2.c
New ASN1_TYPE SEQUENCE functions.
[thirdparty/openssl.git] / crypto / asn1 / p5_pbev2.c
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d2e26dcc 1/* p5_pbev2.c */
0f113f3e
MC
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 1999-2004.
d2e26dcc
DSH
5 */
6/* ====================================================================
7 * Copyright (c) 1999 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
0f113f3e 14 * notice, this list of conditions and the following disclaimer.
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DSH
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 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <stdio.h>
61#include "cryptlib.h"
9d6b1ce6 62#include <openssl/asn1t.h>
f0e8ae72 63#include <openssl/x509.h>
ec577822 64#include <openssl/rand.h>
d2e26dcc
DSH
65
66/* PKCS#5 v2.0 password based encryption structures */
67
9d6b1ce6 68ASN1_SEQUENCE(PBE2PARAM) = {
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MC
69 ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
70 ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
d339187b 71} ASN1_SEQUENCE_END(PBE2PARAM)
d2e26dcc 72
9d6b1ce6 73IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM)
d2e26dcc 74
9d6b1ce6 75ASN1_SEQUENCE(PBKDF2PARAM) = {
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MC
76 ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
77 ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
78 ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
79 ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
d339187b 80} ASN1_SEQUENCE_END(PBKDF2PARAM)
d2e26dcc 81
9d6b1ce6 82IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
d2e26dcc 83
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84/*
85 * Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm: yes I know
86 * this is horrible! Extended version to allow application supplied PRF NID
87 * and IV.
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DSH
88 */
89
ae519a24 90X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
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MC
91 unsigned char *salt, int saltlen,
92 unsigned char *aiv, int prf_nid)
8e21c146 93{
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MC
94 X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
95 int alg_nid, keylen;
96 EVP_CIPHER_CTX ctx;
97 unsigned char iv[EVP_MAX_IV_LENGTH];
98 PBE2PARAM *pbe2 = NULL;
99 ASN1_OBJECT *obj;
100
101 alg_nid = EVP_CIPHER_type(cipher);
102 if (alg_nid == NID_undef) {
103 ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,
104 ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
105 goto err;
106 }
107 obj = OBJ_nid2obj(alg_nid);
108
109 if (!(pbe2 = PBE2PARAM_new()))
110 goto merr;
111
112 /* Setup the AlgorithmIdentifier for the encryption scheme */
113 scheme = pbe2->encryption;
114
115 scheme->algorithm = obj;
116 if (!(scheme->parameter = ASN1_TYPE_new()))
117 goto merr;
118
119 /* Create random IV */
120 if (EVP_CIPHER_iv_length(cipher)) {
121 if (aiv)
122 memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher));
266483d2 123 else if (RAND_bytes(iv, EVP_CIPHER_iv_length(cipher)) <= 0)
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MC
124 goto err;
125 }
126
127 EVP_CIPHER_CTX_init(&ctx);
128
129 /* Dummy cipherinit to just setup the IV, and PRF */
130 if (!EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0))
131 goto err;
132 if (EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
133 ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
134 EVP_CIPHER_CTX_cleanup(&ctx);
135 goto err;
136 }
137 /*
138 * If prf NID unspecified see if cipher has a preference. An error is OK
139 * here: just means use default PRF.
140 */
141 if ((prf_nid == -1) &&
142 EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0) {
143 ERR_clear_error();
144 prf_nid = NID_hmacWithSHA1;
145 }
146 EVP_CIPHER_CTX_cleanup(&ctx);
147
148 /* If its RC2 then we'd better setup the key length */
149
150 if (alg_nid == NID_rc2_cbc)
151 keylen = EVP_CIPHER_key_length(cipher);
152 else
153 keylen = -1;
154
155 /* Setup keyfunc */
156
157 X509_ALGOR_free(pbe2->keyfunc);
158
159 pbe2->keyfunc = PKCS5_pbkdf2_set(iter, salt, saltlen, prf_nid, keylen);
160
161 if (!pbe2->keyfunc)
162 goto merr;
163
164 /* Now set up top level AlgorithmIdentifier */
165
166 if (!(ret = X509_ALGOR_new()))
167 goto merr;
168 if (!(ret->parameter = ASN1_TYPE_new()))
169 goto merr;
170
171 ret->algorithm = OBJ_nid2obj(NID_pbes2);
172
173 /* Encode PBE2PARAM into parameter */
174
175 if (!ASN1_item_pack(pbe2, ASN1_ITEM_rptr(PBE2PARAM),
176 &ret->parameter->value.sequence))
177 goto merr;
178 ret->parameter->type = V_ASN1_SEQUENCE;
179
180 PBE2PARAM_free(pbe2);
181 pbe2 = NULL;
182
183 return ret;
184
185 merr:
186 ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, ERR_R_MALLOC_FAILURE);
187
188 err:
189 PBE2PARAM_free(pbe2);
190 /* Note 'scheme' is freed as part of pbe2 */
191 X509_ALGOR_free(kalg);
192 X509_ALGOR_free(ret);
193
194 return NULL;
8e21c146 195
0f113f3e 196}
8e21c146 197
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198X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
199 unsigned char *salt, int saltlen)
200{
201 return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1);
202}
8e21c146 203
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MC
204X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen,
205 int prf_nid, int keylen)
206{
207 X509_ALGOR *keyfunc = NULL;
208 PBKDF2PARAM *kdf = NULL;
209 ASN1_OCTET_STRING *osalt = NULL;
0fccb00b 210
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MC
211 if (!(kdf = PBKDF2PARAM_new()))
212 goto merr;
f422a514 213 if (!(osalt = ASN1_OCTET_STRING_new()))
0f113f3e 214 goto merr;
8e21c146 215
0f113f3e
MC
216 kdf->salt->value.octet_string = osalt;
217 kdf->salt->type = V_ASN1_OCTET_STRING;
8e21c146 218
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MC
219 if (!saltlen)
220 saltlen = PKCS5_SALT_LEN;
221 if (!(osalt->data = OPENSSL_malloc(saltlen)))
222 goto merr;
8e21c146 223
0f113f3e 224 osalt->length = saltlen;
8e21c146 225
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MC
226 if (salt)
227 memcpy(osalt->data, salt, saltlen);
266483d2 228 else if (RAND_bytes(osalt->data, saltlen) <= 0)
0f113f3e 229 goto merr;
f9678b8b 230
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MC
231 if (iter <= 0)
232 iter = PKCS5_DEFAULT_ITER;
8e21c146 233
0f113f3e
MC
234 if (!ASN1_INTEGER_set(kdf->iter, iter))
235 goto merr;
8e21c146 236
0f113f3e 237 /* If have a key len set it up */
8e21c146 238
0f113f3e 239 if (keylen > 0) {
f422a514 240 if (!(kdf->keylength = ASN1_INTEGER_new()))
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MC
241 goto merr;
242 if (!ASN1_INTEGER_set(kdf->keylength, keylen))
243 goto merr;
244 }
8e21c146 245
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MC
246 /* prf can stay NULL if we are using hmacWithSHA1 */
247 if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1) {
248 kdf->prf = X509_ALGOR_new();
249 if (!kdf->prf)
250 goto merr;
251 X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid), V_ASN1_NULL, NULL);
252 }
8e21c146 253
0f113f3e 254 /* Finally setup the keyfunc structure */
8e21c146 255
0f113f3e
MC
256 keyfunc = X509_ALGOR_new();
257 if (!keyfunc)
258 goto merr;
8e21c146 259
0f113f3e 260 keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
8e21c146 261
0f113f3e 262 /* Encode PBKDF2PARAM into parameter of pbe2 */
8e21c146 263
0f113f3e
MC
264 if (!(keyfunc->parameter = ASN1_TYPE_new()))
265 goto merr;
8e21c146 266
0f113f3e
MC
267 if (!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM),
268 &keyfunc->parameter->value.sequence))
269 goto merr;
270 keyfunc->parameter->type = V_ASN1_SEQUENCE;
8e21c146 271
0f113f3e
MC
272 PBKDF2PARAM_free(kdf);
273 return keyfunc;
8e21c146 274
0f113f3e
MC
275 merr:
276 ASN1err(ASN1_F_PKCS5_PBKDF2_SET, ERR_R_MALLOC_FAILURE);
277 PBKDF2PARAM_free(kdf);
278 X509_ALGOR_free(keyfunc);
279 return NULL;
8e21c146 280}