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diff --git a/src/lib/libcrypto/asn1/p5_pbev2.c b/src/lib/libcrypto/asn1/p5_pbev2.c
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1/* p5_pbev2.c */
2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 1999-2004.
4 */
5/* ====================================================================
6 * Copyright (c) 1999 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 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/asn1t.h>
62#include <openssl/x509.h>
63#include <openssl/rand.h>
64
65/* PKCS#5 v2.0 password based encryption structures */
66
67ASN1_SEQUENCE(PBE2PARAM) = {
68 ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
69 ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
70} ASN1_SEQUENCE_END(PBE2PARAM)
71
72IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM)
73
74ASN1_SEQUENCE(PBKDF2PARAM) = {
75 ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
76 ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
77 ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
78 ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
79} ASN1_SEQUENCE_END(PBKDF2PARAM)
80
81IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
82
83/* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm:
84 * yes I know this is horrible!
85 */
86
87X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
88 unsigned char *salt, int saltlen)
89{
90 X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
91 int alg_nid;
92 EVP_CIPHER_CTX ctx;
93 unsigned char iv[EVP_MAX_IV_LENGTH];
94 PBKDF2PARAM *kdf = NULL;
95 PBE2PARAM *pbe2 = NULL;
96 ASN1_OCTET_STRING *osalt = NULL;
97 ASN1_OBJECT *obj;
98
99 alg_nid = EVP_CIPHER_type(cipher);
100 if(alg_nid == NID_undef) {
101 ASN1err(ASN1_F_PKCS5_PBE2_SET,
102 ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
103 goto err;
104 }
105 obj = OBJ_nid2obj(alg_nid);
106
107 if(!(pbe2 = PBE2PARAM_new())) goto merr;
108
109 /* Setup the AlgorithmIdentifier for the encryption scheme */
110 scheme = pbe2->encryption;
111
112 scheme->algorithm = obj;
113 if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;
114
115 /* Create random IV */
116 if (EVP_CIPHER_iv_length(cipher) &&
117 RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0)
118 goto err;
119
120 EVP_CIPHER_CTX_init(&ctx);
121
122 /* Dummy cipherinit to just setup the IV */
123 EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0);
124 if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
125 ASN1err(ASN1_F_PKCS5_PBE2_SET,
126 ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
127 EVP_CIPHER_CTX_cleanup(&ctx);
128 goto err;
129 }
130 EVP_CIPHER_CTX_cleanup(&ctx);
131
132 if(!(kdf = PBKDF2PARAM_new())) goto merr;
133 if(!(osalt = M_ASN1_OCTET_STRING_new())) goto merr;
134
135 if (!saltlen) saltlen = PKCS5_SALT_LEN;
136 if (!(osalt->data = OPENSSL_malloc (saltlen))) goto merr;
137 osalt->length = saltlen;
138 if (salt) memcpy (osalt->data, salt, saltlen);
139 else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0) goto merr;
140
141 if(iter <= 0) iter = PKCS5_DEFAULT_ITER;
142 if(!ASN1_INTEGER_set(kdf->iter, iter)) goto merr;
143
144 /* Now include salt in kdf structure */
145 kdf->salt->value.octet_string = osalt;
146 kdf->salt->type = V_ASN1_OCTET_STRING;
147 osalt = NULL;
148
149 /* If its RC2 then we'd better setup the key length */
150
151 if(alg_nid == NID_rc2_cbc) {
152 if(!(kdf->keylength = M_ASN1_INTEGER_new())) goto merr;
153 if(!ASN1_INTEGER_set (kdf->keylength,
154 EVP_CIPHER_key_length(cipher))) goto merr;
155 }
156
157 /* prf can stay NULL because we are using hmacWithSHA1 */
158
159 /* Now setup the PBE2PARAM keyfunc structure */
160
161 pbe2->keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
162
163 /* Encode PBKDF2PARAM into parameter of pbe2 */
164
165 if(!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) goto merr;
166
167 if(!ASN1_pack_string(kdf, i2d_PBKDF2PARAM,
168 &pbe2->keyfunc->parameter->value.sequence)) goto merr;
169 pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE;
170
171 PBKDF2PARAM_free(kdf);
172 kdf = NULL;
173
174 /* Now set up top level AlgorithmIdentifier */
175
176 if(!(ret = X509_ALGOR_new())) goto merr;
177 if(!(ret->parameter = ASN1_TYPE_new())) goto merr;
178
179 ret->algorithm = OBJ_nid2obj(NID_pbes2);
180
181 /* Encode PBE2PARAM into parameter */
182
183 if(!ASN1_pack_string(pbe2, i2d_PBE2PARAM,
184 &ret->parameter->value.sequence)) goto merr;
185 ret->parameter->type = V_ASN1_SEQUENCE;
186
187 PBE2PARAM_free(pbe2);
188 pbe2 = NULL;
189
190 return ret;
191
192 merr:
193 ASN1err(ASN1_F_PKCS5_PBE2_SET,ERR_R_MALLOC_FAILURE);
194
195 err:
196 PBE2PARAM_free(pbe2);
197 /* Note 'scheme' is freed as part of pbe2 */
198 M_ASN1_OCTET_STRING_free(osalt);
199 PBKDF2PARAM_free(kdf);
200 X509_ALGOR_free(kalg);
201 X509_ALGOR_free(ret);
202
203 return NULL;
204
205}