1 /* p5_pbe.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 1999.
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 password based encryption structure */
66
67 ASN1_SEQUENCE(PBEPARAM) = {
68 ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),
69 ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)
70 } ASN1_SEQUENCE_END(PBEPARAM)
71
72 IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)
73
74
75 /* Set an algorithm identifier for a PKCS#5 PBE algorithm */
76
77 int PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter,
78 const unsigned char *salt, int saltlen)
79 {
80 PBEPARAM *pbe=NULL;
81 ASN1_STRING *pbe_str=NULL;
82 unsigned char *sstr;
83
84 pbe = PBEPARAM_new();
85 if (!pbe)
86 {
87 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR,ERR_R_MALLOC_FAILURE);
88 goto err;
89 }
90 if(iter <= 0)
91 iter = PKCS5_DEFAULT_ITER;
92 if (!ASN1_INTEGER_set(pbe->iter, iter))
93 {
94 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR,ERR_R_MALLOC_FAILURE);
95 goto err;
96 }
97 if (!saltlen)
98 saltlen = PKCS5_SALT_LEN;
99 if (!ASN1_STRING_set(pbe->salt, NULL, saltlen))
100 {
101 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR,ERR_R_MALLOC_FAILURE);
102 goto err;
103 }
104 sstr = ASN1_STRING_data(pbe->salt);
105 if (salt)
106 memcpy(sstr, salt, saltlen);
107 else if (RAND_pseudo_bytes(sstr, saltlen) < 0)
108 goto err;
109
110 if(!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str))
111 {
112 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR,ERR_R_MALLOC_FAILURE);
113 goto err;
114 }
115
116 PBEPARAM_free(pbe);
117 pbe = NULL;
118
119 if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str))
120 return 1;
121
122 err:
123 if (pbe != NULL)
124 PBEPARAM_free(pbe);
125 if (pbe_str != NULL)
126 ASN1_STRING_free(pbe_str);
127 return 0;
128 }
129
130 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */
131
132 X509_ALGOR *PKCS5_pbe_set(int alg, int iter,
133 const unsigned char *salt, int saltlen)
134 {
135 X509_ALGOR *ret;
136 ret = X509_ALGOR_new();
137 if (!ret)
138 {
139 ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);
140 return NULL;
141 }
142
143 if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen))
144 return ret;
145
146 X509_ALGOR_free(ret);
147 return NULL;
148 }