Line data Source code
1 : /* p5_pbe.c */
2 : /*
3 : * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 : * 1999.
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
14 : * notice, this list of conditions and the following disclaimer.
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"
62 : #include <openssl/asn1t.h>
63 : #include <openssl/x509.h>
64 : #include <openssl/rand.h>
65 :
66 : /* PKCS#5 password based encryption structure */
67 :
68 : ASN1_SEQUENCE(PBEPARAM) = {
69 : ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),
70 : ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)
71 : } ASN1_SEQUENCE_END(PBEPARAM)
72 :
73 0 : IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)
74 :
75 : /* Set an algorithm identifier for a PKCS#5 PBE algorithm */
76 :
77 0 : 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 0 : ASN1_STRING *pbe_str = NULL;
82 : unsigned char *sstr;
83 :
84 : pbe = PBEPARAM_new();
85 0 : if (!pbe) {
86 0 : ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
87 0 : goto err;
88 : }
89 0 : if (iter <= 0)
90 : iter = PKCS5_DEFAULT_ITER;
91 0 : if (!ASN1_INTEGER_set(pbe->iter, iter)) {
92 0 : ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
93 0 : goto err;
94 : }
95 0 : if (!saltlen)
96 : saltlen = PKCS5_SALT_LEN;
97 0 : if (!ASN1_STRING_set(pbe->salt, NULL, saltlen)) {
98 0 : ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
99 0 : goto err;
100 : }
101 0 : sstr = ASN1_STRING_data(pbe->salt);
102 0 : if (salt)
103 0 : memcpy(sstr, salt, saltlen);
104 0 : else if (RAND_pseudo_bytes(sstr, saltlen) < 0)
105 : goto err;
106 :
107 0 : if (!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str)) {
108 0 : ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
109 0 : goto err;
110 : }
111 :
112 : PBEPARAM_free(pbe);
113 : pbe = NULL;
114 :
115 0 : if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str))
116 : return 1;
117 :
118 : err:
119 0 : if (pbe != NULL)
120 : PBEPARAM_free(pbe);
121 0 : if (pbe_str != NULL)
122 0 : ASN1_STRING_free(pbe_str);
123 : return 0;
124 : }
125 :
126 : /* Return an algorithm identifier for a PKCS#5 PBE algorithm */
127 :
128 0 : X509_ALGOR *PKCS5_pbe_set(int alg, int iter,
129 : const unsigned char *salt, int saltlen)
130 : {
131 : X509_ALGOR *ret;
132 0 : ret = X509_ALGOR_new();
133 0 : if (!ret) {
134 0 : ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
135 0 : return NULL;
136 : }
137 :
138 0 : if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen))
139 : return ret;
140 :
141 0 : X509_ALGOR_free(ret);
142 0 : return NULL;
143 : }
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