p5_pbe.c revision 306195 
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
68ASN1_SEQUENCE(PBEPARAM) = {
69        ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),
70        ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)
71} ASN1_SEQUENCE_END(PBEPARAM)
72
73IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)
74
75/* Set an algorithm identifier for a PKCS#5 PBE algorithm */
76
77int 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        ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
87        goto err;
88    }
89    if (iter <= 0)
90        iter = PKCS5_DEFAULT_ITER;
91    if (!ASN1_INTEGER_set(pbe->iter, iter)) {
92        ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
93        goto err;
94    }
95    if (!saltlen)
96        saltlen = PKCS5_SALT_LEN;
97    if (!ASN1_STRING_set(pbe->salt, NULL, saltlen)) {
98        ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
99        goto err;
100    }
101    sstr = ASN1_STRING_data(pbe->salt);
102    if (salt)
103        memcpy(sstr, salt, saltlen);
104    else if (RAND_bytes(sstr, saltlen) <= 0)
105        goto err;
106
107    if (!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str)) {
108        ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
109        goto err;
110    }
111
112    PBEPARAM_free(pbe);
113    pbe = NULL;
114
115    if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str))
116        return 1;
117
118 err:
119    if (pbe != NULL)
120        PBEPARAM_free(pbe);
121    if (pbe_str != NULL)
122        ASN1_STRING_free(pbe_str);
123    return 0;
124}
125
126/* Return an algorithm identifier for a PKCS#5 PBE algorithm */
127
128X509_ALGOR *PKCS5_pbe_set(int alg, int iter,
129                          const unsigned char *salt, int saltlen)
130{
131    X509_ALGOR *ret;
132    ret = X509_ALGOR_new();
133    if (!ret) {
134        ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
135        return NULL;
136    }
137
138    if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen))
139        return ret;
140
141    X509_ALGOR_free(ret);
142    return NULL;
143}
144