p5_pbe.c revision 296465 
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/* Return an algorithm identifier for a PKCS#5 PBE algorithm */
76
77X509_ALGOR *PKCS5_pbe_set(int alg, int iter, unsigned char *salt, int saltlen)
78{
79    PBEPARAM *pbe = NULL;
80    ASN1_OBJECT *al;
81    X509_ALGOR *algor;
82    ASN1_TYPE *astype = NULL;
83
84    if (!(pbe = PBEPARAM_new())) {
85        ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
86        goto err;
87    }
88    if (iter <= 0)
89        iter = PKCS5_DEFAULT_ITER;
90    if (!ASN1_INTEGER_set(pbe->iter, iter)) {
91        ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
92        goto err;
93    }
94    if (!saltlen)
95        saltlen = PKCS5_SALT_LEN;
96    if (!(pbe->salt->data = OPENSSL_malloc(saltlen))) {
97        ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
98        goto err;
99    }
100    pbe->salt->length = saltlen;
101    if (salt)
102        memcpy(pbe->salt->data, salt, saltlen);
103    else if (RAND_pseudo_bytes(pbe->salt->data, saltlen) < 0)
104        goto err;
105
106    if (!(astype = ASN1_TYPE_new())) {
107        ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
108        goto err;
109    }
110
111    astype->type = V_ASN1_SEQUENCE;
112    if (!ASN1_pack_string_of(PBEPARAM, pbe, i2d_PBEPARAM,
113                             &astype->value.sequence)) {
114        ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
115        goto err;
116    }
117    PBEPARAM_free(pbe);
118    pbe = NULL;
119
120    al = OBJ_nid2obj(alg);      /* never need to free al */
121    if (!(algor = X509_ALGOR_new())) {
122        ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
123        goto err;
124    }
125    ASN1_OBJECT_free(algor->algorithm);
126    algor->algorithm = al;
127    algor->parameter = astype;
128
129    return (algor);
130 err:
131    if (pbe != NULL)
132        PBEPARAM_free(pbe);
133    if (astype != NULL)
134        ASN1_TYPE_free(astype);
135    return NULL;
136}
137