p5_pbe.c revision 238405 
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
67ASN1_SEQUENCE(PBEPARAM) = {
68	ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),
69	ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)
70} ASN1_SEQUENCE_END(PBEPARAM)
71
72IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)
73
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		{
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
122err:
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
132X509_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	}
149