p5_pbe.c revision 55714 
1/* p5_pbe.c */
2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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/asn1_mac.h>
62#include <openssl/x509.h>
63#include <openssl/rand.h>
64
65/* PKCS#5 password based encryption structure */
66
67int i2d_PBEPARAM(PBEPARAM *a, unsigned char **pp)
68{
69	M_ASN1_I2D_vars(a);
70	M_ASN1_I2D_len (a->salt, i2d_ASN1_OCTET_STRING);
71	M_ASN1_I2D_len (a->iter, i2d_ASN1_INTEGER);
72
73	M_ASN1_I2D_seq_total ();
74
75	M_ASN1_I2D_put (a->salt, i2d_ASN1_OCTET_STRING);
76	M_ASN1_I2D_put (a->iter, i2d_ASN1_INTEGER);
77	M_ASN1_I2D_finish();
78}
79
80PBEPARAM *PBEPARAM_new(void)
81{
82	PBEPARAM *ret=NULL;
83	ASN1_CTX c;
84	M_ASN1_New_Malloc(ret, PBEPARAM);
85	M_ASN1_New(ret->iter,ASN1_INTEGER_new);
86	M_ASN1_New(ret->salt,ASN1_OCTET_STRING_new);
87	return (ret);
88	M_ASN1_New_Error(ASN1_F_PBEPARAM_NEW);
89}
90
91PBEPARAM *d2i_PBEPARAM(PBEPARAM **a, unsigned char **pp, long length)
92{
93	M_ASN1_D2I_vars(a,PBEPARAM *,PBEPARAM_new);
94	M_ASN1_D2I_Init();
95	M_ASN1_D2I_start_sequence();
96	M_ASN1_D2I_get (ret->salt, d2i_ASN1_OCTET_STRING);
97	M_ASN1_D2I_get (ret->iter, d2i_ASN1_INTEGER);
98	M_ASN1_D2I_Finish(a, PBEPARAM_free, ASN1_F_D2I_PBEPARAM);
99}
100
101void PBEPARAM_free (PBEPARAM *a)
102{
103	if(a==NULL) return;
104	ASN1_OCTET_STRING_free(a->salt);
105	ASN1_INTEGER_free (a->iter);
106	Free ((char *)a);
107}
108
109/* Return an algorithm identifier for a PKCS#5 PBE algorithm */
110
111X509_ALGOR *PKCS5_pbe_set(int alg, int iter, unsigned char *salt,
112	     int saltlen)
113{
114	PBEPARAM *pbe;
115	ASN1_OBJECT *al;
116	X509_ALGOR *algor;
117	ASN1_TYPE *astype;
118
119	if (!(pbe = PBEPARAM_new ())) {
120		ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
121		return NULL;
122	}
123	if(iter <= 0) iter = PKCS5_DEFAULT_ITER;
124	ASN1_INTEGER_set (pbe->iter, iter);
125	if (!saltlen) saltlen = PKCS5_SALT_LEN;
126	if (!(pbe->salt->data = Malloc (saltlen))) {
127		ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
128		return NULL;
129	}
130	pbe->salt->length = saltlen;
131	if (salt) memcpy (pbe->salt->data, salt, saltlen);
132	else RAND_bytes (pbe->salt->data, saltlen);
133
134	if (!(astype = ASN1_TYPE_new())) {
135		ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
136		return NULL;
137	}
138
139	astype->type = V_ASN1_SEQUENCE;
140	if(!ASN1_pack_string(pbe, i2d_PBEPARAM, &astype->value.sequence)) {
141		ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
142		return NULL;
143	}
144	PBEPARAM_free (pbe);
145
146	al = OBJ_nid2obj(alg); /* never need to free al */
147	if (!(algor = X509_ALGOR_new())) {
148		ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
149		return NULL;
150	}
151	ASN1_OBJECT_free(algor->algorithm);
152	algor->algorithm = al;
153	algor->parameter = astype;
154
155	return (algor);
156}
157