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 
67 ASN1_SEQUENCE(PBEPARAM) = {
68 	ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),
69 	ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)
70 } ASN1_SEQUENCE_END(PBEPARAM)
71 
72 IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)
73 
74 
75 /* Set an algorithm identifier for a PKCS#5 PBE algorithm */
76 
77 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 	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 
122 err:
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 
132 X509_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