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 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */
75 
76 X509_ALGOR *PKCS5_pbe_set(int alg, int iter, unsigned char *salt,
77 	     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) iter = PKCS5_DEFAULT_ITER;
89 	if (!ASN1_INTEGER_set(pbe->iter, iter)) {
90 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);
91 		goto err;
92 	}
93 	if (!saltlen) saltlen = PKCS5_SALT_LEN;
94 	if (!(pbe->salt->data = OPENSSL_malloc (saltlen))) {
95 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);
96 		goto err;
97 	}
98 	pbe->salt->length = saltlen;
99 	if (salt) memcpy (pbe->salt->data, salt, saltlen);
100 	else if (RAND_pseudo_bytes (pbe->salt->data, saltlen) < 0)
101 		goto err;
102 
103 	if (!(astype = ASN1_TYPE_new())) {
104 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);
105 		goto err;
106 	}
107 
108 	astype->type = V_ASN1_SEQUENCE;
109 	if(!ASN1_pack_string_of(PBEPARAM, pbe, i2d_PBEPARAM,
110 				&astype->value.sequence)) {
111 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);
112 		goto err;
113 	}
114 	PBEPARAM_free (pbe);
115 	pbe = NULL;
116 
117 	al = OBJ_nid2obj(alg); /* never need to free al */
118 	if (!(algor = X509_ALGOR_new())) {
119 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);
120 		goto err;
121 	}
122 	ASN1_OBJECT_free(algor->algorithm);
123 	algor->algorithm = al;
124 	algor->parameter = astype;
125 
126 	return (algor);
127 err:
128 	if (pbe != NULL) PBEPARAM_free(pbe);
129 	if (astype != NULL) ASN1_TYPE_free(astype);
130 	return NULL;
131 }
132