1 /* $OpenBSD: p5_pbe.c,v 1.23 2021/12/25 13:17:48 jsing Exp $ */
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 <stdlib.h>
61 #include <string.h>
62
63 #include <openssl/asn1t.h>
64 #include <openssl/err.h>
65 #include <openssl/x509.h>
66
67 /* PKCS#5 password based encryption structure */
68
69 static const ASN1_TEMPLATE PBEPARAM_seq_tt[] = {
70 {
71 .offset = offsetof(PBEPARAM, salt),
72 .field_name = "salt",
73 .item = &ASN1_OCTET_STRING_it,
74 },
75 {
76 .offset = offsetof(PBEPARAM, iter),
77 .field_name = "iter",
78 .item = &ASN1_INTEGER_it,
79 },
80 };
81
82 const ASN1_ITEM PBEPARAM_it = {
83 .itype = ASN1_ITYPE_SEQUENCE,
84 .utype = V_ASN1_SEQUENCE,
85 .templates = PBEPARAM_seq_tt,
86 .tcount = sizeof(PBEPARAM_seq_tt) / sizeof(ASN1_TEMPLATE),
87 .size = sizeof(PBEPARAM),
88 .sname = "PBEPARAM",
89 };
90
91
92 PBEPARAM *
d2i_PBEPARAM(PBEPARAM ** a,const unsigned char ** in,long len)93 d2i_PBEPARAM(PBEPARAM **a, const unsigned char **in, long len)
94 {
95 return (PBEPARAM *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
96 &PBEPARAM_it);
97 }
98
99 int
i2d_PBEPARAM(PBEPARAM * a,unsigned char ** out)100 i2d_PBEPARAM(PBEPARAM *a, unsigned char **out)
101 {
102 return ASN1_item_i2d((ASN1_VALUE *)a, out, &PBEPARAM_it);
103 }
104
105 PBEPARAM *
PBEPARAM_new(void)106 PBEPARAM_new(void)
107 {
108 return (PBEPARAM *)ASN1_item_new(&PBEPARAM_it);
109 }
110
111 void
PBEPARAM_free(PBEPARAM * a)112 PBEPARAM_free(PBEPARAM *a)
113 {
114 ASN1_item_free((ASN1_VALUE *)a, &PBEPARAM_it);
115 }
116
117
118 /* Set an algorithm identifier for a PKCS#5 PBE algorithm */
119
120 int
PKCS5_pbe_set0_algor(X509_ALGOR * algor,int alg,int iter,const unsigned char * salt,int saltlen)121 PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter,
122 const unsigned char *salt, int saltlen)
123 {
124 PBEPARAM *pbe = NULL;
125 ASN1_STRING *pbe_str = NULL;
126 unsigned char *sstr;
127
128 pbe = PBEPARAM_new();
129 if (!pbe) {
130 ASN1error(ERR_R_MALLOC_FAILURE);
131 goto err;
132 }
133 if (iter <= 0)
134 iter = PKCS5_DEFAULT_ITER;
135 if (!ASN1_INTEGER_set(pbe->iter, iter)) {
136 ASN1error(ERR_R_MALLOC_FAILURE);
137 goto err;
138 }
139 if (!saltlen)
140 saltlen = PKCS5_SALT_LEN;
141 if (!ASN1_STRING_set(pbe->salt, NULL, saltlen)) {
142 ASN1error(ERR_R_MALLOC_FAILURE);
143 goto err;
144 }
145 sstr = ASN1_STRING_data(pbe->salt);
146 if (salt)
147 memcpy(sstr, salt, saltlen);
148 else
149 arc4random_buf(sstr, saltlen);
150
151 if (!ASN1_item_pack(pbe, &PBEPARAM_it, &pbe_str)) {
152 ASN1error(ERR_R_MALLOC_FAILURE);
153 goto err;
154 }
155
156 PBEPARAM_free(pbe);
157 pbe = NULL;
158
159 if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str))
160 return 1;
161
162 err:
163 if (pbe != NULL)
164 PBEPARAM_free(pbe);
165 ASN1_STRING_free(pbe_str);
166 return 0;
167 }
168
169 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */
170
171 X509_ALGOR *
PKCS5_pbe_set(int alg,int iter,const unsigned char * salt,int saltlen)172 PKCS5_pbe_set(int alg, int iter, const unsigned char *salt, int saltlen)
173 {
174 X509_ALGOR *ret;
175 ret = X509_ALGOR_new();
176 if (!ret) {
177 ASN1error(ERR_R_MALLOC_FAILURE);
178 return NULL;
179 }
180
181 if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen))
182 return ret;
183
184 X509_ALGOR_free(ret);
185 return NULL;
186 }
187