Line data Source code
1 : /* p5_crpt.c */
2 : /*
3 : * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 : * 1999.
5 : */
6 : /* ====================================================================
7 : * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 : *
9 : * Redistribution and use in source and binary forms, with or without
10 : * modification, are permitted provided that the following conditions
11 : * are met:
12 : *
13 : * 1. Redistributions of source code must retain the above copyright
14 : * notice, this list of conditions and the following disclaimer.
15 : *
16 : * 2. Redistributions in binary form must reproduce the above copyright
17 : * notice, this list of conditions and the following disclaimer in
18 : * the documentation and/or other materials provided with the
19 : * distribution.
20 : *
21 : * 3. All advertising materials mentioning features or use of this
22 : * software must display the following acknowledgment:
23 : * "This product includes software developed by the OpenSSL Project
24 : * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 : *
26 : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 : * endorse or promote products derived from this software without
28 : * prior written permission. For written permission, please contact
29 : * licensing@OpenSSL.org.
30 : *
31 : * 5. Products derived from this software may not be called "OpenSSL"
32 : * nor may "OpenSSL" appear in their names without prior written
33 : * permission of the OpenSSL Project.
34 : *
35 : * 6. Redistributions of any form whatsoever must retain the following
36 : * acknowledgment:
37 : * "This product includes software developed by the OpenSSL Project
38 : * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 : *
40 : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 : * OF THE POSSIBILITY OF SUCH DAMAGE.
52 : * ====================================================================
53 : *
54 : * This product includes cryptographic software written by Eric Young
55 : * (eay@cryptsoft.com). This product includes software written by Tim
56 : * Hudson (tjh@cryptsoft.com).
57 : *
58 : */
59 :
60 : #include <stdio.h>
61 : #include <stdlib.h>
62 : #include "cryptlib.h"
63 : #include <openssl/x509.h>
64 : #include <openssl/evp.h>
65 :
66 : /*
67 : * Doesn't do anything now: Builtin PBE algorithms in static table.
68 : */
69 :
70 0 : void PKCS5_PBE_add(void)
71 : {
72 0 : }
73 :
74 0 : int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
75 : ASN1_TYPE *param, const EVP_CIPHER *cipher,
76 : const EVP_MD *md, int en_de)
77 : {
78 : EVP_MD_CTX ctx;
79 : unsigned char md_tmp[EVP_MAX_MD_SIZE];
80 : unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
81 : int i;
82 : PBEPARAM *pbe;
83 : int saltlen, iter;
84 : unsigned char *salt;
85 : const unsigned char *pbuf;
86 : int mdsize;
87 : int rv = 0;
88 0 : EVP_MD_CTX_init(&ctx);
89 :
90 : /* Extract useful info from parameter */
91 0 : if (param == NULL || param->type != V_ASN1_SEQUENCE ||
92 0 : param->value.sequence == NULL) {
93 0 : EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
94 0 : return 0;
95 : }
96 :
97 0 : pbuf = param->value.sequence->data;
98 0 : if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {
99 0 : EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
100 0 : return 0;
101 : }
102 :
103 0 : if (!pbe->iter)
104 : iter = 1;
105 : else
106 0 : iter = ASN1_INTEGER_get(pbe->iter);
107 0 : salt = pbe->salt->data;
108 0 : saltlen = pbe->salt->length;
109 :
110 0 : if (!pass)
111 : passlen = 0;
112 0 : else if (passlen == -1)
113 0 : passlen = strlen(pass);
114 :
115 0 : if (!EVP_DigestInit_ex(&ctx, md, NULL))
116 : goto err;
117 0 : if (!EVP_DigestUpdate(&ctx, pass, passlen))
118 : goto err;
119 0 : if (!EVP_DigestUpdate(&ctx, salt, saltlen))
120 : goto err;
121 0 : PBEPARAM_free(pbe);
122 0 : if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL))
123 : goto err;
124 0 : mdsize = EVP_MD_size(md);
125 0 : if (mdsize < 0)
126 : return 0;
127 0 : for (i = 1; i < iter; i++) {
128 0 : if (!EVP_DigestInit_ex(&ctx, md, NULL))
129 : goto err;
130 0 : if (!EVP_DigestUpdate(&ctx, md_tmp, mdsize))
131 : goto err;
132 0 : if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL))
133 : goto err;
134 : }
135 0 : OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp));
136 0 : memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher));
137 0 : OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16);
138 0 : memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
139 0 : EVP_CIPHER_iv_length(cipher));
140 0 : if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
141 : goto err;
142 0 : OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
143 0 : OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
144 0 : OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
145 : rv = 1;
146 : err:
147 0 : EVP_MD_CTX_cleanup(&ctx);
148 0 : return rv;
149 : }
|
