Branch data Line data Source code
1 : : /* p5_crpt.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 <stdlib.h>
61 : : #include "cryptlib.h"
62 : : #include <openssl/x509.h>
63 : : #include <openssl/evp.h>
64 : :
65 : : /* Doesn't do anything now: Builtin PBE algorithms in static table.
66 : : */
67 : :
68 : 0 : void PKCS5_PBE_add(void)
69 : : {
70 : 0 : }
71 : :
72 : 0 : int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
73 : : ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md,
74 : : int en_de)
75 : : {
76 : : EVP_MD_CTX ctx;
77 : : unsigned char md_tmp[EVP_MAX_MD_SIZE];
78 : : unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
79 : : int i;
80 : : PBEPARAM *pbe;
81 : : int saltlen, iter;
82 : : unsigned char *salt;
83 : : const unsigned char *pbuf;
84 : : int mdsize;
85 : 0 : int rv = 0;
86 : 0 : EVP_MD_CTX_init(&ctx);
87 : :
88 : : /* Extract useful info from parameter */
89 [ # # ][ # # ]: 0 : if (param == NULL || param->type != V_ASN1_SEQUENCE ||
[ # # ]
90 : 0 : param->value.sequence == NULL) {
91 : 0 : EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
92 : 0 : return 0;
93 : : }
94 : :
95 : 0 : pbuf = param->value.sequence->data;
96 [ # # ]: 0 : if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {
97 : 0 : EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
98 : 0 : return 0;
99 : : }
100 : :
101 [ # # ]: 0 : if (!pbe->iter) iter = 1;
102 : 0 : else iter = ASN1_INTEGER_get (pbe->iter);
103 : 0 : salt = pbe->salt->data;
104 : 0 : saltlen = pbe->salt->length;
105 : :
106 [ # # ]: 0 : if(!pass) passlen = 0;
107 [ # # ]: 0 : else if(passlen == -1) passlen = strlen(pass);
108 : :
109 [ # # ]: 0 : if (!EVP_DigestInit_ex(&ctx, md, NULL))
110 : : goto err;
111 [ # # ]: 0 : if (!EVP_DigestUpdate(&ctx, pass, passlen))
112 : : goto err;
113 [ # # ]: 0 : if (!EVP_DigestUpdate(&ctx, salt, saltlen))
114 : : goto err;
115 : 0 : PBEPARAM_free(pbe);
116 [ # # ]: 0 : if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL))
117 : : goto err;
118 : 0 : mdsize = EVP_MD_size(md);
119 [ # # ]: 0 : if (mdsize < 0)
120 : : return 0;
121 [ # # ]: 0 : for (i = 1; i < iter; i++) {
122 [ # # ]: 0 : if (!EVP_DigestInit_ex(&ctx, md, NULL))
123 : : goto err;
124 [ # # ]: 0 : if (!EVP_DigestUpdate(&ctx, md_tmp, mdsize))
125 : : goto err;
126 [ # # ]: 0 : if (!EVP_DigestFinal_ex (&ctx, md_tmp, NULL))
127 : : goto err;
128 : : }
129 [ # # ]: 0 : OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp));
130 : 0 : memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher));
131 [ # # ]: 0 : OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16);
132 : 0 : memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
133 : 0 : EVP_CIPHER_iv_length(cipher));
134 [ # # ]: 0 : if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
135 : : goto err;
136 : 0 : OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
137 : 0 : OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
138 : 0 : OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
139 : 0 : rv = 1;
140 : : err:
141 : 0 : EVP_MD_CTX_cleanup(&ctx);
142 : 0 : return rv;
143 : : }
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