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ef8335d9 | 1 | /* p5_crpt.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
4 | * 1999. | |
ef8335d9 DSH |
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 | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
ef8335d9 DSH |
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> | |
7b63c0fa | 62 | #include "cryptlib.h" |
ef8335d9 DSH |
63 | #include <openssl/x509.h> |
64 | #include <openssl/evp.h> | |
ef8335d9 | 65 | |
0f113f3e MC |
66 | /* |
67 | * Doesn't do anything now: Builtin PBE algorithms in static table. | |
ef8335d9 DSH |
68 | */ |
69 | ||
70 | void PKCS5_PBE_add(void) | |
71 | { | |
ef8335d9 DSH |
72 | } |
73 | ||
2bd83ca1 | 74 | int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen, |
0f113f3e MC |
75 | ASN1_TYPE *param, const EVP_CIPHER *cipher, |
76 | const EVP_MD *md, int en_de) | |
ef8335d9 | 77 | { |
0f113f3e MC |
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 | EVP_MD_CTX_init(&ctx); | |
69cbf468 | 89 | |
0f113f3e MC |
90 | /* Extract useful info from parameter */ |
91 | if (param == NULL || param->type != V_ASN1_SEQUENCE || | |
92 | param->value.sequence == NULL) { | |
93 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR); | |
94 | return 0; | |
95 | } | |
c755c5fd | 96 | |
0f113f3e MC |
97 | pbuf = param->value.sequence->data; |
98 | if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) { | |
99 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR); | |
100 | return 0; | |
101 | } | |
69cbf468 | 102 | |
0f113f3e MC |
103 | if (!pbe->iter) |
104 | iter = 1; | |
105 | else | |
106 | iter = ASN1_INTEGER_get(pbe->iter); | |
107 | salt = pbe->salt->data; | |
108 | saltlen = pbe->salt->length; | |
69cbf468 | 109 | |
0f113f3e MC |
110 | if (!pass) |
111 | passlen = 0; | |
112 | else if (passlen == -1) | |
113 | passlen = strlen(pass); | |
a331a305 | 114 | |
0f113f3e MC |
115 | if (!EVP_DigestInit_ex(&ctx, md, NULL)) |
116 | goto err; | |
117 | if (!EVP_DigestUpdate(&ctx, pass, passlen)) | |
118 | goto err; | |
119 | if (!EVP_DigestUpdate(&ctx, salt, saltlen)) | |
120 | goto err; | |
121 | PBEPARAM_free(pbe); | |
122 | if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL)) | |
123 | goto err; | |
124 | mdsize = EVP_MD_size(md); | |
125 | if (mdsize < 0) | |
126 | return 0; | |
127 | for (i = 1; i < iter; i++) { | |
128 | if (!EVP_DigestInit_ex(&ctx, md, NULL)) | |
129 | goto err; | |
130 | if (!EVP_DigestUpdate(&ctx, md_tmp, mdsize)) | |
131 | goto err; | |
132 | if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL)) | |
133 | goto err; | |
134 | } | |
135 | OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp)); | |
136 | memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher)); | |
137 | OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16); | |
138 | memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)), | |
139 | EVP_CIPHER_iv_length(cipher)); | |
140 | if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de)) | |
141 | goto err; | |
142 | OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE); | |
143 | OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH); | |
144 | OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH); | |
145 | rv = 1; | |
146 | err: | |
147 | EVP_MD_CTX_cleanup(&ctx); | |
148 | return rv; | |
ef8335d9 | 149 | } |