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0f113f3e MC |
1 | /* |
2 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
3 | * 1999. | |
ef8335d9 DSH |
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 | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
ef8335d9 DSH |
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> | |
b39fc560 | 61 | #include "internal/cryptlib.h" |
ef8335d9 DSH |
62 | #include <openssl/x509.h> |
63 | #include <openssl/evp.h> | |
ef8335d9 | 64 | |
0f113f3e MC |
65 | /* |
66 | * Doesn't do anything now: Builtin PBE algorithms in static table. | |
ef8335d9 DSH |
67 | */ |
68 | ||
69 | void PKCS5_PBE_add(void) | |
70 | { | |
ef8335d9 DSH |
71 | } |
72 | ||
2bd83ca1 | 73 | int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen, |
0f113f3e MC |
74 | ASN1_TYPE *param, const EVP_CIPHER *cipher, |
75 | const EVP_MD *md, int en_de) | |
ef8335d9 | 76 | { |
77a01145 | 77 | EVP_MD_CTX *ctx; |
0f113f3e MC |
78 | unsigned char md_tmp[EVP_MAX_MD_SIZE]; |
79 | unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH]; | |
80 | int i; | |
81 | PBEPARAM *pbe; | |
82 | int saltlen, iter; | |
83 | unsigned char *salt; | |
0f113f3e MC |
84 | int mdsize; |
85 | int rv = 0; | |
69cbf468 | 86 | |
0f113f3e MC |
87 | /* Extract useful info from parameter */ |
88 | if (param == NULL || param->type != V_ASN1_SEQUENCE || | |
89 | param->value.sequence == NULL) { | |
90 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR); | |
91 | return 0; | |
92 | } | |
c755c5fd | 93 | |
e93c8748 DSH |
94 | pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), param); |
95 | if (pbe == NULL) { | |
0f113f3e MC |
96 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR); |
97 | return 0; | |
98 | } | |
69cbf468 | 99 | |
0f113f3e MC |
100 | if (!pbe->iter) |
101 | iter = 1; | |
102 | else | |
103 | iter = ASN1_INTEGER_get(pbe->iter); | |
104 | salt = pbe->salt->data; | |
105 | saltlen = pbe->salt->length; | |
69cbf468 | 106 | |
0f113f3e MC |
107 | if (!pass) |
108 | passlen = 0; | |
109 | else if (passlen == -1) | |
110 | passlen = strlen(pass); | |
a331a305 | 111 | |
bfb0641f | 112 | ctx = EVP_MD_CTX_new(); |
77a01145 RL |
113 | if (ctx == NULL) { |
114 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 115 | goto err; |
77a01145 RL |
116 | } |
117 | ||
118 | if (!EVP_DigestInit_ex(ctx, md, NULL)) | |
119 | goto err; | |
120 | if (!EVP_DigestUpdate(ctx, pass, passlen)) | |
0f113f3e | 121 | goto err; |
77a01145 | 122 | if (!EVP_DigestUpdate(ctx, salt, saltlen)) |
0f113f3e MC |
123 | goto err; |
124 | PBEPARAM_free(pbe); | |
77a01145 | 125 | if (!EVP_DigestFinal_ex(ctx, md_tmp, NULL)) |
0f113f3e MC |
126 | goto err; |
127 | mdsize = EVP_MD_size(md); | |
128 | if (mdsize < 0) | |
129 | return 0; | |
130 | for (i = 1; i < iter; i++) { | |
77a01145 | 131 | if (!EVP_DigestInit_ex(ctx, md, NULL)) |
0f113f3e | 132 | goto err; |
77a01145 | 133 | if (!EVP_DigestUpdate(ctx, md_tmp, mdsize)) |
0f113f3e | 134 | goto err; |
77a01145 | 135 | if (!EVP_DigestFinal_ex(ctx, md_tmp, NULL)) |
0f113f3e MC |
136 | goto err; |
137 | } | |
138 | OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp)); | |
139 | memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher)); | |
140 | OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16); | |
141 | memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)), | |
142 | EVP_CIPHER_iv_length(cipher)); | |
143 | if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de)) | |
144 | goto err; | |
145 | OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE); | |
146 | OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH); | |
147 | OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH); | |
148 | rv = 1; | |
149 | err: | |
bfb0641f | 150 | EVP_MD_CTX_free(ctx); |
0f113f3e | 151 | return rv; |
ef8335d9 | 152 | } |