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ef8335d9 | 1 | /* p5_crpt.c */ |
2e597528 | 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
ef8335d9 DSH |
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> | |
7b63c0fa | 61 | #include "cryptlib.h" |
ef8335d9 DSH |
62 | #include <openssl/x509.h> |
63 | #include <openssl/evp.h> | |
ef8335d9 | 64 | |
b8f702a0 | 65 | /* Doesn't do anything now: Builtin PBE algorithms in static table. |
ef8335d9 DSH |
66 | */ |
67 | ||
68 | void PKCS5_PBE_add(void) | |
69 | { | |
ef8335d9 DSH |
70 | } |
71 | ||
2bd83ca1 | 72 | int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen, |
13588350 | 73 | ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md, |
2bd83ca1 | 74 | int en_de) |
ef8335d9 DSH |
75 | { |
76 | EVP_MD_CTX ctx; | |
77 | unsigned char md_tmp[EVP_MAX_MD_SIZE]; | |
2bd83ca1 | 78 | unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH]; |
ef8335d9 | 79 | int i; |
69cbf468 DSH |
80 | PBEPARAM *pbe; |
81 | int saltlen, iter; | |
875a644a RL |
82 | unsigned char *salt; |
83 | const unsigned char *pbuf; | |
69cbf468 DSH |
84 | |
85 | /* Extract useful info from parameter */ | |
c755c5fd NL |
86 | if (param == NULL || param->type != V_ASN1_SEQUENCE || |
87 | param->value.sequence == NULL) { | |
88 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR); | |
89 | return 0; | |
90 | } | |
91 | ||
69cbf468 | 92 | pbuf = param->value.sequence->data; |
c755c5fd | 93 | if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) { |
97e4a932 | 94 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR); |
69cbf468 DSH |
95 | return 0; |
96 | } | |
97 | ||
98 | if (!pbe->iter) iter = 1; | |
99 | else iter = ASN1_INTEGER_get (pbe->iter); | |
100 | salt = pbe->salt->data; | |
101 | saltlen = pbe->salt->length; | |
102 | ||
a331a305 DSH |
103 | if(!pass) passlen = 0; |
104 | else if(passlen == -1) passlen = strlen(pass); | |
105 | ||
dbad1690 | 106 | EVP_MD_CTX_init(&ctx); |
20d2186c DSH |
107 | EVP_DigestInit_ex(&ctx, md, NULL); |
108 | EVP_DigestUpdate(&ctx, pass, passlen); | |
109 | EVP_DigestUpdate(&ctx, salt, saltlen); | |
69cbf468 | 110 | PBEPARAM_free(pbe); |
20d2186c | 111 | EVP_DigestFinal_ex(&ctx, md_tmp, NULL); |
ef8335d9 | 112 | for (i = 1; i < iter; i++) { |
20d2186c | 113 | EVP_DigestInit_ex(&ctx, md, NULL); |
ef8335d9 | 114 | EVP_DigestUpdate(&ctx, md_tmp, EVP_MD_size(md)); |
20d2186c | 115 | EVP_DigestFinal_ex (&ctx, md_tmp, NULL); |
ef8335d9 | 116 | } |
dbad1690 | 117 | EVP_MD_CTX_cleanup(&ctx); |
27545970 | 118 | OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp)); |
20d2186c | 119 | memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher)); |
54a656ef | 120 | OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16); |
20d2186c | 121 | memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)), |
ef8335d9 | 122 | EVP_CIPHER_iv_length(cipher)); |
581f1c84 | 123 | EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de); |
4579924b RL |
124 | OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE); |
125 | OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH); | |
126 | OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH); | |
ef8335d9 DSH |
127 | return 1; |
128 | } |