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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
57 | ||
298a2f9e | 58 | #include <openssl/crypto.h> |
d749e108 | 59 | #include "des_locl.h" |
d02b48c6 | 60 | |
c2e4f17c | 61 | void DES_string_to_key(const char *str, DES_cblock *key) |
0f113f3e MC |
62 | { |
63 | DES_key_schedule ks; | |
64 | int i, length; | |
65 | register unsigned char j; | |
d02b48c6 | 66 | |
0f113f3e MC |
67 | memset(key, 0, 8); |
68 | length = strlen(str); | |
d02b48c6 | 69 | #ifdef OLD_STR_TO_KEY |
0f113f3e MC |
70 | for (i = 0; i < length; i++) |
71 | (*key)[i % 8] ^= (str[i] << 1); | |
72 | #else /* MIT COMPATIBLE */ | |
73 | for (i = 0; i < length; i++) { | |
74 | j = str[i]; | |
75 | if ((i % 16) < 8) | |
76 | (*key)[i % 8] ^= (j << 1); | |
77 | else { | |
78 | /* Reverse the bit order 05/05/92 eay */ | |
79 | j = ((j << 4) & 0xf0) | ((j >> 4) & 0x0f); | |
80 | j = ((j << 2) & 0xcc) | ((j >> 2) & 0x33); | |
81 | j = ((j << 1) & 0xaa) | ((j >> 1) & 0x55); | |
82 | (*key)[7 - (i % 8)] ^= j; | |
83 | } | |
84 | } | |
d02b48c6 | 85 | #endif |
0f113f3e | 86 | DES_set_odd_parity(key); |
0f113f3e | 87 | DES_set_key_unchecked(key, &ks); |
0f113f3e MC |
88 | DES_cbc_cksum((const unsigned char *)str, key, length, &ks, key); |
89 | OPENSSL_cleanse(&ks, sizeof(ks)); | |
90 | DES_set_odd_parity(key); | |
91 | } | |
d02b48c6 | 92 | |
c2e4f17c | 93 | void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2) |
0f113f3e MC |
94 | { |
95 | DES_key_schedule ks; | |
96 | int i, length; | |
97 | register unsigned char j; | |
d02b48c6 | 98 | |
0f113f3e MC |
99 | memset(key1, 0, 8); |
100 | memset(key2, 0, 8); | |
101 | length = strlen(str); | |
d02b48c6 | 102 | #ifdef OLD_STR_TO_KEY |
0f113f3e MC |
103 | if (length <= 8) { |
104 | for (i = 0; i < length; i++) { | |
105 | (*key2)[i] = (*key1)[i] = (str[i] << 1); | |
106 | } | |
107 | } else { | |
108 | for (i = 0; i < length; i++) { | |
109 | if ((i / 8) & 1) | |
110 | (*key2)[i % 8] ^= (str[i] << 1); | |
111 | else | |
112 | (*key1)[i % 8] ^= (str[i] << 1); | |
113 | } | |
114 | } | |
115 | #else /* MIT COMPATIBLE */ | |
116 | for (i = 0; i < length; i++) { | |
117 | j = str[i]; | |
118 | if ((i % 32) < 16) { | |
119 | if ((i % 16) < 8) | |
120 | (*key1)[i % 8] ^= (j << 1); | |
121 | else | |
122 | (*key2)[i % 8] ^= (j << 1); | |
123 | } else { | |
124 | j = ((j << 4) & 0xf0) | ((j >> 4) & 0x0f); | |
125 | j = ((j << 2) & 0xcc) | ((j >> 2) & 0x33); | |
126 | j = ((j << 1) & 0xaa) | ((j >> 1) & 0x55); | |
127 | if ((i % 16) < 8) | |
128 | (*key1)[7 - (i % 8)] ^= j; | |
129 | else | |
130 | (*key2)[7 - (i % 8)] ^= j; | |
131 | } | |
132 | } | |
133 | if (length <= 8) | |
134 | memcpy(key2, key1, 8); | |
d02b48c6 | 135 | #endif |
0f113f3e MC |
136 | DES_set_odd_parity(key1); |
137 | DES_set_odd_parity(key2); | |
0f113f3e | 138 | DES_set_key_unchecked(key1, &ks); |
0f113f3e | 139 | DES_cbc_cksum((const unsigned char *)str, key1, length, &ks, key1); |
0f113f3e | 140 | DES_set_key_unchecked(key2, &ks); |
0f113f3e MC |
141 | DES_cbc_cksum((const unsigned char *)str, key2, length, &ks, key2); |
142 | OPENSSL_cleanse(&ks, sizeof(ks)); | |
143 | DES_set_odd_parity(key1); | |
144 | DES_set_odd_parity(key2); | |
145 | } |