1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
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 :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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
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.]
58 #include <openssl/crypto.h>
61 void DES_string_to_key(const char *str, DES_cblock *key)
65 register unsigned char j;
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++) {
76 (*key)[i % 8] ^= (j << 1);
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;
86 DES_set_odd_parity(key);
87 #ifdef EXPERIMENTAL_STR_TO_STRONG_KEY
88 if (DES_is_weak_key(key))
90 DES_set_key(key, &ks);
92 DES_set_key_unchecked(key, &ks);
94 DES_cbc_cksum((const unsigned char *)str, key, length, &ks, key);
95 OPENSSL_cleanse(&ks, sizeof(ks));
96 DES_set_odd_parity(key);
99 void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2)
103 register unsigned char j;
107 length = strlen(str);
108 #ifdef OLD_STR_TO_KEY
110 for (i = 0; i < length; i++) {
111 (*key2)[i] = (*key1)[i] = (str[i] << 1);
114 for (i = 0; i < length; i++) {
116 (*key2)[i % 8] ^= (str[i] << 1);
118 (*key1)[i % 8] ^= (str[i] << 1);
121 #else /* MIT COMPATIBLE */
122 for (i = 0; i < length; i++) {
126 (*key1)[i % 8] ^= (j << 1);
128 (*key2)[i % 8] ^= (j << 1);
130 j = ((j << 4) & 0xf0) | ((j >> 4) & 0x0f);
131 j = ((j << 2) & 0xcc) | ((j >> 2) & 0x33);
132 j = ((j << 1) & 0xaa) | ((j >> 1) & 0x55);
134 (*key1)[7 - (i % 8)] ^= j;
136 (*key2)[7 - (i % 8)] ^= j;
140 memcpy(key2, key1, 8);
142 DES_set_odd_parity(key1);
143 DES_set_odd_parity(key2);
144 #ifdef EXPERIMENTAL_STR_TO_STRONG_KEY
145 if (DES_is_weak_key(key1))
147 DES_set_key(key1, &ks);
149 DES_set_key_unchecked(key1, &ks);
151 DES_cbc_cksum((const unsigned char *)str, key1, length, &ks, key1);
152 #ifdef EXPERIMENTAL_STR_TO_STRONG_KEY
153 if (DES_is_weak_key(key2))
155 DES_set_key(key2, &ks);
157 DES_set_key_unchecked(key2, &ks);
159 DES_cbc_cksum((const unsigned char *)str, key2, length, &ks, key2);
160 OPENSSL_cleanse(&ks, sizeof(ks));
161 DES_set_odd_parity(key1);
162 DES_set_odd_parity(key2);