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d02b48c6 | 1 | /* crypto/des/fcrypt_b.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
40720ce3 | 8 | * |
d02b48c6 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
40720ce3 | 15 | * |
d02b48c6 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
40720ce3 | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
40720ce3 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40720ce3 | 40 | * |
d02b48c6 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
40720ce3 | 52 | * |
d02b48c6 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | ||
40720ce3 MC |
61 | /* |
62 | * This version of crypt has been developed from my MIT compatible DES | |
63 | * library. The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au | |
d02b48c6 RE |
64 | * Eric Young (eay@cryptsoft.com) |
65 | */ | |
66 | ||
67 | #define DES_FCRYPT | |
68 | #include "des_locl.h" | |
69 | #undef DES_FCRYPT | |
70 | ||
71 | #undef PERM_OP | |
72 | #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ | |
40720ce3 MC |
73 | (b)^=(t),\ |
74 | (a)^=((t)<<(n))) | |
d02b48c6 RE |
75 | |
76 | #undef HPERM_OP | |
77 | #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ | |
40720ce3 | 78 | (a)=(a)^(t)^(t>>(16-(n))))\ |
d02b48c6 | 79 | |
c2e4f17c | 80 | void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0, |
40720ce3 MC |
81 | DES_LONG Eswap1) |
82 | { | |
83 | register DES_LONG l, r, t, u; | |
d02b48c6 | 84 | #ifdef DES_PTR |
40720ce3 | 85 | register const unsigned char *des_SP = (const unsigned char *)DES_SPtrans; |
d02b48c6 | 86 | #endif |
40720ce3 MC |
87 | register DES_LONG *s; |
88 | register int j; | |
89 | register DES_LONG E0, E1; | |
d02b48c6 | 90 | |
40720ce3 MC |
91 | l = 0; |
92 | r = 0; | |
d02b48c6 | 93 | |
40720ce3 MC |
94 | s = (DES_LONG *)ks; |
95 | E0 = Eswap0; | |
96 | E1 = Eswap1; | |
d02b48c6 | 97 | |
40720ce3 | 98 | for (j = 0; j < 25; j++) { |
837174dd | 99 | #ifndef DES_UNROLL |
40720ce3 | 100 | register int i; |
d02b48c6 | 101 | |
40720ce3 MC |
102 | for (i = 0; i < 32; i += 8) { |
103 | D_ENCRYPT(l, r, i + 0); /* 1 */ | |
104 | D_ENCRYPT(r, l, i + 2); /* 2 */ | |
105 | D_ENCRYPT(l, r, i + 4); /* 1 */ | |
106 | D_ENCRYPT(r, l, i + 6); /* 2 */ | |
107 | } | |
d02b48c6 | 108 | #else |
40720ce3 MC |
109 | D_ENCRYPT(l, r, 0); /* 1 */ |
110 | D_ENCRYPT(r, l, 2); /* 2 */ | |
111 | D_ENCRYPT(l, r, 4); /* 3 */ | |
112 | D_ENCRYPT(r, l, 6); /* 4 */ | |
113 | D_ENCRYPT(l, r, 8); /* 5 */ | |
114 | D_ENCRYPT(r, l, 10); /* 6 */ | |
115 | D_ENCRYPT(l, r, 12); /* 7 */ | |
116 | D_ENCRYPT(r, l, 14); /* 8 */ | |
117 | D_ENCRYPT(l, r, 16); /* 9 */ | |
118 | D_ENCRYPT(r, l, 18); /* 10 */ | |
119 | D_ENCRYPT(l, r, 20); /* 11 */ | |
120 | D_ENCRYPT(r, l, 22); /* 12 */ | |
121 | D_ENCRYPT(l, r, 24); /* 13 */ | |
122 | D_ENCRYPT(r, l, 26); /* 14 */ | |
123 | D_ENCRYPT(l, r, 28); /* 15 */ | |
124 | D_ENCRYPT(r, l, 30); /* 16 */ | |
d02b48c6 RE |
125 | #endif |
126 | ||
40720ce3 MC |
127 | t = l; |
128 | l = r; | |
129 | r = t; | |
130 | } | |
131 | l = ROTATE(l, 3) & 0xffffffffL; | |
132 | r = ROTATE(r, 3) & 0xffffffffL; | |
d02b48c6 | 133 | |
40720ce3 MC |
134 | PERM_OP(l, r, t, 1, 0x55555555L); |
135 | PERM_OP(r, l, t, 8, 0x00ff00ffL); | |
136 | PERM_OP(l, r, t, 2, 0x33333333L); | |
137 | PERM_OP(r, l, t, 16, 0x0000ffffL); | |
138 | PERM_OP(l, r, t, 4, 0x0f0f0f0fL); | |
d02b48c6 | 139 | |
40720ce3 MC |
140 | out[0] = r; |
141 | out[1] = l; | |
142 | } |