]>
Commit | Line | Data |
---|---|---|
d02b48c6 RE |
1 | /* crypto/des/fcrypt_b.c */ |
2 | /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) | |
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. | |
8 | * | |
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). | |
15 | * | |
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. | |
22 | * | |
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 :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
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. | |
52 | * | |
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 | ||
61 | /* This version of crypt has been developed from my MIT compatable | |
62 | * DES library. | |
63 | * The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au | |
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)),\ | |
73 | (b)^=(t),\ | |
74 | (a)^=((t)<<(n))) | |
75 | ||
76 | #undef HPERM_OP | |
77 | #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ | |
78 | (a)=(a)^(t)^(t>>(16-(n))))\ | |
79 | ||
80 | void fcrypt_body(out, ks, Eswap0, Eswap1) | |
81 | DES_LONG *out; | |
82 | des_key_schedule ks; | |
83 | DES_LONG Eswap0; | |
84 | DES_LONG Eswap1; | |
85 | { | |
86 | register DES_LONG l,r,t,u; | |
87 | #ifdef DES_PTR | |
88 | register unsigned char *des_SP=(unsigned char *)des_SPtrans; | |
89 | #endif | |
90 | register DES_LONG *s; | |
91 | register int j; | |
92 | register DES_LONG E0,E1; | |
93 | ||
94 | l=0; | |
95 | r=0; | |
96 | ||
97 | s=(DES_LONG *)ks; | |
98 | E0=Eswap0; | |
99 | E1=Eswap1; | |
100 | ||
101 | for (j=0; j<25; j++) | |
102 | { | |
103 | #ifdef DES_UNROLL | |
104 | register int i; | |
105 | ||
106 | for (i=0; i<32; i+=8) | |
107 | { | |
108 | D_ENCRYPT(l,r,i+0); /* 1 */ | |
109 | D_ENCRYPT(r,l,i+2); /* 2 */ | |
110 | D_ENCRYPT(l,r,i+4); /* 1 */ | |
111 | D_ENCRYPT(r,l,i+6); /* 2 */ | |
112 | } | |
113 | #else | |
114 | D_ENCRYPT(l,r, 0); /* 1 */ | |
115 | D_ENCRYPT(r,l, 2); /* 2 */ | |
116 | D_ENCRYPT(l,r, 4); /* 3 */ | |
117 | D_ENCRYPT(r,l, 6); /* 4 */ | |
118 | D_ENCRYPT(l,r, 8); /* 5 */ | |
119 | D_ENCRYPT(r,l,10); /* 6 */ | |
120 | D_ENCRYPT(l,r,12); /* 7 */ | |
121 | D_ENCRYPT(r,l,14); /* 8 */ | |
122 | D_ENCRYPT(l,r,16); /* 9 */ | |
123 | D_ENCRYPT(r,l,18); /* 10 */ | |
124 | D_ENCRYPT(l,r,20); /* 11 */ | |
125 | D_ENCRYPT(r,l,22); /* 12 */ | |
126 | D_ENCRYPT(l,r,24); /* 13 */ | |
127 | D_ENCRYPT(r,l,26); /* 14 */ | |
128 | D_ENCRYPT(l,r,28); /* 15 */ | |
129 | D_ENCRYPT(r,l,30); /* 16 */ | |
130 | #endif | |
131 | ||
132 | t=l; | |
133 | l=r; | |
134 | r=t; | |
135 | } | |
136 | l=ROTATE(l,3)&0xffffffffL; | |
137 | r=ROTATE(r,3)&0xffffffffL; | |
138 | ||
139 | PERM_OP(l,r,t, 1,0x55555555L); | |
140 | PERM_OP(r,l,t, 8,0x00ff00ffL); | |
141 | PERM_OP(l,r,t, 2,0x33333333L); | |
142 | PERM_OP(r,l,t,16,0x0000ffffL); | |
143 | PERM_OP(l,r,t, 4,0x0f0f0f0fL); | |
144 | ||
145 | out[0]=r; | |
146 | out[1]=l; | |
147 | } | |
148 |