OLD | NEW |
| (Empty) |
1 /* crypto/des/fcrypt_b.c */ | |
2 /* Copyright (C) 1995-1998 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 compatible | |
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(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0, | |
81 DES_LONG Eswap1) | |
82 { | |
83 register DES_LONG l,r,t,u; | |
84 #ifdef DES_PTR | |
85 register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; | |
86 #endif | |
87 register DES_LONG *s; | |
88 register int j; | |
89 register DES_LONG E0,E1; | |
90 | |
91 l=0; | |
92 r=0; | |
93 | |
94 s=(DES_LONG *)ks; | |
95 E0=Eswap0; | |
96 E1=Eswap1; | |
97 | |
98 for (j=0; j<25; j++) | |
99 { | |
100 #ifndef DES_UNROLL | |
101 register int i; | |
102 | |
103 for (i=0; i<32; i+=4) | |
104 { | |
105 D_ENCRYPT(l,r,i+0); /* 1 */ | |
106 D_ENCRYPT(r,l,i+2); /* 2 */ | |
107 } | |
108 #else | |
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 */ | |
125 #endif | |
126 | |
127 t=l; | |
128 l=r; | |
129 r=t; | |
130 } | |
131 l=ROTATE(l,3)&0xffffffffL; | |
132 r=ROTATE(r,3)&0xffffffffL; | |
133 | |
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); | |
139 | |
140 out[0]=r; | |
141 out[1]=l; | |
142 } | |
143 | |
OLD | NEW |