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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/cast/c_skey.c
1 /* crypto/cast/c_skey.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
59 #include <openssl/cast.h>
63 #define CAST_exp(l,A,a,n) \
66 a[n+2]=(l>> 8)&0xff; \
67 a[n+1]=(l>>16)&0xff; \
70 #define S4 CAST_S_table4
71 #define S5 CAST_S_table5
72 #define S6 CAST_S_table6
73 #define S7 CAST_S_table7
75 void CAST_set_key(CAST_KEY
*key
, int len
, const unsigned char *data
)
84 for (i
= 0; i
< 16; i
++)
88 for (i
= 0; i
< len
; i
++)
96 X
[0] = ((x
[0] << 24) | (x
[1] << 16) | (x
[2] << 8) | x
[3]) & 0xffffffffL
;
97 X
[1] = ((x
[4] << 24) | (x
[5] << 16) | (x
[6] << 8) | x
[7]) & 0xffffffffL
;
98 X
[2] = ((x
[8] << 24) | (x
[9] << 16) | (x
[10] << 8) | x
[11]) & 0xffffffffL
;
100 ((x
[12] << 24) | (x
[13] << 16) | (x
[14] << 8) | x
[15]) & 0xffffffffL
;
103 l
= X
[0] ^ S4
[x
[13]] ^ S5
[x
[15]] ^ S6
[x
[12]] ^ S7
[x
[14]] ^ S6
[x
[8]];
104 CAST_exp(l
, Z
, z
, 0);
105 l
= X
[2] ^ S4
[z
[0]] ^ S5
[z
[2]] ^ S6
[z
[1]] ^ S7
[z
[3]] ^ S7
[x
[10]];
106 CAST_exp(l
, Z
, z
, 4);
107 l
= X
[3] ^ S4
[z
[7]] ^ S5
[z
[6]] ^ S6
[z
[5]] ^ S7
[z
[4]] ^ S4
[x
[9]];
108 CAST_exp(l
, Z
, z
, 8);
109 l
= X
[1] ^ S4
[z
[10]] ^ S5
[z
[9]] ^ S6
[z
[11]] ^ S7
[z
[8]] ^ S5
[x
[11]];
110 CAST_exp(l
, Z
, z
, 12);
112 K
[0] = S4
[z
[8]] ^ S5
[z
[9]] ^ S6
[z
[7]] ^ S7
[z
[6]] ^ S4
[z
[2]];
113 K
[1] = S4
[z
[10]] ^ S5
[z
[11]] ^ S6
[z
[5]] ^ S7
[z
[4]] ^ S5
[z
[6]];
114 K
[2] = S4
[z
[12]] ^ S5
[z
[13]] ^ S6
[z
[3]] ^ S7
[z
[2]] ^ S6
[z
[9]];
115 K
[3] = S4
[z
[14]] ^ S5
[z
[15]] ^ S6
[z
[1]] ^ S7
[z
[0]] ^ S7
[z
[12]];
117 l
= Z
[2] ^ S4
[z
[5]] ^ S5
[z
[7]] ^ S6
[z
[4]] ^ S7
[z
[6]] ^ S6
[z
[0]];
118 CAST_exp(l
, X
, x
, 0);
119 l
= Z
[0] ^ S4
[x
[0]] ^ S5
[x
[2]] ^ S6
[x
[1]] ^ S7
[x
[3]] ^ S7
[z
[2]];
120 CAST_exp(l
, X
, x
, 4);
121 l
= Z
[1] ^ S4
[x
[7]] ^ S5
[x
[6]] ^ S6
[x
[5]] ^ S7
[x
[4]] ^ S4
[z
[1]];
122 CAST_exp(l
, X
, x
, 8);
123 l
= Z
[3] ^ S4
[x
[10]] ^ S5
[x
[9]] ^ S6
[x
[11]] ^ S7
[x
[8]] ^ S5
[z
[3]];
124 CAST_exp(l
, X
, x
, 12);
126 K
[4] = S4
[x
[3]] ^ S5
[x
[2]] ^ S6
[x
[12]] ^ S7
[x
[13]] ^ S4
[x
[8]];
127 K
[5] = S4
[x
[1]] ^ S5
[x
[0]] ^ S6
[x
[14]] ^ S7
[x
[15]] ^ S5
[x
[13]];
128 K
[6] = S4
[x
[7]] ^ S5
[x
[6]] ^ S6
[x
[8]] ^ S7
[x
[9]] ^ S6
[x
[3]];
129 K
[7] = S4
[x
[5]] ^ S5
[x
[4]] ^ S6
[x
[10]] ^ S7
[x
[11]] ^ S7
[x
[7]];
131 l
= X
[0] ^ S4
[x
[13]] ^ S5
[x
[15]] ^ S6
[x
[12]] ^ S7
[x
[14]] ^ S6
[x
[8]];
132 CAST_exp(l
, Z
, z
, 0);
133 l
= X
[2] ^ S4
[z
[0]] ^ S5
[z
[2]] ^ S6
[z
[1]] ^ S7
[z
[3]] ^ S7
[x
[10]];
134 CAST_exp(l
, Z
, z
, 4);
135 l
= X
[3] ^ S4
[z
[7]] ^ S5
[z
[6]] ^ S6
[z
[5]] ^ S7
[z
[4]] ^ S4
[x
[9]];
136 CAST_exp(l
, Z
, z
, 8);
137 l
= X
[1] ^ S4
[z
[10]] ^ S5
[z
[9]] ^ S6
[z
[11]] ^ S7
[z
[8]] ^ S5
[x
[11]];
138 CAST_exp(l
, Z
, z
, 12);
140 K
[8] = S4
[z
[3]] ^ S5
[z
[2]] ^ S6
[z
[12]] ^ S7
[z
[13]] ^ S4
[z
[9]];
141 K
[9] = S4
[z
[1]] ^ S5
[z
[0]] ^ S6
[z
[14]] ^ S7
[z
[15]] ^ S5
[z
[12]];
142 K
[10] = S4
[z
[7]] ^ S5
[z
[6]] ^ S6
[z
[8]] ^ S7
[z
[9]] ^ S6
[z
[2]];
143 K
[11] = S4
[z
[5]] ^ S5
[z
[4]] ^ S6
[z
[10]] ^ S7
[z
[11]] ^ S7
[z
[6]];
145 l
= Z
[2] ^ S4
[z
[5]] ^ S5
[z
[7]] ^ S6
[z
[4]] ^ S7
[z
[6]] ^ S6
[z
[0]];
146 CAST_exp(l
, X
, x
, 0);
147 l
= Z
[0] ^ S4
[x
[0]] ^ S5
[x
[2]] ^ S6
[x
[1]] ^ S7
[x
[3]] ^ S7
[z
[2]];
148 CAST_exp(l
, X
, x
, 4);
149 l
= Z
[1] ^ S4
[x
[7]] ^ S5
[x
[6]] ^ S6
[x
[5]] ^ S7
[x
[4]] ^ S4
[z
[1]];
150 CAST_exp(l
, X
, x
, 8);
151 l
= Z
[3] ^ S4
[x
[10]] ^ S5
[x
[9]] ^ S6
[x
[11]] ^ S7
[x
[8]] ^ S5
[z
[3]];
152 CAST_exp(l
, X
, x
, 12);
154 K
[12] = S4
[x
[8]] ^ S5
[x
[9]] ^ S6
[x
[7]] ^ S7
[x
[6]] ^ S4
[x
[3]];
155 K
[13] = S4
[x
[10]] ^ S5
[x
[11]] ^ S6
[x
[5]] ^ S7
[x
[4]] ^ S5
[x
[7]];
156 K
[14] = S4
[x
[12]] ^ S5
[x
[13]] ^ S6
[x
[3]] ^ S7
[x
[2]] ^ S6
[x
[8]];
157 K
[15] = S4
[x
[14]] ^ S5
[x
[15]] ^ S6
[x
[1]] ^ S7
[x
[0]] ^ S7
[x
[13]];
163 for (i
= 0; i
< 16; i
++) {
164 key
->data
[i
* 2] = k
[i
];
165 key
->data
[i
* 2 + 1] = ((k
[i
+ 16]) + 16) & 0x1f;