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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/cast/c_skey.c
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/cast.h>
62 #define CAST_exp(l,A,a,n) \
65 a[n+2]=(l>> 8)&0xff; \
66 a[n+1]=(l>>16)&0xff; \
69 #define S4 CAST_S_table4
70 #define S5 CAST_S_table5
71 #define S6 CAST_S_table6
72 #define S7 CAST_S_table7
74 void CAST_set_key(CAST_KEY
*key
, int len
, const unsigned char *data
)
83 for (i
= 0; i
< 16; i
++)
87 for (i
= 0; i
< len
; i
++)
95 X
[0] = ((x
[0] << 24) | (x
[1] << 16) | (x
[2] << 8) | x
[3]) & 0xffffffffL
;
96 X
[1] = ((x
[4] << 24) | (x
[5] << 16) | (x
[6] << 8) | x
[7]) & 0xffffffffL
;
97 X
[2] = ((x
[8] << 24) | (x
[9] << 16) | (x
[10] << 8) | x
[11]) & 0xffffffffL
;
99 ((x
[12] << 24) | (x
[13] << 16) | (x
[14] << 8) | x
[15]) & 0xffffffffL
;
102 l
= X
[0] ^ S4
[x
[13]] ^ S5
[x
[15]] ^ S6
[x
[12]] ^ S7
[x
[14]] ^ S6
[x
[8]];
103 CAST_exp(l
, Z
, z
, 0);
104 l
= X
[2] ^ S4
[z
[0]] ^ S5
[z
[2]] ^ S6
[z
[1]] ^ S7
[z
[3]] ^ S7
[x
[10]];
105 CAST_exp(l
, Z
, z
, 4);
106 l
= X
[3] ^ S4
[z
[7]] ^ S5
[z
[6]] ^ S6
[z
[5]] ^ S7
[z
[4]] ^ S4
[x
[9]];
107 CAST_exp(l
, Z
, z
, 8);
108 l
= X
[1] ^ S4
[z
[10]] ^ S5
[z
[9]] ^ S6
[z
[11]] ^ S7
[z
[8]] ^ S5
[x
[11]];
109 CAST_exp(l
, Z
, z
, 12);
111 K
[0] = S4
[z
[8]] ^ S5
[z
[9]] ^ S6
[z
[7]] ^ S7
[z
[6]] ^ S4
[z
[2]];
112 K
[1] = S4
[z
[10]] ^ S5
[z
[11]] ^ S6
[z
[5]] ^ S7
[z
[4]] ^ S5
[z
[6]];
113 K
[2] = S4
[z
[12]] ^ S5
[z
[13]] ^ S6
[z
[3]] ^ S7
[z
[2]] ^ S6
[z
[9]];
114 K
[3] = S4
[z
[14]] ^ S5
[z
[15]] ^ S6
[z
[1]] ^ S7
[z
[0]] ^ S7
[z
[12]];
116 l
= Z
[2] ^ S4
[z
[5]] ^ S5
[z
[7]] ^ S6
[z
[4]] ^ S7
[z
[6]] ^ S6
[z
[0]];
117 CAST_exp(l
, X
, x
, 0);
118 l
= Z
[0] ^ S4
[x
[0]] ^ S5
[x
[2]] ^ S6
[x
[1]] ^ S7
[x
[3]] ^ S7
[z
[2]];
119 CAST_exp(l
, X
, x
, 4);
120 l
= Z
[1] ^ S4
[x
[7]] ^ S5
[x
[6]] ^ S6
[x
[5]] ^ S7
[x
[4]] ^ S4
[z
[1]];
121 CAST_exp(l
, X
, x
, 8);
122 l
= Z
[3] ^ S4
[x
[10]] ^ S5
[x
[9]] ^ S6
[x
[11]] ^ S7
[x
[8]] ^ S5
[z
[3]];
123 CAST_exp(l
, X
, x
, 12);
125 K
[4] = S4
[x
[3]] ^ S5
[x
[2]] ^ S6
[x
[12]] ^ S7
[x
[13]] ^ S4
[x
[8]];
126 K
[5] = S4
[x
[1]] ^ S5
[x
[0]] ^ S6
[x
[14]] ^ S7
[x
[15]] ^ S5
[x
[13]];
127 K
[6] = S4
[x
[7]] ^ S5
[x
[6]] ^ S6
[x
[8]] ^ S7
[x
[9]] ^ S6
[x
[3]];
128 K
[7] = S4
[x
[5]] ^ S5
[x
[4]] ^ S6
[x
[10]] ^ S7
[x
[11]] ^ S7
[x
[7]];
130 l
= X
[0] ^ S4
[x
[13]] ^ S5
[x
[15]] ^ S6
[x
[12]] ^ S7
[x
[14]] ^ S6
[x
[8]];
131 CAST_exp(l
, Z
, z
, 0);
132 l
= X
[2] ^ S4
[z
[0]] ^ S5
[z
[2]] ^ S6
[z
[1]] ^ S7
[z
[3]] ^ S7
[x
[10]];
133 CAST_exp(l
, Z
, z
, 4);
134 l
= X
[3] ^ S4
[z
[7]] ^ S5
[z
[6]] ^ S6
[z
[5]] ^ S7
[z
[4]] ^ S4
[x
[9]];
135 CAST_exp(l
, Z
, z
, 8);
136 l
= X
[1] ^ S4
[z
[10]] ^ S5
[z
[9]] ^ S6
[z
[11]] ^ S7
[z
[8]] ^ S5
[x
[11]];
137 CAST_exp(l
, Z
, z
, 12);
139 K
[8] = S4
[z
[3]] ^ S5
[z
[2]] ^ S6
[z
[12]] ^ S7
[z
[13]] ^ S4
[z
[9]];
140 K
[9] = S4
[z
[1]] ^ S5
[z
[0]] ^ S6
[z
[14]] ^ S7
[z
[15]] ^ S5
[z
[12]];
141 K
[10] = S4
[z
[7]] ^ S5
[z
[6]] ^ S6
[z
[8]] ^ S7
[z
[9]] ^ S6
[z
[2]];
142 K
[11] = S4
[z
[5]] ^ S5
[z
[4]] ^ S6
[z
[10]] ^ S7
[z
[11]] ^ S7
[z
[6]];
144 l
= Z
[2] ^ S4
[z
[5]] ^ S5
[z
[7]] ^ S6
[z
[4]] ^ S7
[z
[6]] ^ S6
[z
[0]];
145 CAST_exp(l
, X
, x
, 0);
146 l
= Z
[0] ^ S4
[x
[0]] ^ S5
[x
[2]] ^ S6
[x
[1]] ^ S7
[x
[3]] ^ S7
[z
[2]];
147 CAST_exp(l
, X
, x
, 4);
148 l
= Z
[1] ^ S4
[x
[7]] ^ S5
[x
[6]] ^ S6
[x
[5]] ^ S7
[x
[4]] ^ S4
[z
[1]];
149 CAST_exp(l
, X
, x
, 8);
150 l
= Z
[3] ^ S4
[x
[10]] ^ S5
[x
[9]] ^ S6
[x
[11]] ^ S7
[x
[8]] ^ S5
[z
[3]];
151 CAST_exp(l
, X
, x
, 12);
153 K
[12] = S4
[x
[8]] ^ S5
[x
[9]] ^ S6
[x
[7]] ^ S7
[x
[6]] ^ S4
[x
[3]];
154 K
[13] = S4
[x
[10]] ^ S5
[x
[11]] ^ S6
[x
[5]] ^ S7
[x
[4]] ^ S5
[x
[7]];
155 K
[14] = S4
[x
[12]] ^ S5
[x
[13]] ^ S6
[x
[3]] ^ S7
[x
[2]] ^ S6
[x
[8]];
156 K
[15] = S4
[x
[14]] ^ S5
[x
[15]] ^ S6
[x
[1]] ^ S7
[x
[0]] ^ S7
[x
[13]];
162 for (i
= 0; i
< 16; i
++) {
163 key
->data
[i
* 2] = k
[i
];
164 key
->data
[i
* 2 + 1] = ((k
[i
+ 16]) + 16) & 0x1f;