1*0Sstevel@tonic-gate /* crypto/cast/c_skey.c */
2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*0Sstevel@tonic-gate * All rights reserved.
4*0Sstevel@tonic-gate *
5*0Sstevel@tonic-gate * This package is an SSL implementation written
6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com).
7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as
10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions
11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA,
12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms
14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*0Sstevel@tonic-gate *
16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in
17*0Sstevel@tonic-gate * the code are not to be removed.
18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution
19*0Sstevel@tonic-gate * as the author of the parts of the library used.
20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or
21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package.
22*0Sstevel@tonic-gate *
23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
25*0Sstevel@tonic-gate * are met:
26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright
27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
32*0Sstevel@tonic-gate * must display the following acknowledgement:
33*0Sstevel@tonic-gate * "This product includes cryptographic software written by
34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)"
35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library
36*0Sstevel@tonic-gate * being used are not cryptographic related :-).
37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from
38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement:
39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*0Sstevel@tonic-gate *
41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*0Sstevel@tonic-gate * SUCH DAMAGE.
52*0Sstevel@tonic-gate *
53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or
54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be
55*0Sstevel@tonic-gate * copied and put under another distribution licence
56*0Sstevel@tonic-gate * [including the GNU Public Licence.]
57*0Sstevel@tonic-gate */
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate #include <openssl/cast.h>
60*0Sstevel@tonic-gate #include "cast_lcl.h"
61*0Sstevel@tonic-gate #include "cast_s.h"
62*0Sstevel@tonic-gate
63*0Sstevel@tonic-gate #define CAST_exp(l,A,a,n) \
64*0Sstevel@tonic-gate A[n/4]=l; \
65*0Sstevel@tonic-gate a[n+3]=(l )&0xff; \
66*0Sstevel@tonic-gate a[n+2]=(l>> 8)&0xff; \
67*0Sstevel@tonic-gate a[n+1]=(l>>16)&0xff; \
68*0Sstevel@tonic-gate a[n+0]=(l>>24)&0xff;
69*0Sstevel@tonic-gate
70*0Sstevel@tonic-gate #define S4 CAST_S_table4
71*0Sstevel@tonic-gate #define S5 CAST_S_table5
72*0Sstevel@tonic-gate #define S6 CAST_S_table6
73*0Sstevel@tonic-gate #define S7 CAST_S_table7
74*0Sstevel@tonic-gate
CAST_set_key(CAST_KEY * key,int len,const unsigned char * data)75*0Sstevel@tonic-gate void CAST_set_key(CAST_KEY *key, int len, const unsigned char *data)
76*0Sstevel@tonic-gate {
77*0Sstevel@tonic-gate CAST_LONG x[16];
78*0Sstevel@tonic-gate CAST_LONG z[16];
79*0Sstevel@tonic-gate CAST_LONG k[32];
80*0Sstevel@tonic-gate CAST_LONG X[4],Z[4];
81*0Sstevel@tonic-gate CAST_LONG l,*K;
82*0Sstevel@tonic-gate int i;
83*0Sstevel@tonic-gate
84*0Sstevel@tonic-gate for (i=0; i<16; i++) x[i]=0;
85*0Sstevel@tonic-gate if (len > 16) len=16;
86*0Sstevel@tonic-gate for (i=0; i<len; i++)
87*0Sstevel@tonic-gate x[i]=data[i];
88*0Sstevel@tonic-gate if(len <= 10)
89*0Sstevel@tonic-gate key->short_key=1;
90*0Sstevel@tonic-gate else
91*0Sstevel@tonic-gate key->short_key=0;
92*0Sstevel@tonic-gate
93*0Sstevel@tonic-gate K= &k[0];
94*0Sstevel@tonic-gate X[0]=((x[ 0]<<24)|(x[ 1]<<16)|(x[ 2]<<8)|x[ 3])&0xffffffffL;
95*0Sstevel@tonic-gate X[1]=((x[ 4]<<24)|(x[ 5]<<16)|(x[ 6]<<8)|x[ 7])&0xffffffffL;
96*0Sstevel@tonic-gate X[2]=((x[ 8]<<24)|(x[ 9]<<16)|(x[10]<<8)|x[11])&0xffffffffL;
97*0Sstevel@tonic-gate X[3]=((x[12]<<24)|(x[13]<<16)|(x[14]<<8)|x[15])&0xffffffffL;
98*0Sstevel@tonic-gate
99*0Sstevel@tonic-gate for (;;)
100*0Sstevel@tonic-gate {
101*0Sstevel@tonic-gate l=X[0]^S4[x[13]]^S5[x[15]]^S6[x[12]]^S7[x[14]]^S6[x[ 8]];
102*0Sstevel@tonic-gate CAST_exp(l,Z,z, 0);
103*0Sstevel@tonic-gate l=X[2]^S4[z[ 0]]^S5[z[ 2]]^S6[z[ 1]]^S7[z[ 3]]^S7[x[10]];
104*0Sstevel@tonic-gate CAST_exp(l,Z,z, 4);
105*0Sstevel@tonic-gate l=X[3]^S4[z[ 7]]^S5[z[ 6]]^S6[z[ 5]]^S7[z[ 4]]^S4[x[ 9]];
106*0Sstevel@tonic-gate CAST_exp(l,Z,z, 8);
107*0Sstevel@tonic-gate l=X[1]^S4[z[10]]^S5[z[ 9]]^S6[z[11]]^S7[z[ 8]]^S5[x[11]];
108*0Sstevel@tonic-gate CAST_exp(l,Z,z,12);
109*0Sstevel@tonic-gate
110*0Sstevel@tonic-gate K[ 0]= S4[z[ 8]]^S5[z[ 9]]^S6[z[ 7]]^S7[z[ 6]]^S4[z[ 2]];
111*0Sstevel@tonic-gate K[ 1]= S4[z[10]]^S5[z[11]]^S6[z[ 5]]^S7[z[ 4]]^S5[z[ 6]];
112*0Sstevel@tonic-gate K[ 2]= S4[z[12]]^S5[z[13]]^S6[z[ 3]]^S7[z[ 2]]^S6[z[ 9]];
113*0Sstevel@tonic-gate K[ 3]= S4[z[14]]^S5[z[15]]^S6[z[ 1]]^S7[z[ 0]]^S7[z[12]];
114*0Sstevel@tonic-gate
115*0Sstevel@tonic-gate l=Z[2]^S4[z[ 5]]^S5[z[ 7]]^S6[z[ 4]]^S7[z[ 6]]^S6[z[ 0]];
116*0Sstevel@tonic-gate CAST_exp(l,X,x, 0);
117*0Sstevel@tonic-gate l=Z[0]^S4[x[ 0]]^S5[x[ 2]]^S6[x[ 1]]^S7[x[ 3]]^S7[z[ 2]];
118*0Sstevel@tonic-gate CAST_exp(l,X,x, 4);
119*0Sstevel@tonic-gate l=Z[1]^S4[x[ 7]]^S5[x[ 6]]^S6[x[ 5]]^S7[x[ 4]]^S4[z[ 1]];
120*0Sstevel@tonic-gate CAST_exp(l,X,x, 8);
121*0Sstevel@tonic-gate l=Z[3]^S4[x[10]]^S5[x[ 9]]^S6[x[11]]^S7[x[ 8]]^S5[z[ 3]];
122*0Sstevel@tonic-gate CAST_exp(l,X,x,12);
123*0Sstevel@tonic-gate
124*0Sstevel@tonic-gate K[ 4]= S4[x[ 3]]^S5[x[ 2]]^S6[x[12]]^S7[x[13]]^S4[x[ 8]];
125*0Sstevel@tonic-gate K[ 5]= S4[x[ 1]]^S5[x[ 0]]^S6[x[14]]^S7[x[15]]^S5[x[13]];
126*0Sstevel@tonic-gate K[ 6]= S4[x[ 7]]^S5[x[ 6]]^S6[x[ 8]]^S7[x[ 9]]^S6[x[ 3]];
127*0Sstevel@tonic-gate K[ 7]= S4[x[ 5]]^S5[x[ 4]]^S6[x[10]]^S7[x[11]]^S7[x[ 7]];
128*0Sstevel@tonic-gate
129*0Sstevel@tonic-gate l=X[0]^S4[x[13]]^S5[x[15]]^S6[x[12]]^S7[x[14]]^S6[x[ 8]];
130*0Sstevel@tonic-gate CAST_exp(l,Z,z, 0);
131*0Sstevel@tonic-gate l=X[2]^S4[z[ 0]]^S5[z[ 2]]^S6[z[ 1]]^S7[z[ 3]]^S7[x[10]];
132*0Sstevel@tonic-gate CAST_exp(l,Z,z, 4);
133*0Sstevel@tonic-gate l=X[3]^S4[z[ 7]]^S5[z[ 6]]^S6[z[ 5]]^S7[z[ 4]]^S4[x[ 9]];
134*0Sstevel@tonic-gate CAST_exp(l,Z,z, 8);
135*0Sstevel@tonic-gate l=X[1]^S4[z[10]]^S5[z[ 9]]^S6[z[11]]^S7[z[ 8]]^S5[x[11]];
136*0Sstevel@tonic-gate CAST_exp(l,Z,z,12);
137*0Sstevel@tonic-gate
138*0Sstevel@tonic-gate K[ 8]= S4[z[ 3]]^S5[z[ 2]]^S6[z[12]]^S7[z[13]]^S4[z[ 9]];
139*0Sstevel@tonic-gate K[ 9]= S4[z[ 1]]^S5[z[ 0]]^S6[z[14]]^S7[z[15]]^S5[z[12]];
140*0Sstevel@tonic-gate K[10]= S4[z[ 7]]^S5[z[ 6]]^S6[z[ 8]]^S7[z[ 9]]^S6[z[ 2]];
141*0Sstevel@tonic-gate K[11]= S4[z[ 5]]^S5[z[ 4]]^S6[z[10]]^S7[z[11]]^S7[z[ 6]];
142*0Sstevel@tonic-gate
143*0Sstevel@tonic-gate l=Z[2]^S4[z[ 5]]^S5[z[ 7]]^S6[z[ 4]]^S7[z[ 6]]^S6[z[ 0]];
144*0Sstevel@tonic-gate CAST_exp(l,X,x, 0);
145*0Sstevel@tonic-gate l=Z[0]^S4[x[ 0]]^S5[x[ 2]]^S6[x[ 1]]^S7[x[ 3]]^S7[z[ 2]];
146*0Sstevel@tonic-gate CAST_exp(l,X,x, 4);
147*0Sstevel@tonic-gate l=Z[1]^S4[x[ 7]]^S5[x[ 6]]^S6[x[ 5]]^S7[x[ 4]]^S4[z[ 1]];
148*0Sstevel@tonic-gate CAST_exp(l,X,x, 8);
149*0Sstevel@tonic-gate l=Z[3]^S4[x[10]]^S5[x[ 9]]^S6[x[11]]^S7[x[ 8]]^S5[z[ 3]];
150*0Sstevel@tonic-gate CAST_exp(l,X,x,12);
151*0Sstevel@tonic-gate
152*0Sstevel@tonic-gate K[12]= S4[x[ 8]]^S5[x[ 9]]^S6[x[ 7]]^S7[x[ 6]]^S4[x[ 3]];
153*0Sstevel@tonic-gate K[13]= S4[x[10]]^S5[x[11]]^S6[x[ 5]]^S7[x[ 4]]^S5[x[ 7]];
154*0Sstevel@tonic-gate K[14]= S4[x[12]]^S5[x[13]]^S6[x[ 3]]^S7[x[ 2]]^S6[x[ 8]];
155*0Sstevel@tonic-gate K[15]= S4[x[14]]^S5[x[15]]^S6[x[ 1]]^S7[x[ 0]]^S7[x[13]];
156*0Sstevel@tonic-gate if (K != k) break;
157*0Sstevel@tonic-gate K+=16;
158*0Sstevel@tonic-gate }
159*0Sstevel@tonic-gate
160*0Sstevel@tonic-gate for (i=0; i<16; i++)
161*0Sstevel@tonic-gate {
162*0Sstevel@tonic-gate key->data[i*2]=k[i];
163*0Sstevel@tonic-gate key->data[i*2+1]=((k[i+16])+16)&0x1f;
164*0Sstevel@tonic-gate }
165*0Sstevel@tonic-gate }
166*0Sstevel@tonic-gate
167