1*0Sstevel@tonic-gate /* crypto/cast/c_enc.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
CAST_encrypt(CAST_LONG * data,CAST_KEY * key)62*0Sstevel@tonic-gate void CAST_encrypt(CAST_LONG *data, CAST_KEY *key)
63*0Sstevel@tonic-gate {
64*0Sstevel@tonic-gate register CAST_LONG l,r,*k,t;
65*0Sstevel@tonic-gate
66*0Sstevel@tonic-gate k= &(key->data[0]);
67*0Sstevel@tonic-gate l=data[0];
68*0Sstevel@tonic-gate r=data[1];
69*0Sstevel@tonic-gate
70*0Sstevel@tonic-gate E_CAST( 0,k,l,r,+,^,-);
71*0Sstevel@tonic-gate E_CAST( 1,k,r,l,^,-,+);
72*0Sstevel@tonic-gate E_CAST( 2,k,l,r,-,+,^);
73*0Sstevel@tonic-gate E_CAST( 3,k,r,l,+,^,-);
74*0Sstevel@tonic-gate E_CAST( 4,k,l,r,^,-,+);
75*0Sstevel@tonic-gate E_CAST( 5,k,r,l,-,+,^);
76*0Sstevel@tonic-gate E_CAST( 6,k,l,r,+,^,-);
77*0Sstevel@tonic-gate E_CAST( 7,k,r,l,^,-,+);
78*0Sstevel@tonic-gate E_CAST( 8,k,l,r,-,+,^);
79*0Sstevel@tonic-gate E_CAST( 9,k,r,l,+,^,-);
80*0Sstevel@tonic-gate E_CAST(10,k,l,r,^,-,+);
81*0Sstevel@tonic-gate E_CAST(11,k,r,l,-,+,^);
82*0Sstevel@tonic-gate if(!key->short_key)
83*0Sstevel@tonic-gate {
84*0Sstevel@tonic-gate E_CAST(12,k,l,r,+,^,-);
85*0Sstevel@tonic-gate E_CAST(13,k,r,l,^,-,+);
86*0Sstevel@tonic-gate E_CAST(14,k,l,r,-,+,^);
87*0Sstevel@tonic-gate E_CAST(15,k,r,l,+,^,-);
88*0Sstevel@tonic-gate }
89*0Sstevel@tonic-gate
90*0Sstevel@tonic-gate data[1]=l&0xffffffffL;
91*0Sstevel@tonic-gate data[0]=r&0xffffffffL;
92*0Sstevel@tonic-gate }
93*0Sstevel@tonic-gate
CAST_decrypt(CAST_LONG * data,CAST_KEY * key)94*0Sstevel@tonic-gate void CAST_decrypt(CAST_LONG *data, CAST_KEY *key)
95*0Sstevel@tonic-gate {
96*0Sstevel@tonic-gate register CAST_LONG l,r,*k,t;
97*0Sstevel@tonic-gate
98*0Sstevel@tonic-gate k= &(key->data[0]);
99*0Sstevel@tonic-gate l=data[0];
100*0Sstevel@tonic-gate r=data[1];
101*0Sstevel@tonic-gate
102*0Sstevel@tonic-gate if(!key->short_key)
103*0Sstevel@tonic-gate {
104*0Sstevel@tonic-gate E_CAST(15,k,l,r,+,^,-);
105*0Sstevel@tonic-gate E_CAST(14,k,r,l,-,+,^);
106*0Sstevel@tonic-gate E_CAST(13,k,l,r,^,-,+);
107*0Sstevel@tonic-gate E_CAST(12,k,r,l,+,^,-);
108*0Sstevel@tonic-gate }
109*0Sstevel@tonic-gate E_CAST(11,k,l,r,-,+,^);
110*0Sstevel@tonic-gate E_CAST(10,k,r,l,^,-,+);
111*0Sstevel@tonic-gate E_CAST( 9,k,l,r,+,^,-);
112*0Sstevel@tonic-gate E_CAST( 8,k,r,l,-,+,^);
113*0Sstevel@tonic-gate E_CAST( 7,k,l,r,^,-,+);
114*0Sstevel@tonic-gate E_CAST( 6,k,r,l,+,^,-);
115*0Sstevel@tonic-gate E_CAST( 5,k,l,r,-,+,^);
116*0Sstevel@tonic-gate E_CAST( 4,k,r,l,^,-,+);
117*0Sstevel@tonic-gate E_CAST( 3,k,l,r,+,^,-);
118*0Sstevel@tonic-gate E_CAST( 2,k,r,l,-,+,^);
119*0Sstevel@tonic-gate E_CAST( 1,k,l,r,^,-,+);
120*0Sstevel@tonic-gate E_CAST( 0,k,r,l,+,^,-);
121*0Sstevel@tonic-gate
122*0Sstevel@tonic-gate data[1]=l&0xffffffffL;
123*0Sstevel@tonic-gate data[0]=r&0xffffffffL;
124*0Sstevel@tonic-gate }
125*0Sstevel@tonic-gate
CAST_cbc_encrypt(const unsigned char * in,unsigned char * out,long length,CAST_KEY * ks,unsigned char * iv,int enc)126*0Sstevel@tonic-gate void CAST_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
127*0Sstevel@tonic-gate CAST_KEY *ks, unsigned char *iv, int enc)
128*0Sstevel@tonic-gate {
129*0Sstevel@tonic-gate register CAST_LONG tin0,tin1;
130*0Sstevel@tonic-gate register CAST_LONG tout0,tout1,xor0,xor1;
131*0Sstevel@tonic-gate register long l=length;
132*0Sstevel@tonic-gate CAST_LONG tin[2];
133*0Sstevel@tonic-gate
134*0Sstevel@tonic-gate if (enc)
135*0Sstevel@tonic-gate {
136*0Sstevel@tonic-gate n2l(iv,tout0);
137*0Sstevel@tonic-gate n2l(iv,tout1);
138*0Sstevel@tonic-gate iv-=8;
139*0Sstevel@tonic-gate for (l-=8; l>=0; l-=8)
140*0Sstevel@tonic-gate {
141*0Sstevel@tonic-gate n2l(in,tin0);
142*0Sstevel@tonic-gate n2l(in,tin1);
143*0Sstevel@tonic-gate tin0^=tout0;
144*0Sstevel@tonic-gate tin1^=tout1;
145*0Sstevel@tonic-gate tin[0]=tin0;
146*0Sstevel@tonic-gate tin[1]=tin1;
147*0Sstevel@tonic-gate CAST_encrypt(tin,ks);
148*0Sstevel@tonic-gate tout0=tin[0];
149*0Sstevel@tonic-gate tout1=tin[1];
150*0Sstevel@tonic-gate l2n(tout0,out);
151*0Sstevel@tonic-gate l2n(tout1,out);
152*0Sstevel@tonic-gate }
153*0Sstevel@tonic-gate if (l != -8)
154*0Sstevel@tonic-gate {
155*0Sstevel@tonic-gate n2ln(in,tin0,tin1,l+8);
156*0Sstevel@tonic-gate tin0^=tout0;
157*0Sstevel@tonic-gate tin1^=tout1;
158*0Sstevel@tonic-gate tin[0]=tin0;
159*0Sstevel@tonic-gate tin[1]=tin1;
160*0Sstevel@tonic-gate CAST_encrypt(tin,ks);
161*0Sstevel@tonic-gate tout0=tin[0];
162*0Sstevel@tonic-gate tout1=tin[1];
163*0Sstevel@tonic-gate l2n(tout0,out);
164*0Sstevel@tonic-gate l2n(tout1,out);
165*0Sstevel@tonic-gate }
166*0Sstevel@tonic-gate l2n(tout0,iv);
167*0Sstevel@tonic-gate l2n(tout1,iv);
168*0Sstevel@tonic-gate }
169*0Sstevel@tonic-gate else
170*0Sstevel@tonic-gate {
171*0Sstevel@tonic-gate n2l(iv,xor0);
172*0Sstevel@tonic-gate n2l(iv,xor1);
173*0Sstevel@tonic-gate iv-=8;
174*0Sstevel@tonic-gate for (l-=8; l>=0; l-=8)
175*0Sstevel@tonic-gate {
176*0Sstevel@tonic-gate n2l(in,tin0);
177*0Sstevel@tonic-gate n2l(in,tin1);
178*0Sstevel@tonic-gate tin[0]=tin0;
179*0Sstevel@tonic-gate tin[1]=tin1;
180*0Sstevel@tonic-gate CAST_decrypt(tin,ks);
181*0Sstevel@tonic-gate tout0=tin[0]^xor0;
182*0Sstevel@tonic-gate tout1=tin[1]^xor1;
183*0Sstevel@tonic-gate l2n(tout0,out);
184*0Sstevel@tonic-gate l2n(tout1,out);
185*0Sstevel@tonic-gate xor0=tin0;
186*0Sstevel@tonic-gate xor1=tin1;
187*0Sstevel@tonic-gate }
188*0Sstevel@tonic-gate if (l != -8)
189*0Sstevel@tonic-gate {
190*0Sstevel@tonic-gate n2l(in,tin0);
191*0Sstevel@tonic-gate n2l(in,tin1);
192*0Sstevel@tonic-gate tin[0]=tin0;
193*0Sstevel@tonic-gate tin[1]=tin1;
194*0Sstevel@tonic-gate CAST_decrypt(tin,ks);
195*0Sstevel@tonic-gate tout0=tin[0]^xor0;
196*0Sstevel@tonic-gate tout1=tin[1]^xor1;
197*0Sstevel@tonic-gate l2nn(tout0,tout1,out,l+8);
198*0Sstevel@tonic-gate xor0=tin0;
199*0Sstevel@tonic-gate xor1=tin1;
200*0Sstevel@tonic-gate }
201*0Sstevel@tonic-gate l2n(xor0,iv);
202*0Sstevel@tonic-gate l2n(xor1,iv);
203*0Sstevel@tonic-gate }
204*0Sstevel@tonic-gate tin0=tin1=tout0=tout1=xor0=xor1=0;
205*0Sstevel@tonic-gate tin[0]=tin[1]=0;
206*0Sstevel@tonic-gate }
207*0Sstevel@tonic-gate
208