1*0Sstevel@tonic-gate /* crypto/rc2/rc2_cbc.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/rc2.h>
60*0Sstevel@tonic-gate #include "rc2_locl.h"
61*0Sstevel@tonic-gate
RC2_cbc_encrypt(const unsigned char * in,unsigned char * out,long length,RC2_KEY * ks,unsigned char * iv,int encrypt)62*0Sstevel@tonic-gate void RC2_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
63*0Sstevel@tonic-gate RC2_KEY *ks, unsigned char *iv, int encrypt)
64*0Sstevel@tonic-gate {
65*0Sstevel@tonic-gate register unsigned long tin0,tin1;
66*0Sstevel@tonic-gate register unsigned long tout0,tout1,xor0,xor1;
67*0Sstevel@tonic-gate register long l=length;
68*0Sstevel@tonic-gate unsigned long tin[2];
69*0Sstevel@tonic-gate
70*0Sstevel@tonic-gate if (encrypt)
71*0Sstevel@tonic-gate {
72*0Sstevel@tonic-gate c2l(iv,tout0);
73*0Sstevel@tonic-gate c2l(iv,tout1);
74*0Sstevel@tonic-gate iv-=8;
75*0Sstevel@tonic-gate for (l-=8; l>=0; l-=8)
76*0Sstevel@tonic-gate {
77*0Sstevel@tonic-gate c2l(in,tin0);
78*0Sstevel@tonic-gate c2l(in,tin1);
79*0Sstevel@tonic-gate tin0^=tout0;
80*0Sstevel@tonic-gate tin1^=tout1;
81*0Sstevel@tonic-gate tin[0]=tin0;
82*0Sstevel@tonic-gate tin[1]=tin1;
83*0Sstevel@tonic-gate RC2_encrypt(tin,ks);
84*0Sstevel@tonic-gate tout0=tin[0]; l2c(tout0,out);
85*0Sstevel@tonic-gate tout1=tin[1]; l2c(tout1,out);
86*0Sstevel@tonic-gate }
87*0Sstevel@tonic-gate if (l != -8)
88*0Sstevel@tonic-gate {
89*0Sstevel@tonic-gate c2ln(in,tin0,tin1,l+8);
90*0Sstevel@tonic-gate tin0^=tout0;
91*0Sstevel@tonic-gate tin1^=tout1;
92*0Sstevel@tonic-gate tin[0]=tin0;
93*0Sstevel@tonic-gate tin[1]=tin1;
94*0Sstevel@tonic-gate RC2_encrypt(tin,ks);
95*0Sstevel@tonic-gate tout0=tin[0]; l2c(tout0,out);
96*0Sstevel@tonic-gate tout1=tin[1]; l2c(tout1,out);
97*0Sstevel@tonic-gate }
98*0Sstevel@tonic-gate l2c(tout0,iv);
99*0Sstevel@tonic-gate l2c(tout1,iv);
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate else
102*0Sstevel@tonic-gate {
103*0Sstevel@tonic-gate c2l(iv,xor0);
104*0Sstevel@tonic-gate c2l(iv,xor1);
105*0Sstevel@tonic-gate iv-=8;
106*0Sstevel@tonic-gate for (l-=8; l>=0; l-=8)
107*0Sstevel@tonic-gate {
108*0Sstevel@tonic-gate c2l(in,tin0); tin[0]=tin0;
109*0Sstevel@tonic-gate c2l(in,tin1); tin[1]=tin1;
110*0Sstevel@tonic-gate RC2_decrypt(tin,ks);
111*0Sstevel@tonic-gate tout0=tin[0]^xor0;
112*0Sstevel@tonic-gate tout1=tin[1]^xor1;
113*0Sstevel@tonic-gate l2c(tout0,out);
114*0Sstevel@tonic-gate l2c(tout1,out);
115*0Sstevel@tonic-gate xor0=tin0;
116*0Sstevel@tonic-gate xor1=tin1;
117*0Sstevel@tonic-gate }
118*0Sstevel@tonic-gate if (l != -8)
119*0Sstevel@tonic-gate {
120*0Sstevel@tonic-gate c2l(in,tin0); tin[0]=tin0;
121*0Sstevel@tonic-gate c2l(in,tin1); tin[1]=tin1;
122*0Sstevel@tonic-gate RC2_decrypt(tin,ks);
123*0Sstevel@tonic-gate tout0=tin[0]^xor0;
124*0Sstevel@tonic-gate tout1=tin[1]^xor1;
125*0Sstevel@tonic-gate l2cn(tout0,tout1,out,l+8);
126*0Sstevel@tonic-gate xor0=tin0;
127*0Sstevel@tonic-gate xor1=tin1;
128*0Sstevel@tonic-gate }
129*0Sstevel@tonic-gate l2c(xor0,iv);
130*0Sstevel@tonic-gate l2c(xor1,iv);
131*0Sstevel@tonic-gate }
132*0Sstevel@tonic-gate tin0=tin1=tout0=tout1=xor0=xor1=0;
133*0Sstevel@tonic-gate tin[0]=tin[1]=0;
134*0Sstevel@tonic-gate }
135*0Sstevel@tonic-gate
RC2_encrypt(unsigned long * d,RC2_KEY * key)136*0Sstevel@tonic-gate void RC2_encrypt(unsigned long *d, RC2_KEY *key)
137*0Sstevel@tonic-gate {
138*0Sstevel@tonic-gate int i,n;
139*0Sstevel@tonic-gate register RC2_INT *p0,*p1;
140*0Sstevel@tonic-gate register RC2_INT x0,x1,x2,x3,t;
141*0Sstevel@tonic-gate unsigned long l;
142*0Sstevel@tonic-gate
143*0Sstevel@tonic-gate l=d[0];
144*0Sstevel@tonic-gate x0=(RC2_INT)l&0xffff;
145*0Sstevel@tonic-gate x1=(RC2_INT)(l>>16L);
146*0Sstevel@tonic-gate l=d[1];
147*0Sstevel@tonic-gate x2=(RC2_INT)l&0xffff;
148*0Sstevel@tonic-gate x3=(RC2_INT)(l>>16L);
149*0Sstevel@tonic-gate
150*0Sstevel@tonic-gate n=3;
151*0Sstevel@tonic-gate i=5;
152*0Sstevel@tonic-gate
153*0Sstevel@tonic-gate p0=p1= &(key->data[0]);
154*0Sstevel@tonic-gate for (;;)
155*0Sstevel@tonic-gate {
156*0Sstevel@tonic-gate t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff;
157*0Sstevel@tonic-gate x0=(t<<1)|(t>>15);
158*0Sstevel@tonic-gate t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff;
159*0Sstevel@tonic-gate x1=(t<<2)|(t>>14);
160*0Sstevel@tonic-gate t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff;
161*0Sstevel@tonic-gate x2=(t<<3)|(t>>13);
162*0Sstevel@tonic-gate t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff;
163*0Sstevel@tonic-gate x3=(t<<5)|(t>>11);
164*0Sstevel@tonic-gate
165*0Sstevel@tonic-gate if (--i == 0)
166*0Sstevel@tonic-gate {
167*0Sstevel@tonic-gate if (--n == 0) break;
168*0Sstevel@tonic-gate i=(n == 2)?6:5;
169*0Sstevel@tonic-gate
170*0Sstevel@tonic-gate x0+=p1[x3&0x3f];
171*0Sstevel@tonic-gate x1+=p1[x0&0x3f];
172*0Sstevel@tonic-gate x2+=p1[x1&0x3f];
173*0Sstevel@tonic-gate x3+=p1[x2&0x3f];
174*0Sstevel@tonic-gate }
175*0Sstevel@tonic-gate }
176*0Sstevel@tonic-gate
177*0Sstevel@tonic-gate d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L);
178*0Sstevel@tonic-gate d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L);
179*0Sstevel@tonic-gate }
180*0Sstevel@tonic-gate
RC2_decrypt(unsigned long * d,RC2_KEY * key)181*0Sstevel@tonic-gate void RC2_decrypt(unsigned long *d, RC2_KEY *key)
182*0Sstevel@tonic-gate {
183*0Sstevel@tonic-gate int i,n;
184*0Sstevel@tonic-gate register RC2_INT *p0,*p1;
185*0Sstevel@tonic-gate register RC2_INT x0,x1,x2,x3,t;
186*0Sstevel@tonic-gate unsigned long l;
187*0Sstevel@tonic-gate
188*0Sstevel@tonic-gate l=d[0];
189*0Sstevel@tonic-gate x0=(RC2_INT)l&0xffff;
190*0Sstevel@tonic-gate x1=(RC2_INT)(l>>16L);
191*0Sstevel@tonic-gate l=d[1];
192*0Sstevel@tonic-gate x2=(RC2_INT)l&0xffff;
193*0Sstevel@tonic-gate x3=(RC2_INT)(l>>16L);
194*0Sstevel@tonic-gate
195*0Sstevel@tonic-gate n=3;
196*0Sstevel@tonic-gate i=5;
197*0Sstevel@tonic-gate
198*0Sstevel@tonic-gate p0= &(key->data[63]);
199*0Sstevel@tonic-gate p1= &(key->data[0]);
200*0Sstevel@tonic-gate for (;;)
201*0Sstevel@tonic-gate {
202*0Sstevel@tonic-gate t=((x3<<11)|(x3>>5))&0xffff;
203*0Sstevel@tonic-gate x3=(t-(x0& ~x2)-(x1&x2)- *(p0--))&0xffff;
204*0Sstevel@tonic-gate t=((x2<<13)|(x2>>3))&0xffff;
205*0Sstevel@tonic-gate x2=(t-(x3& ~x1)-(x0&x1)- *(p0--))&0xffff;
206*0Sstevel@tonic-gate t=((x1<<14)|(x1>>2))&0xffff;
207*0Sstevel@tonic-gate x1=(t-(x2& ~x0)-(x3&x0)- *(p0--))&0xffff;
208*0Sstevel@tonic-gate t=((x0<<15)|(x0>>1))&0xffff;
209*0Sstevel@tonic-gate x0=(t-(x1& ~x3)-(x2&x3)- *(p0--))&0xffff;
210*0Sstevel@tonic-gate
211*0Sstevel@tonic-gate if (--i == 0)
212*0Sstevel@tonic-gate {
213*0Sstevel@tonic-gate if (--n == 0) break;
214*0Sstevel@tonic-gate i=(n == 2)?6:5;
215*0Sstevel@tonic-gate
216*0Sstevel@tonic-gate x3=(x3-p1[x2&0x3f])&0xffff;
217*0Sstevel@tonic-gate x2=(x2-p1[x1&0x3f])&0xffff;
218*0Sstevel@tonic-gate x1=(x1-p1[x0&0x3f])&0xffff;
219*0Sstevel@tonic-gate x0=(x0-p1[x3&0x3f])&0xffff;
220*0Sstevel@tonic-gate }
221*0Sstevel@tonic-gate }
222*0Sstevel@tonic-gate
223*0Sstevel@tonic-gate d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L);
224*0Sstevel@tonic-gate d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L);
225*0Sstevel@tonic-gate }
226*0Sstevel@tonic-gate
227