1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
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.
7 *
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).
14 *
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.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
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)"
39 *
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
50 * SUCH DAMAGE.
51 *
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.]
56 */
57
58 #include <sys/cdefs.h>
59 __KERNEL_RCSID(0, "$NetBSD: des_cbc.c,v 1.8 2005/12/11 12:20:52 christos Exp $");
60
61 #include <sys/types.h>
62
63 #include <crypto/des/des_locl.h>
64
des_ncbc_encrypt(const unsigned char * in,unsigned char * out,long length,des_key_schedule schedule,des_cblock * ivec,int enc)65 void des_ncbc_encrypt(const unsigned char *in, unsigned char *out, long length,
66 des_key_schedule schedule, des_cblock *ivec, int enc)
67 {
68 register DES_LONG tin0,tin1;
69 register DES_LONG tout0,tout1,xor0,xor1;
70 register long l=length;
71 DES_LONG tin[2];
72 unsigned char *iv;
73
74 iv = &(*ivec)[0];
75
76 if (enc)
77 {
78 c2l(iv,tout0);
79 c2l(iv,tout1);
80 for (l-=8; l>=0; l-=8)
81 {
82 c2l(in,tin0);
83 c2l(in,tin1);
84 tin0^=tout0; tin[0]=tin0;
85 tin1^=tout1; tin[1]=tin1;
86 des_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT);
87 tout0=tin[0]; l2c(tout0,out);
88 tout1=tin[1]; l2c(tout1,out);
89 }
90 if (l != -8)
91 {
92 c2ln(in,tin0,tin1,l+8);
93 tin0^=tout0; tin[0]=tin0;
94 tin1^=tout1; tin[1]=tin1;
95 des_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT);
96 tout0=tin[0]; l2c(tout0,out);
97 tout1=tin[1]; l2c(tout1,out);
98 }
99 iv = &(*ivec)[0];
100 l2c(tout0,iv);
101 l2c(tout1,iv);
102 }
103 else
104 {
105 c2l(iv,xor0);
106 c2l(iv,xor1);
107 for (l-=8; l>=0; l-=8)
108 {
109 c2l(in,tin0); tin[0]=tin0;
110 c2l(in,tin1); tin[1]=tin1;
111 des_encrypt1((DES_LONG *)tin,schedule,DES_DECRYPT);
112 tout0=tin[0]^xor0;
113 tout1=tin[1]^xor1;
114 l2c(tout0,out);
115 l2c(tout1,out);
116 xor0=tin0;
117 xor1=tin1;
118 }
119 if (l != -8)
120 {
121 c2l(in,tin0); tin[0]=tin0;
122 c2l(in,tin1); tin[1]=tin1;
123 des_encrypt1((DES_LONG *)tin,schedule,DES_DECRYPT);
124 tout0=tin[0]^xor0;
125 tout1=tin[1]^xor1;
126 l2cn(tout0,tout1,out,l+8);
127 xor0=tin0;
128 xor1=tin1;
129 }
130 iv = &(*ivec)[0];
131 l2c(xor0,iv);
132 l2c(xor1,iv);
133 }
134 tin0=tin1=tout0=tout1=xor0=xor1=0;
135 tin[0]=tin[1]=0;
136 }
137
des_ede3_cbc_encrypt(const unsigned char * input,unsigned char * output,long length,des_key_schedule ks1,des_key_schedule ks2,des_key_schedule ks3,des_cblock * ivec,int enc)138 void des_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
139 long length, des_key_schedule ks1, des_key_schedule ks2,
140 des_key_schedule ks3, des_cblock *ivec, int enc)
141 {
142 register DES_LONG tin0,tin1;
143 register DES_LONG tout0,tout1,xor0,xor1;
144 register const unsigned char *in;
145 unsigned char *out;
146 register long l=length;
147 DES_LONG tin[2];
148 unsigned char *iv;
149
150 in=input;
151 out=output;
152 iv = &(*ivec)[0];
153
154 if (enc)
155 {
156 c2l(iv,tout0);
157 c2l(iv,tout1);
158 for (l-=8; l>=0; l-=8)
159 {
160 c2l(in,tin0);
161 c2l(in,tin1);
162 tin0^=tout0;
163 tin1^=tout1;
164
165 tin[0]=tin0;
166 tin[1]=tin1;
167 des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
168 tout0=tin[0];
169 tout1=tin[1];
170
171 l2c(tout0,out);
172 l2c(tout1,out);
173 }
174 if (l != -8)
175 {
176 c2ln(in,tin0,tin1,l+8);
177 tin0^=tout0;
178 tin1^=tout1;
179
180 tin[0]=tin0;
181 tin[1]=tin1;
182 des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
183 tout0=tin[0];
184 tout1=tin[1];
185
186 l2c(tout0,out);
187 l2c(tout1,out);
188 }
189 iv = &(*ivec)[0];
190 l2c(tout0,iv);
191 l2c(tout1,iv);
192 }
193 else
194 {
195 register DES_LONG t0,t1;
196
197 c2l(iv,xor0);
198 c2l(iv,xor1);
199 for (l-=8; l>=0; l-=8)
200 {
201 c2l(in,tin0);
202 c2l(in,tin1);
203
204 t0=tin0;
205 t1=tin1;
206
207 tin[0]=tin0;
208 tin[1]=tin1;
209 des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
210 tout0=tin[0];
211 tout1=tin[1];
212
213 tout0^=xor0;
214 tout1^=xor1;
215 l2c(tout0,out);
216 l2c(tout1,out);
217 xor0=t0;
218 xor1=t1;
219 }
220 if (l != -8)
221 {
222 c2l(in,tin0);
223 c2l(in,tin1);
224
225 t0=tin0;
226 t1=tin1;
227
228 tin[0]=tin0;
229 tin[1]=tin1;
230 des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
231 tout0=tin[0];
232 tout1=tin[1];
233
234 tout0^=xor0;
235 tout1^=xor1;
236 l2cn(tout0,tout1,out,l+8);
237 xor0=t0;
238 xor1=t1;
239 }
240
241 iv = &(*ivec)[0];
242 l2c(xor0,iv);
243 l2c(xor1,iv);
244 }
245 tin0=tin1=tout0=tout1=xor0=xor1=0;
246 tin[0]=tin[1]=0;
247 }
248