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 | |
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 | |
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 | |