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 #include <string.h>
58
59 #include <openssl/des.h>
60
61 #include "../../crypto/fipsmodule/des/internal.h"
62 #include "../../crypto/internal.h"
63
64
65 // The input and output encrypted as though 64bit cfb mode is being used. The
66 // extra state information to record how much of the 64bit block we have used
67 // is contained in *num;
DES_ede3_cfb64_encrypt(const uint8_t * in,uint8_t * out,long length,DES_key_schedule * ks1,DES_key_schedule * ks2,DES_key_schedule * ks3,DES_cblock * ivec,int * num,int enc)68 void DES_ede3_cfb64_encrypt(const uint8_t *in, uint8_t *out,
69 long length, DES_key_schedule *ks1,
70 DES_key_schedule *ks2, DES_key_schedule *ks3,
71 DES_cblock *ivec, int *num, int enc) {
72 uint32_t v0, v1;
73 long l = length;
74 int n = *num;
75 uint32_t ti[2];
76 uint8_t *iv, c, cc;
77
78 iv = ivec->bytes;
79 if (enc) {
80 while (l--) {
81 if (n == 0) {
82 c2l(iv, v0);
83 c2l(iv, v1);
84
85 ti[0] = v0;
86 ti[1] = v1;
87 DES_encrypt3(ti, ks1, ks2, ks3);
88 v0 = ti[0];
89 v1 = ti[1];
90
91 iv = ivec->bytes;
92 l2c(v0, iv);
93 l2c(v1, iv);
94 iv = ivec->bytes;
95 }
96 c = *(in++) ^ iv[n];
97 *(out++) = c;
98 iv[n] = c;
99 n = (n + 1) & 0x07;
100 }
101 } else {
102 while (l--) {
103 if (n == 0) {
104 c2l(iv, v0);
105 c2l(iv, v1);
106
107 ti[0] = v0;
108 ti[1] = v1;
109 DES_encrypt3(ti, ks1, ks2, ks3);
110 v0 = ti[0];
111 v1 = ti[1];
112
113 iv = ivec->bytes;
114 l2c(v0, iv);
115 l2c(v1, iv);
116 iv = ivec->bytes;
117 }
118 cc = *(in++);
119 c = iv[n];
120 iv[n] = cc;
121 *(out++) = c ^ cc;
122 n = (n + 1) & 0x07;
123 }
124 }
125 v0 = v1 = ti[0] = ti[1] = c = cc = 0;
126 *num = n;
127 }
128
129 // This is compatible with the single key CFB-r for DES, even thought that's
130 // not what EVP needs.
131
DES_ede3_cfb_encrypt(const uint8_t * in,uint8_t * out,int numbits,long length,DES_key_schedule * ks1,DES_key_schedule * ks2,DES_key_schedule * ks3,DES_cblock * ivec,int enc)132 void DES_ede3_cfb_encrypt(const uint8_t *in, uint8_t *out, int numbits,
133 long length, DES_key_schedule *ks1,
134 DES_key_schedule *ks2, DES_key_schedule *ks3,
135 DES_cblock *ivec, int enc) {
136 uint32_t d0, d1, v0, v1;
137 unsigned long l = length, n = ((unsigned int)numbits + 7) / 8;
138 int num = numbits, i;
139 uint32_t ti[2];
140 uint8_t *iv;
141 uint8_t ovec[16];
142
143 if (num > 64) {
144 return;
145 };
146
147 iv = ivec->bytes;
148 c2l(iv, v0);
149 c2l(iv, v1);
150
151 if (enc) {
152 while (l >= n) {
153 l -= n;
154 ti[0] = v0;
155 ti[1] = v1;
156 DES_encrypt3(ti, ks1, ks2, ks3);
157 c2ln(in, d0, d1, n);
158 in += n;
159 d0 ^= ti[0];
160 d1 ^= ti[1];
161 l2cn(d0, d1, out, n);
162 out += n;
163 // 30-08-94 - eay - changed because l>>32 and l<<32 are bad under
164 // gcc :-(
165 if (num == 32) {
166 v0 = v1;
167 v1 = d0;
168 } else if (num == 64) {
169 v0 = d0;
170 v1 = d1;
171 } else {
172 iv = &ovec[0];
173 l2c(v0, iv);
174 l2c(v1, iv);
175 l2c(d0, iv);
176 l2c(d1, iv);
177 // shift ovec left most of the bits...
178 OPENSSL_memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0));
179 // now the remaining bits
180 if (num % 8 != 0) {
181 for (i = 0; i < 8; ++i) {
182 ovec[i] <<= num % 8;
183 ovec[i] |= ovec[i + 1] >> (8 - num % 8);
184 }
185 }
186 iv = &ovec[0];
187 c2l(iv, v0);
188 c2l(iv, v1);
189 }
190 }
191 } else {
192 while (l >= n) {
193 l -= n;
194 ti[0] = v0;
195 ti[1] = v1;
196 DES_encrypt3(ti, ks1, ks2, ks3);
197 c2ln(in, d0, d1, n);
198 in += n;
199 // 30-08-94 - eay - changed because l>>32 and l<<32 are bad under
200 // gcc :-(
201 if (num == 32) {
202 v0 = v1;
203 v1 = d0;
204 } else if (num == 64) {
205 v0 = d0;
206 v1 = d1;
207 } else {
208 iv = &ovec[0];
209 l2c(v0, iv);
210 l2c(v1, iv);
211 l2c(d0, iv);
212 l2c(d1, iv);
213 // shift ovec left most of the bits...
214 OPENSSL_memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0));
215 // now the remaining bits
216 if (num % 8 != 0) {
217 for (i = 0; i < 8; ++i) {
218 ovec[i] <<= num % 8;
219 ovec[i] |= ovec[i + 1] >> (8 - num % 8);
220 }
221 }
222 iv = &ovec[0];
223 c2l(iv, v0);
224 c2l(iv, v1);
225 }
226 d0 ^= ti[0];
227 d1 ^= ti[1];
228 l2cn(d0, d1, out, n);
229 out += n;
230 }
231 }
232
233 iv = ivec->bytes;
234 l2c(v0, iv);
235 l2c(v1, iv);
236 v0 = v1 = d0 = d1 = ti[0] = ti[1] = 0;
237 }
238