2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
14 * The input and output encrypted as though 64bit cfb mode is being used.
15 * The extra state information to record how much of the 64bit block we have
16 * used is contained in *num;
19 void DES_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out,
20 long length, DES_key_schedule *ks1,
21 DES_key_schedule *ks2, DES_key_schedule *ks3,
22 DES_cblock *ivec, int *num, int enc)
24 register DES_LONG v0, v1;
25 register long l = length;
26 register int n = *num;
28 unsigned char *iv, c, cc;
39 DES_encrypt3(ti, ks1, ks2, ks3);
61 DES_encrypt3(ti, ks1, ks2, ks3);
77 v0 = v1 = ti[0] = ti[1] = c = cc = 0;
82 * This is compatible with the single key CFB-r for DES, even thought that's
86 void DES_ede3_cfb_encrypt(const unsigned char *in, unsigned char *out,
87 int numbits, long length, DES_key_schedule *ks1,
88 DES_key_schedule *ks2, DES_key_schedule *ks3,
89 DES_cblock *ivec, int enc)
91 register DES_LONG d0, d1, v0, v1;
92 register unsigned long l = length, n = ((unsigned int)numbits + 7) / 8;
93 register int num = numbits, i;
96 unsigned char ovec[16];
108 DES_encrypt3(ti, ks1, ks2, ks3);
113 l2cn(d0, d1, out, n);
116 * 30-08-94 - eay - changed because l>>32 and l<<32 are bad under
122 } else if (num == 64) {
131 /* shift ovec left most of the bits... */
132 memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0));
133 /* now the remaining bits */
135 for (i = 0; i < 8; ++i) {
137 ovec[i] |= ovec[i + 1] >> (8 - num % 8);
149 DES_encrypt3(ti, ks1, ks2, ks3);
153 * 30-08-94 - eay - changed because l>>32 and l<<32 are bad under
159 } else if (num == 64) {
168 /* shift ovec left most of the bits... */
169 memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0));
170 /* now the remaining bits */
172 for (i = 0; i < 8; ++i) {
174 ovec[i] |= ovec[i + 1] >> (8 - num % 8);
182 l2cn(d0, d1, out, n);
189 v0 = v1 = d0 = d1 = ti[0] = ti[1] = 0;