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 void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out,
15 long length, DES_key_schedule *schedule,
16 DES_cblock *ivec, const_DES_cblock *inw,
17 const_DES_cblock *outw, int enc)
19 register DES_LONG tin0, tin1;
20 register DES_LONG tout0, tout1, xor0, xor1;
21 register DES_LONG inW0, inW1, outW0, outW1;
22 register const unsigned char *in2;
23 register long l = length;
39 for (l -= 8; l >= 0; l -= 8) {
46 DES_encrypt1(tin, schedule, DES_ENCRYPT);
47 tout0 = tin[0] ^ outW0;
49 tout1 = tin[1] ^ outW1;
53 c2ln(in, tin0, tin1, l + 8);
58 DES_encrypt1(tin, schedule, DES_ENCRYPT);
59 tout0 = tin[0] ^ outW0;
61 tout1 = tin[1] ^ outW1;
70 for (l -= 8; l > 0; l -= 8) {
72 tin[0] = tin0 ^ outW0;
74 tin[1] = tin1 ^ outW1;
75 DES_encrypt1(tin, schedule, DES_DECRYPT);
76 tout0 = tin[0] ^ xor0 ^ inW0;
77 tout1 = tin[1] ^ xor1 ^ inW1;
85 tin[0] = tin0 ^ outW0;
87 tin[1] = tin1 ^ outW1;
88 DES_encrypt1(tin, schedule, DES_DECRYPT);
89 tout0 = tin[0] ^ xor0 ^ inW0;
90 tout1 = tin[1] ^ xor1 ^ inW1;
91 l2cn(tout0, tout1, out, l + 8);
100 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
101 inW0 = inW1 = outW0 = outW1 = 0;