2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
11 * DES low level APIs are deprecated for public use, but still ok for internal
14 #include "internal/deprecated.h"
16 #include "des_local.h"
20 void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out,
21 long length, DES_key_schedule *schedule,
22 DES_cblock *ivec, const_DES_cblock *inw,
23 const_DES_cblock *outw, int enc)
25 register DES_LONG tin0, tin1;
26 register DES_LONG tout0, tout1, xor0, xor1;
27 register DES_LONG inW0, inW1, outW0, outW1;
28 register const unsigned char *in2;
29 register long l = length;
45 for (l -= 8; l >= 0; l -= 8) {
52 DES_encrypt1(tin, schedule, DES_ENCRYPT);
53 tout0 = tin[0] ^ outW0;
55 tout1 = tin[1] ^ outW1;
59 c2ln(in, tin0, tin1, l + 8);
64 DES_encrypt1(tin, schedule, DES_ENCRYPT);
65 tout0 = tin[0] ^ outW0;
67 tout1 = tin[1] ^ outW1;
76 for (l -= 8; l > 0; l -= 8) {
78 tin[0] = tin0 ^ outW0;
80 tin[1] = tin1 ^ outW1;
81 DES_encrypt1(tin, schedule, DES_DECRYPT);
82 tout0 = tin[0] ^ xor0 ^ inW0;
83 tout1 = tin[1] ^ xor1 ^ inW1;
91 tin[0] = tin0 ^ outW0;
93 tin[1] = tin1 ^ outW1;
94 DES_encrypt1(tin, schedule, DES_DECRYPT);
95 tout0 = tin[0] ^ xor0 ^ inW0;
96 tout1 = tin[1] ^ xor1 ^ inW1;
97 l2cn(tout0, tout1, out, l + 8);
106 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
107 inW0 = inW1 = outW0 = outW1 = 0;