2 * Copyright 1995-2020 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 * CAST low level APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
16 #include <openssl/cast.h>
17 #include "cast_local.h"
19 void CAST_encrypt(CAST_LONG *data, const CAST_KEY *key)
28 E_CAST(0, k, l, r, +, ^, -);
29 E_CAST(1, k, r, l, ^, -, +);
30 E_CAST(2, k, l, r, -, +, ^);
31 E_CAST(3, k, r, l, +, ^, -);
32 E_CAST(4, k, l, r, ^, -, +);
33 E_CAST(5, k, r, l, -, +, ^);
34 E_CAST(6, k, l, r, +, ^, -);
35 E_CAST(7, k, r, l, ^, -, +);
36 E_CAST(8, k, l, r, -, +, ^);
37 E_CAST(9, k, r, l, +, ^, -);
38 E_CAST(10, k, l, r, ^, -, +);
39 E_CAST(11, k, r, l, -, +, ^);
40 if (!key->short_key) {
41 E_CAST(12, k, l, r, +, ^, -);
42 E_CAST(13, k, r, l, ^, -, +);
43 E_CAST(14, k, l, r, -, +, ^);
44 E_CAST(15, k, r, l, +, ^, -);
47 data[1] = l & 0xffffffffL;
48 data[0] = r & 0xffffffffL;
51 void CAST_decrypt(CAST_LONG *data, const CAST_KEY *key)
60 if (!key->short_key) {
61 E_CAST(15, k, l, r, +, ^, -);
62 E_CAST(14, k, r, l, -, +, ^);
63 E_CAST(13, k, l, r, ^, -, +);
64 E_CAST(12, k, r, l, +, ^, -);
66 E_CAST(11, k, l, r, -, +, ^);
67 E_CAST(10, k, r, l, ^, -, +);
68 E_CAST(9, k, l, r, +, ^, -);
69 E_CAST(8, k, r, l, -, +, ^);
70 E_CAST(7, k, l, r, ^, -, +);
71 E_CAST(6, k, r, l, +, ^, -);
72 E_CAST(5, k, l, r, -, +, ^);
73 E_CAST(4, k, r, l, ^, -, +);
74 E_CAST(3, k, l, r, +, ^, -);
75 E_CAST(2, k, r, l, -, +, ^);
76 E_CAST(1, k, l, r, ^, -, +);
77 E_CAST(0, k, r, l, +, ^, -);
79 data[1] = l & 0xffffffffL;
80 data[0] = r & 0xffffffffL;
83 void CAST_cbc_encrypt(const unsigned char *in, unsigned char *out,
84 long length, const CAST_KEY *ks, unsigned char *iv,
87 register CAST_LONG tin0, tin1;
88 register CAST_LONG tout0, tout1, xor0, xor1;
89 register long l = length;
96 for (l -= 8; l >= 0; l -= 8) {
103 CAST_encrypt(tin, ks);
110 n2ln(in, tin0, tin1, l + 8);
115 CAST_encrypt(tin, ks);
127 for (l -= 8; l >= 0; l -= 8) {
132 CAST_decrypt(tin, ks);
133 tout0 = tin[0] ^ xor0;
134 tout1 = tin[1] ^ xor1;
145 CAST_decrypt(tin, ks);
146 tout0 = tin[0] ^ xor0;
147 tout1 = tin[1] ^ xor1;
148 l2nn(tout0, tout1, out, l + 8);
155 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;