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#ifndef OPENSSL_HEADER_DES_H
58#define OPENSSL_HEADER_DES_H
59
60#include <openssl/base.h>
61
62#if defined(__cplusplus)
63extern "C" {
64#endif
65
66
67// DES.
68
69
70typedef struct DES_cblock_st {
71 uint8_t bytes[8];
72} DES_cblock;
73
74typedef struct DES_ks {
75 uint32_t subkeys[16][2];
76} DES_key_schedule;
77
78
79#define DES_KEY_SZ (sizeof(DES_cblock))
80#define DES_SCHEDULE_SZ (sizeof(DES_key_schedule))
81
82#define DES_ENCRYPT 1
83#define DES_DECRYPT 0
84
85#define DES_CBC_MODE 0
86#define DES_PCBC_MODE 1
87
88// DES_set_key performs a key schedule and initialises |schedule| with |key|.
89OPENSSL_EXPORT void DES_set_key(const DES_cblock *key,
90 DES_key_schedule *schedule);
91
92// DES_set_odd_parity sets the parity bits (the least-significant bits in each
93// byte) of |key| given the other bits in each byte.
94OPENSSL_EXPORT void DES_set_odd_parity(DES_cblock *key);
95
96// DES_ecb_encrypt encrypts (or decrypts, if |is_encrypt| is |DES_DECRYPT|) a
97// single DES block (8 bytes) from in to out, using the key configured in
98// |schedule|.
99OPENSSL_EXPORT void DES_ecb_encrypt(const DES_cblock *in, DES_cblock *out,
100 const DES_key_schedule *schedule,
101 int is_encrypt);
102
103// DES_ncbc_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) |len|
104// bytes from |in| to |out| with DES in CBC mode.
105OPENSSL_EXPORT void DES_ncbc_encrypt(const uint8_t *in, uint8_t *out,
106 size_t len,
107 const DES_key_schedule *schedule,
108 DES_cblock *ivec, int enc);
109
110// DES_ecb3_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) a single
111// block (8 bytes) of data from |input| to |output| using 3DES.
112OPENSSL_EXPORT void DES_ecb3_encrypt(const DES_cblock *input,
113 DES_cblock *output,
114 const DES_key_schedule *ks1,
115 const DES_key_schedule *ks2,
116 const DES_key_schedule *ks3,
117 int enc);
118
119// DES_ede3_cbc_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) |len|
120// bytes from |in| to |out| with 3DES in CBC mode. 3DES uses three keys, thus
121// the function takes three different |DES_key_schedule|s.
122OPENSSL_EXPORT void DES_ede3_cbc_encrypt(const uint8_t *in, uint8_t *out,
123 size_t len,
124 const DES_key_schedule *ks1,
125 const DES_key_schedule *ks2,
126 const DES_key_schedule *ks3,
127 DES_cblock *ivec, int enc);
128
129// DES_ede2_cbc_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) |len|
130// bytes from |in| to |out| with 3DES in CBC mode. With this keying option, the
131// first and third 3DES keys are identical. Thus, this function takes only two
132// different |DES_key_schedule|s.
133OPENSSL_EXPORT void DES_ede2_cbc_encrypt(const uint8_t *in, uint8_t *out,
134 size_t len,
135 const DES_key_schedule *ks1,
136 const DES_key_schedule *ks2,
137 DES_cblock *ivec, int enc);
138
139
140// Deprecated functions.
141
142// DES_set_key_unchecked calls |DES_set_key|.
143OPENSSL_EXPORT void DES_set_key_unchecked(const DES_cblock *key,
144 DES_key_schedule *schedule);
145
146OPENSSL_EXPORT void DES_ede3_cfb64_encrypt(const uint8_t *in, uint8_t *out,
147 long length, DES_key_schedule *ks1,
148 DES_key_schedule *ks2,
149 DES_key_schedule *ks3,
150 DES_cblock *ivec, int *num, int enc);
151
152OPENSSL_EXPORT void DES_ede3_cfb_encrypt(const uint8_t *in, uint8_t *out,
153 int numbits, long length,
154 DES_key_schedule *ks1,
155 DES_key_schedule *ks2,
156 DES_key_schedule *ks3,
157 DES_cblock *ivec, int enc);
158
159
160// Private functions.
161//
162// These functions are only exported for use in |decrepit|.
163
164OPENSSL_EXPORT void DES_decrypt3(uint32_t *data, const DES_key_schedule *ks1,
165 const DES_key_schedule *ks2,
166 const DES_key_schedule *ks3);
167
168OPENSSL_EXPORT void DES_encrypt3(uint32_t *data, const DES_key_schedule *ks1,
169 const DES_key_schedule *ks2,
170 const DES_key_schedule *ks3);
171
172
173#if defined(__cplusplus)
174} // extern C
175#endif
176
177#endif // OPENSSL_HEADER_DES_H
178