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  union {
76    DES_cblock cblock;
77    /* make sure things are correct size on machines with
78     * 8 byte longs */
79    uint32_t deslong[2];
80  } ks[16];
81} DES_key_schedule;
82
83
84#define DES_KEY_SZ (sizeof(DES_cblock))
85#define DES_SCHEDULE_SZ (sizeof(DES_key_schedule))
86
87#define DES_ENCRYPT 1
88#define DES_DECRYPT 0
89
90#define DES_CBC_MODE 0
91#define DES_PCBC_MODE 1
92
93/* DES_set_key performs a key schedule and initialises |schedule| with |key|. */
94OPENSSL_EXPORT void DES_set_key(const DES_cblock *key,
95                                DES_key_schedule *schedule);
96
97/* DES_set_odd_parity sets the parity bits (the least-significant bits in each
98 * byte) of |key| given the other bits in each byte. */
99OPENSSL_EXPORT void DES_set_odd_parity(DES_cblock *key);
100
101/* DES_ecb_encrypt encrypts (or decrypts, if |is_encrypt| is |DES_DECRYPT|) a
102 * single DES block (8 bytes) from in to out, using the key configured in
103 * |schedule|. */
104OPENSSL_EXPORT void DES_ecb_encrypt(const DES_cblock *in, DES_cblock *out,
105                                    const DES_key_schedule *schedule,
106                                    int is_encrypt);
107
108/* DES_ncbc_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) |len|
109 * bytes from |in| to |out| with DES in CBC mode. */
110OPENSSL_EXPORT void DES_ncbc_encrypt(const uint8_t *in, uint8_t *out,
111                                     size_t len,
112                                     const DES_key_schedule *schedule,
113                                     DES_cblock *ivec, int enc);
114
115/* DES_ecb3_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) a single
116 * block (8 bytes) of data from |input| to |output| using 3DES. */
117OPENSSL_EXPORT void DES_ecb3_encrypt(const DES_cblock *input,
118                                     DES_cblock *output,
119                                     const DES_key_schedule *ks1,
120                                     const DES_key_schedule *ks2,
121                                     const DES_key_schedule *ks3,
122                                     int enc);
123
124/* DES_ede3_cbc_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) |len|
125 * bytes from |in| to |out| with 3DES in CBC mode. 3DES uses three keys, thus
126 * the function takes three different |DES_key_schedule|s. */
127OPENSSL_EXPORT void DES_ede3_cbc_encrypt(const uint8_t *in, uint8_t *out,
128                                         size_t len,
129                                         const DES_key_schedule *ks1,
130                                         const DES_key_schedule *ks2,
131                                         const DES_key_schedule *ks3,
132                                         DES_cblock *ivec, int enc);
133
134/* DES_ede2_cbc_encrypt encrypts (or decrypts, if |enc| is |DES_DECRYPT|) |len|
135 * bytes from |in| to |out| with 3DES in CBC mode. With this keying option, the
136 * first and third 3DES keys are identical. Thus, this function takes only two
137 * different |DES_key_schedule|s. */
138OPENSSL_EXPORT void DES_ede2_cbc_encrypt(const uint8_t *in, uint8_t *out,
139                                         size_t len,
140                                         const DES_key_schedule *ks1,
141                                         const DES_key_schedule *ks2,
142                                         DES_cblock *ivec, int enc);
143
144
145#if defined(__cplusplus)
146}  /* extern C */
147#endif
148
149#endif  /* OPENSSL_HEADER_DES_H */
150