Commit | Line | Data |
---|---|---|
a66fca86 AD |
1 | /** |
2 | * \file des.h | |
3 | * | |
4 | * \brief DES block cipher | |
5 | * | |
6 | * Copyright (C) 2006-2013, Brainspark B.V. | |
7 | * | |
8 | * This file is part of PolarSSL (http://www.polarssl.org) | |
9 | * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> | |
10 | * | |
11 | * All rights reserved. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License along | |
24 | * with this program; if not, write to the Free Software Foundation, Inc., | |
25 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
26 | */ | |
27 | #ifndef POLARSSL_DES_H | |
28 | #define POLARSSL_DES_H | |
29 | ||
30 | //#include "config.h" | |
afceaf40 MHS |
31 | /** |
32 | * \def POLARSSL_CIPHER_MODE_CBC | |
33 | * | |
34 | * Enable Cipher Block Chaining mode (CBC) for symmetric ciphers. | |
35 | */ | |
36 | #define POLARSSL_CIPHER_MODE_CBC | |
37 | ||
a66fca86 AD |
38 | #include <string.h> |
39 | ||
40 | #if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32) | |
41 | #include <basetsd.h> | |
42 | typedef UINT32 uint32_t; | |
43 | #else | |
44 | #include <inttypes.h> | |
45 | #endif | |
46 | ||
47 | #define DES_ENCRYPT 1 | |
48 | #define DES_DECRYPT 0 | |
49 | ||
50 | #define POLARSSL_ERR_DES_INVALID_INPUT_LENGTH -0x0032 /**< The data input has an invalid length. */ | |
51 | ||
52 | #define DES_KEY_SIZE 8 | |
53 | ||
54 | #if !defined(POLARSSL_DES_ALT) | |
55 | // Regular implementation | |
56 | // | |
57 | ||
58 | #ifdef __cplusplus | |
59 | extern "C" { | |
60 | #endif | |
61 | ||
62 | /** | |
63 | * \brief DES context structure | |
64 | */ | |
65 | typedef struct | |
66 | { | |
67 | int mode; /*!< encrypt/decrypt */ | |
68 | uint32_t sk[32]; /*!< DES subkeys */ | |
69 | } | |
70 | des_context; | |
71 | ||
72 | /** | |
73 | * \brief Triple-DES context structure | |
74 | */ | |
75 | typedef struct | |
76 | { | |
77 | int mode; /*!< encrypt/decrypt */ | |
78 | uint32_t sk[96]; /*!< 3DES subkeys */ | |
79 | } | |
80 | des3_context; | |
81 | ||
82 | /** | |
83 | * \brief Set key parity on the given key to odd. | |
84 | * | |
85 | * DES keys are 56 bits long, but each byte is padded with | |
86 | * a parity bit to allow verification. | |
87 | * | |
88 | * \param key 8-byte secret key | |
89 | */ | |
90 | void des_key_set_parity( unsigned char key[DES_KEY_SIZE] ); | |
91 | ||
92 | /** | |
93 | * \brief Check that key parity on the given key is odd. | |
94 | * | |
95 | * DES keys are 56 bits long, but each byte is padded with | |
96 | * a parity bit to allow verification. | |
97 | * | |
98 | * \param key 8-byte secret key | |
99 | * | |
100 | * \return 0 is parity was ok, 1 if parity was not correct. | |
101 | */ | |
102 | int des_key_check_key_parity( const unsigned char key[DES_KEY_SIZE] ); | |
103 | ||
104 | /** | |
105 | * \brief Check that key is not a weak or semi-weak DES key | |
106 | * | |
107 | * \param key 8-byte secret key | |
108 | * | |
109 | * \return 0 if no weak key was found, 1 if a weak key was identified. | |
110 | */ | |
111 | int des_key_check_weak( const unsigned char key[DES_KEY_SIZE] ); | |
112 | ||
113 | /** | |
114 | * \brief DES key schedule (56-bit, encryption) | |
115 | * | |
116 | * \param ctx DES context to be initialized | |
117 | * \param key 8-byte secret key | |
118 | * | |
119 | * \return 0 | |
120 | */ | |
121 | int des_setkey_enc( des_context *ctx, const unsigned char key[DES_KEY_SIZE] ); | |
122 | ||
123 | /** | |
124 | * \brief DES key schedule (56-bit, decryption) | |
125 | * | |
126 | * \param ctx DES context to be initialized | |
127 | * \param key 8-byte secret key | |
128 | * | |
129 | * \return 0 | |
130 | */ | |
131 | int des_setkey_dec( des_context *ctx, const unsigned char key[DES_KEY_SIZE] ); | |
132 | ||
133 | /** | |
134 | * \brief Triple-DES key schedule (112-bit, encryption) | |
135 | * | |
136 | * \param ctx 3DES context to be initialized | |
137 | * \param key 16-byte secret key | |
138 | * | |
139 | * \return 0 | |
140 | */ | |
141 | int des3_set2key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] ); | |
142 | ||
143 | /** | |
144 | * \brief Triple-DES key schedule (112-bit, decryption) | |
145 | * | |
146 | * \param ctx 3DES context to be initialized | |
147 | * \param key 16-byte secret key | |
148 | * | |
149 | * \return 0 | |
150 | */ | |
151 | int des3_set2key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] ); | |
152 | ||
153 | /** | |
154 | * \brief Triple-DES key schedule (168-bit, encryption) | |
155 | * | |
156 | * \param ctx 3DES context to be initialized | |
157 | * \param key 24-byte secret key | |
158 | * | |
159 | * \return 0 | |
160 | */ | |
161 | int des3_set3key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] ); | |
162 | ||
163 | /** | |
164 | * \brief Triple-DES key schedule (168-bit, decryption) | |
165 | * | |
166 | * \param ctx 3DES context to be initialized | |
167 | * \param key 24-byte secret key | |
168 | * | |
169 | * \return 0 | |
170 | */ | |
171 | int des3_set3key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] ); | |
172 | ||
173 | /** | |
174 | * \brief DES-ECB block encryption/decryption | |
175 | * | |
176 | * \param ctx DES context | |
177 | * \param input 64-bit input block | |
178 | * \param output 64-bit output block | |
179 | * | |
180 | * \return 0 if successful | |
181 | */ | |
182 | int des_crypt_ecb( des_context *ctx, | |
183 | const unsigned char input[8], | |
184 | unsigned char output[8] ); | |
185 | ||
186 | #if defined(POLARSSL_CIPHER_MODE_CBC) | |
187 | /** | |
188 | * \brief DES-CBC buffer encryption/decryption | |
189 | * | |
190 | * \param ctx DES context | |
191 | * \param mode DES_ENCRYPT or DES_DECRYPT | |
192 | * \param length length of the input data | |
193 | * \param iv initialization vector (updated after use) | |
194 | * \param input buffer holding the input data | |
195 | * \param output buffer holding the output data | |
196 | */ | |
197 | int des_crypt_cbc( des_context *ctx, | |
198 | int mode, | |
199 | size_t length, | |
200 | unsigned char iv[8], | |
201 | const unsigned char *input, | |
202 | unsigned char *output ); | |
203 | #endif /* POLARSSL_CIPHER_MODE_CBC */ | |
204 | ||
205 | /** | |
206 | * \brief 3DES-ECB block encryption/decryption | |
207 | * | |
208 | * \param ctx 3DES context | |
209 | * \param input 64-bit input block | |
210 | * \param output 64-bit output block | |
211 | * | |
212 | * \return 0 if successful | |
213 | */ | |
214 | int des3_crypt_ecb( des3_context *ctx, | |
215 | const unsigned char input[8], | |
216 | unsigned char output[8] ); | |
217 | ||
218 | #if defined(POLARSSL_CIPHER_MODE_CBC) | |
219 | /** | |
220 | * \brief 3DES-CBC buffer encryption/decryption | |
221 | * | |
222 | * \param ctx 3DES context | |
223 | * \param mode DES_ENCRYPT or DES_DECRYPT | |
224 | * \param length length of the input data | |
225 | * \param iv initialization vector (updated after use) | |
226 | * \param input buffer holding the input data | |
227 | * \param output buffer holding the output data | |
228 | * | |
229 | * \return 0 if successful, or POLARSSL_ERR_DES_INVALID_INPUT_LENGTH | |
230 | */ | |
231 | int des3_crypt_cbc( des3_context *ctx, | |
232 | int mode, | |
233 | size_t length, | |
234 | unsigned char iv[8], | |
235 | const unsigned char *input, | |
236 | unsigned char *output ); | |
237 | #endif /* POLARSSL_CIPHER_MODE_CBC */ | |
238 | ||
239 | #ifdef __cplusplus | |
240 | } | |
241 | #endif | |
242 | ||
243 | #else /* POLARSSL_DES_ALT */ | |
244 | #include "des_alt.h" | |
245 | #endif /* POLARSSL_DES_ALT */ | |
246 | ||
247 | #ifdef __cplusplus | |
248 | extern "C" { | |
249 | #endif | |
250 | ||
251 | /** | |
252 | * \brief Checkup routine | |
253 | * | |
254 | * \return 0 if successful, or 1 if the test failed | |
255 | */ | |
256 | int des_self_test( int verbose ); | |
257 | ||
258 | #ifdef __cplusplus | |
259 | } | |
260 | #endif | |
261 | ||
262 | #endif /* des.h */ |