1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
|
/** @file
TDES Wrapper Implementation over OpenSSL.
Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "InternalCryptLib.h"
#include <openssl/des.h>
/**
Retrieves the size, in bytes, of the context buffer required for TDES operations.
@return The size, in bytes, of the context buffer required for TDES operations.
**/
UINTN
EFIAPI
TdesGetContextSize (
VOID
)
{
//
// Memory for 3 copies of DES_key_schedule is allocated, for K1, K2 and K3 each.
//
return (UINTN) (3 * sizeof (DES_key_schedule));
}
/**
Initializes user-supplied memory as TDES context for subsequent use.
This function initializes user-supplied memory pointed by TdesContext as TDES context.
In addtion, it sets up all TDES key materials for subsequent encryption and decryption
operations.
There are 3 key options as follows:
KeyLength = 64, Keying option 1: K1 == K2 == K3 (Backward compatibility with DES)
KeyLength = 128, Keying option 2: K1 != K2 and K3 = K1 (Less Security)
KeyLength = 192 Keying option 3: K1 != K2 != K3 (Strongest)
If TdesContext is NULL, then return FALSE.
If Key is NULL, then return FALSE.
If KeyLength is not valid, then return FALSE.
@param[out] TdesContext Pointer to TDES context being initialized.
@param[in] Key Pointer to the user-supplied TDES key.
@param[in] KeyLength Length of TDES key in bits.
@retval TRUE TDES context initialization succeeded.
@retval FALSE TDES context initialization failed.
**/
BOOLEAN
EFIAPI
TdesInit (
OUT VOID *TdesContext,
IN CONST UINT8 *Key,
IN UINTN KeyLength
)
{
DES_key_schedule *KeySchedule;
//
// Check input parameters.
//
if (TdesContext == NULL || Key == NULL || (KeyLength != 64 && KeyLength != 128 && KeyLength != 192)) {
return FALSE;
}
KeySchedule = (DES_key_schedule *) TdesContext;
//
//
//
if (DES_is_weak_key ((const_DES_cblock *) Key)) {
return FALSE;
}
DES_set_key_unchecked ((const_DES_cblock *) Key, KeySchedule);
if (KeyLength == 64) {
CopyMem (KeySchedule + 1, KeySchedule, sizeof (DES_key_schedule));
CopyMem (KeySchedule + 2, KeySchedule, sizeof (DES_key_schedule));
return TRUE;
}
if (DES_is_weak_key ((const_DES_cblock *) Key + 8)) {
return FALSE;
}
DES_set_key_unchecked ((const_DES_cblock *) (Key + 8), KeySchedule + 1);
if (KeyLength == 128) {
CopyMem (KeySchedule + 2, KeySchedule, sizeof (DES_key_schedule));
return TRUE;
}
if (DES_is_weak_key ((const_DES_cblock *) Key + 16)) {
return FALSE;
}
DES_set_key_unchecked ((const_DES_cblock *) (Key + 16), KeySchedule + 2);
return TRUE;
}
/**
Performs TDES encryption on a data buffer of the specified size in ECB mode.
This function performs TDES encryption on data buffer pointed by Input, of specified
size of InputSize, in ECB mode.
InputSize must be multiple of block size (8 bytes). This function does not perform
padding. Caller must perform padding, if necessary, to ensure valid input data size.
TdesContext should be already correctly initialized by TdesInit(). Behavior with
invalid TDES context is undefined.
If TdesContext is NULL, then return FALSE.
If Input is NULL, then return FALSE.
If InputSize is not multiple of block size (8 bytes), then return FALSE.
If Output is NULL, then return FALSE.
@param[in] TdesContext Pointer to the TDES context.
@param[in] Input Pointer to the buffer containing the data to be encrypted.
@param[in] InputSize Size of the Input buffer in bytes.
@param[out] Output Pointer to a buffer that receives the TDES encryption output.
@retval TRUE TDES encryption succeeded.
@retval FALSE TDES encryption failed.
**/
BOOLEAN
EFIAPI
TdesEcbEncrypt (
IN VOID *TdesContext,
IN CONST UINT8 *Input,
IN UINTN InputSize,
OUT UINT8 *Output
)
{
DES_key_schedule *KeySchedule;
//
// Check input parameters.
//
if (TdesContext == NULL || Input == NULL || (InputSize % TDES_BLOCK_SIZE) != 0 || Output == NULL) {
return FALSE;
}
KeySchedule = (DES_key_schedule *) TdesContext;
while (InputSize > 0) {
DES_ecb3_encrypt (
(const_DES_cblock *) Input,
(DES_cblock *) Output,
KeySchedule,
KeySchedule + 1,
KeySchedule + 2,
DES_ENCRYPT
);
Input += TDES_BLOCK_SIZE;
Output += TDES_BLOCK_SIZE;
InputSize -= TDES_BLOCK_SIZE;
}
return TRUE;
}
/**
Performs TDES decryption on a data buffer of the specified size in ECB mode.
This function performs TDES decryption on data buffer pointed by Input, of specified
size of InputSize, in ECB mode.
InputSize must be multiple of block size (8 bytes). This function does not perform
padding. Caller must perform padding, if necessary, to ensure valid input data size.
TdesContext should be already correctly initialized by TdesInit(). Behavior with
invalid TDES context is undefined.
If TdesContext is NULL, then return FALSE.
If Input is NULL, then return FALSE.
If InputSize is not multiple of block size (8 bytes), then return FALSE.
If Output is NULL, then return FALSE.
@param[in] TdesContext Pointer to the TDES context.
@param[in] Input Pointer to the buffer containing the data to be decrypted.
@param[in] InputSize Size of the Input buffer in bytes.
@param[out] Output Pointer to a buffer that receives the TDES decryption output.
@retval TRUE TDES decryption succeeded.
@retval FALSE TDES decryption failed.
**/
BOOLEAN
EFIAPI
TdesEcbDecrypt (
IN VOID *TdesContext,
IN CONST UINT8 *Input,
IN UINTN InputSize,
OUT UINT8 *Output
)
{
DES_key_schedule *KeySchedule;
//
// Check input parameters.
//
if (TdesContext == NULL || Input == NULL || (InputSize % TDES_BLOCK_SIZE) != 0 || Output == NULL) {
return FALSE;
}
KeySchedule = (DES_key_schedule *) TdesContext;
while (InputSize > 0) {
DES_ecb3_encrypt (
(const_DES_cblock *) Input,
(DES_cblock *) Output,
KeySchedule,
KeySchedule + 1,
KeySchedule + 2,
DES_DECRYPT
);
Input += TDES_BLOCK_SIZE;
Output += TDES_BLOCK_SIZE;
InputSize -= TDES_BLOCK_SIZE;
}
return TRUE;
}
/**
Performs TDES encryption on a data buffer of the specified size in CBC mode.
This function performs TDES encryption on data buffer pointed by Input, of specified
size of InputSize, in CBC mode.
InputSize must be multiple of block size (8 bytes). This function does not perform
padding. Caller must perform padding, if necessary, to ensure valid input data size.
Initialization vector should be one block size (8 bytes).
TdesContext should be already correctly initialized by TdesInit(). Behavior with
invalid TDES context is undefined.
If TdesContext is NULL, then return FALSE.
If Input is NULL, then return FALSE.
If InputSize is not multiple of block size (8 bytes), then return FALSE.
If Ivec is NULL, then return FALSE.
If Output is NULL, then return FALSE.
@param[in] TdesContext Pointer to the TDES context.
@param[in] Input Pointer to the buffer containing the data to be encrypted.
@param[in] InputSize Size of the Input buffer in bytes.
@param[in] Ivec Pointer to initialization vector.
@param[out] Output Pointer to a buffer that receives the TDES encryption output.
@retval TRUE TDES encryption succeeded.
@retval FALSE TDES encryption failed.
**/
BOOLEAN
EFIAPI
TdesCbcEncrypt (
IN VOID *TdesContext,
IN CONST UINT8 *Input,
IN UINTN InputSize,
IN CONST UINT8 *Ivec,
OUT UINT8 *Output
)
{
DES_key_schedule *KeySchedule;
UINT8 IvecBuffer[TDES_BLOCK_SIZE];
//
// Check input parameters.
//
if (TdesContext == NULL || Input == NULL || (InputSize % TDES_BLOCK_SIZE) != 0 || Ivec == NULL || Output == NULL) {
return FALSE;
}
KeySchedule = (DES_key_schedule *) TdesContext;
CopyMem (IvecBuffer, Ivec, TDES_BLOCK_SIZE);
DES_ede3_cbc_encrypt (
Input,
Output,
(UINT32) InputSize,
KeySchedule,
KeySchedule + 1,
KeySchedule + 2,
(DES_cblock *) IvecBuffer,
DES_ENCRYPT
);
return TRUE;
}
/**
Performs TDES decryption on a data buffer of the specified size in CBC mode.
This function performs TDES decryption on data buffer pointed by Input, of specified
size of InputSize, in CBC mode.
InputSize must be multiple of block size (8 bytes). This function does not perform
padding. Caller must perform padding, if necessary, to ensure valid input data size.
Initialization vector should be one block size (8 bytes).
TdesContext should be already correctly initialized by TdesInit(). Behavior with
invalid TDES context is undefined.
If TdesContext is NULL, then return FALSE.
If Input is NULL, then return FALSE.
If InputSize is not multiple of block size (8 bytes), then return FALSE.
If Ivec is NULL, then return FALSE.
If Output is NULL, then return FALSE.
@param[in] TdesContext Pointer to the TDES context.
@param[in] Input Pointer to the buffer containing the data to be encrypted.
@param[in] InputSize Size of the Input buffer in bytes.
@param[in] Ivec Pointer to initialization vector.
@param[out] Output Pointer to a buffer that receives the TDES encryption output.
@retval TRUE TDES decryption succeeded.
@retval FALSE TDES decryption failed.
**/
BOOLEAN
EFIAPI
TdesCbcDecrypt (
IN VOID *TdesContext,
IN CONST UINT8 *Input,
IN UINTN InputSize,
IN CONST UINT8 *Ivec,
OUT UINT8 *Output
)
{
DES_key_schedule *KeySchedule;
UINT8 IvecBuffer[TDES_BLOCK_SIZE];
//
// Check input parameters.
//
if (TdesContext == NULL || Input == NULL || (InputSize % TDES_BLOCK_SIZE) != 0 || Ivec == NULL || Output == NULL) {
return FALSE;
}
KeySchedule = (DES_key_schedule *) TdesContext;
CopyMem (IvecBuffer, Ivec, TDES_BLOCK_SIZE);
DES_ede3_cbc_encrypt (
Input,
Output,
(UINT32) InputSize,
KeySchedule,
KeySchedule + 1,
KeySchedule + 2,
(DES_cblock *) IvecBuffer,
DES_DECRYPT
);
return TRUE;
}
|
