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
|
/*
* ---------------------------------------------------------------------------
* OpenAES License
* ---------------------------------------------------------------------------
* Copyright (c) 2012, Nabil S. Al Ramli, www.nalramli.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* ---------------------------------------------------------------------------
*/
#ifndef _OAES_LIB_H
#define _OAES_LIB_H
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _WIN32
# ifdef OAES_SHARED
# ifdef oaes_lib_EXPORTS
# define OAES_API __declspec(dllexport)
# else
# define OAES_API __declspec(dllimport)
# endif
# else
# define OAES_API
# endif
#else
# define OAES_API
#endif // WIN32
#define OAES_VERSION "0.8.1"
#define OAES_BLOCK_SIZE 16
typedef void OAES_CTX;
typedef enum
{
OAES_RET_FIRST = 0,
OAES_RET_SUCCESS = 0,
OAES_RET_UNKNOWN,
OAES_RET_ARG1,
OAES_RET_ARG2,
OAES_RET_ARG3,
OAES_RET_ARG4,
OAES_RET_ARG5,
OAES_RET_NOKEY,
OAES_RET_MEM,
OAES_RET_BUF,
OAES_RET_HEADER,
OAES_RET_COUNT
} OAES_RET;
/*
* oaes_set_option() takes one of these values for its [option] parameter
* some options accept either an optional or a required [value] parameter
*/
// no option
#define OAES_OPTION_NONE 0
// enable ECB mode, disable CBC mode
#define OAES_OPTION_ECB 1
// enable CBC mode, disable ECB mode
// value is optional, may pass uint8_t iv[OAES_BLOCK_SIZE] to specify
// the value of the initialization vector, iv
#define OAES_OPTION_CBC 2
#ifdef OAES_DEBUG
typedef int ( * oaes_step_cb ) (
const uint8_t state[OAES_BLOCK_SIZE],
const char * step_name,
int step_count,
void * user_data );
// enable state stepping mode
// value is required, must pass oaes_step_cb to receive the state at each step
#define OAES_OPTION_STEP_ON 4
// disable state stepping mode
#define OAES_OPTION_STEP_OFF 8
#endif // OAES_DEBUG
typedef uint16_t OAES_OPTION;
typedef struct _oaes_key
{
size_t data_len;
uint8_t *data;
size_t exp_data_len;
uint8_t *exp_data;
size_t num_keys;
size_t key_base;
} oaes_key;
typedef struct _oaes_ctx
{
#ifdef OAES_HAVE_ISAAC
randctx * rctx;
#endif // OAES_HAVE_ISAAC
#ifdef OAES_DEBUG
oaes_step_cb step_cb;
#endif // OAES_DEBUG
oaes_key * key;
OAES_OPTION options;
uint8_t iv[OAES_BLOCK_SIZE];
} oaes_ctx;
/*
* // usage:
*
* OAES_CTX * ctx = oaes_alloc();
* .
* .
* .
* {
* oaes_gen_key_xxx( ctx );
* {
* oaes_key_export( ctx, _buf, &_buf_len );
* // or
* oaes_key_export_data( ctx, _buf, &_buf_len );\
* }
* }
* // or
* {
* oaes_key_import( ctx, _buf, _buf_len );
* // or
* oaes_key_import_data( ctx, _buf, _buf_len );
* }
* .
* .
* .
* oaes_encrypt( ctx, m, m_len, c, &c_len );
* .
* .
* .
* oaes_decrypt( ctx, c, c_len, m, &m_len );
* .
* .
* .
* oaes_free( &ctx );
*/
OAES_API OAES_CTX * oaes_alloc(void);
OAES_API OAES_RET oaes_free( OAES_CTX ** ctx );
OAES_API OAES_RET oaes_set_option( OAES_CTX * ctx,
OAES_OPTION option, const void * value );
OAES_API OAES_RET oaes_key_gen_128( OAES_CTX * ctx );
OAES_API OAES_RET oaes_key_gen_192( OAES_CTX * ctx );
OAES_API OAES_RET oaes_key_gen_256( OAES_CTX * ctx );
// export key with header information
// set data == NULL to get the required data_len
OAES_API OAES_RET oaes_key_export( OAES_CTX * ctx,
uint8_t * data, size_t * data_len );
// directly export the data from key
// set data == NULL to get the required data_len
OAES_API OAES_RET oaes_key_export_data( OAES_CTX * ctx,
uint8_t * data, size_t * data_len );
// import key with header information
OAES_API OAES_RET oaes_key_import( OAES_CTX * ctx,
const uint8_t * data, size_t data_len );
// directly import data into key
OAES_API OAES_RET oaes_key_import_data( OAES_CTX * ctx,
const uint8_t * data, size_t data_len );
// set c == NULL to get the required c_len
OAES_API OAES_RET oaes_encrypt( OAES_CTX * ctx,
const uint8_t * m, size_t m_len, uint8_t * c, size_t * c_len );
// set m == NULL to get the required m_len
OAES_API OAES_RET oaes_decrypt( OAES_CTX * ctx,
const uint8_t * c, size_t c_len, uint8_t * m, size_t * m_len );
// set buf == NULL to get the required buf_len
OAES_API OAES_RET oaes_sprintf(
char * buf, size_t * buf_len, const uint8_t * data, size_t data_len );
OAES_API OAES_RET oaes_encryption_round( const uint8_t * key, uint8_t * c );
OAES_API OAES_RET oaes_pseudo_encrypt_ecb( OAES_CTX * ctx, uint8_t * c );
#ifdef __cplusplus
}
#endif
#endif // _OAES_LIB_H
|
