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
|
/*************************************************
* Basic No-Op Engine Source File *
* (C) 1999-2008 The Botan Project *
*************************************************/
#include <botan/engine.h>
#include <botan/libstate.h>
#include <botan/stl_util.h>
#include <botan/lookup.h>
namespace Botan {
namespace {
/*************************************************
* Algorithm Cache *
*************************************************/
template<typename T>
class Algorithm_Cache_Impl : public Engine::Algorithm_Cache<T>
{
public:
T* get(const std::string& name) const
{
Mutex_Holder lock(mutex);
return search_map(mappings, name);
}
void add(T* algo, const std::string& index_name = "") const
{
if(!algo)
return;
Mutex_Holder lock(mutex);
const std::string name =
(index_name != "" ? index_name : algo->name());
if(mappings.find(name) != mappings.end())
delete mappings[name];
mappings[name] = algo;
}
Algorithm_Cache_Impl()
{
mutex = global_state().get_mutex();
}
~Algorithm_Cache_Impl()
{
typename std::map<std::string, T*>::iterator i = mappings.begin();
while(i != mappings.end())
{
delete i->second;
++i;
}
delete mutex;
}
private:
Mutex* mutex;
mutable std::map<std::string, T*> mappings;
};
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
IF_Operation* Engine::if_op(const BigInt&, const BigInt&, const BigInt&,
const BigInt&, const BigInt&, const BigInt&,
const BigInt&, const BigInt&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
DSA_Operation* Engine::dsa_op(const DL_Group&, const BigInt&,
const BigInt&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
NR_Operation* Engine::nr_op(const DL_Group&, const BigInt&,
const BigInt&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
ELG_Operation* Engine::elg_op(const DL_Group&, const BigInt&,
const BigInt&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
DH_Operation* Engine::dh_op(const DL_Group&, const BigInt&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
Modular_Exponentiator* Engine::mod_exp(const BigInt&,
Power_Mod::Usage_Hints) const
{
return 0;
}
/*************************************************
* Acquire a BlockCipher *
*************************************************/
const BlockCipher* Engine::block_cipher(const std::string& name) const
{
return lookup_algo(cache_of_bc, deref_alias(name),
this, &Engine::find_block_cipher);
}
/*************************************************
* Acquire a StreamCipher *
*************************************************/
const StreamCipher* Engine::stream_cipher(const std::string& name) const
{
return lookup_algo(cache_of_sc, deref_alias(name),
this, &Engine::find_stream_cipher);
}
/*************************************************
* Acquire a HashFunction *
*************************************************/
const HashFunction* Engine::hash(const std::string& name) const
{
return lookup_algo(cache_of_hf, deref_alias(name),
this, &Engine::find_hash);
}
/*************************************************
* Acquire a MessageAuthenticationCode *
*************************************************/
const MessageAuthenticationCode* Engine::mac(const std::string& name) const
{
return lookup_algo(cache_of_mac, deref_alias(name),
this, &Engine::find_mac);
}
/*************************************************
* Acquire a S2K object *
*************************************************/
const S2K* Engine::s2k(const std::string& name) const
{
return lookup_algo(cache_of_s2k, deref_alias(name),
this, &Engine::find_s2k);
}
/*************************************************
* Acquire a cipher padding object *
*************************************************/
const BlockCipherModePaddingMethod*
Engine::bc_pad(const std::string& name) const
{
return lookup_algo(cache_of_bc_pad, deref_alias(name),
this, &Engine::find_bc_pad);
}
/*************************************************
* Add a block cipher to the lookup table *
*************************************************/
void Engine::add_algorithm(BlockCipher* algo) const
{
cache_of_bc->add(algo);
}
/*************************************************
* Add a stream cipher to the lookup table *
*************************************************/
void Engine::add_algorithm(StreamCipher* algo) const
{
cache_of_sc->add(algo);
}
/*************************************************
* Add a hash function to the lookup table *
*************************************************/
void Engine::add_algorithm(HashFunction* algo) const
{
cache_of_hf->add(algo);
}
/*************************************************
* Add a MAC to the lookup table *
*************************************************/
void Engine::add_algorithm(MessageAuthenticationCode* algo) const
{
cache_of_mac->add(algo);
}
/*************************************************
* Add a S2K to the lookup table *
*************************************************/
void Engine::add_algorithm(S2K* algo) const
{
cache_of_s2k->add(algo);
}
/*************************************************
* Add a cipher pad method to the lookup table *
*************************************************/
void Engine::add_algorithm(BlockCipherModePaddingMethod* algo) const
{
cache_of_bc_pad->add(algo);
}
/*************************************************
* Create an Engine *
*************************************************/
Engine::Engine()
{
cache_of_bc = new Algorithm_Cache_Impl<BlockCipher>();
cache_of_sc = new Algorithm_Cache_Impl<StreamCipher>();
cache_of_hf = new Algorithm_Cache_Impl<HashFunction>();
cache_of_mac = new Algorithm_Cache_Impl<MessageAuthenticationCode>();
cache_of_s2k = new Algorithm_Cache_Impl<S2K>();
cache_of_bc_pad =
new Algorithm_Cache_Impl<BlockCipherModePaddingMethod>();
}
/*************************************************
* Destroy an Engine *
*************************************************/
Engine::~Engine()
{
delete cache_of_bc;
delete cache_of_sc;
delete cache_of_hf;
delete cache_of_mac;
delete cache_of_s2k;
delete cache_of_bc_pad;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
BlockCipher* Engine::find_block_cipher(const std::string&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
StreamCipher* Engine::find_stream_cipher(const std::string&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
HashFunction* Engine::find_hash(const std::string&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
MessageAuthenticationCode* Engine::find_mac(const std::string&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
S2K* Engine::find_s2k(const std::string&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
BlockCipherModePaddingMethod* Engine::find_bc_pad(const std::string&) const
{
return 0;
}
/*************************************************
* Basic No-Op Engine Implementation *
*************************************************/
Keyed_Filter* Engine::get_cipher(const std::string&, Cipher_Dir)
{
return 0;
}
}
|