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
|
/*************************************************
* Algorithm Lookup Header File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#ifndef BOTAN_LOOKUP_H__
#define BOTAN_LOOKUP_H__
#include <botan/block_cipher.h>
#include <botan/stream_cipher.h>
#include <botan/hash.h>
#include <botan/mac.h>
#include <botan/s2k.h>
#include <botan/filters.h>
#include <botan/mode_pad.h>
#include <botan/kdf.h>
#include <botan/eme.h>
#include <botan/emsa.h>
namespace Botan {
class Library_State;
/*************************************************
* Retrieve an object from the lookup table *
*************************************************/
// NOTE: these functions return internally stored objects, library
// retains ownership
BOTAN_DLL const BlockCipher*
retrieve_block_cipher(Library_State&, const std::string&);
BOTAN_DLL const StreamCipher*
retrieve_stream_cipher(Library_State&, const std::string&);
BOTAN_DLL const HashFunction*
retrieve_hash(Library_State&, const std::string&);
BOTAN_DLL const MessageAuthenticationCode*
retrieve_mac(Library_State&, const std::string&);
/*************************************************
* Get an algorithm object *
*************************************************/
// NOTE: these functions create and return new objects, letting the
// caller assume ownership of them
/**
* Block cipher factory method.
* @param name the name of the desired block cipher
* @return the block cipher object
*/
BOTAN_DLL BlockCipher* get_block_cipher(const std::string& name);
/**
* Stream cipher factory method.
* @param name the name of the desired stream cipher
* @return the stream cipher object
*/
BOTAN_DLL StreamCipher* get_stream_cipher(const std::string& name);
/**
* Hash function factory method.
* @param name the name of the desired hash function
* @return the hash function object
*/
BOTAN_DLL HashFunction* get_hash(const std::string& name);
/**
* MAC factory method.
* @param name the name of the desired MAC
* @return the MAC object
*/
BOTAN_DLL MessageAuthenticationCode* get_mac(const std::string& name);
/**
* String to key algorithm factory method.
* @param name the name of the desired string to key (S2K) algorithm
* @return the string to key algorithm object
*/
BOTAN_DLL S2K* get_s2k(const std::string& name);
/**
* Block cipher padding mode factory method.
* @param name the name of the desired block cipher padding mode
* @return the block cipher padding mode object
*/
BOTAN_DLL BlockCipherModePaddingMethod* get_bc_pad(const std::string& name);
/*************************************************
* Get an EMSA/EME/KDF/MGF function *
*************************************************/
// NOTE: these functions create and return new objects, letting the
// caller assume ownership of them
/**
* Factory method for EME (message-encoding methods for encryption) objects
* @param name the name of the EME to create
* @return the desired EME object
*/
BOTAN_DLL EME* get_eme(const std::string& name);
/**
* Factory method for EMSA (message-encoding methods for signatures
* with appendix) objects
* @param name the name of the EME to create
* @return the desired EME object
*/
BOTAN_DLL EMSA* get_emsa(const std::string& name);
/**
* Factory method for KDF (key derivation function)
* @param name the name of the KDF to create
* @return the desired KDF object
*/
BOTAN_DLL KDF* get_kdf(const std::string& name);
/*************************************************
* Get a cipher object *
*************************************************/
/**
* Factory method for general symmetric cipher filters.
* @param name the name of the desired cipher
* @param key the key to be used for encryption/decryption performed by
* the filter
* @param iv the initialization vector to be used
* @param dir determines whether the filter will be an encrypting or decrypting
* filter
* @return the encryption or decryption filter
*/
BOTAN_DLL Keyed_Filter* get_cipher(const std::string& name,
const SymmetricKey& key,
const InitializationVector& iv,
Cipher_Dir dir);
/**
* Factory method for general symmetric cipher filters.
* @param name the name of the desired cipher
* @param key the key to be used for encryption/decryption performed by
* the filter
* @param dir determines whether the filter will be an encrypting or decrypting
* filter
* @return the encryption or decryption filter
*/
BOTAN_DLL Keyed_Filter* get_cipher(const std::string& name,
const SymmetricKey& key,
Cipher_Dir dir);
/** Factory method for general symmetric cipher filters. No key will
* be set in the filter.
* @param name the name of the desired cipher
* @param dir determines whether the filter will be an encrypting or
* decrypting filter
* @return the encryption or decryption filter
*/
BOTAN_DLL Keyed_Filter* get_cipher(const std::string& name, Cipher_Dir dir);
/**
* Check if an algorithm exists.
* @param name the name of the algorithm to check for
* @return true if the algorithm exists, false otherwise
*/
BOTAN_DLL bool have_algorithm(const std::string& name);
/**
* Check if a block cipher algorithm exists.
* @param name the name of the algorithm to check for
* @return true if the algorithm exists, false otherwise
*/
BOTAN_DLL bool have_block_cipher(const std::string& name);
/**
* Check if a stream cipher algorithm exists.
* @param name the name of the algorithm to check for
* @return true if the algorithm exists, false otherwise
*/
BOTAN_DLL bool have_stream_cipher(const std::string& name);
/**
* Check if a hash algorithm exists.
* @param name the name of the algorithm to check for
* @return true if the algorithm exists, false otherwise
*/
BOTAN_DLL bool have_hash(const std::string& name);
/**
* Check if a MAC algorithm exists.
* @param name the name of the algorithm to check for
* @return true if the algorithm exists, false otherwise
*/
BOTAN_DLL bool have_mac(const std::string& name);
/*************************************************
* Query information about an algorithm *
*************************************************/
/**
* Find out the block size of a certain symmetric algorithm.
* @param name the name of the algorithm
* @return the block size of the specified algorithm
*/
BOTAN_DLL u32bit block_size_of(const std::string& name);
/**
* Find out the output length of a certain symmetric algorithm.
* @param name the name of the algorithm
* @return the output length of the specified algorithm
*/
BOTAN_DLL u32bit output_length_of(const std::string& name);
/**
* Find out the whether a certain key length is allowd for a given
* symmetric algorithm.
* @param keylen the key length in question
* @param name the name of the algorithm
* @return true if the key length is valid for that algorithm, false otherwise
*/
BOTAN_DLL bool valid_keylength_for(u32bit keylen, const std::string& name);
/**
* Find out the minimum key size of a certain symmetric algorithm.
* @param name the name of the algorithm
* @return the minimum key length of the specified algorithm
*/
BOTAN_DLL u32bit min_keylength_of(const std::string& name);
/**
* Find out the maximum key size of a certain symmetric algorithm.
* @param name the name of the algorithm
* @return the maximum key length of the specified algorithm
*/
BOTAN_DLL u32bit max_keylength_of(const std::string& name);
/**
* Find out the size any valid key is a multiple of for a certain algorithm.
* @param name the name of the algorithm
* @return the size any valid key is a multiple of
*/
BOTAN_DLL u32bit keylength_multiple_of(const std::string& name);
}
#endif
|
