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
|
#include <vector>
#include <string>
#include <botan/lookup.h>
#include <botan/filters.h>
#ifdef BOTAN_EXT_COMPRESSOR_BZIP2
#include <botan/bzip2.h>
#endif
#ifdef BOTAN_EXT_COMPRESSOR_GZIP
#include <botan/gzip.h>
#endif
#ifdef BOTAN_EXT_COMPRESSOR_ZLIB
#include <botan/zlib.h>
#endif
using namespace Botan;
#include "common.h"
Filter* lookup(const std::string& algname,
const std::vector<std::string>& params,
const std::string& section)
{
std::string key = params[0];
std::string iv = params[1];
Filter* filter = 0;
// The order of the lookup has to change based on how the names are
// formatted and parsed.
filter = lookup_kdf(algname, key, iv);
if(filter) return filter;
if(section == "Cipher Modes (Decryption)")
filter = lookup_cipher(algname, key, iv, false);
else
filter = lookup_cipher(algname, key, iv, true);
if(filter) return filter;
filter = lookup_block(algname, key);
if(filter) return filter;
filter = lookup_rng(algname, key);
if(filter) return filter;
filter = lookup_encoder(algname);
if(filter) return filter;
filter = lookup_hash(algname);
if(filter) return filter;
filter = lookup_mac(algname, key);
if(filter) return filter;
filter = lookup_s2k(algname, params);
if(filter) return filter;
return 0;
}
Filter* lookup_hash(const std::string& algname)
{
Filter* hash = 0;
try {
hash = new Hash_Filter(algname);
}
catch(Algorithm_Not_Found) {}
return hash;
}
Filter* lookup_mac(const std::string& algname, const std::string& key)
{
Filter* mac = 0;
try {
mac = new MAC_Filter(algname, key);
}
catch(Algorithm_Not_Found) {}
return mac;
}
Filter* lookup_cipher(const std::string& algname, const std::string& key,
const std::string& iv, bool encrypt)
{
try {
if(encrypt)
return get_cipher(algname, key, iv, ENCRYPTION);
else
return get_cipher(algname, key, iv, DECRYPTION);
}
catch(Algorithm_Not_Found) {}
catch(Invalid_Algorithm_Name) {}
return 0;
}
Filter* lookup_encoder(const std::string& algname)
{
if(algname == "Base64_Encode")
return new Base64_Encoder;
if(algname == "Base64_Decode")
return new Base64_Decoder;
#ifdef BOTAN_EXT_COMPRESSOR_BZIP2
if(algname == "Bzip_Compression")
return new Bzip_Compression(9);
if(algname == "Bzip_Decompression")
return new Bzip_Decompression;
#endif
#ifdef BOTAN_EXT_COMPRESSOR_GZIP
if(algname == "Gzip_Compression")
return new Gzip_Compression(9);
if(algname == "Gzip_Decompression")
return new Gzip_Decompression;
#endif
#ifdef BOTAN_EXT_COMPRESSOR_ZLIB
if(algname == "Zlib_Compression")
return new Zlib_Compression(9);
if(algname == "Zlib_Decompression")
return new Zlib_Decompression;
#endif
return 0;
}
|
