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
|
/*
* (C) 2014,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "cli.h"
#include <botan/transform.h>
#if defined(BOTAN_HAS_COMPRESSION)
#include <botan/compression.h>
#endif
namespace Botan_CLI {
namespace {
void do_compress(Botan::Transform& comp,
std::ifstream& in,
std::ostream& out,
size_t buf_size)
{
Botan::secure_vector<uint8_t> buf;
comp.start();
while(in.good())
{
buf.resize(buf_size);
in.read(reinterpret_cast<char*>(&buf[0]), buf.size());
buf.resize(in.gcount());
comp.update(buf);
out.write(reinterpret_cast<const char*>(&buf[0]), buf.size());
}
buf.clear();
comp.finish(buf);
out.write(reinterpret_cast<const char*>(&buf[0]), buf.size());
}
}
class Compress final : public Command
{
public:
Compress() : Command("compress --type=gzip --level=6 --buf-size=8192 file") {}
std::string output_filename(const std::string& input_fsname,
const std::string& comp_type)
{
const std::map<std::string, std::string> suffixes = {
{ "zlib", "zlib" },
{ "gzip", "gz" },
{ "bzip2", "bz2" },
{ "lzma", "xz" },
};
auto suffix_info = suffixes.find(comp_type);
if(suffixes.count(comp_type) == 0)
{
throw CLI_Error_Unsupported("Compressing", comp_type);
}
return input_fsname + "." + suffix_info->second;
}
void go() override
{
const std::string comp_type = get_arg("type");
std::unique_ptr<Botan::Transform> compress;
#if defined(BOTAN_HAS_COMPRESSION)
compress.reset(Botan::make_compressor(comp_type, get_arg_sz("level")));
#endif
if(!compress)
{
throw CLI_Error_Unsupported("Compression", comp_type);
}
const std::string in_file = get_arg("file");
std::ifstream in(in_file);
if(!in.good())
{
throw CLI_IO_Error("reading", in_file);
}
const std::string out_file = output_filename(in_file, comp_type);
std::ofstream out(out_file);
if(!in.good())
{
throw CLI_IO_Error("writing", out_file);
}
do_compress(*compress, in, out, get_arg_sz("buf-size"));
}
};
BOTAN_REGISTER_COMMAND("compress", Compress);
class Decompress final : public Command
{
public:
Decompress() : Command("decompress --buf-size=8192 file") {}
void parse_extension(const std::string& in_file,
std::string& out_file,
std::string& suffix)
{
auto last_dot = in_file.find_last_of('.');
if(last_dot == std::string::npos || last_dot == 0)
throw CLI_Error("No extension detected in filename '" + in_file + "'");
out_file = in_file.substr(0, last_dot);
suffix = in_file.substr(last_dot+1, std::string::npos);
}
void go() override
{
const std::string in_file = get_arg("file");
std::string out_file, suffix;
parse_extension(in_file, out_file, suffix);
std::ifstream in(in_file);
if(!in.good())
throw CLI_IO_Error("reading", in_file);
std::unique_ptr<Botan::Transform> decompress;
#if defined(BOTAN_HAS_COMPRESSION)
decompress.reset(Botan::make_decompressor(suffix));
#endif
if(!decompress)
throw CLI_Error_Unsupported("Decompression", suffix);
std::ofstream out(out_file);
if(!out.good())
throw CLI_IO_Error("writing", out_file);
do_compress(*decompress, in, out, get_arg_sz("buf-size"));
}
};
BOTAN_REGISTER_COMMAND("decompress", Decompress);
}
|
