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
|
//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002-2013 Vincent Richard <[email protected]>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 3 of
// the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Linking this library statically or dynamically with other modules is making
// a combined work based on this library. Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//
#include "vmime/charsetConverter_idna.hpp"
#include "vmime/exception.hpp"
#include "vmime/utility/stringUtils.hpp"
#include "vmime/utility/streamUtils.hpp"
#include "vmime/utility/outputStreamStringAdapter.hpp"
extern "C"
{
#include "contrib/punycode/punycode.h"
#include "contrib/punycode/punycode.c"
}
#include "contrib/utf8/utf8.h"
namespace vmime
{
charsetConverter_idna::charsetConverter_idna
(const charset& source, const charset& dest, const charsetConverterOptions& opts)
: m_source(source), m_dest(dest), m_options(opts)
{
}
charsetConverter_idna::~charsetConverter_idna()
{
}
void charsetConverter_idna::convert(utility::inputStream& in, utility::outputStream& out)
{
// IDNA should be used for short strings, so it does not matter if we
// do not work directly on the stream
string inStr;
vmime::utility::outputStreamStringAdapter os(inStr);
vmime::utility::bufferedStreamCopy(in, os);
string outStr;
convert(inStr, outStr);
out << outStr;
}
void charsetConverter_idna::convert(const string& in, string& out)
{
if (m_source == m_dest)
{
// No conversion needed
out = in;
return;
}
out.clear();
if (m_dest == "idna")
{
if (utility::stringUtils::is7bit(in))
{
// No need to encode as Punycode
out = in;
return;
}
string inUTF8;
charset::convert(in, inUTF8, m_source, vmime::charsets::UTF_8);
const string::value_type* ch = inUTF8.c_str();
const string::value_type* end = inUTF8.c_str() + inUTF8.length();
std::vector <punycode_uint> unichars;
unichars.reserve(inUTF8.length());
while (ch < end)
{
const utf8::uint32_t uc = utf8::unchecked::next(ch);
unichars.push_back(uc);
}
std::vector <char> output(inUTF8.length() * 2);
punycode_uint outputLen = output.size();
const punycode_status status = punycode_encode
(unichars.size(), &unichars[0], /* case_flags */ NULL, &outputLen, &output[0]);
if (status == punycode_success)
{
out = string("xn--") + string(output.begin(), output.begin() + outputLen);
}
else
{
// TODO
}
}
else if (m_source == "idna")
{
if (in.length() < 5 || in.substr(0, 4) != "xn--")
{
// Not an IDNA string
out = in;
return;
}
std::vector <punycode_uint> output(in.length() - 4);
punycode_uint outputLen = output.size();
const punycode_status status = punycode_decode
(in.length() - 4, &in[4], &outputLen, &output[0], /* case_flags */ NULL);
if (status == punycode_success)
{
std::vector <string::value_type> outUTF8Bytes(outputLen * 4);
string::value_type* p = &outUTF8Bytes[0];
for (std::vector <punycode_uint>::const_iterator it = output.begin() ;
it != output.begin() + outputLen ; ++it)
{
p = utf8::unchecked::append(*it, p);
}
string outUTF8(&outUTF8Bytes[0], p);
charset::convert(outUTF8, out, vmime::charsets::UTF_8, m_dest);
}
else
{
// TODO
}
}
}
shared_ptr <utility::charsetFilteredOutputStream> charsetConverter_idna::getFilteredOutputStream(utility::outputStream& /* os */)
{
return null;
}
} // vmime
|
