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
|
/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2010 Tatsuhiro Tsujikawa
*
* 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 2 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
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "MessageDigest.h"
#include <sstream>
#include <iterator>
#include "MessageDigestImpl.h"
#include "util.h"
#include "array_fun.h"
namespace aria2 {
namespace {
struct HashTypeEntry {
std::string hashType;
int strength;
HashTypeEntry(const std::string& hashType, int strength):
hashType(hashType), strength(strength) {}
};
} // namespace
namespace {
HashTypeEntry hashTypes[] = {
HashTypeEntry("sha-1", 1),
HashTypeEntry("sha-224", 2),
HashTypeEntry("sha-256", 3),
HashTypeEntry("sha-384", 4),
HashTypeEntry("sha-512", 5),
HashTypeEntry("md5", 0)
};
} // namespace aria2
MessageDigest::MessageDigest(std::unique_ptr<MessageDigestImpl> impl)
: pImpl_{std::move(impl)}
{}
MessageDigest::~MessageDigest() {}
std::unique_ptr<MessageDigest> MessageDigest::sha1()
{
return make_unique<MessageDigest>(MessageDigestImpl::sha1());
}
std::unique_ptr<MessageDigest> MessageDigest::create
(const std::string& hashType)
{
return make_unique<MessageDigest>(MessageDigestImpl::create(hashType));
}
bool MessageDigest::supports(const std::string& hashType)
{
return MessageDigestImpl::supports(hashType);
}
std::vector<std::string> MessageDigest::getSupportedHashTypes()
{
std::vector<std::string> rv;
for (const auto& i : hashTypes) {
if (MessageDigestImpl::supports(i.hashType)) {
rv.push_back(i.hashType);
}
}
return rv;
}
std::string MessageDigest::getSupportedHashTypeString()
{
auto ht = getSupportedHashTypes();
std::stringstream ss;
std::copy(std::begin(ht), std::end(ht),
std::ostream_iterator<std::string>(ss, ", "));
auto res = ss.str();
if(!res.empty()) {
res.erase(ss.str().length()-2);
}
return res;
}
size_t MessageDigest::getDigestLength(const std::string& hashType)
{
return MessageDigestImpl::getDigestLength(hashType);
}
namespace {
class FindHashTypeEntry {
private:
const std::string& hashType_;
public:
FindHashTypeEntry(const std::string& hashType):hashType_(hashType)
{}
bool operator()(const HashTypeEntry& entry) const
{
return hashType_ == entry.hashType;
}
};
} // namespace
bool MessageDigest::isStronger(const std::string& lhs, const std::string& rhs)
{
auto lEntry = std::find_if(std::begin(hashTypes), std::end(hashTypes),
FindHashTypeEntry(lhs));
auto rEntry = std::find_if(std::begin(hashTypes), std::end(hashTypes),
FindHashTypeEntry(rhs));
if(lEntry == std::end(hashTypes) || rEntry == std::end(hashTypes)) {
return false;
}
return lEntry->strength > rEntry->strength;
}
bool MessageDigest::isValidHash
(const std::string& hashType, const std::string& hexDigest)
{
return util::isHexDigit(hexDigest) &&
supports(hashType) && getDigestLength(hashType)*2 == hexDigest.size();
}
std::string MessageDigest::getCanonicalHashType(const std::string& hashType)
{
// This is really backward compatibility for Metalink3. aria2 only
// supported sha-1, sha-256 and md5 at Metalink3 era. So we don't
// add alias for sha-224, sha-384 and sha-512.
if("sha1" == hashType) {
return "sha-1";
} else if("sha256" == hashType) {
return "sha-256";
} else {
return hashType;
}
}
size_t MessageDigest::getDigestLength() const
{
return pImpl_->getDigestLength();
}
void MessageDigest::reset()
{
pImpl_->reset();
}
MessageDigest& MessageDigest::update(const void* data, size_t length)
{
pImpl_->update(data, length);
return *this;
}
void MessageDigest::digest(unsigned char* md)
{
pImpl_->digest(md);
}
std::string MessageDigest::digest()
{
size_t length = pImpl_->getDigestLength();
auto buf = make_unique<unsigned char[]>(length);
pImpl_->digest(buf.get());
return std::string(&buf[0], &buf[length]);
}
} // namespace aria2
|
