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
|
/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2014 Daniel Vassdal <shutter@canternet.org>
*
* This file is part of InspIRCd. InspIRCd 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, version 2.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "modules/hash.h"
// Format:
// Iterations:B64(Hash):B64(Salt)
// E.g.
// 10200:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA:BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
class PBKDF2Hash
{
public:
unsigned int iterations;
unsigned int length;
std::string salt;
std::string hash;
PBKDF2Hash(unsigned int itr, unsigned int dkl, const std::string& slt, const std::string& hsh = "")
: iterations(itr), length(dkl), salt(slt), hash(hsh)
{
}
PBKDF2Hash(const std::string& data)
{
irc::sepstream ss(data, ':');
std::string tok;
ss.GetToken(tok);
this->iterations = ConvToInt(tok);
ss.GetToken(tok);
this->hash = Base64ToBin(tok);
ss.GetToken(tok);
this->salt = Base64ToBin(tok);
this->length = this->hash.length();
}
std::string ToString()
{
if (!IsValid())
return "";
return ConvToStr(this->iterations) + ":" + BinToBase64(this->hash) + ":" + BinToBase64(this->salt);
}
bool IsValid()
{
if (!this->iterations || !this->length || this->salt.empty() || this->hash.empty())
return false;
return true;
}
};
class PBKDF2Provider : public HashProvider
{
public:
HashProvider* provider;
unsigned int iterations;
unsigned int dkey_length;
std::string PBKDF2(const std::string& pass, const std::string& salt, unsigned int itr = 0, unsigned int dkl = 0)
{
size_t blocks = std::ceil((double)dkl / provider->out_size);
std::string output;
std::string tmphash;
std::string salt_block = salt;
for (size_t block = 1; block <= blocks; block++)
{
char salt_data[4];
for (size_t i = 0; i < sizeof(salt_data); i++)
salt_data[i] = block >> (24 - i * 8) & 0x0F;
salt_block.erase(salt.length());
salt_block.append(salt_data, sizeof(salt_data));
std::string blockdata = provider->hmac(pass, salt_block);
std::string lasthash = blockdata;
for (size_t iter = 1; iter < itr; iter++)
{
tmphash = provider->hmac(pass, lasthash);
for (size_t i = 0; i < provider->out_size; i++)
blockdata[i] ^= tmphash[i];
lasthash.swap(tmphash);
}
output += blockdata;
}
output.erase(dkl);
return output;
}
std::string GenerateRaw(const std::string& data) CXX11_OVERRIDE
{
PBKDF2Hash hs(this->iterations, this->dkey_length, ServerInstance->GenRandomStr(dkey_length, false));
hs.hash = PBKDF2(data, hs.salt, this->iterations, this->dkey_length);
return hs.ToString();
}
bool Compare(const std::string& input, const std::string& hash) CXX11_OVERRIDE
{
PBKDF2Hash hs(hash);
if (!hs.IsValid())
return false;
std::string cmp = PBKDF2(input, hs.salt, hs.iterations, hs.length);
return (cmp == hs.hash);
}
std::string ToPrintable(const std::string& raw) CXX11_OVERRIDE
{
return raw;
}
PBKDF2Provider(Module* mod, HashProvider* hp)
: HashProvider(mod, "pbkdf2-hmac-" + hp->name.substr(hp->name.find('/') + 1))
, provider(hp)
{
DisableAutoRegister();
}
};
class ModulePBKDF2 : public Module
{
std::vector<PBKDF2Provider*> providers;
void GetConfig()
{
// First set the common values
ConfigTag* tag = ServerInstance->Config->ConfValue("pbkdf2");
unsigned int global_iterations = tag->getInt("iterations", 12288, 1);
unsigned int global_dkey_length = tag->getInt("length", 32, 1, 1024);
for (std::vector<PBKDF2Provider*>::iterator i = providers.begin(); i != providers.end(); ++i)
{
PBKDF2Provider* pi = *i;
pi->iterations = global_iterations;
pi->dkey_length = global_dkey_length;
}
// Then the specific values
ConfigTagList tags = ServerInstance->Config->ConfTags("pbkdf2prov");
for (ConfigIter i = tags.first; i != tags.second; ++i)
{
tag = i->second;
std::string hash_name = "hash/" + tag->getString("hash");
for (std::vector<PBKDF2Provider*>::iterator j = providers.begin(); j != providers.end(); ++j)
{
PBKDF2Provider* pi = *j;
if (pi->provider->name != hash_name)
continue;
pi->iterations = tag->getInt("iterations", global_iterations, 1);
pi->dkey_length = tag->getInt("length", global_dkey_length, 1, 1024);
}
}
}
public:
~ModulePBKDF2()
{
stdalgo::delete_all(providers);
}
void OnServiceAdd(ServiceProvider& provider) CXX11_OVERRIDE
{
// Check if it's a hash provider
if (provider.name.compare(0, 5, "hash/"))
return;
HashProvider* hp = static_cast<HashProvider*>(&provider);
if (hp->IsKDF())
return;
PBKDF2Provider* prov = new PBKDF2Provider(this, hp);
providers.push_back(prov);
ServerInstance->Modules.AddService(*prov);
GetConfig();
}
void OnServiceDel(ServiceProvider& prov) CXX11_OVERRIDE
{
for (std::vector<PBKDF2Provider*>::iterator i = providers.begin(); i != providers.end(); ++i)
{
PBKDF2Provider* item = *i;
if (item->provider != &prov)
continue;
ServerInstance->Modules->DelService(*item);
delete item;
providers.erase(i);
break;
}
}
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
GetConfig();
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Implements PBKDF2 hashing", VF_VENDOR);
}
};
MODULE_INIT(ModulePBKDF2)
|
