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
|
/*
* anytun
*
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methodes used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007-2009 Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
*
* Anytun 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
* any later version.
*
* Anytun 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 anytun. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef ANYTUN_keyDerivation_h_INCLUDED
#define ANYTUN_keyDerivation_h_INCLUDED
#include "datatypes.h"
#include "buffer.h"
#include "threadUtils.hpp"
#include "syncBuffer.h"
#include "options.h"
#ifndef NO_CRYPT
#ifndef USE_SSL_CRYPTO
#include <gcrypt.h>
#else
#include <openssl/aes.h>
#endif
#endif
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/version.hpp>
#define LABEL_ENC 0
#define LABEL_AUTH 1
#define LABEL_SALT 2
#define LABEL_LEFT_ENC 0x356A192B
#define LABEL_RIGHT_ENC 0xDA4B9237
#define LABEL_LEFT_SALT 0x77DE68DA
#define LABEL_RIGHT_SALT 0x1B645389
#define LABEL_LEFT_AUTH 0xAC3478D6
#define LABEL_RIGHT_AUTH 0xC1DFD96E
typedef enum { KD_INBOUND, KD_OUTBOUND } kd_dir_t;
class KeyDerivation
{
public:
KeyDerivation() : is_initialized_(false), role_(ROLE_LEFT), key_length_(0), master_salt_(0), master_key_(0) {};
KeyDerivation(u_int16_t key_length) : is_initialized_(false), role_(ROLE_LEFT), key_length_(key_length), master_salt_(0), master_key_(0) {};
virtual ~KeyDerivation() {};
void setRole(const role_t role);
virtual void init(Buffer key, Buffer salt, std::string passphrase = "") = 0;
virtual bool generate(kd_dir_t dir, satp_prf_label_t label, seq_nr_t seq_nr, Buffer& key) = 0;
virtual std::string printType() { return "GenericKeyDerivation"; };
satp_prf_label_t convertLabel(kd_dir_t dir, satp_prf_label_t label);
protected:
virtual void updateMasterKey() = 0;
#ifndef NO_PASSPHRASE
void calcMasterKey(std::string passphrase, u_int16_t length);
void calcMasterSalt(std::string passphrase, u_int16_t length);
#endif
KeyDerivation(const KeyDerivation & src);
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive & ar, const unsigned int version)
{
WritersLock lock(mutex_);
ar & role_;
ar & key_length_;
ar & master_salt_;
ar & master_key_;
updateMasterKey();
}
bool is_initialized_;
role_t role_;
u_int16_t key_length_;
SyncBuffer master_salt_;
SyncBuffer master_key_;
SharedMutex mutex_;
};
#if BOOST_VERSION <= 103500
BOOST_IS_ABSTRACT(KeyDerivation);
#else
BOOST_SERIALIZATION_ASSUME_ABSTRACT(KeyDerivation);
#endif
//****** NullKeyDerivation ******
class NullKeyDerivation : public KeyDerivation
{
public:
NullKeyDerivation() {};
~NullKeyDerivation() {};
void init(Buffer key, Buffer salt, std::string passphrase = "") {};
bool generate(kd_dir_t dir, satp_prf_label_t label, seq_nr_t seq_nr, Buffer& key);
std::string printType() { return "NullKeyDerivation"; };
private:
void updateMasterKey() {};
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive & ar, const unsigned int version)
{
ar & boost::serialization::base_object<KeyDerivation>(*this);
}
};
#ifndef NO_CRYPT
//****** AesIcmKeyDerivation ******
class AesIcmKeyDerivation : public KeyDerivation
{
public:
AesIcmKeyDerivation();
AesIcmKeyDerivation(u_int16_t key_length);
~AesIcmKeyDerivation();
static const u_int16_t DEFAULT_KEY_LENGTH = 128;
static const u_int16_t CTR_LENGTH = 16;
static const u_int16_t SALT_LENGTH = 14;
void init(Buffer key, Buffer salt, std::string passphrase = "");
bool generate(kd_dir_t dir, satp_prf_label_t label, seq_nr_t seq_nr, Buffer& key);
std::string printType();
private:
void updateMasterKey();
bool calcCtr(kd_dir_t dir, satp_prf_label_t label, seq_nr_t seq_nr);
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive & ar, const unsigned int version)
{
ar & boost::serialization::base_object<KeyDerivation>(*this);
}
#ifndef USE_SSL_CRYPTO
gcry_cipher_hd_t handle_[2];
#else
AES_KEY aes_key_[2];
u_int8_t ecount_buf_[2][AES_BLOCK_SIZE];
#endif
#ifdef _MSC_VER
#pragma pack(push, 1)
#endif
union ATTR_PACKED key_derivation_aesctr_ctr_union {
u_int8_t buf_[CTR_LENGTH];
struct ATTR_PACKED {
u_int8_t buf_[SALT_LENGTH];
u_int16_t zero_;
} salt_;
struct ATTR_PACKED {
u_int8_t fill_[SALT_LENGTH - sizeof(satp_prf_label_t) - sizeof(seq_nr_t)];
satp_prf_label_t label_;
seq_nr_t seq_;
u_int16_t zero_;
} params_;
} ctr_[2];
#ifdef _MSC_VER
#pragma pack(pop)
#endif
};
#endif
#endif
|
