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
|
/*
* TLS Handshake Serialization
* (C) 2012 Jack Lloyd
*
* Released under the terms of the Botan license
*/
#ifndef BOTAN_TLS_HANDSHAKE_IO_H__
#define BOTAN_TLS_HANDSHAKE_IO_H__
#include <botan/tls_magic.h>
#include <botan/tls_version.h>
#include <botan/loadstor.h>
#include <functional>
#include <vector>
#include <deque>
#include <map>
#include <set>
#include <utility>
namespace Botan {
namespace TLS {
class Handshake_Message;
typedef std::function<void (byte, const std::vector<byte>&)> handshake_write_fn;
/**
* Handshake IO Interface
*/
class Handshake_IO
{
public:
virtual Protocol_Version initial_record_version() const = 0;
virtual std::vector<byte> send(const Handshake_Message& msg) = 0;
virtual std::vector<byte> format(
const std::vector<byte>& handshake_msg,
Handshake_Type handshake_type) const = 0;
virtual void add_input(byte record_type,
const byte record[],
size_t record_size,
u64bit record_number) = 0;
/**
* Returns (HANDSHAKE_NONE, std::vector<>()) if no message currently available
*/
virtual std::pair<Handshake_Type, std::vector<byte>>
get_next_record(bool expecting_ccs) = 0;
Handshake_IO() {}
Handshake_IO(const Handshake_IO&) = delete;
Handshake_IO& operator=(const Handshake_IO&) = delete;
virtual ~Handshake_IO() {}
};
/**
* Handshake IO for stream-based handshakes
*/
class Stream_Handshake_IO : public Handshake_IO
{
public:
Stream_Handshake_IO(handshake_write_fn writer) :
m_writer(writer) {}
Protocol_Version initial_record_version() const override;
std::vector<byte> send(const Handshake_Message& msg) override;
std::vector<byte> format(
const std::vector<byte>& handshake_msg,
Handshake_Type handshake_type) const override;
void add_input(byte record_type,
const byte record[],
size_t record_size,
u64bit record_number) override;
std::pair<Handshake_Type, std::vector<byte>>
get_next_record(bool expecting_ccs) override;
private:
std::deque<byte> m_queue;
handshake_write_fn m_writer;
};
/**
* Handshake IO for datagram-based handshakes
*/
class Datagram_Handshake_IO : public Handshake_IO
{
public:
Datagram_Handshake_IO(handshake_write_fn writer, u16bit mtu) :
m_flights(1), m_mtu(mtu), m_writer(writer) {}
Protocol_Version initial_record_version() const override;
std::vector<byte> send(const Handshake_Message& msg) override;
std::vector<byte> format(
const std::vector<byte>& handshake_msg,
Handshake_Type handshake_type) const override;
void add_input(const byte rec_type,
const byte record[],
size_t record_size,
u64bit record_number) override;
std::pair<Handshake_Type, std::vector<byte>>
get_next_record(bool expecting_ccs) override;
private:
std::vector<byte> format_fragment(
const byte fragment[],
size_t fragment_len,
u16bit frag_offset,
u16bit msg_len,
Handshake_Type type,
u16bit msg_sequence) const;
std::vector<byte> format_w_seq(
const std::vector<byte>& handshake_msg,
Handshake_Type handshake_type,
u16bit msg_sequence) const;
class Handshake_Reassembly
{
public:
void add_fragment(const byte fragment[],
size_t fragment_length,
size_t fragment_offset,
u16bit epoch,
byte msg_type,
size_t msg_length);
bool complete() const;
u16bit epoch() const { return m_epoch; }
std::pair<Handshake_Type, std::vector<byte>> message() const;
private:
byte m_msg_type = HANDSHAKE_NONE;
size_t m_msg_length = 0;
u16bit m_epoch = 0;
std::map<size_t, byte> m_fragments;
std::vector<byte> m_message;
};
std::map<u16bit, Handshake_Reassembly> m_messages;
std::set<u16bit> m_ccs_epochs;
std::vector<std::vector<u16bit>> m_flights;
u16bit m_mtu = 0;
u16bit m_in_message_seq = 0;
u16bit m_out_message_seq = 0;
handshake_write_fn m_writer;
};
}
}
#endif
|
