/src/botan/build/include/botan/internal/tls_handshake_io.h
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * TLS Handshake Serialization |
3 | | * (C) 2012,2014 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #ifndef BOTAN_TLS_HANDSHAKE_IO_H_ |
9 | | #define BOTAN_TLS_HANDSHAKE_IO_H_ |
10 | | |
11 | | #include <botan/tls_magic.h> |
12 | | #include <botan/tls_version.h> |
13 | | #include <functional> |
14 | | #include <vector> |
15 | | #include <deque> |
16 | | #include <map> |
17 | | #include <set> |
18 | | #include <utility> |
19 | | |
20 | | namespace Botan { |
21 | | |
22 | | namespace TLS { |
23 | | |
24 | | class Handshake_Message; |
25 | | |
26 | | /** |
27 | | * Handshake IO Interface |
28 | | */ |
29 | | class Handshake_IO |
30 | | { |
31 | | public: |
32 | | virtual Protocol_Version initial_record_version() const = 0; |
33 | | |
34 | | virtual std::vector<uint8_t> send(const Handshake_Message& msg) = 0; |
35 | | |
36 | | virtual std::vector<uint8_t> send_under_epoch(const Handshake_Message& msg, uint16_t epoch) = 0; |
37 | | |
38 | | virtual bool timeout_check() = 0; |
39 | | |
40 | | virtual std::vector<uint8_t> format( |
41 | | const std::vector<uint8_t>& handshake_msg, |
42 | | Handshake_Type handshake_type) const = 0; |
43 | | |
44 | | virtual void add_record(const uint8_t record[], |
45 | | size_t record_len, |
46 | | Record_Type type, |
47 | | uint64_t sequence_number) = 0; |
48 | | |
49 | | /** |
50 | | * Returns (HANDSHAKE_NONE, std::vector<>()) if no message currently available |
51 | | */ |
52 | | virtual std::pair<Handshake_Type, std::vector<uint8_t>> |
53 | | get_next_record(bool expecting_ccs) = 0; |
54 | | |
55 | 47.6k | Handshake_IO() = default; |
56 | | |
57 | | Handshake_IO(const Handshake_IO&) = delete; |
58 | | |
59 | | Handshake_IO& operator=(const Handshake_IO&) = delete; |
60 | | |
61 | 47.6k | virtual ~Handshake_IO() = default; |
62 | | }; |
63 | | |
64 | | /** |
65 | | * Handshake IO for stream-based handshakes |
66 | | */ |
67 | | class Stream_Handshake_IO final : public Handshake_IO |
68 | | { |
69 | | public: |
70 | | typedef std::function<void (uint8_t, const std::vector<uint8_t>&)> writer_fn; |
71 | | |
72 | 47.0k | explicit Stream_Handshake_IO(writer_fn writer) : m_send_hs(writer) {} |
73 | | |
74 | | Protocol_Version initial_record_version() const override; |
75 | | |
76 | 0 | bool timeout_check() override { return false; } |
77 | | |
78 | | std::vector<uint8_t> send(const Handshake_Message& msg) override; |
79 | | |
80 | | std::vector<uint8_t> send_under_epoch(const Handshake_Message& msg, uint16_t epoch) override; |
81 | | |
82 | | std::vector<uint8_t> format( |
83 | | const std::vector<uint8_t>& handshake_msg, |
84 | | Handshake_Type handshake_type) const override; |
85 | | |
86 | | void add_record(const uint8_t record[], |
87 | | size_t record_len, |
88 | | Record_Type type, |
89 | | uint64_t sequence_number) override; |
90 | | |
91 | | std::pair<Handshake_Type, std::vector<uint8_t>> |
92 | | get_next_record(bool expecting_ccs) override; |
93 | | private: |
94 | | std::deque<uint8_t> m_queue; |
95 | | writer_fn m_send_hs; |
96 | | }; |
97 | | |
98 | | /** |
99 | | * Handshake IO for datagram-based handshakes |
100 | | */ |
101 | | class Datagram_Handshake_IO final : public Handshake_IO |
102 | | { |
103 | | public: |
104 | | typedef std::function<void (uint16_t, uint8_t, const std::vector<uint8_t>&)> writer_fn; |
105 | | |
106 | | Datagram_Handshake_IO(writer_fn writer, |
107 | | class Connection_Sequence_Numbers& seq, |
108 | | uint16_t mtu, uint64_t initial_timeout_ms, uint64_t max_timeout_ms) : |
109 | | m_seqs(seq), |
110 | | m_flights(1), |
111 | | m_initial_timeout(initial_timeout_ms), |
112 | | m_max_timeout(max_timeout_ms), |
113 | | m_send_hs(writer), |
114 | | m_mtu(mtu) |
115 | 578 | {} |
116 | | |
117 | | Protocol_Version initial_record_version() const override; |
118 | | |
119 | | bool timeout_check() override; |
120 | | |
121 | | std::vector<uint8_t> send(const Handshake_Message& msg) override; |
122 | | |
123 | | std::vector<uint8_t> send_under_epoch(const Handshake_Message& msg, uint16_t epoch) override; |
124 | | |
125 | | std::vector<uint8_t> format( |
126 | | const std::vector<uint8_t>& handshake_msg, |
127 | | Handshake_Type handshake_type) const override; |
128 | | |
129 | | void add_record(const uint8_t record[], |
130 | | size_t record_len, |
131 | | Record_Type type, |
132 | | uint64_t sequence_number) override; |
133 | | |
134 | | std::pair<Handshake_Type, std::vector<uint8_t>> |
135 | | get_next_record(bool expecting_ccs) override; |
136 | | private: |
137 | | void retransmit_flight(size_t flight); |
138 | | void retransmit_last_flight(); |
139 | | |
140 | | std::vector<uint8_t> format_fragment( |
141 | | const uint8_t fragment[], |
142 | | size_t fragment_len, |
143 | | uint16_t frag_offset, |
144 | | uint16_t msg_len, |
145 | | Handshake_Type type, |
146 | | uint16_t msg_sequence) const; |
147 | | |
148 | | std::vector<uint8_t> format_w_seq( |
149 | | const std::vector<uint8_t>& handshake_msg, |
150 | | Handshake_Type handshake_type, |
151 | | uint16_t msg_sequence) const; |
152 | | |
153 | | std::vector<uint8_t> send_message(uint16_t msg_seq, uint16_t epoch, |
154 | | Handshake_Type msg_type, |
155 | | const std::vector<uint8_t>& msg); |
156 | | |
157 | | class Handshake_Reassembly final |
158 | | { |
159 | | public: |
160 | | void add_fragment(const uint8_t fragment[], |
161 | | size_t fragment_length, |
162 | | size_t fragment_offset, |
163 | | uint16_t epoch, |
164 | | uint8_t msg_type, |
165 | | size_t msg_length); |
166 | | |
167 | | bool complete() const; |
168 | | |
169 | 0 | uint16_t epoch() const { return m_epoch; } |
170 | | |
171 | | std::pair<Handshake_Type, std::vector<uint8_t>> message() const; |
172 | | private: |
173 | | uint8_t m_msg_type = HANDSHAKE_NONE; |
174 | | size_t m_msg_length = 0; |
175 | | uint16_t m_epoch = 0; |
176 | | |
177 | | // vector<bool> m_seen; |
178 | | // vector<uint8_t> m_fragments |
179 | | std::map<size_t, uint8_t> m_fragments; |
180 | | std::vector<uint8_t> m_message; |
181 | | }; |
182 | | |
183 | | struct Message_Info final |
184 | | { |
185 | | Message_Info(uint16_t e, Handshake_Type mt, const std::vector<uint8_t>& msg) : |
186 | 0 | epoch(e), msg_type(mt), msg_bits(msg) {} |
187 | | |
188 | 0 | Message_Info() : epoch(0xFFFF), msg_type(HANDSHAKE_NONE) {} |
189 | | |
190 | | uint16_t epoch; |
191 | | Handshake_Type msg_type; |
192 | | std::vector<uint8_t> msg_bits; |
193 | | }; |
194 | | |
195 | | class Connection_Sequence_Numbers& m_seqs; |
196 | | std::map<uint16_t, Handshake_Reassembly> m_messages; |
197 | | std::set<uint16_t> m_ccs_epochs; |
198 | | std::vector<std::vector<uint16_t>> m_flights; |
199 | | std::map<uint16_t, Message_Info> m_flight_data; |
200 | | |
201 | | uint64_t m_initial_timeout = 0; |
202 | | uint64_t m_max_timeout = 0; |
203 | | |
204 | | uint64_t m_last_write = 0; |
205 | | uint64_t m_next_timeout = 0; |
206 | | |
207 | | uint16_t m_in_message_seq = 0; |
208 | | uint16_t m_out_message_seq = 0; |
209 | | |
210 | | writer_fn m_send_hs; |
211 | | uint16_t m_mtu; |
212 | | }; |
213 | | |
214 | | } |
215 | | |
216 | | } |
217 | | |
218 | | #endif |