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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef tls_parser_h_
#define tls_parser_h_
#include <cstdint>
#include <cstring>
#include <memory>
#if defined(WIN32) || defined(WIN64)
#include <winsock2.h>
#else
#include <arpa/inet.h>
#endif
#include "databuffer.h"
namespace nss_test {
const uint8_t kTlsChangeCipherSpecType = 20;
const uint8_t kTlsAlertType = 21;
const uint8_t kTlsHandshakeType = 22;
const uint8_t kTlsApplicationDataType = 23;
const uint8_t kTlsHandshakeClientHello = 1;
const uint8_t kTlsHandshakeServerHello = 2;
const uint8_t kTlsHandshakeNewSessionTicket = 4;
const uint8_t kTlsHandshakeHelloRetryRequest = 6;
const uint8_t kTlsHandshakeEncryptedExtensions = 8;
const uint8_t kTlsHandshakeCertificate = 11;
const uint8_t kTlsHandshakeServerKeyExchange = 12;
const uint8_t kTlsHandshakeCertificateRequest = 13;
const uint8_t kTlsHandshakeCertificateVerify = 15;
const uint8_t kTlsHandshakeClientKeyExchange = 16;
const uint8_t kTlsHandshakeFinished = 20;
const uint8_t kTlsAlertWarning = 1;
const uint8_t kTlsAlertFatal = 2;
const uint8_t kTlsAlertCloseNotify = 0;
const uint8_t kTlsAlertEndOfEarlyData = 1;
const uint8_t kTlsAlertUnexpectedMessage = 10;
const uint8_t kTlsAlertBadRecordMac = 20;
const uint8_t kTlsAlertRecordOverflow = 22;
const uint8_t kTlsAlertHandshakeFailure = 40;
const uint8_t kTlsAlertIllegalParameter = 47;
const uint8_t kTlsAlertDecodeError = 50;
const uint8_t kTlsAlertDecryptError = 51;
const uint8_t kTlsAlertProtocolVersion = 70;
const uint8_t kTlsAlertInappropriateFallback = 86;
const uint8_t kTlsAlertMissingExtension = 109;
const uint8_t kTlsAlertUnsupportedExtension = 110;
const uint8_t kTlsAlertUnrecognizedName = 112;
const uint8_t kTlsAlertNoApplicationProtocol = 120;
const uint8_t kTlsFakeChangeCipherSpec[] = {
kTlsChangeCipherSpecType, // Type
0xfe,
0xff, // Version
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x10, // Fictitious sequence #
0x00,
0x01, // Length
0x01 // Value
};
static const uint8_t kTls13PskKe = 0;
static const uint8_t kTls13PskDhKe = 1;
static const uint8_t kTls13PskAuth = 0;
static const uint8_t kTls13PskSignAuth = 1;
inline bool IsDtls(uint16_t version) { return (version & 0x8000) == 0x8000; }
inline uint16_t NormalizeTlsVersion(uint16_t version) {
if (version == 0xfeff) {
return 0x0302; // special: DTLS 1.0 == TLS 1.1
}
if (IsDtls(version)) {
return (version ^ 0xffff) + 0x0201;
}
return version;
}
inline uint16_t TlsVersionToDtlsVersion(uint16_t version) {
if (version == 0x0302) {
return 0xfeff;
}
if (version == 0x0304) {
return version;
}
return 0xffff - version + 0x0201;
}
inline size_t WriteVariable(DataBuffer* target, size_t index,
const DataBuffer& buf, size_t len_size) {
index = target->Write(index, static_cast<uint32_t>(buf.len()), len_size);
return target->Write(index, buf.data(), buf.len());
}
class TlsParser {
public:
TlsParser(const uint8_t* data, size_t len) : buffer_(data, len), offset_(0) {}
explicit TlsParser(const DataBuffer& buf) : buffer_(buf), offset_(0) {}
bool Read(uint8_t* val);
// Read an integral type of specified width.
bool Read(uint32_t* val, size_t size);
// Reads len bytes into dest buffer, overwriting it.
bool Read(DataBuffer* dest, size_t len);
// Reads bytes into dest buffer, overwriting it. The number of bytes is
// determined by reading from len_size bytes from the stream first.
bool ReadVariable(DataBuffer* dest, size_t len_size);
bool Skip(size_t len);
bool SkipVariable(size_t len_size);
size_t consumed() const { return offset_; }
size_t remaining() const { return buffer_.len() - offset_; }
private:
void consume(size_t len) { offset_ += len; }
const uint8_t* ptr() const { return buffer_.data() + offset_; }
DataBuffer buffer_;
size_t offset_;
};
} // namespace nss_test
#endif
|
