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
|
// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
// Parse the tls-version-min option.
#pragma once
#include <string>
#include <openvpn/common/size.hpp>
#include <openvpn/common/exception.hpp>
#include <openvpn/common/options.hpp>
namespace openvpn::TLSVersion {
enum class Type
{
UNDEF,
V1_0,
V1_1,
V1_2,
V1_3
};
inline bool operator<(const Type &A, const Type &B)
{
return static_cast<int>(A) < static_cast<int>(B);
}
inline const std::string to_string(const Type version)
{
switch (version)
{
case Type::UNDEF:
return "UNDEF";
case Type::V1_0:
return "V1_0";
case Type::V1_1:
return "V1_1";
case Type::V1_2:
return "V1_2";
case Type::V1_3:
return "V1_3";
default:
return "???";
}
}
inline Type parse_tls_version_min(const std::string &ver,
const bool or_highest,
const Type max_version)
{
if (ver == "1.0" && Type::V1_0 <= max_version)
return Type::V1_0;
else if (ver == "1.1" && Type::V1_1 <= max_version)
return Type::V1_1;
else if (ver == "1.2" && Type::V1_2 <= max_version)
return Type::V1_2;
else if (ver == "1.3" && Type::V1_3 <= max_version)
return Type::V1_3;
else if (or_highest)
return max_version;
else
throw option_error(ERR_INVALID_OPTION_CRYPTO, "tls-version-min: unrecognized TLS version");
}
inline Type parse_tls_version_min(const OptionList &opt,
const std::string &relay_prefix,
const Type max_version)
{
const Option *o = opt.get_ptr(relay_prefix + "tls-version-min");
if (o)
{
const std::string ver = o->get_optional(1, 16);
const bool or_highest = (o->get_optional(2, 16) == "or-highest");
return parse_tls_version_min(ver, or_highest, max_version);
}
return Type::UNDEF;
}
inline void apply_override(Type &tvm, const std::string &override)
{
const Type orig = tvm;
Type newtvm = Type::UNDEF;
if (override.empty() || override == "default")
newtvm = tvm;
else if (override == "disabled")
tvm = Type::UNDEF;
else if (override == "tls_1_0")
newtvm = Type::V1_0;
else if (override == "tls_1_1")
newtvm = Type::V1_1;
else if (override == "tls_1_2")
newtvm = Type::V1_2;
else if (override == "tls_1_3")
newtvm = Type::V1_3;
else
throw option_error(ERR_INVALID_OPTION_CRYPTO, "tls-version-min: unrecognized override string");
if (newtvm > orig || newtvm == Type::UNDEF)
tvm = newtvm;
// OPENVPN_LOG("*** TLS-version-min before=" << to_string(orig) << " override=" << override << " after=" << to_string(tvm)); // fixme
}
} // namespace openvpn::TLSVersion
|
