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
205
206
207
|
/*
* (C) 2016 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "cli.h"
#if defined(BOTAN_HAS_TLS)
#include <botan/tls_policy.h>
#include <botan/tls_version.h>
#include <botan/tls_messages.h>
#include <botan/hex.h>
#include <sstream>
#include "tls_helpers.h"
namespace Botan_CLI {
class TLS_Ciphersuites final : public Command
{
public:
TLS_Ciphersuites()
: Command("tls_ciphers --policy=default --version=tls1.2") {}
static Botan::TLS::Protocol_Version::Version_Code tls_version_from_str(const std::string& str)
{
if(str == "tls1.2" || str == "TLS1.2" || str == "TLS-1.2")
{
return Botan::TLS::Protocol_Version::TLS_V12;
}
else if(str == "tls1.1" || str == "TLS1.1" || str == "TLS-1.1")
{
return Botan::TLS::Protocol_Version::TLS_V11;
}
else if(str == "tls1.0" || str == "TLS1.1" || str == "TLS-1.1")
{
return Botan::TLS::Protocol_Version::TLS_V10;
}
if(str == "dtls1.2" || str == "DTLS1.2" || str == "DTLS-1.2")
{
return Botan::TLS::Protocol_Version::DTLS_V12;
}
else if(str == "dtls1.0" || str == "DTLS1.0" || str == "DTLS-1.0")
{
return Botan::TLS::Protocol_Version::DTLS_V10;
}
else
{
throw CLI_Error("Unknown TLS version '" + str + "'");
}
}
std::string group() const override
{
return "tls";
}
std::string description() const override
{
return "Lists all ciphersuites for a policy and TLS version";
}
void go() override
{
const std::string policy_type = get_arg("policy");
const Botan::TLS::Protocol_Version version(tls_version_from_str(get_arg("version")));
const bool with_srp = false; // fixme
auto policy = load_tls_policy(policy_type);
if(policy->acceptable_protocol_version(version) == false)
{
error_output() << "Error: the policy specified does not allow the given TLS version\n";
return;
}
for(uint16_t suite_id : policy->ciphersuite_list(version, with_srp))
{
const Botan::TLS::Ciphersuite suite(Botan::TLS::Ciphersuite::by_id(suite_id));
output() << suite.to_string() << "\n";
}
}
};
BOTAN_REGISTER_COMMAND("tls_ciphers", TLS_Ciphersuites);
class TLS_Client_Hello_Reader final : public Command
{
public:
TLS_Client_Hello_Reader()
: Command("tls_client_hello --hex input") {}
std::string group() const override
{
return "tls";
}
std::string description() const override
{
return "Parse a TLS client hello message";
}
void go() override
{
const std::string input_file = get_arg("input");
std::vector<uint8_t> input;
if(flag_set("hex"))
{
input = Botan::hex_decode(slurp_file_as_str(input_file));
}
else
{
input = slurp_file(input_file);
}
if(input.size() < 45)
{
error_output() << "Input too short to be valid\n";
return;
}
// Input also contains the record layer header, strip it
if(input[0] == 22)
{
const size_t len = Botan::make_uint16(input[3], input[4]);
if(input.size() != len + 5)
{
error_output() << "Record layer length invalid\n";
return;
}
input = std::vector<uint8_t>(input.begin() + 5, input.end());
}
// Assume the handshake header is there, strip it
if(input[0] == 1)
{
const size_t hs_len = Botan::make_uint32(0, input[1], input[2], input[3]);
if(input.size() != hs_len + 4)
{
error_output() << "Handshake layer length invalid\n";
return;
}
input = std::vector<uint8_t>(input.begin() + 4, input.end());
}
try
{
Botan::TLS::Client_Hello hello(input);
output() << format_hello(hello);
}
catch(std::exception& e)
{
error_output() << "Parsing client hello failed: " << e.what() << "\n";
}
}
private:
std::string format_hello(const Botan::TLS::Client_Hello& hello)
{
std::ostringstream oss;
oss << "Version: " << hello.version().to_string() << "\n"
<< "Random: " << Botan::hex_encode(hello.random()) << "\n";
if(!hello.session_id().empty())
oss << "SessionID: " << Botan::hex_encode(hello.session_id()) << "\n";
for(uint16_t csuite_id : hello.ciphersuites())
oss << "Cipher: " << Botan::TLS::Ciphersuite::by_id(csuite_id).to_string() << "\n";
oss << "Supported signature schemes: ";
if(hello.signature_schemes().empty())
{
oss << "Did not send signature_algorithms extension\n";
}
else
{
for(Botan::TLS::Signature_Scheme scheme : hello.signature_schemes())
oss << sig_scheme_to_string(scheme) << " ";
oss << "\n";
}
std::map<std::string, bool> hello_flags;
hello_flags["ALPN"] = hello.supports_alpn();
hello_flags["Encrypt Then Mac"] = hello.supports_encrypt_then_mac();
hello_flags["Extended Master Secret"] = hello.supports_extended_master_secret();
hello_flags["Session Ticket"] = hello.supports_session_ticket();
for(auto&& i : hello_flags)
oss << "Supports " << i.first << "? " << (i.second ? "yes" : "no") << "\n";
return oss.str();
}
};
BOTAN_REGISTER_COMMAND("tls_client_hello", TLS_Client_Hello_Reader);
}
#endif
|
