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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
#include <botan/botan.h>
#include <botan/tls_client.h>
#include <botan/pkcs8.h>
#include <botan/hex.h>
#include <stdio.h>
#include <string>
#include <iostream>
#include <memory>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
#include <botan/tls_session_manager_sqlite.h>
#endif
#include "credentials.h"
using namespace Botan;
using namespace std::placeholders;
int connect_to_host(const std::string& host, u16bit port, const std::string& transport)
{
hostent* host_addr = ::gethostbyname(host.c_str());
if(host_addr == 0)
throw std::runtime_error("gethostbyname failed for " + host);
if(host_addr->h_addrtype != AF_INET) // FIXME
throw std::runtime_error(host + " has IPv6 address");
int type = (transport == "tcp") ? SOCK_STREAM : SOCK_DGRAM;
int fd = ::socket(PF_INET, type, 0);
if(fd == -1)
throw std::runtime_error("Unable to acquire socket");
sockaddr_in socket_info;
::memset(&socket_info, 0, sizeof(socket_info));
socket_info.sin_family = AF_INET;
socket_info.sin_port = htons(port);
::memcpy(&socket_info.sin_addr,
host_addr->h_addr,
host_addr->h_length);
socket_info.sin_addr = *(struct in_addr*)host_addr->h_addr; // FIXME
if(::connect(fd, (sockaddr*)&socket_info, sizeof(struct sockaddr)) != 0)
{
::close(fd);
throw std::runtime_error("connect failed");
}
return fd;
}
bool handshake_complete(const TLS::Session& session)
{
std::cout << "Handshake complete, " << session.version().to_string()
<< " using " << session.ciphersuite().to_string() << "\n";
if(!session.session_id().empty())
std::cout << "Session ID " << hex_encode(session.session_id()) << "\n";
if(!session.session_ticket().empty())
std::cout << "Session ticket " << hex_encode(session.session_ticket()) << "\n";
return true;
}
void dgram_socket_write(int sockfd, const byte buf[], size_t length)
{
send(sockfd, buf, length, MSG_NOSIGNAL);
}
void stream_socket_write(int sockfd, const byte buf[], size_t length)
{
size_t offset = 0;
while(length)
{
ssize_t sent = ::send(sockfd, (const char*)buf + offset,
length, MSG_NOSIGNAL);
if(sent == -1)
{
if(errno == EINTR)
sent = 0;
else
throw std::runtime_error("Socket::write: Socket write failed");
}
offset += sent;
length -= sent;
}
}
bool got_alert = false;
void process_data(const byte buf[], size_t buf_size, TLS::Alert alert)
{
if(alert.is_valid())
{
std::cout << "Alert: " << alert.type_string() << "\n";
got_alert = true;
}
for(size_t i = 0; i != buf_size; ++i)
{
std::cout << buf[i];
}
}
std::string protocol_chooser(const std::vector<std::string>& protocols)
{
for(size_t i = 0; i != protocols.size(); ++i)
std::cout << "Protocol " << i << " = " << protocols[i] << "\n";
return "http/1.1";
}
int main(int argc, char* argv[])
{
if(argc != 2 && argc != 3 && argc != 4)
{
std::cout << "Usage " << argv[0] << " host [port] [udp|tcp]\n";
return 1;
}
try
{
LibraryInitializer botan_init;
AutoSeeded_RNG rng;
TLS::Policy policy;
#if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
TLS::Session_Manager_SQLite session_manager("my secret passphrase",
rng,
"sessions.db");
#else
TLS::Session_Manager_In_Memory session_manager;
#endif
Credentials_Manager_Simple creds(rng);
std::string host = argv[1];
u32bit port = argc >= 3 ? Botan::to_u32bit(argv[2]) : 443;
std::string transport = argc >= 4 ? argv[3] : "tcp";
int sockfd = connect_to_host(host, port, transport);
auto socket_write =
(transport == "tcp") ?
std::bind(stream_socket_write, sockfd, _1, _2) :
std::bind(dgram_socket_write, sockfd, _1, _2);
TLS::Client client(socket_write,
process_data,
handshake_complete,
session_manager,
creds,
policy,
rng,
host,
port,
protocol_chooser);
while(!client.is_closed())
{
fd_set readfds;
FD_ZERO(&readfds);
FD_SET(sockfd, &readfds);
FD_SET(STDIN_FILENO, &readfds);
::select(sockfd + 1, &readfds, NULL, NULL, NULL);
if(FD_ISSET(sockfd, &readfds))
{
byte buf[4*1024] = { 0 };
ssize_t got = ::read(sockfd, buf, sizeof(buf));
if(got == 0)
{
std::cout << "EOF on socket\n";
break;
}
else if(got == -1)
{
std::cout << "Socket error: " << errno << " " << strerror(errno) << "\n";
continue;
}
//std::cout << "Socket - got " << got << " bytes\n";
client.received_data(buf, got);
}
else if(FD_ISSET(STDIN_FILENO, &readfds))
{
byte buf[1024] = { 0 };
ssize_t got = read(STDIN_FILENO, buf, sizeof(buf));
if(got == 0)
{
std::cout << "EOF on stdin\n";
client.close();
break;
}
else if(got == -1)
{
std::cout << "Stdin error: " << errno << " " << strerror(errno) << "\n";
continue;
}
if(got == 2 && buf[1] == '\n')
{
char cmd = buf[0];
if(cmd == 'R' || cmd == 'r')
{
std::cout << "Client initiated renegotiation\n";
client.renegotiate(cmd == 'R');
}
else if(cmd == 'Q')
{
std::cout << "Client initiated close\n";
client.close();
}
}
else if(buf[0] == 'H')
client.heartbeat(&buf[1], got-1);
else
client.send(buf, got);
}
}
::close(sockfd);
}
catch(std::exception& e)
{
std::cout << "Exception: " << e.what() << "\n";
return 1;
}
return 0;
}
|
