/usr/share/doc/gnutls-doc/examples/ex-cxx.cpp is in gnutls-doc 3.5.18-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | #include <config.h>
#include <iostream>
#include <stdexcept>
#include <gnutls/gnutls.h>
#include <gnutls/gnutlsxx.h>
#include <cstring> /* for strlen */
/* A very basic TLS client, with anonymous authentication.
* written by Eduardo Villanueva Che.
*/
#define MAX_BUF 1024
#define SA struct sockaddr
#define CAFILE "ca.pem"
#define MSG "GET / HTTP/1.0\r\n\r\n"
extern "C"
{
int tcp_connect(void);
void tcp_close(int sd);
}
int main(void)
{
int sd = -1;
gnutls_global_init();
try
{
/* Allow connections to servers that have OpenPGP keys as well.
*/
gnutls::client_session session;
/* X509 stuff */
gnutls::certificate_credentials credentials;
/* sets the trusted cas file
*/
credentials.set_x509_trust_file(CAFILE, GNUTLS_X509_FMT_PEM);
/* put the x509 credentials to the current session
*/
session.set_credentials(credentials);
/* Use default priorities */
session.set_priority ("NORMAL", NULL);
/* connect to the peer
*/
sd = tcp_connect();
session.set_transport_ptr((gnutls_transport_ptr_t) (ptrdiff_t)sd);
/* Perform the TLS handshake
*/
int ret = session.handshake();
if (ret < 0)
{
throw std::runtime_error("Handshake failed");
}
else
{
std::cout << "- Handshake was completed" << std::endl;
}
session.send(MSG, strlen(MSG));
char buffer[MAX_BUF + 1];
ret = session.recv(buffer, MAX_BUF);
if (ret == 0)
{
throw std::runtime_error("Peer has closed the TLS connection");
}
else if (ret < 0)
{
throw std::runtime_error(gnutls_strerror(ret));
}
std::cout << "- Received " << ret << " bytes:" << std::endl;
std::cout.write(buffer, ret);
std::cout << std::endl;
session.bye(GNUTLS_SHUT_RDWR);
}
catch (std::exception &ex)
{
std::cerr << "Exception caught: " << ex.what() << std::endl;
}
if (sd != -1)
tcp_close(sd);
gnutls_global_deinit();
return 0;
}
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