1
/* Copyright 2007, 2008 Free Software Foundation
3
* Copying and distribution of this file, with or without modification,
4
* are permitted in any medium without royalty provided the copyright
5
* notice and this notice are preserved.
15
#include <sys/types.h>
16
#include <sys/socket.h>
17
#include <arpa/inet.h>
19
#include <gnutls/gnutls.h>
21
/* A very basic TLS client, with PSK authentication.
25
#define CAFILE "ca.pem"
26
#define MSG "GET / HTTP/1.0\r\n\r\n"
28
extern int tcp_connect (void);
29
extern void tcp_close (int sd);
35
gnutls_session_t session;
36
char buffer[MAX_BUF + 1];
38
gnutls_psk_client_credentials_t pskcred;
39
const gnutls_datum_t key = { "DEADBEEF", 8 };
41
gnutls_global_init ();
43
gnutls_psk_allocate_client_credentials (&pskcred);
44
gnutls_psk_set_client_credentials (pskcred, "test", &key,
47
/* Initialize TLS session
49
gnutls_init (&session, GNUTLS_CLIENT);
51
/* Use default priorities */
52
ret = gnutls_priority_set_direct (session, "PERFORMANCE", &err);
54
if (ret == GNUTLS_E_INVALID_REQUEST) {
55
fprintf(stderr, "Syntax error at: %s\n", err);
60
/* put the x509 credentials to the current session
62
gnutls_credentials_set (session, GNUTLS_CRD_PSK, pskcred);
64
/* connect to the peer
68
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
70
/* Perform the TLS handshake
72
ret = gnutls_handshake (session);
76
fprintf (stderr, "*** Handshake failed\n");
82
printf ("- Handshake was completed\n");
85
gnutls_record_send (session, MSG, strlen (MSG));
87
ret = gnutls_record_recv (session, buffer, MAX_BUF);
90
printf ("- Peer has closed the TLS connection\n");
95
fprintf (stderr, "*** Error: %s\n", gnutls_strerror (ret));
99
printf ("- Received %d bytes: ", ret);
100
for (ii = 0; ii < ret; ii++)
102
fputc (buffer[ii], stdout);
104
fputs ("\n", stdout);
106
gnutls_bye (session, GNUTLS_SHUT_RDWR);
112
gnutls_deinit (session);
114
gnutls_psk_free_client_credentials (pskcred);
116
gnutls_global_deinit ();