1 /* This example code is placed in the public domain. */
10 #include <sys/types.h>
11 #include <sys/socket.h>
12 #include <arpa/inet.h>
14 #include <gnutls/gnutls.h>
16 /* A very basic TLS client, with PSK authentication.
20 #define MSG "GET / HTTP/1.0\r\n\r\n"
22 extern int tcp_connect (void);
23 extern void tcp_close (int sd);
29 gnutls_session_t session;
30 char buffer[MAX_BUF + 1];
32 gnutls_psk_client_credentials_t pskcred;
33 const gnutls_datum_t key = { (char *) "DEADBEEF", 8 };
35 gnutls_global_init ();
37 gnutls_psk_allocate_client_credentials (&pskcred);
38 gnutls_psk_set_client_credentials (pskcred, "test", &key,
41 /* Initialize TLS session
43 gnutls_init (&session, GNUTLS_CLIENT);
45 /* Use default priorities */
46 ret = gnutls_priority_set_direct (session, "PERFORMANCE", &err);
49 if (ret == GNUTLS_E_INVALID_REQUEST)
51 fprintf (stderr, "Syntax error at: %s\n", err);
56 /* put the x509 credentials to the current session
58 gnutls_credentials_set (session, GNUTLS_CRD_PSK, pskcred);
60 /* connect to the peer
64 gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
66 /* Perform the TLS handshake
68 ret = gnutls_handshake (session);
72 fprintf (stderr, "*** Handshake failed\n");
78 printf ("- Handshake was completed\n");
81 gnutls_record_send (session, MSG, strlen (MSG));
83 ret = gnutls_record_recv (session, buffer, MAX_BUF);
86 printf ("- Peer has closed the TLS connection\n");
91 fprintf (stderr, "*** Error: %s\n", gnutls_strerror (ret));
95 printf ("- Received %d bytes: ", ret);
96 for (ii = 0; ii < ret; ii++)
98 fputc (buffer[ii], stdout);
100 fputs ("\n", stdout);
102 gnutls_bye (session, GNUTLS_SHUT_RDWR);
108 gnutls_deinit (session);
110 gnutls_psk_free_client_credentials (pskcred);
112 gnutls_global_deinit ();