+++ /dev/null
-/* This example code is placed in the public domain. */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
-#include <netinet/in.h>
-#include <string.h>
-#include <unistd.h>
-#include <gnutls/gnutls.h>
-#include <gnutls/openpgp.h>
-
-#define KEYFILE "secret.asc"
-#define CERTFILE "public.asc"
-#define RINGFILE "ring.gpg"
-
-/* This is a sample TLS 1.0-OpenPGP echo server.
- */
-
-
-#define SOCKET_ERR(err,s) if(err==-1) {perror(s);return(1);}
-#define MAX_BUF 1024
-#define PORT 5556 /* listen to 5556 port */
-
-/* These are global */
-gnutls_dh_params_t dh_params;
-
-static int generate_dh_params(void)
-{
- unsigned int bits = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH,
- GNUTLS_SEC_PARAM_LEGACY);
-
- /* Generate Diffie-Hellman parameters - for use with DHE
- * kx algorithms. These should be discarded and regenerated
- * once a day, once a week or once a month. Depending on the
- * security requirements.
- */
- gnutls_dh_params_init(&dh_params);
- gnutls_dh_params_generate2(dh_params, bits);
-
- return 0;
-}
-
-int main(void)
-{
- int err, listen_sd;
- int sd, ret;
- struct sockaddr_in sa_serv;
- struct sockaddr_in sa_cli;
- socklen_t client_len;
- char topbuf[512];
- gnutls_session_t session;
- gnutls_certificate_credentials_t cred;
- char buffer[MAX_BUF + 1];
- int optval = 1;
- char name[256];
-
- strcpy(name, "Echo Server");
-
- if (gnutls_check_version("3.1.4") == NULL) {
- fprintf(stderr, "GnuTLS 3.1.4 or later is required for this example\n");
- exit(1);
- }
-
- /* for backwards compatibility with gnutls < 3.3.0 */
- gnutls_global_init();
-
- gnutls_certificate_allocate_credentials(&cred);
- gnutls_certificate_set_openpgp_keyring_file(cred, RINGFILE,
- GNUTLS_OPENPGP_FMT_BASE64);
-
- gnutls_certificate_set_openpgp_key_file(cred, CERTFILE, KEYFILE,
- GNUTLS_OPENPGP_FMT_BASE64);
-
- generate_dh_params();
-
- gnutls_certificate_set_dh_params(cred, dh_params);
-
- /* Socket operations
- */
- listen_sd = socket(AF_INET, SOCK_STREAM, 0);
- SOCKET_ERR(listen_sd, "socket");
-
- memset(&sa_serv, '\0', sizeof(sa_serv));
- sa_serv.sin_family = AF_INET;
- sa_serv.sin_addr.s_addr = INADDR_ANY;
- sa_serv.sin_port = htons(PORT); /* Server Port number */
-
- setsockopt(listen_sd, SOL_SOCKET, SO_REUSEADDR, (void *) &optval,
- sizeof(int));
-
- err =
- bind(listen_sd, (struct sockaddr *) &sa_serv, sizeof(sa_serv));
- SOCKET_ERR(err, "bind");
- err = listen(listen_sd, 1024);
- SOCKET_ERR(err, "listen");
-
- printf("%s ready. Listening to port '%d'.\n\n", name, PORT);
-
- client_len = sizeof(sa_cli);
- for (;;) {
- gnutls_init(&session, GNUTLS_SERVER);
- gnutls_priority_set_direct(session,
- "NORMAL:+CTYPE-OPENPGP", NULL);
-
- /* request client certificate if any.
- */
- gnutls_certificate_server_set_request(session,
- GNUTLS_CERT_REQUEST);
-
- sd = accept(listen_sd, (struct sockaddr *) &sa_cli,
- &client_len);
-
- printf("- connection from %s, port %d\n",
- inet_ntop(AF_INET, &sa_cli.sin_addr, topbuf,
- sizeof(topbuf)), ntohs(sa_cli.sin_port));
-
- gnutls_transport_set_int(session, sd);
- ret = gnutls_handshake(session);
- if (ret < 0) {
- close(sd);
- gnutls_deinit(session);
- fprintf(stderr,
- "*** Handshake has failed (%s)\n\n",
- gnutls_strerror(ret));
- continue;
- }
- printf("- Handshake was completed\n");
-
- /* see the Getting peer's information example */
- /* print_info(session); */
-
- for (;;) {
- ret = gnutls_record_recv(session, buffer, MAX_BUF);
-
- if (ret == 0) {
- printf
- ("\n- Peer has closed the GnuTLS connection\n");
- break;
- } else if (ret < 0
- && gnutls_error_is_fatal(ret) == 0) {
- fprintf(stderr, "*** Warning: %s\n",
- gnutls_strerror(ret));
- } else if (ret < 0) {
- fprintf(stderr, "\n*** Received corrupted "
- "data(%d). Closing the connection.\n\n",
- ret);
- break;
- } else if (ret > 0) {
- /* echo data back to the client
- */
- gnutls_record_send(session, buffer, ret);
- }
- }
- printf("\n");
- /* do not wait for the peer to close the connection.
- */
- gnutls_bye(session, GNUTLS_SHUT_WR);
-
- close(sd);
- gnutls_deinit(session);
-
- }
- close(listen_sd);
-
- gnutls_certificate_free_credentials(cred);
-
- gnutls_global_deinit();
-
- return 0;
-
-}