-/*
-** Copyright (C) 2006 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
-** Copyright (C) 2009 Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
-**
-** This program is free software; you can redistribute it and/or modify
-** it under the terms of the GNU General Public License as published by
-** the Free Software Foundation; either version 2 of the License, or
-** (at your option) any later version.
-**
-** This program is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-** GNU General Public License for more details.
-**
-** You should have received a copy of the GNU General Public License
-** along with this program; if not, write to the Free Software
-** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-**
-*/
-
-#include <gnutls/gnutls.h>
-#include <glib.h>
-#include <string.h>
-#include <errno.h>
-#include "ssl.h"
-
-static struct ssl_data *
-ssl_data_new (void)
-{
- struct ssl_data *ssl;
- int kx_prio[] = {GNUTLS_KX_RSA, 0};
- gnutls_certificate_credentials cred;
- gnutls_certificate_allocate_credentials (&cred);
- ssl = g_slice_new (struct ssl_data);
- gnutls_init (&ssl->session, GNUTLS_CLIENT);
- gnutls_set_default_priority (ssl->session);
- gnutls_set_default_priority (ssl->session);
- gnutls_kx_set_priority (ssl->session, kx_prio);
- gnutls_credentials_set (ssl->session, GNUTLS_CRD_CERTIFICATE, cred);
- ssl->buffer = g_string_sized_new (4096);
- ssl->handshaking = FALSE;
- return ssl;
-}
-
-static void
-ssl_data_destroy (struct ssl_data *ssl)
-{
- gnutls_deinit (ssl->session);
- g_string_free (ssl->buffer, TRUE);
- g_slice_free (struct ssl_data, ssl);
-}
-
-static ssize_t
-ssl_push (gnutls_transport_ptr_t ptr, const void *buffer, size_t len)
-{
- net_hook_t *hook = ptr;
- struct ssl_data *ssl = hook->data;
- int r;
- if (ssl->handshaking == TRUE)
- {
- hc_conn_write (hook->conn, (void *) buffer, len);
- return len;
- }
- hc_conn_write (hook->conn, (void *) buffer, len);
- return len;
-}
-
-static ssize_t
-ssl_pull (gnutls_transport_ptr_t ptr, void *buffer, size_t len)
-{
- net_hook_t *hook = ptr;
- struct ssl_data *ssl = hook->data;
- int r;
- if (ssl->handshaking == TRUE)
- {
- r = hc_conn_read (hook->conn, buffer, len);
- return r;
- }
- if (len > ssl->buffer->len)
- {
- r = ssl->buffer->len;
- memcpy (buffer, ssl->buffer->str, r);
- g_string_truncate (ssl->buffer, 0);
- }
- else
- {
- r = len;
- memcpy (buffer, ssl->buffer->str, r);
- g_string_erase (ssl->buffer, 0, r);
- }
- if (r == 0)
- {
- gnutls_transport_set_errno (ssl->session, EAGAIN);
- return -1;
- }
- return r;
-}
-
-static void
-ssl_server_connect (net_hook_t *hook)
-{
- struct ssl_data *ssl = hook->data;
- int error;
- gnutls_transport_set_ptr (ssl->session, (gnutls_transport_ptr_t) hook);
- gnutls_transport_set_push_function (ssl->session, ssl_push);
- gnutls_transport_set_pull_function (ssl->session, ssl_pull);
- ssl->handshaking = TRUE;
- if ((error = gnutls_handshake (ssl->session)) < 0)
- {
- if (gnutls_error_is_fatal (error))
- g_critical ("Fatal error while doing TLS handshaking: %s\n",
- gnutls_strerror (error));
- }
- if (error != GNUTLS_E_AGAIN && error != GNUTLS_E_INTERRUPTED)
- {
- ssl->handshaking = FALSE;
- }
-}
-
-static void
-ssl_server_close (net_hook_t *hook)
-{
- struct ssl_data *ssl = hook->data;
- if (hook->peer)
- {
- hook->peer->peer = NULL;
- hc_conn_close (hook->peer->conn);
- }
- hc_conn_close (hook->conn);
- if (ssl != NULL)
- {
- gnutls_bye (ssl->session, GNUTLS_SHUT_RDWR);
- ssl_data_destroy (ssl);
- }
- g_slice_free (net_hook_t, hook);
-}
-
-static void
-ssl_server_read (net_hook_t *hook, gchar *buffer, size_t len)
-{
- struct ssl_data *ssl = hook->data;
- int r;
- g_string_append_len (ssl->buffer, buffer, len);
- do
- {
- r = gnutls_record_recv (ssl->session, buffer, len);
- if (r > 0)
- hc_conn_write (hook->peer->conn, buffer, r);
- } while (r > 0);
-}
-
-static void
-ssl_server_error (net_hook_t *hook)
-{
- g_message ("Error in POP3 client connection.");
-}
-
-net_hook_t *
-ssl_server_hook_new (net_hook_t *client_hook, char *server, char *port)
-{
- net_hook_t *hook;
- int fd;
- hook = g_slice_new (net_hook_t);
- hook->peer = client_hook;
- hook->server = TRUE;
- hook->connect = ssl_server_connect;
- hook->close = ssl_server_close;
- hook->read = ssl_server_read;
- hook->data = ssl_data_new ();
- hook->conn = hc_conn_new (nethook_event, hook);
- fd = hc_tcp_connect (server, port);
- hc_conn_set_driver_channel (hook->conn, fd);
- return hook;
-}