--- /dev/null
+/*
+** 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 <gnet.h>
+#include <glib.h>
+#include <string.h>
+#include <errno.h>
+#include "ssl.h"
+
+#define container_of(ptr, type, member) ({ \
+ const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (char *)__mptr - offsetof(type,member) );})
+
+struct ssl_data
+{
+ char *server;
+ gnutls_session_t session;
+ GString *buffer;
+ gboolean handshaking;
+};
+
+static struct ssl_data *
+ssl_data_new (char *server)
+{
+ 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);
+ ssl->server = g_strdup (server);
+ 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_free (ssl->server);
+ 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)
+ {
+ g_io_channel_write_chars (hook->conn->iochannel, buffer, len,
+ &r, NULL);
+ return r;
+ }
+ gnet_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)
+ {
+ g_io_channel_read_chars (hook->conn->iochannel, buffer, len,
+ &r, NULL);
+ 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)
+ {
+ g_message ("%satal error while doing TLS handshaking.\n",
+ gnutls_error_is_fatal (error) ? "F" : "Nonf");
+ g_message ("%s\n", gnutls_strerror (error));
+ }
+ 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;
+ gnet_conn_disconnect (hook->peer->conn);
+ }
+ gnet_conn_delete (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_write (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)
+ gnet_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.");
+}
+
+static net_hook_t *
+ssl_server_hook_new (net_hook_t *client_hook, char *server)
+{
+ net_hook_t *hook;
+ hook = g_slice_new (net_hook_t);
+ hook->conn = gnet_conn_new (server, 995, nethook_event, hook);
+ hook->peer = client_hook;
+ hook->server = TRUE;
+ hook->connect = ssl_server_connect;
+ hook->close = ssl_server_close;
+ hook->write = ssl_server_write;
+ hook->read = ssl_server_read;
+ hook->data = ssl_data_new (server);
+ gnet_conn_connect (hook->conn);
+ gnet_conn_read (hook->conn);
+ return hook;
+}
+
+static void
+ssl_connect (net_hook_t *hook)
+{
+}
+
+static void
+ssl_close (net_hook_t *hook)
+{
+}
+
+static void
+ssl_write (net_hook_t *hook)
+{
+}
+
+static void
+ssl_read (net_hook_t *hook, gchar *buffer, size_t len)
+{
+ struct ssl_data *ssl = hook->peer->data;
+ gnutls_record_send (ssl->session, buffer, len);
+}
+
+static void
+ssl_error (net_hook_t *hook)
+{
+}
+
+net_hook_t *
+ssl_hook_new (GConn *conn, char *server)
+{
+ net_hook_t *hook;
+ hook = g_slice_new (net_hook_t);
+ hook->conn = conn;
+ hook->peer = NULL;
+ hook->server = FALSE;
+ hook->connect = ssl_connect;
+ hook->close = ssl_close;
+ hook->write = ssl_write;
+ hook->read = ssl_read;
+ hook->data = NULL;
+ hook->peer = ssl_server_hook_new (hook, server);
+ gnet_conn_set_callback (hook->conn, nethook_event, hook);
+ return hook;
+}
+
+void
+ssl_destroy (net_hook_t *hook)
+{
+ g_slice_free (net_hook_t, hook);
+}
projects / cascardo / rnetproxy.git / commitdiff