Compila rnetserver e rnetclient.

[cascardo/rnetproxy.git] / hcconn_ssl.c

diff --git a/hcconn_ssl.c b/hcconn_ssl.c
index 5956acc..fdff9ef 100644 (file)
--- a/hcconn_ssl.c
+++ b/hcconn_ssl.c
@@ -1,6 +1,6 @@
 /*
 ** Copyright (C) 2006 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
-** Copyright (C) 2009 Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
+** Copyright (C) 2009 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
 **  
 ** 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
@@ -30,23 +30,71 @@ struct ssl_data
   gnutls_session_t session;
   GString *buffer;
   gboolean handshaking;
+  gboolean failed;
   gpointer lowconn;
 };
 
-static struct ssl_data *
-ssl_data_new (void)
+#define DH_BITS 1024
+void *
+hc_conn_ssl_server_init_credentials (char *certfile, char *keyfile)
+{
+  static int initialized = 0;
+  static gnutls_certificate_credentials_t cred;
+  gnutls_dh_params_t dh_params;
+  if (initialized)
+    return cred;
+  gnutls_dh_params_init (&dh_params);
+  gnutls_dh_params_generate2 (dh_params, DH_BITS);
+  gnutls_certificate_allocate_credentials (&cred);
+  gnutls_certificate_set_x509_key_file (cred, certfile, keyfile,
+                                        GNUTLS_X509_FMT_PEM);
+  gnutls_certificate_set_dh_params (cred, dh_params);
+  initialized = 1;
+  return cred;
+}
+
+static void *
+ssl_server_get_credentials(void)
+{
+  return hc_conn_ssl_server_init_credentials (NULL, NULL);
+}
+ 
+static void
+ssl_server_session_new (gnutls_session_t *session)
+{
+  static void *cred;
+  cred = ssl_server_get_credentials ();
+  gnutls_init (session, GNUTLS_SERVER);
+  gnutls_set_default_priority (*session);
+  gnutls_credentials_set (*session, GNUTLS_CRD_CERTIFICATE, cred);
+  gnutls_dh_set_prime_bits (*session, DH_BITS);
+}
+#undef DH_BITS
+
+static void
+ssl_client_session_new (gnutls_session_t *session)
 {
-  struct ssl_data *ssl;
   int kx_prio[] = {GNUTLS_KX_RSA, 0};
   gnutls_certificate_credentials cred;
   gnutls_certificate_allocate_credentials (&cred);
+  gnutls_init (session, GNUTLS_CLIENT);
+  gnutls_set_default_priority (*session);
+  gnutls_kx_set_priority (*session, kx_prio);
+  gnutls_credentials_set (*session, GNUTLS_CRD_CERTIFICATE, cred);
+}
+
+static struct ssl_data *
+ssl_data_new (int server)
+{
+  struct ssl_data *ssl;
   ssl = g_slice_new (struct ssl_data);
-  gnutls_init (&ssl->session, GNUTLS_CLIENT);
-  gnutls_set_default_priority (ssl->session);
-  gnutls_kx_set_priority (ssl->session, kx_prio);
-  gnutls_credentials_set (ssl->session, GNUTLS_CRD_CERTIFICATE, cred);
+  if (server)
+    ssl_server_session_new (&ssl->session);
+  else
+    ssl_client_session_new (&ssl->session);
   ssl->buffer = g_string_sized_new (4096);
   ssl->handshaking = FALSE;
+  ssl->failed = FALSE;
   return ssl;
 }
 
@@ -92,25 +140,31 @@ ssl_pull (gnutls_transport_ptr_t ptr, void *buffer, size_t len)
     }
   if (r == 0)
     {
-      gnutls_transport_set_errno (ssl->session, EAGAIN);
+      errno = (EAGAIN);
       return -1;
     }
   return r;
 }
 
 static void
-ssl_server_handshake (struct ssl_data *ssl)
+ssl_server_handshake (HCConn *conn)
 {
+  struct ssl_data *ssl = conn->layer;
   int error;
   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));
+        {
+          g_critical ("Fatal error while doing TLS handshaking: %s\n",
+                      gnutls_strerror (error));
+          ssl->failed = TRUE;
+        }
     }
   else
     {
       ssl->handshaking = FALSE;
+      if (conn->func)
+        conn->func (conn, HC_EVENT_CONNECT, conn->data);
     }
 }
 
@@ -122,7 +176,7 @@ ssl_server_connect (HCConn *conn)
   gnutls_transport_set_push_function (ssl->session, ssl_push);
   gnutls_transport_set_pull_function (ssl->session, ssl_pull);
   ssl->handshaking = TRUE;
-  ssl_server_handshake (ssl);
+  ssl_server_handshake (conn);
 }
 
 static void
@@ -158,24 +212,35 @@ hc_conn_ssl_watch (HCConn *conn, HCEvent event, gpointer data)
   HCConn *ssl_conn = data;
   struct ssl_data *ssl = ssl_conn->layer;
   int r;
-  if (event != HC_EVENT_READ)
-    return;
-  if (ssl->handshaking)
+  switch (event)
     {
-      ssl_server_handshake (ssl);
-      return;
+    case HC_EVENT_READ:
+      if (ssl->handshaking)
+        {
+          ssl_server_handshake (ssl_conn);
+          /* FIXME: create HC_CONN_ERROR */
+          if (ssl->failed && ssl_conn->func)
+            ssl_conn->func (ssl_conn, HC_EVENT_CLOSE, ssl_conn->data);
+          return;
+        }
+      while ((r = hc_conn_read (ssl->lowconn, buffer, sizeof (buffer))) > 0)
+        g_string_append_len (ssl->buffer, buffer, r);
+      if (ssl_conn->func && !ssl->handshaking)
+        ssl_conn->func (ssl_conn, event, ssl_conn->data);
+      break;
+    case HC_EVENT_CLOSE:
+      if (ssl_conn->func)
+        ssl_conn->func (ssl_conn, event, ssl_conn->data);
     }
-  while ((r = hc_conn_read (ssl->lowconn, buffer, sizeof (buffer))) > 0)
-    g_string_append_len (ssl->buffer, buffer, r);
-  if (ssl_conn->func && !ssl->handshaking)
-    ssl_conn->func (ssl_conn, event, ssl_conn->data);
-  return;
 }
 
-void
-hc_conn_set_driver_ssl (HCConn *conn, HCConn *lowconn)
+static int
+hc_conn_set_driver_ssl (HCConn *conn, HCConn *lowconn, int server)
 {
-  struct ssl_data *ssl = ssl_data_new ();
+  struct ssl_data *ssl;
+  ssl = ssl_data_new (server);
+  if (ssl == NULL)
+    return -1;
   ssl->lowconn = lowconn;
   conn->layer = ssl;
   conn->read = hc_conn_ssl_read;
@@ -183,4 +248,25 @@ hc_conn_set_driver_ssl (HCConn *conn, HCConn *lowconn)
   conn->close = hc_conn_ssl_close;
   hc_conn_set_callback (lowconn, hc_conn_ssl_watch, conn);
   ssl_server_connect (conn);
+  return 0;
+}
+
+int
+hc_conn_set_driver_ssl_client (HCConn *conn, HCConn *lowconn)
+{
+  return hc_conn_set_driver_ssl (conn, lowconn, 0);
+}
+
+int
+hc_conn_set_driver_ssl_server (HCConn *conn, HCConn *lowconn)
+{
+  return hc_conn_set_driver_ssl (conn, lowconn, 1);
+}
+
+void
+hc_conn_ssl_server_set_priority (HCConn *conn, char *priority)
+{
+  struct ssl_data *ssl;
+  ssl = conn->layer;
+  gnutls_priority_set_direct (ssl->session, priority, NULL);
 }