From 25af79434706fce2d5fc4c841ec4730f3436b224 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jonas=20=C3=85dahl?= Date: Tue, 7 Aug 2018 13:37:12 +0200 Subject: [PATCH] Update to 0.1.6 + GnuTLS This also includes a patch that aligns the pipewire requirement with the rest of Fedora. --- ...d-Bump-pipewire-requirement-to-0.2.2.patch | 25 + ...Add-anonymous-TLS-encryption-support.patch | 953 ++++++++++++++++++ gnome-remote-desktop.spec | 14 +- 3 files changed, 988 insertions(+), 4 deletions(-) create mode 100644 0001-meson.build-Bump-pipewire-requirement-to-0.2.2.patch create mode 100644 0001-vnc-Add-anonymous-TLS-encryption-support.patch diff --git a/0001-meson.build-Bump-pipewire-requirement-to-0.2.2.patch b/0001-meson.build-Bump-pipewire-requirement-to-0.2.2.patch new file mode 100644 index 0000000..62b84b2 --- /dev/null +++ b/0001-meson.build-Bump-pipewire-requirement-to-0.2.2.patch @@ -0,0 +1,25 @@ +From 8f760d73df6011330cd09da7ca7b8a3f40c9a3ef Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Jonas=20=C3=85dahl?= +Date: Tue, 7 Aug 2018 13:35:43 +0200 +Subject: [PATCH] meson.build: Bump pipewire requirement to 0.2.2 + +--- + meson.build | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/meson.build b/meson.build +index 6951b89..34ec5ea 100644 +--- a/meson.build ++++ b/meson.build +@@ -10,7 +10,7 @@ gnome = import('gnome') + glib_dep = dependency('glib-2.0') + gio_dep = dependency('gio-2.0') + gio_unix_dep = dependency('gio-unix-2.0') +-pipewire_dep = dependency('libpipewire-0.1') ++pipewire_dep = dependency('libpipewire-0.2', version: '>= 0.2.2') + systemd_dep = dependency('systemd') + libvncserver_dep = dependency('libvncserver') + libsecret_dep = dependency('libsecret-1') +-- +2.17.1 + diff --git a/0001-vnc-Add-anonymous-TLS-encryption-support.patch b/0001-vnc-Add-anonymous-TLS-encryption-support.patch new file mode 100644 index 0000000..fe25694 --- /dev/null +++ b/0001-vnc-Add-anonymous-TLS-encryption-support.patch @@ -0,0 +1,953 @@ +From fcfef86768d3dc63a2e7da799beb011800dff2ad Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Jonas=20=C3=85dahl?= +Date: Thu, 14 Jun 2018 12:21:37 +0200 +Subject: [PATCH] vnc: Add anonymous TLS encryption support + +Add support for encrypting the VNC connection using anonymous TLS. In +effect this means that the channel is encrypted using TLS but that no +authentication of the peers are done. This means the connection is still +vulnerable to man-in-the-middle attacks where an attacker proxies the +VNC connection. +--- + meson.build | 1 + + src/grd-enums.h | 6 + + src/grd-session-vnc.c | 98 +++- + src/grd-session-vnc.h | 16 + + src/grd-settings.c | 27 ++ + src/grd-settings.h | 2 + + src/grd-vnc-server.c | 45 ++ + src/grd-vnc-tls.c | 444 ++++++++++++++++++ + src/grd-vnc-tls.h | 28 ++ + src/meson.build | 5 +- + ...g.gnome.desktop.remote-desktop.gschema.xml | 10 + + 11 files changed, 666 insertions(+), 16 deletions(-) + create mode 100644 src/grd-vnc-tls.c + create mode 100644 src/grd-vnc-tls.h + +diff --git a/meson.build b/meson.build +index d8e20d2..f8c8cee 100644 +--- a/meson.build ++++ b/meson.build +@@ -15,6 +15,7 @@ systemd_dep = dependency('systemd') + libvncserver_dep = dependency('libvncserver') + libsecret_dep = dependency('libsecret-1') + libnotify_dep = dependency('libnotify') ++gnutls_dep = dependency('gnutls') + + cdata = configuration_data() + cdata.set_quoted('GETTEXT_PACKAGE', 'gnome-remote-desktop') +diff --git a/src/grd-enums.h b/src/grd-enums.h +index ffab821..4333863 100644 +--- a/src/grd-enums.h ++++ b/src/grd-enums.h +@@ -27,4 +27,10 @@ typedef enum + GRD_VNC_AUTH_METHOD_PASSWORD + } GrdVncAuthMethod; + ++typedef enum ++{ ++ GRD_VNC_ENCRYPTION_NONE = 1 << 0, ++ GRD_VNC_ENCRYPTION_TLS_ANON = 1 << 1, ++} GrdVncEncryption; ++ + #endif /* GRD_ENUMS_H */ +diff --git a/src/grd-session-vnc.c b/src/grd-session-vnc.c +index 5d40971..ce4dd29 100644 +--- a/src/grd-session-vnc.c ++++ b/src/grd-session-vnc.c +@@ -44,7 +44,9 @@ struct _GrdSessionVnc + { + GrdSession parent; + ++ GrdVncServer *vnc_server; + GSocketConnection *connection; ++ GList *socket_grabs; + GSource *source; + rfbScreenInfoPtr rfb_screen; + rfbClientPtr rfb_client; +@@ -465,12 +467,30 @@ check_rfb_password (rfbClientPtr rfb_client, + } + } + ++int ++grd_session_vnc_get_fd (GrdSessionVnc *session_vnc) ++{ ++ return session_vnc->rfb_screen->inetdSock; ++} ++ + int + grd_session_vnc_get_framebuffer_stride (GrdSessionVnc *session_vnc) + { + return session_vnc->rfb_screen->paddedWidthInBytes; + } + ++rfbClientPtr ++grd_session_vnc_get_rfb_client (GrdSessionVnc *session_vnc) ++{ ++ return session_vnc->rfb_client; ++} ++ ++GrdVncServer * ++grd_session_vnc_get_vnc_server (GrdSessionVnc *session_vnc) ++{ ++ return session_vnc->vnc_server; ++} ++ + static void + init_vnc_session (GrdSessionVnc *session_vnc) + { +@@ -509,33 +529,74 @@ init_vnc_session (GrdSessionVnc *session_vnc) + rfbProcessEvents (rfb_screen, 0); + } + ++void ++grd_session_vnc_grab_socket (GrdSessionVnc *session_vnc, ++ GrdVncSocketGrabFunc grab_func) ++{ ++ session_vnc->socket_grabs = g_list_prepend (session_vnc->socket_grabs, ++ grab_func); ++} ++ ++void ++grd_session_vnc_ungrab_socket (GrdSessionVnc *session_vnc, ++ GrdVncSocketGrabFunc grab_func) ++{ ++ session_vnc->socket_grabs = g_list_remove (session_vnc->socket_grabs, ++ grab_func); ++} ++ ++static gboolean ++vnc_socket_grab_func (GrdSessionVnc *session_vnc, ++ GError **error) ++{ ++ if (rfbIsActive (session_vnc->rfb_screen)) ++ { ++ rfbProcessEvents (session_vnc->rfb_screen, 0); ++ ++ if (session_vnc->pending_framebuffer_resize && ++ session_vnc->rfb_client->preferredEncoding != -1) ++ { ++ resize_vnc_framebuffer (session_vnc, ++ session_vnc->pending_framebuffer_width, ++ session_vnc->pending_framebuffer_height); ++ session_vnc->pending_framebuffer_resize = FALSE; ++ } ++ } ++ ++ return TRUE; ++} ++ + static gboolean + handle_socket_data (GSocket *socket, + GIOCondition condition, + gpointer user_data) + { +- GrdSessionVnc *session_vnc = user_data; ++ GrdSessionVnc *session_vnc = GRD_SESSION_VNC (user_data); ++ GrdSession *session = GRD_SESSION (session_vnc); + +- if (condition & G_IO_IN) ++ if (condition & (G_IO_ERR | G_IO_HUP)) ++ { ++ g_warning ("Client disconnected"); ++ ++ grd_session_stop (session); ++ } ++ else if (condition & G_IO_IN) + { +- if (rfbIsActive (session_vnc->rfb_screen)) ++ GrdVncSocketGrabFunc grab_func; ++ g_autoptr (GError) error = NULL; ++ ++ grab_func = g_list_first (session_vnc->socket_grabs)->data; ++ if (!grab_func (session_vnc, &error)) + { +- rfbProcessEvents (session_vnc->rfb_screen, 0); ++ g_warning ("Error when reading socket: %s", error->message); + +- if (session_vnc->pending_framebuffer_resize && +- session_vnc->rfb_client->preferredEncoding != -1) +- { +- resize_vnc_framebuffer (session_vnc, +- session_vnc->pending_framebuffer_width, +- session_vnc->pending_framebuffer_height); +- session_vnc->pending_framebuffer_resize = FALSE; +- } ++ grd_session_stop (session); + } + } + else + { +- g_debug ("Unhandled socket condition %d\n", condition); +- return G_SOURCE_REMOVE; ++ g_warning ("Unhandled socket condition %d\n", condition); ++ g_assert_not_reached (); + } + + return G_SOURCE_CONTINUE; +@@ -548,7 +609,10 @@ grd_session_vnc_attach_source (GrdSessionVnc *session_vnc) + + socket = g_socket_connection_get_socket (session_vnc->connection); + session_vnc->source = g_socket_create_source (socket, +- G_IO_IN | G_IO_PRI, ++ (G_IO_IN | ++ G_IO_PRI | ++ G_IO_ERR | ++ G_IO_HUP), + NULL); + g_source_set_callback (session_vnc->source, + (GSourceFunc) handle_socket_data, +@@ -574,8 +638,10 @@ grd_session_vnc_new (GrdVncServer *vnc_server, + "context", context, + NULL); + ++ session_vnc->vnc_server = vnc_server; + session_vnc->connection = g_object_ref (connection); + ++ grd_session_vnc_grab_socket (session_vnc, vnc_socket_grab_func); + grd_session_vnc_attach_source (session_vnc); + + init_vnc_session (session_vnc); +@@ -590,6 +656,8 @@ grd_session_vnc_dispose (GObject *object) + + g_assert (!session_vnc->rfb_screen); + ++ g_clear_pointer (&session_vnc->socket_grabs, g_list_free); ++ + g_clear_pointer (&session_vnc->pressed_keys, g_hash_table_unref); + + G_OBJECT_CLASS (grd_session_vnc_parent_class)->dispose (object); +diff --git a/src/grd-session-vnc.h b/src/grd-session-vnc.h +index 6bd067a..33245bc 100644 +--- a/src/grd-session-vnc.h ++++ b/src/grd-session-vnc.h +@@ -25,6 +25,7 @@ + + #include + #include ++#include + + #include "grd-session.h" + #include "grd-types.h" +@@ -35,6 +36,9 @@ G_DECLARE_FINAL_TYPE (GrdSessionVnc, + GRD, SESSION_VNC, + GrdSession); + ++typedef gboolean (* GrdVncSocketGrabFunc) (GrdSessionVnc *session_vnc, ++ GError **error); ++ + GrdSessionVnc *grd_session_vnc_new (GrdVncServer *vnc_server, + GSocketConnection *connection); + +@@ -45,6 +49,18 @@ void grd_session_vnc_queue_resize_framebuffer (GrdSessionVnc *session_vnc, + void grd_session_vnc_draw_buffer (GrdSessionVnc *session_vnc, + void *data); + ++int grd_session_vnc_get_fd (GrdSessionVnc *session_vnc); ++ + int grd_session_vnc_get_framebuffer_stride (GrdSessionVnc *session_vnc); + ++rfbClientPtr grd_session_vnc_get_rfb_client (GrdSessionVnc *session_vnc); ++ ++void grd_session_vnc_grab_socket (GrdSessionVnc *session_vnc, ++ GrdVncSocketGrabFunc grab_func); ++ ++void grd_session_vnc_ungrab_socket (GrdSessionVnc *session_vnc, ++ GrdVncSocketGrabFunc grab_func); ++ ++GrdVncServer * grd_session_vnc_get_vnc_server (GrdSessionVnc *session_vnc); ++ + #endif /* GRD_SESSION_VNC_H */ +diff --git a/src/grd-settings.c b/src/grd-settings.c +index a3a2afa..c886b7e 100644 +--- a/src/grd-settings.c ++++ b/src/grd-settings.c +@@ -46,6 +46,7 @@ struct _GrdSettings + GSettings *settings; + gboolean view_only; + GrdVncAuthMethod auth_method; ++ GrdVncEncryption encryption; + } vnc; + }; + +@@ -87,6 +88,12 @@ grd_settings_get_vnc_auth_method (GrdSettings *settings) + return settings->vnc.auth_method; + } + ++GrdVncEncryption ++grd_settings_get_vnc_encryption (GrdSettings *settings) ++{ ++ return settings->vnc.encryption; ++} ++ + static void + update_vnc_view_only (GrdSettings *settings) + { +@@ -101,6 +108,13 @@ update_vnc_auth_method (GrdSettings *settings) + "auth-method"); + } + ++static void ++update_vnc_encryption (GrdSettings *settings) ++{ ++ settings->vnc.encryption = g_settings_get_flags (settings->vnc.settings, ++ "encryption"); ++} ++ + static void + on_vnc_settings_changed (GSettings *vnc_settings, + const char *key, +@@ -116,6 +130,11 @@ on_vnc_settings_changed (GSettings *vnc_settings, + update_vnc_auth_method (settings); + g_signal_emit (settings, signals[VNC_AUTH_METHOD_CHANGED], 0); + } ++ else if (strcmp (key, "encryption") == 0) ++ { ++ update_vnc_encryption (settings); ++ g_signal_emit (settings, signals[VNC_ENCRYPTION_CHANGED], 0); ++ } + } + + static void +@@ -137,6 +156,7 @@ grd_settings_init (GrdSettings *settings) + + update_vnc_view_only (settings); + update_vnc_auth_method (settings); ++ update_vnc_encryption (settings); + } + + static void +@@ -160,4 +180,11 @@ grd_settings_class_init (GrdSettingsClass *klass) + 0, + NULL, NULL, NULL, + G_TYPE_NONE, 0); ++ signals[VNC_ENCRYPTION_CHANGED] = ++ g_signal_new ("vnc-encryption-changed", ++ G_TYPE_FROM_CLASS (klass), ++ G_SIGNAL_RUN_LAST, ++ 0, ++ NULL, NULL, NULL, ++ G_TYPE_NONE, 0); + } +diff --git a/src/grd-settings.h b/src/grd-settings.h +index 9b23b09..4bca403 100644 +--- a/src/grd-settings.h ++++ b/src/grd-settings.h +@@ -40,4 +40,6 @@ gboolean grd_settings_get_vnc_view_only (GrdSettings *settings); + + GrdVncAuthMethod grd_settings_get_vnc_auth_method (GrdSettings *settings); + ++GrdVncEncryption grd_settings_get_vnc_encryption (GrdSettings *settings); ++ + #endif /* GRD_SETTINGS_H */ +diff --git a/src/grd-vnc-server.c b/src/grd-vnc-server.c +index a8fed02..769b7ec 100644 +--- a/src/grd-vnc-server.c ++++ b/src/grd-vnc-server.c +@@ -24,11 +24,13 @@ + + #include "grd-vnc-server.h" + ++#include + #include + #include + + #include "grd-context.h" + #include "grd-session-vnc.h" ++#include "grd-vnc-tls.h" + + #define GRD_VNC_SERVER_PORT 5900 + +@@ -131,6 +133,43 @@ on_incoming (GSocketService *service, + return TRUE; + } + ++static void ++sync_encryption_settings (GrdVncServer *vnc_server) ++{ ++ GrdSettings *settings = grd_context_get_settings (vnc_server->context); ++ rfbSecurityHandler *tls_security_handler; ++ GrdVncEncryption encryption; ++ ++ tls_security_handler = grd_vnc_tls_get_security_handler (); ++ encryption = grd_settings_get_vnc_encryption (settings); ++ ++ if (encryption == (GRD_VNC_ENCRYPTION_NONE | GRD_VNC_ENCRYPTION_TLS_ANON)) ++ { ++ rfbRegisterSecurityHandler (tls_security_handler); ++ rfbUnregisterChannelSecurityHandler (tls_security_handler); ++ } ++ else if (encryption == GRD_VNC_ENCRYPTION_NONE) ++ { ++ rfbUnregisterSecurityHandler (tls_security_handler); ++ rfbUnregisterChannelSecurityHandler (tls_security_handler); ++ } ++ else ++ { ++ if (encryption != GRD_VNC_ENCRYPTION_TLS_ANON) ++ g_warning ("Invalid VNC encryption setting, falling back to TLS-ANON"); ++ ++ rfbRegisterChannelSecurityHandler (tls_security_handler); ++ rfbUnregisterSecurityHandler (tls_security_handler); ++ } ++} ++ ++static void ++on_vnc_encryption_changed (GrdSettings *settings, ++ GrdVncServer *vnc_server) ++{ ++ sync_encryption_settings (vnc_server); ++} ++ + gboolean + grd_vnc_server_start (GrdVncServer *vnc_server, + GError **error) +@@ -219,12 +258,18 @@ static void + grd_vnc_server_constructed (GObject *object) + { + GrdVncServer *vnc_server = GRD_VNC_SERVER (object); ++ GrdSettings *settings = grd_context_get_settings (vnc_server->context); + + if (grd_context_get_debug_flags (vnc_server->context) & GRD_DEBUG_VNC) + rfbLogEnable (1); + else + rfbLogEnable (0); + ++ g_signal_connect (settings, "vnc-encryption-changed", ++ G_CALLBACK (on_vnc_encryption_changed), ++ vnc_server); ++ sync_encryption_settings (vnc_server); ++ + G_OBJECT_CLASS (grd_vnc_server_parent_class)->constructed (object); + } + +diff --git a/src/grd-vnc-tls.c b/src/grd-vnc-tls.c +new file mode 100644 +index 0000000..8fc0fc2 +--- /dev/null ++++ b/src/grd-vnc-tls.c +@@ -0,0 +1,444 @@ ++/* ++ * Copyright (C) 2018 Red Hat Inc. ++ * ++ * 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 "grd-vnc-tls.h" ++ ++#include ++#include ++#include ++#include ++ ++#include "grd-session-vnc.h" ++#include "grd-vnc-server.h" ++ ++typedef struct _GrdVncTlsContext ++{ ++ gnutls_anon_server_credentials_t anon_credentials; ++ gnutls_dh_params_t dh_params; ++} GrdVncTlsContext; ++ ++typedef enum _GrdTlsHandshakeState ++{ ++ GRD_TLS_HANDSHAKE_STATE_INIT, ++ GRD_TLS_HANDSHAKE_STATE_DURING, ++ GRD_TLS_HANDSHAKE_STATE_FINISHED ++} GrdTlsHandshakeState; ++ ++typedef struct _GrdVncTlsSession ++{ ++ GrdVncTlsContext *tls_context; ++ ++ int fd; ++ ++ gnutls_session_t tls_session; ++ GrdTlsHandshakeState handshake_state; ++ ++ char *peek_buffer; ++ int peek_buffer_size; ++ int peek_buffer_len; ++} GrdVncTlsSession; ++ ++static gboolean ++tls_handshake_grab_func (GrdSessionVnc *session_vnc, ++ GError **error); ++ ++static GrdVncTlsContext * ++grd_vnc_tls_context_new (void) ++{ ++ GrdVncTlsContext *tls_context; ++ const unsigned int dh_bits = 1024; ++ ++ tls_context = g_new0 (GrdVncTlsContext, 1); ++ ++ gnutls_global_init (); ++ ++ gnutls_anon_allocate_server_credentials (&tls_context->anon_credentials); ++ ++ gnutls_dh_params_init (&tls_context->dh_params); ++ gnutls_dh_params_generate2 (tls_context->dh_params, dh_bits); ++ ++ gnutls_anon_set_server_dh_params (tls_context->anon_credentials, ++ tls_context->dh_params); ++ ++ return tls_context; ++} ++ ++static void ++grd_vnc_tls_context_free (GrdVncTlsContext *tls_context) ++{ ++ gnutls_dh_params_deinit (tls_context->dh_params); ++ gnutls_anon_free_server_credentials (tls_context->anon_credentials); ++ gnutls_global_deinit (); ++} ++ ++GrdVncTlsContext * ++ensure_tls_context (GrdVncServer *vnc_server) ++{ ++ GrdVncTlsContext *tls_context; ++ ++ tls_context = g_object_get_data (G_OBJECT (vnc_server), "vnc-tls-context"); ++ if (!tls_context) ++ { ++ tls_context = grd_vnc_tls_context_new (); ++ g_object_set_data_full (G_OBJECT (vnc_server), "vnc-tls-context", ++ tls_context, ++ (GDestroyNotify) grd_vnc_tls_context_free); ++ } ++ ++ return tls_context; ++} ++ ++static gboolean ++perform_anon_tls_handshake (GrdVncTlsSession *tls_session, ++ GError **error) ++{ ++ GrdVncTlsContext *tls_context = tls_session->tls_context; ++ const char kx_priority[] = "NORMAL:+ANON-DH"; ++ int ret; ++ ++ gnutls_init (&tls_session->tls_session, GNUTLS_SERVER | GNUTLS_NO_SIGNAL); ++ ++ gnutls_set_default_priority (tls_session->tls_session); ++ gnutls_priority_set_direct (tls_session->tls_session, kx_priority, NULL); ++ ++ gnutls_credentials_set (tls_session->tls_session, ++ GNUTLS_CRD_ANON, ++ tls_context->anon_credentials); ++ gnutls_transport_set_ptr (tls_session->tls_session, ++ GINT_TO_POINTER (tls_session->fd)); ++ ++ ret = gnutls_handshake (tls_session->tls_session); ++ if (ret != GNUTLS_E_SUCCESS && !gnutls_error_is_fatal (ret)) ++ { ++ tls_session->handshake_state = GRD_TLS_HANDSHAKE_STATE_DURING; ++ return TRUE; ++ } ++ ++ if (ret != GNUTLS_E_SUCCESS) ++ { ++ g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, ++ "%s", gnutls_strerror (ret)); ++ gnutls_deinit (tls_session->tls_session); ++ tls_session->tls_session = NULL; ++ return FALSE; ++ } ++ ++ tls_session->handshake_state = GRD_TLS_HANDSHAKE_STATE_FINISHED; ++ return TRUE; ++} ++ ++static gboolean ++continue_tls_handshake (GrdVncTlsSession *tls_session, ++ GError **error) ++{ ++ int ret; ++ ++ ret = gnutls_handshake (tls_session->tls_session); ++ if (ret != GNUTLS_E_SUCCESS && !gnutls_error_is_fatal (ret)) ++ return TRUE; ++ ++ if (ret != GNUTLS_E_SUCCESS) ++ { ++ g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, ++ "%s", gnutls_strerror (ret)); ++ gnutls_deinit (tls_session->tls_session); ++ tls_session->tls_session = NULL; ++ return FALSE; ++ } ++ ++ tls_session->handshake_state = GRD_TLS_HANDSHAKE_STATE_FINISHED; ++ return TRUE; ++} ++ ++static void ++grd_vnc_tls_session_free (GrdVncTlsSession *tls_session) ++{ ++ g_clear_pointer (&tls_session->peek_buffer, g_free); ++ g_clear_pointer (&tls_session->tls_session, (GDestroyNotify) gnutls_deinit); ++ g_free (tls_session); ++} ++ ++static GrdVncTlsSession * ++grd_vnc_tls_session_from_vnc_session (GrdSessionVnc *session_vnc) ++{ ++ return g_object_get_data (G_OBJECT (session_vnc), "vnc-tls-session"); ++} ++ ++static int ++do_read (GrdVncTlsSession *tls_session, ++ char *buf, ++ int len) ++{ ++ do ++ { ++ int ret; ++ ++ ret = gnutls_record_recv (tls_session->tls_session, buf, len); ++ if (ret == GNUTLS_E_AGAIN || ++ ret == GNUTLS_E_INTERRUPTED) ++ { ++ continue; ++ } ++ else if (ret < 0) ++ { ++ g_debug ("gnutls_record_recv failed: %s", gnutls_strerror (ret)); ++ errno = EIO; ++ return -1; ++ } ++ else ++ { ++ return ret; ++ } ++ } ++ while (TRUE); ++} ++ ++static int ++grd_vnc_tls_read_from_socket (rfbClientPtr rfb_client, ++ char *buf, ++ int len) ++{ ++ GrdSessionVnc *session_vnc = rfb_client->screen->screenData; ++ GrdVncTlsSession *tls_session = ++ grd_vnc_tls_session_from_vnc_session (session_vnc); ++ int to_read = len; ++ int len_read = 0; ++ ++ if (to_read < tls_session->peek_buffer_len) ++ { ++ memcpy (buf, tls_session->peek_buffer, to_read); ++ memmove (buf, ++ tls_session->peek_buffer + to_read, ++ tls_session->peek_buffer_len - to_read); ++ len_read = to_read; ++ to_read = 0; ++ } ++ else ++ { ++ memcpy (buf, ++ tls_session->peek_buffer, ++ tls_session->peek_buffer_len); ++ to_read -= tls_session->peek_buffer_len; ++ len_read = tls_session->peek_buffer_len; ++ ++ g_clear_pointer (&tls_session->peek_buffer, ++ g_free); ++ tls_session->peek_buffer_len = 0; ++ tls_session->peek_buffer_size = 0; ++ } ++ ++ if (to_read > 0) ++ { ++ int ret; ++ ++ ret = do_read (tls_session, buf + len_read, to_read); ++ if (ret == -1) ++ return -1; ++ ++ len_read += ret; ++ } ++ ++ return len_read; ++} ++ ++static int ++grd_vnc_tls_peek_at_socket (rfbClientPtr rfb_client, ++ char *buf, ++ int len) ++{ ++ GrdSessionVnc *session_vnc = rfb_client->screen->screenData; ++ GrdVncTlsSession *tls_session = ++ grd_vnc_tls_session_from_vnc_session (session_vnc); ++ int peekable_len; ++ ++ if (tls_session->peek_buffer_len < len) ++ { ++ int ret; ++ ++ if (len > tls_session->peek_buffer_size) ++ { ++ tls_session->peek_buffer = g_renew (char, ++ tls_session->peek_buffer, ++ len); ++ tls_session->peek_buffer_size = len; ++ } ++ ++ ret = do_read (tls_session, ++ tls_session->peek_buffer + tls_session->peek_buffer_len, ++ len - tls_session->peek_buffer_len); ++ if (ret == -1) ++ return -1; ++ ++ tls_session->peek_buffer_len += ret; ++ } ++ ++ peekable_len = MIN (len, tls_session->peek_buffer_len); ++ memcpy (buf, tls_session->peek_buffer, peekable_len); ++ ++ return peekable_len; ++} ++ ++static rfbBool ++grd_vnc_tls_has_pending_on_socket (rfbClientPtr rfb_client) ++{ ++ GrdSessionVnc *session_vnc = rfb_client->screen->screenData; ++ GrdVncTlsSession *tls_session = ++ grd_vnc_tls_session_from_vnc_session (session_vnc); ++ ++ if (tls_session->peek_buffer_len > 0) ++ return TRUE; ++ ++ if (gnutls_record_check_pending (tls_session->tls_session) > 0) ++ return TRUE; ++ ++ return FALSE; ++} ++ ++static int ++grd_vnc_tls_write_to_socket (rfbClientPtr rfb_client, ++ const char *buf, ++ int len) ++{ ++ GrdSessionVnc *session_vnc = rfb_client->screen->screenData; ++ GrdVncTlsSession *tls_session = ++ grd_vnc_tls_session_from_vnc_session (session_vnc); ++ ++ do ++ { ++ int ret; ++ ++ ret = gnutls_record_send (tls_session->tls_session, buf, len); ++ if (ret == GNUTLS_E_AGAIN || ++ ret == GNUTLS_E_INTERRUPTED) ++ { ++ continue; ++ } ++ else if (ret < 0) ++ { ++ g_debug ("gnutls_record_send failed: %s", gnutls_strerror (ret)); ++ errno = EIO; ++ return -1; ++ } ++ else ++ { ++ return ret; ++ } ++ } ++ while (TRUE); ++} ++ ++static gboolean ++perform_handshake (GrdSessionVnc *session_vnc, ++ GError **error) ++{ ++ GrdVncTlsSession *tls_session = ++ grd_vnc_tls_session_from_vnc_session (session_vnc); ++ ++ switch (tls_session->handshake_state) ++ { ++ case GRD_TLS_HANDSHAKE_STATE_INIT: ++ if (!perform_anon_tls_handshake (tls_session, error)) ++ return FALSE; ++ break; ++ case GRD_TLS_HANDSHAKE_STATE_DURING: ++ if (!continue_tls_handshake (tls_session, error)) ++ return FALSE; ++ break; ++ case GRD_TLS_HANDSHAKE_STATE_FINISHED: ++ break; ++ } ++ ++ switch (tls_session->handshake_state) ++ { ++ case GRD_TLS_HANDSHAKE_STATE_INIT: ++ break; ++ case GRD_TLS_HANDSHAKE_STATE_DURING: ++ break; ++ case GRD_TLS_HANDSHAKE_STATE_FINISHED: ++ grd_session_vnc_ungrab_socket (session_vnc, tls_handshake_grab_func); ++ rfbSendSecurityTypeList (grd_session_vnc_get_rfb_client (session_vnc), ++ RFB_SECURITY_TAG_CHANNEL); ++ break; ++ } ++ ++ return TRUE; ++} ++ ++static gboolean ++tls_handshake_grab_func (GrdSessionVnc *session_vnc, ++ GError **error) ++{ ++ g_autoptr (GError) handshake_error = NULL; ++ ++ if (!perform_handshake (session_vnc, &handshake_error)) ++ { ++ g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, ++ "TLS handshake failed: %s", handshake_error->message); ++ return FALSE; ++ } ++ ++ return TRUE; ++} ++ ++static void ++rfb_tls_security_handler (rfbClientPtr rfb_client) ++{ ++ GrdSessionVnc *session_vnc = rfb_client->screen->screenData; ++ GrdVncTlsSession *tls_session; ++ g_autoptr(GError) error = NULL; ++ ++ tls_session = grd_vnc_tls_session_from_vnc_session (session_vnc); ++ if (!tls_session) ++ { ++ GrdVncServer *vnc_server = grd_session_vnc_get_vnc_server (session_vnc); ++ ++ tls_session = g_new0 (GrdVncTlsSession, 1); ++ tls_session->fd = grd_session_vnc_get_fd (session_vnc); ++ tls_session->tls_context = ensure_tls_context (vnc_server); ++ g_object_set_data_full (G_OBJECT (session_vnc), "vnc-tls-session", ++ tls_session, ++ (GDestroyNotify) grd_vnc_tls_session_free); ++ ++ rfb_client->readFromSocket = grd_vnc_tls_read_from_socket; ++ rfb_client->peekAtSocket = grd_vnc_tls_peek_at_socket; ++ rfb_client->hasPendingOnSocket = grd_vnc_tls_has_pending_on_socket; ++ rfb_client->writeToSocket = grd_vnc_tls_write_to_socket; ++ ++ grd_session_vnc_grab_socket (session_vnc, tls_handshake_grab_func); ++ } ++ ++ if (!perform_handshake (session_vnc, &error)) ++ { ++ g_warning ("TLS handshake failed: %s", error->message); ++ rfbCloseClient (rfb_client); ++ } ++} ++ ++static rfbSecurityHandler anon_tls_security_handler = { ++ .type = rfbTLS, ++ .handler = rfb_tls_security_handler, ++ .securityTags = RFB_SECURITY_TAG_CHANNEL, ++}; ++ ++rfbSecurityHandler * ++grd_vnc_tls_get_security_handler (void) ++{ ++ return &anon_tls_security_handler; ++} +diff --git a/src/grd-vnc-tls.h b/src/grd-vnc-tls.h +new file mode 100644 +index 0000000..135ef8c +--- /dev/null ++++ b/src/grd-vnc-tls.h +@@ -0,0 +1,28 @@ ++/* ++ * Copyright (C) 2018 Red Hat Inc. ++ * ++ * 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. ++ * ++ */ ++ ++#ifndef GRD_VNC_TLS_H ++#define GRD_VNC_TLS_H ++ ++#include ++ ++rfbSecurityHandler * grd_vnc_tls_get_security_handler (void); ++ ++#endif /* GRD_VNC_TLS_H */ +diff --git a/src/meson.build b/src/meson.build +index 70e2102..b633ad7 100644 +--- a/src/meson.build ++++ b/src/meson.build +@@ -19,6 +19,8 @@ daemon_sources = files([ + 'grd-vnc-pipewire-stream.h', + 'grd-vnc-server.c', + 'grd-vnc-server.h', ++ 'grd-vnc-tls.c', ++ 'grd-vnc-tls.h', + ]) + + gen_daemon_sources = [] +@@ -49,7 +51,8 @@ executable('gnome-remote-desktop-daemon', + pipewire_dep, + libvncserver_dep, + libsecret_dep, +- libnotify_dep], ++ libnotify_dep, ++ gnutls_dep], + include_directories: [configinc], + install: true, + install_dir: libexecdir) +diff --git a/src/org.gnome.desktop.remote-desktop.gschema.xml b/src/org.gnome.desktop.remote-desktop.gschema.xml +index a5c2022..846e65b 100644 +--- a/src/org.gnome.desktop.remote-desktop.gschema.xml ++++ b/src/org.gnome.desktop.remote-desktop.gschema.xml +@@ -23,5 +23,15 @@ + * password - by requiring the remote client to provide a known password + + ++ ++ ['tls-anon'] ++ Allowed encryption method to use ++ ++ Allowed encryption methods. Includes the following: ++ ++ * none - no encryption ++ * tls-anon - anonymous (unauthenticated) TLS ++ ++ + + +-- +2.17.1 + diff --git a/gnome-remote-desktop.spec b/gnome-remote-desktop.spec index 31f1c9e..f127ad6 100644 --- a/gnome-remote-desktop.spec +++ b/gnome-remote-desktop.spec @@ -1,13 +1,19 @@ %global systemd_unit gnome-remote-desktop.service Name: gnome-remote-desktop -Version: 0.1.4 -Release: 2%{?dist} +Version: 0.1.6 +Release: 1%{?dist} Summary: GNOME Remote Desktop screen share service License: GPLv2+ URL: https://gitlab.gnome.org/jadahl/gnome-remote-desktop -Source0: https://gitlab.gnome.org/jadahl/gnome-remote-desktop/uploads/8d66149c2dfd665aae283f4fd809dc6f/gnome-remote-desktop-0.1.4.tar.xz +Source0: https://gitlab.gnome.org/jadahl/gnome-remote-desktop/uploads/c6862c12f0b741714d5a27e0693322fe/gnome-remote-desktop-0.1.6.tar.xz + +# Adds encryption support (requires patched LibVNCServer) +Patch0: 0001-vnc-Add-anonymous-TLS-encryption-support.patch + +# Align pipewire requirement with Fedora +Patch1: 0001-meson.build-Bump-pipewire-requirement-to-0.2.2.patch BuildRequires: meson >= 0.36.0 BuildRequires: pkgconfig @@ -28,7 +34,7 @@ GNOME desktop environment. %prep -%autosetup +%autosetup -S git %build