GUACAMOLE-381: Merge add parameters for disabling clipboard copy/paste.

src/protocols/kubernetes/kubernetes.c

@@ -237,7 +237,7 @@ void* guac_kubernetes_client_thread(void* data) {
 
     /* Create terminal */
     kubernetes_client->term = guac_terminal_create(client,
-            kubernetes_client->clipboard,
+            kubernetes_client->clipboard, settings->disable_copy,
             settings->max_scrollback, settings->font_name, settings->font_size,
             settings->resolution, settings->width, settings->height,
             settings->color_scheme, settings->backspace);

src/protocols/kubernetes/settings.c

@@ -50,6 +50,8 @@ const char* GUAC_KUBERNETES_CLIENT_ARGS[] = {
     "read-only",
     "backspace",
     "scrollback",
+    "disable-copy",
+    "disable-paste",
     NULL
 };
 
@@ -216,6 +218,20 @@ enum KUBERNETES_ARGS_IDX {
      */
     IDX_SCROLLBACK,
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set to "true",
+     * it will not be possible to copy data from the terminal to the client
+     * using the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_COPY,
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set to "true", it
+     * will not be possible to paste data from the client to the terminal using
+     * the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_PASTE,
+
     KUBERNETES_ARGS_COUNT
 };
 
@@ -364,6 +380,16 @@ guac_kubernetes_settings* guac_kubernetes_parse_args(guac_user* user,
         guac_user_parse_args_int(user, GUAC_KUBERNETES_CLIENT_ARGS, argv,
                 IDX_BACKSPACE, 127);
 
+    /* Parse clipboard copy disable flag */
+    settings->disable_copy =
+        guac_user_parse_args_boolean(user, GUAC_KUBERNETES_CLIENT_ARGS, argv,
+                IDX_DISABLE_COPY, false);
+
+    /* Parse clipboard paste disable flag */
+    settings->disable_paste =
+        guac_user_parse_args_boolean(user, GUAC_KUBERNETES_CLIENT_ARGS, argv,
+                IDX_DISABLE_PASTE, false);
+
     /* Parsing was successful */
     return settings;
 

src/protocols/kubernetes/settings.h

@@ -170,6 +170,20 @@ typedef struct guac_kubernetes_settings {
      */
     int resolution;
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set, it will not
+     * be possible to copy data from the terminal to the client using the
+     * clipboard.
+     */
+    bool disable_copy;
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set, it will not
+     * be possible to paste data from the client to the terminal using the
+     * clipboard.
+     */
+    bool disable_paste;
+
     /**
      * The path in which the typescript should be saved, if enabled. If no
      * typescript should be saved, this will be NULL.

src/protocols/kubernetes/user.c

@@ -79,9 +79,12 @@ int guac_kubernetes_user_join_handler(guac_user* user, int argc, char** argv) {
     /* Only handle events if not read-only */
     if (!settings->read_only) {
 
-        /* General mouse/keyboard/clipboard events */
+        /* General mouse/keyboard events */
         user->key_handler = guac_kubernetes_user_key_handler;
         user->mouse_handler = guac_kubernetes_user_mouse_handler;
+
+        /* Inbound (client to server) clipboard transfer */
+        if (!settings->disable_paste)
             user->clipboard_handler = guac_kubernetes_clipboard_handler;
 
         /* STDIN redirection */

src/protocols/rdp/rdp.c

@@ -240,11 +240,13 @@ BOOL rdp_freerdp_pre_connect(freerdp* instance) {
         guac_rdp_audio_load_plugin(instance->context, dvc_list);
     }
 
-    /* Load clipboard plugin */
-    if (freerdp_channels_load_plugin(channels, instance->settings,
-                "cliprdr", NULL))
+    /* Load clipboard plugin if not disabled */
+    if (!(settings->disable_copy && settings->disable_paste)
+            && freerdp_channels_load_plugin(channels, instance->settings,
+                "cliprdr", NULL)) {
         guac_client_log(client, GUAC_LOG_WARNING,
                 "Failed to load cliprdr plugin. Clipboard will not work.");
+    }
 
     /* If RDPSND/RDPDR required, load them */
     if (settings->printing_enabled

src/protocols/rdp/rdp_cliprdr.c

@@ -230,6 +230,10 @@ void guac_rdp_process_cb_data_response(guac_client* client,
     guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
     char received_data[GUAC_RDP_CLIPBOARD_MAX_LENGTH];
 
+    /* Ignore received text if outbound clipboard transfer is disabled */
+    if (rdp_client->settings->disable_copy)
+        return;
+
     guac_iconv_read* reader;
     const char* input = (char*) event->data;
     char* output = received_data;

src/protocols/rdp/rdp_settings.c

@@ -118,6 +118,8 @@ const char* GUAC_RDP_CLIENT_ARGS[] = {
     "load-balance-info",
 #endif
 
+    "disable-copy",
+    "disable-paste",
     NULL
 };
 
@@ -545,6 +547,20 @@ enum RDP_ARGS_IDX {
     IDX_LOAD_BALANCE_INFO,
 #endif
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set to "true",
+     * it will not be possible to copy data from the remote desktop to the
+     * client using the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_COPY,
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set to "true", it
+     * will not be possible to paste data from the client to the remote desktop
+     * using the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_PASTE,
+
     RDP_ARGS_COUNT
 };
 
@@ -1007,6 +1023,16 @@ guac_rdp_settings* guac_rdp_parse_args(guac_user* user,
                 IDX_LOAD_BALANCE_INFO, NULL);
 #endif
 
+    /* Parse clipboard copy disable flag */
+    settings->disable_copy =
+        guac_user_parse_args_boolean(user, GUAC_RDP_CLIENT_ARGS, argv,
+                IDX_DISABLE_COPY, 0);
+
+    /* Parse clipboard paste disable flag */
+    settings->disable_paste =
+        guac_user_parse_args_boolean(user, GUAC_RDP_CLIENT_ARGS, argv,
+                IDX_DISABLE_PASTE, 0);
+
     /* Success */
     return settings;
 

src/protocols/rdp/rdp_settings.h

@@ -268,6 +268,20 @@ typedef struct guac_rdp_settings {
      */
     char** svc_names;
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set, it will not
+     * be possible to copy data from the remote desktop to the client using the
+     * clipboard.
+     */
+    int disable_copy;
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set, it will not
+     * be possible to paste data from the client to the remote desktop using
+     * the clipboard.
+     */
+    int disable_paste;
+
     /**
      * Whether the desktop wallpaper should be visible. If unset, the desktop
      * wallpaper will be hidden, reducing the amount of bandwidth required.

src/protocols/rdp/user.c

@@ -97,9 +97,12 @@ int guac_rdp_user_join_handler(guac_user* user, int argc, char** argv) {
     /* Only handle events if not read-only */
     if (!settings->read_only) {
 
-        /* General mouse/keyboard/clipboard events */
+        /* General mouse/keyboard events */
         user->mouse_handler = guac_rdp_user_mouse_handler;
         user->key_handler = guac_rdp_user_key_handler;
+
+        /* Inbound (client to server) clipboard transfer */
+        if (!settings->disable_paste)
             user->clipboard_handler = guac_rdp_clipboard_handler;
 
         /* Display size change events */

src/protocols/ssh/settings.c

@@ -62,6 +62,8 @@ const char* GUAC_SSH_CLIENT_ARGS[] = {
     "scrollback",
     "locale",
     "timezone",
+    "disable-copy",
+    "disable-paste",
     NULL
 };
 
@@ -258,6 +260,20 @@ enum SSH_ARGS_IDX {
      */
     IDX_TIMEZONE,
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set to "true",
+     * it will not be possible to copy data from the terminal to the client
+     * using the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_COPY,
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set to "true", it
+     * will not be possible to paste data from the client to the terminal using
+     * the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_PASTE,
+
     SSH_ARGS_COUNT
 };
 
@@ -426,6 +442,16 @@ guac_ssh_settings* guac_ssh_parse_args(guac_user* user,
         guac_user_parse_args_string(user, GUAC_SSH_CLIENT_ARGS, argv,
                 IDX_TIMEZONE, NULL);
 
+    /* Parse clipboard copy disable flag */
+    settings->disable_copy =
+        guac_user_parse_args_boolean(user, GUAC_SSH_CLIENT_ARGS, argv,
+                IDX_DISABLE_COPY, false);
+
+    /* Parse clipboard paste disable flag */
+    settings->disable_paste =
+        guac_user_parse_args_boolean(user, GUAC_SSH_CLIENT_ARGS, argv,
+                IDX_DISABLE_PASTE, false);
+
     /* Parsing was successful */
     return settings;
 

src/protocols/ssh/settings.h

@@ -155,6 +155,20 @@ typedef struct guac_ssh_settings {
      */
     int resolution;
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set, it will not
+     * be possible to copy data from the terminal to the client using the
+     * clipboard.
+     */
+    bool disable_copy;
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set, it will not
+     * be possible to paste data from the client to the terminal using the
+     * clipboard.
+     */
+    bool disable_paste;
+
     /**
      * Whether SFTP is enabled.
      */

src/protocols/ssh/ssh.c

@@ -207,9 +207,10 @@ void* ssh_client_thread(void* data) {
 
     /* Create terminal */
     ssh_client->term = guac_terminal_create(client, ssh_client->clipboard,
-            settings->max_scrollback, settings->font_name, settings->font_size,
-            settings->resolution, settings->width, settings->height,
-            settings->color_scheme, settings->backspace);
+            settings->disable_copy, settings->max_scrollback,
+            settings->font_name, settings->font_size, settings->resolution,
+            settings->width, settings->height, settings->color_scheme,
+            settings->backspace);
 
     /* Fail if terminal init failed */
     if (ssh_client->term == NULL) {

src/protocols/ssh/user.c

@@ -80,9 +80,12 @@ int guac_ssh_user_join_handler(guac_user* user, int argc, char** argv) {
     /* Only handle events if not read-only */
     if (!settings->read_only) {
 
-        /* General mouse/keyboard/clipboard events */
+        /* General mouse/keyboard events */
         user->key_handler = guac_ssh_user_key_handler;
         user->mouse_handler = guac_ssh_user_mouse_handler;
+
+        /* Inbound (client to server) clipboard transfer */
+        if (!settings->disable_paste)
             user->clipboard_handler = guac_ssh_clipboard_handler;
 
         /* STDIN redirection */

src/protocols/telnet/settings.c

@@ -55,6 +55,8 @@ const char* GUAC_TELNET_CLIENT_ARGS[] = {
     "scrollback",
     "login-success-regex",
     "login-failure-regex",
+    "disable-copy",
+    "disable-paste",
     NULL
 };
 
@@ -216,6 +218,20 @@ enum TELNET_ARGS_IDX {
      */
     IDX_LOGIN_FAILURE_REGEX,
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set to "true",
+     * it will not be possible to copy data from the terminal to the client
+     * using the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_COPY,
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set to "true", it
+     * will not be possible to paste data from the client to the terminal using
+     * the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_PASTE,
+
     TELNET_ARGS_COUNT
 };
 
@@ -428,6 +444,16 @@ guac_telnet_settings* guac_telnet_parse_args(guac_user* user,
         guac_user_parse_args_string(user, GUAC_TELNET_CLIENT_ARGS, argv,
                 IDX_TERMINAL_TYPE, "linux");
 
+    /* Parse clipboard copy disable flag */
+    settings->disable_copy =
+        guac_user_parse_args_boolean(user, GUAC_TELNET_CLIENT_ARGS, argv,
+                IDX_DISABLE_COPY, false);
+
+    /* Parse clipboard paste disable flag */
+    settings->disable_paste =
+        guac_user_parse_args_boolean(user, GUAC_TELNET_CLIENT_ARGS, argv,
+                IDX_DISABLE_PASTE, false);
+
     /* Parsing was successful */
     return settings;
 

src/protocols/telnet/settings.h

@@ -171,6 +171,20 @@ typedef struct guac_telnet_settings {
      */
     int resolution;
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set, it will not
+     * be possible to copy data from the terminal to the client using the
+     * clipboard.
+     */
+    bool disable_copy;
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set, it will not
+     * be possible to paste data from the client to the terminal using the
+     * clipboard.
+     */
+    bool disable_paste;
+
     /**
      * The path in which the typescript should be saved, if enabled. If no
      * typescript should be saved, this will be NULL.

src/protocols/telnet/telnet.c

@@ -568,7 +568,7 @@ void* guac_telnet_client_thread(void* data) {
 
     /* Create terminal */
     telnet_client->term = guac_terminal_create(client,
-            telnet_client->clipboard,
+            telnet_client->clipboard, settings->disable_copy,
             settings->max_scrollback, settings->font_name, settings->font_size,
             settings->resolution, settings->width, settings->height,
             settings->color_scheme, settings->backspace);

src/protocols/telnet/user.c

@@ -79,9 +79,12 @@ int guac_telnet_user_join_handler(guac_user* user, int argc, char** argv) {
     /* Only handle events if not read-only */
     if (!settings->read_only) {
 
-        /* General mouse/keyboard/clipboard events */
+        /* General mouse/keyboard events */
         user->key_handler = guac_telnet_user_key_handler;
         user->mouse_handler = guac_telnet_user_mouse_handler;
+
+        /* Inbound (client to server) clipboard transfer */
+        if (!settings->disable_paste)
             user->clipboard_handler = guac_telnet_clipboard_handler;
 
         /* STDIN redirection */

src/protocols/vnc/clipboard.c

@@ -125,6 +125,10 @@ void guac_vnc_cut_text(rfbClient* client, const char* text, int textlen) {
     guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY);
     guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data;
 
+    /* Ignore received text if outbound clipboard transfer is disabled */
+    if (vnc_client->settings->disable_copy)
+        return;
+
     char received_data[GUAC_VNC_CLIPBOARD_MAX_LENGTH];
 
     const char* input = text;

src/protocols/vnc/settings.c

@@ -77,7 +77,8 @@ const char* GUAC_VNC_CLIENT_ARGS[] = {
     "recording-exclude-mouse",
     "recording-include-keys",
     "create-recording-path",
-
+    "disable-copy",
+    "disable-paste",
     NULL
 };
 
@@ -298,6 +299,20 @@ enum VNC_ARGS_IDX {
      */
     IDX_CREATE_RECORDING_PATH,
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set to "true",
+     * it will not be possible to copy data from the remote desktop to the
+     * client using the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_COPY,
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set to "true", it
+     * will not be possible to paste data from the client to the remote desktop
+     * using the clipboard. By default, clipboard access is not blocked.
+     */
+    IDX_DISABLE_PASTE,
+
     VNC_ARGS_COUNT
 };
 
@@ -493,6 +508,16 @@ guac_vnc_settings* guac_vnc_parse_args(guac_user* user,
         guac_user_parse_args_boolean(user, GUAC_VNC_CLIENT_ARGS, argv,
                 IDX_CREATE_RECORDING_PATH, false);
 
+    /* Parse clipboard copy disable flag */
+    settings->disable_copy =
+        guac_user_parse_args_boolean(user, GUAC_VNC_CLIENT_ARGS, argv,
+                IDX_DISABLE_COPY, false);
+
+    /* Parse clipboard paste disable flag */
+    settings->disable_paste =
+        guac_user_parse_args_boolean(user, GUAC_VNC_CLIENT_ARGS, argv,
+                IDX_DISABLE_PASTE, false);
+
     return settings;
 
 }

src/protocols/vnc/settings.h

@@ -127,6 +127,20 @@ typedef struct guac_vnc_settings {
      */
     char* clipboard_encoding;
 
+    /**
+     * Whether outbound clipboard access should be blocked. If set, it will not
+     * be possible to copy data from the remote desktop to the client using the
+     * clipboard.
+     */
+    bool disable_copy;
+
+    /**
+     * Whether inbound clipboard access should be blocked. If set, it will not
+     * be possible to paste data from the client to the remote desktop using
+     * the clipboard.
+     */
+    bool disable_paste;
+
 #ifdef ENABLE_COMMON_SSH
     /**
      * Whether SFTP should be enabled for the VNC connection.

src/protocols/vnc/user.c

@@ -91,9 +91,12 @@ int guac_vnc_user_join_handler(guac_user* user, int argc, char** argv) {
     /* Only handle events if not read-only */
     if (!settings->read_only) {
 
-        /* General mouse/keyboard/clipboard events */
+        /* General mouse/keyboard events */
         user->mouse_handler = guac_vnc_user_mouse_handler;
         user->key_handler = guac_vnc_user_key_handler;
+
+        /* Inbound (client to server) clipboard transfer */
+        if (!settings->disable_paste)
             user->clipboard_handler = guac_vnc_clipboard_handler;
 
 #ifdef ENABLE_COMMON_SSH

src/terminal/select.c

@@ -375,8 +375,10 @@ void guac_terminal_select_end(guac_terminal* terminal) {
     }
 
     /* Send data */
+    if (!terminal->disable_copy) {
         guac_common_clipboard_send(terminal->clipboard, client);
         guac_socket_flush(socket);
+    }
 
     guac_terminal_notify(terminal);
 

src/terminal/terminal.c

@@ -306,8 +306,8 @@ void* guac_terminal_thread(void* data) {
 }
 
 guac_terminal* guac_terminal_create(guac_client* client,
-        guac_common_clipboard* clipboard, int max_scrollback,
-        const char* font_name, int font_size, int dpi,
+        guac_common_clipboard* clipboard, bool disable_copy,
+        int max_scrollback, const char* font_name, int font_size, int dpi,
         int width, int height, const char* color_scheme,
         const int backspace) {
 
@@ -404,6 +404,7 @@ guac_terminal* guac_terminal_create(guac_client* client,
     term->current_attributes = default_char.attributes;
     term->default_char = default_char;
     term->clipboard = clipboard;
+    term->disable_copy = disable_copy;
 
     /* Calculate character size */
     int rows    = height / term->display->char_height;

src/terminal/terminal/terminal.h

@@ -511,6 +511,14 @@ struct guac_terminal {
      */
     char backspace;
 
+    /**
+     * Whether copying from the terminal clipboard should be blocked. If set,
+     * the contents of the terminal can still be copied, but will be usable
+     * only within the terminal itself. The clipboard contents will not be
+     * automatically streamed to the client.
+     */
+    bool disable_copy;
+
 };
 
 /**
@@ -533,6 +541,12 @@ struct guac_terminal {
  *     clipboard instructions. This clipboard will not be automatically
  *     freed when this terminal is freed.
  *
+ * @param disable_copy
+ *     Whether copying from the terminal clipboard should be blocked. If set,
+ *     the contents of the terminal can still be copied, but will be usable
+ *     only within the terminal itself. The clipboard contents will not be
+ *     automatically streamed to the client.
+ *
  * @param max_scrollback
  *     The maximum number of rows to allow within the scrollback buffer. The
  *     user may still alter the size of the scrollback buffer using terminal
@@ -575,8 +589,8 @@ struct guac_terminal {
  *     which renders all text to the given client.
  */
 guac_terminal* guac_terminal_create(guac_client* client,
-        guac_common_clipboard* clipboard, int max_scrollback,
-        const char* font_name, int font_size, int dpi,
+        guac_common_clipboard* clipboard, bool disable_copy,
+        int max_scrollback, const char* font_name, int font_size, int dpi,
         int width, int height, const char* color_scheme,
         const int backspace);