2009-08-25 Vladimir Serbinenko <phcoder@gmail.com>

Authentication support.

	* commands/password.c: New file.
	* conf/common.rmk (pkglib_MODULES): Add password.mod.
	(password_mod_SOURCES): New variable.
	(password_mod_CFLAGS): Likewise.
	(password_mod_LDFLAGS): Likewise.
	(normal_mod_SOURCES): Add normal/auth.c.
	* conf/i386-coreboot.rmk (grub_emu_SOURCES): Add commands/password.c and
	normal/auth.c.
	* conf/i386-efi.rmk (grub_emu_SOURCES): Likewise.
	* conf/i386-ieee1275.rmk (grub_emu_SOURCES): Likewise.
	* conf/i386-pc.rmk (grub_emu_SOURCES): Likewise.
	* conf/powerpc-ieee1275.rmk (grub_emu_SOURCES): Likewise.
	* conf/sparc64-ieee1275.rmk (grub_emu_SOURCES): Likewise.
	* conf/x86_64-efi.rmk (grub_emu_SOURCES): Likewise.
	* include/grub/auth.h: New file.
	* include/grub/err.h (grub_err_t): New enum value
	GRUB_ERR_ACCESS_DENIED.
	* include/grub/menu.h (grub_menu_entry): New fields 'restricted' and
	'users'.
	* include/grub/normal.h (grub_cmdline_get): New argument 'history'.
	* normal/cmdline.c (grub_cmdline_get): New argument 'history'. All
	users updated.
	* normal/auth.c: New file.
	* normal/main.c (grub_normal_add_menu_entry): Handle --users option.
	(grub_cmdline_run): Don't allow to go to command line without
	authentication.
	* normal/menu.c (grub_menu_execute_entry): Handle restricted entries.
	* normal/menu_entry.c (grub_menu_entry_run): Don't allow editing
	menuentry without superuser rights.
	* normal/menu_viewer.c (grub_menu_viewer_show_menu): Don't exit if
	user isn't a superuser.

include/grub/auth.h

@@ -0,0 +1,45 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009  Free Software Foundation, Inc.
+ *
+ *  GRUB 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef GRUB_AURH_HEADER
+#define GRUB_AUTH_HEADER	1
+
+#include <grub/err.h>
+
+/* Macros for indistinguishibility.  */
+#define GRUB_ACCESS_DENIED grub_error (GRUB_ERR_ACCESS_DENIED, "Access denied.")
+#define GRUB_GET_PASSWORD(string, len) grub_cmdline_get ("Enter password: ", \
+							 string, len,	\
+							 '*', 0, 0)
+
+/* Like strcmp but untimeable. Accepts NULL as second argument.  */
+int grub_auth_strcmp (const char *user_input, const char *template);
+/* Like strcmp but untimeable and ignores commas in needle.  */
+int grub_auth_strword (const char *haystack, const char *needle);
+
+typedef grub_err_t (*grub_auth_callback_t) (const char*, void *);
+
+grub_err_t grub_auth_register_authentication (const char *user,
+					      grub_auth_callback_t callback,
+					      void *arg);
+grub_err_t grub_auth_unregister_authentication (const char *user);
+
+grub_err_t grub_auth_authenticate (const char *user);
+grub_err_t grub_auth_deauthenticate (const char *user);
+grub_err_t grub_auth_check_authentication (const char *userlist);
+
+#endif /* ! GRUB_AUTH_HEADER */

include/grub/err.h

@@ -53,7 +53,8 @@ typedef enum
     GRUB_ERR_BAD_GZIP_DATA,
     GRUB_ERR_MENU,
     GRUB_ERR_TIMEOUT,
-    GRUB_ERR_IO
+    GRUB_ERR_IO,
+    GRUB_ERR_ACCESS_DENIED
   }
 grub_err_t;
 

include/grub/menu.h

@@ -32,6 +32,12 @@ struct grub_menu_entry
   /* The title name.  */
   const char *title;
 
+  /* If set means not everybody is allowed to boot this entry.  */
+  int restricted;
+
+  /* Allowed users.  */
+  const char *users;
+
   /* The classes associated with the menu entry:
      used to choose an icon or other style attributes.
      This is a dummy head node for the linked list, so for an entry E,

include/grub/normal.h

@@ -56,7 +56,7 @@ void grub_cmdline_run (int nested);
 
 /* Defined in `cmdline.c'.  */
 int grub_cmdline_get (const char *prompt, char cmdline[], unsigned max_len,
-		      int echo_char, int readline);
+		      int echo_char, int readline, int history);
 grub_err_t grub_set_history (int newsize);
 
 /* Defined in `completion.c'.  */