Added MD5 passwords and extended the password command.

stage2/md5.h

@@ -0,0 +1,34 @@
+/* md5.h - an implementation of the MD5 algorithm and MD5 crypt */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2000  Free Software Foundation, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Initialize the buffers to compute a new md5 checksum.  This will
+   destroy any previously calculated md5 sum. */
+extern void md5_init(void);
+
+/* Digestify the given input.  This may be called multiple times. */
+extern void md5_update(const char *input, int inputlen);
+
+/* Calculate the 16 byte md5 check sum.  The result will be valid until
+   the next md5_init(). */
+extern unsigned char* md5_final(void);
+
+/* Check a md5 password for validity.  Returns 0 if password was
+   correct, and a value != 0 for error, similarly to strcmp. */
+extern int check_md5_password (const char* key, const char* crypted);