grub/commands/password.c

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C
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2009-08-24 23:55:06 +00:00
/*
* 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/>.
*/
#include <grub/auth.h>
#include <grub/list.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/env.h>
#include <grub/normal.h>
#include <grub/dl.h>
static grub_dl_t my_mod;
static grub_err_t
check_password (const char *user,
void *password)
{
char entered[1024];
grub_memset (entered, 0, sizeof (entered));
if (!GRUB_GET_PASSWORD (entered, sizeof (entered) - 1))
return GRUB_ACCESS_DENIED;
if (grub_auth_strcmp (entered, password) != 0)
return GRUB_ACCESS_DENIED;
grub_auth_authenticate (user);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_cmd_password (grub_command_t cmd __attribute__ ((unused)),
int argc, char **args)
{
grub_err_t err;
char *pass;
if (argc != 2)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Two arguments expected.");
pass = grub_strdup (args[1]);
if (!pass)
return grub_errno;
err = grub_auth_register_authentication (args[0], check_password, pass);
if (err)
{
grub_free (pass);
return err;
}
grub_dl_ref (my_mod);
return GRUB_ERR_NONE;
}
static grub_command_t cmd;
GRUB_MOD_INIT(password)
{
my_mod = mod;
cmd = grub_register_command ("password", grub_cmd_password,
"password USER PASSWORD",
"Set user password (plaintext). "
"Unrecommended and insecure.");
}
GRUB_MOD_FINI(password)
{
grub_unregister_command (cmd);
}