automake commit without merge history

grub-core/commands/password.c

@@ -0,0 +1,86 @@
+/*
+ *  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/crypto.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>
+#include <grub/i18n.h>
+
+static grub_dl_t my_mod;
+
+static grub_err_t
+check_password (const char *user, const char *entered,
+		void *password)
+{
+  if (grub_crypto_memcmp (entered, password, GRUB_AUTH_MAX_PASSLEN) != 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;
+  int copylen;
+
+  if (argc != 2)
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, "two arguments expected");
+
+  pass = grub_zalloc (GRUB_AUTH_MAX_PASSLEN);
+  if (!pass)
+    return grub_errno;
+  copylen = grub_strlen (args[1]);
+  if (copylen >= GRUB_AUTH_MAX_PASSLEN)
+    copylen = GRUB_AUTH_MAX_PASSLEN - 1;
+  grub_memcpy (pass, args[1], copylen);
+
+  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,
+			       N_("USER PASSWORD"),
+			       N_("Set user password (plaintext). "
+			       "Unrecommended and insecure."));
+}
+
+GRUB_MOD_FINI(password)
+{
+  grub_unregister_command (cmd);
+}