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6a46cbcc5c
This makes it impossible to read from stdin without controlling tty: 10:/mnt # echo -e passwd\\npasswd | setsid ./grub-mkpasswd-pbkdf2 Enter password: Reenter password: ./grub-mkpasswd-pbkdf2: error: failure to read password. 10:/mnt
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006
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* 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/crypto.h>
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#include <grub/mm.h>
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#include <grub/term.h>
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#include <termios.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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int
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grub_password_get (char buf[], unsigned buf_size)
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{
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FILE *in;
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struct termios s, t;
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int tty_changed = 0;
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char *ptr;
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grub_refresh ();
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/* Disable echoing. Based on glibc. */
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in = fopen ("/dev/tty", "w+c");
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if (in == NULL)
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in = stdin;
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if (tcgetattr (fileno (in), &t) == 0)
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{
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/* Save the old one. */
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s = t;
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/* Tricky, tricky. */
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t.c_lflag &= ~(ECHO|ISIG);
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tty_changed = (tcsetattr (fileno (in), TCSAFLUSH, &t) == 0);
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}
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else
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tty_changed = 0;
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grub_memset (buf, 0, buf_size);
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if (!fgets (buf, buf_size, stdin))
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{
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if (in != stdin)
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fclose (in);
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return 0;
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}
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ptr = buf + strlen (buf) - 1;
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while (buf <= ptr && (*ptr == '\n' || *ptr == '\r'))
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*ptr-- = 0;
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/* Restore the original setting. */
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if (tty_changed)
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(void) tcsetattr (fileno (in), TCSAFLUSH, &s);
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grub_xputs ("\n");
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grub_refresh ();
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if (in != stdin)
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fclose (in);
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return 1;
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}
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