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91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/* passphrase.c - Get a passphrase
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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* 2005, 2006, 2007, 2009, 2011 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG 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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* GnuPG 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 this program; if not, see <https://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <unistd.h>
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#include "passphrase.h"
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#include "gpgsm.h"
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#include "../common/shareddefs.h"
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#include "../common/ttyio.h"
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static char *fd_passwd = NULL;
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int
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have_static_passphrase ()
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{
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return (!!fd_passwd
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&& (opt.batch || opt.pinentry_mode == PINENTRY_MODE_LOOPBACK));
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}
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/* Return a static passphrase. The returned value is only valid as
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long as no other passphrase related function is called. NULL may
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be returned if no passphrase has been set; better use
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have_static_passphrase first. */
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const char *
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get_static_passphrase (void)
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{
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return fd_passwd;
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}
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void
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read_passphrase_from_fd (int fd)
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{
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int i, len;
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char *pw;
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if (!opt.batch && opt.pinentry_mode != PINENTRY_MODE_LOOPBACK)
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{ /* Not used but we have to do a dummy read, so that it won't end
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up at the begin of the message if the quite usual trick to
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prepend the passphtrase to the message is used. */
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char buf[1];
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while (!(read (fd, buf, 1) != 1 || *buf == '\n'))
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;
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*buf = 0;
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return;
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}
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for (pw = NULL, i = len = 100; ; i++)
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{
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if (i >= len-1)
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{
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char *pw2 = pw;
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len += 100;
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pw = xmalloc_secure (len);
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if (pw2)
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{
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memcpy (pw, pw2, i);
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xfree (pw2);
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}
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else
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i = 0;
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}
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if (read (fd, pw+i, 1) != 1 || pw[i] == '\n')
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break;
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}
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pw[i] = 0;
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if (!opt.batch && opt.pinentry_mode != PINENTRY_MODE_LOOPBACK)
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tty_printf("\b\b\b \n" );
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xfree (fd_passwd);
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fd_passwd = pw;
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}
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