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