mirror of
git://git.gnupg.org/gnupg.git
synced 2024-06-01 22:28:02 +02:00
18fd4964f6
now use the identical implementation from ../common/membuf.c. * pksign.c (agent_pksign): Changed arg OUTFP to OUTBUF and use membuf functions to return the value. * pkdecrypt.c (agent_pkdecrypt): Ditto. * genkey.c (agent_genkey): Ditto. * command.c (cmd_pksign, cmd_pkdecrypt, cmd_genkey): Replaced assuan_get_data_fp() by a the membuf scheme. (clear_outbuf, write_and_clear_outbuf): New. * membuf.c (put_membuf): Wipe out buffer after a failed realloc.
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/* membuf.c - A simple implementation of a dynamic buffer
|
|
* Copyright (C) 2001, 2003 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 2 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
|
|
#include "membuf.h"
|
|
|
|
#include "util.h"
|
|
|
|
|
|
/* A simple implementation of a dynamic buffer. Use init_membuf() to
|
|
create a buffer, put_membuf to append bytes and get_membuf to
|
|
release and return the buffer. Allocation errors are detected but
|
|
only returned at the final get_membuf(), this helps not to clutter
|
|
the code with out of core checks. */
|
|
|
|
void
|
|
init_membuf (membuf_t *mb, int initiallen)
|
|
{
|
|
mb->len = 0;
|
|
mb->size = initiallen;
|
|
mb->out_of_core = 0;
|
|
mb->buf = xtrymalloc (initiallen);
|
|
if (!mb->buf)
|
|
mb->out_of_core = errno;
|
|
}
|
|
|
|
|
|
void
|
|
put_membuf (membuf_t *mb, const void *buf, size_t len)
|
|
{
|
|
if (mb->out_of_core)
|
|
return;
|
|
|
|
if (mb->len + len >= mb->size)
|
|
{
|
|
char *p;
|
|
|
|
mb->size += len + 1024;
|
|
p = xtryrealloc (mb->buf, mb->size);
|
|
if (!p)
|
|
{
|
|
mb->out_of_core = errno;
|
|
/* Wipe out what we already accumulated. This is required
|
|
in case we are storing sensitive data here. The membuf
|
|
API does not provide another way to cleanup after an
|
|
error. */
|
|
memset (mb->buf, 0, mb->len);
|
|
return;
|
|
}
|
|
mb->buf = p;
|
|
}
|
|
memcpy (mb->buf + mb->len, buf, len);
|
|
mb->len += len;
|
|
}
|
|
|
|
|
|
void *
|
|
get_membuf (membuf_t *mb, size_t *len)
|
|
{
|
|
char *p;
|
|
|
|
if (mb->out_of_core)
|
|
{
|
|
xfree (mb->buf);
|
|
mb->buf = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
p = mb->buf;
|
|
*len = mb->len;
|
|
mb->buf = NULL;
|
|
mb->out_of_core = ENOMEM; /* hack to make sure it won't get reused. */
|
|
return p;
|
|
}
|