2002-06-29 15:46:34 +02:00
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/* plaintext.c - process plaintext packets
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* Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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1997-11-18 15:06:00 +01:00
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*
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1998-12-23 13:41:40 +01:00
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* This file is part of GnuPG.
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1997-11-18 15:06:00 +01:00
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*
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1998-12-23 13:41:40 +01:00
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* GnuPG is free software; you can redistribute it and/or modify
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1997-11-18 15:06:00 +01:00
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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 2 of the License, or
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* (at your option) any later version.
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*
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1998-12-23 13:41:40 +01:00
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* GnuPG is distributed in the hope that it will be useful,
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1997-11-18 15:06:00 +01:00
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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1999-01-07 18:05:48 +01:00
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#include <assert.h>
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2000-07-28 18:19:07 +02:00
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#ifdef HAVE_DOSISH_SYSTEM
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#include <fcntl.h> /* for setmode() */
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#endif
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1997-11-18 15:06:00 +01:00
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#include "util.h"
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2002-06-29 15:46:34 +02:00
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#include "memory.h"
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1997-11-18 15:06:00 +01:00
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#include "options.h"
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#include "packet.h"
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#include "ttyio.h"
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1997-11-24 12:04:11 +01:00
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#include "filter.h"
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1997-12-23 18:30:18 +01:00
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#include "main.h"
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1998-08-08 21:27:00 +02:00
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#include "status.h"
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1998-03-09 22:44:06 +01:00
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#include "i18n.h"
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1997-11-18 15:06:00 +01:00
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1998-07-08 11:29:43 +02:00
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1997-11-18 15:06:00 +01:00
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/****************
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1997-11-24 12:04:11 +01:00
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* Handle a plaintext packet. If MFX is not NULL, update the MDs
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* Note: we should use the filter stuff here, but we have to add some
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* easy mimic to set a read limit, so we calculate only the
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* bytes from the plaintext.
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1997-11-18 15:06:00 +01:00
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*/
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int
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1998-07-08 11:29:43 +02:00
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handle_plaintext( PKT_plaintext *pt, md_filter_context_t *mfx,
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int nooutput, int clearsig )
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1997-11-18 15:06:00 +01:00
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{
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1998-06-25 12:19:08 +02:00
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char *fname = NULL;
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1997-11-18 15:06:00 +01:00
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FILE *fp = NULL;
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int rc = 0;
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int c;
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1998-02-12 00:22:09 +01:00
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int convert = pt->mode == 't';
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1997-11-18 15:06:00 +01:00
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/* create the filename as C string */
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1998-06-25 12:19:08 +02:00
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if( nooutput )
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;
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else if( opt.outfile ) {
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2002-06-29 15:46:34 +02:00
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fname = m_alloc( strlen( opt.outfile ) + 1);
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1997-11-18 15:06:00 +01:00
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strcpy(fname, opt.outfile );
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}
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1998-09-29 18:15:15 +02:00
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else if( pt->namelen == 8 && !memcmp( pt->name, "_CONSOLE", 8 ) ) {
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log_info(_("data not saved; use option \"--output\" to save it\n"));
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nooutput = 1;
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}
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1999-06-01 16:08:57 +02:00
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else if( !opt.use_embedded_filename ) {
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fname = make_outfile_name( iobuf_get_real_fname(pt->buf) );
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1999-07-01 12:53:35 +02:00
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if( !fname )
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fname = ask_outfile_name( pt->name, pt->namelen );
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1999-06-01 16:08:57 +02:00
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if( !fname ) {
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2002-06-29 15:46:34 +02:00
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rc = G10ERR_CREATE_FILE;
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1999-06-01 16:08:57 +02:00
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goto leave;
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}
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}
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1997-11-18 15:06:00 +01:00
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else {
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1999-07-01 12:53:35 +02:00
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fname = make_printable_string( pt->name, pt->namelen, 0 );
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1997-11-18 15:06:00 +01:00
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}
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1998-06-25 12:19:08 +02:00
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if( nooutput )
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;
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else if( !*fname || (*fname=='-' && !fname[1])) {
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1998-03-09 22:44:06 +01:00
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/* no filename or "-" given; write to stdout */
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1997-12-20 18:23:29 +01:00
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fp = stdout;
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2000-07-28 18:19:07 +02:00
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#ifdef HAVE_DOSISH_SYSTEM
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setmode ( fileno(fp) , O_BINARY );
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#endif
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1997-11-18 15:06:00 +01:00
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}
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2002-06-29 15:46:34 +02:00
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else {
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while( !overwrite_filep (fname) ) {
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char *tmp = ask_outfile_name (NULL, 0);
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if ( !tmp || !*tmp ) {
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m_free (tmp);
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rc = G10ERR_CREATE_FILE;
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goto leave;
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}
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m_free (fname);
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fname = tmp;
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}
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1998-07-14 19:10:28 +02:00
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}
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1997-11-18 15:06:00 +01:00
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1998-06-25 12:19:08 +02:00
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if( fp || nooutput )
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1997-11-18 15:06:00 +01:00
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;
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else if( !(fp = fopen(fname,"wb")) ) {
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2002-06-29 15:46:34 +02:00
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log_error(_("error creating `%s': %s\n"), fname, strerror(errno) );
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rc = G10ERR_CREATE_FILE;
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#ifdef __riscos__
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if (errno == 106)
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log_info("perhaps the output file has the same name as the input file?\n");
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#endif /* __riscos__ */
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1997-11-18 15:06:00 +01:00
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goto leave;
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}
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2002-06-29 15:46:34 +02:00
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if( !pt->is_partial ) {
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/* we have an actual length (which might be zero). */
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1999-01-20 19:10:35 +01:00
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assert( !clearsig );
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1999-06-01 16:08:57 +02:00
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if( convert ) { /* text mode */
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1999-05-31 19:49:37 +02:00
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for( ; pt->len; pt->len-- ) {
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if( (c = iobuf_get(pt->buf)) == -1 ) {
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log_error("Problem reading source (%u bytes remaining)\n",
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(unsigned)pt->len);
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2002-06-29 15:46:34 +02:00
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rc = G10ERR_READ_FILE;
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1999-05-31 19:49:37 +02:00
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goto leave;
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}
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if( mfx->md )
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2002-06-29 15:46:34 +02:00
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md_putc(mfx->md, c );
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2000-07-14 19:34:53 +02:00
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#ifndef HAVE_DOSISH_SYSTEM
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if( c == '\r' ) /* convert to native line ending */
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continue; /* fixme: this hack might be too simple */
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#endif
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1999-05-31 19:49:37 +02:00
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if( fp ) {
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if( putc( c, fp ) == EOF ) {
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log_error("Error writing to `%s': %s\n",
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fname, strerror(errno) );
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2002-06-29 15:46:34 +02:00
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rc = G10ERR_WRITE_FILE;
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1999-05-31 19:49:37 +02:00
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goto leave;
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}
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}
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1997-11-18 15:06:00 +01:00
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}
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1999-05-31 19:49:37 +02:00
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}
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1999-06-01 16:08:57 +02:00
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else { /* binary mode */
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2002-06-29 15:46:34 +02:00
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byte *buffer = m_alloc( 32768 );
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1999-05-31 19:49:37 +02:00
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while( pt->len ) {
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int len = pt->len > 32768 ? 32768 : pt->len;
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len = iobuf_read( pt->buf, buffer, len );
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if( len == -1 ) {
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log_error("Problem reading source (%u bytes remaining)\n",
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(unsigned)pt->len);
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2002-06-29 15:46:34 +02:00
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rc = G10ERR_READ_FILE;
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m_free( buffer );
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1998-06-25 12:19:08 +02:00
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goto leave;
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}
|
1999-05-31 19:49:37 +02:00
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if( mfx->md )
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2002-06-29 15:46:34 +02:00
|
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md_write( mfx->md, buffer, len );
|
1999-05-31 19:49:37 +02:00
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if( fp ) {
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if( fwrite( buffer, 1, len, fp ) != len ) {
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log_error("Error writing to `%s': %s\n",
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fname, strerror(errno) );
|
2002-06-29 15:46:34 +02:00
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rc = G10ERR_WRITE_FILE;
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m_free( buffer );
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1999-05-31 19:49:37 +02:00
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goto leave;
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}
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|
|
|
}
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|
pt->len -= len;
|
1997-11-18 15:06:00 +01:00
|
|
|
}
|
2002-06-29 15:46:34 +02:00
|
|
|
m_free( buffer );
|
1997-11-18 15:06:00 +01:00
|
|
|
}
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|
|
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}
|
1999-01-20 19:10:35 +01:00
|
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|
else if( !clearsig ) {
|
1999-06-01 16:08:57 +02:00
|
|
|
if( convert ) { /* text mode */
|
1999-05-31 19:49:37 +02:00
|
|
|
while( (c = iobuf_get(pt->buf)) != -1 ) {
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|
|
|
if( mfx->md )
|
2002-06-29 15:46:34 +02:00
|
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|
md_putc(mfx->md, c );
|
2000-07-14 19:34:53 +02:00
|
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#ifndef HAVE_DOSISH_SYSTEM
|
1999-05-31 19:49:37 +02:00
|
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|
if( convert && c == '\r' )
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|
continue; /* fixme: this hack might be too simple */
|
2000-07-14 19:34:53 +02:00
|
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|
#endif
|
1999-05-31 19:49:37 +02:00
|
|
|
if( fp ) {
|
|
|
|
if( putc( c, fp ) == EOF ) {
|
|
|
|
log_error("Error writing to `%s': %s\n",
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|
|
|
fname, strerror(errno) );
|
2002-06-29 15:46:34 +02:00
|
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|
rc = G10ERR_WRITE_FILE;
|
1999-05-31 19:49:37 +02:00
|
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|
goto leave;
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|
|
|
}
|
|
|
|
}
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|
|
|
}
|
|
|
|
}
|
1999-06-01 16:08:57 +02:00
|
|
|
else { /* binary mode */
|
2002-06-29 15:46:34 +02:00
|
|
|
byte *buffer = m_alloc( 32768 );
|
1999-09-03 10:15:32 +02:00
|
|
|
int eof;
|
|
|
|
for( eof=0; !eof; ) {
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|
|
|
/* Why do we check for len < 32768:
|
2000-07-14 19:34:53 +02:00
|
|
|
* If we won't, we would practically read 2 EOFs but
|
1999-09-03 10:15:32 +02:00
|
|
|
* the first one has already popped the block_filter
|
|
|
|
* off and therefore we don't catch the boundary.
|
2000-07-14 19:34:53 +02:00
|
|
|
* So, always assume EOF if iobuf_read returns less bytes
|
1999-09-03 10:15:32 +02:00
|
|
|
* then requested */
|
1999-05-31 19:49:37 +02:00
|
|
|
int len = iobuf_read( pt->buf, buffer, 32768 );
|
|
|
|
if( len == -1 )
|
|
|
|
break;
|
1999-09-03 10:15:32 +02:00
|
|
|
if( len < 32768 )
|
|
|
|
eof = 1;
|
1999-05-31 19:49:37 +02:00
|
|
|
if( mfx->md )
|
2002-06-29 15:46:34 +02:00
|
|
|
md_write( mfx->md, buffer, len );
|
1999-05-31 19:49:37 +02:00
|
|
|
if( fp ) {
|
|
|
|
if( fwrite( buffer, 1, len, fp ) != len ) {
|
|
|
|
log_error("Error writing to `%s': %s\n",
|
|
|
|
fname, strerror(errno) );
|
2002-06-29 15:46:34 +02:00
|
|
|
rc = G10ERR_WRITE_FILE;
|
|
|
|
m_free( buffer );
|
1999-05-31 19:49:37 +02:00
|
|
|
goto leave;
|
|
|
|
}
|
1998-06-25 12:19:08 +02:00
|
|
|
}
|
1997-11-18 15:06:00 +01:00
|
|
|
}
|
2002-06-29 15:46:34 +02:00
|
|
|
m_free( buffer );
|
1997-11-18 15:06:00 +01:00
|
|
|
}
|
1999-01-07 18:05:48 +01:00
|
|
|
pt->buf = NULL;
|
1997-11-18 15:06:00 +01:00
|
|
|
}
|
1999-01-20 19:10:35 +01:00
|
|
|
else { /* clear text signature - don't hash the last cr,lf */
|
|
|
|
int state = 0;
|
|
|
|
|
|
|
|
while( (c = iobuf_get(pt->buf)) != -1 ) {
|
|
|
|
if( fp ) {
|
|
|
|
if( putc( c, fp ) == EOF ) {
|
|
|
|
log_error("Error writing to `%s': %s\n",
|
|
|
|
fname, strerror(errno) );
|
2002-06-29 15:46:34 +02:00
|
|
|
rc = G10ERR_WRITE_FILE;
|
1999-01-20 19:10:35 +01:00
|
|
|
goto leave;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if( !mfx->md )
|
|
|
|
continue;
|
|
|
|
if( state == 2 ) {
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(mfx->md, '\r' );
|
|
|
|
md_putc(mfx->md, '\n' );
|
1999-01-20 19:10:35 +01:00
|
|
|
state = 0;
|
|
|
|
}
|
|
|
|
if( !state ) {
|
|
|
|
if( c == '\r' )
|
|
|
|
state = 1;
|
2000-07-14 19:34:53 +02:00
|
|
|
else if( c == '\n' )
|
|
|
|
state = 2;
|
1999-01-20 19:10:35 +01:00
|
|
|
else
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(mfx->md, c );
|
1999-01-20 19:10:35 +01:00
|
|
|
}
|
|
|
|
else if( state == 1 ) {
|
|
|
|
if( c == '\n' )
|
|
|
|
state = 2;
|
|
|
|
else {
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(mfx->md, '\r' );
|
1999-01-20 19:10:35 +01:00
|
|
|
if( c == '\r' )
|
|
|
|
state = 1;
|
|
|
|
else {
|
|
|
|
state = 0;
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(mfx->md, c );
|
1999-01-20 19:10:35 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
pt->buf = NULL;
|
|
|
|
}
|
1997-11-18 15:06:00 +01:00
|
|
|
|
|
|
|
if( fp && fp != stdout && fclose(fp) ) {
|
1998-12-29 14:47:31 +01:00
|
|
|
log_error("Error closing `%s': %s\n", fname, strerror(errno) );
|
1997-11-18 15:06:00 +01:00
|
|
|
fp = NULL;
|
2002-06-29 15:46:34 +02:00
|
|
|
rc = G10ERR_WRITE_FILE;
|
1997-11-18 15:06:00 +01:00
|
|
|
goto leave;
|
|
|
|
}
|
|
|
|
fp = NULL;
|
|
|
|
|
|
|
|
leave:
|
|
|
|
if( fp && fp != stdout )
|
|
|
|
fclose(fp);
|
2002-06-29 15:46:34 +02:00
|
|
|
m_free(fname);
|
1997-11-18 15:06:00 +01:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
1999-09-03 10:15:32 +02:00
|
|
|
static void
|
2002-06-29 15:46:34 +02:00
|
|
|
do_hash( MD_HANDLE md, MD_HANDLE md2, IOBUF fp, int textmode )
|
1999-09-03 10:15:32 +02:00
|
|
|
{
|
|
|
|
text_filter_context_t tfx;
|
|
|
|
int c;
|
|
|
|
|
|
|
|
if( textmode ) {
|
|
|
|
memset( &tfx, 0, sizeof tfx);
|
|
|
|
iobuf_push_filter( fp, text_filter, &tfx );
|
|
|
|
}
|
|
|
|
if( md2 ) { /* work around a strange behaviour in pgp2 */
|
|
|
|
/* It seems that at least PGP5 converts a single CR to a CR,LF too */
|
|
|
|
int lc = -1;
|
|
|
|
while( (c = iobuf_get(fp)) != -1 ) {
|
|
|
|
if( c == '\n' && lc == '\r' )
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(md2, c);
|
1999-09-03 10:15:32 +02:00
|
|
|
else if( c == '\n' ) {
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(md2, '\r');
|
|
|
|
md_putc(md2, c);
|
1999-09-03 10:15:32 +02:00
|
|
|
}
|
|
|
|
else if( c != '\n' && lc == '\r' ) {
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(md2, '\n');
|
|
|
|
md_putc(md2, c);
|
1999-09-03 10:15:32 +02:00
|
|
|
}
|
|
|
|
else
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(md2, c);
|
1999-09-03 10:15:32 +02:00
|
|
|
|
|
|
|
if( md )
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(md, c );
|
1999-09-03 10:15:32 +02:00
|
|
|
lc = c;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
while( (c = iobuf_get(fp)) != -1 ) {
|
|
|
|
if( md )
|
2002-06-29 15:46:34 +02:00
|
|
|
md_putc(md, c );
|
1999-09-03 10:15:32 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
1997-12-03 11:20:03 +01:00
|
|
|
|
|
|
|
/****************
|
|
|
|
* Ask for the detached datafile and calculate the digest from it.
|
1997-12-23 18:30:18 +01:00
|
|
|
* INFILE is the name of the input file.
|
1997-12-03 11:20:03 +01:00
|
|
|
*/
|
|
|
|
int
|
2002-06-29 15:46:34 +02:00
|
|
|
ask_for_detached_datafile( MD_HANDLE md, MD_HANDLE md2,
|
1999-08-31 17:30:12 +02:00
|
|
|
const char *inname, int textmode )
|
1997-12-03 11:20:03 +01:00
|
|
|
{
|
1997-12-23 18:30:18 +01:00
|
|
|
char *answer = NULL;
|
|
|
|
IOBUF fp;
|
1997-12-03 11:20:03 +01:00
|
|
|
int rc = 0;
|
|
|
|
|
1997-12-23 18:30:18 +01:00
|
|
|
fp = open_sigfile( inname ); /* open default file */
|
1998-02-12 00:22:09 +01:00
|
|
|
if( !fp && !opt.batch ) {
|
1997-12-23 18:30:18 +01:00
|
|
|
int any=0;
|
1999-10-26 14:14:37 +02:00
|
|
|
tty_printf(_("Detached signature.\n"));
|
1997-12-23 18:30:18 +01:00
|
|
|
do {
|
2002-06-29 15:46:34 +02:00
|
|
|
m_free(answer);
|
1998-11-27 12:42:49 +01:00
|
|
|
answer = cpr_get("detached_signature.filename",
|
|
|
|
_("Please enter name of data file: "));
|
1998-08-08 21:27:00 +02:00
|
|
|
cpr_kill_prompt();
|
1997-12-23 18:30:18 +01:00
|
|
|
if( any && !*answer ) {
|
2002-06-29 15:46:34 +02:00
|
|
|
rc = G10ERR_READ_FILE;
|
1997-12-23 18:30:18 +01:00
|
|
|
goto leave;
|
|
|
|
}
|
|
|
|
fp = iobuf_open(answer);
|
|
|
|
if( !fp && errno == ENOENT ) {
|
|
|
|
tty_printf("No such file, try again or hit enter to quit.\n");
|
|
|
|
any++;
|
|
|
|
}
|
|
|
|
else if( !fp ) {
|
1998-12-29 14:47:31 +01:00
|
|
|
log_error("can't open `%s': %s\n", answer, strerror(errno) );
|
2002-06-29 15:46:34 +02:00
|
|
|
rc = G10ERR_READ_FILE;
|
1997-12-23 18:30:18 +01:00
|
|
|
goto leave;
|
|
|
|
}
|
|
|
|
} while( !fp );
|
1997-12-03 11:20:03 +01:00
|
|
|
}
|
|
|
|
|
1998-02-12 00:22:09 +01:00
|
|
|
if( !fp ) {
|
1998-02-26 17:56:31 +01:00
|
|
|
if( opt.verbose )
|
1998-11-10 13:59:59 +01:00
|
|
|
log_info(_("reading stdin ...\n"));
|
1999-08-31 17:30:12 +02:00
|
|
|
fp = iobuf_open( NULL );
|
|
|
|
assert(fp);
|
1997-12-03 11:20:03 +01:00
|
|
|
}
|
1999-08-31 17:30:12 +02:00
|
|
|
do_hash( md, md2, fp, textmode );
|
|
|
|
iobuf_close(fp);
|
|
|
|
|
1997-12-03 11:20:03 +01:00
|
|
|
|
|
|
|
leave:
|
2002-06-29 15:46:34 +02:00
|
|
|
m_free(answer);
|
1997-12-03 11:20:03 +01:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
1998-07-14 19:10:28 +02:00
|
|
|
|
1998-03-09 22:44:06 +01:00
|
|
|
/****************
|
|
|
|
* Hash the given files and append the hash to hash context md.
|
|
|
|
* If FILES is NULL, hash stdin.
|
|
|
|
*/
|
|
|
|
int
|
2002-06-29 15:46:34 +02:00
|
|
|
hash_datafiles( MD_HANDLE md, MD_HANDLE md2, STRLIST files,
|
1998-07-14 19:10:28 +02:00
|
|
|
const char *sigfilename, int textmode )
|
1998-03-09 22:44:06 +01:00
|
|
|
{
|
|
|
|
IOBUF fp;
|
2002-06-29 15:46:34 +02:00
|
|
|
STRLIST sl;
|
1998-03-09 22:44:06 +01:00
|
|
|
|
1998-07-14 19:10:28 +02:00
|
|
|
if( !files ) {
|
1999-01-16 09:29:29 +01:00
|
|
|
/* check whether we can open the signed material */
|
1998-07-14 19:10:28 +02:00
|
|
|
fp = open_sigfile( sigfilename );
|
|
|
|
if( fp ) {
|
1999-05-19 16:12:26 +02:00
|
|
|
do_hash( md, md2, fp, textmode );
|
1998-07-14 19:10:28 +02:00
|
|
|
iobuf_close(fp);
|
|
|
|
return 0;
|
|
|
|
}
|
2002-06-29 15:46:34 +02:00
|
|
|
log_error (_("no signed data\n"));
|
|
|
|
return G10ERR_OPEN_FILE;
|
1998-07-14 19:10:28 +02:00
|
|
|
}
|
1998-03-09 22:44:06 +01:00
|
|
|
|
2002-06-29 15:46:34 +02:00
|
|
|
|
|
|
|
for (sl=files; sl; sl = sl->next ) {
|
1998-03-09 22:44:06 +01:00
|
|
|
fp = iobuf_open( sl->d );
|
|
|
|
if( !fp ) {
|
1998-12-29 14:47:31 +01:00
|
|
|
log_error(_("can't open signed data `%s'\n"),
|
1998-03-09 22:44:06 +01:00
|
|
|
print_fname_stdin(sl->d));
|
2002-06-29 15:46:34 +02:00
|
|
|
return G10ERR_OPEN_FILE;
|
1998-03-09 22:44:06 +01:00
|
|
|
}
|
1999-05-19 16:12:26 +02:00
|
|
|
do_hash( md, md2, fp, textmode );
|
1998-03-09 22:44:06 +01:00
|
|
|
iobuf_close(fp);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2002-06-29 15:46:34 +02:00
|
|
|
|
|
|
|
|
|
|
|
|