mirror of
git://git.gnupg.org/gnupg.git
synced 2024-12-25 10:49:57 +01:00
418 lines
9.6 KiB
C
418 lines
9.6 KiB
C
/* plaintext.c - process plaintext packets
|
|
* Copyright (C) 1998, 1999, 2000, 2001 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <assert.h>
|
|
#ifdef HAVE_DOSISH_SYSTEM
|
|
#include <fcntl.h> /* for setmode() */
|
|
#endif
|
|
|
|
#include "util.h"
|
|
#include "memory.h"
|
|
#include "options.h"
|
|
#include "packet.h"
|
|
#include "ttyio.h"
|
|
#include "filter.h"
|
|
#include "main.h"
|
|
#include "status.h"
|
|
#include "i18n.h"
|
|
|
|
|
|
|
|
/****************
|
|
* Handle a plaintext packet. If MFX is not NULL, update the MDs
|
|
* Note: we should use the filter stuff here, but we have to add some
|
|
* easy mimic to set a read limit, so we calculate only the
|
|
* bytes from the plaintext.
|
|
*/
|
|
int
|
|
handle_plaintext( PKT_plaintext *pt, md_filter_context_t *mfx,
|
|
int nooutput, int clearsig )
|
|
{
|
|
char *fname = NULL;
|
|
FILE *fp = NULL;
|
|
int rc = 0;
|
|
int c;
|
|
int convert = pt->mode == 't';
|
|
|
|
/* create the filename as C string */
|
|
if( nooutput )
|
|
;
|
|
else if( opt.outfile ) {
|
|
fname = m_alloc( strlen( opt.outfile ) + 1);
|
|
strcpy(fname, opt.outfile );
|
|
}
|
|
else if( pt->namelen == 8 && !memcmp( pt->name, "_CONSOLE", 8 ) ) {
|
|
log_info(_("data not saved; use option \"--output\" to save it\n"));
|
|
nooutput = 1;
|
|
}
|
|
else if( !opt.use_embedded_filename ) {
|
|
fname = make_outfile_name( iobuf_get_real_fname(pt->buf) );
|
|
if( !fname )
|
|
fname = ask_outfile_name( pt->name, pt->namelen );
|
|
if( !fname ) {
|
|
rc = G10ERR_CREATE_FILE;
|
|
goto leave;
|
|
}
|
|
}
|
|
else {
|
|
fname = make_printable_string( pt->name, pt->namelen, 0 );
|
|
}
|
|
|
|
if( nooutput )
|
|
;
|
|
else if( !*fname || (*fname=='-' && !fname[1])) {
|
|
/* no filename or "-" given; write to stdout */
|
|
fp = stdout;
|
|
#ifdef HAVE_DOSISH_SYSTEM
|
|
setmode ( fileno(fp) , O_BINARY );
|
|
#endif
|
|
}
|
|
else {
|
|
while( !overwrite_filep (fname) ) {
|
|
char *tmp = ask_outfile_name (NULL, 0);
|
|
if ( !tmp || !*tmp ) {
|
|
m_free (tmp);
|
|
rc = G10ERR_CREATE_FILE;
|
|
goto leave;
|
|
}
|
|
m_free (fname);
|
|
fname = tmp;
|
|
}
|
|
}
|
|
|
|
if( fp || nooutput )
|
|
;
|
|
else if( !(fp = fopen(fname,"wb")) ) {
|
|
log_error(_("error creating `%s': %s\n"), fname, strerror(errno) );
|
|
rc = G10ERR_CREATE_FILE;
|
|
#ifdef __riscos__
|
|
if (errno == 106)
|
|
log_info("perhaps the output file has the same name as the input file?\n");
|
|
#endif /* __riscos__ */
|
|
goto leave;
|
|
}
|
|
|
|
if( pt->len ) {
|
|
assert( !clearsig );
|
|
if( convert ) { /* text mode */
|
|
for( ; pt->len; pt->len-- ) {
|
|
if( (c = iobuf_get(pt->buf)) == -1 ) {
|
|
log_error("Problem reading source (%u bytes remaining)\n",
|
|
(unsigned)pt->len);
|
|
rc = G10ERR_READ_FILE;
|
|
goto leave;
|
|
}
|
|
if( mfx->md )
|
|
md_putc(mfx->md, c );
|
|
#ifndef HAVE_DOSISH_SYSTEM
|
|
if( c == '\r' ) /* convert to native line ending */
|
|
continue; /* fixme: this hack might be too simple */
|
|
#endif
|
|
if( fp ) {
|
|
if( putc( c, fp ) == EOF ) {
|
|
log_error("Error writing to `%s': %s\n",
|
|
fname, strerror(errno) );
|
|
rc = G10ERR_WRITE_FILE;
|
|
goto leave;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else { /* binary mode */
|
|
byte *buffer = m_alloc( 32768 );
|
|
while( pt->len ) {
|
|
int len = pt->len > 32768 ? 32768 : pt->len;
|
|
len = iobuf_read( pt->buf, buffer, len );
|
|
if( len == -1 ) {
|
|
log_error("Problem reading source (%u bytes remaining)\n",
|
|
(unsigned)pt->len);
|
|
rc = G10ERR_READ_FILE;
|
|
m_free( buffer );
|
|
goto leave;
|
|
}
|
|
if( mfx->md )
|
|
md_write( mfx->md, buffer, len );
|
|
if( fp ) {
|
|
if( fwrite( buffer, 1, len, fp ) != len ) {
|
|
log_error("Error writing to `%s': %s\n",
|
|
fname, strerror(errno) );
|
|
rc = G10ERR_WRITE_FILE;
|
|
m_free( buffer );
|
|
goto leave;
|
|
}
|
|
}
|
|
pt->len -= len;
|
|
}
|
|
m_free( buffer );
|
|
}
|
|
}
|
|
else if( !clearsig ) {
|
|
if( convert ) { /* text mode */
|
|
while( (c = iobuf_get(pt->buf)) != -1 ) {
|
|
if( mfx->md )
|
|
md_putc(mfx->md, c );
|
|
#ifndef HAVE_DOSISH_SYSTEM
|
|
if( convert && c == '\r' )
|
|
continue; /* fixme: this hack might be too simple */
|
|
#endif
|
|
if( fp ) {
|
|
if( putc( c, fp ) == EOF ) {
|
|
log_error("Error writing to `%s': %s\n",
|
|
fname, strerror(errno) );
|
|
rc = G10ERR_WRITE_FILE;
|
|
goto leave;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else { /* binary mode */
|
|
byte *buffer = m_alloc( 32768 );
|
|
int eof;
|
|
for( eof=0; !eof; ) {
|
|
/* Why do we check for len < 32768:
|
|
* If we won't, we would practically read 2 EOFs but
|
|
* the first one has already popped the block_filter
|
|
* off and therefore we don't catch the boundary.
|
|
* So, always assume EOF if iobuf_read returns less bytes
|
|
* then requested */
|
|
int len = iobuf_read( pt->buf, buffer, 32768 );
|
|
if( len == -1 )
|
|
break;
|
|
if( len < 32768 )
|
|
eof = 1;
|
|
if( mfx->md )
|
|
md_write( mfx->md, buffer, len );
|
|
if( fp ) {
|
|
if( fwrite( buffer, 1, len, fp ) != len ) {
|
|
log_error("Error writing to `%s': %s\n",
|
|
fname, strerror(errno) );
|
|
rc = G10ERR_WRITE_FILE;
|
|
m_free( buffer );
|
|
goto leave;
|
|
}
|
|
}
|
|
}
|
|
m_free( buffer );
|
|
}
|
|
pt->buf = NULL;
|
|
}
|
|
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) );
|
|
rc = G10ERR_WRITE_FILE;
|
|
goto leave;
|
|
}
|
|
}
|
|
if( !mfx->md )
|
|
continue;
|
|
if( state == 2 ) {
|
|
md_putc(mfx->md, '\r' );
|
|
md_putc(mfx->md, '\n' );
|
|
state = 0;
|
|
}
|
|
if( !state ) {
|
|
if( c == '\r' )
|
|
state = 1;
|
|
else if( c == '\n' )
|
|
state = 2;
|
|
else
|
|
md_putc(mfx->md, c );
|
|
}
|
|
else if( state == 1 ) {
|
|
if( c == '\n' )
|
|
state = 2;
|
|
else {
|
|
md_putc(mfx->md, '\r' );
|
|
if( c == '\r' )
|
|
state = 1;
|
|
else {
|
|
state = 0;
|
|
md_putc(mfx->md, c );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
pt->buf = NULL;
|
|
}
|
|
|
|
if( fp && fp != stdout && fclose(fp) ) {
|
|
log_error("Error closing `%s': %s\n", fname, strerror(errno) );
|
|
fp = NULL;
|
|
rc = G10ERR_WRITE_FILE;
|
|
goto leave;
|
|
}
|
|
fp = NULL;
|
|
|
|
leave:
|
|
if( fp && fp != stdout )
|
|
fclose(fp);
|
|
m_free(fname);
|
|
return rc;
|
|
}
|
|
|
|
static void
|
|
do_hash( MD_HANDLE md, MD_HANDLE md2, IOBUF fp, int textmode )
|
|
{
|
|
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' )
|
|
md_putc(md2, c);
|
|
else if( c == '\n' ) {
|
|
md_putc(md2, '\r');
|
|
md_putc(md2, c);
|
|
}
|
|
else if( c != '\n' && lc == '\r' ) {
|
|
md_putc(md2, '\n');
|
|
md_putc(md2, c);
|
|
}
|
|
else
|
|
md_putc(md2, c);
|
|
|
|
if( md )
|
|
md_putc(md, c );
|
|
lc = c;
|
|
}
|
|
}
|
|
else {
|
|
while( (c = iobuf_get(fp)) != -1 ) {
|
|
if( md )
|
|
md_putc(md, c );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/****************
|
|
* Ask for the detached datafile and calculate the digest from it.
|
|
* INFILE is the name of the input file.
|
|
*/
|
|
int
|
|
ask_for_detached_datafile( MD_HANDLE md, MD_HANDLE md2,
|
|
const char *inname, int textmode )
|
|
{
|
|
char *answer = NULL;
|
|
IOBUF fp;
|
|
int rc = 0;
|
|
|
|
fp = open_sigfile( inname ); /* open default file */
|
|
if( !fp && !opt.batch ) {
|
|
int any=0;
|
|
tty_printf(_("Detached signature.\n"));
|
|
do {
|
|
m_free(answer);
|
|
answer = cpr_get("detached_signature.filename",
|
|
_("Please enter name of data file: "));
|
|
cpr_kill_prompt();
|
|
if( any && !*answer ) {
|
|
rc = G10ERR_READ_FILE;
|
|
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 ) {
|
|
log_error("can't open `%s': %s\n", answer, strerror(errno) );
|
|
rc = G10ERR_READ_FILE;
|
|
goto leave;
|
|
}
|
|
} while( !fp );
|
|
}
|
|
|
|
if( !fp ) {
|
|
if( opt.verbose )
|
|
log_info(_("reading stdin ...\n"));
|
|
fp = iobuf_open( NULL );
|
|
assert(fp);
|
|
}
|
|
do_hash( md, md2, fp, textmode );
|
|
iobuf_close(fp);
|
|
|
|
|
|
leave:
|
|
m_free(answer);
|
|
return rc;
|
|
}
|
|
|
|
|
|
|
|
/****************
|
|
* Hash the given files and append the hash to hash context md.
|
|
* If FILES is NULL, hash stdin.
|
|
*/
|
|
int
|
|
hash_datafiles( MD_HANDLE md, MD_HANDLE md2, STRLIST files,
|
|
const char *sigfilename, int textmode )
|
|
{
|
|
IOBUF fp;
|
|
STRLIST sl;
|
|
|
|
if( !files ) {
|
|
/* check whether we can open the signed material */
|
|
fp = open_sigfile( sigfilename );
|
|
if( fp ) {
|
|
do_hash( md, md2, fp, textmode );
|
|
iobuf_close(fp);
|
|
return 0;
|
|
}
|
|
log_error (_("no signed data\n"));
|
|
return G10ERR_OPEN_FILE;
|
|
}
|
|
|
|
|
|
for (sl=files; sl; sl = sl->next ) {
|
|
fp = iobuf_open( sl->d );
|
|
if( !fp ) {
|
|
log_error(_("can't open signed data `%s'\n"),
|
|
print_fname_stdin(sl->d));
|
|
return G10ERR_OPEN_FILE;
|
|
}
|
|
do_hash( md, md2, fp, textmode );
|
|
iobuf_close(fp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
|
|
|