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gnupg/g10/plaintext.c

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/* plaintext.c - process an plaintext packet
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* Copyright (C) 1998 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
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
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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
* 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 "util.h"
#include "memory.h"
#include "options.h"
#include "packet.h"
#include "ttyio.h"
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#include "filter.h"
#include "main.h"
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#include "i18n.h"
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/****************
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* 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.
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*/
int
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handle_plaintext( PKT_plaintext *pt, md_filter_context_t *mfx )
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{
char *fname;
FILE *fp = NULL;
int rc = 0;
int c;
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int convert = pt->mode == 't';
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/* create the filename as C string */
if( opt.outfile ) {
fname = m_alloc( strlen( opt.outfile ) + 1);
strcpy(fname, opt.outfile );
}
else {
fname = m_alloc( pt->namelen +1 );
memcpy( fname, pt->name, pt->namelen );
fname[pt->namelen] = 0;
}
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if( !*fname || (*fname=='-' && !fname[1])) {
/* no filename or "-" given; write to stdout */
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fp = stdout;
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}
else if( overwrite_filep( fname ) )
goto leave;
if( fp )
;
else if( !(fp = fopen(fname,"wb")) ) {
log_error("Error creating '%s': %s\n", fname, strerror(errno) );
rc = G10ERR_WRITE_FILE;
goto leave;
}
if( pt->len ) {
for( ; pt->len; pt->len-- ) {
if( (c = iobuf_get(pt->buf)) == -1 ) {
log_error("Problem reading source\n");
rc = G10ERR_READ_FILE;
goto leave;
}
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if( mfx->md )
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md_putc(mfx->md, c );
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if( convert && c == '\r' )
continue; /* FIXME: this hack is too simple */
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if( putc( c, fp ) == EOF ) {
log_error("Error writing to '%s': %s\n", fname, strerror(errno) );
rc = G10ERR_WRITE_FILE;
goto leave;
}
}
}
else {
while( (c = iobuf_get(pt->buf)) != -1 ) {
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if( mfx->md )
md_putc(mfx->md, c );
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if( convert && c == '\r' )
continue; /* FIXME: this hack is too simple */
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if( putc( c, fp ) == EOF ) {
log_error("Error writing to '%s': %s\n",
fname, strerror(errno) );
rc = G10ERR_WRITE_FILE;
goto leave;
}
}
iobuf_clear_eof(pt->buf);
}
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;
}
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/****************
* Ask for the detached datafile and calculate the digest from it.
* INFILE is the name of the input file.
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*/
int
ask_for_detached_datafile( md_filter_context_t *mfx, const char *inname )
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{
char *answer = NULL;
IOBUF fp;
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int rc = 0;
int c;
fp = open_sigfile( inname ); /* open default file */
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if( !fp && !opt.batch ) {
int any=0;
tty_printf("Detached signature.\n");
do {
m_free(answer);
answer = tty_get("Please enter name of data file: ");
tty_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 );
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}
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if( !fp ) {
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if( opt.verbose )
log_info("reading stdin ...\n");
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while( (c = getchar()) != EOF ) {
if( mfx->md )
md_putc(mfx->md, c );
}
}
else {
while( (c = iobuf_get(fp)) != -1 ) {
if( mfx->md )
md_putc(mfx->md, c );
}
iobuf_close(fp);
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}
leave:
m_free(answer);
return rc;
}
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/****************
* Hash the given files and append the hash to hash context md.
* If FILES is NULL, hash stdin.
*/
int
hash_datafiles( MD_HANDLE md, STRLIST files, int textmode )
{
IOBUF fp;
STRLIST sl=NULL;
text_filter_context_t tfx;
int c;
if( !files )
add_to_strlist( &sl, "-");
else
sl = files;
for( ; 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));
if( !files )
free_strlist(sl);
return G10ERR_OPEN_FILE;
}
if( textmode ) {
memset( &tfx, 0, sizeof tfx);
iobuf_push_filter( fp, text_filter, &tfx );
}
while( (c = iobuf_get(fp)) != -1 )
md_putc(md, c );
iobuf_close(fp);
}
if( !files )
free_strlist(sl);
return 0;
}