mirror of git://git.gnupg.org/gnupg.git
142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
/* decrypt.c - verify signed data
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* Copyright (C) 1998,1999,2000,2001,2002,2003 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
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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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* 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
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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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#include <assert.h>
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#include "options.h"
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#include "packet.h"
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#include "errors.h"
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#include "iobuf.h"
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#include "keydb.h"
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#include "memory.h"
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#include "util.h"
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#include "main.h"
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#include "status.h"
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#include "i18n.h"
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/****************
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* Assume that the input is an encrypted message and decrypt
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* (and if signed, verify the signature on) it.
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* This command differs from the default operation, as it never
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* writes to the filename which is included in the file and it
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* rejects files which don't begin with an encrypted message.
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*/
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int
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decrypt_message( const char *filename )
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{
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IOBUF fp;
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armor_filter_context_t afx;
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progress_filter_context_t pfx;
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int rc;
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int no_out=0;
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/* open the message file */
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fp = iobuf_open(filename);
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if( !fp ) {
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log_error(_("can't open `%s'\n"), print_fname_stdin(filename));
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return G10ERR_OPEN_FILE;
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}
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handle_progress (&pfx, fp, filename);
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if( !opt.no_armor ) {
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if( use_armor_filter( fp ) ) {
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memset( &afx, 0, sizeof afx);
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iobuf_push_filter( fp, armor_filter, &afx );
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}
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}
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if( !opt.outfile ) {
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no_out = 1;
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opt.outfile = "-";
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}
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rc = proc_encryption_packets( NULL, fp );
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if( no_out )
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opt.outfile = NULL;
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iobuf_close(fp);
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return rc;
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}
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void
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decrypt_messages(int nfiles, char **files)
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{
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IOBUF fp;
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armor_filter_context_t afx;
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progress_filter_context_t pfx;
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char *p, *output = NULL;
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int rc = 0;
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if (opt.outfile)
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{
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log_error(_("--output doesn't work for this command\n"));
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return;
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}
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while (nfiles--)
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{
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print_file_status(STATUS_FILE_START, *files, 3);
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output = make_outfile_name(*files);
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if (!output)
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goto next_file;
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fp = iobuf_open(*files);
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if (!fp)
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{
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log_error(_("can't open `%s'\n"), print_fname_stdin(*files));
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goto next_file;
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}
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handle_progress (&pfx, fp, *files);
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if (!opt.no_armor)
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{
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if (use_armor_filter(fp))
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{
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memset(&afx, 0, sizeof afx);
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iobuf_push_filter(fp, armor_filter, &afx);
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}
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}
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rc = proc_packets(NULL, fp);
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iobuf_close(fp);
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if (rc)
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log_error("%s: decryption failed: %s\n", print_fname_stdin(*files),
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g10_errstr(rc));
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p = get_last_passphrase();
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set_next_passphrase(p);
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m_free (p);
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next_file:
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/* Note that we emit file_done even after an error. */
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write_status( STATUS_FILE_DONE );
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m_free(output);
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files++;
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}
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set_next_passphrase(NULL);
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}
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