mirror of
git://git.gnupg.org/gnupg.git
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096e7457ec
The asymmetric quotes used by GNU in the past (`...') don't render
nicely on modern systems. We now use two \x27 characters ('...').
The proper solution would be to use the correct Unicode symmetric
quotes here. However this has the disadvantage that the system
requires Unicode support. We don't want that today. If Unicode is
available a generated po file can be used to output proper quotes. A
simple sed script like the one used for en@quote is sufficient to
change them.
The changes have been done by applying
sed -i "s/\`\([^'\`]*\)'/'\1'/g"
to most files and fixing obvious problems by hand. The msgid strings in
the po files were fixed with a similar command.
274 lines
6.3 KiB
C
274 lines
6.3 KiB
C
/* decrypt.c - decrypt and verify data
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
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* 2007, 2009 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 3 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, see <http://www.gnu.org/licenses/>.
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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 "gpg.h"
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#include "options.h"
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#include "packet.h"
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#include "status.h"
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#include "iobuf.h"
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#include "keydb.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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/* 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 (ctrl_t ctrl, const char *filename)
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{
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IOBUF fp;
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armor_filter_context_t *afx = NULL;
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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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pfx = new_progress_context ();
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/* Open the message file. */
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fp = iobuf_open (filename);
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if (fp && is_secured_file (iobuf_get_fd (fp)))
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{
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iobuf_close (fp);
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fp = NULL;
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gpg_err_set_errno (EPERM);
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}
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if ( !fp )
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{
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rc = gpg_error_from_syserror ();
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log_error (_("can't open '%s': %s\n"), print_fname_stdin(filename),
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gpg_strerror (rc));
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release_progress_context (pfx);
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return rc;
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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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{
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if ( use_armor_filter( fp ) )
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{
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afx = new_armor_context ();
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push_armor_filter ( afx, fp );
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}
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}
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if (!opt.outfile)
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{
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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 (ctrl, 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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release_armor_context (afx);
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release_progress_context (pfx);
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return rc;
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}
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/* Same as decrypt_message but takes a file descriptor for input and
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output. */
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gpg_error_t
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decrypt_message_fd (ctrl_t ctrl, int input_fd, int output_fd)
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{
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gpg_error_t err;
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IOBUF fp;
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armor_filter_context_t *afx = NULL;
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progress_filter_context_t *pfx;
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if (opt.outfp)
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return gpg_error (GPG_ERR_BUG);
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pfx = new_progress_context ();
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/* Open the message file. */
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fp = iobuf_open_fd_or_name (input_fd, NULL, "rb");
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if (fp && is_secured_file (iobuf_get_fd (fp)))
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{
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iobuf_close (fp);
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fp = NULL;
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gpg_err_set_errno (EPERM);
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}
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if (!fp)
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{
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char xname[64];
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err = gpg_error_from_syserror ();
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snprintf (xname, sizeof xname, "[fd %d]", input_fd);
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log_error (_("can't open '%s': %s\n"), xname, gpg_strerror (err));
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release_progress_context (pfx);
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return err;
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}
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#ifdef HAVE_W32CE_SYSTEM
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#warning Need to fix this if we want to use g13
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opt.outfp = NULL;
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#else
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opt.outfp = es_fdopen_nc (output_fd, "wb");
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#endif
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if (!opt.outfp)
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{
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char xname[64];
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err = gpg_error_from_syserror ();
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snprintf (xname, sizeof xname, "[fd %d]", output_fd);
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log_error (_("can't open '%s': %s\n"), xname, gpg_strerror (err));
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iobuf_close (fp);
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release_progress_context (pfx);
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return err;
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}
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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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afx = new_armor_context ();
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push_armor_filter ( afx, fp );
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}
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}
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err = proc_encryption_packets (ctrl, NULL, fp );
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iobuf_close (fp);
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es_fclose (opt.outfp);
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opt.outfp = NULL;
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release_armor_context (afx);
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release_progress_context (pfx);
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return err;
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}
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void
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decrypt_messages (ctrl_t ctrl, int nfiles, char *files[])
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{
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IOBUF fp;
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armor_filter_context_t *afx = NULL;
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progress_filter_context_t *pfx;
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char *p, *output = NULL;
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int rc=0,use_stdin=0;
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unsigned int lno=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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pfx = new_progress_context ();
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if(!nfiles)
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use_stdin=1;
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for(;;)
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{
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char line[2048];
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char *filename=NULL;
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if(use_stdin)
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{
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if(fgets(line, DIM(line), stdin))
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{
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lno++;
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if (!*line || line[strlen(line)-1] != '\n')
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log_error("input line %u too long or missing LF\n", lno);
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else
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{
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line[strlen(line)-1] = '\0';
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filename=line;
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}
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}
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}
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else
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{
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if(nfiles)
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{
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filename=*files;
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nfiles--;
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files++;
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}
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}
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if(filename==NULL)
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break;
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print_file_status(STATUS_FILE_START, filename, 3);
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output = make_outfile_name(filename);
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if (!output)
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goto next_file;
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fp = iobuf_open(filename);
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if (fp)
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iobuf_ioctl (fp, IOBUF_IOCTL_NO_CACHE, 1, NULL);
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if (fp && is_secured_file (iobuf_get_fd (fp)))
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{
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iobuf_close (fp);
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fp = NULL;
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gpg_err_set_errno (EPERM);
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}
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if (!fp)
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{
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log_error(_("can't open '%s'\n"), print_fname_stdin(filename));
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goto next_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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{
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if (use_armor_filter(fp))
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{
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afx = new_armor_context ();
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push_armor_filter ( afx, fp );
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}
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}
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rc = proc_packets (ctrl,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(filename),
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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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xfree (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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xfree(output);
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reset_literals_seen();
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}
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set_next_passphrase(NULL);
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release_armor_context (afx);
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release_progress_context (pfx);
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}
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