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Add gpgsplit tool
This commit is contained in:
Werner Koch
parent
ae78aed6b6
commit
906c8ca7ca
3
NEWS
3
NEWS
@ -1,3 +1,6 @@
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* New tool gpgsplit to split OpenPGP data formats into packets.
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Noteworthy changes in version 1.0.6 (2001-05-29)
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------------------------------------------------
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3
TODO
3
TODO
@ -64,6 +64,9 @@
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an even log so that other software can display a key history or
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alike with GnuPG results. This should be connected to the keyrings.
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* Using --list-only to check for recipients while decrypting may
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yield an error about an unknown packet.
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Scheduled for 1.1
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-----------------
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@ -1,3 +1,8 @@
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2001-06-20 Werner Koch <wk@gnupg.org>
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* gpgsplit.c: New.
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* Makefile.am (bin_PROGRAMS): Install gpgsplit.
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2001-03-27 Werner Koch <wk@gnupg.org>
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* mail-signed-keys: Add option --dry-run.
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@ -23,6 +23,7 @@ INCLUDES = -I$(top_srcdir)/include -I$(top_srcdir)/intl
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needed_libs = ../cipher/libcipher.a \
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../mpi/libmpi.a ../util/libutil.a @INTLLIBS@
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bin_PROGRAMS = gpgsplit
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noinst_PROGRAMS = mpicalc bftest clean-sat mk-tdata shmtest
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mpicalc_SOURCES = mpicalc.c
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@ -33,11 +34,17 @@ clean_sat_SOURCES = clean-sat.c
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mk_tdata_SOURCES = mk-tdata.c
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shmtest_SOURCES = shmtest.c
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gpgsplit_SOURCES = gpgsplit.c
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mpicalc_LDADD = $(needed_libs)
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bftest_LDADD = $(needed_libs)
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shmtest_LDADD = $(needed_libs)
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gpgsplit_LDADD = $(needed_libs)
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mpicalc bftest shmtest gpgsplit: $(needed_libs)
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mpicalc bftest shmtest: $(needed_libs)
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460
tools/gpgsplit.c
Normal file
460
tools/gpgsplit.c
Normal file
@ -0,0 +1,460 @@
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/* gpgsplit.c - An OpenPGP packet splitting tool
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* Copyright (C) 2001 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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/*
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* TODO: Add an option to uncompress packets. This should come wuite handy.
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*/
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#include <config.h>
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#include <errno.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 <ctype.h>
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#include <unistd.h>
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#include <assert.h>
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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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#include "../g10/packet.h"
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#include "util.h"
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static int opt_verbose;
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static const char *opt_prefix = "";
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static void g10_exit( int rc );
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static void split_packets (const char *fname);
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enum cmd_and_opt_values { aNull = 0,
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oVerbose = 'v',
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oPrefix = 'p',
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aTest };
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static ARGPARSE_OPTS opts[] = {
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{ 301, NULL, 0, "@\nOptions:\n " },
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{ oVerbose, "verbose", 0, "verbose" },
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{ oPrefix, "prefix", 2, "|STRING| Prepend filenames with STRING" },
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{0} };
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const char *
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strusage( int level )
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{
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const char *p;
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switch( level ) {
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case 11: p = "gpgsplit (GnuPG)";
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break;
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case 13: p = VERSION; break;
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case 17: p = PRINTABLE_OS_NAME; break;
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case 19: p =
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"Please report bugs to <bug-gnupg@gnu.org>.\n";
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break;
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case 1:
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case 40: p =
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"Usage: gpgsplit [options] [files] (-h for help)";
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break;
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case 41: p =
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"Syntax: gpgsplit [options] [files]\n"
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"Split an OpenPGP message into packets\n";
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break;
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default: p = default_strusage(level);
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}
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return p;
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}
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int
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main( int argc, char **argv )
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{
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ARGPARSE_ARGS pargs;
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#ifdef HAVE_DOSISH_SYSTEM
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setmode( fileno(stdin), O_BINARY );
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setmode( fileno(stdout), O_BINARY );
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#endif
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log_set_name("gpgsplit");
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags= 1; /* do not remove the args */
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while( optfile_parse( NULL, NULL, NULL, &pargs, opts) ) {
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switch( pargs.r_opt ) {
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case oVerbose: opt_verbose = 1; break;
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case oPrefix: opt_prefix = pargs.r.ret_str; break;
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default : pargs.err = 2; break;
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}
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}
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if( log_get_errorcount(0) )
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g10_exit(2);
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if (!argc)
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split_packets (NULL);
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else {
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for ( ;argc; argc--, argv++)
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split_packets (*argv);
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}
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g10_exit (0);
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return 0;
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}
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static void
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g10_exit( int rc )
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{
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rc = rc? rc : log_get_errorcount(0)? 2 : 0;
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exit(rc );
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}
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static const char *
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pkttype_to_string (int pkttype)
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{
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const char *s;
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switch (pkttype) {
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case PKT_PUBKEY_ENC : s = "pk_enc"; break;
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case PKT_SIGNATURE : s = "sig"; break;
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case PKT_SYMKEY_ENC : s = "sym_enc"; break;
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case PKT_ONEPASS_SIG : s = "onepass_sig"; break;
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case PKT_SECRET_KEY : s = "secret_key"; break;
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case PKT_PUBLIC_KEY : s = "public_key"; break;
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case PKT_SECRET_SUBKEY : s = "secret_subkey"; break;
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case PKT_COMPRESSED : s = "compressed"; break;
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case PKT_ENCRYPTED : s = "encrypted"; break;
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case PKT_MARKER : s = "marker"; break;
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case PKT_PLAINTEXT : s = "plaintext"; break;
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case PKT_RING_TRUST : s = "ring_trust"; break;
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case PKT_USER_ID : s = "user_id"; break;
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case PKT_PUBLIC_SUBKEY : s = "public_subkey"; break;
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case PKT_OLD_COMMENT : s = "old_comment"; break;
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case PKT_PHOTO_ID : s = "photo_id"; break;
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case PKT_ENCRYPTED_MDC : s = "encrypted_mdc"; break;
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case PKT_MDC : s = "mdc"; break;
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case PKT_COMMENT : s = "comment"; break;
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case PKT_GPG_CONTROL : s = "gpg_control"; break;
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default: s = "unknown"; break;
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}
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return s;
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}
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/*
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* Create a new filename and a return a pointer to a statically
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* allocated buffer
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*/
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static char *
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create_filename (int pkttype)
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{
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static unsigned int partno = 0;
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static char *name;
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if (!name)
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name = m_alloc (strlen (opt_prefix) + 100 );
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assert (pkttype < 1000 && pkttype >= 0 );
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partno++;
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sprintf (name, "%s%06u-%03d.%.40s",
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opt_prefix, partno, pkttype, pkttype_to_string (pkttype));
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return name;
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}
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static int
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read_u16 (FILE *fp, size_t *rn)
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{
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int c;
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if ( (c = getc (fp)) == EOF )
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return -1;
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*rn = c << 8;
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if ( (c = getc (fp)) == EOF )
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return -1;
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*rn |= c;
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return 0;
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}
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static int
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read_u32 (FILE *fp, unsigned long *rn)
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{
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size_t tmp;
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if (read_u16 (fp, &tmp))
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return -1;
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*rn = tmp << 16;
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if (read_u16 (fp, &tmp))
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return -1;
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*rn |= tmp;
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return 0;
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}
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/* hdr must pint to a buffer large enough to hold all header bytes */
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static int
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write_part ( const char *fname, FILE *fpin, unsigned long pktlen,
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int pkttype, int partial, unsigned char *hdr, size_t hdrlen)
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{
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FILE *fpout;
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int c, first;
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unsigned char *p;
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const char *outname = create_filename (pkttype);
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/* fixme: should we check that this file does not yet exist? */
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if (opt_verbose)
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log_info ("writing `%s'\n", outname);
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fpout = fopen (outname, "wb");
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if (!fpout) {
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log_error ("error creating `%s': %s\n", outname, strerror(errno));
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/* stop right now, otherwise we would mess up the sequence of
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* the part numbers */
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g10_exit (1);
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}
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for (p=hdr; hdrlen; p++, hdrlen--) {
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if ( putc (*p, fpout) == EOF )
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goto write_error;
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}
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first = 1;
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while (partial) {
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size_t partlen;
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if (partial == 1) { /* openpgp */
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if( first ) {
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c = pktlen;
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assert( c >= 224 && c < 255 );
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first = 0;
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}
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else if( (c = getc (fpin)) == EOF ) {
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goto read_error;
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}
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else
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hdr[hdrlen++] = c;
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if( c < 192 ) {
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pktlen = c;
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partial = 0; /* (last segment may follow) */
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}
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else if( c < 224 ) {
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pktlen = (c - 192) * 256;
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if( (c = getc (fpin)) == EOF )
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goto read_error;
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hdr[hdrlen++] = c;
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pktlen += c + 192;
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partial = 0;
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}
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else if( c == 255 ) {
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if (read_u32 (fpin, &pktlen))
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goto read_error;
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hdr[hdrlen++] = pktlen >> 24;
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hdr[hdrlen++] = pktlen >> 16;
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hdr[hdrlen++] = pktlen >> 8;
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hdr[hdrlen++] = pktlen;
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partial = 0;
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}
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else { /* next partial body length */
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for (p=hdr; hdrlen; p++, hdrlen--) {
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if ( putc (*p, fpout) == EOF )
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goto write_error;
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}
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partlen = 1 << (c & 0x1f);
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for (; partlen; partlen--) {
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if ((c = getc (fpin)) == EOF)
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goto read_error;
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if ( putc (c, fpout) == EOF )
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goto write_error;
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}
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}
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}
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else if (partial == 2) { /* old gnupg */
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assert (!pktlen);
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if ( read_u16 (fpin, &partlen) )
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goto read_error;
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hdr[hdrlen++] = partlen >> 8;
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hdr[hdrlen++] = partlen;
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for (p=hdr; hdrlen; p++, hdrlen--) {
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if ( putc (*p, fpout) == EOF )
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goto write_error;
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}
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if (!partlen)
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partial = 0; /* end of packet */
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for (; partlen; partlen--) {
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c = getc (fpin);
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if (c == EOF)
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goto read_error;
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if ( putc (c, fpout) == EOF )
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goto write_error;
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}
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}
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else { /* compressed: read to end */
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pktlen = 0;
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partial = 0;
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while ( (c=getc (fpin)) != EOF ) {
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if ( putc (c, fpout) == EOF )
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goto write_error;
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}
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if (!feof (fpin))
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goto read_error;
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}
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}
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for (p=hdr; hdrlen; p++, hdrlen--) {
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if ( putc (*p, fpout) == EOF )
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goto write_error;
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}
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/* standard packet or last segment of partial length encoded packet */
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for (; pktlen; pktlen--) {
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c = getc (fpin);
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if (c == EOF)
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goto read_error;
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if ( putc (c, fpout) == EOF )
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goto write_error;
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}
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if ( fclose (fpout) )
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log_error ("error closing `%s': %s\n", outname, strerror (errno));
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return 0;
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write_error:
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log_error ("error writing `%s': %s\n", outname, strerror (errno));
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fclose (fpout);
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return 2;
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read_error: {
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int save = errno;
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fclose (fpout);
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errno = save;
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}
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return -1;
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}
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static int
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do_split (const char *fname, FILE *fp)
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{
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int c, ctb, pkttype;
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unsigned long pktlen = 0;
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int partial = 0;
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unsigned char header[20];
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int header_idx = 0;
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ctb = getc (fp);
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if (ctb == EOF)
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return 3; /* ready */
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header[header_idx++] = ctb;
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if( !(ctb & 0x80) ) {
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log_error("invalid CTB %02x\n", ctb );
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return 1;
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}
|
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if ( (ctb & 0x40) ) { /* new CTB */
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pkttype = (ctb & 0x3f);
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if( (c = getc (fp)) == EOF )
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return -1;
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header[header_idx++] = c;
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|
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if( c < 192 )
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pktlen = c;
|
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else if( c < 224 ) {
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pktlen = (c - 192) * 256;
|
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if( (c = getc (fp)) == EOF )
|
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return -1;
|
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header[header_idx++] = c;
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pktlen += c + 192;
|
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}
|
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else if( c == 255 ) {
|
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if (read_u32 (fp, &pktlen))
|
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return -1;
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header[header_idx++] = pktlen >> 24;
|
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header[header_idx++] = pktlen >> 16;
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header[header_idx++] = pktlen >> 8;
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header[header_idx++] = pktlen;
|
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}
|
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else { /* partial body length */
|
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pktlen = c;
|
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partial = 1;
|
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}
|
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}
|
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else {
|
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int lenbytes;
|
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|
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pkttype = (ctb>>2)&0xf;
|
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lenbytes = ((ctb&3)==3)? 0 : (1<<(ctb & 3));
|
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if( !lenbytes ) {
|
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pktlen = 0; /* don't know the value */
|
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if( pkttype == PKT_COMPRESSED )
|
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partial = 3;
|
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else
|
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partial = 2; /* the old GnuPG partial length encoding */
|
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}
|
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else {
|
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for( ; lenbytes; lenbytes-- ) {
|
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pktlen <<= 8;
|
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if( (c = getc (fp)) == EOF )
|
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return -1;
|
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header[header_idx++] = c;
|
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|
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pktlen |= c;
|
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}
|
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}
|
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}
|
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|
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return write_part (fname, fp, pktlen, pkttype, partial,
|
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header, header_idx);
|
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}
|
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|
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|
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static void
|
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split_packets (const char *fname)
|
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{
|
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FILE *fp;
|
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int rc;
|
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|
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if (!fname || !strcmp (fname, "-")) {
|
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fp = stdin;
|
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fname = "-";
|
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}
|
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else if ( !(fp = fopen (fname,"rb")) ) {
|
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log_error ("can't open `%s': %s\n", fname, strerror (errno));
|
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return;
|
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}
|
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|
||||
while ( !(rc = do_split (fname, fp)) )
|
||||
;
|
||||
if ( rc > 0 )
|
||||
; /* error already handled */
|
||||
else if ( ferror (fp) )
|
||||
log_error ("error reading `%s': %s\n", fname, strerror (errno));
|
||||
else
|
||||
log_error ("premature EOF while reading `%s'\n", fname );
|
||||
|
||||
if ( fp != stdin )
|
||||
fclose (fp);
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user