mirror of
git://git.gnupg.org/gnupg.git
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238 lines
6.3 KiB
C
238 lines
6.3 KiB
C
/* export.c
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* Copyright (C) 1998, 1999, 2000, 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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#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 "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 "i18n.h"
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static int do_export( STRLIST users, int secret, int onlyrfc );
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static int do_export_stream( IOBUF out, STRLIST users,
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int secret, int onlyrfc, int *any );
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/****************
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* Export the public keys (to standard out or --output).
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* Depending on opt.armor the output is armored.
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* If onlyrfc is True only RFC24404 compatible keys are exported.
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* If USERS is NULL, the complete ring will be exported.
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*/
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int
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export_pubkeys( STRLIST users, int onlyrfc )
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{
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return do_export( users, 0, onlyrfc );
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}
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/****************
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* Export to an already opened stream; return -1 if no keys have
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* been exported
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*/
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int
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export_pubkeys_stream( IOBUF out, STRLIST users, int onlyrfc )
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{
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int any, rc;
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rc = do_export_stream( out, users, 0, onlyrfc, &any );
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if( !rc && !any )
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rc = -1;
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return rc;
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}
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int
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export_seckeys( STRLIST users )
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{
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return do_export( users, 1, 0 );
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}
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int
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export_secsubkeys( STRLIST users )
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{
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return do_export( users, 2, 0 );
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}
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static int
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do_export( STRLIST users, int secret, int onlyrfc )
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{
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IOBUF out = NULL;
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int any, rc;
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armor_filter_context_t afx;
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memset( &afx, 0, sizeof afx);
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rc = open_outfile( NULL, 0, &out );
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if( rc )
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return rc;
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if( opt.armor ) {
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afx.what = secret?5:1;
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iobuf_push_filter( out, armor_filter, &afx );
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}
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rc = do_export_stream( out, users, secret, onlyrfc, &any );
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if( rc || !any )
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iobuf_cancel(out);
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else
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iobuf_close(out);
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return rc;
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}
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static int
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do_export_stream( IOBUF out, STRLIST users, int secret, int onlyrfc, int *any )
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{
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int rc = 0;
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compress_filter_context_t zfx;
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PACKET pkt;
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KBNODE keyblock = NULL;
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KBNODE kbctx, node;
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KEYDB_HANDLE kdbhd;
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STRLIST sl;
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int all = !users;
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int all_first = 1;
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*any = 0;
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memset( &zfx, 0, sizeof zfx);
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init_packet( &pkt );
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kdbhd = keydb_new (secret);
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if( opt.compress_keys && opt.compress )
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iobuf_push_filter( out, compress_filter, &zfx );
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/* use the correct sequence. strlist_last,prev do work correctly with
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* NULL pointers :-) */
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for( sl=strlist_last(users); sl || all ; sl=strlist_prev( users, sl )) {
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if( all ) { /* get the next user */
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rc = all_first ? keydb_search_first (kdbhd)
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: keydb_search_next (kdbhd);
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all_first = 0;
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if( rc == -1 ) /* EOF */
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break;
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if( rc ) {
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log_error ("error searching key: %s\n", g10_errstr(rc));
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break;
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}
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}
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else {
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KEYDB_SEARCH_DESC desc;
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classify_user_id (sl->d, &desc);
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rc = desc.mode? keydb_search (kdbhd, &desc, 1):G10ERR_INV_USER_ID;
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if( rc ) {
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log_error (_("key `%s' not found: %s\n"),
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sl->d, g10_errstr (rc));
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rc = 0;
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continue;
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}
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}
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/* read the keyblock */
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rc = keydb_get_keyblock (kdbhd, &keyblock );
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if( rc ) {
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log_error (_("error reading keyblock: %s\n"), g10_errstr(rc) );
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goto leave;
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}
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/* do not export keys which are incompatible with rfc2440 */
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if( onlyrfc && (node = find_kbnode( keyblock, PKT_PUBLIC_KEY )) ) {
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PKT_public_key *pk = node->pkt->pkt.public_key;
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if( pk->version == 3 && pk->pubkey_algo > 3 ) {
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log_info(_("key %08lX: not a rfc2440 key - skipped\n"),
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(ulong)keyid_from_pk( pk, NULL) );
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continue;
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}
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}
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/* we can't apply GNU mode 1001 on an unprotected key */
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if( secret == 2
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&& (node = find_kbnode( keyblock, PKT_SECRET_KEY ))
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&& !node->pkt->pkt.secret_key->is_protected )
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{
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log_info(_("key %08lX: not protected - skipped\n"),
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(ulong)keyid_from_sk( node->pkt->pkt.secret_key, NULL) );
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continue;
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}
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/* and write it */
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for( kbctx=NULL; (node = walk_kbnode( keyblock, &kbctx, 0 )); ) {
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/* don't export any comment packets but those in the
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* secret keyring */
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if( !secret && node->pkt->pkttype == PKT_COMMENT )
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continue;
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/* make sure that ring_trust packets never get exported */
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if (node->pkt->pkttype == PKT_RING_TRUST)
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continue;
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/* do not export packets which are marked as not exportable */
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if( node->pkt->pkttype == PKT_SIGNATURE ) {
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const char *p;
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p = parse_sig_subpkt2( node->pkt->pkt.signature,
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SIGSUBPKT_EXPORTABLE, NULL );
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if( p && !*p )
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continue; /* not exportable */
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/* delete our verification cache */
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delete_sig_subpkt (node->pkt->pkt.signature->unhashed,
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SIGSUBPKT_PRIV_VERIFY_CACHE);
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}
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if( secret == 2 && node->pkt->pkttype == PKT_SECRET_KEY ) {
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/* we don't want to export the secret parts of the
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* primary key, this is done by using GNU protection mode 1001
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*/
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int save_mode = node->pkt->pkt.secret_key->protect.s2k.mode;
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node->pkt->pkt.secret_key->protect.s2k.mode = 1001;
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rc = build_packet( out, node->pkt );
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node->pkt->pkt.secret_key->protect.s2k.mode = save_mode;
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}
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else {
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rc = build_packet( out, node->pkt );
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}
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if( rc ) {
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log_error("build_packet(%d) failed: %s\n",
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node->pkt->pkttype, g10_errstr(rc) );
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rc = G10ERR_WRITE_FILE;
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goto leave;
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}
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}
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++*any;
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}
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if( rc == -1 )
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rc = 0;
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leave:
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keydb_release (kdbhd);
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release_kbnode( keyblock );
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if( !*any )
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log_info(_("WARNING: nothing exported\n"));
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return rc;
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}
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