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350
g10/export.c
350
g10/export.c
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/* export.c
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* Copyright (C) 1998, 1999, 2000, 2001, 2002 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, unsigned int options );
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static int do_export_stream( IOBUF out, STRLIST users,
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int secret, unsigned int options, int *any );
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int
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parse_export_options(char *str,unsigned int *options)
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{
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char *tok;
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int hit=0;
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struct
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{
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char *name;
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unsigned int bit;
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} export_opts[]=
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{
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{"include-non-rfc",EXPORT_INCLUDE_NON_RFC},
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{"include-local-sigs",EXPORT_INCLUDE_LOCAL_SIGS},
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{"include-attributes",EXPORT_INCLUDE_ATTRIBUTES},
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{"include-sensitive-revkeys",EXPORT_INCLUDE_SENSITIVE_REVKEYS},
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{NULL,0}
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/* add tags for include revoked and disabled? */
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};
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while((tok=strsep(&str," ,")))
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{
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int i,rev=0;
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if(ascii_strncasecmp("no-",tok,3)==0)
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{
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rev=1;
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tok+=3;
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}
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for(i=0;export_opts[i].name;i++)
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{
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if(ascii_strcasecmp(export_opts[i].name,tok)==0)
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{
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if(rev)
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*options&=~export_opts[i].bit;
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else
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*options|=export_opts[i].bit;
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hit=1;
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break;
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}
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}
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if(!hit && !export_opts[i].name)
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return 0;
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}
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return hit;
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}
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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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* options are defined in main.h.
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* If USERS is NULL, the complete ring will be exported. */
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int
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export_pubkeys( STRLIST users, unsigned int options )
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{
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return do_export( users, 0, options );
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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, unsigned int options )
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{
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int any, rc;
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rc = do_export_stream( out, users, 0, options, &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, unsigned int options )
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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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compress_filter_context_t zfx;
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memset( &afx, 0, sizeof afx);
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memset( &zfx, 0, sizeof zfx);
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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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if( opt.compress_keys && opt.compress )
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iobuf_push_filter( out, compress_filter, &zfx );
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rc = do_export_stream( out, users, secret, options, &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,
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unsigned int options, int *any )
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{
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int rc = 0;
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PACKET pkt;
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KBNODE keyblock = NULL;
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KBNODE kbctx, node;
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int ndesc;
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KEYDB_SEARCH_DESC *desc = NULL;
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KEYDB_HANDLE kdbhd;
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STRLIST sl;
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*any = 0;
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init_packet( &pkt );
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kdbhd = keydb_new (secret);
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if (!users) {
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ndesc = 1;
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desc = m_alloc_clear ( ndesc * sizeof *desc);
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desc[0].mode = KEYDB_SEARCH_MODE_FIRST;
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}
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else {
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for (ndesc=0, sl=users; sl; sl = sl->next, ndesc++)
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;
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desc = m_alloc ( ndesc * sizeof *desc);
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for (ndesc=0, sl=users; sl; sl = sl->next) {
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if (classify_user_id (sl->d, desc+ndesc))
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ndesc++;
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else
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log_error (_("key `%s' not found: %s\n"),
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sl->d, g10_errstr (G10ERR_INV_USER_ID));
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}
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/* it would be nice to see which of the given users did
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actually match one in the keyring. To implement this we
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need to have a found flag for each entry in desc and to set
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this we must check all those entries after a match to mark
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all matched one - currently we stop at the first match. To
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do this we need an extra flag to enable this feature so */
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}
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while (!(rc = keydb_search (kdbhd, desc, ndesc))) {
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int sha1_warned=0;
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u32 sk_keyid[2];
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if (!users)
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desc[0].mode = KEYDB_SEARCH_MODE_NEXT;
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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( !(options&EXPORT_INCLUDE_NON_RFC) &&
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(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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node=find_kbnode( keyblock, PKT_SECRET_KEY );
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if(node)
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{
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PKT_secret_key *sk=node->pkt->pkt.secret_key;
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keyid_from_sk(sk,sk_keyid);
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/* we can't apply GNU mode 1001 on an unprotected key */
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if( secret == 2 && !sk->is_protected )
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{
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log_info(_("key %08lX: not protected - skipped\n"),
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(ulong)sk_keyid[1]);
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continue;
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}
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/* no v3 keys with GNU mode 1001 */
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if( secret == 2 && sk->version == 3 )
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{
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log_info(_("key %08lX: PGP 2.x style key - skipped\n"),
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(ulong)sk_keyid[1]);
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continue;
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}
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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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if( node->pkt->pkttype == PKT_SIGNATURE ) {
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/* do not export packets which are marked as not exportable */
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if( !(options&EXPORT_INCLUDE_LOCAL_SIGS) &&
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!node->pkt->pkt.signature->flags.exportable )
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continue; /* not exportable */
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/* Do not export packets with a "sensitive" revocation
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key unless the user wants us to. Note that we do
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export these when issuing the actual revocation (see
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revoke.c). */
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if( !(options&EXPORT_INCLUDE_SENSITIVE_REVKEYS) &&
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node->pkt->pkt.signature->revkey ) {
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int i;
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for(i=0;i<node->pkt->pkt.signature->numrevkeys;i++)
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if(node->pkt->pkt.signature->revkey[i]->class & 0x40)
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break;
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if(i<node->pkt->pkt.signature->numrevkeys)
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continue;
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}
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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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/* Don't export attribs? */
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if( !(options&EXPORT_INCLUDE_ATTRIBUTES) &&
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node->pkt->pkttype == PKT_USER_ID &&
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node->pkt->pkt.user_id->attrib_data ) {
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/* Skip until we get to something that is not an attrib
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or a signature on an attrib */
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while(kbctx->next && kbctx->next->pkt->pkttype==PKT_SIGNATURE) {
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kbctx=kbctx->next;
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}
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continue;
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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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/* Warn the user if the secret key or any of the secret
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subkeys are protected with SHA1 and we have
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simple_sk_checksum set. */
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if(!sha1_warned && opt.simple_sk_checksum &&
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(node->pkt->pkttype==PKT_SECRET_KEY ||
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node->pkt->pkttype==PKT_SECRET_SUBKEY) &&
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node->pkt->pkt.secret_key->protect.sha1chk)
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{
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/* I hope this warning doesn't confuse people. */
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log_info("WARNING: secret key %08lX does not have a "
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"simple SK checksum\n",(ulong)sk_keyid[1]);
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sha1_warned=1;
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}
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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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m_free(desc);
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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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