mirror of
git://git.gnupg.org/gnupg.git
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336 lines
9.2 KiB
C
336 lines
9.2 KiB
C
/* hkp.c - Horrowitz Keyserver Protocol
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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 <ctype.h>
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#include <errno.h>
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#include <assert.h>
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#include "errors.h"
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#include "util.h"
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#include "ttyio.h"
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#include "i18n.h"
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#include "options.h"
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#include "filter.h"
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#include "http.h"
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#include "main.h"
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static int urlencode_filter( void *opaque, int control,
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IOBUF a, byte *buf, size_t *ret_len);
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/****************
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* Try to import the key with KEYID from a keyserver but ask the user
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* before doing so.
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* Returns: 0 the key was successfully imported
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* -1 key not found on server or user does not want to
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* import the key
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* or other error codes.
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*/
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int
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hkp_ask_import( u32 *keyid, void *stats_handle)
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{
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struct http_context hd;
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char *request;
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int rc;
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unsigned int hflags = opt.honor_http_proxy? HTTP_FLAG_TRY_PROXY : 0;
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if( !opt.keyserver_name )
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return -1;
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log_info(_("requesting key %08lX from %s ...\n"), (ulong)keyid[1],
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opt.keyserver_name );
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request = m_alloc( strlen( opt.keyserver_name ) + 100 );
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/* hkp does not accept the long keyid - we should really write a
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* nicer one :-)
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* FIXME: request binary mode - need to pass no_armor mode
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* down to the import function. Marc told that there is such a
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* binary mode ... how?
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*/
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if ( !strncmp (opt.keyserver_name, "x-broken-hkp://", 15) ) {
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sprintf( request, "x-hkp://%s/pks/lookup?op=get&search=0x%08lX",
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opt.keyserver_name+15, (ulong)keyid[1] );
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hflags |= HTTP_FLAG_NO_SHUTDOWN;
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}
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else if ( !strncmp (opt.keyserver_name, "x-hkp://", 8) ) {
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sprintf( request, "%s/pks/lookup?op=get&search=0x%08lX",
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opt.keyserver_name, (ulong)keyid[1] );
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}
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else {
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sprintf( request, "x-hkp://%s:11371/pks/lookup?op=get&search=0x%08lX",
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opt.keyserver_name, (ulong)keyid[1] );
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}
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rc = http_open_document( &hd, request, hflags );
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if( rc ) {
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log_info(_("can't get key from keyserver: %s\n"),
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rc == G10ERR_NETWORK? strerror(errno)
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: g10_errstr(rc) );
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}
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else {
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rc = import_keys_stream( hd.fp_read , 0, stats_handle );
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http_close( &hd );
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}
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m_free( request );
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return rc;
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}
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int
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hkp_import( STRLIST users )
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{
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void *stats_handle;
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if( !opt.keyserver_name ) {
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log_error(_("no keyserver known (use option --keyserver)\n"));
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return -1;
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}
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stats_handle = import_new_stats_handle ();
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for( ; users; users = users->next ) {
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KEYDB_SEARCH_DESC desc;
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classify_user_id (users->d, &desc);
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if( desc.mode != KEYDB_SEARCH_MODE_SHORT_KID
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&& desc.mode != KEYDB_SEARCH_MODE_LONG_KID ) {
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log_error (_("%s: not a valid key ID\n"), users->d );
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continue;
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}
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/* because the function may use log_info in some situations, the
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* errorcounter ist not increaed and the program will return
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* with success - which is not good when this function is used.
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*/
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if( hkp_ask_import( desc.u.kid, stats_handle ) )
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log_inc_errorcount();
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}
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import_print_stats (stats_handle);
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import_release_stats_handle (stats_handle);
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return 0;
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}
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int
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hkp_export( STRLIST users )
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{
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int rc;
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armor_filter_context_t afx;
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IOBUF temp = iobuf_temp();
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struct http_context hd;
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char *request;
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unsigned int status;
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unsigned int hflags = opt.honor_http_proxy? HTTP_FLAG_TRY_PROXY : 0;
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if( !opt.keyserver_name ) {
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log_error(_("no keyserver known (use option --keyserver)\n"));
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return -1;
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}
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iobuf_push_filter( temp, urlencode_filter, NULL );
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memset( &afx, 0, sizeof afx);
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afx.what = 1;
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iobuf_push_filter( temp, armor_filter, &afx );
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rc = export_pubkeys_stream( temp, users, 1 );
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if( rc == -1 ) {
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iobuf_close(temp);
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return 0;
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}
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iobuf_flush_temp( temp );
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request = m_alloc( strlen( opt.keyserver_name ) + 100 );
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if ( !strncmp (opt.keyserver_name, "x-broken-hkp://", 15) ) {
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sprintf( request, "x-hkp://%s/pks/add", opt.keyserver_name+15 );
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hflags |= HTTP_FLAG_NO_SHUTDOWN;
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}
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else if ( !strncmp (opt.keyserver_name, "x-hkp://", 8) ) {
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sprintf( request, "%s/pks/add", opt.keyserver_name );
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}
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else {
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sprintf( request, "x-hkp://%s:11371/pks/add", opt.keyserver_name );
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}
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rc = http_open( &hd, HTTP_REQ_POST, request , hflags );
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if( rc ) {
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log_error(_("can't connect to `%s': %s\n"),
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opt.keyserver_name,
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rc == G10ERR_NETWORK? strerror(errno)
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: g10_errstr(rc) );
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iobuf_close(temp);
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m_free( request );
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return rc;
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}
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sprintf( request, "Content-Length: %u\n",
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(unsigned)iobuf_get_temp_length(temp) + 9 );
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iobuf_writestr( hd.fp_write, request );
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m_free( request );
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http_start_data( &hd );
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iobuf_writestr( hd.fp_write, "keytext=" );
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iobuf_write( hd.fp_write, iobuf_get_temp_buffer(temp),
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iobuf_get_temp_length(temp) );
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iobuf_put( hd.fp_write, '\n' );
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iobuf_flush_temp( temp );
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iobuf_close(temp);
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rc = http_wait_response( &hd, &status );
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if( rc ) {
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log_error(_("error sending to `%s': %s\n"),
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opt.keyserver_name, g10_errstr(rc) );
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}
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else {
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#if 1
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if( opt.verbose ) {
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int c;
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while( (c=iobuf_get(hd.fp_read)) != EOF )
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putchar( c );
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}
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#endif
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if( (status/100) == 2 )
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log_info(_("success sending to `%s' (status=%u)\n"),
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opt.keyserver_name, status );
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else
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log_error(_("failed sending to `%s': status=%u\n"),
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opt.keyserver_name, status );
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}
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http_close( &hd );
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return rc;
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}
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static int
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urlencode_filter( void *opaque, int control,
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IOBUF a, byte *buf, size_t *ret_len)
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{
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size_t size = *ret_len;
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int rc=0;
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if( control == IOBUFCTRL_FLUSH ) {
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const byte *p;
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for(p=buf; size; p++, size-- ) {
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if( isalnum(*p) || *p == '-' )
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iobuf_put( a, *p );
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else if( *p == ' ' )
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iobuf_put( a, '+' );
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else {
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char numbuf[5];
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sprintf(numbuf, "%%%02X", *p );
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iobuf_writestr(a, numbuf );
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}
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}
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}
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else if( control == IOBUFCTRL_DESC )
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*(char**)buf = "urlencode_filter";
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return rc;
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}
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int
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hkp_refresh_keys (void)
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{
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KEYDB_HANDLE hd;
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KBNODE node, keyblock = NULL;
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PKT_public_key *pk;
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u32 keyid[2];
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u32 *keys = NULL;
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size_t n, nkeys=0, maxkeys=0;
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void *stats_handle;
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int rc = 0;
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/* fist take a snapshot of all keys */
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hd = keydb_new(0);
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rc = keydb_search_first(hd);
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if (rc) {
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if (rc != -1)
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log_error ("keydb_search_first failed: %s\n", g10_errstr(rc));
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goto leave;
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}
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do {
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if (!keys) {
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maxkeys = 10000;
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keys = m_alloc (maxkeys * sizeof *keys);
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nkeys = 0;
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}
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else if ( nkeys == maxkeys ) {
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maxkeys += 10000;
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keys = m_realloc (keys, maxkeys * sizeof *keys);
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}
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rc = keydb_get_keyblock (hd, &keyblock);
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if (rc) {
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log_error ("keydb_get_keyblock failed: %s\n", g10_errstr(rc));
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goto leave;
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}
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node = keyblock;
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if ( node->pkt->pkttype != PKT_PUBLIC_KEY) {
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log_debug ("invalid pkttype %d encountered\n",
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node->pkt->pkttype);
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dump_kbnode (node);
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release_kbnode(keyblock);
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continue;
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}
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pk = node->pkt->pkt.public_key;
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keyid_from_pk(pk, keyid);
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release_kbnode(keyblock);
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keyblock = NULL;
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/* fixme: replace the linear search */
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for (n=0; n < nkeys; n++) {
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if (keys[n] == keyid[1]) {
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log_info (_("duplicate (short) key ID %08lX\n"),
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(ulong)keyid[1]);
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break;
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}
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}
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if (n == nkeys) /* not a duplicate */
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keys[nkeys++] = keyid[1];
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} while ( !(rc = keydb_search_next(hd)) );
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if (rc == -1)
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rc = 0;
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if (rc)
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log_error ("keydb_search_next failed: %s\n", g10_errstr(rc));
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keydb_release(hd);
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hd = NULL;
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/* and now refresh them */
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stats_handle = import_new_stats_handle ();
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log_info (_("%lu key(s) to refresh\n"), (ulong)nkeys);
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for (n=0; n < nkeys; n++) {
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/* Note: We do only use the short keyID */
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keyid[0] = 0;
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keyid[1] = keys[n];
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if ( hkp_ask_import(keyid, stats_handle) )
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log_inc_errorcount();
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}
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import_print_stats (stats_handle);
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import_release_stats_handle (stats_handle);
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leave:
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m_free (keys);
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if (keyblock)
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release_kbnode(keyblock);
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keydb_release(hd);
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return rc;
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}
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