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/* hkp.c - Horrowitz Keyserver Protocol
* Copyright (C) 1999 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <assert.h>
#include "errors.h"
#include "util.h"
#include "ttyio.h"
#include "i18n.h"
#include <gcrypt.h>
#include "options.h"
#include "filter.h"
#include "http.h"
#include "main.h"
static int urlencode_filter( void *opaque, int control,
IOBUF a, byte *buf, size_t *ret_len);
/****************
* Try to import the key with KEYID from a keyserver but ask the user
* before doing so.
* Returns: 0 the key was successfully imported
* -1 key not found on server or user does not want to
* import the key
* or other error codes.
*/
int
hkp_ask_import( u32 *keyid )
{
#ifdef HAVE_DOSISH_SYSTEM
return -1;
#else
struct http_context hd;
char *request;
int rc;
if( !opt.keyserver_name )
return -1;
log_info("requesting key %08lX from %s ...\n", (ulong)keyid[1],
opt.keyserver_name );
request = gcry_xmalloc( strlen( opt.keyserver_name ) + 100 );
/* hkp does not accept the long keyid - we should really write a
* nicer one */
sprintf( request, "x-hkp://%s:11371/pks/lookup?op=get&search=0x%08lX",
opt.keyserver_name, (ulong)keyid[1] );
rc = http_open_document( &hd, request, 0 );
if( rc ) {
log_info("can't get key from keyserver: %s\n",
rc == G10ERR_NETWORK? strerror(errno)
: g10_errstr(rc) );
}
else {
rc = import_keys_stream( hd.fp_read , 0 );
http_close( &hd );
}
gcry_free( request );
return rc;
#endif
}
int
hkp_import( STRLIST users )
{
#ifdef HAVE_DOSISH_SYSTEM
return -1;
#else
if( !opt.keyserver_name ) {
log_error("no keyserver known (use option --keyserver)\n");
return -1;
}
for( ; users; users = users->next ) {
u32 kid[2];
int type = classify_user_id( users->d, kid, NULL, NULL, NULL );
if( type != 10 && type != 11 ) {
log_info("%s: not a valid key ID\n", users->d );
continue;
}
hkp_ask_import( kid );
}
return 0;
#endif
}
int
hkp_export( STRLIST users )
{
#ifdef HAVE_DOSISH_SYSTEM
return -1;
#else
int rc;
armor_filter_context_t afx;
IOBUF temp = iobuf_temp();
struct http_context hd;
char *request;
unsigned int status;
if( !opt.keyserver_name ) {
log_error("no keyserver known (use option --keyserver)\n");
return -1;
}
iobuf_push_filter( temp, urlencode_filter, NULL );
memset( &afx, 0, sizeof afx);
afx.what = 1;
iobuf_push_filter( temp, armor_filter, &afx );
rc = export_pubkeys_stream( temp, users, 1 );
if( rc == -1 ) {
iobuf_close(temp);
return 0;
}
iobuf_flush_temp( temp );
request = gcry_xmalloc( strlen( opt.keyserver_name ) + 100 );
sprintf( request, "x-hkp://%s:11371/pks/add", opt.keyserver_name );
rc = http_open( &hd, HTTP_REQ_POST, request , 0 );
if( rc ) {
log_error("can't connect to `%s': %s\n",
opt.keyserver_name,
rc == G10ERR_NETWORK? strerror(errno)
: g10_errstr(rc) );
iobuf_close(temp);
gcry_free( request );
return rc;
}
sprintf( request, "Content-Length: %u\n",
(unsigned)iobuf_get_temp_length(temp) + 9 );
iobuf_writestr( hd.fp_write, request );
gcry_free( request );
http_start_data( &hd );
iobuf_writestr( hd.fp_write, "keytext=" );
iobuf_write( hd.fp_write, iobuf_get_temp_buffer(temp),
iobuf_get_temp_length(temp) );
iobuf_put( hd.fp_write, '\n' );
iobuf_flush_temp( temp );
iobuf_close(temp);
rc = http_wait_response( &hd, &status );
if( rc ) {
log_error("error sending to `%s': %s\n",
opt.keyserver_name, g10_errstr(rc) );
}
else {
#if 1
if( opt.verbose ) {
int c;
while( (c=iobuf_get(hd.fp_read)) != EOF )
putchar( c );
}
#endif
if( (status/100) == 2 )
log_info("success sending to `%s' (status=%u)\n",
opt.keyserver_name, status );
else
log_error("failed sending to `%s': status=%u\n",
opt.keyserver_name, status );
}
http_close( &hd );
return rc;
#endif
}
static int
urlencode_filter( void *opaque, int control,
IOBUF a, byte *buf, size_t *ret_len)
{
size_t size = *ret_len;
int rc=0;
if( control == IOBUFCTRL_FLUSH ) {
const byte *p;
for(p=buf; size; p++, size-- ) {
if( isalnum(*p) || *p == '-' )
iobuf_put( a, *p );
else if( *p == ' ' )
iobuf_put( a, '+' );
else {
char numbuf[5];
sprintf(numbuf, "%%%02X", *p );
iobuf_writestr(a, numbuf );
}
}
}
else if( control == IOBUFCTRL_DESC )
*(char**)buf = "urlencode_filter";
return rc;
}
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