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/* -*- Mode: C; c-file-style: "bsd" -*-
* keyserver.c - Keyserver support
* Copyright (C) 2002 Timo Schulz
*
* This file is part of OpenCDK.
*
* OpenCDK 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.
*
* OpenCDK 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 OpenCDK; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETDB_H
# include <sys/socket.h>
# include <netinet/in.h>
# include <arpa/inet.h>
# include <netdb.h>
# define closesocket close
#else
# include <windows.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "opencdk.h"
#include "main.h"
static int initialized = 0;
static void
init_sockets( void )
{
#ifdef __MINGW32__
WSADATA wsdata;
if( initialized )
return;
if( WSAStartup( 0x0101, &wsdata ) )
_cdk_log_debug( "winsock init failed.\n" );
#endif
initialized = 1;
}
static int
keyserver_hkp( const char * host, int port, u32 keyid, cdk_kbnode_t * ret_key )
{
const char * fmt;
struct hostent * hp;
struct sockaddr_in saddr;
cdk_stream_t a;
char * buf, buffer[256];
int nwritten, nread, state = 0;
int rc = 0, fd;
_cdk_log_debug( "connect to `%s'\n", host );
hp = gethostbyname( host );
if( !hp )
return CDK_General_Error;
memset( &saddr, 0, sizeof saddr );
memcpy( &saddr.sin_addr, hp->h_addr, hp->h_length );
saddr.sin_family = hp->h_addrtype;
saddr.sin_port = htons( port );
fd = socket( AF_INET, SOCK_STREAM, 0 );
if( fd == -1 )
return CDK_General_Error;
setsockopt( fd, SOL_SOCKET, SO_REUSEADDR,( char *)1, 1 );
if( connect( fd,( struct sockaddr *) &saddr, sizeof saddr ) == -1 ) {
closesocket( fd );
return CDK_General_Error;
}
fmt = "GET /pks/lookup?op=get&search=0x%08lX HTTP/1.0\r\n"
"Host: %s:%d\r\n"
"\r\n";
buf = cdk_calloc( 1, 64 + strlen( host ) + strlen( fmt ) );
if( !buf ) {
closesocket( fd );
return CDK_Out_Of_Core;
}
sprintf( buf, fmt, keyid, host, port );
_cdk_log_debug( "%s\n", buf );
nwritten = send( fd, buf, strlen( buf ), 0 );
if( nwritten == -1 ) {
cdk_free( buf );
closesocket( fd );
return CDK_File_Error;
}
a = cdk_stream_tmp( );
if( !a ) {
cdk_free( buf );
closesocket( fd );
return CDK_Out_Of_Core;
}
while( (nread = recv( fd, buffer, 255, 0 )) > 0 ) {
buffer[nread] = '\0';
/*_cdk_log_debug( "%s", buffer );*/
cdk_stream_write( a, buffer, nread );
if( strstr( buffer, "<pre>") || strstr( buffer, "</pre>" ) )
state++;
}
cdk_free( buf );
if( state != 2 )
rc = CDK_Error_No_Key;
if( !rc ) {
cdk_stream_tmp_set_mode( a, 0 );
cdk_stream_set_armor_flag( a, 0 );
cdk_stream_seek( a, 0 );
cdk_stream_read( a, NULL, 0 );
rc = cdk_keydb_get_keyblock( a, ret_key );
}
if( rc == CDK_EOF && *ret_key )
rc = 0;
cdk_stream_close( a );
closesocket( fd );
return rc;
}
/**
* cdk_keyserver_recv_key:
* @host: URL or hostname of the keyserver
* @port: The port to use for the connection
* @keyid: KeyID of the key to retrieve
* @kid_type: KeyID type (long, short, fingerprint)
* @r_knode: The key that was found wrapped in a KBNODE struct
*
* Receive a key from a keyserver.
**/
cdk_error_t
cdk_keyserver_recv_key( const char * host, int port,
const byte * keyid, int kid_type,
cdk_kbnode_t * ret_key )
{
u32 kid = 0;
if( !host || !keyid || !ret_key )
return CDK_Inv_Value;
if( !initialized )
init_sockets( );
if( !port )
port = 11371;
if( !strncmp( host, "http://", 7 ) )
host += 7;
else if( !strncmp( host, "hkp://", 6 ) )
host += 6;
else if( !strncmp( host, "x-hkp://", 8 ) )
host += 8;
switch( kid_type ) {
case CDK_DBSEARCH_SHORT_KEYID: kid = _cdk_buftou32( keyid ); break;
case CDK_DBSEARCH_KEYID : kid = _cdk_buftou32( keyid + 4 ); break;
case CDK_DBSEARCH_FPR : kid = _cdk_buftou32( keyid + 16 ); break;
default : return CDK_Inv_Mode;
}
return keyserver_hkp( host, port, kid, ret_key );
}
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