RetroShare/libretroshare/src/gxstunnel/rsgxstunnelitems.cc

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/*
* libretroshare/src/serialiser: rsbaseitems.cc
*
* RetroShare Serialiser.
*
* Copyright 2007-2008 by Robert Fernie.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License Version 2 as published by the Free Software Foundation.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Please report all bugs and problems to "retroshare@lunamutt.com".
*
*/
#include <stdexcept>
#include <time.h>
#include "serialiser/rsbaseserial.h"
#include "serialiser/rstlvbase.h"
#include "util/rsprint.h"
#include "gxstunnel/rsgxstunnelitems.h"
//#define GXS_TUNNEL_ITEM_DEBUG 1
std::ostream& RsGxsTunnelDHPublicKeyItem::print(std::ostream &out, uint16_t indent)
{
printRsItemBase(out, "RsGxsTunnelDHPublicKeyItem", indent);
uint16_t int_Indent = indent + 2;
printIndent(out, int_Indent);
out << " Signature Key ID: " << signature.keyId << std::endl ;
out << " Public Key ID: " << gxs_key.keyId << std::endl ;
printRsItemEnd(out, "RsGxsTunnelMsgItem", indent);
return out;
}
std::ostream& RsGxsTunnelDataItem::print(std::ostream &out, uint16_t indent)
{
printRsItemBase(out, "RsGxsTunnelDataItem", indent);
uint16_t int_Indent = indent + 2;
printIndent(out, int_Indent);
out << " message id : " << std::hex << unique_item_counter << std::dec << std::endl ;
out << " service id : " << std::hex << service_id << std::dec << std::endl ;
out << " flags : " << std::hex << flags << std::dec << std::endl ;
out << " size : " << data_size << std::endl ;
out << " data : " << RsUtil::BinToHex(data,std::min(50u,data_size)) << ((data_size>50u)?"...":"") << std::endl ;
printRsItemEnd(out, "RsGxsTunnelDataItem", indent);
return out;
}
std::ostream& RsGxsTunnelDataAckItem::print(std::ostream &out, uint16_t indent)
{
printRsItemBase(out, "RsGxsTunnelDataItem", indent);
uint16_t int_Indent = indent + 2;
printIndent(out, int_Indent);
out << " message id : " << std::hex << unique_item_counter << std::dec << std::endl ;
printRsItemEnd(out, "RsGxsTunnelDataAckItem", indent);
return out;
}
std::ostream& RsGxsTunnelStatusItem::print(std::ostream &out, uint16_t indent)
{
printRsItemBase(out, "RsGxsTunnelDataItem", indent);
uint16_t int_Indent = indent + 2;
printIndent(out, int_Indent);
out << " flags : " << std::hex << status << std::dec << std::endl ;
printRsItemEnd(out, "RsGxsTunnelStatusItem", indent);
return out;
}
/*************************************************************************/
2015-11-26 20:40:06 -05:00
RsGxsTunnelDHPublicKeyItem::~RsGxsTunnelDHPublicKeyItem()
{
BN_free(public_key) ;
}
/*************************************************************************/
RsItem *RsGxsTunnelSerialiser::deserialise(void *data, uint32_t *pktsize)
{
uint32_t rstype = getRsItemId(data);
uint32_t rssize = getRsItemSize(data);
#ifdef GXS_TUNNEL_ITEM_DEBUG
std::cerr << "deserializing packet..."<< std::endl ;
#endif
// look what we have...
if (*pktsize < rssize) /* check size */
{
std::cerr << "GxsTunnel deserialisation: not enough size: pktsize=" << *pktsize << ", rssize=" << rssize << std::endl ;
return NULL; /* not enough data */
}
/* set the packet length */
*pktsize = rssize;
/* ready to load */
if ((RS_PKT_VERSION_SERVICE != getRsItemVersion(rstype)) || (RS_SERVICE_TYPE_GXS_TUNNEL != getRsItemService(rstype)))
{
#ifdef GXS_TUNNEL_ITEM_DEBUG
std::cerr << "GxsTunnel deserialisation: wrong type !" << std::endl ;
#endif
return NULL; /* wrong type */
}
switch(getRsItemSubType(rstype))
{
case RS_PKT_SUBTYPE_GXS_TUNNEL_DH_PUBLIC_KEY: return deserialise_RsGxsTunnelDHPublicKeyItem(data,*pktsize) ;
case RS_PKT_SUBTYPE_GXS_TUNNEL_DATA: return deserialise_RsGxsTunnelDataItem (data,*pktsize) ;
case RS_PKT_SUBTYPE_GXS_TUNNEL_DATA_ACK: return deserialise_RsGxsTunnelDataAckItem (data,*pktsize) ;
case RS_PKT_SUBTYPE_GXS_TUNNEL_STATUS: return deserialise_RsGxsTunnelStatusItem (data,*pktsize) ;
default:
std::cerr << "Unknown packet type in chat!" << std::endl ;
return NULL ;
}
}
/*************************************************************************/
uint32_t RsGxsTunnelDHPublicKeyItem::serial_size()
{
uint32_t s = 8 ; // header
s += 4 ; // BN size
s += BN_num_bytes(public_key) ; // public_key
s += signature.TlvSize() ; // signature
s += gxs_key.TlvSize() ; // gxs_key
return s ;
}
uint32_t RsGxsTunnelDataItem::serial_size()
{
uint32_t s = 8 ; // header
s += 8 ; // counter
s += 4 ; // flags
s += 4 ; // service id
s += 4 ; // data_size
s += data_size; // data
return s ;
}
uint32_t RsGxsTunnelDataAckItem::serial_size()
{
uint32_t s = 8 ; // header
s += 8 ; // counter
return s ;
}
uint32_t RsGxsTunnelStatusItem::serial_size()
{
uint32_t s = 8 ; // header
s += 4 ; // flags
return s ;
}
/*************************************************************************/
bool RsGxsTunnelDHPublicKeyItem::serialise(void *data,uint32_t& pktsize)
{
uint32_t tlvsize = serial_size() ;
uint32_t offset = 0;
if (pktsize < tlvsize)
return false; /* not enough space */
pktsize = tlvsize;
bool ok = true;
ok &= setRsItemHeader(data, tlvsize, PacketId(), tlvsize);
/* skip the header */
offset += 8;
uint32_t s = BN_num_bytes(public_key) ;
ok &= setRawUInt32(data, tlvsize, &offset, s);
BN_bn2bin(public_key,&((unsigned char *)data)[offset]) ;
offset += s ;
ok &= signature.SetTlv(data, tlvsize, &offset);
ok &= gxs_key.SetTlv(data, tlvsize, &offset);
if (offset != tlvsize)
{
ok = false;
std::cerr << "RsGxsTunnelDHPublicKeyItem::serialiseItem() Size Error! offset=" << offset << ", tlvsize=" << tlvsize << std::endl;
}
return ok ;
}
bool RsGxsTunnelStatusItem::serialise(void *data, uint32_t& pktsize)
{
uint32_t tlvsize = serial_size() ;
uint32_t offset = 0;
if (pktsize < tlvsize)
return false; /* not enough space */
pktsize = tlvsize;
bool ok = true;
ok &= setRsItemHeader(data, tlvsize, PacketId(), tlvsize);
#ifdef GXS_TUNNEL_ITEM_DEBUG
std::cerr << "RsGxsTunnelSerialiser serialising chat status item." << std::endl;
std::cerr << "RsGxsTunnelSerialiser::serialiseItem() Header: " << ok << std::endl;
std::cerr << "RsGxsTunnelSerialiser::serialiseItem() Size: " << tlvsize << std::endl;
#endif
/* skip the header */
offset += 8;
/* add mandatory parts first */
ok &= setRawUInt32(data, tlvsize, &offset, status);
if (offset != tlvsize)
{
ok = false;
std::cerr << "RsGxsTunnelSerialiser::serialiseItem() Size Error! " << std::endl;
}
#ifdef GXS_TUNNEL_ITEM_DEBUG
std::cerr << "computed size: " << 256*((unsigned char*)data)[6]+((unsigned char*)data)[7] << std::endl ;
#endif
return ok;
}
bool RsGxsTunnelDataItem::serialise(void *dt, uint32_t& pktsize)
{
uint32_t tlvsize = serial_size() ;
uint32_t offset = 0;
if (pktsize < tlvsize)
return false; /* not enough space */
pktsize = tlvsize;
bool ok = true;
ok &= setRsItemHeader(dt, tlvsize, PacketId(), tlvsize);
#ifdef GXS_TUNNEL_ITEM_DEBUG
std::cerr << "RsGxsTunnelSerialiser serialising chat status item." << std::endl;
std::cerr << "RsGxsTunnelSerialiser::serialiseItem() Header: " << ok << std::endl;
std::cerr << "RsGxsTunnelSerialiser::serialiseItem() Size: " << tlvsize << std::endl;
#endif
/* skip the header */
offset += 8;
/* add mandatory parts first */
ok &= setRawUInt64(dt, tlvsize, &offset, unique_item_counter);
ok &= setRawUInt32(dt, tlvsize, &offset, flags);
ok &= setRawUInt32(dt, tlvsize, &offset, service_id);
ok &= setRawUInt32(dt, tlvsize, &offset, data_size);
if(offset + data_size <= tlvsize)
{
memcpy(&((uint8_t*)dt)[offset],data,data_size) ;
offset += data_size ;
}
else
ok = false ;
if (offset != tlvsize)
{
ok = false;
std::cerr << "RsGxsTunnelSerialiser::serialiseItem() Size Error! " << std::endl;
}
return ok;
}
bool RsGxsTunnelDataAckItem::serialise(void *data, uint32_t& pktsize)
{
uint32_t tlvsize = serial_size() ;
uint32_t offset = 0;
if (pktsize < tlvsize)
return false; /* not enough space */
pktsize = tlvsize;
bool ok = true;
ok &= setRsItemHeader(data, tlvsize, PacketId(), tlvsize);
#ifdef GXS_TUNNEL_ITEM_DEBUG
std::cerr << "RsGxsTunnelSerialiser serialising chat status item." << std::endl;
std::cerr << "RsGxsTunnelSerialiser::serialiseItem() Header: " << ok << std::endl;
std::cerr << "RsGxsTunnelSerialiser::serialiseItem() Size: " << tlvsize << std::endl;
#endif
/* skip the header */
offset += 8;
/* add mandatory parts first */
ok &= setRawUInt64(data, tlvsize, &offset, unique_item_counter);
if (offset != tlvsize)
{
ok = false;
std::cerr << "RsGxsTunnelSerialiser::serialiseItem() Size Error! " << std::endl;
}
return ok;
}
/*************************************************************************/
RsGxsTunnelDHPublicKeyItem *RsGxsTunnelSerialiser::deserialise_RsGxsTunnelDHPublicKeyItem(void *data,uint32_t /*size*/)
{
uint32_t offset = 8; // skip the header
uint32_t rssize = getRsItemSize(data);
bool ok = true ;
RsGxsTunnelDHPublicKeyItem *item = new RsGxsTunnelDHPublicKeyItem() ;
uint32_t s=0 ;
/* get mandatory parts first */
ok &= getRawUInt32(data, rssize, &offset, &s);
if(s > rssize || rssize - s < offset)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Size error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
item->public_key = BN_bin2bn(&((unsigned char *)data)[offset],s,NULL) ;
offset += s ;
ok &= item->signature.GetTlv(data, rssize, &offset) ;
ok &= item->gxs_key.GetTlv(data, rssize, &offset) ;
if (offset != rssize)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Size error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
if (!ok)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Unknown error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
return item ;
}
RsGxsTunnelDataItem *RsGxsTunnelSerialiser::deserialise_RsGxsTunnelDataItem(void *dat,uint32_t size)
{
uint32_t offset = 8; // skip the header
uint32_t rssize = getRsItemSize(dat);
bool ok = true ;
RsGxsTunnelDataItem *item = new RsGxsTunnelDataItem();
/* get mandatory parts first */
ok &= getRawUInt64(dat, rssize, &offset, &item->unique_item_counter);
ok &= getRawUInt32(dat, rssize, &offset, &item->flags);
ok &= getRawUInt32(dat, rssize, &offset, &item->service_id);
ok &= getRawUInt32(dat, rssize, &offset, &item->data_size);
if(item->data_size > rssize || rssize - item->data_size < offset)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Size error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
item->data = (unsigned char*)malloc(item->data_size) ;
if(item->data == NULL)
{
delete item ;
return NULL ;
}
memcpy(item->data,&((uint8_t*)dat)[offset],item->data_size) ;
offset += item->data_size ;
if (offset != rssize)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Size error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
if (!ok)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Unknown error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
return item ;
}
RsGxsTunnelDataAckItem *RsGxsTunnelSerialiser::deserialise_RsGxsTunnelDataAckItem(void *dat,uint32_t /* size */)
{
uint32_t offset = 8; // skip the header
uint32_t rssize = getRsItemSize(dat);
bool ok = true ;
RsGxsTunnelDataAckItem *item = new RsGxsTunnelDataAckItem();
/* get mandatory parts first */
ok &= getRawUInt64(dat, rssize, &offset, &item->unique_item_counter);
if (offset != rssize)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Size error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
if (!ok)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Unknown error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
return item ;
}
RsGxsTunnelStatusItem *RsGxsTunnelSerialiser::deserialise_RsGxsTunnelStatusItem(void *dat,uint32_t size)
{
uint32_t offset = 8; // skip the header
uint32_t rssize = getRsItemSize(dat);
bool ok = true ;
RsGxsTunnelStatusItem *item = new RsGxsTunnelStatusItem();
/* get mandatory parts first */
ok &= getRawUInt32(dat, rssize, &offset, &item->status);
if (offset != rssize)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Size error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
if (!ok)
{
std::cerr << "RsGxsTunnelDHPublicKeyItem::() Unknown error while deserializing." << std::endl ;
delete item ;
return NULL ;
}
return item ;
}