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debugged transport of encrypted items. Still needs work.

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This commit is contained in:
csoler 2016-02-15 23:24:18 -05:00
parent 0513e71c68
commit 763108f5fa
3 changed files with 42 additions and 7 deletions
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33
libretroshare/src/gxs/rsgxsnetservice.cc
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@ -2140,7 +2140,21 @@ void RsGxsNetService::processTransactions()
sendItem(trans);
// move to completed transactions
mComplTransactions.push_back(tr);
// try to decrypt, if needed. This function returns true if the transaction is not encrypted.
if(decryptTransaction(tr))
{
#ifdef NXS_NET_DEBUG_7
GXSNETDEBUG_P_(tr->mTransaction->PeerId()) << " successfully decrypted transaction " << transN << std::endl;
#endif
mComplTransactions.push_back(tr);
}
#ifdef NXS_NET_DEBUG_7
else
GXSNETDEBUG_P_(tr->mTransaction->PeerId()) << " no decryption occurred in transaction " << transN << std::endl;
#endif
#ifdef NXS_NET_DEBUG_1
int total_transaction_time = (int)time(NULL) - (tr->mTimeOut - mTransactionTimeOut) ;
GXSNETDEBUG_P_(mit->first) << " incoming completed " << tr->mTransaction->nItems << " items transaction in " << total_transaction_time << " seconds." << std::endl;
@ -3465,6 +3479,8 @@ bool RsGxsNetService::encryptTransaction(NxsTransaction *tr)
#endif
GxsSecurity::MultiEncryptionContext muctx ;
GxsSecurity::initEncryption(muctx,recipient_keys);
uint32_t trNumber = 0 ;
// 3 - serialise and encrypt each message, converting it into a NxsEncryptedDataItem
@ -3494,7 +3510,10 @@ bool RsGxsNetService::encryptTransaction(NxsTransaction *tr)
enc_item->aes_encrypted_data.bin_len = encrypted_len ;
enc_item->aes_encrypted_data.bin_data = encrypted_data ;
enc_item->aes_encrypted_data.tlvtype = TLV_TYPE_BIN_ENCRYPTED ;
enc_item->transactionNumber = (*it)->transactionNumber ;
enc_item->PeerId((*it)->PeerId()) ;
trNumber= (*it)->transactionNumber ;
encrypted_items.push_back(enc_item) ;
#ifdef NXS_NET_DEBUG_7
@ -3515,6 +3534,8 @@ bool RsGxsNetService::encryptTransaction(NxsTransaction *tr)
GXSNETDEBUG_P_(peerId) << " Creating session key" << std::endl;
#endif
RsNxsSessionKeyItem *session_key_item = new RsNxsSessionKeyItem(mServType) ;
session_key_item->PeerId(tr->mTransaction->PeerId()) ;
session_key_item->transactionNumber = trNumber ;
memcpy(session_key_item->iv,muctx.initialisation_vector(),EVP_MAX_IV_LENGTH) ;
@ -3556,9 +3577,9 @@ bool RsGxsNetService::decryptTransaction(NxsTransaction *tr)
if(esk == NULL)
{
#ifdef NXS_NET_DEBUG_7
GXSNETDEBUG_P_(peerId) << " (II) nothing to decrypt. No session key packet in this transaction." << std::endl;
GXSNETDEBUG_P_(peerId) << " (II) nothing to decrypt. No session key packet in this transaction. Transaction is not encrypted" << std::endl;
#endif
return false ;
return true ;
}
// 2 - Try to decrypt the session key. If not, return false. That probably means
// we don't own that identity.
@ -3578,7 +3599,7 @@ bool RsGxsNetService::decryptTransaction(NxsTransaction *tr)
if(!mGixs->getPrivateKey(private_key_id,private_key))
{
std::cerr << "(EE) Cannot find private key to decrypt incoming transaction, for ID " << it->first << ". This is a bug since the key is supposed ot be here." << std::endl;
std::cerr << " (EE) Cannot find private key to decrypt incoming transaction, for ID " << it->first << ". This is a bug since the key is supposed ot be here." << std::endl;
return false;
}
@ -3643,7 +3664,7 @@ bool RsGxsNetService::decryptTransaction(NxsTransaction *tr)
// 4 - put back in transaction.
#ifdef NXS_NET_DEBUG_7
GXSNETDEBUG_P_(peerId) << " replacing items with clear items" << std::endl;
GXSNETDEBUG_P_(peerId) << " Decryption successful: replacing items with clear items" << std::endl;
#endif
for(std::list<RsNxsItem*>::const_iterator it(tr->mItems.begin());it!=tr->mItems.end();++it)

10
libretroshare/src/serialiser/rsnxsitems.cc
View File

@ -425,6 +425,8 @@ bool RsNxsSessionKeyItem::serialise(void *data, uint32_t& size) const
if(!serialise_header(data,size,tlvsize,offset))
return false ;
ok &= setRawUInt32(data, size, &offset, transactionNumber);
if(offset + EVP_MAX_IV_LENGTH >= size)
{
std::cerr << "RsNxsSessionKeyItem::serialize(): error. Not enough room for IV !" << std::endl;
@ -460,6 +462,7 @@ bool RsNxsEncryptedDataItem::serialise(void *data, uint32_t& size) const
if(!serialise_header(data,size,tlvsize,offset))
return false ;
ok &= setRawUInt32(data, size, &offset, transactionNumber);
ok &= aes_encrypted_data.SetTlv(data, size, &offset) ;
if(offset != tlvsize)
@ -840,6 +843,8 @@ RsNxsSessionKeyItem *RsNxsSerialiser::deserialNxsSessionKeyItem(void* data,
uint32_t offset = 8 ;
RsNxsSessionKeyItem* item = new RsNxsSessionKeyItem(SERVICE_TYPE);
ok &= getRawUInt32(data, *size, &offset, &(item->transactionNumber));
if(offset + EVP_MAX_IV_LENGTH >= *size)
{
@ -891,6 +896,9 @@ RsNxsEncryptedDataItem *RsNxsSerialiser::deserialNxsEncryptedDataItem(void* da
RsNxsEncryptedDataItem* item = new RsNxsEncryptedDataItem(SERVICE_TYPE);
ok &= getRawUInt32(data, *size, &offset, &(item->transactionNumber));
item->aes_encrypted_data.tlvtype = TLV_TYPE_BIN_ENCRYPTED ;
ok &= item->aes_encrypted_data.GetTlv(data,*size,&offset) ;
if (offset != *size)
@ -1037,6 +1045,7 @@ uint32_t RsNxsEncryptedDataItem::serial_size() const
{
uint32_t s = 8; // header size
s += 4; // transaction number
s += aes_encrypted_data.TlvSize() ;
return s;
@ -1045,6 +1054,7 @@ uint32_t RsNxsSessionKeyItem::serial_size() const
{
uint32_t s = 8; // header size
s += 4; // transaction number
s += EVP_MAX_IV_LENGTH ; // iv
s += 4 ; // encrypted_session_keys.size() ;

6
libretroshare/src/serialiser/rsnxsitems.h
View File

@ -277,7 +277,11 @@ class RsNxsEncryptedDataItem : public RsNxsItem
public:
RsNxsEncryptedDataItem(uint16_t servtype) : RsNxsItem(servtype, RS_PKT_SUBTYPE_NXS_SESSION_KEY_ITEM),aes_encrypted_data(servtype) { clear(); }
RsNxsEncryptedDataItem(uint16_t servtype) : RsNxsItem(servtype, RS_PKT_SUBTYPE_NXS_ENCRYPTED_DATA_ITEM),aes_encrypted_data(servtype)
{
aes_encrypted_data.tlvtype = TLV_TYPE_BIN_ENCRYPTED ;
clear();
}
virtual ~RsNxsEncryptedDataItem() {}
virtual bool serialise(void *data,uint32_t& size) const;