Ejemplo n.º 1
0
// Get Encrypted Public Key from database.
func GetPubkey(log chan string, addrHash objects.Hash) *objects.EncryptedPubkey {
	mutex.Lock()
	defer mutex.Unlock()

	hash := addrHash.GetBytes()

	if hashList == nil || dbConn == nil {
		return nil
	}
	if hashList[string(hash)] != PUBKEY {
		return nil
	}

	for s, err := dbConn.Query("SELECT payload FROM pubkey WHERE hash=?", hash); err == nil; err = s.Next() {
		var payload []byte
		s.Scan(&payload) // Assigns 1st column to rowid, the rest to row
		pub := new(objects.EncryptedPubkey)
		pub.AddrHash = addrHash
		copy(pub.IV[:], payload[:16])
		pub.Payload = payload[16:]
		return pub
	}
	// Not Found
	return nil
}
Ejemplo n.º 2
0
func checkPubkey(config *api.ApiConfig, addrHash objects.Hash) []byte {

	// First check local DB
	detail, err := localdb.GetAddressDetail(addrHash)
	if err != nil {
		// If not in database, won't be able to decrypt anyway!
		return nil
	}
	if len(detail.Pubkey) > 0 {
		if db.Contains(addrHash) != db.PUBKEY {
			enc := new(objects.EncryptedPubkey)

			enc.IV, enc.Payload, _ = encryption.SymmetricEncrypt(detail.Address, string(detail.Pubkey))
			enc.AddrHash = objects.MakeHash(detail.Address)

			config.RecvQueue <- *objects.MakeFrame(objects.PUBKEY, objects.BROADCAST, enc)
		}
		return detail.Pubkey
	}

	// If not there, check local database
	if db.Contains(addrHash) == db.PUBKEY {
		enc := db.GetPubkey(config.Log, addrHash)

		pubkey := encryption.SymmetricDecrypt(enc.IV, detail.Address, enc.Payload)
		pubkey = pubkey[:65]

		// Check public Key
		x, y := encryption.UnmarshalPubkey(pubkey)
		if x == nil {
			config.Log <- "Decrypted Public Key Invalid"
			return nil
		}

		address2 := encryption.GetAddress(config.Log, x, y)
		if string(detail.Address) != string(address2) {
			config.Log <- "Decrypted Public Key doesn't match provided address!"
			return nil
		}

		detail.Pubkey = pubkey
		err := localdb.AddUpdateAddress(detail)
		if err != nil {
			config.Log <- "Error adding pubkey to local database!"
			return nil
		}

		return pubkey
	}

	// If not there, send a pubkey request
	config.RecvQueue <- *objects.MakeFrame(objects.PUBKEY_REQUEST, objects.BROADCAST, &addrHash)
	return nil
}
Ejemplo n.º 3
0
func (service *EMPService) CreateAddress(r *http.Request, args *NilParam, reply *objects.AddressDetail) error {
	if !basicAuth(service.Config, r) {
		service.Config.Log <- fmt.Sprintf("Unauthorized RPC Request from: %s", r.RemoteAddr)
		return errors.New("Unauthorized")
	}

	// Create Address

	priv, x, y := encryption.CreateKey(service.Config.Log)
	reply.Privkey = priv
	if x == nil {
		return errors.New("Key Pair Generation Error")
	}

	reply.Pubkey = encryption.MarshalPubkey(x, y)

	reply.IsRegistered = true

	reply.Address = encryption.GetAddress(service.Config.Log, x, y)

	if reply.Address == nil {
		return errors.New("Could not create address, function returned nil.")
	}

	reply.String = encryption.AddressToString(reply.Address)

	// Add Address to Database
	err := localdb.AddUpdateAddress(reply)
	if err != nil {
		service.Config.Log <- fmt.Sprintf("Error Adding Address: ", err)
		return err
	}

	// Send Pubkey to Network
	encPub := new(objects.EncryptedPubkey)

	encPub.AddrHash = objects.MakeHash(reply.Address)

	encPub.IV, encPub.Payload, err = encryption.SymmetricEncrypt(reply.Address, string(reply.Pubkey))
	if err != nil {
		service.Config.Log <- fmt.Sprintf("Error Encrypting Pubkey: ", err)
		return nil
	}

	// Record Pubkey for Network
	service.Config.RecvQueue <- *objects.MakeFrame(objects.PUBKEY, objects.BROADCAST, encPub)
	return nil
}
Ejemplo n.º 4
0
Archivo: api.go Proyecto: dcposch/emp
// Starts a new TCP Server wth configuration specified in ApiConfig.
// Server will terminate cleanly only when data is sent to the Quit channel.
//
// See (struct ApiConfig) for details.
func Start(config *ApiConfig) {
	var err error
	var frame quibit.Frame

	defer quit(config)

	config.Log <- "Starting api..."

	// Start Database Services
	err = db.Initialize(config.Log, config.DbFile)
	defer db.Cleanup()
	if err != nil {
		config.Log <- fmt.Sprintf("Error initializing database: %s", err)
		config.Log <- "Quit"
		return
	}
	config.LocalVersion.Timestamp = time.Now().Round(time.Second)

	locVersion := objects.MakeFrame(objects.VERSION, objects.REQUEST, &config.LocalVersion)
	for str, _ := range config.NodeList.Nodes {
		locVersion.Peer = str
		config.SendQueue <- *locVersion
	}

	// Set Up Clocks
	second := time.Tick(2 * time.Second)
	minute := time.Tick(time.Minute)

	for {
		select {
		case frame = <-config.RecvQueue:
			config.Log <- fmt.Sprintf("Received %s frame...", CmdString(frame.Header.Command))
			switch frame.Header.Command {
			case objects.VERSION:
				version := new(objects.Version)
				err = version.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing version: %s", err)
				} else {
					fVERSION(config, frame, version)
				}
			case objects.PEER:
				nodeList := new(objects.NodeList)
				err = nodeList.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing peer list: %s", err)
				} else {
					fPEER(config, frame, nodeList)
				}
			case objects.OBJ:
				obj := new(objects.Obj)
				err = obj.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing obj list: %s", err)
				} else {
					fOBJ(config, frame, obj)
				}
			case objects.GETOBJ:
				getObj := new(objects.Hash)
				if len(frame.Payload) == 0 {
					break
				}
				err = getObj.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing getobj hash: %s", err)
				} else {
					fGETOBJ(config, frame, getObj)
				}
			case objects.PUBKEY_REQUEST:
				pubReq := new(objects.Hash)
				err = pubReq.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing pubkey request hash: %s", err)
				} else {
					fPUBKEY_REQUEST(config, frame, pubReq)
				}
			case objects.PUBKEY:
				pub := new(objects.EncryptedPubkey)
				err = pub.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing pubkey: %s", err)
				} else {
					fPUBKEY(config, frame, pub)
				}
			case objects.MSG:
				msg := new(objects.Message)
				err = msg.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing message: %s", err)
				} else {
					fMSG(config, frame, msg)
				}
			case objects.PUB:
				msg := new(objects.Message)
				err = msg.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing publication: %s", err)
				} else {
					fPUB(config, frame, msg)
				}
			case objects.PURGE:
				purge := new(objects.Purge)
				err = purge.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing purge: %s", err)
				} else {
					fPURGE(config, frame, purge)
				}
			case objects.CHECKTXID:
				chkTxid := new(objects.Hash)
				if len(frame.Payload) == 0 {
					break
				}
				err = chkTxid.FromBytes(frame.Payload)
				if err != nil {
					config.Log <- fmt.Sprintf("Error parsing checktxid hash: %s", err)
				} else {
					fCHECKTXID(config, frame, chkTxid)
				}
			default:
				config.Log <- fmt.Sprintf("Received invalid frame for command: %d", frame.Header.Command)
			}
		case <-config.Quit:
			fmt.Println()
			// Dump Nodes to File
			DumpNodes(config)
			return
		case <-second:
			// Reconnection Logic
			for key, node := range config.NodeList.Nodes {
				peer := quibit.GetPeer(key)
				if peer == nil || !peer.IsConnected() {
					quibit.KillPeer(key)
					if node.Attempts >= 3 {
						config.Log <- fmt.Sprintf("Max connection attempts reached for %s, disconnecting...", key)
						// Max Attempts Reached, disconnect
						delete(config.NodeList.Nodes, key)
					} else {
						config.Log <- fmt.Sprintf("Disconnected from peer %s, trying to reconnect...", key)
						peer = new(quibit.Peer)
						peer.IP = node.IP
						peer.Port = node.Port
						config.PeerQueue <- *peer
						runtime.Gosched()
						peer = nil
						node.Attempts++
						config.NodeList.Nodes[key] = node
						locVersion.Peer = key
						config.SendQueue <- *locVersion
					}
				}
			}

			if len(config.NodeList.Nodes) < 1 {
				config.Log <- "All connections lost, re-bootstrapping..."

				for i, str := range config.Bootstrap {
					if i >= bufLen {
						break
					}

					p := new(quibit.Peer)
					n := new(objects.Node)
					err := n.FromString(str)
					if err != nil {
						fmt.Println("Error Decoding Peer ", str, ": ", err)
						continue
					}

					p.IP = n.IP
					p.Port = n.Port
					config.PeerQueue <- *p
					runtime.Gosched()
					config.NodeList.Nodes[n.String()] = *n
				}

				for str, _ := range config.NodeList.Nodes {
					locVersion.Peer = str
					config.SendQueue <- *locVersion
				}
			}
		case <-minute:
			// Dump old messages
			err = db.SweepMessages(30 * 24 * time.Hour)
			if err != nil {
				config.Log <- fmt.Sprintf("Error Sweeping Messages: %s", err)
			}
		}
	}

	// Should NEVER get here!
	panic("Must've been a cosmic ray!")
}