コード例 #1
0
ファイル: objects.go プロジェクト: msecret/emp
// Get basic message from database.
func GetMessage(log chan string, txidHash objects.Hash) *objects.Message {
	mutex.Lock()
	defer mutex.Unlock()

	hash := txidHash.GetBytes()

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

	msg := new(objects.Message)

	for s, err := dbConn.Query("SELECT * FROM msg WHERE hash=?", hash); err == nil; err = s.Next() {
		var timestamp int64
		encrypted := make([]byte, 0, 0)
		txidhash := make([]byte, 0, 0)
		addrhash := make([]byte, 0, 0)
		s.Scan(&txidhash, &addrhash, &timestamp, &encrypted)

		msg.TxidHash.FromBytes(txidhash)
		msg.AddrHash.FromBytes(addrhash)
		msg.Timestamp = time.Unix(timestamp, 0)
		msg.Content.FromBytes(encrypted)

		return msg
	}
	// Not Found
	return nil
}
コード例 #2
0
ファイル: rpcmsg.go プロジェクト: msecret/emp
func (service *EMPService) PublishMessage(r *http.Request, args *SendMsg, reply *SendResponse) error {
	if !basicAuth(service.Config, r) {
		service.Config.Log <- fmt.Sprintf("Unauthorized RPC Request from: %s", r.RemoteAddr)
		return errors.New("Unauthorized")
	}

	// Nil Check
	if len(args.Sender) == 0 || len(args.Plaintext) == 0 {
		return errors.New("All fields required.")
	}

	var err error

	// Get Addresses
	sendAddr := encryption.StringToAddress(args.Sender)
	if len(sendAddr) == 0 {
		return errors.New("Invalid sender address!")
	}

	sender, err := localdb.GetAddressDetail(objects.MakeHash(sendAddr))
	if err != nil {
		return errors.New(fmt.Sprintf("Error pulling send address from Database: %s", err))
	}
	if sender.Privkey == nil {
		return errors.New("Private Key Required to Publish Message")
	}

	// Create New Message
	msg := new(objects.FullMessage)
	msg.Decrypted = new(objects.DecryptedMessage)
	msg.Encrypted = nil

	txid := make([]byte, len(msg.Decrypted.Txid), cap(msg.Decrypted.Txid))

	// Fill out decrypted message
	n, err := rand.Read(txid)
	if n < len(msg.Decrypted.Txid[:]) || err != nil {
		return errors.New(fmt.Sprintf("Problem with random reader: %s", err))
	}
	copy(msg.Decrypted.Pubkey[:], sender.Pubkey)
	msg.Decrypted.Subject = args.Subject
	msg.Decrypted.MimeType = "text/plain"
	msg.Decrypted.Content = args.Plaintext
	msg.Decrypted.Length = uint32(len(msg.Decrypted.Content))

	// Fill Out Meta Message (save timestamp)
	msg.MetaMessage.Purged = false
	msg.MetaMessage.TxidHash = objects.MakeHash(txid)
	msg.MetaMessage.Sender = sender.String
	msg.MetaMessage.Recipient = "<Subscription Message>"

	// Get Signature
	priv := new(ecdsa.PrivateKey)
	priv.PublicKey.Curve = encryption.GetCurve()
	priv.D = new(big.Int)
	priv.D.SetBytes(sender.Privkey)

	sign := msg.Decrypted.GetBytes()
	sign = sign[:len(sign)-65]
	signHash := objects.MakeHash(sign)

	x, y, err := ecdsa.Sign(rand.Reader, priv, signHash.GetBytes())
	if err != nil {
		return err
	}

	copy(msg.Decrypted.Signature[:], encryption.MarshalPubkey(x, y))

	// Send message and add to sendbox...
	msg.Encrypted = encryption.EncryptPub(service.Config.Log, sender.Privkey, string(msg.Decrypted.GetBytes()))
	msg.MetaMessage.Timestamp = time.Now().Round(time.Second)

	// Now Add Txid
	copy(msg.Decrypted.Txid[:], txid)

	err = localdb.AddUpdateMessage(msg, localdb.SENDBOX)
	if err != nil {
		return err
	}

	sendMsg := new(objects.Message)
	sendMsg.TxidHash = msg.MetaMessage.TxidHash
	sendMsg.AddrHash = objects.MakeHash(sender.Address)
	sendMsg.Timestamp = msg.MetaMessage.Timestamp
	sendMsg.Content = *msg.Encrypted

	service.Config.RecvQueue <- *objects.MakeFrame(objects.PUB, objects.BROADCAST, sendMsg)

	reply.IsSent = true

	// Finish by setting msg's txid
	reply.TxidHash = msg.MetaMessage.TxidHash.GetBytes()
	return nil

}