// 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, ×tamp, &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
}
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
}