This simplifies even further the usage of the NaCl crypto primitives, by taking care of the nonce part. It uses a KDF, specifically HKDF to compute the nonces.

The encryption and decryption phases are the following:

Message -> Encrypt -> EncryptedMessage -> ToBytes() -> < = NETWORK = >  <- FromBytes() -> EncryptedMessage -> Decrypt -> Message

1- Import the library

import github.com/sec51/cryptoengine

2- Instanciate the CryptoEngine object via:

	engine, err := cryptoengine.InitCryptoEngine("Sec51")
	if err != nil {
		return err
	}

See the godoc for more info about the InitCryptoEngine parameter

3- Encrypt a message using symmetric encryption

    message := "the quick brown fox jumps over the lazy dog"
	engine.NewMessage(message)
	if err != nil {
		return err
	}

4- Serialize the message to a byte slice, so that it can be safely sent to the network

	messageBytes, err := tcp.ToBytes()
	if err != nil {
		t.Fatal(err)
	}	

5- Parse the byte slice back to a message

	message, err := MessageFromBytes(messageBytes)
	if err != nil {
		t.Fatal(err)
	}

Copyright (c) 2015 Sec51.com info@sec51.com

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