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CryptoEngine package

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.

Big Picture

The encryption and decryption phases are the following:

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

Usage

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)
	}

License

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

Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.