private static void AeadExample()
{
// Plaintext to encrypt.
var plaintext = "I'm cooking MC's like a pound of bacon";
// Create a 32-byte key.
var key = Aead.GenerateKey256();
// Create a 16-byte nonce (optional).
var nonce = Aead.GenerateNonce(16);
// Create a new AEAD instance using the AES-CMAC-SIV
// algorithm. It implements the IDisposable interface,
// so it's best to create it inside using statement.
using (var aead = Aead.CreateAesCmacSiv(key))
{
// If the message is string, convert it to byte array first.
var bytes = Encoding.UTF8.GetBytes(plaintext);
// Encrypt the message.
var ciphertext = aead.Seal(bytes, nonce);
// To decrypt the message, call the Open method with the
// ciphertext and the same nonce that you generated previously.
bytes = aead.Open(ciphertext, nonce);
// If the message was originally string,
// convert if from byte array to string.
plaintext = Encoding.UTF8.GetString(bytes);
// Print the decrypted message to the standard output.
Console.WriteLine(plaintext);
}
}
private static void StreamExample()
{
// Messages to encrypt.
var messages = new List <string> {
"Now that the party is jumping",
"With the bass kicked in, the fingers are pumpin'",
"Quick to the point, to the point no faking",
"I'm cooking MC's like a pound of bacon"
};
// Create a 32-byte key.
var key = Aead.GenerateKey256();
// Create a 8-byte STREAM nonce (required).
var nonce = StreamEncryptor.GenerateNonce();
// Create STREAM encryptor and decryptor using the AES-CMAC-SIV
// algorithm. They implement the IDisposable interface,
// so it's best to create them inside using statement.
using (var encryptor = StreamEncryptor.CreateAesCmacSivEncryptor(key, nonce))
using (var decryptor = StreamDecryptor.CreateAesCmacSivDecryptor(key, nonce))
{
for (int i = 0; i < messages.Count; ++i)
{
// Calculate whether the message is the last message to encrypt.
bool last = i == messages.Count - 1;
// Convert the message to byte array first.
var bytes = Encoding.UTF8.GetBytes(messages[i]);
// Encrypt the message.
var ciphertext = encryptor.Seal(bytes, null, last);
// Decrypt the message.
var message = decryptor.Open(ciphertext, null, last);
// Convert the message back to string.
var plaintext = Encoding.UTF8.GetString(bytes);
// Print the decrypted message to the standard output.
Console.WriteLine(plaintext);
}
}
}