public void EncryptAndDecryptTest()
{
var key = SecretStream.GenerateKey();
var header = SecretStream.GenerateHeader();
var encrypter = new SecretStream(key, header, SecretStream.MODE_PUSH);
var decrypter = new SecretStream(key, header, SecretStream.MODE_PULL);
var message1 = "Hello, World!";
var message2 = "{ \"json\": \"data\" }";
var message3 = "Some more random messaging";
var ciphertext1 = encrypter.Push(message1);
encrypter.Rekey();
var ciphertext2 = encrypter.Push(message2, SecretStream.TAG_PUSH);
var ciphertext3 = encrypter.Push(message3, SecretStream.TAG_FINAL);
int tag = -1;
var d1 = decrypter.Pull(ciphertext1, out tag);
Assert.AreEqual(tag, SecretStream.TAG_MESSAGE);
decrypter.Rekey();
var d2 = decrypter.Pull(ciphertext2, out tag);
Assert.AreEqual(tag, SecretStream.TAG_PUSH);
var d3 = decrypter.Pull(ciphertext3, out tag);
Assert.AreEqual(tag, SecretStream.TAG_FINAL);
// Verify that the original string and the decrypted string are equivalent
Assert.AreEqual(Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(message1)), Convert.ToBase64String(d1));
Assert.AreEqual(Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(message2)), Convert.ToBase64String(d2));
Assert.AreEqual(Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(message3)), Convert.ToBase64String(d3));
}
public void GenerateKeyTest()
{
Assert.AreEqual(32, SecretStream.GenerateKey().Length);
}
public void GenerateHeaderTest()
{
Assert.AreEqual(24, SecretStream.GenerateHeader().Length);
}
public static void RoundTripCheck(this LogEntry entry, ILogObjectTypeProvider typeProvider, byte[] secretKey)
{
var firstMemoryStream = new MemoryStream();
var firstSerializeContext = new LogSerializeContext(new BinaryWriter(firstMemoryStream), typeProvider);
byte[] nonce;
if (secretKey != null)
{
nonce = SecretStream.Nonce();
firstSerializeContext.bw.WriteVarBuffer(nonce);
using var ems = new MemoryStream();
using var ebw = new BinaryWriter(ems);
var ec = new LogSerializeContext(ebw, typeProvider, firstSerializeContext.Version);
entry.Serialize(ec, false);
firstSerializeContext.bw.WriteVarBuffer(SecretStream.EncryptMessage(ems.ToArray(), nonce, secretKey));
}
else
{
firstSerializeContext.bw.Write(false);
entry.Serialize(firstSerializeContext, false);
}
var originalData = firstMemoryStream.ToArray();
var br = new BinaryReader(new MemoryStream(originalData));
var deserializeContext = new LogDeserializeContext(br, typeProvider);
nonce = deserializeContext.br.ReadVarBuffer();
LogEntry deserialized;
if (nonce != null)
{
using var dms =
new MemoryStream(SecretStream.DecryptMessage(deserializeContext.br.ReadVarBuffer(), nonce,
secretKey));
using var dbr = new BinaryReader(dms);
var dc = new LogDeserializeContext(dbr, typeProvider);
deserialized = new LogEntry(dc);
}
else
{
deserialized = new LogEntry(deserializeContext);
}
var secondMemoryStream = new MemoryCompareStream(originalData);
var secondSerializeContext = new LogSerializeContext(new BinaryWriter(secondMemoryStream), typeProvider);
if (secretKey != null)
{
secondSerializeContext.bw.WriteVarBuffer(nonce);
using var ems = new MemoryStream();
using var ebw = new BinaryWriter(ems);
var ec = new LogSerializeContext(ebw, typeProvider, secondSerializeContext.Version);
deserialized.Serialize(ec, false);
secondSerializeContext.bw.WriteVarBuffer(SecretStream.EncryptMessage(ems.ToArray(), nonce, secretKey));
}
else
{
secondSerializeContext.bw.Write(false);
deserialized.Serialize(secondSerializeContext, false);
}
}