private ValueTuple <byte[], byte[]> Random()
{
var range = RNGCryptoServiceProvider.GetInt32(128, Length);
byte[] r1 = new byte[range];
byte[] r2 = new byte[Length - range];
RNGCryptoServiceProvider.Fill(r1);
RNGCryptoServiceProvider.Fill(r2);
return(ValueTuple.Create(r1, r2));
}
public void CryptoLockUnlock()
{
Span <byte> mac = stackalloc byte[16];
Span <byte> emptyText = stackalloc byte[16];
Span <byte> cipherText = stackalloc byte[16];
Span <byte> inputText = stackalloc byte[16];
inputText[0] = (byte)'a';
inputText[1] = (byte)'b';
inputText[2] = (byte)'c';
inputText[3] = (byte)'d';
Span <byte> key = stackalloc byte[32];
RNGCryptoServiceProvider.Fill(key);
Span <byte> nonce = stackalloc byte[24];
RNGCryptoServiceProvider.Fill(nonce);
crypto_lock(mac, cipherText, key, nonce, inputText);
var builder = new StringBuilder();
for (int i = 0; i < cipherText.Length; i++)
{
builder.Append($"{cipherText[i]:X2}");
}
Console.WriteLine($"cipher: {builder}");
Assert.False(cipherText.SequenceEqual(inputText), "crypto_lock failed. Spans are the same");
Assert.False(cipherText.SequenceEqual(emptyText), "crypto_lock failed. cipher text is empty");
// Verify that we get the same output from unlock
Span <byte> outputText = stackalloc byte[16];
crypto_unlock(outputText, key, nonce, mac, cipherText);
Assert.True(outputText.SequenceEqual(inputText), "crypto_unlock failed. Spans are different");
}
private byte[] Random()
{
byte[] r = new byte[Length];
RNGCryptoServiceProvider.Fill(r);
return(r);
}