public void Decode_ShortForm_ShouldDecodeCorrectly()
{
var data = new Queue <byte>();
data.Enqueue(0x14);
var length = DerAsnLength.Decode(data);
Assert.That(data, Is.Empty);
Assert.That(length.Length, Is.EqualTo(20));
data.Enqueue(0x7F);
length = DerAsnLength.Decode(data);
Assert.That(data, Is.Empty);
Assert.That(length.Length, Is.EqualTo(127));
}
public void Decode_LongForm_ShouldDecodeCorrectly()
{
var data = new Queue <byte>();
data.Enqueue(0x81); data.Enqueue(0x80);
var length = DerAsnLength.Decode(data);
Assert.That(data, Is.Empty);
Assert.That(length.Length, Is.EqualTo(128));
data.Enqueue(0x81); data.Enqueue(0xC9);
length = DerAsnLength.Decode(data);
Assert.That(data, Is.Empty);
Assert.That(length.Length, Is.EqualTo(201));
data.Enqueue(0x83); data.Enqueue(0x01); data.Enqueue(0xE2); data.Enqueue(0x40);
length = DerAsnLength.Decode(data);
Assert.That(data, Is.Empty);
Assert.That(length.Length, Is.EqualTo(123456));
}
public void Decode_NotEnoughBytes_ShouldThrowInvalidOperationException()
{
var data = new Queue <byte>(new byte[] { 0x83, 0x81, 0xE2 });
Assert.Throws <InvalidOperationException>(() => DerAsnLength.Decode(data));
}