public override void PerformTest()
{
byte[] key = Hex.Decode("000102030405060708090a0b0c0d0e0f");
byte[] input = Hex.Decode("000102030405060708090a0b0c0d0e");
long expected = unchecked((long)0xa129ca6149be45e5);
SipHash mac = new SipHash();
mac.Init(new KeyParameter(key));
mac.BlockUpdate(input, 0, input.Length);
long result = mac.DoFinal();
if (expected != result)
{
Fail("Result does not match expected value for DoFinal()");
}
// NOTE: Little-endian representation of 0xa129ca6149be45e5
byte[] expectedBytes = Hex.Decode("e545be4961ca29a1");
mac.BlockUpdate(input, 0, input.Length);
byte[] output = new byte[mac.GetMacSize()];
int len = mac.DoFinal(output, 0);
if (len != output.Length)
{
Fail("Result length does not equal GetMacSize() for DoFinal(byte[],int)");
}
if (!AreEqual(expectedBytes, output))
{
Fail("Result does not match expected value for DoFinal(byte[],int)");
}
}
protected virtual void ApplySipRounds(int n)
{
long num = this.v0;
long num2 = this.v1;
long num3 = this.v2;
long num4 = this.v3;
for (int i = 0; i < n; i++)
{
num += num2;
num3 += num4;
num2 = SipHash.RotateLeft(num2, 13);
num4 = SipHash.RotateLeft(num4, 16);
num2 ^= num;
num4 ^= num3;
num = SipHash.RotateLeft(num, 32);
num3 += num2;
num += num4;
num2 = SipHash.RotateLeft(num2, 17);
num4 = SipHash.RotateLeft(num4, 21);
num2 ^= num3;
num4 ^= num;
num3 = SipHash.RotateLeft(num3, 32);
}
this.v0 = num;
this.v1 = num2;
this.v2 = num3;
this.v3 = num4;
}
private void RunMac(byte[] key, byte[] input, int updateType)
{
long expected = unchecked((long)0xa129ca6149be45e5);
SipHash mac = new SipHash();
mac.Init(new KeyParameter(key));
UpdateMac(mac, input, updateType);
long result = mac.DoFinal();
if (expected != result)
{
Fail("Result does not match expected value for DoFinal()");
}
// NOTE: Little-endian representation of 0xa129ca6149be45e5
byte[] expectedBytes = Hex.Decode("e545be4961ca29a1");
UpdateMac(mac, input, updateType);
byte[] output = new byte[mac.GetMacSize()];
int len = mac.DoFinal(output, 0);
if (len != output.Length)
{
Fail("Result length does not equal GetMacSize() for DoFinal(byte[],int)");
}
if (!AreEqual(expectedBytes, output))
{
Fail("Result does not match expected value for DoFinal(byte[],int)");
}
}
private void RandomTest(SecureRandom random)
{
byte[] key = new byte[16];
random.NextBytes(key);
int length = 1 + random.Next(1024);
byte[] input = new byte[length];
random.NextBytes(input);
SipHash mac = new SipHash();
mac.Init(new KeyParameter(key));
UpdateMac(mac, input, UPDATE_BYTES);
long result1 = mac.DoFinal();
UpdateMac(mac, input, UPDATE_FULL);
long result2 = mac.DoFinal();
UpdateMac(mac, input, UPDATE_MIX);
long result3 = mac.DoFinal();
if (result1 != result2 || result1 != result3)
{
Fail("Inconsistent results in random test");
}
}
private void UpdateMac(SipHash mac, byte[] input, int updateType)
{
switch (updateType)
{
case UPDATE_BYTES:
{
for (int i = 0; i < input.Length; ++i)
{
mac.Update(input[i]);
}
break;
}
case UPDATE_FULL:
{
mac.BlockUpdate(input, 0, input.Length);
break;
}
case UPDATE_MIX:
{
int step = System.Math.Max(1, input.Length / 3);
int pos = 0;
while (pos < input.Length)
{
mac.Update(input[pos++]);
int len = System.Math.Min(input.Length - pos, step);
mac.BlockUpdate(input, pos, len);
pos += len;
}
break;
}
default:
throw new InvalidOperationException();
}
}
