public static void TestOneMillionBytes()
{
var message = Enumerable.Repeat((byte)0, 1000000).ToArray();
using (var hash = new SipHash(SpecificationKey))
AssertEqual(hash.ComputeHash(message), 0x28205108397aa742UL);
}
public static void TestSevenBytes()
{
var message = Encoding.UTF8.GetBytes("SipHash");
using (var hash = new SipHash(SpecificationKey))
AssertEqual(hash.ComputeHash(message), 0x8325093242a96f60UL);
}
public static void TestEightBytes()
{
var message = Encoding.UTF8.GetBytes("12345678");
using (var hash = new SipHash(SpecificationKey))
AssertEqual(hash.ComputeHash(message), 0x2130609caea37ebUL);
}
public static void TestSixBytes()
{
var message = Encoding.UTF8.GetBytes("abcdef");
using (var hash = new SipHash(SpecificationKey))
AssertEqual(hash.ComputeHash(message), 0x2a6e77e733c7c05dUL);
}
public static void TestSingleByte()
{
var message = new byte[] { 0x61 };
using (var hash = new SipHash(SpecificationKey))
AssertEqual(hash.ComputeHash(message), 0x2ba3e8e9a71148caUL);
}
public static void TestEmptyMessage()
{
var message = new byte[0];
using (var hash = new SipHash(SpecificationKey))
AssertEqual(hash.ComputeHash(message), 0x726fdb47dd0e0e31UL);
}
public string CalculateHash(string message, string littleEndianKey)
{
var messageBytes = Encoding.ASCII.GetBytes(message);
var byteKey = BigInteger.Parse(littleEndianKey, NumberStyles.HexNumber).ToByteArray();
var hasher = new SipHash(byteKey);
var hash = hasher.ComputeHash(messageBytes);
var stringHash = BitConverter.ToUInt64(hash, 0).ToString("X");
return PadHash(stringHash);
}
internal SipState(byte[] key, int compressionRounds, int finalizationRounds)
{
SipHash.ValidateArguments(key, compressionRounds, finalizationRounds);
var k0 = BitConverter.ToUInt64(key, 0);
var k1 = BitConverter.ToUInt64(key, 8);
// "somepseudorandomlychosenbytes". See §4
_v[0] = 0x736f6d6570736575UL ^ k0;
_v[1] = 0x646f72616e646f6dUL ^ k1;
_v[2] = 0x6c7967656e657261UL ^ k0;
_v[3] = 0x7465646279746573UL ^ k1;
CompressionRounds = compressionRounds;
FinalizationRounds = finalizationRounds;
}
public static void TestBlockHash(int blockSize)
{
using (var hash = new SipHash(SpecificationKey))
AssertEqual(BlockHash(hash, SpecificationMessage, 0, blockSize), 0xa129ca6149be45e5UL);
}
/***
* Tests adapted from https://github.com/emboss/siphash-java/blob/master/test/com/github/emboss/siphash/SipHashTest.java
* Thanks to Martin Boßlet for these, which allowed me to quickly verify (presumable) correct functionality.
***/
public static void TestSpecification()
{
using (var hash = new SipHash(SpecificationKey))
AssertEqual(hash.ComputeHash(SpecificationMessage), 0xa129ca6149be45e5UL);
}