private static void CalculateHash_ValidateDeterminism(HashingAlgorithmSpecification algorithm, SaltingMode saltingMode, Boolean shouldBeDeterministic)
{
using (var randomnessProvider = RandomNumberGenerator.Create())
{
// Arrange.
var binarySerializer = new BinaryPassThroughSerializer();
var target = new HashingProcessor <Byte[]>(randomnessProvider, binarySerializer);
var plaintextObject = new Byte[] { 0x01, 0x02, 0x03, 0x04, 0x05 };
// Act.
var firstHashValue = target.CalculateHash(plaintextObject, algorithm, saltingMode);
// Assert.
firstHashValue.Should().NotBeNullOrEmpty();
firstHashValue.Count(value => value == 0x00).Should().NotBe(firstHashValue.Length);
ValidateDigestLength(firstHashValue, algorithm, saltingMode, target.SaltLengthInBytes);
// Act.
var secondHashValue = target.CalculateHash(plaintextObject, algorithm, saltingMode);
// Assert.
secondHashValue.Should().NotBeNullOrEmpty();
secondHashValue.Length.Should().Be(firstHashValue.Length);
secondHashValue.Count(value => value == 0x00).Should().NotBe(secondHashValue.Length);
if (shouldBeDeterministic)
{
// Assert.
firstHashValue.ComputeThirtyTwoBitHash().Should().Be(secondHashValue.ComputeThirtyTwoBitHash());
}
else
{
// Assert.
firstHashValue.ComputeThirtyTwoBitHash().Should().NotBe(secondHashValue.ComputeThirtyTwoBitHash());
}
}
}
private static void EvaluateHash_ShouldProduceDesiredResults(HashingAlgorithmSpecification algorithm, SaltingMode saltingMode)
{
using (var randomnessProvider = RandomNumberGenerator.Create())
{
// Arrange.
var binarySerializer = new BinaryPassThroughSerializer();
var target = new HashingProcessor <Byte[]>(randomnessProvider, binarySerializer);
var plaintextObject = new Byte[] { 0x01, 0x02, 0x03, 0x04, 0x05 };
var matchingHashValue = target.CalculateHash(plaintextObject, algorithm, saltingMode);
var nonMatchingHashValue = matchingHashValue.PerformCircularBitShift(Core.BitShiftDirection.Left, 16);
// Act.
var resultOne = target.EvaluateHash(matchingHashValue, plaintextObject, algorithm, saltingMode);
var resultTwo = target.EvaluateHash(nonMatchingHashValue, plaintextObject, algorithm, saltingMode);
// Assert.
resultOne.Should().BeTrue();
resultTwo.Should().BeFalse();
ValidateDigestLength(matchingHashValue, algorithm, saltingMode, target.SaltLengthInBytes);
}
}