public static void EmptyReturnTrue()
{
int byteLength = 0;
byte[] rented = ArrayPool <byte> .Shared.Rent(byteLength);
Span <byte> testSpan = new Span <byte>(rented, 0, byteLength);
Fill(rented, 0, byteLength);
ReadOnlySpan <byte> emptySpan = ReadOnlySpan <byte> .Empty;
bool isEqualA = CryptographicOperations.FixedTimeEquals(testSpan, emptySpan);
bool isEqualB = CryptographicOperations.FixedTimeEquals(emptySpan, testSpan);
ArrayPool <byte> .Shared.Return(rented);
Assert.True(isEqualA, "FixedTimeEquals(testSpan, emptySpan)");
Assert.True(isEqualB, "FixedTimeEquals(emptySpan, testSpan)");
}
public static void EqualReturnsTrue(int byteLength)
{
byte[] rented = ArrayPool <byte> .Shared.Rent(byteLength);
Span <byte> testSpan = new Span <byte>(rented, 0, byteLength);
Fill(rented, 0, byteLength);
byte[] rented2 = ArrayPool <byte> .Shared.Rent(byteLength);
Span <byte> testSpan2 = new Span <byte>(rented2, 0, byteLength);
testSpan.CopyTo(testSpan2);
bool isEqual = CryptographicOperations.FixedTimeEquals(testSpan, testSpan2);
ArrayPool <byte> .Shared.Return(rented);
ArrayPool <byte> .Shared.Return(rented2);
Assert.True(isEqual);
}
public static void DifferentLengthsReturnFalse(int byteLength)
{
byte[] rented = ArrayPool <byte> .Shared.Rent(byteLength);
Span <byte> testSpan = new Span <byte>(rented, 0, byteLength);
Fill(rented, 0, byteLength);
byte[] rented2 = ArrayPool <byte> .Shared.Rent(byteLength);
Span <byte> testSpan2 = new Span <byte>(rented2, 0, byteLength);
testSpan.CopyTo(testSpan2);
bool isEqualA = CryptographicOperations.FixedTimeEquals(testSpan, testSpan2.Slice(0, byteLength - 1));
bool isEqualB = CryptographicOperations.FixedTimeEquals(testSpan.Slice(0, byteLength - 1), testSpan2);
ArrayPool <byte> .Shared.Return(rented);
ArrayPool <byte> .Shared.Return(rented2);
Assert.False(isEqualA, "value, value missing last byte");
Assert.False(isEqualB, "value missing last byte, value");
}
