public static byte[] GetHash(byte[] input)
{
if (null == input)
{
throw new System.ArgumentNullException("input", "Unable to calculate hash over null input data");
}
//Intitial values defined in RFC 1321
ABCDStruct abcd = new ABCDStruct {
A = 0x67452301, B = 0xefcdab89, C = 0x98badcfe, D = 0x10325476
};
//We pass in the input array by block, the final block of data must be handled specialy for padding & length embeding
int startIndex = 0;
while (startIndex <= input.Length - 64)
{
MD5Core.GetHashBlock(input, ref abcd, startIndex);
startIndex += 64;
}
// The final data block.
return(MD5Core.GetHashFinalBlock(input, startIndex, input.Length - startIndex, abcd, (Int64)input.Length * 8));
}
/// <summary>
/// When overridden in a derived class, finalizes the hash computation after the last data is processed by the cryptographic stream object.
/// </summary>
/// <returns>The computed hash code.</returns>
protected override byte[] HashFinal()
{
base.HashValue = MD5Core.GetHashFinalBlock(_data, 0, _dataSize, _abcd, _totalLength * 8);
return(base.HashValue);
}
