/// <summary>
/// Gets the hash of the specified data buffer.
/// </summary>
/// <param name="data">Data buffer.</param>
/// <param name="len">Length of the data buffer to hash.</param>
/// <param name="hash">Byte array of the hash value.</param>
public static string Data(byte[] data, uint len, out byte[] hash)
{
UInt16 localhashInt;
localhashInt = 0x0000;
for (int i = 0; i < len; i++)
{
localhashInt = (ushort)((localhashInt << 8) ^ table[data[i] ^ (localhashInt >> 8 & 0xFF)]);
}
localhashInt = (ushort)~localhashInt;
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
hash = BigEndianBitConverter.GetBytes(localhashInt);
StringBuilder crc16Output = new StringBuilder();
for (int i = 0; i < hash.Length; i++)
{
crc16Output.Append(hash[i].ToString("x2"));
}
return(crc16Output.ToString());
}
/// <summary>
/// Gets the hash of a file in hexadecimal and as a byte array.
/// </summary>
/// <param name="filename">File path.</param>
/// <param name="hash">Byte array of the hash value.</param>
public static string File(string filename, out byte[] hash)
{
FileStream fileStream = new FileStream(filename, FileMode.Open);
UInt16 localhashInt;
localhashInt = 0x0000;
for (int i = 0; i < fileStream.Length; i++)
{
localhashInt = (ushort)((localhashInt << 8) ^ table[fileStream.ReadByte() ^ (localhashInt >> 8 & 0xFF)]);
}
localhashInt = (ushort)~localhashInt;
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
hash = BigEndianBitConverter.GetBytes(localhashInt);
StringBuilder crc16Output = new StringBuilder();
for (int i = 0; i < hash.Length; i++)
{
crc16Output.Append(hash[i].ToString("x2"));
}
return(crc16Output.ToString());
}
/// <summary>
/// Returns a hexadecimal representation of the hash value.
/// </summary>
public string End()
{
hashInt = (ushort)~hashInt;
StringBuilder crc16Output = new StringBuilder();
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
for (int i = 0; i < BigEndianBitConverter.GetBytes(hashInt).Length; i++)
{
crc16Output.Append(BigEndianBitConverter.GetBytes(hashInt)[i].ToString("x2"));
}
return(crc16Output.ToString());
}
/// <summary>
/// Returns a byte array of the hash value.
/// </summary>
public byte[] Final()
{
hashInt = (ushort)~hashInt;
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
return(BigEndianBitConverter.GetBytes(hashInt));
}