Package de.das.encrypter.tools

Class CRC

java.lang.Object
de.das.encrypter.tools.CRC
public class CRC extends Object
This class includes the methods to calculate the CRC's.

  • Constructor Summary

    Constructors
    Constructor
    Description
    CRC()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static int
    CRC_16_byte(int prevValue, byte nextByte)
    Method which belongs to the calculation of 16-Bit CRC.
    static long
    CRC_32_byte(long prevValue, byte nextByte)
    Processing of one byte to create a CRC-32 value for a byte array.
    static int
    getCRC_16(byte[] data)
     
    static int
    getCRC_16(byte[] data, int ignore)
    Generates a CRC16 checksum for the given byte array without the number of bytes specified by the value "ignore" at the end of the byte array.
    static long
    getCRC_32(byte[] data)
    Method to determine the CRC-32 values for a given byte array.
    static long
    getCRC_32(byte[] data, int omit)
    Method to determine the CRC-32 values for a given byte array.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • CRC

      public CRC()

  • Method Details

    • getCRC_16

      public static int getCRC_16(byte[] data)

    • getCRC_16

      public static int getCRC_16(byte[] data, int ignore)
      Generates a CRC16 checksum for the given byte array without the number of bytes specified by the value "ignore" at the end of the byte array.
      Parameters:
      data - a given byte array.
      ignore - the number of bytes at the end of the byte array.
      Returns:
      the generated CRC16 value.

    • CRC_16_byte

      public static int CRC_16_byte(int prevValue, byte nextByte)
      Method which belongs to the calculation of 16-Bit CRC.

    • getCRC_32

      public static long getCRC_32(byte[] data)
      Method to determine the CRC-32 values for a given byte array. CRC start value is set to 0xFFFFFFFF and the generator polynom is 0x04C11DB7L according to IEEE 802.3
      Parameters:
      data - a byte array for which a CRC-32 value is requested.
      Returns:
      the CRC-32 value over the given data.

    • getCRC_32

      public static long getCRC_32(byte[] data, int omit)
      Method to determine the CRC-32 values for a given byte array. CRC start value is set to 0xFFFFFFFF and the generator polynom is 0x04C11DB7L according to IEEE 802.3
      Parameters:
      data - a byte array for which a CRC-32 value is requested.
      omit - the number of bytes at the end of the array not to include.
      Returns:
      the CRC-32 value over the given data.

    • CRC_32_byte

      public static long CRC_32_byte(long prevValue, byte nextByte)
      Processing of one byte to create a CRC-32 value for a byte array.
      Parameters:
      prevValue -
      nextByte -
      Returns: