Package io.getlime.security.powerauth.crypto.lib.util

Class CRC16

java.lang.Object
io.getlime.security.powerauth.crypto.lib.util.CRC16
All Implemented Interfaces:
Checksum
public class CRC16 extends Object implements Checksum
Class which computes CRC-16 of input data providing standard Checksum interface.

The algorithm uses irreducible polynomial 1 + x^2 + x^15 + x^16.

Author:
Roman Strobl, roman.strobl@wultra.com

  • Constructor Summary

    Constructors
    Constructor
    Description
    CRC16()
    Default constructor.

  • Method Summary

    Modifier and Type
    Method
    Description
    long
    getValue()
    Return the current CRC-16 value.
    void
    reset()
    Reset CRC-16 to initial value.
    void
    update(byte[] bytes, int offset, int length)
    Update the CRC-16 checksum with specified array of bytes.
    void
    update(int b)
    Update the CRC-16 checksum with the specified byte (the low eight bits of the argument b).

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface java.util.zip.Checksum

    update, update

  • Constructor Details

    • CRC16

      public CRC16()
      Default constructor.

  • Method Details

    • update

      public void update(int b)
      Update the CRC-16 checksum with the specified byte (the low eight bits of the argument b).
      Specified by:
      update in interface Checksum
      Parameters:
      b - The byte to update the checksum with.

    • update

      public void update(byte[] bytes, int offset, int length)
      Update the CRC-16 checksum with specified array of bytes.
      Specified by:
      update in interface Checksum
      Parameters:
      bytes - The byte array to update the checksum with.
      offset - The start offset of the data.
      length - The number of bytes to use for the update.

    • getValue

      public long getValue()
      Return the current CRC-16 value.
      Specified by:
      getValue in interface Checksum
      Returns:
      Current CRC-16 value.

    • reset

      public void reset()
      Reset CRC-16 to initial value.
      Specified by:
      reset in interface Checksum