Package com.aoindustries.md5

Class MD5

  • public class MD5
extends Object
    Implementation of RSA's MD5 hash generator
    Version:
    $Revision: 1.2 $
    Author:
    Santeri Paavolainen <sjpaavol@cc.helsinki.fi>

    • Constructor Summary

      Constructors 
      Constructor Description
      MD5()
      Class constructor
      MD5​(Object ob)
      Initialize class, and update hash with ob.toString()

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      String asHex()
      Returns 32-character hex representation of this objects hash
      static String asHex​(byte[] hash)
      Turns array of bytes into string representing each byte as unsigned hex number.
      byte[] Final()
      Returns array of bytes (16 bytes) representing hash as of the current state of this object.
      static long getMD5Hi​(byte[] md5)  
      static long getMD5Hi​(String md5)  
      static long getMD5Lo​(byte[] md5)  
      static long getMD5Lo​(String md5)  
      static String getMD5String​(long md5_hi, long md5_lo)  
      void Init()
      Initialize MD5 internal state (object can be reused just by calling Init() after every Final()
      void Update​(byte b)
      Updates hash with a single byte
      void Update​(byte[] buffer)
      Updates hash with given array of bytes
      void Update​(byte[] buffer, int length)  
      void Update​(byte[] buffer, int offset, int length)
      Plain update, updates this object
      void Update​(int i)
      Update buffer with a single integer (only & 0xff part is used, as a byte)
      void Update​(String s)
      Update buffer with given string.

    • Constructor Detail

      • MD5

        public MD5()
        Class constructor

      • MD5

        public MD5​(Object ob)
        Initialize class, and update hash with ob.toString()
        Parameters:
        ob - Object, ob.toString() is used to update hash after initialization

    • Method Detail

      • Init

        public final void Init()
        Initialize MD5 internal state (object can be reused just by calling Init() after every Final()

      • Update

        public void Update​(byte[] buffer,
                   int offset,
                   int length)
        Plain update, updates this object

      • Update

        public void Update​(byte[] buffer,
                   int length)

      • Update

        public void Update​(byte[] buffer)
        Updates hash with given array of bytes
        Parameters:
        buffer - Array of bytes to use for updating the hash

      • Update

        public void Update​(byte b)
        Updates hash with a single byte
        Parameters:
        b - Single byte to update the hash

      • Update

        public final void Update​(String s)
        Update buffer with given string.
        Parameters:
        s - String to be update to hash (is used as s.getBytes())

      • Update

        public void Update​(int i)
        Update buffer with a single integer (only & 0xff part is used, as a byte)
        Parameters:
        i - Integer value, which is then converted to byte as i & 0xff

      • Final

        public byte[] Final()
        Returns array of bytes (16 bytes) representing hash as of the current state of this object. Note: getting a hash does not invalidate the hash object, it only creates a copy of the real state which is finalized.
        Returns:
        Array of 16 bytes, the hash of all updated bytes

      • asHex

        public static String asHex​(byte[] hash)
        Turns array of bytes into string representing each byte as unsigned hex number.
        Parameters:
        hash - Array of bytes to convert to hex-string
        Returns:
        Generated hex string

      • asHex

        public String asHex()
        Returns 32-character hex representation of this objects hash
        Returns:
        String of this object's hash

      • getMD5String

        public static String getMD5String​(long md5_hi,
                                  long md5_lo)

      • getMD5Hi

        public static long getMD5Hi​(byte[] md5)

      • getMD5Lo

        public static long getMD5Lo​(byte[] md5)