Package org.eclipse.jetty.util.security

Class UnixCrypt

  • public class UnixCrypt
extends java.lang.Object
    Unix Crypt. Implements the one way cryptography used by Unix systems for simple password protection.
    Version:
    $Id: UnixCrypt.java,v 1.1 2005/10/05 14:09:14 janb Exp $

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private static byte[] A64TOI  
      private static long[][] CF6464  
      private static byte[] CIFP  
      private static byte[] ExpandTr  
      private static long[][] IE3264  
      private static byte[] IP  
      private static byte[] ITOA64  
      private static byte[] P32Tr  
      private static byte[] PC1  
      private static long[][] PC1ROT  
      private static byte[] PC2  
      private static long[][][] PC2ROT  
      private static byte[] Rotates  
      private static byte[][] S  
      private static long[][] SPE  

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private UnixCrypt()
      You can't call the constructer.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.String crypt​(java.lang.String key, java.lang.String setting)
      Encrypts String into crypt (Unix) code.
      private static long des_cipher​(long in, int salt, int num_iter, long[] KS)
      Returns the DES encrypted code of the given word with the specified environment.
      private static long[] des_setkey​(long keyword)
      Returns the key schedule for the given key.
      private static void init_perm​(long[][] perm, byte[] p, int chars_out)
      Initializes the given permutation table with the mapping table.
      static void main​(java.lang.String[] arg)  
      private static long perm3264​(int c, long[][] p)
      Returns the permutation of the given 32-bit code with the specified permutataion table.
      private static long perm6464​(long c, long[][] p)
      Returns the permutation of the given 64-bit code with the specified permutataion table.
      private static int to_six_bit​(int num)
      Returns the transposed and split code of a 24-bit code into a 4-byte code, each having 6 bits.
      private static long to_six_bit​(long num)
      Returns the transposed and split code of two 24-bit code into two 4-byte code, each having 6 bits.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • IP

        private static final byte[] IP

      • ExpandTr

        private static final byte[] ExpandTr

      • PC1

        private static final byte[] PC1

      • Rotates

        private static final byte[] Rotates

      • PC2

        private static final byte[] PC2

      • S

        private static final byte[][] S

      • P32Tr

        private static final byte[] P32Tr

      • CIFP

        private static final byte[] CIFP

      • ITOA64

        private static final byte[] ITOA64

      • A64TOI

        private static final byte[] A64TOI

      • PC1ROT

        private static final long[][] PC1ROT

      • PC2ROT

        private static final long[][][] PC2ROT

      • IE3264

        private static final long[][] IE3264

      • SPE

        private static final long[][] SPE

      • CF6464

        private static final long[][] CF6464

    • Constructor Detail

      • UnixCrypt

        private UnixCrypt()
        You can't call the constructer.

    • Method Detail

      • to_six_bit

        private static int to_six_bit​(int num)
        Returns the transposed and split code of a 24-bit code into a 4-byte code, each having 6 bits.

      • to_six_bit

        private static long to_six_bit​(long num)
        Returns the transposed and split code of two 24-bit code into two 4-byte code, each having 6 bits.

      • perm6464

        private static long perm6464​(long c,
                             long[][] p)
        Returns the permutation of the given 64-bit code with the specified permutataion table.

      • perm3264

        private static long perm3264​(int c,
                             long[][] p)
        Returns the permutation of the given 32-bit code with the specified permutataion table.

      • des_setkey

        private static long[] des_setkey​(long keyword)
        Returns the key schedule for the given key.

      • des_cipher

        private static long des_cipher​(long in,
                               int salt,
                               int num_iter,
                               long[] KS)
        Returns the DES encrypted code of the given word with the specified environment.

      • init_perm

        private static void init_perm​(long[][] perm,
                              byte[] p,
                              int chars_out)
        Initializes the given permutation table with the mapping table.

      • crypt

        public static java.lang.String crypt​(java.lang.String key,
                                     java.lang.String setting)
        Encrypts String into crypt (Unix) code.
        Parameters:
        key - the key to be encrypted
        setting - the salt to be used
        Returns:
        the encrypted String

      • main

        public static void main​(java.lang.String[] arg)