ojluni/src/main/java/com/sun/security/auth/module/Crypt.java - platform/libcore.git - Git at Google

 /*
  * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 /*      Copyright (c) 1988 AT&T */
 /*        All Rights Reserved   */

 /**
  * Implements the UNIX crypt(3) function, based on a direct port of the
  * libc crypt function.
  *
  * <p>
  * From the crypt man page:
  * <p>
  * crypt() is the password encryption routine, based on the NBS
  * Data  Encryption  Standard,  with variations intended (among
  * other things) to frustrate use of  hardware  implementations
  * of the DES for key search.
  * <p>
  * The first argument to crypt() is  normally  a  user's  typed
  * password.   The  second  is a 2-character string chosen from
  * the set [a-zA-Z0-9./].  the  salt string is used to perturb
  * the DES algorithm in one
  * of 4096 different ways, after which the password is used  as
  * the  key  to  encrypt  repeatedly  a  constant  string.  The
  * returned value points to the encrypted password, in the same
  * alphabet as the salt.  The first two characters are the salt
  * itself.
  *
  * @author Roland Schemers
  */

 package com.sun.security.auth.module;

 class Crypt {

 /* EXPORT DELETE START */

     private static final byte[] IP = {
         58, 50, 42, 34, 26, 18, 10, 2,
         60, 52, 44, 36, 28, 20, 12, 4,
         62, 54, 46, 38, 30, 22, 14, 6,
         64, 56, 48, 40, 32, 24, 16, 8,
         57, 49, 41, 33, 25, 17, 9, 1,
         59, 51, 43, 35, 27, 19, 11, 3,
         61, 53, 45, 37, 29, 21, 13, 5,
         63, 55, 47, 39, 31, 23, 15, 7,
     };

     private static final byte[] FP = {
         40, 8, 48, 16, 56, 24, 64, 32,
         39, 7, 47, 15,  55, 23, 63, 31,
         38, 6, 46, 14, 54, 22, 62, 30,
         37, 5, 45, 13, 53, 21, 61, 29,
         36, 4, 44, 12, 52, 20, 60, 28,
         35, 3, 43, 11, 51, 19, 59, 27,
         34, 2, 42, 10, 50, 18, 58, 26,
         33, 1, 41, 9, 49, 17, 57, 25,
     };

     private static final byte[] PC1_C = {
         57, 49, 41, 33, 25, 17, 9,
         1, 58, 50, 42, 34, 26, 18,
         10, 2, 59, 51, 43, 35, 27,
         19, 11, 3, 60, 52, 44, 36,
     };

     private static final byte[] PC1_D = {
         63, 55, 47, 39, 31, 23, 15,
         7, 62, 54, 46, 38, 30, 22,
         14, 6, 61, 53, 45, 37, 29,
         21, 13, 5, 28, 20, 12, 4,
     };

     private static final byte[] shifts = { 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1, };

     private static final byte[] PC2_C = {
         14, 17, 11, 24, 1, 5,
         3, 28, 15, 6, 21, 10,
         23, 19, 12, 4, 26, 8,
         16, 7, 27, 20, 13, 2,
     };

     private static final byte[] PC2_D = {
         41,52,31,37,47,55,
         30,40,51,45,33,48,
         44,49,39,56,34,53,
         46,42,50,36,29,32,
     };

     private byte[] C = new byte[28];
     private byte[] D = new byte[28];

     private byte[] KS;

     private byte[] E = new byte[48];

     private static final byte[] e2 = {
         32, 1, 2, 3, 4, 5,
         4, 5, 6, 7, 8, 9,
         8, 9,10,11,12,13,
         12,13,14,15,16,17,
         16,17,18,19,20,21,
         20,21,22,23,24,25,
         24,25,26,27,28,29,
         28,29,30,31,32, 1,
     };

     private void setkey(byte[] key) {
         int i, j, k;
         byte t;

         if (KS == null) {
             KS = new byte[16*48];
         }

         for (i = 0; i < 28; i++) {
                 C[i] = key[PC1_C[i]-1];
                 D[i] = key[PC1_D[i]-1];
         }
         for (i = 0; i < 16; i++) {
                 for (k = 0; k < shifts[i]; k++) {
                         t = C[0];
                         for (j = 0; j < 28-1; j++)
                                 C[j] = C[j+1];
                         C[27] = t;
                         t = D[0];
                         for (j = 0; j < 28-1; j++)
                                 D[j] = D[j+1];
                         D[27] = t;
                 }
                 for (j = 0; j < 24; j++) {
                         int index = i * 48;

                         KS[index+j] = C[PC2_C[j]-1];
                         KS[index+j+24] = D[PC2_D[j]-28-1];
                 }
         }
         for (i = 0; i < 48; i++)
                 E[i] = e2[i];
     }


     private static final byte[][] S = {
         {14, 4,13, 1, 2,15,11, 8, 3,10, 6,12, 5, 9, 0, 7,
         0,15, 7, 4,14, 2,13, 1,10, 6,12,11, 9, 5, 3, 8,
         4, 1,14, 8,13, 6, 2,11,15,12, 9, 7, 3,10, 5, 0,
         15,12, 8, 2, 4, 9, 1, 7, 5,11, 3,14,10, 0, 6,13},

         {15, 1, 8,14, 6,11, 3, 4, 9, 7, 2,13,12, 0, 5,10,
         3,13, 4, 7,15, 2, 8,14,12, 0, 1,10, 6, 9,11, 5,
         0,14, 7,11,10, 4,13, 1, 5, 8,12, 6, 9, 3, 2,15,
         13, 8,10, 1, 3,15, 4, 2,11, 6, 7,12, 0, 5,14, 9},

         {10, 0, 9,14, 6, 3,15, 5, 1,13,12, 7,11, 4, 2, 8,
         13, 7, 0, 9, 3, 4, 6,10, 2, 8, 5,14,12,11,15, 1,
         13, 6, 4, 9, 8,15, 3, 0,11, 1, 2,12, 5,10,14, 7,
          1,10,13, 0, 6, 9, 8, 7, 4,15,14, 3,11, 5, 2,12},

         {7,13,14, 3, 0, 6, 9,10, 1, 2, 8, 5,11,12, 4,15,
         13, 8,11, 5, 6,15, 0, 3, 4, 7, 2,12, 1,10,14, 9,
         10, 6, 9, 0,12,11, 7,13,15, 1, 3,14, 5, 2, 8, 4,
          3,15, 0, 6,10, 1,13, 8, 9, 4, 5,11,12, 7, 2,14},

         {2,12, 4, 1, 7,10,11, 6, 8, 5, 3,15,13, 0,14, 9,
         14,11, 2,12, 4, 7,13, 1, 5, 0,15,10, 3, 9, 8, 6,
          4, 2, 1,11,10,13, 7, 8,15, 9,12, 5, 6, 3, 0,14,
         11, 8,12, 7, 1,14, 2,13, 6,15, 0, 9,10, 4, 5, 3},

         {12, 1,10,15, 9, 2, 6, 8, 0,13, 3, 4,14, 7, 5,11,
         10,15, 4, 2, 7,12, 9, 5, 6, 1,13,14, 0,11, 3, 8,
          9,14,15, 5, 2, 8,12, 3, 7, 0, 4,10, 1,13,11, 6,
          4, 3, 2,12, 9, 5,15,10,11,14, 1, 7, 6, 0, 8,13},

         {4,11, 2,14,15, 0, 8,13, 3,12, 9, 7, 5,10, 6, 1,
         13, 0,11, 7, 4, 9, 1,10,14, 3, 5,12, 2,15, 8, 6,
          1, 4,11,13,12, 3, 7,14,10,15, 6, 8, 0, 5, 9, 2,
          6,11,13, 8, 1, 4,10, 7, 9, 5, 0,15,14, 2, 3,12},

         {13, 2, 8, 4, 6,15,11, 1,10, 9, 3,14, 5, 0,12, 7,
          1,15,13, 8,10, 3, 7, 4,12, 5, 6,11, 0,14, 9, 2,
          7,11, 4, 1, 9,12,14, 2, 0, 6,10,13,15, 3, 5, 8,
          2, 1,14, 7, 4,10, 8,13,15,12, 9, 0, 3, 5, 6,11},
     };


     private static final byte[] P = {
         16, 7,20,21,
         29,12,28,17,
          1,15,23,26,
          5,18,31,10,
          2, 8,24,14,
         32,27, 3, 9,
         19,13,30, 6,
         22,11, 4,25,
     };

     private byte[]  L = new byte[64];
     private byte[] tempL = new byte[32];
     private byte[] f = new byte[32];
     private byte[] preS = new byte[48];


     private void encrypt(byte[] block,int fake) {
         int     i;
         int t, j, k;
         int R = 32; // &L[32]

         if (KS == null) {
             KS = new byte[16*48];
         }

         for(j=0; j < 64; j++) {
             L[j] = block[IP[j]-1];
         }
         for(i=0; i < 16; i++) {
             int index = i * 48;

             for(j=0; j < 32; j++) {
                 tempL[j] = L[R+j];
             }
             for(j=0; j < 48; j++) {
                 preS[j] = (byte) (L[R+E[j]-1] ^ KS[index+j]);
             }
             for(j=0; j < 8; j++) {
                 t = 6*j;
                 k = S[j][(preS[t+0]<<5)+
                          (preS[t+1]<<3)+
                          (preS[t+2]<<2)+
                          (preS[t+3]<<1)+
                          (preS[t+4]<<0)+
                          (preS[t+5]<<4)];
                 t = 4*j;
                 f[t+0] = (byte) ((k>>3)&01);
                 f[t+1] = (byte) ((k>>2)&01);
                 f[t+2] = (byte) ((k>>1)&01);
                 f[t+3] = (byte) ((k>>0)&01);
             }
             for(j=0; j < 32; j++) {
                         L[R+j] = (byte) (L[j] ^ f[P[j]-1]);
             }
             for(j=0; j < 32; j++) {
                         L[j] = tempL[j];
             }
         }
         for(j=0; j < 32; j++) {
             t = L[j];
             L[j] = L[R+j];
             L[R+j] = (byte)t;
         }
         for(j=0; j < 64; j++) {
                 block[j] = L[FP[j]-1];
         }
     }
 /* EXPORT DELETE END */

     /**
      * Creates a new Crypt object for use with the crypt method.
      *
      */

     public Crypt()
     {
         // does nothing at this time
         super();
     }

     /**
      * Implements the libc crypt(3) function.
      *
      * @param pw the password to "encrypt".
      *
      * @param salt the salt to use.
      *
      * @return A new byte[13] array that contains the encrypted
      * password. The first two characters are the salt.
      *
      */

     public synchronized byte[] crypt(byte[] pw, byte[] salt) {
         int c, i, j, pwi;
         byte temp;
         byte[] block = new byte[66];
         byte[] iobuf = new byte[13];

 /* EXPORT DELETE START */

         pwi = 0;

         for(i=0; pwi < pw.length && i < 64; pwi++) {
             c = pw[pwi];
             for(j=0; j < 7; j++, i++) {
                 block[i] = (byte) ((c>>(6-j)) & 01);
             }
             i++;
         }

         setkey(block);

         for(i=0; i < 66; i++) {
             block[i] = 0;
         }

         for(i=0; i < 2; i++) {
             c = salt[i];
             iobuf[i] = (byte)c;
             if(c > 'Z')
                 c -= 6;
             if(c > '9')
                 c -= 7;
             c -= '.';
             for(j=0; j < 6; j++) {
                 if( ((c>>j) & 01) != 0) {
                     temp = E[6*i+j];
                     E[6*i+j] = E[6*i+j+24];
                     E[6*i+j+24] = temp;
                 }
             }
         }

         for(i=0; i < 25; i++) {
                 encrypt(block,0);
         }

         for(i=0; i < 11; i++) {
             c = 0;
             for(j=0; j < 6; j++) {
                 c <<= 1;
                 c |= block[6*i+j];
             }
             c += '.';
             if(c > '9') {
                 c += 7;
             }
             if(c > 'Z') {
                 c += 6;
             }
             iobuf[i+2] = (byte)c;
         }
         //iobuf[i+2] = 0;
         if(iobuf[1] == 0) {
             iobuf[1] = iobuf[0];
         }
 /* EXPORT DELETE END */
         return(iobuf);
     }

     /**
      * program to test the crypt routine.
      *
      * The first parameter is the cleartext password, the second is
      * the salt to use. The salt should be two characters from the
      * set [a-zA-Z0-9./]. Outputs the crypt result.
      *
      * @param arg command line arguments.
      *
      */

     public static void main(String arg[]) {

         if (arg.length!=2) {
             System.err.println("usage: Crypt password salt");
             System.exit(1);
         }

         Crypt c = new Crypt();
         try {
             byte result[] = c.crypt
                 (arg[0].getBytes("ISO-8859-1"), arg[1].getBytes("ISO-8859-1"));
             for (int i=0; i<result.length; i++) {
                 System.out.println(" "+i+" "+(char)result[i]);
             }
         } catch (java.io.UnsupportedEncodingException uee) {
             // cannot happen
         }
     }
 }
	/*
	* Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/* Copyright (c) 1988 AT&T */
	/* All Rights Reserved */

	/**
	* Implements the UNIX crypt(3) function, based on a direct port of the
	* libc crypt function.
	*
	* <p>
	* From the crypt man page:
	* <p>
	* crypt() is the password encryption routine, based on the NBS
	* Data Encryption Standard, with variations intended (among
	* other things) to frustrate use of hardware implementations
	* of the DES for key search.
	* <p>
	* The first argument to crypt() is normally a user's typed
	* password. The second is a 2-character string chosen from
	* the set [a-zA-Z0-9./]. the salt string is used to perturb
	* the DES algorithm in one
	* of 4096 different ways, after which the password is used as
	* the key to encrypt repeatedly a constant string. The
	* returned value points to the encrypted password, in the same
	* alphabet as the salt. The first two characters are the salt
	* itself.
	*
	* @author Roland Schemers
	*/

	package com.sun.security.auth.module;

	class Crypt {

	/* EXPORT DELETE START */

	private static final byte[] IP = {
	58, 50, 42, 34, 26, 18, 10, 2,
	60, 52, 44, 36, 28, 20, 12, 4,
	62, 54, 46, 38, 30, 22, 14, 6,
	64, 56, 48, 40, 32, 24, 16, 8,
	57, 49, 41, 33, 25, 17, 9, 1,
	59, 51, 43, 35, 27, 19, 11, 3,
	61, 53, 45, 37, 29, 21, 13, 5,
	63, 55, 47, 39, 31, 23, 15, 7,
	};

	private static final byte[] FP = {
	40, 8, 48, 16, 56, 24, 64, 32,
	39, 7, 47, 15, 55, 23, 63, 31,
	38, 6, 46, 14, 54, 22, 62, 30,
	37, 5, 45, 13, 53, 21, 61, 29,
	36, 4, 44, 12, 52, 20, 60, 28,
	35, 3, 43, 11, 51, 19, 59, 27,
	34, 2, 42, 10, 50, 18, 58, 26,
	33, 1, 41, 9, 49, 17, 57, 25,
	};

	private static final byte[] PC1_C = {
	57, 49, 41, 33, 25, 17, 9,
	1, 58, 50, 42, 34, 26, 18,
	10, 2, 59, 51, 43, 35, 27,
	19, 11, 3, 60, 52, 44, 36,
	};

	private static final byte[] PC1_D = {
	63, 55, 47, 39, 31, 23, 15,
	7, 62, 54, 46, 38, 30, 22,
	14, 6, 61, 53, 45, 37, 29,
	21, 13, 5, 28, 20, 12, 4,
	};

	private static final byte[] shifts = { 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1, };

	private static final byte[] PC2_C = {
	14, 17, 11, 24, 1, 5,
	3, 28, 15, 6, 21, 10,
	23, 19, 12, 4, 26, 8,
	16, 7, 27, 20, 13, 2,
	};

	private static final byte[] PC2_D = {
	41,52,31,37,47,55,
	30,40,51,45,33,48,
	44,49,39,56,34,53,
	46,42,50,36,29,32,
	};

	private byte[] C = new byte[28];
	private byte[] D = new byte[28];

	private byte[] KS;

	private byte[] E = new byte[48];

	private static final byte[] e2 = {
	32, 1, 2, 3, 4, 5,
	4, 5, 6, 7, 8, 9,
	8, 9,10,11,12,13,
	12,13,14,15,16,17,
	16,17,18,19,20,21,
	20,21,22,23,24,25,
	24,25,26,27,28,29,
	28,29,30,31,32, 1,
	};

	private void setkey(byte[] key) {
	int i, j, k;
	byte t;

	if (KS == null) {
	KS = new byte[16*48];
	}

	for (i = 0; i < 28; i++) {
	C[i] = key[PC1_C[i]-1];
	D[i] = key[PC1_D[i]-1];
	}
	for (i = 0; i < 16; i++) {
	for (k = 0; k < shifts[i]; k++) {
	t = C[0];
	for (j = 0; j < 28-1; j++)
	C[j] = C[j+1];
	C[27] = t;
	t = D[0];
	for (j = 0; j < 28-1; j++)
	D[j] = D[j+1];
	D[27] = t;
	}
	for (j = 0; j < 24; j++) {
	int index = i * 48;

	KS[index+j] = C[PC2_C[j]-1];
	KS[index+j+24] = D[PC2_D[j]-28-1];
	}
	}
	for (i = 0; i < 48; i++)
	E[i] = e2[i];
	}


	private static final byte[][] S = {
	{14, 4,13, 1, 2,15,11, 8, 3,10, 6,12, 5, 9, 0, 7,
	0,15, 7, 4,14, 2,13, 1,10, 6,12,11, 9, 5, 3, 8,
	4, 1,14, 8,13, 6, 2,11,15,12, 9, 7, 3,10, 5, 0,
	15,12, 8, 2, 4, 9, 1, 7, 5,11, 3,14,10, 0, 6,13},

	{15, 1, 8,14, 6,11, 3, 4, 9, 7, 2,13,12, 0, 5,10,
	3,13, 4, 7,15, 2, 8,14,12, 0, 1,10, 6, 9,11, 5,
	0,14, 7,11,10, 4,13, 1, 5, 8,12, 6, 9, 3, 2,15,
	13, 8,10, 1, 3,15, 4, 2,11, 6, 7,12, 0, 5,14, 9},

	{10, 0, 9,14, 6, 3,15, 5, 1,13,12, 7,11, 4, 2, 8,
	13, 7, 0, 9, 3, 4, 6,10, 2, 8, 5,14,12,11,15, 1,
	13, 6, 4, 9, 8,15, 3, 0,11, 1, 2,12, 5,10,14, 7,
	1,10,13, 0, 6, 9, 8, 7, 4,15,14, 3,11, 5, 2,12},

	{7,13,14, 3, 0, 6, 9,10, 1, 2, 8, 5,11,12, 4,15,
	13, 8,11, 5, 6,15, 0, 3, 4, 7, 2,12, 1,10,14, 9,
	10, 6, 9, 0,12,11, 7,13,15, 1, 3,14, 5, 2, 8, 4,
	3,15, 0, 6,10, 1,13, 8, 9, 4, 5,11,12, 7, 2,14},

	{2,12, 4, 1, 7,10,11, 6, 8, 5, 3,15,13, 0,14, 9,
	14,11, 2,12, 4, 7,13, 1, 5, 0,15,10, 3, 9, 8, 6,
	4, 2, 1,11,10,13, 7, 8,15, 9,12, 5, 6, 3, 0,14,
	11, 8,12, 7, 1,14, 2,13, 6,15, 0, 9,10, 4, 5, 3},

	{12, 1,10,15, 9, 2, 6, 8, 0,13, 3, 4,14, 7, 5,11,
	10,15, 4, 2, 7,12, 9, 5, 6, 1,13,14, 0,11, 3, 8,
	9,14,15, 5, 2, 8,12, 3, 7, 0, 4,10, 1,13,11, 6,
	4, 3, 2,12, 9, 5,15,10,11,14, 1, 7, 6, 0, 8,13},

	{4,11, 2,14,15, 0, 8,13, 3,12, 9, 7, 5,10, 6, 1,
	13, 0,11, 7, 4, 9, 1,10,14, 3, 5,12, 2,15, 8, 6,
	1, 4,11,13,12, 3, 7,14,10,15, 6, 8, 0, 5, 9, 2,
	6,11,13, 8, 1, 4,10, 7, 9, 5, 0,15,14, 2, 3,12},

	{13, 2, 8, 4, 6,15,11, 1,10, 9, 3,14, 5, 0,12, 7,
	1,15,13, 8,10, 3, 7, 4,12, 5, 6,11, 0,14, 9, 2,
	7,11, 4, 1, 9,12,14, 2, 0, 6,10,13,15, 3, 5, 8,
	2, 1,14, 7, 4,10, 8,13,15,12, 9, 0, 3, 5, 6,11},
	};


	private static final byte[] P = {
	16, 7,20,21,
	29,12,28,17,
	1,15,23,26,
	5,18,31,10,
	2, 8,24,14,
	32,27, 3, 9,
	19,13,30, 6,
	22,11, 4,25,
	};

	private byte[] L = new byte[64];
	private byte[] tempL = new byte[32];
	private byte[] f = new byte[32];
	private byte[] preS = new byte[48];


	private void encrypt(byte[] block,int fake) {
	int i;
	int t, j, k;
	int R = 32; // &L[32]

	if (KS == null) {
	KS = new byte[16*48];
	}

	for(j=0; j < 64; j++) {
	L[j] = block[IP[j]-1];
	}
	for(i=0; i < 16; i++) {
	int index = i * 48;

	for(j=0; j < 32; j++) {
	tempL[j] = L[R+j];
	}
	for(j=0; j < 48; j++) {
	preS[j] = (byte) (L[R+E[j]-1] ^ KS[index+j]);
	}
	for(j=0; j < 8; j++) {
	t = 6*j;
	k = S[j][(preS[t+0]<<5)+
	(preS[t+1]<<3)+
	(preS[t+2]<<2)+
	(preS[t+3]<<1)+
	(preS[t+4]<<0)+
	(preS[t+5]<<4)];
	t = 4*j;
	f[t+0] = (byte) ((k>>3)&01);
	f[t+1] = (byte) ((k>>2)&01);
	f[t+2] = (byte) ((k>>1)&01);
	f[t+3] = (byte) ((k>>0)&01);
	}
	for(j=0; j < 32; j++) {
	L[R+j] = (byte) (L[j] ^ f[P[j]-1]);
	}
	for(j=0; j < 32; j++) {
	L[j] = tempL[j];
	}
	}
	for(j=0; j < 32; j++) {
	t = L[j];
	L[j] = L[R+j];
	L[R+j] = (byte)t;
	}
	for(j=0; j < 64; j++) {
	block[j] = L[FP[j]-1];
	}
	}
	/* EXPORT DELETE END */

	/**
	* Creates a new Crypt object for use with the crypt method.
	*
	*/

	public Crypt()
	{
	// does nothing at this time
	super();
	}

	/**
	* Implements the libc crypt(3) function.
	*
	* @param pw the password to "encrypt".
	*
	* @param salt the salt to use.
	*
	* @return A new byte[13] array that contains the encrypted
	* password. The first two characters are the salt.
	*
	*/

	public synchronized byte[] crypt(byte[] pw, byte[] salt) {
	int c, i, j, pwi;
	byte temp;
	byte[] block = new byte[66];
	byte[] iobuf = new byte[13];

	/* EXPORT DELETE START */

	pwi = 0;

	for(i=0; pwi < pw.length && i < 64; pwi++) {
	c = pw[pwi];
	for(j=0; j < 7; j++, i++) {
	block[i] = (byte) ((c>>(6-j)) & 01);
	}
	i++;
	}

	setkey(block);

	for(i=0; i < 66; i++) {
	block[i] = 0;
	}

	for(i=0; i < 2; i++) {
	c = salt[i];
	iobuf[i] = (byte)c;
	if(c > 'Z')
	c -= 6;
	if(c > '9')
	c -= 7;
	c -= '.';
	for(j=0; j < 6; j++) {
	if( ((c>>j) & 01) != 0) {
	temp = E[6*i+j];
	E[6i+j] = E[6i+j+24];
	E[6*i+j+24] = temp;
	}
	}
	}

	for(i=0; i < 25; i++) {
	encrypt(block,0);
	}

	for(i=0; i < 11; i++) {
	c = 0;
	for(j=0; j < 6; j++) {
	c <<= 1;
	c \|= block[6*i+j];
	}
	c += '.';
	if(c > '9') {
	c += 7;
	}
	if(c > 'Z') {
	c += 6;
	}
	iobuf[i+2] = (byte)c;
	}
	//iobuf[i+2] = 0;
	if(iobuf[1] == 0) {
	iobuf[1] = iobuf[0];
	}
	/* EXPORT DELETE END */
	return(iobuf);
	}

	/**
	* program to test the crypt routine.
	*
	* The first parameter is the cleartext password, the second is
	* the salt to use. The salt should be two characters from the
	* set [a-zA-Z0-9./]. Outputs the crypt result.
	*
	* @param arg command line arguments.
	*
	*/

	public static void main(String arg[]) {

	if (arg.length!=2) {
	System.err.println("usage: Crypt password salt");
	System.exit(1);
	}

	Crypt c = new Crypt();
	try {
	byte result[] = c.crypt
	(arg[0].getBytes("ISO-8859-1"), arg[1].getBytes("ISO-8859-1"));
	for (int i=0; i<result.length; i++) {
	System.out.println(" "+i+" "+(char)result[i]);
	}
	} catch (java.io.UnsupportedEncodingException uee) {
	// cannot happen
	}
	}
	}