- /*
- * @(#)Crypt.java 1.5 03/01/23
- *
- * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
- * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
- */
-
- /* Copyright (c) 1988 AT&T */
- /* All Rights Reserved */
-
- /* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
- /* The copyright notice above does not evidence any */
- /* actual or intended publication of such source code. */
-
-
- /**
- * 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.
- *
- * @version 1.5, 01/11/00
- * @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();
- byte result[] = c.crypt(arg[0].getBytes(), arg[1].getBytes());
- for (int i=0; i<result.length; i++) {
- System.out.println(" "+i+" "+(char)result[i]);
- }
- }
- }