xref: /onnv-gate/usr/src/lib/libcrypt/common/des_crypt.c (revision 6812:febeba71273d)
10Sstevel@tonic-gate /*
20Sstevel@tonic-gate  * CDDL HEADER START
30Sstevel@tonic-gate  *
40Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
53864Sraf  * Common Development and Distribution License (the "License").
63864Sraf  * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate  *
80Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate  * See the License for the specific language governing permissions
110Sstevel@tonic-gate  * and limitations under the License.
120Sstevel@tonic-gate  *
130Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate  *
190Sstevel@tonic-gate  * CDDL HEADER END
200Sstevel@tonic-gate  */
211219Sraf 
223864Sraf /*
23*6812Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
243864Sraf  * Use is subject to license terms.
253864Sraf  */
263864Sraf 
270Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
280Sstevel@tonic-gate /*	  All Rights Reserved  	*/
290Sstevel@tonic-gate 
300Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
310Sstevel@tonic-gate 
32*6812Sraf #pragma weak _des_crypt = des_crypt
33*6812Sraf #pragma weak _des_encrypt = des_encrypt
34*6812Sraf #pragma weak _des_setkey = des_setkey
350Sstevel@tonic-gate 
360Sstevel@tonic-gate #include <sys/types.h>
370Sstevel@tonic-gate #include <crypt.h>
380Sstevel@tonic-gate #include "des_soft.h"
390Sstevel@tonic-gate 
400Sstevel@tonic-gate #include <stdlib.h>
410Sstevel@tonic-gate #include <thread.h>
423864Sraf #include <pthread.h>
430Sstevel@tonic-gate #include <sys/types.h>
440Sstevel@tonic-gate 
450Sstevel@tonic-gate /* EXPORT DELETE START */
460Sstevel@tonic-gate /*
470Sstevel@tonic-gate  * This program implements the
480Sstevel@tonic-gate  * Proposed Federal Information Processing
490Sstevel@tonic-gate  *  Data Encryption Standard.
500Sstevel@tonic-gate  * See Federal Register, March 17, 1975 (40FR12134)
510Sstevel@tonic-gate  */
520Sstevel@tonic-gate 
530Sstevel@tonic-gate /*
540Sstevel@tonic-gate  * Initial permutation,
550Sstevel@tonic-gate  */
560Sstevel@tonic-gate static char IP[] = {
570Sstevel@tonic-gate 	58, 50, 42, 34, 26, 18, 10, 2,
580Sstevel@tonic-gate 	60, 52, 44, 36, 28, 20, 12, 4,
590Sstevel@tonic-gate 	62, 54, 46, 38, 30, 22, 14, 6,
600Sstevel@tonic-gate 	64, 56, 48, 40, 32, 24, 16, 8,
610Sstevel@tonic-gate 	57, 49, 41, 33, 25, 17, 9, 1,
620Sstevel@tonic-gate 	59, 51, 43, 35, 27, 19, 11, 3,
630Sstevel@tonic-gate 	61, 53, 45, 37, 29, 21, 13, 5,
640Sstevel@tonic-gate 	63, 55, 47, 39, 31, 23, 15, 7,
650Sstevel@tonic-gate };
660Sstevel@tonic-gate 
670Sstevel@tonic-gate /*
680Sstevel@tonic-gate  * Final permutation, FP = IP^(-1)
690Sstevel@tonic-gate  */
700Sstevel@tonic-gate static char FP[] = {
710Sstevel@tonic-gate 	40, 8, 48, 16, 56, 24, 64, 32,
720Sstevel@tonic-gate 	39, 7, 47, 15, 55, 23, 63, 31,
730Sstevel@tonic-gate 	38, 6, 46, 14, 54, 22, 62, 30,
740Sstevel@tonic-gate 	37, 5, 45, 13, 53, 21, 61, 29,
750Sstevel@tonic-gate 	36, 4, 44, 12, 52, 20, 60, 28,
760Sstevel@tonic-gate 	35, 3, 43, 11, 51, 19, 59, 27,
770Sstevel@tonic-gate 	34, 2, 42, 10, 50, 18, 58, 26,
780Sstevel@tonic-gate 	33, 1, 41, 9, 49, 17, 57, 25,
790Sstevel@tonic-gate };
800Sstevel@tonic-gate 
810Sstevel@tonic-gate /*
820Sstevel@tonic-gate  * Permuted-choice 1 from the key bits
830Sstevel@tonic-gate  * to yield C and D.
840Sstevel@tonic-gate  * Note that bits 8, 16... are left out:
850Sstevel@tonic-gate  * They are intended for a parity check.
860Sstevel@tonic-gate  */
870Sstevel@tonic-gate static char PC1_C[] = {
880Sstevel@tonic-gate 	57, 49, 41, 33, 25, 17, 9,
890Sstevel@tonic-gate 	1, 58, 50, 42, 34, 26, 18,
900Sstevel@tonic-gate 	10, 2, 59, 51, 43, 35, 27,
910Sstevel@tonic-gate 	19, 11, 3, 60, 52, 44, 36,
920Sstevel@tonic-gate };
930Sstevel@tonic-gate 
940Sstevel@tonic-gate static char PC1_D[] = {
950Sstevel@tonic-gate 	63, 55, 47, 39, 31, 23, 15,
960Sstevel@tonic-gate 	7, 62, 54, 46, 38, 30, 22,
970Sstevel@tonic-gate 	14, 6, 61, 53, 45, 37, 29,
980Sstevel@tonic-gate 	21, 13, 5, 28, 20, 12, 4,
990Sstevel@tonic-gate };
1000Sstevel@tonic-gate 
1010Sstevel@tonic-gate /*
1020Sstevel@tonic-gate  * Sequence of shifts used for the key schedule.
1030Sstevel@tonic-gate  */
1040Sstevel@tonic-gate static char shifts[] = {1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1, };
1050Sstevel@tonic-gate 
1060Sstevel@tonic-gate /*
1070Sstevel@tonic-gate  * Permuted-choice 2, to pick out the bits from
1080Sstevel@tonic-gate  * the CD array that generate the key schedule.
1090Sstevel@tonic-gate  */
1100Sstevel@tonic-gate static char PC2_C[] = {
1110Sstevel@tonic-gate 	14, 17, 11, 24, 1, 5,
1120Sstevel@tonic-gate 	3, 28, 15, 6, 21, 10,
1130Sstevel@tonic-gate 	23, 19, 12, 4, 26, 8,
1140Sstevel@tonic-gate 	16, 7, 27, 20, 13, 2,
1150Sstevel@tonic-gate };
1160Sstevel@tonic-gate 
1170Sstevel@tonic-gate static char PC2_D[] = {
1180Sstevel@tonic-gate 	41, 52, 31, 37, 47, 55,
1190Sstevel@tonic-gate 	30, 40, 51, 45, 33, 48,
1200Sstevel@tonic-gate 	44, 49, 39, 56, 34, 53,
1210Sstevel@tonic-gate 	46, 42, 50, 36, 29, 32,
1220Sstevel@tonic-gate };
1230Sstevel@tonic-gate 
1240Sstevel@tonic-gate /*
1250Sstevel@tonic-gate  * The C and D arrays used to calculate the key schedule.
1260Sstevel@tonic-gate  */
1270Sstevel@tonic-gate 
1280Sstevel@tonic-gate static char C[28];
1290Sstevel@tonic-gate static char D[28];
1300Sstevel@tonic-gate /*
1310Sstevel@tonic-gate  * The key schedule.
1320Sstevel@tonic-gate  * Generated from the key.
1330Sstevel@tonic-gate  */
1340Sstevel@tonic-gate static char KS[16][48];
1350Sstevel@tonic-gate 
1360Sstevel@tonic-gate /*
1370Sstevel@tonic-gate  * The E bit-selection table.
1380Sstevel@tonic-gate  */
1390Sstevel@tonic-gate static char E[48];
1400Sstevel@tonic-gate static char e2[] = {
1410Sstevel@tonic-gate 	32, 1, 2, 3, 4, 5,
1420Sstevel@tonic-gate 	4, 5, 6, 7, 8, 9,
1430Sstevel@tonic-gate 	8, 9, 10, 11, 12, 13,
1440Sstevel@tonic-gate 	12, 13, 14, 15, 16, 17,
1450Sstevel@tonic-gate 	16, 17, 18, 19, 20, 21,
1460Sstevel@tonic-gate 	20, 21, 22, 23, 24, 25,
1470Sstevel@tonic-gate 	24, 25, 26, 27, 28, 29,
1480Sstevel@tonic-gate 	28, 29, 30, 31, 32, 1,
1490Sstevel@tonic-gate };
1500Sstevel@tonic-gate 
1510Sstevel@tonic-gate /*
1520Sstevel@tonic-gate  * Set up the key schedule from the key.
1530Sstevel@tonic-gate  */
1540Sstevel@tonic-gate 
1550Sstevel@tonic-gate static mutex_t lock = DEFAULTMUTEX;
1560Sstevel@tonic-gate 
1570Sstevel@tonic-gate /* EXPORT DELETE END */
1580Sstevel@tonic-gate 
1590Sstevel@tonic-gate 
1600Sstevel@tonic-gate static void
des_setkey_nolock(const char * key)1610Sstevel@tonic-gate des_setkey_nolock(const char *key)
1620Sstevel@tonic-gate {
1630Sstevel@tonic-gate /* EXPORT DELETE START */
1640Sstevel@tonic-gate 	int i, j, k;
1650Sstevel@tonic-gate 	char t;
1660Sstevel@tonic-gate 
1670Sstevel@tonic-gate 	/*
1680Sstevel@tonic-gate 	 * First, generate C and D by permuting
1690Sstevel@tonic-gate 	 * the key.  The low order bit of each
1700Sstevel@tonic-gate 	 * 8-bit char is not used, so C and D are only 28
1710Sstevel@tonic-gate 	 * bits apiece.
1720Sstevel@tonic-gate 	 */
1730Sstevel@tonic-gate 	for (i = 0; i < 28; i++) {
1740Sstevel@tonic-gate 		C[i] = key[PC1_C[i]-1];
1750Sstevel@tonic-gate 		D[i] = key[PC1_D[i]-1];
1760Sstevel@tonic-gate 	}
1770Sstevel@tonic-gate 	/*
1780Sstevel@tonic-gate 	 * To generate Ki, rotate C and D according
1790Sstevel@tonic-gate 	 * to schedule and pick up a permutation
1800Sstevel@tonic-gate 	 * using PC2.
1810Sstevel@tonic-gate 	 */
1820Sstevel@tonic-gate 	for (i = 0; i < 16; i++) {
1830Sstevel@tonic-gate 		/*
1840Sstevel@tonic-gate 		 * rotate.
1850Sstevel@tonic-gate 		 */
1860Sstevel@tonic-gate 		for (k = 0; k < shifts[i]; k++) {
1870Sstevel@tonic-gate 			t = C[0];
1880Sstevel@tonic-gate 			for (j = 0; j < 28-1; j++)
1890Sstevel@tonic-gate 				C[j] = C[j+1];
1900Sstevel@tonic-gate 			C[27] = (char)t;
1910Sstevel@tonic-gate 			t = D[0];
1920Sstevel@tonic-gate 			for (j = 0; j < 28-1; j++)
1930Sstevel@tonic-gate 				D[j] = D[j+1];
1940Sstevel@tonic-gate 			D[27] = (char)t;
1950Sstevel@tonic-gate 		}
1960Sstevel@tonic-gate 		/*
1970Sstevel@tonic-gate 		 * get Ki. Note C and D are concatenated.
1980Sstevel@tonic-gate 		 */
1990Sstevel@tonic-gate 		for (j = 0; j < 24; j++) {
2000Sstevel@tonic-gate 			KS[i][j] = C[PC2_C[j]-1];
2010Sstevel@tonic-gate 			KS[i][j+24] = D[PC2_D[j]-28-1];
2020Sstevel@tonic-gate 		}
2030Sstevel@tonic-gate 	}
2040Sstevel@tonic-gate 
2050Sstevel@tonic-gate 	for (i = 0; i < 48; i++)
2060Sstevel@tonic-gate 		E[i] = e2[i];
2070Sstevel@tonic-gate /* EXPORT DELETE END */
2080Sstevel@tonic-gate }
2090Sstevel@tonic-gate 
2100Sstevel@tonic-gate void
des_setkey(const char * key)2110Sstevel@tonic-gate des_setkey(const char *key)
2120Sstevel@tonic-gate {
2130Sstevel@tonic-gate /* EXPORT DELETE START */
2140Sstevel@tonic-gate 	(void) mutex_lock(&lock);
2150Sstevel@tonic-gate 	des_setkey_nolock(key);
2160Sstevel@tonic-gate 	(void) mutex_unlock(&lock);
2170Sstevel@tonic-gate /* EXPORT DELETE END */
2180Sstevel@tonic-gate }
2190Sstevel@tonic-gate 
2200Sstevel@tonic-gate /* EXPORT DELETE START */
2210Sstevel@tonic-gate /*
2220Sstevel@tonic-gate  * The 8 selection functions.
2230Sstevel@tonic-gate  * For some reason, they give a 0-origin
2240Sstevel@tonic-gate  * index, unlike everything else.
2250Sstevel@tonic-gate  */
2260Sstevel@tonic-gate static char S[8][64] = {
2270Sstevel@tonic-gate 	14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
2280Sstevel@tonic-gate 	0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
2290Sstevel@tonic-gate 	4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
2300Sstevel@tonic-gate 	15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13,
2310Sstevel@tonic-gate 
2320Sstevel@tonic-gate 	15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
2330Sstevel@tonic-gate 	3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
2340Sstevel@tonic-gate 	0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
2350Sstevel@tonic-gate 	13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9,
2360Sstevel@tonic-gate 
2370Sstevel@tonic-gate 	10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
2380Sstevel@tonic-gate 	13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
2390Sstevel@tonic-gate 	13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
2400Sstevel@tonic-gate 	1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12,
2410Sstevel@tonic-gate 
2420Sstevel@tonic-gate 	7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
2430Sstevel@tonic-gate 	13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
2440Sstevel@tonic-gate 	10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
2450Sstevel@tonic-gate 	3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14,
2460Sstevel@tonic-gate 
2470Sstevel@tonic-gate 	2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
2480Sstevel@tonic-gate 	14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
2490Sstevel@tonic-gate 	4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
2500Sstevel@tonic-gate 	11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3,
2510Sstevel@tonic-gate 
2520Sstevel@tonic-gate 	12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
2530Sstevel@tonic-gate 	10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
2540Sstevel@tonic-gate 	9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
2550Sstevel@tonic-gate 	4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13,
2560Sstevel@tonic-gate 
2570Sstevel@tonic-gate 	4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
2580Sstevel@tonic-gate 	13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
2590Sstevel@tonic-gate 	1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
2600Sstevel@tonic-gate 	6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12,
2610Sstevel@tonic-gate 
2620Sstevel@tonic-gate 	13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
2630Sstevel@tonic-gate 	1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
2640Sstevel@tonic-gate 	7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
2650Sstevel@tonic-gate 	2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11,
2660Sstevel@tonic-gate };
2670Sstevel@tonic-gate 
2680Sstevel@tonic-gate /*
2690Sstevel@tonic-gate  * P is a permutation on the selected combination
2700Sstevel@tonic-gate  * of the current L and key.
2710Sstevel@tonic-gate  */
2720Sstevel@tonic-gate static char P[] = {
2730Sstevel@tonic-gate 	16, 7, 20, 21,
2740Sstevel@tonic-gate 	29, 12, 28, 17,
2750Sstevel@tonic-gate 	1, 15, 23, 26,
2760Sstevel@tonic-gate 	5, 18, 31, 10,
2770Sstevel@tonic-gate 	2, 8, 24, 14,
2780Sstevel@tonic-gate 	32, 27, 3, 9,
2790Sstevel@tonic-gate 	19, 13, 30, 6,
2800Sstevel@tonic-gate 	22, 11, 4, 25,
2810Sstevel@tonic-gate };
2820Sstevel@tonic-gate 
2830Sstevel@tonic-gate /*
2840Sstevel@tonic-gate  * The current block, divided into 2 halves.
2850Sstevel@tonic-gate  */
2860Sstevel@tonic-gate static char L[64];
2870Sstevel@tonic-gate static char tempL[32];
2880Sstevel@tonic-gate static char f[32];
2890Sstevel@tonic-gate 
2900Sstevel@tonic-gate /*
2910Sstevel@tonic-gate  * The combination of the key and the input, before selection.
2920Sstevel@tonic-gate  */
2930Sstevel@tonic-gate static char preS[48];
2940Sstevel@tonic-gate 
2950Sstevel@tonic-gate /*
2960Sstevel@tonic-gate  * The payoff: encrypt a block.
2970Sstevel@tonic-gate  */
2980Sstevel@tonic-gate /* EXPORT DELETE END */
2990Sstevel@tonic-gate 
3000Sstevel@tonic-gate static void
des_encrypt_nolock(char * block,int edflag)3010Sstevel@tonic-gate des_encrypt_nolock(char *block, int edflag)
3020Sstevel@tonic-gate {
3030Sstevel@tonic-gate /* EXPORT DELETE START */
3040Sstevel@tonic-gate 
3050Sstevel@tonic-gate 	if (edflag)
306*6812Sraf 		(void) _des_decrypt1(block, L, IP, &L[32],
3070Sstevel@tonic-gate 		    preS, E, KS, S, f, tempL, P, FP);
3080Sstevel@tonic-gate 	else
3090Sstevel@tonic-gate 		(void) des_encrypt1(block, L, IP, &L[32],
3100Sstevel@tonic-gate 		    preS, E, KS, S, f, tempL, P, FP);
3110Sstevel@tonic-gate 
3120Sstevel@tonic-gate /* EXPORT DELETE END */
3130Sstevel@tonic-gate }
3140Sstevel@tonic-gate 
3150Sstevel@tonic-gate void
des_encrypt(char * block,int edflag)3160Sstevel@tonic-gate des_encrypt(char *block, int edflag)
3170Sstevel@tonic-gate {
3180Sstevel@tonic-gate /* EXPORT DELETE START */
3190Sstevel@tonic-gate 	(void) mutex_lock(&lock);
3200Sstevel@tonic-gate 	des_encrypt_nolock(block, edflag);
3210Sstevel@tonic-gate 	(void) mutex_unlock(&lock);
3220Sstevel@tonic-gate /* EXPORT DELETE END */
3230Sstevel@tonic-gate }
3240Sstevel@tonic-gate 
3250Sstevel@tonic-gate 
3260Sstevel@tonic-gate 
3270Sstevel@tonic-gate #define	IOBUF_SIZE	16
3280Sstevel@tonic-gate 
3290Sstevel@tonic-gate static char *
_get_iobuf(thread_key_t * keyp,unsigned size)3303864Sraf _get_iobuf(thread_key_t *keyp, unsigned size)
3310Sstevel@tonic-gate {
3323864Sraf 	char *iobuf;
3330Sstevel@tonic-gate 
3343864Sraf 	if (thr_keycreate_once(keyp, free) != 0)
3353864Sraf 		return (NULL);
3363864Sraf 	iobuf = pthread_getspecific(*keyp);
3373864Sraf 	if (iobuf == NULL) {
3383864Sraf 		if (thr_setspecific(*keyp, (iobuf = malloc(size))) != 0) {
3390Sstevel@tonic-gate 			if (iobuf)
3400Sstevel@tonic-gate 				(void) free(iobuf);
3413864Sraf 			iobuf = NULL;
3420Sstevel@tonic-gate 		}
3430Sstevel@tonic-gate 	}
3440Sstevel@tonic-gate 	return (iobuf);
3450Sstevel@tonic-gate }
3460Sstevel@tonic-gate 
3470Sstevel@tonic-gate char *
des_crypt(const char * pw,const char * salt)3480Sstevel@tonic-gate des_crypt(const char *pw, const char *salt)
3490Sstevel@tonic-gate {
3500Sstevel@tonic-gate /* EXPORT DELETE START */
3510Sstevel@tonic-gate 	int	i, j;
3520Sstevel@tonic-gate 	char	c, temp;
3533864Sraf 	char block[66];
3543864Sraf 	static thread_key_t key = THR_ONCE_KEY;
3553864Sraf 	char *iobuf = _get_iobuf(&key, IOBUF_SIZE);
3560Sstevel@tonic-gate 
3570Sstevel@tonic-gate 	(void) mutex_lock(&lock);
3580Sstevel@tonic-gate 	for (i = 0; i < 66; i++)
3590Sstevel@tonic-gate 		block[i] = 0;
3600Sstevel@tonic-gate 	for (i = 0; (c = *pw) && (i < 64); pw++) {
3610Sstevel@tonic-gate 		for (j = 0; j < 7; j++, i++)
3620Sstevel@tonic-gate 			block[i] = (c>>(6-j)) & 01;
3630Sstevel@tonic-gate 		i++;
3640Sstevel@tonic-gate 	}
3650Sstevel@tonic-gate 
3660Sstevel@tonic-gate 	des_setkey_nolock(block);
3670Sstevel@tonic-gate 
3680Sstevel@tonic-gate 	for (i = 0; i < 66; i++)
3690Sstevel@tonic-gate 		block[i] = 0;
3700Sstevel@tonic-gate 
3710Sstevel@tonic-gate 	for (i = 0; i < 2; i++) {
3720Sstevel@tonic-gate 		c = *salt++;
3730Sstevel@tonic-gate 		iobuf[i] = (char)c;
3740Sstevel@tonic-gate 		if (c > 'Z')
3750Sstevel@tonic-gate 			c -= 6;
3760Sstevel@tonic-gate 		if (c > '9')
3770Sstevel@tonic-gate 			c -= 7;
3780Sstevel@tonic-gate 		c -= '.';
3790Sstevel@tonic-gate 		for (j = 0; j < 6; j++) {
3800Sstevel@tonic-gate 			if ((c>>j) & 01) {
3810Sstevel@tonic-gate 				temp = E[6*i+j];
3820Sstevel@tonic-gate 				E[6*i+j] = E[6*i+j+24];
3830Sstevel@tonic-gate 				E[6*i+j+24] = (char)temp;
3840Sstevel@tonic-gate 			}
3850Sstevel@tonic-gate 		}
3860Sstevel@tonic-gate 	}
3870Sstevel@tonic-gate 
3880Sstevel@tonic-gate 	for (i = 0; i < 25; i++)
3890Sstevel@tonic-gate 		(void) des_encrypt_nolock(block, 0);
3900Sstevel@tonic-gate 
3910Sstevel@tonic-gate 	for (i = 0; i < 11; i++) {
3920Sstevel@tonic-gate 		c = 0;
3930Sstevel@tonic-gate 		for (j = 0; j < 6; j++) {
3940Sstevel@tonic-gate 			c <<= 1;
3950Sstevel@tonic-gate 			c |= block[6*i+j];
3960Sstevel@tonic-gate 		}
3970Sstevel@tonic-gate 		c += '.';
3980Sstevel@tonic-gate 		if (c > '9')
3990Sstevel@tonic-gate 			c += 7;
4000Sstevel@tonic-gate 		if (c > 'Z')
4010Sstevel@tonic-gate 			c += 6;
4020Sstevel@tonic-gate 		iobuf[i+2] = (char)c;
4030Sstevel@tonic-gate 	}
4040Sstevel@tonic-gate 	iobuf[i+2] = 0;
4050Sstevel@tonic-gate 	if (iobuf[1] == 0)
4060Sstevel@tonic-gate 		iobuf[1] = iobuf[0];
4070Sstevel@tonic-gate 	(void) mutex_unlock(&lock);
4080Sstevel@tonic-gate 	return (iobuf);
4090Sstevel@tonic-gate #if 0
4100Sstevel@tonic-gate /* EXPORT DELETE END */
4110Sstevel@tonic-gate 	return (0);
4120Sstevel@tonic-gate /* EXPORT DELETE START */
4130Sstevel@tonic-gate #endif
4140Sstevel@tonic-gate /* EXPORT DELETE END */
4150Sstevel@tonic-gate }
416