001: /*
002: * JOSSO: Java Open Single Sign-On
003: *
004: * Copyright 2004-2008, Atricore, Inc.
005: *
006: * This is free software; you can redistribute it and/or modify it
007: * under the terms of the GNU Lesser General Public License as
008: * published by the Free Software Foundation; either version 2.1 of
009: * the License, or (at your option) any later version.
010: *
011: * This software is distributed in the hope that it will be useful,
012: * but WITHOUT ANY WARRANTY; without even the implied warranty of
013: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014: * Lesser General Public License for more details.
015: *
016: * You should have received a copy of the GNU Lesser General Public
017: * License along with this software; if not, write to the Free
018: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
019: * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
020: */
021: package org.josso.auth.util;
022:
023: /****************************************************************************
024: * Java-based implementation of the unix crypt(3) command
025: *
026: * Based upon C source code written by Eric Young, eay@psych.uq.oz.au
027: * Java conversion by John F. Dumas, jdumas@zgs.com
028: *
029: * Found at http://locutus.kingwoodcable.com/jfd/crypt.html
030: * Minor optimizations by Wes Biggs, wes@cacas.org
031: *
032: * Eric's original code is licensed under the BSD license. As this is
033: * derivative, the same license applies.
034: *
035: * Note: Crypt.class is much smaller when compiled with javac -O
036: ****************************************************************************/
037:
038: public class Crypt {
039: private Crypt() {
040: } // defined so class can't be instantiated.
041:
042: private static final int ITERATIONS = 16;
043:
044: private static final boolean shifts2[] = { false, false, true,
045: true, true, true, true, true, false, true, true, true,
046: true, true, true, false };
047:
048: private static final int skb[][] = {
049: {
050: /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
051: 0x00000000, 0x00000010, 0x20000000, 0x20000010, 0x00010000,
052: 0x00010010, 0x20010000, 0x20010010, 0x00000800,
053: 0x00000810, 0x20000800, 0x20000810, 0x00010800,
054: 0x00010810, 0x20010800, 0x20010810, 0x00000020,
055: 0x00000030, 0x20000020, 0x20000030, 0x00010020,
056: 0x00010030, 0x20010020, 0x20010030, 0x00000820,
057: 0x00000830, 0x20000820, 0x20000830, 0x00010820,
058: 0x00010830, 0x20010820, 0x20010830, 0x00080000,
059: 0x00080010, 0x20080000, 0x20080010, 0x00090000,
060: 0x00090010, 0x20090000, 0x20090010, 0x00080800,
061: 0x00080810, 0x20080800, 0x20080810, 0x00090800,
062: 0x00090810, 0x20090800, 0x20090810, 0x00080020,
063: 0x00080030, 0x20080020, 0x20080030, 0x00090020,
064: 0x00090030, 0x20090020, 0x20090030, 0x00080820,
065: 0x00080830, 0x20080820, 0x20080830, 0x00090820,
066: 0x00090830, 0x20090820, 0x20090830, },
067: {
068: /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
069: 0x00000000, 0x02000000, 0x00002000, 0x02002000, 0x00200000,
070: 0x02200000, 0x00202000, 0x02202000, 0x00000004,
071: 0x02000004, 0x00002004, 0x02002004, 0x00200004,
072: 0x02200004, 0x00202004, 0x02202004, 0x00000400,
073: 0x02000400, 0x00002400, 0x02002400, 0x00200400,
074: 0x02200400, 0x00202400, 0x02202400, 0x00000404,
075: 0x02000404, 0x00002404, 0x02002404, 0x00200404,
076: 0x02200404, 0x00202404, 0x02202404, 0x10000000,
077: 0x12000000, 0x10002000, 0x12002000, 0x10200000,
078: 0x12200000, 0x10202000, 0x12202000, 0x10000004,
079: 0x12000004, 0x10002004, 0x12002004, 0x10200004,
080: 0x12200004, 0x10202004, 0x12202004, 0x10000400,
081: 0x12000400, 0x10002400, 0x12002400, 0x10200400,
082: 0x12200400, 0x10202400, 0x12202400, 0x10000404,
083: 0x12000404, 0x10002404, 0x12002404, 0x10200404,
084: 0x12200404, 0x10202404, 0x12202404, },
085: {
086: /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
087: 0x00000000, 0x00000001, 0x00040000, 0x00040001, 0x01000000,
088: 0x01000001, 0x01040000, 0x01040001, 0x00000002,
089: 0x00000003, 0x00040002, 0x00040003, 0x01000002,
090: 0x01000003, 0x01040002, 0x01040003, 0x00000200,
091: 0x00000201, 0x00040200, 0x00040201, 0x01000200,
092: 0x01000201, 0x01040200, 0x01040201, 0x00000202,
093: 0x00000203, 0x00040202, 0x00040203, 0x01000202,
094: 0x01000203, 0x01040202, 0x01040203, 0x08000000,
095: 0x08000001, 0x08040000, 0x08040001, 0x09000000,
096: 0x09000001, 0x09040000, 0x09040001, 0x08000002,
097: 0x08000003, 0x08040002, 0x08040003, 0x09000002,
098: 0x09000003, 0x09040002, 0x09040003, 0x08000200,
099: 0x08000201, 0x08040200, 0x08040201, 0x09000200,
100: 0x09000201, 0x09040200, 0x09040201, 0x08000202,
101: 0x08000203, 0x08040202, 0x08040203, 0x09000202,
102: 0x09000203, 0x09040202, 0x09040203, },
103: {
104: /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
105: 0x00000000, 0x00100000, 0x00000100, 0x00100100, 0x00000008,
106: 0x00100008, 0x00000108, 0x00100108, 0x00001000,
107: 0x00101000, 0x00001100, 0x00101100, 0x00001008,
108: 0x00101008, 0x00001108, 0x00101108, 0x04000000,
109: 0x04100000, 0x04000100, 0x04100100, 0x04000008,
110: 0x04100008, 0x04000108, 0x04100108, 0x04001000,
111: 0x04101000, 0x04001100, 0x04101100, 0x04001008,
112: 0x04101008, 0x04001108, 0x04101108, 0x00020000,
113: 0x00120000, 0x00020100, 0x00120100, 0x00020008,
114: 0x00120008, 0x00020108, 0x00120108, 0x00021000,
115: 0x00121000, 0x00021100, 0x00121100, 0x00021008,
116: 0x00121008, 0x00021108, 0x00121108, 0x04020000,
117: 0x04120000, 0x04020100, 0x04120100, 0x04020008,
118: 0x04120008, 0x04020108, 0x04120108, 0x04021000,
119: 0x04121000, 0x04021100, 0x04121100, 0x04021008,
120: 0x04121008, 0x04021108, 0x04121108, },
121: {
122: /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
123: 0x00000000, 0x10000000, 0x00010000, 0x10010000, 0x00000004,
124: 0x10000004, 0x00010004, 0x10010004, 0x20000000,
125: 0x30000000, 0x20010000, 0x30010000, 0x20000004,
126: 0x30000004, 0x20010004, 0x30010004, 0x00100000,
127: 0x10100000, 0x00110000, 0x10110000, 0x00100004,
128: 0x10100004, 0x00110004, 0x10110004, 0x20100000,
129: 0x30100000, 0x20110000, 0x30110000, 0x20100004,
130: 0x30100004, 0x20110004, 0x30110004, 0x00001000,
131: 0x10001000, 0x00011000, 0x10011000, 0x00001004,
132: 0x10001004, 0x00011004, 0x10011004, 0x20001000,
133: 0x30001000, 0x20011000, 0x30011000, 0x20001004,
134: 0x30001004, 0x20011004, 0x30011004, 0x00101000,
135: 0x10101000, 0x00111000, 0x10111000, 0x00101004,
136: 0x10101004, 0x00111004, 0x10111004, 0x20101000,
137: 0x30101000, 0x20111000, 0x30111000, 0x20101004,
138: 0x30101004, 0x20111004, 0x30111004, },
139: {
140: /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
141: 0x00000000, 0x08000000, 0x00000008, 0x08000008, 0x00000400,
142: 0x08000400, 0x00000408, 0x08000408, 0x00020000,
143: 0x08020000, 0x00020008, 0x08020008, 0x00020400,
144: 0x08020400, 0x00020408, 0x08020408, 0x00000001,
145: 0x08000001, 0x00000009, 0x08000009, 0x00000401,
146: 0x08000401, 0x00000409, 0x08000409, 0x00020001,
147: 0x08020001, 0x00020009, 0x08020009, 0x00020401,
148: 0x08020401, 0x00020409, 0x08020409, 0x02000000,
149: 0x0A000000, 0x02000008, 0x0A000008, 0x02000400,
150: 0x0A000400, 0x02000408, 0x0A000408, 0x02020000,
151: 0x0A020000, 0x02020008, 0x0A020008, 0x02020400,
152: 0x0A020400, 0x02020408, 0x0A020408, 0x02000001,
153: 0x0A000001, 0x02000009, 0x0A000009, 0x02000401,
154: 0x0A000401, 0x02000409, 0x0A000409, 0x02020001,
155: 0x0A020001, 0x02020009, 0x0A020009, 0x02020401,
156: 0x0A020401, 0x02020409, 0x0A020409, },
157: {
158: /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
159: 0x00000000, 0x00000100, 0x00080000, 0x00080100, 0x01000000,
160: 0x01000100, 0x01080000, 0x01080100, 0x00000010,
161: 0x00000110, 0x00080010, 0x00080110, 0x01000010,
162: 0x01000110, 0x01080010, 0x01080110, 0x00200000,
163: 0x00200100, 0x00280000, 0x00280100, 0x01200000,
164: 0x01200100, 0x01280000, 0x01280100, 0x00200010,
165: 0x00200110, 0x00280010, 0x00280110, 0x01200010,
166: 0x01200110, 0x01280010, 0x01280110, 0x00000200,
167: 0x00000300, 0x00080200, 0x00080300, 0x01000200,
168: 0x01000300, 0x01080200, 0x01080300, 0x00000210,
169: 0x00000310, 0x00080210, 0x00080310, 0x01000210,
170: 0x01000310, 0x01080210, 0x01080310, 0x00200200,
171: 0x00200300, 0x00280200, 0x00280300, 0x01200200,
172: 0x01200300, 0x01280200, 0x01280300, 0x00200210,
173: 0x00200310, 0x00280210, 0x00280310, 0x01200210,
174: 0x01200310, 0x01280210, 0x01280310, },
175: {
176: /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
177: 0x00000000, 0x04000000, 0x00040000, 0x04040000, 0x00000002,
178: 0x04000002, 0x00040002, 0x04040002, 0x00002000,
179: 0x04002000, 0x00042000, 0x04042000, 0x00002002,
180: 0x04002002, 0x00042002, 0x04042002, 0x00000020,
181: 0x04000020, 0x00040020, 0x04040020, 0x00000022,
182: 0x04000022, 0x00040022, 0x04040022, 0x00002020,
183: 0x04002020, 0x00042020, 0x04042020, 0x00002022,
184: 0x04002022, 0x00042022, 0x04042022, 0x00000800,
185: 0x04000800, 0x00040800, 0x04040800, 0x00000802,
186: 0x04000802, 0x00040802, 0x04040802, 0x00002800,
187: 0x04002800, 0x00042800, 0x04042800, 0x00002802,
188: 0x04002802, 0x00042802, 0x04042802, 0x00000820,
189: 0x04000820, 0x00040820, 0x04040820, 0x00000822,
190: 0x04000822, 0x00040822, 0x04040822, 0x00002820,
191: 0x04002820, 0x00042820, 0x04042820, 0x00002822,
192: 0x04002822, 0x00042822, 0x04042822, } };
193:
194: private static final int SPtrans[][] = {
195: {
196: /* nibble 0 */
197: 0x00820200, 0x00020000, 0x80800000, 0x80820200, 0x00800000,
198: 0x80020200, 0x80020000, 0x80800000, 0x80020200,
199: 0x00820200, 0x00820000, 0x80000200, 0x80800200,
200: 0x00800000, 0x00000000, 0x80020000, 0x00020000,
201: 0x80000000, 0x00800200, 0x00020200, 0x80820200,
202: 0x00820000, 0x80000200, 0x00800200, 0x80000000,
203: 0x00000200, 0x00020200, 0x80820000, 0x00000200,
204: 0x80800200, 0x80820000, 0x00000000, 0x00000000,
205: 0x80820200, 0x00800200, 0x80020000, 0x00820200,
206: 0x00020000, 0x80000200, 0x00800200, 0x80820000,
207: 0x00000200, 0x00020200, 0x80800000, 0x80020200,
208: 0x80000000, 0x80800000, 0x00820000, 0x80820200,
209: 0x00020200, 0x00820000, 0x80800200, 0x00800000,
210: 0x80000200, 0x80020000, 0x00000000, 0x00020000,
211: 0x00800000, 0x80800200, 0x00820200, 0x80000000,
212: 0x80820000, 0x00000200, 0x80020200, },
213: {
214: /* nibble 1 */
215: 0x10042004, 0x00000000, 0x00042000, 0x10040000, 0x10000004,
216: 0x00002004, 0x10002000, 0x00042000, 0x00002000,
217: 0x10040004, 0x00000004, 0x10002000, 0x00040004,
218: 0x10042000, 0x10040000, 0x00000004, 0x00040000,
219: 0x10002004, 0x10040004, 0x00002000, 0x00042004,
220: 0x10000000, 0x00000000, 0x00040004, 0x10002004,
221: 0x00042004, 0x10042000, 0x10000004, 0x10000000,
222: 0x00040000, 0x00002004, 0x10042004, 0x00040004,
223: 0x10042000, 0x10002000, 0x00042004, 0x10042004,
224: 0x00040004, 0x10000004, 0x00000000, 0x10000000,
225: 0x00002004, 0x00040000, 0x10040004, 0x00002000,
226: 0x10000000, 0x00042004, 0x10002004, 0x10042000,
227: 0x00002000, 0x00000000, 0x10000004, 0x00000004,
228: 0x10042004, 0x00042000, 0x10040000, 0x10040004,
229: 0x00040000, 0x00002004, 0x10002000, 0x10002004,
230: 0x00000004, 0x10040000, 0x00042000, },
231: {
232: /* nibble 2 */
233: 0x41000000, 0x01010040, 0x00000040, 0x41000040, 0x40010000,
234: 0x01000000, 0x41000040, 0x00010040, 0x01000040,
235: 0x00010000, 0x01010000, 0x40000000, 0x41010040,
236: 0x40000040, 0x40000000, 0x41010000, 0x00000000,
237: 0x40010000, 0x01010040, 0x00000040, 0x40000040,
238: 0x41010040, 0x00010000, 0x41000000, 0x41010000,
239: 0x01000040, 0x40010040, 0x01010000, 0x00010040,
240: 0x00000000, 0x01000000, 0x40010040, 0x01010040,
241: 0x00000040, 0x40000000, 0x00010000, 0x40000040,
242: 0x40010000, 0x01010000, 0x41000040, 0x00000000,
243: 0x01010040, 0x00010040, 0x41010000, 0x40010000,
244: 0x01000000, 0x41010040, 0x40000000, 0x40010040,
245: 0x41000000, 0x01000000, 0x41010040, 0x00010000,
246: 0x01000040, 0x41000040, 0x00010040, 0x01000040,
247: 0x00000000, 0x41010000, 0x40000040, 0x41000000,
248: 0x40010040, 0x00000040, 0x01010000, },
249: {
250: /* nibble 3 */
251: 0x00100402, 0x04000400, 0x00000002, 0x04100402, 0x00000000,
252: 0x04100000, 0x04000402, 0x00100002, 0x04100400,
253: 0x04000002, 0x04000000, 0x00000402, 0x04000002,
254: 0x00100402, 0x00100000, 0x04000000, 0x04100002,
255: 0x00100400, 0x00000400, 0x00000002, 0x00100400,
256: 0x04000402, 0x04100000, 0x00000400, 0x00000402,
257: 0x00000000, 0x00100002, 0x04100400, 0x04000400,
258: 0x04100002, 0x04100402, 0x00100000, 0x04100002,
259: 0x00000402, 0x00100000, 0x04000002, 0x00100400,
260: 0x04000400, 0x00000002, 0x04100000, 0x04000402,
261: 0x00000000, 0x00000400, 0x00100002, 0x00000000,
262: 0x04100002, 0x04100400, 0x00000400, 0x04000000,
263: 0x04100402, 0x00100402, 0x00100000, 0x04100402,
264: 0x00000002, 0x04000400, 0x00100402, 0x00100002,
265: 0x00100400, 0x04100000, 0x04000402, 0x00000402,
266: 0x04000000, 0x04000002, 0x04100400, },
267: {
268: /* nibble 4 */
269: 0x02000000, 0x00004000, 0x00000100, 0x02004108, 0x02004008,
270: 0x02000100, 0x00004108, 0x02004000, 0x00004000,
271: 0x00000008, 0x02000008, 0x00004100, 0x02000108,
272: 0x02004008, 0x02004100, 0x00000000, 0x00004100,
273: 0x02000000, 0x00004008, 0x00000108, 0x02000100,
274: 0x00004108, 0x00000000, 0x02000008, 0x00000008,
275: 0x02000108, 0x02004108, 0x00004008, 0x02004000,
276: 0x00000100, 0x00000108, 0x02004100, 0x02004100,
277: 0x02000108, 0x00004008, 0x02004000, 0x00004000,
278: 0x00000008, 0x02000008, 0x02000100, 0x02000000,
279: 0x00004100, 0x02004108, 0x00000000, 0x00004108,
280: 0x02000000, 0x00000100, 0x00004008, 0x02000108,
281: 0x00000100, 0x00000000, 0x02004108, 0x02004008,
282: 0x02004100, 0x00000108, 0x00004000, 0x00004100,
283: 0x02004008, 0x02000100, 0x00000108, 0x00000008,
284: 0x00004108, 0x02004000, 0x02000008, },
285: {
286: /* nibble 5 */
287: 0x20000010, 0x00080010, 0x00000000, 0x20080800, 0x00080010,
288: 0x00000800, 0x20000810, 0x00080000, 0x00000810,
289: 0x20080810, 0x00080800, 0x20000000, 0x20000800,
290: 0x20000010, 0x20080000, 0x00080810, 0x00080000,
291: 0x20000810, 0x20080010, 0x00000000, 0x00000800,
292: 0x00000010, 0x20080800, 0x20080010, 0x20080810,
293: 0x20080000, 0x20000000, 0x00000810, 0x00000010,
294: 0x00080800, 0x00080810, 0x20000800, 0x00000810,
295: 0x20000000, 0x20000800, 0x00080810, 0x20080800,
296: 0x00080010, 0x00000000, 0x20000800, 0x20000000,
297: 0x00000800, 0x20080010, 0x00080000, 0x00080010,
298: 0x20080810, 0x00080800, 0x00000010, 0x20080810,
299: 0x00080800, 0x00080000, 0x20000810, 0x20000010,
300: 0x20080000, 0x00080810, 0x00000000, 0x00000800,
301: 0x20000010, 0x20000810, 0x20080800, 0x20080000,
302: 0x00000810, 0x00000010, 0x20080010, },
303: {
304: /* nibble 6 */
305: 0x00001000, 0x00000080, 0x00400080, 0x00400001, 0x00401081,
306: 0x00001001, 0x00001080, 0x00000000, 0x00400000,
307: 0x00400081, 0x00000081, 0x00401000, 0x00000001,
308: 0x00401080, 0x00401000, 0x00000081, 0x00400081,
309: 0x00001000, 0x00001001, 0x00401081, 0x00000000,
310: 0x00400080, 0x00400001, 0x00001080, 0x00401001,
311: 0x00001081, 0x00401080, 0x00000001, 0x00001081,
312: 0x00401001, 0x00000080, 0x00400000, 0x00001081,
313: 0x00401000, 0x00401001, 0x00000081, 0x00001000,
314: 0x00000080, 0x00400000, 0x00401001, 0x00400081,
315: 0x00001081, 0x00001080, 0x00000000, 0x00000080,
316: 0x00400001, 0x00000001, 0x00400080, 0x00000000,
317: 0x00400081, 0x00400080, 0x00001080, 0x00000081,
318: 0x00001000, 0x00401081, 0x00400000, 0x00401080,
319: 0x00000001, 0x00001001, 0x00401081, 0x00400001,
320: 0x00401080, 0x00401000, 0x00001001, },
321: {
322: /* nibble 7 */
323: 0x08200020, 0x08208000, 0x00008020, 0x00000000, 0x08008000,
324: 0x00200020, 0x08200000, 0x08208020, 0x00000020,
325: 0x08000000, 0x00208000, 0x00008020, 0x00208020,
326: 0x08008020, 0x08000020, 0x08200000, 0x00008000,
327: 0x00208020, 0x00200020, 0x08008000, 0x08208020,
328: 0x08000020, 0x00000000, 0x00208000, 0x08000000,
329: 0x00200000, 0x08008020, 0x08200020, 0x00200000,
330: 0x00008000, 0x08208000, 0x00000020, 0x00200000,
331: 0x00008000, 0x08000020, 0x08208020, 0x00008020,
332: 0x08000000, 0x00000000, 0x00208000, 0x08200020,
333: 0x08008020, 0x08008000, 0x00200020, 0x08208000,
334: 0x00000020, 0x00200020, 0x08008000, 0x08208020,
335: 0x00200000, 0x08200000, 0x08000020, 0x00208000,
336: 0x00008020, 0x08008020, 0x08200000, 0x00000020,
337: 0x08208000, 0x00208020, 0x00000000, 0x08000000,
338: 0x08200020, 0x00008000, 0x00208020 } };
339:
340: private static final int byteToUnsigned(byte b) {
341: int value = (int) b;
342: return (value >= 0) ? value : value + 256;
343: }
344:
345: private static int fourBytesToInt(byte b[], int offset) {
346: return byteToUnsigned(b[offset++])
347: | (byteToUnsigned(b[offset++]) << 8)
348: | (byteToUnsigned(b[offset++]) << 16)
349: | (byteToUnsigned(b[offset]) << 24);
350: }
351:
352: private static final void intToFourBytes(int iValue, byte b[],
353: int offset) {
354: b[offset++] = (byte) ((iValue) & 0xff);
355: b[offset++] = (byte) ((iValue >>> 8) & 0xff);
356: b[offset++] = (byte) ((iValue >>> 16) & 0xff);
357: b[offset] = (byte) ((iValue >>> 24) & 0xff);
358: }
359:
360: private static final void PERM_OP(int a, int b, int n, int m,
361: int results[]) {
362: int t;
363:
364: t = ((a >>> n) ^ b) & m;
365: a ^= t << n;
366: b ^= t;
367:
368: results[0] = a;
369: results[1] = b;
370: }
371:
372: private static final int HPERM_OP(int a, int n, int m) {
373: int t;
374:
375: t = ((a << (16 - n)) ^ a) & m;
376: a = a ^ t ^ (t >>> (16 - n));
377:
378: return a;
379: }
380:
381: private static int[] des_set_key(byte key[]) {
382: int schedule[] = new int[ITERATIONS * 2];
383:
384: int c = fourBytesToInt(key, 0);
385: int d = fourBytesToInt(key, 4);
386:
387: int results[] = new int[2];
388:
389: PERM_OP(d, c, 4, 0x0f0f0f0f, results);
390: d = results[0];
391: c = results[1];
392:
393: c = HPERM_OP(c, -2, 0xcccc0000);
394: d = HPERM_OP(d, -2, 0xcccc0000);
395:
396: PERM_OP(d, c, 1, 0x55555555, results);
397: d = results[0];
398: c = results[1];
399:
400: PERM_OP(c, d, 8, 0x00ff00ff, results);
401: c = results[0];
402: d = results[1];
403:
404: PERM_OP(d, c, 1, 0x55555555, results);
405: d = results[0];
406: c = results[1];
407:
408: d = (((d & 0x000000ff) << 16) | (d & 0x0000ff00)
409: | ((d & 0x00ff0000) >>> 16) | ((c & 0xf0000000) >>> 4));
410: c &= 0x0fffffff;
411:
412: int s, t;
413: int j = 0;
414:
415: for (int i = 0; i < ITERATIONS; i++) {
416: if (shifts2[i]) {
417: c = (c >>> 2) | (c << 26);
418: d = (d >>> 2) | (d << 26);
419: } else {
420: c = (c >>> 1) | (c << 27);
421: d = (d >>> 1) | (d << 27);
422: }
423:
424: c &= 0x0fffffff;
425: d &= 0x0fffffff;
426:
427: s = skb[0][(c) & 0x3f]
428: | skb[1][((c >>> 6) & 0x03) | ((c >>> 7) & 0x3c)]
429: | skb[2][((c >>> 13) & 0x0f) | ((c >>> 14) & 0x30)]
430: | skb[3][((c >>> 20) & 0x01) | ((c >>> 21) & 0x06)
431: | ((c >>> 22) & 0x38)];
432:
433: t = skb[4][(d) & 0x3f]
434: | skb[5][((d >>> 7) & 0x03) | ((d >>> 8) & 0x3c)]
435: | skb[6][(d >>> 15) & 0x3f]
436: | skb[7][((d >>> 21) & 0x0f) | ((d >>> 22) & 0x30)];
437:
438: schedule[j++] = ((t << 16) | (s & 0x0000ffff)) & 0xffffffff;
439: s = ((s >>> 16) | (t & 0xffff0000));
440:
441: s = (s << 4) | (s >>> 28);
442: schedule[j++] = s & 0xffffffff;
443: }
444: return schedule;
445: }
446:
447: private static final int D_ENCRYPT(int L, int R, int S, int E0,
448: int E1, int s[]) {
449: int t, u, v;
450:
451: v = R ^ (R >>> 16);
452: u = v & E0;
453: v = v & E1;
454: u = (u ^ (u << 16)) ^ R ^ s[S];
455: t = (v ^ (v << 16)) ^ R ^ s[S + 1];
456: t = (t >>> 4) | (t << 28);
457:
458: L ^= SPtrans[1][(t) & 0x3f] | SPtrans[3][(t >>> 8) & 0x3f]
459: | SPtrans[5][(t >>> 16) & 0x3f]
460: | SPtrans[7][(t >>> 24) & 0x3f]
461: | SPtrans[0][(u) & 0x3f] | SPtrans[2][(u >>> 8) & 0x3f]
462: | SPtrans[4][(u >>> 16) & 0x3f]
463: | SPtrans[6][(u >>> 24) & 0x3f];
464:
465: return L;
466: }
467:
468: private static final int[] body(int schedule[], int Eswap0,
469: int Eswap1) {
470: int left = 0;
471: int right = 0;
472: int t = 0;
473:
474: for (int j = 0; j < 25; j++) {
475: for (int i = 0; i < ITERATIONS * 2; i += 4) {
476: left = D_ENCRYPT(left, right, i, Eswap0, Eswap1,
477: schedule);
478: right = D_ENCRYPT(right, left, i + 2, Eswap0, Eswap1,
479: schedule);
480: }
481: t = left;
482: left = right;
483: right = t;
484: }
485:
486: t = right;
487:
488: right = (left >>> 1) | (left << 31);
489: left = (t >>> 1) | (t << 31);
490:
491: left &= 0xffffffff;
492: right &= 0xffffffff;
493:
494: int results[] = new int[2];
495:
496: PERM_OP(right, left, 1, 0x55555555, results);
497: right = results[0];
498: left = results[1];
499:
500: PERM_OP(left, right, 8, 0x00ff00ff, results);
501: left = results[0];
502: right = results[1];
503:
504: PERM_OP(right, left, 2, 0x33333333, results);
505: right = results[0];
506: left = results[1];
507:
508: PERM_OP(left, right, 16, 0x0000ffff, results);
509: left = results[0];
510: right = results[1];
511:
512: PERM_OP(right, left, 4, 0x0f0f0f0f, results);
513: right = results[0];
514: left = results[1];
515:
516: int out[] = new int[2];
517:
518: out[0] = left;
519: out[1] = right;
520:
521: return out;
522: }
523:
524: public static final String alphabet = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
525:
526: public static final String crypt(String salt, String original) {
527: // wwb -- Should do some sanity checks: salt needs to be 2 chars, in alpha.
528: while (salt.length() < 2)
529: salt += "A";
530:
531: char[] buffer = new char[13];
532:
533: char charZero = salt.charAt(0);
534: char charOne = salt.charAt(1);
535:
536: buffer[0] = charZero;
537: buffer[1] = charOne;
538:
539: int Eswap0 = alphabet.indexOf(charZero);
540: int Eswap1 = alphabet.indexOf(charOne) << 4;
541: byte key[] = new byte[8];
542:
543: for (int i = 0; i < key.length; i++)
544: key[i] = (byte) 0;
545:
546: for (int i = 0; i < key.length && i < original.length(); i++)
547: key[i] = (byte) (((int) original.charAt(i)) << 1);
548:
549: int schedule[] = des_set_key(key);
550: int out[] = body(schedule, Eswap0, Eswap1);
551:
552: byte b[] = new byte[9];
553:
554: intToFourBytes(out[0], b, 0);
555: intToFourBytes(out[1], b, 4);
556: b[8] = 0;
557:
558: for (int i = 2, y = 0, u = 0x80; i < 13; i++) {
559: for (int j = 0, c = 0; j < 6; j++) {
560: c <<= 1;
561:
562: if (((int) b[y] & u) != 0)
563: c |= 1;
564:
565: u >>>= 1;
566:
567: if (u == 0) {
568: y++;
569: u = 0x80;
570: }
571: buffer[i] = alphabet.charAt(c);
572: }
573: }
574: return new String(buffer);
575: }
576: }
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