001: /*-------------------------------------------------------------------------
002: *
003: * Copyright (c) 2003-2005, PostgreSQL Global Development Group
004: *
005: * IDENTIFICATION
006: * $PostgreSQL: pgjdbc/org/postgresql/util/UnixCrypt.java,v 1.8 2005/01/11 08:25:49 jurka Exp $
007: *
008: *-------------------------------------------------------------------------
009: */
010: package org.postgresql.util;
011:
012: /**
013: * Contains static methods to encrypt and compare
014: * passwords with Unix encrypted passwords.
015: * <P>See <A HREF="http://www.zeh.com/local/jfd/crypt.html">
016: * John Dumas's Java Crypt page</A> for the original source.</P>
017: *
018: * @author jdumas@zgs.com (John Dumas)
019: */
020: public class UnixCrypt extends Object {
021: //
022: // Null constructor - can't instantiate class
023: private UnixCrypt() {
024: }
025:
026: private static final char[] saltChars = ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./"
027: .toCharArray());
028:
029: private static final int ITERATIONS = 16;
030:
031: private static final int con_salt[] = { 0x00, 0x00, 0x00, 0x00,
032: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
033: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
034: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
035: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
036: 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
037: 0x08, 0x09, 0x0A, 0x0B, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
038: 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14,
039: 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E,
040: 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x20, 0x21, 0x22,
041: 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C,
042: 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
043: 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x00,
044: 0x00, 0x00, 0x00, 0x00, };
045:
046: private static final boolean shifts2[] = { false, false, true,
047: true, true, true, true, true, false, true, true, true,
048: true, true, true, false };
049:
050: private static final int skb[][] = {
051: {
052: /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
053: 0x00000000, 0x00000010, 0x20000000, 0x20000010, 0x00010000,
054: 0x00010010, 0x20010000, 0x20010010, 0x00000800,
055: 0x00000810, 0x20000800, 0x20000810, 0x00010800,
056: 0x00010810, 0x20010800, 0x20010810, 0x00000020,
057: 0x00000030, 0x20000020, 0x20000030, 0x00010020,
058: 0x00010030, 0x20010020, 0x20010030, 0x00000820,
059: 0x00000830, 0x20000820, 0x20000830, 0x00010820,
060: 0x00010830, 0x20010820, 0x20010830, 0x00080000,
061: 0x00080010, 0x20080000, 0x20080010, 0x00090000,
062: 0x00090010, 0x20090000, 0x20090010, 0x00080800,
063: 0x00080810, 0x20080800, 0x20080810, 0x00090800,
064: 0x00090810, 0x20090800, 0x20090810, 0x00080020,
065: 0x00080030, 0x20080020, 0x20080030, 0x00090020,
066: 0x00090030, 0x20090020, 0x20090030, 0x00080820,
067: 0x00080830, 0x20080820, 0x20080830, 0x00090820,
068: 0x00090830, 0x20090820, 0x20090830, },
069: {
070: /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
071: 0x00000000, 0x02000000, 0x00002000, 0x02002000, 0x00200000,
072: 0x02200000, 0x00202000, 0x02202000, 0x00000004,
073: 0x02000004, 0x00002004, 0x02002004, 0x00200004,
074: 0x02200004, 0x00202004, 0x02202004, 0x00000400,
075: 0x02000400, 0x00002400, 0x02002400, 0x00200400,
076: 0x02200400, 0x00202400, 0x02202400, 0x00000404,
077: 0x02000404, 0x00002404, 0x02002404, 0x00200404,
078: 0x02200404, 0x00202404, 0x02202404, 0x10000000,
079: 0x12000000, 0x10002000, 0x12002000, 0x10200000,
080: 0x12200000, 0x10202000, 0x12202000, 0x10000004,
081: 0x12000004, 0x10002004, 0x12002004, 0x10200004,
082: 0x12200004, 0x10202004, 0x12202004, 0x10000400,
083: 0x12000400, 0x10002400, 0x12002400, 0x10200400,
084: 0x12200400, 0x10202400, 0x12202400, 0x10000404,
085: 0x12000404, 0x10002404, 0x12002404, 0x10200404,
086: 0x12200404, 0x10202404, 0x12202404, },
087: {
088: /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
089: 0x00000000, 0x00000001, 0x00040000, 0x00040001, 0x01000000,
090: 0x01000001, 0x01040000, 0x01040001, 0x00000002,
091: 0x00000003, 0x00040002, 0x00040003, 0x01000002,
092: 0x01000003, 0x01040002, 0x01040003, 0x00000200,
093: 0x00000201, 0x00040200, 0x00040201, 0x01000200,
094: 0x01000201, 0x01040200, 0x01040201, 0x00000202,
095: 0x00000203, 0x00040202, 0x00040203, 0x01000202,
096: 0x01000203, 0x01040202, 0x01040203, 0x08000000,
097: 0x08000001, 0x08040000, 0x08040001, 0x09000000,
098: 0x09000001, 0x09040000, 0x09040001, 0x08000002,
099: 0x08000003, 0x08040002, 0x08040003, 0x09000002,
100: 0x09000003, 0x09040002, 0x09040003, 0x08000200,
101: 0x08000201, 0x08040200, 0x08040201, 0x09000200,
102: 0x09000201, 0x09040200, 0x09040201, 0x08000202,
103: 0x08000203, 0x08040202, 0x08040203, 0x09000202,
104: 0x09000203, 0x09040202, 0x09040203, },
105: {
106: /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
107: 0x00000000, 0x00100000, 0x00000100, 0x00100100, 0x00000008,
108: 0x00100008, 0x00000108, 0x00100108, 0x00001000,
109: 0x00101000, 0x00001100, 0x00101100, 0x00001008,
110: 0x00101008, 0x00001108, 0x00101108, 0x04000000,
111: 0x04100000, 0x04000100, 0x04100100, 0x04000008,
112: 0x04100008, 0x04000108, 0x04100108, 0x04001000,
113: 0x04101000, 0x04001100, 0x04101100, 0x04001008,
114: 0x04101008, 0x04001108, 0x04101108, 0x00020000,
115: 0x00120000, 0x00020100, 0x00120100, 0x00020008,
116: 0x00120008, 0x00020108, 0x00120108, 0x00021000,
117: 0x00121000, 0x00021100, 0x00121100, 0x00021008,
118: 0x00121008, 0x00021108, 0x00121108, 0x04020000,
119: 0x04120000, 0x04020100, 0x04120100, 0x04020008,
120: 0x04120008, 0x04020108, 0x04120108, 0x04021000,
121: 0x04121000, 0x04021100, 0x04121100, 0x04021008,
122: 0x04121008, 0x04021108, 0x04121108, },
123: {
124: /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
125: 0x00000000, 0x10000000, 0x00010000, 0x10010000, 0x00000004,
126: 0x10000004, 0x00010004, 0x10010004, 0x20000000,
127: 0x30000000, 0x20010000, 0x30010000, 0x20000004,
128: 0x30000004, 0x20010004, 0x30010004, 0x00100000,
129: 0x10100000, 0x00110000, 0x10110000, 0x00100004,
130: 0x10100004, 0x00110004, 0x10110004, 0x20100000,
131: 0x30100000, 0x20110000, 0x30110000, 0x20100004,
132: 0x30100004, 0x20110004, 0x30110004, 0x00001000,
133: 0x10001000, 0x00011000, 0x10011000, 0x00001004,
134: 0x10001004, 0x00011004, 0x10011004, 0x20001000,
135: 0x30001000, 0x20011000, 0x30011000, 0x20001004,
136: 0x30001004, 0x20011004, 0x30011004, 0x00101000,
137: 0x10101000, 0x00111000, 0x10111000, 0x00101004,
138: 0x10101004, 0x00111004, 0x10111004, 0x20101000,
139: 0x30101000, 0x20111000, 0x30111000, 0x20101004,
140: 0x30101004, 0x20111004, 0x30111004, },
141: {
142: /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
143: 0x00000000, 0x08000000, 0x00000008, 0x08000008, 0x00000400,
144: 0x08000400, 0x00000408, 0x08000408, 0x00020000,
145: 0x08020000, 0x00020008, 0x08020008, 0x00020400,
146: 0x08020400, 0x00020408, 0x08020408, 0x00000001,
147: 0x08000001, 0x00000009, 0x08000009, 0x00000401,
148: 0x08000401, 0x00000409, 0x08000409, 0x00020001,
149: 0x08020001, 0x00020009, 0x08020009, 0x00020401,
150: 0x08020401, 0x00020409, 0x08020409, 0x02000000,
151: 0x0A000000, 0x02000008, 0x0A000008, 0x02000400,
152: 0x0A000400, 0x02000408, 0x0A000408, 0x02020000,
153: 0x0A020000, 0x02020008, 0x0A020008, 0x02020400,
154: 0x0A020400, 0x02020408, 0x0A020408, 0x02000001,
155: 0x0A000001, 0x02000009, 0x0A000009, 0x02000401,
156: 0x0A000401, 0x02000409, 0x0A000409, 0x02020001,
157: 0x0A020001, 0x02020009, 0x0A020009, 0x02020401,
158: 0x0A020401, 0x02020409, 0x0A020409, },
159: {
160: /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
161: 0x00000000, 0x00000100, 0x00080000, 0x00080100, 0x01000000,
162: 0x01000100, 0x01080000, 0x01080100, 0x00000010,
163: 0x00000110, 0x00080010, 0x00080110, 0x01000010,
164: 0x01000110, 0x01080010, 0x01080110, 0x00200000,
165: 0x00200100, 0x00280000, 0x00280100, 0x01200000,
166: 0x01200100, 0x01280000, 0x01280100, 0x00200010,
167: 0x00200110, 0x00280010, 0x00280110, 0x01200010,
168: 0x01200110, 0x01280010, 0x01280110, 0x00000200,
169: 0x00000300, 0x00080200, 0x00080300, 0x01000200,
170: 0x01000300, 0x01080200, 0x01080300, 0x00000210,
171: 0x00000310, 0x00080210, 0x00080310, 0x01000210,
172: 0x01000310, 0x01080210, 0x01080310, 0x00200200,
173: 0x00200300, 0x00280200, 0x00280300, 0x01200200,
174: 0x01200300, 0x01280200, 0x01280300, 0x00200210,
175: 0x00200310, 0x00280210, 0x00280310, 0x01200210,
176: 0x01200310, 0x01280210, 0x01280310, },
177: {
178: /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
179: 0x00000000, 0x04000000, 0x00040000, 0x04040000, 0x00000002,
180: 0x04000002, 0x00040002, 0x04040002, 0x00002000,
181: 0x04002000, 0x00042000, 0x04042000, 0x00002002,
182: 0x04002002, 0x00042002, 0x04042002, 0x00000020,
183: 0x04000020, 0x00040020, 0x04040020, 0x00000022,
184: 0x04000022, 0x00040022, 0x04040022, 0x00002020,
185: 0x04002020, 0x00042020, 0x04042020, 0x00002022,
186: 0x04002022, 0x00042022, 0x04042022, 0x00000800,
187: 0x04000800, 0x00040800, 0x04040800, 0x00000802,
188: 0x04000802, 0x00040802, 0x04040802, 0x00002800,
189: 0x04002800, 0x00042800, 0x04042800, 0x00002802,
190: 0x04002802, 0x00042802, 0x04042802, 0x00000820,
191: 0x04000820, 0x00040820, 0x04040820, 0x00000822,
192: 0x04000822, 0x00040822, 0x04040822, 0x00002820,
193: 0x04002820, 0x00042820, 0x04042820, 0x00002822,
194: 0x04002822, 0x00042822, 0x04042822, }, };
195:
196: private static final int SPtrans[][] = {
197: {
198: /* nibble 0 */
199: 0x00820200, 0x00020000, 0x80800000, 0x80820200, 0x00800000,
200: 0x80020200, 0x80020000, 0x80800000, 0x80020200,
201: 0x00820200, 0x00820000, 0x80000200, 0x80800200,
202: 0x00800000, 0x00000000, 0x80020000, 0x00020000,
203: 0x80000000, 0x00800200, 0x00020200, 0x80820200,
204: 0x00820000, 0x80000200, 0x00800200, 0x80000000,
205: 0x00000200, 0x00020200, 0x80820000, 0x00000200,
206: 0x80800200, 0x80820000, 0x00000000, 0x00000000,
207: 0x80820200, 0x00800200, 0x80020000, 0x00820200,
208: 0x00020000, 0x80000200, 0x00800200, 0x80820000,
209: 0x00000200, 0x00020200, 0x80800000, 0x80020200,
210: 0x80000000, 0x80800000, 0x00820000, 0x80820200,
211: 0x00020200, 0x00820000, 0x80800200, 0x00800000,
212: 0x80000200, 0x80020000, 0x00000000, 0x00020000,
213: 0x00800000, 0x80800200, 0x00820200, 0x80000000,
214: 0x80820000, 0x00000200, 0x80020200, },
215: {
216: /* nibble 1 */
217: 0x10042004, 0x00000000, 0x00042000, 0x10040000, 0x10000004,
218: 0x00002004, 0x10002000, 0x00042000, 0x00002000,
219: 0x10040004, 0x00000004, 0x10002000, 0x00040004,
220: 0x10042000, 0x10040000, 0x00000004, 0x00040000,
221: 0x10002004, 0x10040004, 0x00002000, 0x00042004,
222: 0x10000000, 0x00000000, 0x00040004, 0x10002004,
223: 0x00042004, 0x10042000, 0x10000004, 0x10000000,
224: 0x00040000, 0x00002004, 0x10042004, 0x00040004,
225: 0x10042000, 0x10002000, 0x00042004, 0x10042004,
226: 0x00040004, 0x10000004, 0x00000000, 0x10000000,
227: 0x00002004, 0x00040000, 0x10040004, 0x00002000,
228: 0x10000000, 0x00042004, 0x10002004, 0x10042000,
229: 0x00002000, 0x00000000, 0x10000004, 0x00000004,
230: 0x10042004, 0x00042000, 0x10040000, 0x10040004,
231: 0x00040000, 0x00002004, 0x10002000, 0x10002004,
232: 0x00000004, 0x10040000, 0x00042000, },
233: {
234: /* nibble 2 */
235: 0x41000000, 0x01010040, 0x00000040, 0x41000040, 0x40010000,
236: 0x01000000, 0x41000040, 0x00010040, 0x01000040,
237: 0x00010000, 0x01010000, 0x40000000, 0x41010040,
238: 0x40000040, 0x40000000, 0x41010000, 0x00000000,
239: 0x40010000, 0x01010040, 0x00000040, 0x40000040,
240: 0x41010040, 0x00010000, 0x41000000, 0x41010000,
241: 0x01000040, 0x40010040, 0x01010000, 0x00010040,
242: 0x00000000, 0x01000000, 0x40010040, 0x01010040,
243: 0x00000040, 0x40000000, 0x00010000, 0x40000040,
244: 0x40010000, 0x01010000, 0x41000040, 0x00000000,
245: 0x01010040, 0x00010040, 0x41010000, 0x40010000,
246: 0x01000000, 0x41010040, 0x40000000, 0x40010040,
247: 0x41000000, 0x01000000, 0x41010040, 0x00010000,
248: 0x01000040, 0x41000040, 0x00010040, 0x01000040,
249: 0x00000000, 0x41010000, 0x40000040, 0x41000000,
250: 0x40010040, 0x00000040, 0x01010000, },
251: {
252: /* nibble 3 */
253: 0x00100402, 0x04000400, 0x00000002, 0x04100402, 0x00000000,
254: 0x04100000, 0x04000402, 0x00100002, 0x04100400,
255: 0x04000002, 0x04000000, 0x00000402, 0x04000002,
256: 0x00100402, 0x00100000, 0x04000000, 0x04100002,
257: 0x00100400, 0x00000400, 0x00000002, 0x00100400,
258: 0x04000402, 0x04100000, 0x00000400, 0x00000402,
259: 0x00000000, 0x00100002, 0x04100400, 0x04000400,
260: 0x04100002, 0x04100402, 0x00100000, 0x04100002,
261: 0x00000402, 0x00100000, 0x04000002, 0x00100400,
262: 0x04000400, 0x00000002, 0x04100000, 0x04000402,
263: 0x00000000, 0x00000400, 0x00100002, 0x00000000,
264: 0x04100002, 0x04100400, 0x00000400, 0x04000000,
265: 0x04100402, 0x00100402, 0x00100000, 0x04100402,
266: 0x00000002, 0x04000400, 0x00100402, 0x00100002,
267: 0x00100400, 0x04100000, 0x04000402, 0x00000402,
268: 0x04000000, 0x04000002, 0x04100400, },
269: {
270: /* nibble 4 */
271: 0x02000000, 0x00004000, 0x00000100, 0x02004108, 0x02004008,
272: 0x02000100, 0x00004108, 0x02004000, 0x00004000,
273: 0x00000008, 0x02000008, 0x00004100, 0x02000108,
274: 0x02004008, 0x02004100, 0x00000000, 0x00004100,
275: 0x02000000, 0x00004008, 0x00000108, 0x02000100,
276: 0x00004108, 0x00000000, 0x02000008, 0x00000008,
277: 0x02000108, 0x02004108, 0x00004008, 0x02004000,
278: 0x00000100, 0x00000108, 0x02004100, 0x02004100,
279: 0x02000108, 0x00004008, 0x02004000, 0x00004000,
280: 0x00000008, 0x02000008, 0x02000100, 0x02000000,
281: 0x00004100, 0x02004108, 0x00000000, 0x00004108,
282: 0x02000000, 0x00000100, 0x00004008, 0x02000108,
283: 0x00000100, 0x00000000, 0x02004108, 0x02004008,
284: 0x02004100, 0x00000108, 0x00004000, 0x00004100,
285: 0x02004008, 0x02000100, 0x00000108, 0x00000008,
286: 0x00004108, 0x02004000, 0x02000008, },
287: {
288: /* nibble 5 */
289: 0x20000010, 0x00080010, 0x00000000, 0x20080800, 0x00080010,
290: 0x00000800, 0x20000810, 0x00080000, 0x00000810,
291: 0x20080810, 0x00080800, 0x20000000, 0x20000800,
292: 0x20000010, 0x20080000, 0x00080810, 0x00080000,
293: 0x20000810, 0x20080010, 0x00000000, 0x00000800,
294: 0x00000010, 0x20080800, 0x20080010, 0x20080810,
295: 0x20080000, 0x20000000, 0x00000810, 0x00000010,
296: 0x00080800, 0x00080810, 0x20000800, 0x00000810,
297: 0x20000000, 0x20000800, 0x00080810, 0x20080800,
298: 0x00080010, 0x00000000, 0x20000800, 0x20000000,
299: 0x00000800, 0x20080010, 0x00080000, 0x00080010,
300: 0x20080810, 0x00080800, 0x00000010, 0x20080810,
301: 0x00080800, 0x00080000, 0x20000810, 0x20000010,
302: 0x20080000, 0x00080810, 0x00000000, 0x00000800,
303: 0x20000010, 0x20000810, 0x20080800, 0x20080000,
304: 0x00000810, 0x00000010, 0x20080010, },
305: {
306: /* nibble 6 */
307: 0x00001000, 0x00000080, 0x00400080, 0x00400001, 0x00401081,
308: 0x00001001, 0x00001080, 0x00000000, 0x00400000,
309: 0x00400081, 0x00000081, 0x00401000, 0x00000001,
310: 0x00401080, 0x00401000, 0x00000081, 0x00400081,
311: 0x00001000, 0x00001001, 0x00401081, 0x00000000,
312: 0x00400080, 0x00400001, 0x00001080, 0x00401001,
313: 0x00001081, 0x00401080, 0x00000001, 0x00001081,
314: 0x00401001, 0x00000080, 0x00400000, 0x00001081,
315: 0x00401000, 0x00401001, 0x00000081, 0x00001000,
316: 0x00000080, 0x00400000, 0x00401001, 0x00400081,
317: 0x00001081, 0x00001080, 0x00000000, 0x00000080,
318: 0x00400001, 0x00000001, 0x00400080, 0x00000000,
319: 0x00400081, 0x00400080, 0x00001080, 0x00000081,
320: 0x00001000, 0x00401081, 0x00400000, 0x00401080,
321: 0x00000001, 0x00001001, 0x00401081, 0x00400001,
322: 0x00401080, 0x00401000, 0x00001001, },
323: {
324: /* nibble 7 */
325: 0x08200020, 0x08208000, 0x00008020, 0x00000000, 0x08008000,
326: 0x00200020, 0x08200000, 0x08208020, 0x00000020,
327: 0x08000000, 0x00208000, 0x00008020, 0x00208020,
328: 0x08008020, 0x08000020, 0x08200000, 0x00008000,
329: 0x00208020, 0x00200020, 0x08008000, 0x08208020,
330: 0x08000020, 0x00000000, 0x00208000, 0x08000000,
331: 0x00200000, 0x08008020, 0x08200020, 0x00200000,
332: 0x00008000, 0x08208000, 0x00000020, 0x00200000,
333: 0x00008000, 0x08000020, 0x08208020, 0x00008020,
334: 0x08000000, 0x00000000, 0x00208000, 0x08200020,
335: 0x08008020, 0x08008000, 0x00200020, 0x08208000,
336: 0x00000020, 0x00200020, 0x08008000, 0x08208020,
337: 0x00200000, 0x08200000, 0x08000020, 0x00208000,
338: 0x00008020, 0x08008020, 0x08200000, 0x00000020,
339: 0x08208000, 0x00208020, 0x00000000, 0x08000000,
340: 0x08200020, 0x00008000, 0x00208020 } };
341:
342: private static final int cov_2char[] = { 0x2E, 0x2F, 0x30, 0x31,
343: 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x41, 0x42,
344: 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
345: 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56,
346: 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
347: 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
348: 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A };
349:
350: private static final int byteToUnsigned(byte b) {
351: int value = (int) b;
352:
353: return (value >= 0 ? value : value + 256);
354: }
355:
356: private static int fourBytesToInt(byte b[], int offset) {
357: int value;
358:
359: value = byteToUnsigned(b[offset++]);
360: value |= (byteToUnsigned(b[offset++]) << 8);
361: value |= (byteToUnsigned(b[offset++]) << 16);
362: value |= (byteToUnsigned(b[offset++]) << 24);
363:
364: return (value);
365: }
366:
367: private static final void intToFourBytes(int iValue, byte b[],
368: int offset) {
369: b[offset++] = (byte) ((iValue) & 0xff);
370: b[offset++] = (byte) ((iValue >>> 8) & 0xff);
371: b[offset++] = (byte) ((iValue >>> 16) & 0xff);
372: b[offset++] = (byte) ((iValue >>> 24) & 0xff);
373: }
374:
375: private static final void PERM_OP(int a, int b, int n, int m,
376: int results[]) {
377: int t;
378:
379: t = ((a >>> n) ^ b) & m;
380: a ^= t << n;
381: b ^= t;
382:
383: results[0] = a;
384: results[1] = b;
385: }
386:
387: private static final int HPERM_OP(int a, int n, int m) {
388: int t;
389:
390: t = ((a << (16 - n)) ^ a) & m;
391: a = a ^ t ^ (t >>> (16 - n));
392:
393: return (a);
394: }
395:
396: private static int[] des_set_key(byte key[]) {
397: int schedule[] = new int[ITERATIONS * 2];
398:
399: int c = fourBytesToInt(key, 0);
400: int d = fourBytesToInt(key, 4);
401:
402: int results[] = new int[2];
403:
404: PERM_OP(d, c, 4, 0x0f0f0f0f, results);
405: d = results[0];
406: c = results[1];
407:
408: c = HPERM_OP(c, -2, 0xcccc0000);
409: d = HPERM_OP(d, -2, 0xcccc0000);
410:
411: PERM_OP(d, c, 1, 0x55555555, results);
412: d = results[0];
413: c = results[1];
414:
415: PERM_OP(c, d, 8, 0x00ff00ff, results);
416: c = results[0];
417: d = results[1];
418:
419: PERM_OP(d, c, 1, 0x55555555, results);
420: d = results[0];
421: c = results[1];
422:
423: d = (((d & 0x000000ff) << 16) | (d & 0x0000ff00)
424: | ((d & 0x00ff0000) >>> 16) | ((c & 0xf0000000) >>> 4));
425: c &= 0x0fffffff;
426:
427: int s, t;
428: int j = 0;
429:
430: for (int i = 0; i < ITERATIONS; i++) {
431: if (shifts2[i]) {
432: c = (c >>> 2) | (c << 26);
433: d = (d >>> 2) | (d << 26);
434: } else {
435: c = (c >>> 1) | (c << 27);
436: d = (d >>> 1) | (d << 27);
437: }
438:
439: c &= 0x0fffffff;
440: d &= 0x0fffffff;
441:
442: s = skb[0][(c) & 0x3f]
443: | skb[1][((c >>> 6) & 0x03) | ((c >>> 7) & 0x3c)]
444: | skb[2][((c >>> 13) & 0x0f) | ((c >>> 14) & 0x30)]
445: | skb[3][((c >>> 20) & 0x01) | ((c >>> 21) & 0x06)
446: | ((c >>> 22) & 0x38)];
447:
448: t = skb[4][(d) & 0x3f]
449: | skb[5][((d >>> 7) & 0x03) | ((d >>> 8) & 0x3c)]
450: | skb[6][(d >>> 15) & 0x3f]
451: | skb[7][((d >>> 21) & 0x0f) | ((d >>> 22) & 0x30)];
452:
453: schedule[j++] = ((t << 16) | (s & 0x0000ffff)) & 0xffffffff;
454: s = ((s >>> 16) | (t & 0xffff0000));
455:
456: s = (s << 4) | (s >>> 28);
457: schedule[j++] = s & 0xffffffff;
458: }
459: return (schedule);
460: }
461:
462: private static final int D_ENCRYPT(int L, int R, int S, int E0,
463: int E1, int s[]) {
464: int t, u, v;
465:
466: v = R ^ (R >>> 16);
467: u = v & E0;
468: v = v & E1;
469: u = (u ^ (u << 16)) ^ R ^ s[S];
470: t = (v ^ (v << 16)) ^ R ^ s[S + 1];
471: t = (t >>> 4) | (t << 28);
472:
473: L ^= SPtrans[1][(t) & 0x3f] | SPtrans[3][(t >>> 8) & 0x3f]
474: | SPtrans[5][(t >>> 16) & 0x3f]
475: | SPtrans[7][(t >>> 24) & 0x3f]
476: | SPtrans[0][(u) & 0x3f] | SPtrans[2][(u >>> 8) & 0x3f]
477: | SPtrans[4][(u >>> 16) & 0x3f]
478: | SPtrans[6][(u >>> 24) & 0x3f];
479:
480: return (L);
481: }
482:
483: private static final int[] body(int schedule[], int Eswap0,
484: int Eswap1) {
485: int left = 0;
486: int right = 0;
487: int t = 0;
488:
489: for (int j = 0; j < 25; j++) {
490: for (int i = 0; i < ITERATIONS * 2; i += 4) {
491: left = D_ENCRYPT(left, right, i, Eswap0, Eswap1,
492: schedule);
493: right = D_ENCRYPT(right, left, i + 2, Eswap0, Eswap1,
494: schedule);
495: }
496: t = left;
497: left = right;
498: right = t;
499: }
500:
501: t = right;
502:
503: right = (left >>> 1) | (left << 31);
504: left = (t >>> 1) | (t << 31);
505:
506: left &= 0xffffffff;
507: right &= 0xffffffff;
508:
509: int results[] = new int[2];
510:
511: PERM_OP(right, left, 1, 0x55555555, results);
512: right = results[0];
513: left = results[1];
514:
515: PERM_OP(left, right, 8, 0x00ff00ff, results);
516: left = results[0];
517: right = results[1];
518:
519: PERM_OP(right, left, 2, 0x33333333, results);
520: right = results[0];
521: left = results[1];
522:
523: PERM_OP(left, right, 16, 0x0000ffff, results);
524: left = results[0];
525: right = results[1];
526:
527: PERM_OP(right, left, 4, 0x0f0f0f0f, results);
528: right = results[0];
529: left = results[1];
530:
531: int out[] = new int[2];
532:
533: out[0] = left;
534: out[1] = right;
535:
536: return (out);
537: }
538:
539: /*
540: * <P>Encrypt a password given the cleartext password and a "salt".</P>
541: * @param salt A two-character string representing the salt used to
542: * iterate the encryption engine in lots of different ways. If you
543: * are generating a new encryption then this value should be
544: * randomised.
545: * @param original The password to be encrypted.
546: * @return A string consisting of the 2-character salt followed by the
547: * encrypted password.
548: */
549: public static final String crypt(String salt, String original) {
550: while (salt.length() < 2)
551: salt += "A";
552:
553: StringBuffer buffer = new StringBuffer(" ");
554:
555: char charZero = salt.charAt(0);
556: char charOne = salt.charAt(1);
557:
558: buffer.setCharAt(0, charZero);
559: buffer.setCharAt(1, charOne);
560:
561: int Eswap0 = con_salt[(int) charZero];
562: int Eswap1 = con_salt[(int) charOne] << 4;
563:
564: byte key[] = new byte[8];
565:
566: for (int i = 0; i < key.length; i++)
567: key[i] = (byte) 0;
568:
569: for (int i = 0; i < key.length && i < original.length(); i++) {
570: int iChar = (int) original.charAt(i);
571:
572: key[i] = (byte) (iChar << 1);
573: }
574:
575: int schedule[] = des_set_key(key);
576: int out[] = body(schedule, Eswap0, Eswap1);
577:
578: byte b[] = new byte[9];
579:
580: intToFourBytes(out[0], b, 0);
581: intToFourBytes(out[1], b, 4);
582: b[8] = 0;
583:
584: for (int i = 2, y = 0, u = 0x80; i < 13; i++) {
585: for (int j = 0, c = 0; j < 6; j++) {
586: c <<= 1;
587:
588: if (((int) b[y] & u) != 0)
589: c |= 1;
590:
591: u >>>= 1;
592:
593: if (u == 0) {
594: y++;
595: u = 0x80;
596: }
597: buffer.setCharAt(i, (char) cov_2char[c]);
598: }
599: }
600: return (buffer.toString());
601: }
602:
603: /*
604: * <P>Encrypt a password given the cleartext password. This method
605: * generates a random salt using the 'java.util.Random' class.</P>
606: * @param original The password to be encrypted.
607: * @return A string consisting of the 2-character salt followed by the
608: * encrypted password.
609: */
610: public static final String crypt(String original) {
611: java.util.Random randomGenerator = new java.util.Random();
612: int numSaltChars = saltChars.length;
613: String salt;
614:
615: salt = (new StringBuffer()).append(
616: saltChars[Math.abs(randomGenerator.nextInt())
617: % numSaltChars]).append(
618: saltChars[Math.abs(randomGenerator.nextInt())
619: % numSaltChars]).toString();
620:
621: return crypt(salt, original);
622: }
623:
624: /*
625: * <P>Check that <I>enteredPassword</I> encrypts to
626: * <I>encryptedPassword</I>.</P>
627: * @param encryptedPassword The <I>encryptedPassword</I>. The first
628: * two characters are assumed to be the salt. This string would
629: * be the same as one found in a Unix <U>/etc/passwd</U> file.
630: * @param enteredPassword The password as entered by the user (or
631: * otherwise aquired).
632: * @return <B>true</B> if the password should be considered correct.
633: */
634: public final static boolean matches(String encryptedPassword,
635: String enteredPassword) {
636: String salt = encryptedPassword.substring(0, 3);
637: String newCrypt = crypt(salt, enteredPassword);
638:
639: return newCrypt.equals(encryptedPassword);
640: }
641: }
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