001: /****************************************************************************
002: * jcrypt.java
003: *
004: * Java-based implementation of the unix crypt command
005: *
006: * Based upon C source code written by Eric Young, eay@psych.uq.oz.au
007: *
008: * Java version by John Dumas, jdumas@zeh.com.
009: * See http://208.223.9.21/jfd/crypt.html
010: *
011: * Distributed with Ganymede by permission of the author
012: *
013: ****************************************************************************/package jcrypt; // thanks, 1.4 javac! ;-(
014:
015: /**
016: * Java-based implementation of the unix crypt command.
017: *
018: * @author John Dumas <jdumas@zeh.com>
019: */
020: public class jcrypt {
021: private jcrypt() {
022: }
023:
024: private static final boolean debug = false;
025:
026: private static final String SALTCHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
027:
028: private static final java.util.Random randgen = new java.util.Random();
029:
030: private static final int ITERATIONS = 16;
031:
032: private static final int con_salt[] = { 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, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
037: 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
038: 0x08, 0x09, 0x0A, 0x0B, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
039: 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14,
040: 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E,
041: 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x20, 0x21, 0x22,
042: 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C,
043: 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
044: 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x00,
045: 0x00, 0x00, 0x00, 0x00, };
046:
047: private static final boolean shifts2[] = { false, false, true,
048: true, true, true, true, true, false, true, true, true,
049: true, true, true, false };
050:
051: private static final int skb[][] = {
052: {
053: /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
054: 0x00000000, 0x00000010, 0x20000000, 0x20000010, 0x00010000,
055: 0x00010010, 0x20010000, 0x20010010, 0x00000800,
056: 0x00000810, 0x20000800, 0x20000810, 0x00010800,
057: 0x00010810, 0x20010800, 0x20010810, 0x00000020,
058: 0x00000030, 0x20000020, 0x20000030, 0x00010020,
059: 0x00010030, 0x20010020, 0x20010030, 0x00000820,
060: 0x00000830, 0x20000820, 0x20000830, 0x00010820,
061: 0x00010830, 0x20010820, 0x20010830, 0x00080000,
062: 0x00080010, 0x20080000, 0x20080010, 0x00090000,
063: 0x00090010, 0x20090000, 0x20090010, 0x00080800,
064: 0x00080810, 0x20080800, 0x20080810, 0x00090800,
065: 0x00090810, 0x20090800, 0x20090810, 0x00080020,
066: 0x00080030, 0x20080020, 0x20080030, 0x00090020,
067: 0x00090030, 0x20090020, 0x20090030, 0x00080820,
068: 0x00080830, 0x20080820, 0x20080830, 0x00090820,
069: 0x00090830, 0x20090820, 0x20090830, },
070: {
071: /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
072: 0x00000000, 0x02000000, 0x00002000, 0x02002000, 0x00200000,
073: 0x02200000, 0x00202000, 0x02202000, 0x00000004,
074: 0x02000004, 0x00002004, 0x02002004, 0x00200004,
075: 0x02200004, 0x00202004, 0x02202004, 0x00000400,
076: 0x02000400, 0x00002400, 0x02002400, 0x00200400,
077: 0x02200400, 0x00202400, 0x02202400, 0x00000404,
078: 0x02000404, 0x00002404, 0x02002404, 0x00200404,
079: 0x02200404, 0x00202404, 0x02202404, 0x10000000,
080: 0x12000000, 0x10002000, 0x12002000, 0x10200000,
081: 0x12200000, 0x10202000, 0x12202000, 0x10000004,
082: 0x12000004, 0x10002004, 0x12002004, 0x10200004,
083: 0x12200004, 0x10202004, 0x12202004, 0x10000400,
084: 0x12000400, 0x10002400, 0x12002400, 0x10200400,
085: 0x12200400, 0x10202400, 0x12202400, 0x10000404,
086: 0x12000404, 0x10002404, 0x12002404, 0x10200404,
087: 0x12200404, 0x10202404, 0x12202404, },
088: {
089: /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
090: 0x00000000, 0x00000001, 0x00040000, 0x00040001, 0x01000000,
091: 0x01000001, 0x01040000, 0x01040001, 0x00000002,
092: 0x00000003, 0x00040002, 0x00040003, 0x01000002,
093: 0x01000003, 0x01040002, 0x01040003, 0x00000200,
094: 0x00000201, 0x00040200, 0x00040201, 0x01000200,
095: 0x01000201, 0x01040200, 0x01040201, 0x00000202,
096: 0x00000203, 0x00040202, 0x00040203, 0x01000202,
097: 0x01000203, 0x01040202, 0x01040203, 0x08000000,
098: 0x08000001, 0x08040000, 0x08040001, 0x09000000,
099: 0x09000001, 0x09040000, 0x09040001, 0x08000002,
100: 0x08000003, 0x08040002, 0x08040003, 0x09000002,
101: 0x09000003, 0x09040002, 0x09040003, 0x08000200,
102: 0x08000201, 0x08040200, 0x08040201, 0x09000200,
103: 0x09000201, 0x09040200, 0x09040201, 0x08000202,
104: 0x08000203, 0x08040202, 0x08040203, 0x09000202,
105: 0x09000203, 0x09040202, 0x09040203, },
106: {
107: /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
108: 0x00000000, 0x00100000, 0x00000100, 0x00100100, 0x00000008,
109: 0x00100008, 0x00000108, 0x00100108, 0x00001000,
110: 0x00101000, 0x00001100, 0x00101100, 0x00001008,
111: 0x00101008, 0x00001108, 0x00101108, 0x04000000,
112: 0x04100000, 0x04000100, 0x04100100, 0x04000008,
113: 0x04100008, 0x04000108, 0x04100108, 0x04001000,
114: 0x04101000, 0x04001100, 0x04101100, 0x04001008,
115: 0x04101008, 0x04001108, 0x04101108, 0x00020000,
116: 0x00120000, 0x00020100, 0x00120100, 0x00020008,
117: 0x00120008, 0x00020108, 0x00120108, 0x00021000,
118: 0x00121000, 0x00021100, 0x00121100, 0x00021008,
119: 0x00121008, 0x00021108, 0x00121108, 0x04020000,
120: 0x04120000, 0x04020100, 0x04120100, 0x04020008,
121: 0x04120008, 0x04020108, 0x04120108, 0x04021000,
122: 0x04121000, 0x04021100, 0x04121100, 0x04021008,
123: 0x04121008, 0x04021108, 0x04121108, },
124: {
125: /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
126: 0x00000000, 0x10000000, 0x00010000, 0x10010000, 0x00000004,
127: 0x10000004, 0x00010004, 0x10010004, 0x20000000,
128: 0x30000000, 0x20010000, 0x30010000, 0x20000004,
129: 0x30000004, 0x20010004, 0x30010004, 0x00100000,
130: 0x10100000, 0x00110000, 0x10110000, 0x00100004,
131: 0x10100004, 0x00110004, 0x10110004, 0x20100000,
132: 0x30100000, 0x20110000, 0x30110000, 0x20100004,
133: 0x30100004, 0x20110004, 0x30110004, 0x00001000,
134: 0x10001000, 0x00011000, 0x10011000, 0x00001004,
135: 0x10001004, 0x00011004, 0x10011004, 0x20001000,
136: 0x30001000, 0x20011000, 0x30011000, 0x20001004,
137: 0x30001004, 0x20011004, 0x30011004, 0x00101000,
138: 0x10101000, 0x00111000, 0x10111000, 0x00101004,
139: 0x10101004, 0x00111004, 0x10111004, 0x20101000,
140: 0x30101000, 0x20111000, 0x30111000, 0x20101004,
141: 0x30101004, 0x20111004, 0x30111004, },
142: {
143: /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
144: 0x00000000, 0x08000000, 0x00000008, 0x08000008, 0x00000400,
145: 0x08000400, 0x00000408, 0x08000408, 0x00020000,
146: 0x08020000, 0x00020008, 0x08020008, 0x00020400,
147: 0x08020400, 0x00020408, 0x08020408, 0x00000001,
148: 0x08000001, 0x00000009, 0x08000009, 0x00000401,
149: 0x08000401, 0x00000409, 0x08000409, 0x00020001,
150: 0x08020001, 0x00020009, 0x08020009, 0x00020401,
151: 0x08020401, 0x00020409, 0x08020409, 0x02000000,
152: 0x0A000000, 0x02000008, 0x0A000008, 0x02000400,
153: 0x0A000400, 0x02000408, 0x0A000408, 0x02020000,
154: 0x0A020000, 0x02020008, 0x0A020008, 0x02020400,
155: 0x0A020400, 0x02020408, 0x0A020408, 0x02000001,
156: 0x0A000001, 0x02000009, 0x0A000009, 0x02000401,
157: 0x0A000401, 0x02000409, 0x0A000409, 0x02020001,
158: 0x0A020001, 0x02020009, 0x0A020009, 0x02020401,
159: 0x0A020401, 0x02020409, 0x0A020409, },
160: {
161: /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
162: 0x00000000, 0x00000100, 0x00080000, 0x00080100, 0x01000000,
163: 0x01000100, 0x01080000, 0x01080100, 0x00000010,
164: 0x00000110, 0x00080010, 0x00080110, 0x01000010,
165: 0x01000110, 0x01080010, 0x01080110, 0x00200000,
166: 0x00200100, 0x00280000, 0x00280100, 0x01200000,
167: 0x01200100, 0x01280000, 0x01280100, 0x00200010,
168: 0x00200110, 0x00280010, 0x00280110, 0x01200010,
169: 0x01200110, 0x01280010, 0x01280110, 0x00000200,
170: 0x00000300, 0x00080200, 0x00080300, 0x01000200,
171: 0x01000300, 0x01080200, 0x01080300, 0x00000210,
172: 0x00000310, 0x00080210, 0x00080310, 0x01000210,
173: 0x01000310, 0x01080210, 0x01080310, 0x00200200,
174: 0x00200300, 0x00280200, 0x00280300, 0x01200200,
175: 0x01200300, 0x01280200, 0x01280300, 0x00200210,
176: 0x00200310, 0x00280210, 0x00280310, 0x01200210,
177: 0x01200310, 0x01280210, 0x01280310, },
178: {
179: /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
180: 0x00000000, 0x04000000, 0x00040000, 0x04040000, 0x00000002,
181: 0x04000002, 0x00040002, 0x04040002, 0x00002000,
182: 0x04002000, 0x00042000, 0x04042000, 0x00002002,
183: 0x04002002, 0x00042002, 0x04042002, 0x00000020,
184: 0x04000020, 0x00040020, 0x04040020, 0x00000022,
185: 0x04000022, 0x00040022, 0x04040022, 0x00002020,
186: 0x04002020, 0x00042020, 0x04042020, 0x00002022,
187: 0x04002022, 0x00042022, 0x04042022, 0x00000800,
188: 0x04000800, 0x00040800, 0x04040800, 0x00000802,
189: 0x04000802, 0x00040802, 0x04040802, 0x00002800,
190: 0x04002800, 0x00042800, 0x04042800, 0x00002802,
191: 0x04002802, 0x00042802, 0x04042802, 0x00000820,
192: 0x04000820, 0x00040820, 0x04040820, 0x00000822,
193: 0x04000822, 0x00040822, 0x04040822, 0x00002820,
194: 0x04002820, 0x00042820, 0x04042820, 0x00002822,
195: 0x04002822, 0x00042822, 0x04042822, }, };
196:
197: private static final int SPtrans[][] = {
198: {
199: /* nibble 0 */
200: 0x00820200, 0x00020000, 0x80800000, 0x80820200, 0x00800000,
201: 0x80020200, 0x80020000, 0x80800000, 0x80020200,
202: 0x00820200, 0x00820000, 0x80000200, 0x80800200,
203: 0x00800000, 0x00000000, 0x80020000, 0x00020000,
204: 0x80000000, 0x00800200, 0x00020200, 0x80820200,
205: 0x00820000, 0x80000200, 0x00800200, 0x80000000,
206: 0x00000200, 0x00020200, 0x80820000, 0x00000200,
207: 0x80800200, 0x80820000, 0x00000000, 0x00000000,
208: 0x80820200, 0x00800200, 0x80020000, 0x00820200,
209: 0x00020000, 0x80000200, 0x00800200, 0x80820000,
210: 0x00000200, 0x00020200, 0x80800000, 0x80020200,
211: 0x80000000, 0x80800000, 0x00820000, 0x80820200,
212: 0x00020200, 0x00820000, 0x80800200, 0x00800000,
213: 0x80000200, 0x80020000, 0x00000000, 0x00020000,
214: 0x00800000, 0x80800200, 0x00820200, 0x80000000,
215: 0x80820000, 0x00000200, 0x80020200, },
216: {
217: /* nibble 1 */
218: 0x10042004, 0x00000000, 0x00042000, 0x10040000, 0x10000004,
219: 0x00002004, 0x10002000, 0x00042000, 0x00002000,
220: 0x10040004, 0x00000004, 0x10002000, 0x00040004,
221: 0x10042000, 0x10040000, 0x00000004, 0x00040000,
222: 0x10002004, 0x10040004, 0x00002000, 0x00042004,
223: 0x10000000, 0x00000000, 0x00040004, 0x10002004,
224: 0x00042004, 0x10042000, 0x10000004, 0x10000000,
225: 0x00040000, 0x00002004, 0x10042004, 0x00040004,
226: 0x10042000, 0x10002000, 0x00042004, 0x10042004,
227: 0x00040004, 0x10000004, 0x00000000, 0x10000000,
228: 0x00002004, 0x00040000, 0x10040004, 0x00002000,
229: 0x10000000, 0x00042004, 0x10002004, 0x10042000,
230: 0x00002000, 0x00000000, 0x10000004, 0x00000004,
231: 0x10042004, 0x00042000, 0x10040000, 0x10040004,
232: 0x00040000, 0x00002004, 0x10002000, 0x10002004,
233: 0x00000004, 0x10040000, 0x00042000, },
234: {
235: /* nibble 2 */
236: 0x41000000, 0x01010040, 0x00000040, 0x41000040, 0x40010000,
237: 0x01000000, 0x41000040, 0x00010040, 0x01000040,
238: 0x00010000, 0x01010000, 0x40000000, 0x41010040,
239: 0x40000040, 0x40000000, 0x41010000, 0x00000000,
240: 0x40010000, 0x01010040, 0x00000040, 0x40000040,
241: 0x41010040, 0x00010000, 0x41000000, 0x41010000,
242: 0x01000040, 0x40010040, 0x01010000, 0x00010040,
243: 0x00000000, 0x01000000, 0x40010040, 0x01010040,
244: 0x00000040, 0x40000000, 0x00010000, 0x40000040,
245: 0x40010000, 0x01010000, 0x41000040, 0x00000000,
246: 0x01010040, 0x00010040, 0x41010000, 0x40010000,
247: 0x01000000, 0x41010040, 0x40000000, 0x40010040,
248: 0x41000000, 0x01000000, 0x41010040, 0x00010000,
249: 0x01000040, 0x41000040, 0x00010040, 0x01000040,
250: 0x00000000, 0x41010000, 0x40000040, 0x41000000,
251: 0x40010040, 0x00000040, 0x01010000, },
252: {
253: /* nibble 3 */
254: 0x00100402, 0x04000400, 0x00000002, 0x04100402, 0x00000000,
255: 0x04100000, 0x04000402, 0x00100002, 0x04100400,
256: 0x04000002, 0x04000000, 0x00000402, 0x04000002,
257: 0x00100402, 0x00100000, 0x04000000, 0x04100002,
258: 0x00100400, 0x00000400, 0x00000002, 0x00100400,
259: 0x04000402, 0x04100000, 0x00000400, 0x00000402,
260: 0x00000000, 0x00100002, 0x04100400, 0x04000400,
261: 0x04100002, 0x04100402, 0x00100000, 0x04100002,
262: 0x00000402, 0x00100000, 0x04000002, 0x00100400,
263: 0x04000400, 0x00000002, 0x04100000, 0x04000402,
264: 0x00000000, 0x00000400, 0x00100002, 0x00000000,
265: 0x04100002, 0x04100400, 0x00000400, 0x04000000,
266: 0x04100402, 0x00100402, 0x00100000, 0x04100402,
267: 0x00000002, 0x04000400, 0x00100402, 0x00100002,
268: 0x00100400, 0x04100000, 0x04000402, 0x00000402,
269: 0x04000000, 0x04000002, 0x04100400, },
270: {
271: /* nibble 4 */
272: 0x02000000, 0x00004000, 0x00000100, 0x02004108, 0x02004008,
273: 0x02000100, 0x00004108, 0x02004000, 0x00004000,
274: 0x00000008, 0x02000008, 0x00004100, 0x02000108,
275: 0x02004008, 0x02004100, 0x00000000, 0x00004100,
276: 0x02000000, 0x00004008, 0x00000108, 0x02000100,
277: 0x00004108, 0x00000000, 0x02000008, 0x00000008,
278: 0x02000108, 0x02004108, 0x00004008, 0x02004000,
279: 0x00000100, 0x00000108, 0x02004100, 0x02004100,
280: 0x02000108, 0x00004008, 0x02004000, 0x00004000,
281: 0x00000008, 0x02000008, 0x02000100, 0x02000000,
282: 0x00004100, 0x02004108, 0x00000000, 0x00004108,
283: 0x02000000, 0x00000100, 0x00004008, 0x02000108,
284: 0x00000100, 0x00000000, 0x02004108, 0x02004008,
285: 0x02004100, 0x00000108, 0x00004000, 0x00004100,
286: 0x02004008, 0x02000100, 0x00000108, 0x00000008,
287: 0x00004108, 0x02004000, 0x02000008, },
288: {
289: /* nibble 5 */
290: 0x20000010, 0x00080010, 0x00000000, 0x20080800, 0x00080010,
291: 0x00000800, 0x20000810, 0x00080000, 0x00000810,
292: 0x20080810, 0x00080800, 0x20000000, 0x20000800,
293: 0x20000010, 0x20080000, 0x00080810, 0x00080000,
294: 0x20000810, 0x20080010, 0x00000000, 0x00000800,
295: 0x00000010, 0x20080800, 0x20080010, 0x20080810,
296: 0x20080000, 0x20000000, 0x00000810, 0x00000010,
297: 0x00080800, 0x00080810, 0x20000800, 0x00000810,
298: 0x20000000, 0x20000800, 0x00080810, 0x20080800,
299: 0x00080010, 0x00000000, 0x20000800, 0x20000000,
300: 0x00000800, 0x20080010, 0x00080000, 0x00080010,
301: 0x20080810, 0x00080800, 0x00000010, 0x20080810,
302: 0x00080800, 0x00080000, 0x20000810, 0x20000010,
303: 0x20080000, 0x00080810, 0x00000000, 0x00000800,
304: 0x20000010, 0x20000810, 0x20080800, 0x20080000,
305: 0x00000810, 0x00000010, 0x20080010, },
306: {
307: /* nibble 6 */
308: 0x00001000, 0x00000080, 0x00400080, 0x00400001, 0x00401081,
309: 0x00001001, 0x00001080, 0x00000000, 0x00400000,
310: 0x00400081, 0x00000081, 0x00401000, 0x00000001,
311: 0x00401080, 0x00401000, 0x00000081, 0x00400081,
312: 0x00001000, 0x00001001, 0x00401081, 0x00000000,
313: 0x00400080, 0x00400001, 0x00001080, 0x00401001,
314: 0x00001081, 0x00401080, 0x00000001, 0x00001081,
315: 0x00401001, 0x00000080, 0x00400000, 0x00001081,
316: 0x00401000, 0x00401001, 0x00000081, 0x00001000,
317: 0x00000080, 0x00400000, 0x00401001, 0x00400081,
318: 0x00001081, 0x00001080, 0x00000000, 0x00000080,
319: 0x00400001, 0x00000001, 0x00400080, 0x00000000,
320: 0x00400081, 0x00400080, 0x00001080, 0x00000081,
321: 0x00001000, 0x00401081, 0x00400000, 0x00401080,
322: 0x00000001, 0x00001001, 0x00401081, 0x00400001,
323: 0x00401080, 0x00401000, 0x00001001, },
324: {
325: /* nibble 7 */
326: 0x08200020, 0x08208000, 0x00008020, 0x00000000, 0x08008000,
327: 0x00200020, 0x08200000, 0x08208020, 0x00000020,
328: 0x08000000, 0x00208000, 0x00008020, 0x00208020,
329: 0x08008020, 0x08000020, 0x08200000, 0x00008000,
330: 0x00208020, 0x00200020, 0x08008000, 0x08208020,
331: 0x08000020, 0x00000000, 0x00208000, 0x08000000,
332: 0x00200000, 0x08008020, 0x08200020, 0x00200000,
333: 0x00008000, 0x08208000, 0x00000020, 0x00200000,
334: 0x00008000, 0x08000020, 0x08208020, 0x00008020,
335: 0x08000000, 0x00000000, 0x00208000, 0x08200020,
336: 0x08008020, 0x08008000, 0x00200020, 0x08208000,
337: 0x00000020, 0x00200020, 0x08008000, 0x08208020,
338: 0x00200000, 0x08200000, 0x08000020, 0x00208000,
339: 0x00008020, 0x08008020, 0x08200000, 0x00000020,
340: 0x08208000, 0x00208020, 0x00000000, 0x08000000,
341: 0x08200020, 0x00008000, 0x00208020 } };
342:
343: private static final int cov_2char[] = { 0x2E, 0x2F, 0x30, 0x31,
344: 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x41, 0x42,
345: 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
346: 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56,
347: 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
348: 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
349: 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A };
350:
351: private static final int byteToUnsigned(byte b) {
352: int value = (int) b;
353:
354: return (value >= 0 ? value : value + 256);
355: }
356:
357: private static int fourBytesToInt(byte b[], int offset) {
358: int value;
359:
360: value = byteToUnsigned(b[offset++]);
361: value |= (byteToUnsigned(b[offset++]) << 8);
362: value |= (byteToUnsigned(b[offset++]) << 16);
363: value |= (byteToUnsigned(b[offset++]) << 24);
364:
365: return (value);
366: }
367:
368: private static final void intToFourBytes(int iValue, byte b[],
369: int offset) {
370: b[offset++] = (byte) ((iValue) & 0xff);
371: b[offset++] = (byte) ((iValue >>> 8) & 0xff);
372: b[offset++] = (byte) ((iValue >>> 16) & 0xff);
373: b[offset++] = (byte) ((iValue >>> 24) & 0xff);
374: }
375:
376: private static final void PERM_OP(int a, int b, int n, int m,
377: int results[]) {
378: int t;
379:
380: t = ((a >>> n) ^ b) & m;
381: a ^= t << n;
382: b ^= t;
383:
384: results[0] = a;
385: results[1] = b;
386: }
387:
388: private static final int HPERM_OP(int a, int n, int m) {
389: int t;
390:
391: t = ((a << (16 - n)) ^ a) & m;
392: a = a ^ t ^ (t >>> (16 - n));
393:
394: return (a);
395: }
396:
397: private static int[] des_set_key(byte key[]) {
398: int schedule[] = new int[ITERATIONS * 2];
399:
400: int c = fourBytesToInt(key, 0);
401: int d = fourBytesToInt(key, 4);
402:
403: int results[] = new int[2];
404:
405: PERM_OP(d, c, 4, 0x0f0f0f0f, results);
406: d = results[0];
407: c = results[1];
408:
409: c = HPERM_OP(c, -2, 0xcccc0000);
410: d = HPERM_OP(d, -2, 0xcccc0000);
411:
412: PERM_OP(d, c, 1, 0x55555555, results);
413: d = results[0];
414: c = results[1];
415:
416: PERM_OP(c, d, 8, 0x00ff00ff, results);
417: c = results[0];
418: d = results[1];
419:
420: PERM_OP(d, c, 1, 0x55555555, results);
421: d = results[0];
422: c = results[1];
423:
424: d = (((d & 0x000000ff) << 16) | (d & 0x0000ff00)
425: | ((d & 0x00ff0000) >>> 16) | ((c & 0xf0000000) >>> 4));
426: c &= 0x0fffffff;
427:
428: int s, t;
429: int j = 0;
430:
431: for (int i = 0; i < ITERATIONS; i++) {
432: if (shifts2[i]) {
433: c = (c >>> 2) | (c << 26);
434: d = (d >>> 2) | (d << 26);
435: } else {
436: c = (c >>> 1) | (c << 27);
437: d = (d >>> 1) | (d << 27);
438: }
439:
440: c &= 0x0fffffff;
441: d &= 0x0fffffff;
442:
443: s = skb[0][(c) & 0x3f]
444: | skb[1][((c >>> 6) & 0x03) | ((c >>> 7) & 0x3c)]
445: | skb[2][((c >>> 13) & 0x0f) | ((c >>> 14) & 0x30)]
446: | skb[3][((c >>> 20) & 0x01) | ((c >>> 21) & 0x06)
447: | ((c >>> 22) & 0x38)];
448:
449: t = skb[4][(d) & 0x3f]
450: | skb[5][((d >>> 7) & 0x03) | ((d >>> 8) & 0x3c)]
451: | skb[6][(d >>> 15) & 0x3f]
452: | skb[7][((d >>> 21) & 0x0f) | ((d >>> 22) & 0x30)];
453:
454: schedule[j++] = ((t << 16) | (s & 0x0000ffff)) & 0xffffffff;
455: s = ((s >>> 16) | (t & 0xffff0000));
456:
457: s = (s << 4) | (s >>> 28);
458: schedule[j++] = s & 0xffffffff;
459: }
460: return (schedule);
461: }
462:
463: private static final int D_ENCRYPT(int L, int R, int S, int E0,
464: int E1, int s[]) {
465: int t, u, v;
466:
467: v = R ^ (R >>> 16);
468: u = v & E0;
469: v = v & E1;
470: u = (u ^ (u << 16)) ^ R ^ s[S];
471: t = (v ^ (v << 16)) ^ R ^ s[S + 1];
472: t = (t >>> 4) | (t << 28);
473:
474: L ^= SPtrans[1][(t) & 0x3f] | SPtrans[3][(t >>> 8) & 0x3f]
475: | SPtrans[5][(t >>> 16) & 0x3f]
476: | SPtrans[7][(t >>> 24) & 0x3f]
477: | SPtrans[0][(u) & 0x3f] | SPtrans[2][(u >>> 8) & 0x3f]
478: | SPtrans[4][(u >>> 16) & 0x3f]
479: | SPtrans[6][(u >>> 24) & 0x3f];
480:
481: return (L);
482: }
483:
484: private static final int[] body(int schedule[], int Eswap0,
485: int Eswap1) {
486: int left = 0;
487: int right = 0;
488: int t = 0;
489:
490: for (int j = 0; j < 25; j++) {
491: for (int i = 0; i < ITERATIONS * 2; i += 4) {
492: left = D_ENCRYPT(left, right, i, Eswap0, Eswap1,
493: schedule);
494: right = D_ENCRYPT(right, left, i + 2, Eswap0, Eswap1,
495: schedule);
496: }
497: t = left;
498: left = right;
499: right = t;
500: }
501:
502: t = right;
503:
504: right = (left >>> 1) | (left << 31);
505: left = (t >>> 1) | (t << 31);
506:
507: left &= 0xffffffff;
508: right &= 0xffffffff;
509:
510: int results[] = new int[2];
511:
512: PERM_OP(right, left, 1, 0x55555555, results);
513: right = results[0];
514: left = results[1];
515:
516: PERM_OP(left, right, 8, 0x00ff00ff, results);
517: left = results[0];
518: right = results[1];
519:
520: PERM_OP(right, left, 2, 0x33333333, results);
521: right = results[0];
522: left = results[1];
523:
524: PERM_OP(left, right, 16, 0x0000ffff, results);
525: left = results[0];
526: right = results[1];
527:
528: PERM_OP(right, left, 4, 0x0f0f0f0f, results);
529: right = results[0];
530: left = results[1];
531:
532: int out[] = new int[2];
533:
534: out[0] = left;
535: out[1] = right;
536:
537: return (out);
538: }
539:
540: public static final String crypt(String original) {
541: return crypt("", original);
542: }
543:
544: public static final String crypt(String salt, String original) {
545: if (debug) {
546: System.err.println("crypting..");
547: }
548:
549: while (salt.length() < 2) {
550: int index = (int) (randgen.nextFloat() * SALTCHARS.length());
551: salt += SALTCHARS.substring(index, index + 1);
552:
553: if (debug) {
554: System.err.println("looping..");
555: }
556: }
557:
558: if (debug) {
559: System.err.println("salt = " + salt + ", plaintext = "
560: + original);
561: }
562:
563: StringBuffer buffer = new StringBuffer(" ");
564:
565: char charZero = salt.charAt(0);
566: char charOne = salt.charAt(1);
567:
568: buffer.setCharAt(0, charZero);
569: buffer.setCharAt(1, charOne);
570:
571: int Eswap0 = con_salt[(int) charZero];
572: int Eswap1 = con_salt[(int) charOne] << 4;
573:
574: byte key[] = new byte[8];
575:
576: for (int i = 0; i < key.length; i++)
577: key[i] = (byte) 0;
578:
579: for (int i = 0; i < key.length && i < original.length(); i++) {
580: int iChar = (int) original.charAt(i);
581:
582: key[i] = (byte) (iChar << 1);
583: }
584:
585: int schedule[] = des_set_key(key);
586: int out[] = body(schedule, Eswap0, Eswap1);
587:
588: byte b[] = new byte[9];
589:
590: intToFourBytes(out[0], b, 0);
591: intToFourBytes(out[1], b, 4);
592: b[8] = 0;
593:
594: for (int i = 2, y = 0, u = 0x80; i < 13; i++) {
595: for (int j = 0, c = 0; j < 6; j++) {
596: c <<= 1;
597:
598: if (((int) b[y] & u) != 0)
599: c |= 1;
600:
601: u >>>= 1;
602:
603: if (u == 0) {
604: y++;
605: u = 0x80;
606: }
607: buffer.setCharAt(i, (char) cov_2char[c]);
608: }
609: }
610: return (buffer.toString());
611: }
612:
613: public static void main(String args[]) {
614: if (args.length >= 2) {
615: System.out.println("[" + args[0] + "] [" + args[1]
616: + "] => [" + jcrypt.crypt(args[0], args[1]) + "]");
617: }
618: }
619: }
|