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17 package org.apache.commons.codec.digest;
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19 import java.nio.charset.StandardCharsets;
20 import java.security.SecureRandom;
21 import java.util.Arrays;
22 import java.util.regex.Pattern;
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45 public class UnixCrypt {
46
47 private static final String CRYPT_SALT_REGEX = "^[" + B64.B64T_STRING + "]{2,}$";
48 private static final Pattern CRYPT_SALT_PATTERN = Pattern.compile(CRYPT_SALT_REGEX);
49
50 private static final int[] CON_SALT = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
51 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 5, 6,
52 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
53 34, 35, 36, 37, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53,
54 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 0, 0, 0, 0, 0 };
55
56 private static final int[] COV2CHAR = { 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 65, 66, 67, 68, 69, 70,
57 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 97, 98, 99, 100, 101, 102,
58 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122 };
59
60 private static final boolean[] SHIFT2 = { false, false, true, true, true, true, true, true, false, true, true,
61 true, true, true, true, false };
62
63 private static final int[][] SKB = {
64 { 0, 16, 0x20000000, 0x20000010, 0x10000, 0x10010, 0x20010000, 0x20010010, 2048, 2064, 0x20000800,
65 0x20000810, 0x10800, 0x10810, 0x20010800, 0x20010810, 32, 48, 0x20000020, 0x20000030, 0x10020,
66 0x10030, 0x20010020, 0x20010030, 2080, 2096, 0x20000820, 0x20000830, 0x10820, 0x10830, 0x20010820,
67 0x20010830, 0x80000, 0x80010, 0x20080000, 0x20080010, 0x90000, 0x90010, 0x20090000, 0x20090010,
68 0x80800, 0x80810, 0x20080800, 0x20080810, 0x90800, 0x90810, 0x20090800, 0x20090810, 0x80020,
69 0x80030, 0x20080020, 0x20080030, 0x90020, 0x90030, 0x20090020, 0x20090030, 0x80820, 0x80830,
70 0x20080820, 0x20080830, 0x90820, 0x90830, 0x20090820, 0x20090830 },
71 { 0, 0x2000000, 8192, 0x2002000, 0x200000, 0x2200000, 0x202000, 0x2202000, 4, 0x2000004, 8196, 0x2002004,
72 0x200004, 0x2200004, 0x202004, 0x2202004, 1024, 0x2000400, 9216, 0x2002400, 0x200400, 0x2200400,
73 0x202400, 0x2202400, 1028, 0x2000404, 9220, 0x2002404, 0x200404, 0x2200404, 0x202404, 0x2202404,
74 0x10000000, 0x12000000, 0x10002000, 0x12002000, 0x10200000, 0x12200000, 0x10202000, 0x12202000,
75 0x10000004, 0x12000004, 0x10002004, 0x12002004, 0x10200004, 0x12200004, 0x10202004, 0x12202004,
76 0x10000400, 0x12000400, 0x10002400, 0x12002400, 0x10200400, 0x12200400, 0x10202400, 0x12202400,
77 0x10000404, 0x12000404, 0x10002404, 0x12002404, 0x10200404, 0x12200404, 0x10202404, 0x12202404 },
78 { 0, 1, 0x40000, 0x40001, 0x1000000, 0x1000001, 0x1040000, 0x1040001, 2, 3, 0x40002, 0x40003, 0x1000002,
79 0x1000003, 0x1040002, 0x1040003, 512, 513, 0x40200, 0x40201, 0x1000200, 0x1000201, 0x1040200,
80 0x1040201, 514, 515, 0x40202, 0x40203, 0x1000202, 0x1000203, 0x1040202, 0x1040203, 0x8000000,
81 0x8000001, 0x8040000, 0x8040001, 0x9000000, 0x9000001, 0x9040000, 0x9040001, 0x8000002, 0x8000003,
82 0x8040002, 0x8040003, 0x9000002, 0x9000003, 0x9040002, 0x9040003, 0x8000200, 0x8000201, 0x8040200,
83 0x8040201, 0x9000200, 0x9000201, 0x9040200, 0x9040201, 0x8000202, 0x8000203, 0x8040202, 0x8040203,
84 0x9000202, 0x9000203, 0x9040202, 0x9040203 },
85 { 0, 0x100000, 256, 0x100100, 8, 0x100008, 264, 0x100108, 4096, 0x101000, 4352, 0x101100, 4104, 0x101008,
86 4360, 0x101108, 0x4000000, 0x4100000, 0x4000100, 0x4100100, 0x4000008, 0x4100008, 0x4000108,
87 0x4100108, 0x4001000, 0x4101000, 0x4001100, 0x4101100, 0x4001008, 0x4101008, 0x4001108, 0x4101108,
88 0x20000, 0x120000, 0x20100, 0x120100, 0x20008, 0x120008, 0x20108, 0x120108, 0x21000, 0x121000,
89 0x21100, 0x121100, 0x21008, 0x121008, 0x21108, 0x121108, 0x4020000, 0x4120000, 0x4020100,
90 0x4120100, 0x4020008, 0x4120008, 0x4020108, 0x4120108, 0x4021000, 0x4121000, 0x4021100, 0x4121100,
91 0x4021008, 0x4121008, 0x4021108, 0x4121108 },
92 { 0, 0x10000000, 0x10000, 0x10010000, 4, 0x10000004, 0x10004, 0x10010004, 0x20000000, 0x30000000,
93 0x20010000, 0x30010000, 0x20000004, 0x30000004, 0x20010004, 0x30010004, 0x100000, 0x10100000,
94 0x110000, 0x10110000, 0x100004, 0x10100004, 0x110004, 0x10110004, 0x20100000, 0x30100000,
95 0x20110000, 0x30110000, 0x20100004, 0x30100004, 0x20110004, 0x30110004, 4096, 0x10001000, 0x11000,
96 0x10011000, 4100, 0x10001004, 0x11004, 0x10011004, 0x20001000, 0x30001000, 0x20011000, 0x30011000,
97 0x20001004, 0x30001004, 0x20011004, 0x30011004, 0x101000, 0x10101000, 0x111000, 0x10111000,
98 0x101004, 0x10101004, 0x111004, 0x10111004, 0x20101000, 0x30101000, 0x20111000, 0x30111000,
99 0x20101004, 0x30101004, 0x20111004, 0x30111004 },
100 { 0, 0x8000000, 8, 0x8000008, 1024, 0x8000400, 1032, 0x8000408, 0x20000, 0x8020000, 0x20008, 0x8020008,
101 0x20400, 0x8020400, 0x20408, 0x8020408, 1, 0x8000001, 9, 0x8000009, 1025, 0x8000401, 1033,
102 0x8000409, 0x20001, 0x8020001, 0x20009, 0x8020009, 0x20401, 0x8020401, 0x20409, 0x8020409,
103 0x2000000, 0xa000000, 0x2000008, 0xa000008, 0x2000400, 0xa000400, 0x2000408, 0xa000408, 0x2020000,
104 0xa020000, 0x2020008, 0xa020008, 0x2020400, 0xa020400, 0x2020408, 0xa020408, 0x2000001, 0xa000001,
105 0x2000009, 0xa000009, 0x2000401, 0xa000401, 0x2000409, 0xa000409, 0x2020001, 0xa020001, 0x2020009,
106 0xa020009, 0x2020401, 0xa020401, 0x2020409, 0xa020409 },
107 { 0, 256, 0x80000, 0x80100, 0x1000000, 0x1000100, 0x1080000, 0x1080100, 16, 272, 0x80010, 0x80110,
108 0x1000010, 0x1000110, 0x1080010, 0x1080110, 0x200000, 0x200100, 0x280000, 0x280100, 0x1200000,
109 0x1200100, 0x1280000, 0x1280100, 0x200010, 0x200110, 0x280010, 0x280110, 0x1200010, 0x1200110,
110 0x1280010, 0x1280110, 512, 768, 0x80200, 0x80300, 0x1000200, 0x1000300, 0x1080200, 0x1080300, 528,
111 784, 0x80210, 0x80310, 0x1000210, 0x1000310, 0x1080210, 0x1080310, 0x200200, 0x200300, 0x280200,
112 0x280300, 0x1200200, 0x1200300, 0x1280200, 0x1280300, 0x200210, 0x200310, 0x280210, 0x280310,
113 0x1200210, 0x1200310, 0x1280210, 0x1280310 },
114 { 0, 0x4000000, 0x40000, 0x4040000, 2, 0x4000002, 0x40002, 0x4040002, 8192, 0x4002000, 0x42000, 0x4042000,
115 8194, 0x4002002, 0x42002, 0x4042002, 32, 0x4000020, 0x40020, 0x4040020, 34, 0x4000022, 0x40022,
116 0x4040022, 8224, 0x4002020, 0x42020, 0x4042020, 8226, 0x4002022, 0x42022, 0x4042022, 2048,
117 0x4000800, 0x40800, 0x4040800, 2050, 0x4000802, 0x40802, 0x4040802, 10240, 0x4002800, 0x42800,
118 0x4042800, 10242, 0x4002802, 0x42802, 0x4042802, 2080, 0x4000820, 0x40820, 0x4040820, 2082,
119 0x4000822, 0x40822, 0x4040822, 10272, 0x4002820, 0x42820, 0x4042820, 10274, 0x4002822, 0x42822,
120 0x4042822 } };
121
122 private static final int[][] SPTRANS = {
123 { 0x820200, 0x20000, 0x80800000, 0x80820200, 0x800000, 0x80020200, 0x80020000, 0x80800000, 0x80020200,
124 0x820200, 0x820000, 0x80000200, 0x80800200, 0x800000, 0, 0x80020000, 0x20000, 0x80000000,
125 0x800200, 0x20200, 0x80820200, 0x820000, 0x80000200, 0x800200, 0x80000000, 512, 0x20200,
126 0x80820000, 512, 0x80800200, 0x80820000, 0, 0, 0x80820200, 0x800200, 0x80020000, 0x820200,
127 0x20000, 0x80000200, 0x800200, 0x80820000, 512, 0x20200, 0x80800000, 0x80020200, 0x80000000,
128 0x80800000, 0x820000, 0x80820200, 0x20200, 0x820000, 0x80800200, 0x800000, 0x80000200, 0x80020000,
129 0, 0x20000, 0x800000, 0x80800200, 0x820200, 0x80000000, 0x80820000, 512, 0x80020200 },
130 { 0x10042004, 0, 0x42000, 0x10040000, 0x10000004, 8196, 0x10002000, 0x42000, 8192, 0x10040004, 4,
131 0x10002000, 0x40004, 0x10042000, 0x10040000, 4, 0x40000, 0x10002004, 0x10040004, 8192, 0x42004,
132 0x10000000, 0, 0x40004, 0x10002004, 0x42004, 0x10042000, 0x10000004, 0x10000000, 0x40000, 8196,
133 0x10042004, 0x40004, 0x10042000, 0x10002000, 0x42004, 0x10042004, 0x40004, 0x10000004, 0,
134 0x10000000, 8196, 0x40000, 0x10040004, 8192, 0x10000000, 0x42004, 0x10002004, 0x10042000, 8192, 0,
135 0x10000004, 4, 0x10042004, 0x42000, 0x10040000, 0x10040004, 0x40000, 8196, 0x10002000, 0x10002004,
136 4, 0x10040000, 0x42000 },
137 { 0x41000000, 0x1010040, 64, 0x41000040, 0x40010000, 0x1000000, 0x41000040, 0x10040, 0x1000040, 0x10000,
138 0x1010000, 0x40000000, 0x41010040, 0x40000040, 0x40000000, 0x41010000, 0, 0x40010000, 0x1010040,
139 64, 0x40000040, 0x41010040, 0x10000, 0x41000000, 0x41010000, 0x1000040, 0x40010040, 0x1010000,
140 0x10040, 0, 0x1000000, 0x40010040, 0x1010040, 64, 0x40000000, 0x10000, 0x40000040, 0x40010000,
141 0x1010000, 0x41000040, 0, 0x1010040, 0x10040, 0x41010000, 0x40010000, 0x1000000, 0x41010040,
142 0x40000000, 0x40010040, 0x41000000, 0x1000000, 0x41010040, 0x10000, 0x1000040, 0x41000040,
143 0x10040, 0x1000040, 0, 0x41010000, 0x40000040, 0x41000000, 0x40010040, 64, 0x1010000 },
144 { 0x100402, 0x4000400, 2, 0x4100402, 0, 0x4100000, 0x4000402, 0x100002, 0x4100400, 0x4000002, 0x4000000,
145 1026, 0x4000002, 0x100402, 0x100000, 0x4000000, 0x4100002, 0x100400, 1024, 2, 0x100400, 0x4000402,
146 0x4100000, 1024, 1026, 0, 0x100002, 0x4100400, 0x4000400, 0x4100002, 0x4100402, 0x100000,
147 0x4100002, 1026, 0x100000, 0x4000002, 0x100400, 0x4000400, 2, 0x4100000, 0x4000402, 0, 1024,
148 0x100002, 0, 0x4100002, 0x4100400, 1024, 0x4000000, 0x4100402, 0x100402, 0x100000, 0x4100402, 2,
149 0x4000400, 0x100402, 0x100002, 0x100400, 0x4100000, 0x4000402, 1026, 0x4000000, 0x4000002,
150 0x4100400 },
151 { 0x2000000, 16384, 256, 0x2004108, 0x2004008, 0x2000100, 16648, 0x2004000, 16384, 8, 0x2000008, 16640,
152 0x2000108, 0x2004008, 0x2004100, 0, 16640, 0x2000000, 16392, 264, 0x2000100, 16648, 0, 0x2000008,
153 8, 0x2000108, 0x2004108, 16392, 0x2004000, 256, 264, 0x2004100, 0x2004100, 0x2000108, 16392,
154 0x2004000, 16384, 8, 0x2000008, 0x2000100, 0x2000000, 16640, 0x2004108, 0, 16648, 0x2000000, 256,
155 16392, 0x2000108, 256, 0, 0x2004108, 0x2004008, 0x2004100, 264, 16384, 16640, 0x2004008,
156 0x2000100, 264, 8, 16648, 0x2004000, 0x2000008 },
157 { 0x20000010, 0x80010, 0, 0x20080800, 0x80010, 2048, 0x20000810, 0x80000, 2064, 0x20080810, 0x80800,
158 0x20000000, 0x20000800, 0x20000010, 0x20080000, 0x80810, 0x80000, 0x20000810, 0x20080010, 0, 2048,
159 16, 0x20080800, 0x20080010, 0x20080810, 0x20080000, 0x20000000, 2064, 16, 0x80800, 0x80810,
160 0x20000800, 2064, 0x20000000, 0x20000800, 0x80810, 0x20080800, 0x80010, 0, 0x20000800, 0x20000000,
161 2048, 0x20080010, 0x80000, 0x80010, 0x20080810, 0x80800, 16, 0x20080810, 0x80800, 0x80000,
162 0x20000810, 0x20000010, 0x20080000, 0x80810, 0, 2048, 0x20000010, 0x20000810, 0x20080800,
163 0x20080000, 2064, 16, 0x20080010 },
164 { 4096, 128, 0x400080, 0x400001, 0x401081, 4097, 4224, 0, 0x400000, 0x400081, 129, 0x401000, 1, 0x401080,
165 0x401000, 129, 0x400081, 4096, 4097, 0x401081, 0, 0x400080, 0x400001, 4224, 0x401001, 4225,
166 0x401080, 1, 4225, 0x401001, 128, 0x400000, 4225, 0x401000, 0x401001, 129, 4096, 128, 0x400000,
167 0x401001, 0x400081, 4225, 4224, 0, 128, 0x400001, 1, 0x400080, 0, 0x400081, 0x400080, 4224, 129,
168 4096, 0x401081, 0x400000, 0x401080, 1, 4097, 0x401081, 0x400001, 0x401080, 0x401000, 4097 },
169 { 0x8200020, 0x8208000, 32800, 0, 0x8008000, 0x200020, 0x8200000, 0x8208020, 32, 0x8000000, 0x208000,
170 32800, 0x208020, 0x8008020, 0x8000020, 0x8200000, 32768, 0x208020, 0x200020, 0x8008000, 0x8208020,
171 0x8000020, 0, 0x208000, 0x8000000, 0x200000, 0x8008020, 0x8200020, 0x200000, 32768, 0x8208000, 32,
172 0x200000, 32768, 0x8000020, 0x8208020, 32800, 0x8000000, 0, 0x208000, 0x8200020, 0x8008020,
173 0x8008000, 0x200020, 0x8208000, 32, 0x200020, 0x8008000, 0x8208020, 0x200000, 0x8200000,
174 0x8000020, 0x208000, 32800, 0x8008020, 0x8200000, 32, 0x8208000, 0x208020, 0, 0x8000000,
175 0x8200020, 32768, 0x208020 } };
176
177 private static int[] body(final int[] schedule, final int eSwap0, final int eSwap1) {
178 int left = 0;
179 int right = 0;
180 int t = 0;
181 for (int j = 0; j < 25; j++) {
182 for (int i = 0; i < 32; i += 4) {
183 left = dEncrypt(left, right, i, eSwap0, eSwap1, schedule);
184 right = dEncrypt(right, left, i + 2, eSwap0, eSwap1, schedule);
185 }
186 t = left;
187 left = right;
188 right = t;
189 }
190
191 t = right;
192 right = left >>> 1 | left << 31;
193 left = t >>> 1 | t << 31;
194 final int[] results = new int[2];
195 permOp(right, left, 1, 0x55555555, results);
196 right = results[0];
197 left = results[1];
198 permOp(left, right, 8, 0xff00ff, results);
199 left = results[0];
200 right = results[1];
201 permOp(right, left, 2, 0x33333333, results);
202 right = results[0];
203 left = results[1];
204 permOp(left, right, 16, 65535, results);
205 left = results[0];
206 right = results[1];
207 permOp(right, left, 4, 0xf0f0f0f, results);
208 right = results[0];
209 left = results[1];
210 final int[] out = new int[2];
211 out[0] = left;
212 out[1] = right;
213 return out;
214 }
215
216 private static int byteToUnsigned(final byte b) {
217 return b & 0xff;
218 }
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228
229
230 public static String crypt(final byte[] original) {
231 return crypt(original, null);
232 }
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245
246 public static String crypt(final byte[] original, String salt) {
247 if (salt == null) {
248 salt = B64.getRandomSalt(2);
249 } else if (!CRYPT_SALT_PATTERN.matcher(salt).matches()) {
250 throw new IllegalArgumentException("Invalid salt value: " + salt);
251 }
252
253 final StringBuilder buffer = new StringBuilder(" ");
254 final char charZero = salt.charAt(0);
255 final char charOne = salt.charAt(1);
256 buffer.setCharAt(0, charZero);
257 buffer.setCharAt(1, charOne);
258 final int eSwap0 = CON_SALT[charZero];
259 final int eSwap1 = CON_SALT[charOne] << 4;
260 final byte[] key = new byte[8];
261 Arrays.fill(key, (byte) 0);
262
263 final int originalLength = original.length;
264 for (int i = 0; i < key.length && i < originalLength; i++) {
265 final int iChar = original[i];
266 key[i] = (byte) (iChar << 1);
267 }
268
269 final int[] schedule = desSetKey(key);
270 final int[] out = body(schedule, eSwap0, eSwap1);
271 final byte[] b = new byte[9];
272 intToFourBytes(out[0], b, 0);
273 intToFourBytes(out[1], b, 4);
274 b[8] = 0;
275 int i = 2;
276 int y = 0;
277 int u = 128;
278 for (; i < 13; i++) {
279 int j = 0;
280 int c = 0;
281 for (; j < 6; j++) {
282 c <<= 1;
283 if ((b[y] & u) != 0) {
284 c |= 0x1;
285 }
286 u >>>= 1;
287 if (u == 0) {
288 y++;
289 u = 128;
290 }
291 buffer.setCharAt(i, (char) COV2CHAR[c]);
292 }
293 }
294 return buffer.toString();
295 }
296
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306
307 public static String crypt(final String original) {
308 return crypt(original.getBytes(StandardCharsets.UTF_8));
309 }
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319
320 public static String crypt(final String original, final String salt) {
321 return crypt(original.getBytes(StandardCharsets.UTF_8), salt);
322 }
323
324 private static int dEncrypt(int el, final int r, final int s, final int e0, final int e1, final int[] sArr) {
325 int v = r ^ r >>> 16;
326 int u = v & e0;
327 v &= e1;
328 u = u ^ u << 16 ^ r ^ sArr[s];
329 int t = v ^ v << 16 ^ r ^ sArr[s + 1];
330 t = t >>> 4 | t << 28;
331 el ^= SPTRANS[1][t & 0x3f] | SPTRANS[3][t >>> 8 & 0x3f] | SPTRANS[5][t >>> 16 & 0x3f] |
332 SPTRANS[7][t >>> 24 & 0x3f] | SPTRANS[0][u & 0x3f] | SPTRANS[2][u >>> 8 & 0x3f] |
333 SPTRANS[4][u >>> 16 & 0x3f] | SPTRANS[6][u >>> 24 & 0x3f];
334 return el;
335 }
336
337 private static int[] desSetKey(final byte[] key) {
338 final int[] schedule = new int[32];
339 int c = fourBytesToInt(key, 0);
340 int d = fourBytesToInt(key, 4);
341 final int[] results = new int[2];
342 permOp(d, c, 4, 0xf0f0f0f, results);
343 d = results[0];
344 c = results[1];
345 c = hPermOp(c, -2, 0xcccc0000);
346 d = hPermOp(d, -2, 0xcccc0000);
347 permOp(d, c, 1, 0x55555555, results);
348 d = results[0];
349 c = results[1];
350 permOp(c, d, 8, 0xff00ff, results);
351 c = results[0];
352 d = results[1];
353 permOp(d, c, 1, 0x55555555, results);
354 d = results[0];
355 c = results[1];
356 d = (d & 0xff) << 16 | d & 0xff00 | (d & 0xff0000) >>> 16 | (c & 0xf0000000) >>> 4;
357 c &= 0xfffffff;
358 int j = 0;
359 for (int i = 0; i < 16; i++) {
360 if (SHIFT2[i]) {
361 c = c >>> 2 | c << 26;
362 d = d >>> 2 | d << 26;
363 } else {
364 c = c >>> 1 | c << 27;
365 d = d >>> 1 | d << 27;
366 }
367 c &= 0xfffffff;
368 d &= 0xfffffff;
369 int s = SKB[0][c & 0x3f] | SKB[1][c >>> 6 & 0x3 | c >>> 7 & 0x3c] |
370 SKB[2][c >>> 13 & 0xf | c >>> 14 & 0x30] |
371 SKB[3][c >>> 20 & 0x1 | c >>> 21 & 0x6 | c >>> 22 & 0x38];
372 final int t = SKB[4][d & 0x3f] | SKB[5][d >>> 7 & 0x3 | d >>> 8 & 0x3c] | SKB[6][d >>> 15 & 0x3f] |
373 SKB[7][d >>> 21 & 0xf | d >>> 22 & 0x30];
374 schedule[j++] = t << 16 | s & 0xffff;
375 s = s >>> 16 | t & 0xffff0000;
376 s = s << 4 | s >>> 28;
377 schedule[j++] = s;
378 }
379
380 return schedule;
381 }
382
383 private static int fourBytesToInt(final byte[] b, int offset) {
384 int value = byteToUnsigned(b[offset++]);
385 value |= byteToUnsigned(b[offset++]) << 8;
386 value |= byteToUnsigned(b[offset++]) << 16;
387 value |= byteToUnsigned(b[offset++]) << 24;
388 return value;
389 }
390
391 private static int hPermOp(final int a, final int n, final int m) {
392 final int t = (a << 16 - n ^ a) & m;
393 return a ^ t ^ t >>> 16 - n;
394 }
395
396 private static void intToFourBytes(final int iValue, final byte[] b, int offset) {
397 b[offset++] = (byte) (iValue & 0xff);
398 b[offset++] = (byte) (iValue >>> 8 & 0xff);
399 b[offset++] = (byte) (iValue >>> 16 & 0xff);
400 b[offset++] = (byte) (iValue >>> 24 & 0xff);
401 }
402
403 private static void permOp(int a, int b, final int n, final int m, final int[] results) {
404 final int t = (a >>> n ^ b) & m;
405 a ^= t << n;
406 b ^= t;
407 results[0] = a;
408 results[1] = b;
409 }
410
411
412
413
414
415
416 @Deprecated
417 public UnixCrypt() {
418
419 }
420 }