001: /* $Id: Blowfish.java,v 1.1 2004/01/19 02:03:50 rgrimm Exp $
002: *
003: * Ported to Java from the C-code reference implementation --part of
004: * the SSL implementation 0.6.6-- written by Eric Young (eay@mincom.oz.au).
005: *
006: * Copyright (C) 1995-2000 The Cryptix Foundation Limited.
007: * All rights reserved.
008: *
009: * Use, modification, copying and distribution of this software is subject
010: * the terms and conditions of the Cryptix General Licence. You should have
011: * received a copy of the Cryptix General Licence along with this library;
012: * if not, you can download a copy from http://www.cryptix.org/ .
013: */
014: package cryptix.jce.provider.cipher;
015:
016: import java.security.InvalidKeyException;
017: import java.security.Key;
018:
019: /**
020: * This class implements the Blowfish algorithm (standard, 16 round version).
021: * Blowfish is a symmetric block cipher, with a 64-bit blocksize and a variable
022: * key length (between 40 and 448 bits inclusive, in 8-bit increments).
023: * <p>
024: * References:<br>
025: * <ul>
026: * <li>Bruce Schneier,
027: * "Section 14.3 Blowfish,"
028: * Applied Cryptography, 2nd edition,
029: * John Wiley & Sons, 1996</li>
030: *
031: * <li>Bruce Schneier,
032: * <a href="http://www.counterpane.com/bfsverlag.html">
033: * Description of a New Variable-Length Key, 64-Bit Cipher (Blowfish)</a>,
034: * Fast Software Encryption Cambridge Security Workshop Proceedings,
035: * Springer-Verlag, 1004, pp 191-204.</li>
036: *
037: * <li><a href="http://www.counterpane.com/blowfish.html">
038: * http://www.counterpane.com/blowfish.html</a></li>
039: * </ul>
040: * <p>
041: * The implementation is heavily optimized (but we can still do better):<br>
042: * <ul>
043: * <li>The P-box and S-box data is encoded in a string to save on
044: * .class-file size</li>
045: * <li>P-box entries are stored in individual integers Pxx</li>
046: * <li>The loops have been unrolled
047: * <li>Encryption & decryption use the same algorithm</li>
048: * </ul>
049: * <p>
050: * Speed optimizations thanks to Peter Hjelt <mxv@iterate.com>.
051: * Additional speed and size optimizations by gelderen <gelderen@cryptix.org>.
052: *
053: * @version $Revision: 1.1 $
054: * @author Systemics Ltd.
055: * @author David Hopwood
056: * @author Jeroen C. van Gelderen (gelderen@cryptix.org)
057: * @author Raif S. Naffah (raif@cryptix.org)
058: */
059: public final class Blowfish extends BlockCipher {
060:
061: // Static variables and constants
062: // ...................................................................
063:
064: /** Compressed initial values for the P-box and S-boxes */
065: private static final String cP = "$?j\u0088\u0085\u00A3\u0008\u00D3\u0013\u0019\u008A.\u0003psD"
066: + "\u00A4\u00098\")\u009F1\u00D0\u0008.\u00FA\u0098\u00ECNl\u0089"
067: + "E(!\u00E68\u00D0\u0013w\u00BETf\u00CF4\u00E9\u000Cl\u00C0\u00AC"
068: + ")\u00B7\u00C9|P\u00DD?\u0084\u00D5\u00B5\u00B5G\u0009\u0017\u0092"
069: + "\u0016\u00D5\u00D9\u0089y\u00FB\u001B",
070: cS = "\u00D11\u000B\u00A6\u0098\u00DF\u00B5\u00AC/\u00FDr\u00DB\u00D0"
071: + "\u001A\u00DF\u00B7\u00B8\u00E1\u00AF\u00EDj&~\u0096\u00BA|\u0090E"
072: + "\u00F1,\u007F\u0099$\u00A1\u0099G\u00B3\u0091l\u00F7\u0008\u0001"
073: + "\u00F2\u00E2\u0085\u008E\u00FC\u0016ci \u00D8qWNi\u00A4X\u00FE"
074: + "\u00A3\u00F4\u0093=~\r\u0095t\u008Fr\u008E\u00B6Xq\u008B\u00CDX"
075: + "\u0082\u0015J\u00EE{T\u00A4\u001D\u00C2ZY\u00B5\u009C0\u00D59*\u00F2"
076: + "`\u0013\u00C5\u00D1\u00B0#(`\u0085\u00F0\u00CAAy\u0018\u00B8\u00DB8"
077: + "\u00EF\u008Ey\u00DC\u00B0`:\u0018\u000El\u009E\u000E\u008B\u00B0"
078: + "\u001E\u008A>\u00D7\u0015w\u00C1\u00BD1K'x\u00AF/\u00DAU`\\`\u00E6"
079: + "U%\u00F3\u00AAU\u00AB\u0094WH\u0098bc\u00E8\u0014@U\u00CA9j*\u00AB"
080: + "\u0010\u00B6\u00B4\u00CC\\4\u0011A\u00E8\u00CE\u00A1T\u0086\u00AF|r"
081: + "\u00E9\u0093\u00B3\u00EE\u0014\u0011co\u00BC*+\u00A9\u00C5]t\u00181"
082: + "\u00F6\u00CE\\>\u0016\u009B\u0087\u0093\u001E\u00AF\u00D6\u00BA3l$"
083: + "\u00CF\\z2S\u0081(\u0095\u0086w;\u008FH\u0098kK\u00B9\u00AF\u00C4"
084: + "\u00BF\u00E8\u001Bf(!\u0093a\u00D8\t\u00CC\u00FB!\u00A9\u0091H|"
085: + "\u00AC`]\u00EC\u00802\u00EF\u0084]]\u00E9\u0085u\u00B1\u00DC&#\u0002"
086: + "\u00EBe\u001B\u0088#\u0089>\u0081\u00D3\u0096\u00AC\u00C5\u000Fmo"
087: + "\u00F3\u0083\u00F4B9.\u000BD\u0082\u00A4\u0084 \u0004i\u00C8\u00F0J"
088: + "\u009E\u001F\u009B^!\u00C6hB\u00F6\u00E9l\u009Ag\u000C\u009Ca\u00AB"
089: + "\u00D3\u0088\u00F0jQ\u00A0\u00D2\u00D8T/h\u0096\u000F\u00A7(\u00ABQ3"
090: + "\u00A3n\u00EF\u000Bl\u0013z;\u00E4\u00BA;\u00F0P~\u00FB*\u0098\u00A1"
091: + "\u00F1e\u001D9\u00AF\u0001vf\u00CAY>\u0082C\u000E\u0088\u008C\u00EE"
092: + "\u0086\u0019Eo\u009F\u00B4}\u0084\u00A5\u00C3;\u008B^\u00BE\u00E0ou"
093: + "\u00D8\u0085\u00C1 s@\u001AD\u009FV\u00C1j\u00A6N\u00D3\u00AAb6?w"
094: + "\u0006\u001B\u00FE\u00DFrB\u009B\u0002=7\u00D0\u00D7$\u00D0\n\u0012H"
095: + "\u00DB\u000F\u00EA\u00D3I\u00F1\u00C0\u009B\u0007Sr\u00C9\u0080"
096: + "\u0099\u001B{%\u00D4y\u00D8\u00F6\u00E8\u00DE\u00F7\u00E3\u00FEP"
097: + "\u001A\u00B6yL;\u0097l\u00E0\u00BD\u0004\u00C0\u0006\u00BA\u00C1"
098: + "\u00A9O\u00B6@\u009F`\u00C4^\\\u009E\u00C2\u0019j$ch\u00FBo\u00AF>lS"
099: + "\u00B5\u00139\u00B2\u00EB;R\u00ECom\u00FCQ\u001F\u009B0\u0095,\u00CC"
100: + "\u0081ED\u00AF^\u00BD\t\u00BE\u00E3\u00D0\u0004\u00DE3J\u00FDf\u000F"
101: + "(\u0007\u0019.K\u00B3\u00C0\u00CB\u00A8WE\u00C8t\u000F\u00D2\u000B_9"
102: + "\u00B9\u00D3\u00FB\u00DBUy\u00C0\u00BD\u001A`2\n\u00D6\u00A1\u0000"
103: + "\u00C6@,ryg\u009F%\u00FE\u00FB\u001F\u00A3\u00CC\u008E\u00A5\u00E9"
104: + "\u00F8\u00DB2\"\u00F8<u\u0016\u00DF\u00FDak\u0015/P\u001E\u00C8"
105: + "\u00AD\u0005R\u00AB2=\u00B5\u00FA\u00FD#\u0087`S1{H>\u0000\u00DF"
106: + "\u0082\u009E\\W\u00BB\u00CAo\u008C\u00A0\u001A\u0087V.\u00DF\u0017i"
107: + "\u00DB\u00D5B\u00A8\u00F6(~\u00FF\u00C3\u00ACg2\u00C6\u008COUsi['"
108: + "\u00B0\u00BB\u00CAX\u00C8\u00E1\u00FF\u00A3]\u00B8\u00F0\u0011\u00A0"
109: + "\u0010\u00FA=\u0098\u00FD!\u0083\u00B8J\u00FC\u00B5l-\u00D1\u00D3["
110: + "\u009AS\u00E4y\u00B6\u00F8Ee\u00D2\u008EI\u00BCK\u00FB\u0097\u0090"
111: + "\u00E1\u00DD\u00F2\u00DA\u00A4\u00CB~3b\u00FB\u0013A\u00CE\u00E4"
112: + "\u00C6\u00E8\u00EF \u00CA\u00DA6wL\u0001\u00D0~\u009E\u00FE+\u00F1"
113: + "\u001F\u00B4\u0095\u00DB\u00DAM\u00AE\u0090\u0091\u0098\u00EA\u00AD"
114: + "\u008Eqk\u0093\u00D5\u00A0\u00D0\u008E\u00D1\u00D0\u00AF\u00C7%"
115: + "\u00E0\u008E<[/\u008Eu\u0094\u00B7\u008F\u00F6\u00E2\u00FB\u00F2"
116: + "\u0012+d\u0088\u0088\u00B8\u0012\u0090\r\u00F0\u001CO\u00AD^\u00A0h"
117: + "\u008F\u00C3\u001C\u00D1\u00CF\u00F1\u0091\u00B3\u00A8\u00C1\u00AD//"
118: + "\"\u0018\u00BE\u000E\u0017w\u00EAu-\u00FE\u008B\u0002\u001F\u00A1"
119: + "\u00E5\u00A0\u00CC\u000F\u00B5ot\u00E8\u0018\u00AC\u00F3\u00D6\u00CE"
120: + "\u0089\u00E2\u0099\u00B4\u00A8O\u00E0\u00FD\u0013\u00E0\u00B7|\u00C4"
121: + ";\u0081\u00D2\u00AD\u00A8\u00D9\u0016_\u00A2f\u0080\u0095w\u0005"
122: + "\u0093\u00CCs\u0014!\u001A\u0014w\u00E6\u00AD ew\u00B5\u00FA\u0086"
123: + "\u00C7TB\u00F5\u00FB\u009D5\u00CF\u00EB\u00CD\u00AF\u000C{>\u0089"
124: + "\u00A0\u00D6A\u001B\u00D3\u00AE\u001E~I\u0000%\u000E- q\u00B3^\"h"
125: + "\u0000\u00BBW\u00B8\u00E0\u00AF$d6\u009B\u00F0\t\u00B9\u001EUc\u0091"
126: + "\u001DY\u00DF\u00A6\u00AAx\u00C1C\u0089\u00D9ZS\u007F }[\u00A2\u0002"
127: + "\u00E5\u00B9\u00C5\u0083&\u0003vb\u0095\u00CF\u00A9\u0011\u00C8"
128: + "\u0019hNsJA\u00B3G-\u00CA{\u0014\u00A9J\u001BQ\u0000R\u009AS)\u0015"
129: + "\u00D6\u000FW?\u00BC\u009B\u00C6\u00E4+`\u00A4v\u0081\u00E6t\u0000"
130: + "\u0008\u00BAo\u00B5W\u001B\u00E9\u001F\u00F2\u0096\u00ECk*\r\u00D9"
131: + "\u0015\u00B6ce!\u00E7\u00B9\u00F9\u00B6\u00FF4\u0005.\u00C5\u0085VdS"
132: + "\u00B0-]\u00A9\u009F\u008F\u00A1\u0008\u00BAG\u0099n\u0085\u0007j"
133: + "Kzp\u00E9\u00B5\u00B3)D\u00DBu\t.\u00C4\u0019&#\u00ADn\u00A6\u00B0"
134: + "I\u00A7\u00DF}\u009C\u00EE`\u00B8\u008F\u00ED\u00B2f\u00EC\u00AA"
135: + "\u008Cqi\u009A\u0017\u00FFVdRl\u00C2\u00B1\u009E\u00E1\u00196\u0002"
136: + "\u00A5u\tL)\u00A0Y\u0013@\u00E4\u0018:>?T\u0098\u009A[B\u009Dek"
137: + "\u008F\u00E4\u00D6\u0099\u00F7?\u00D6\u00A1\u00D2\u009C\u0007\u00EF"
138: + "\u00E80\u00F5M-8\u00E6\u00F0%]\u00C1L\u00DD \u0086\u0084p\u00EB&c"
139: + "\u0082\u00E9\u00C6\u0002\u001E\u00CC^\thk?>\u00BA\u00EF\u00C9<\u0097"
140: + "\u0018\u0014kjp\u00A1h\u007F5\u0084R\u00A0\u00E2\u0086\u00B7\u009CS"
141: + "\u0005\u00AAP\u00077>\u0007\u0084\u001C\u007F\u00DE\u00AE\\\u008E}D"
142: + "\u00ECW\u0016\u00F2\u00B8\u00B0:\u00DA7\u00F0P\u000C\r\u00F0\u001C"
143: + "\u001F\u0004\u0002\u0000\u00B3\u00FF\u00AE\u000C\u00F5\u001A<\u00B5t"
144: + "\u00B2%\u0083zX\u00DC\t!\u00BD\u00D1\u0091\u0013\u00F9|\u00A9/\u00F6"
145: + "\u00942Gs\"\u00F5G\u0001:\u00E5\u00E5\u00817\u00C2\u00DA\u00DC\u00C8"
146: + "\u00B5v4\u009A\u00F3\u00DD\u00A7\u00A9DaF\u000F\u00D0\u0003\u000E"
147: + "\u00EC\u00C8\u00C7>\u00A4u\u001EA\u00E28\u00CD\u0099;\u00EA\u000E/"
148: + "2\u0080\u00BB\u00A1\u0018>\u00B31NT\u008B8Om\u00B9\u0008oB\r\u0003"
149: + "\u00F6\n\u0004\u00BF,\u00B8\u0012\u0090$\u0097|yVy\u00B0r\u00BC"
150: + "\u00AF\u0089\u00AF\u00DE\u009Aw\u001F\u00D9\u0093\u0008\u0010\u00B3"
151: + "\u008B\u00AE\u0012\u00DC\u00CF?.U\u0012r\u001F.kq$P\u001A\u00DD"
152: + "\u00E6\u009F\u0084\u00CD\u0087zXG\u0018t\u0008\u00DA\u0017\u00BC"
153: + "\u009F\u009A\u00BC\u00E9K}\u008C\u00ECz\u00EC:\u00DB\u0085\u001D"
154: + "\u00FAc\tCf\u00C4d\u00C3\u00D2\u00EF\u001C\u0018G2\u0015\u00D9\u0008"
155: + "\u00DDC;7$\u00C2\u00BA\u0016\u0012\u00A1MC*e\u00C4QP\u0094\u0000"
156: + "\u0002\u0013:\u00E4\u00DDq\u00DF\u00F8\u009E\u00101NU\u0081\u00ACw"
157: + "\u00D6_\u0011\u0019\u009B\u00045V\u00F1\u00D7\u00A3\u00C7k<\u0011"
158: + "\u0018;Y$\u00A5\t\u00F2\u008F\u00E6\u00ED\u0097\u00F1\u00FB\u00FA"
159: + "\u009E\u00BA\u00BF,\u001E\u0015<n\u0086\u00E3Ep\u00EA\u00E9o\u00B1"
160: + "\u0086\u000E^\nZ>*\u00B3w\u001F\u00E7\u001CN=\u0006\u00FA)e\u00DC"
161: + "\u00B9\u0099\u00E7\u001D\u000F\u0080>\u0089\u00D6Rf\u00C8%.L\u00C9x"
162: + "\u009C\u0010\u00B3j\u00C6\u0015\u000E\u00BA\u0094\u00E2\u00EAx\u00A5"
163: + "\u00FC<S\u001E\n-\u00F4\u00F2\u00F7N\u00A76\u001D+=\u00199&\u000F"
164: + "\u0019\u00C2y`R#\u00A7\u0008\u00F7\u0013\u0012\u00B6\u00EB\u00AD"
165: + "\u00FEn\u00EA\u00C3\u001Ff\u00E3\u00BCE\u0095\u00A6{\u00C8\u0083"
166: + "\u00B1\u007F7\u00D1\u0001\u008C\u00FF(\u00C32\u00DD\u00EF\u00BElZ"
167: + "\u00A5eX!\u0085h\u00AB\u0098\u0002\u00EE\u00CE\u00A5\u000F\u00DB/"
168: + "\u0095;*\u00EF}\u00AD[n/\u0084\u0015!\u00B6()\u0007ap\u00EC\u00DDGu"
169: + "a\u009F\u0015\u0010\u0013\u00CC\u00A80\u00EBa\u00BD\u0096\u00034"
170: + "\u00FE\u001E\u00AA\u0003c\u00CF\u00B5s\\\u0090Lp\u00A29\u00D5\u009E"
171: + "\u009E\u000B\u00CB\u00AA\u00DE\u0014\u00EE\u00CC\u0086\u00BC`b,"
172: + "\u00A7\u009C\u00AB\\\u00AB\u00B2\u00F3\u0084nd\u008B\u001E\u00AF"
173: + "\u0019\u00BD\u00F0\u00CA\u00A0#i\u00B9eZ\u00BBP@hZ2<*\u00B4\u00B31"
174: + "\u009E\u00E9\u00D5\u00C0!\u00B8\u00F7\u009BT\u000B\u0019\u0087_"
175: + "\u00A0\u0099\u0095\u00F7\u0099~b=}\u00A8\u00F87\u0088\u009A\u0097"
176: + "\u00E3-w\u0011\u00ED\u0093_\u0016h\u0012\u0081\u000E5\u0088)\u00C7"
177: + "\u00E6\u001F\u00D6\u0096\u00DE\u00DF\u00A1xX\u00BA\u0099W\u00F5"
178: + "\u0084\u00A5\u001B\"rc\u009B\u0083\u00C3\u00FF\u001A\u00C2F\u0096"
179: + "\u00CD\u00B3\n\u00EBS.0T\u008F\u00D9H\u00E4m\u00BC1(X\u00EB\u00F2"
180: + "\u00EF4\u00C6\u00FF\u00EA\u00FE(\u00EDa\u00EE|<s]J\u0014\u00D9\u00E8"
181: + "d\u00B7\u00E3B\u0010]\u0014 >\u0013\u00E0E\u00EE\u00E2\u00B6\u00A3"
182: + "\u00AA\u00AB\u00EA\u00DBlO\u0015\u00FA\u00CBO\u00D0\u00C7B\u00F4B"
183: + "\u00EFj\u00BB\u00B5eO;\u001DA\u00CD!\u0005\u00D8\u001Ey\u009E\u0086"
184: + "\u0085M\u00C7\u00E4KGj=\u0081bP\u00CFb\u00A1\u00F2[\u008D&F\u00FC"
185: + "\u0088\u0083\u00A0\u00C1\u00C7\u00B6\u00A3\u007F\u0015$\u00C3i\u00CB"
186: + "t\u0092G\u0084\u008A\u000BV\u0092\u00B2\u0085\t[\u00BF\u0000\u00AD"
187: + "\u0019H\u009D\u0014b\u00B1t#\u0082\u000E\u0000XB\u008D*\u000CU\u00F5"
188: + "\u00EA\u001D\u00AD\u00F4>#?pa3r\u00F0\u0092\u008D\u0093~A\u00D6_"
189: + "\u00EC\u00F1l\";\u00DB|\u00DE7Y\u00CB\u00EEt`@\u0085\u00F2\u00A7"
190: + "\u00CEw2n\u00A6\u0007\u0080\u0084\u0019\u00F8P\u009E\u00E8\u00EF"
191: + "\u00D8Ua\u00D9\u00975\u00A9i\u00A7\u00AA\u00C5\u000C\u0006\u00C2Z"
192: + "\u0004\u00AB\u00FC\u0080\u000B\u00CA\u00DC\u009EDz.\u00C3E4\u0084"
193: + "\u00FD\u00D5g\u0005\u000E\u001E\u009E\u00C9\u00DBs\u00DB\u00D3\u0010"
194: + "U\u0088\u00CDg_\u00DAy\u00E3gC@\u00C5\u00C44eq>8\u00D8=(\u00F8\u009E"
195: + "\u00F1m\u00FF \u0015>!\u00E7\u008F\u00B0=J\u00E6\u00E3\u009F+\u00DB"
196: + "\u0083\u00AD\u00F7\u00E9=Zh\u0094\u0081@\u00F7\u00F6L&\u001C\u0094i)"
197: + "4A\u0015 \u00F7v\u0002\u00D4\u00F7\u00BC\u00F4k.\u00D4\u00A2\u0000h"
198: + "\u00D4\u0008$q3 \u00F4jC\u00B7\u00D4\u00B7P\u0000a\u00AF\u001E9"
199: + "\u00F6.\u0097$EF\u0014!Ot\u00BF\u008B\u0088@M\u0095\u00FC\u001D"
200: + "\u0096\u00B5\u0091\u00AFp\u00F4\u00DD\u00D3f\u00A0/E\u00BF\u00BC\t"
201: + "\u00EC\u0003\u00BD\u0097\u0085\u007F\u00ACm\u00D01\u00CB\u0085\u0004"
202: + "\u0096\u00EB'\u00B3U\u00FD9A\u00DA%G\u00E6\u00AB\u00CA\n\u009A(Px%S"
203: + "\u0004)\u00F4\n,\u0086\u00DA\u00E9\u00B6m\u00FBh\u00DC\u0014b\u00D7H"
204: + "i\u0000h\u000E\u00C0\u00A4'\u00A1\u008D\u00EEO?\u00FE\u00A2\u00E8"
205: + "\u0087\u00AD\u008C\u00B5\u008C\u00E0\u0006z\u00F4\u00D6\u00B6\u00AA"
206: + "\u00CE\u001E|\u00D37_\u00EC\u00CEx\u00A3\u0099@k*B \u00FE\u009E5"
207: + "\u00D9\u00F3\u0085\u00B9\u00EE9\u00D7\u00AB;\u0012N\u008B\u001D"
208: + "\u00C9\u00FA\u00F7Km\u0018V&\u00A3f1\u00EA\u00E3\u0097\u00B2:n\u00FA"
209: + "t\u00DD[C2hA\u00E7\u00F7\u00CAx \u00FB\u00FB\n\u00F5N\u00D8\u00FE"
210: + "\u00B3\u0097E@V\u00AC\u00BAH\u0095'US:: \u0083\u008D\u0087\u00FEk"
211: + "\u00A9\u00B7\u00D0\u0096\u0095KU\u00A8g\u00BC\u00A1\u0015\u009AX"
212: + "\u00CC\u00A9)c\u0099\u00E1\u00DB3\u00A6*JV?1%\u00F9^\u00F4~\u001C"
213: + "\u0090)1|\u00FD\u00F8\u00E8\u0002\u0004'/p\u0080\u00BB\u0015\\\u0005"
214: + "(,\u00E3\u0095\u00C1\u0015H\u00E4\u00C6m\"H\u00C1\u0013?\u00C7\u000F"
215: + "\u0086\u00DC\u0007\u00F9\u00C9\u00EEA\u0004\u001F\u000F@Gy\u00A4]"
216: + "\u0088n\u00172_Q\u00EB\u00D5\u009B\u00C0\u00D1\u00F2\u00BC\u00C1"
217: + "\u008FA\u00115d%{x4`*\u009C`\u00DF\u00F8\u00E8\u00A3\u001Fcl\u001B"
218: + "\u000E\u0012\u00B4\u00C2\u0002\u00E12\u009E\u00AFfO\u00D1\u00CA"
219: + "\u00D1\u0081\u0015k#\u0095\u00E03>\u0092\u00E1;$\u000Bb\u00EE\u00BE"
220: + "\u00B9\"\u0085\u00B2\u00A2\u000E\u00E6\u00BA\r\u0099\u00DEr\u000C"
221: + "\u008C-\u00A2\u00F7(\u00D0\u0012xE\u0095\u00B7\u0094\u00FDd}\u0008b"
222: + "\u00E7\u00CC\u00F5\u00F0TI\u00A3o\u0087}H\u00FA\u00C3\u009D\u00FD'"
223: + "\u00F3>\u008D\u001E\nGcA\u0099.\u00FFt:on\u00AB\u00F4\u00F8\u00FD7"
224: + "\u00A8\u0012\u00DC`\u00A1\u00EB\u00DD\u00F8\u0099\u001B\u00E1L\u00DB"
225: + "nk\r\u00C6{U\u0010mg,7'e\u00D4;\u00DC\u00D0\u00E8\u0004\u00F1)\r"
226: + "\u00C7\u00CC\u0000\u00FF\u00A3\u00B59\u000F\u0092i\u000F\u00ED\u000B"
227: + "f{\u009F\u00FB\u00CE\u00DB}\u009C\u00A0\u0091\u00CF\u000B\u00D9"
228: + "\u0015^\u00A3\u00BB\u0013/\u0088Q[\u00AD${\u0094y\u00BFv;\u00D6"
229: + "\u00EB79.\u00B3\u00CC\u0011Yy\u0080&\u00E2\u0097\u00F4.1-hB\u00AD"
230: + "\u00A7\u00C6j+;\u0012uL\u00CCx.\u00F1\u001Cj\u0012B7\u00B7\u0092Q"
231: + "\u00E7\u0006\u00A1\u00BB\u00E6K\u00FBcP\u001Ak\u0010\u0018\u0011"
232: + "\u00CA\u00ED\u00FA=%\u00BD\u00D8\u00E2\u00E1\u00C3\u00C9DB\u0016Y\n"
233: + "\u0012\u0013\u0086\u00D9\u000C\u00ECn\u00D5\u00AB\u00EA*d\u00AFgN"
234: + "\u00DA\u0086\u00A8_\u00BE\u00BF\u00E9\u0088d\u00E4\u00C3\u00FE\u009D"
235: + "\u00BC\u0080W\u00F0\u00F7\u00C0\u0086`x{\u00F8`\u0003`M\u00D1\u00FD"
236: + "\u0083F\u00F68\u001F\u00B0wE\u00AE\u0004\u00D76\u00FC\u00CC\u0083Bk3"
237: + "\u00F0\u001E\u00ABq\u00B0\u0080A\u0087<\u0000^_w\u00A0W\u00BE\u00BD"
238: + "\u00E8\u00AE$UFB\u0099\u00BFX.aNX\u00F4\u008F\u00F2\u00DD\u00FD"
239: + "\u00A2\u00F4t\u00EF8\u0087\u0089\u00BD\u00C2Sf\u00F9\u00C3\u00C8"
240: + "\u00B3\u008Et\u00B4u\u00F2UF\u00FC\u00D9\u00B9z\u00EB&a\u008B\u001D"
241: + "\u00DF\u0084\u0084j\u000Ey\u0091_\u0095\u00E2FnY\u008E \u00B4Wp"
242: + "\u008C\u00D5U\u0091\u00C9\u0002\u00DEL\u00B9\u000B\u00AC\u00E1\u00BB"
243: + "\u0082\u0005\u00D0\u0011\u00A8bHut\u00A9\u009E\u00B7\u007F\u0019"
244: + "\u00B6\u00E0\u00A9\u00DC\tf-\t\u00A1\u00C42F3\u00E8Z\u001F\u0002\t"
245: + "\u00F0\u00BE\u008CJ\u0099\u00A0%\u001Dn\u00FE\u0010\u001A\u00B9="
246: + "\u001D\u000B\u00A5\u00A4\u00DF\u00A1\u0086\u00F2\u000F(h\u00F1i"
247: + "\u00DC\u00B7\u00DA\u0083W9\u0006\u00FE\u00A1\u00E2\u00CE\u009BO"
248: + "\u00CD\u007FRP\u0011^\u0001\u00A7\u0006\u0083\u00FA\u00A0\u0002"
249: + "\u00B5\u00C4\r\u00E6\u00D0'\u009A\u00F8\u008C'w?\u0086A\u00C3`L"
250: + "\u0006a\u00A8\u0006\u00B5\u00F0\u0017z(\u00C0\u00F5\u0086\u00E0"
251: + "\u0000`X\u00AA0\u00DC}b\u0011\u00E6\u009E\u00D7#8\u00EAcS\u00C2"
252: + "\u00DD\u0094\u00C2\u00C2\u00164\u00BB\u00CB\u00EEV\u0090\u00BC\u00B6"
253: + "\u00DE\u00EB\u00FC}\u00A1\u00CEY\u001Dvo\u0005\u00E4\tK|\u0001\u0088"
254: + "9r\n=|\u0092|$\u0086\u00E3r_rM\u009D\u00B9\u001A\u00C1[\u00B4\u00D3"
255: + "\u009E\u00B8\u00FC\u00EDTUx\u0008\u00FC\u00A5\u00B5\u00D8=|\u00D3M"
256: + "\u00AD\u000F\u00C4\u001EP\u00EF^\u00B1a\u00E6\u00F8\u00A2\u0085"
257: + "\u0014\u00D9lQ\u0013<o\u00D5\u00C7\u00E7V\u00E1N\u00C46*\u00BF\u00CE"
258: + "\u00DD\u00C6\u00C87\u00D7\u009A24\u0092c\u0082\u0012g\u000E\u00FA"
259: + "\u008E@`\u0000\u00E0:9\u00CE7\u00D3\u00FA\u00F5\u00CF\u00AB\u00C2w7Z"
260: + "\u00C5-\u001B\\\u00B0g\u009EO\u00A37B\u00D3\u0082'@\u0099\u00BC"
261: + "\u009B\u00BE\u00D5\u0011\u008E\u009D\u00BF\u000Fs\u0015\u00D6-\u001C"
262: + "~\u00C7\u0000\u00C4{\u00B7\u008C\u001Bk!\u00A1\u0090E\u00B2n\u00B1"
263: + "\u00BEj6n\u00B4WH\u00AB/\u00BC\u0094ny\u00C6\u00A3v\u00D2eI\u00C2"
264: + "\u00C8S\u000F\u00F8\u00EEF\u008D\u00DE}\u00D5s\n\u001DL\u00D0M\u00C6"
265: + ")9\u00BB\u00DB\u00A9\u00BAFP\u00AC\u0095&\u00E8\u00BE^\u00E3\u0004"
266: + "\u00A1\u00FA\u00D5\u00F0j-Q\u009Ac\u00EF\u008C\u00E2\u009A\u0086"
267: + "\u00EE\"\u00C0\u0089\u00C2\u00B8C$.\u00F6\u00A5\u001E\u0003\u00AA"
268: + "\u009C\u00F2\u00D0\u00A4\u0083\u00C0a\u00BA\u009B\u00E9jM\u008F"
269: + "\u00E5\u0015P\u00BAd[\u00D6(&\u00A2\u00F9\u00A7::\u00E1K\u00A9\u0095"
270: + "\u0086\u00EFUb\u00E9\u00C7/\u00EF\u00D3\u00F7R\u00F7\u00DA?\u0004oiw"
271: + "\u00FA\nY\u0080\u00E4\u00A9\u0015\u0087\u00B0\u0086\u0001\u009B\t"
272: + "\u00E6\u00AD;>\u00E5\u0093\u00E9\u0090\u00FDZ\u009E4\u00D7\u0097,"
273: + "\u00F0\u00B7\u00D9\u0002+\u008BQ\u0096\u00D5\u00AC:\u0001}\u00A6}"
274: + "\u00D1\u00CF>\u00D6|}-(\u001F\u009F%\u00CF\u00AD\u00F2\u00B8\u009BZ"
275: + "\u00D6\u00B4rZ\u0088\u00F5L\u00E0)\u00ACq\u00E0\u0019\u00A5\u00E6G"
276: + "\u00B0\u00AC\u00FD\u00ED\u0093\u00FA\u009B\u00E8\u00D3\u00C4\u008D(;"
277: + "W\u00CC\u00F8\u00D5f)y\u0013.(x_\u0001\u0091\u00EDu`U\u00F7\u0096"
278: + "\u000ED\u00E3\u00D3^\u008C\u0015\u0005m\u00D4\u0088\u00F4m\u00BA"
279: + "\u0003\u00A1a%\u0005d\u00F0\u00BD\u00C3\u00EB\u009E\u0015<\u0090W"
280: + "\u00A2\u0097'\u001A\u00EC\u00A9:\u0007*\u001B?m\u009B\u001Ec!\u00F5"
281: + "\u00F5\u009Cf\u00FB&\u00DC\u00F3\u0019u3\u00D9(\u00B1U\u00FD\u00F5"
282: + "\u0003V4\u0082\u008A\u00BA<\u00BB(Qw\u0011\u00C2\n\u00D9\u00F8\u00AB"
283: + "\u00CCQg\u00CC\u00AD\u0092_M\u00E8\u0017Q80\u00DC\u008E7\u009DXb"
284: + "\u0093 \u00F9\u0091\u00EAz\u0090\u00C2\u00FB>{\u00CEQ!\u00CEdwO"
285: + "\u00BE2\u00A8\u00B6\u00E3~\u00C3)=FH\u00DESid\u0013\u00E6\u0080"
286: + "\u00A2\u00AE\u0008\u0010\u00DDm\u00B2$i\u0085-\u00FD\t\u0007!f\u00B3"
287: + "\u009AF\ndE\u00C0\u00DDXl\u00DE\u00CF\u001C \u00C8\u00AE[\u00BE"
288: + "\u00F7\u00DD\u001BX\u008D@\u00CC\u00D2\u0001\u007Fk\u00B4\u00E3"
289: + "\u00BB\u00DD\u00A2j~:Y\u00FFE>5\nD\u00BC\u00B4\u00CD\u00D5r\u00EA"
290: + "\u00CE\u00A8\u00FAd\u0084\u00BB\u008Df\u0012\u00AE\u00BF<oG\u00D2"
291: + "\u009B\u00E4cT/]\u009E\u00AE\u00C2w\u001B\u00F6Ncpt\u000E\r\u008D"
292: + "\u00E7[\u0013W\u00F8r\u0016q\u00AFS}]@@\u00CB\u0008N\u00B4\u00E2"
293: + "\u00CC4\u00D2Fj\u0001\u0015\u00AF\u0084\u00E1\u00B0\u0004(\u0095"
294: + "\u0098:\u001D\u0006\u00B8\u009F\u00B4\u00CEn\u00A0Ho?;\u00825 \u00AB"
295: + "\u0082\u0001\u001A\u001DK'r'\u00F8a\u0015`\u00B1\u00E7\u0093?\u00DC"
296: + "\u00BB:y+4E%\u00BD\u00A0\u00889\u00E1Q\u00CEyK/2\u00C9\u00B7\u00A0"
297: + "\u001F\u00BA\u00C9\u00E0\u001C\u00C8~\u00BC\u00C7\u00D1\u00F6\u00CF"
298: + "\u0001\u0011\u00C3\u00A1\u00E8\u00AA\u00C7\u001A\u0090\u0087I\u00D4O"
299: + "\u00BD\u009A\u00D0\u00DA\u00DE\u00CB\u00D5\n\u00DA8\u00039\u00C3*"
300: + "\u00C6\u00916g\u008D\u00F91|\u00E0\u00B1+O\u00F7\u009EY\u00B7C\u00F5"
301: + "\u00BB:\u00F2\u00D5\u0019\u00FF'\u00D9E\u009C\u00BF\u0097\",\u0015"
302: + "\u00E6\u00FC*\u000F\u0091\u00FCq\u009B\u0094\u0015%\u00FA\u00E5"
303: + "\u0093a\u00CE\u00B6\u009C\u00EB\u00C2\u00A8dY\u0012\u00BA\u00A8"
304: + "\u00D1\u00B6\u00C1\u0007^\u00E3\u0005j\u000C\u0010\u00D2Pe\u00CB"
305: + "\u0003\u00A4B\u00E0\u00ECn\u000E\u0016\u0098\u00DB;L\u0098\u00A0"
306: + "\u00BE2x\u00E9d\u009F\u001F\u00952\u00E0\u00D3\u0092\u00DF\u00D3"
307: + "\u00A04+\u0089q\u00F2\u001E\u001B\ntAK\u00A34\u008C\u00C5\u00BEq "
308: + "\u00C3v2\u00D8\u00DF5\u009F\u008D\u009B\u0099/.\u00E6\u000BoG\u000F"
309: + "\u00E3\u00F1\u001D\u00E5L\u00DAT\u001E\u00DA\u00D8\u0091\u00CEby"
310: + "\u00CF\u00CD>~o\u0016\u0018\u00B1f\u00FD,\u001D\u0005\u0084\u008F"
311: + "\u00D2\u00C5\u00F6\u00FB\"\u0099\u00F5#\u00F3W\u00A62v#\u0093\u00A8"
312: + "51V\u00CC\u00CD\u0002\u00AC\u00F0\u0081bZu\u00EB\u00B5n\u00166\u0097"
313: + "\u0088\u00D2s\u00CC\u00DE\u0096b\u0092\u0081\u00B9I\u00D0LP\u0090"
314: + "\u001Bq\u00C6V\u0014\u00E6\u00C6\u00C7\u00BD2z\u0014\nE\u00E1\u00D0"
315: + "\u0006\u00C3\u00F2{\u009A\u00C9\u00AAS\u00FDb\u00A8\u000F\u0000"
316: + "\u00BB%\u00BF\u00E25\u00BD\u00D2\u00F6q\u0012i\u0005\u00B2\u0004"
317: + "\u0002\"\u00B6\u00CB\u00CF|\u00CDv\u009C+S\u0011>\u00C0\u0016@\u00E3"
318: + "\u00D38\u00AB\u00BD`%G\u00AD\u00F0\u00BA8 \u009C\u00F7F\u00CEvw"
319: + "\u00AF\u00A1\u00C5 u``\u0085\u00CB\u00FEN\u008A\u00E8\u008D\u00D8z"
320: + "\u00AA\u00F9\u00B0L\u00F9\u00AA~\u0019H\u00C2\\\u0002\u00FB\u008A"
321: + "\u008C\u0001\u00C3j\u00E4\u00D6\u00EB\u00E1\u00F9\u0090\u00D4\u00F8i"
322: + "\u00A6\\\u00DE\u00A0?\t%-\u00C2\u0008\u00E6\u009F\u00B7Na2\u00CEw"
323: + "\u00E2[W\u008F\u00DF\u00E3:\u00C3r\u00E6";
324:
325: /** Self eplanatory constants */
326: private static final int ROUNDS = 16, BLOCK_SIZE = 8,
327: MIN_USER_KEY_LENGTH = 40 / 8, // given in bytes from a value in bits
328: MAX_USER_KEY_LENGTH = 448 / 8; // given in bytes from a value in bits
329:
330: /** P-box and S-boxes */
331: private static final int[] sP = new int[ROUNDS + 2],
332: sS = new int[1024];
333:
334: /**
335: * Expand the compressed (see above) data into the P-box and S-boxes.
336: *
337: * We use the lower 8 bits of every character. Every four characters
338: * make up one 32-bit integer.
339: *
340: * FIXME: Encoding this in 7-bits per byte would be better because of Sun's
341: * internal .class file's UTF8 format. This requires a special decoder...
342: * Still this is better than Cryptix IJCE 3.0.3 for which the .class
343: * file was 61KB (this one yields 11KB). --gelderen
344: */
345: static {
346: for (int i = 0, j = 0; i < sP.length; i++)
347: sP[i] = (cP.charAt(j++) << 24) | (cP.charAt(j++) << 16)
348: | (cP.charAt(j++) << 8) | (cP.charAt(j++));
349:
350: for (int i = 0, j = 0; i < sS.length; i++)
351: sS[i] = (cS.charAt(j++) << 24) | (cS.charAt(j++) << 16)
352: | (cS.charAt(j++) << 8) | (cS.charAt(j++));
353: }
354:
355: // Instance variables
356: // ...................................................................
357:
358: /** P-box, used during key-setup */
359: private final int[] P = new int[ROUNDS + 2];
360:
361: /**
362: * Individual ints representing the session key taken from int[] P.
363: * We use these as a speedup instead of the P-array itself.
364: */
365: private int K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K10,
366: K11, K12, K13, K14, K15, K16, K17;
367:
368: /** 4 S-boxes */
369: private final int[] S0 = new int[256], S1 = new int[256],
370: S2 = new int[256], S3 = new int[256];
371:
372: // Constructor
373: // ...................................................................
374:
375: public Blowfish() {
376: super (BLOCK_SIZE);
377: }
378:
379: // BPI Methods
380: // ...................................................................
381:
382: /**
383: * Initialize the object for encryption or decryption, given a Key.
384: * <p>
385: * This method expects a key with algorithm 'Blowfish' and
386: * format 'RAW'. Both are case insensitive.
387: * <p>
388: * FIXME: checks need overhaul (or moved out to superclass).
389: *
390: * @param key key
391: * @param decrypt true for decrypt mode, false for encrypt mode
392: *
393: * @throws InvalidKeyException when key==null or getAlgorithm()!=Blowfish
394: * or getFormat()!=RAW or getEncoded()==null or size<40 or
395: * size>448
396: */
397: protected void coreInit(Key key, boolean decrypt)
398: throws InvalidKeyException {
399: if (key == null)
400: throw new InvalidKeyException("Key missing");
401:
402: if (!key.getAlgorithm().equalsIgnoreCase("Blowfish"))
403: throw new InvalidKeyException(
404: "Wrong algorithm: Blowfish required");
405:
406: if (!key.getFormat().equalsIgnoreCase("RAW"))
407: throw new InvalidKeyException(
408: "Wrong format: RAW bytes needed");
409:
410: byte[] userkey = key.getEncoded();
411: if (userkey == null)
412: throw new InvalidKeyException("RAW bytes missing");
413:
414: int len = userkey.length;
415: if (len < MIN_USER_KEY_LENGTH || len > MAX_USER_KEY_LENGTH)
416: throw new InvalidKeyException("Invalid user key length");
417:
418: // Initialize ourselves (S0, S1, S2, S3) from the huge static S-box
419: System.arraycopy(sS, 0, S0, 0, 256);
420: System.arraycopy(sS, 256, S1, 0, 256);
421: System.arraycopy(sS, 512, S2, 0, 256);
422: System.arraycopy(sS, 768, S3, 0, 256);
423:
424: // Initialize our P-box from the static copy
425: System.arraycopy(sP, 0, P, 0, ROUNDS + 2);
426:
427: // Merge key into P-box.
428: // Depends on correct key-size !!
429: int ri;
430: for (int i = 0, j = 0; i < ROUNDS + 2; i++) {
431: ri = 0;
432: for (int k = 0; k < 4; k++) {
433: ri = (ri << 8) | (userkey[j++] & 0xFF);
434: j %= len;
435: }
436: P[i] ^= ri;
437: }
438:
439: // Generate the P-array & S-boxes
440: keyEncrypt(0, 0, P, 0);
441: for (int i = 2; i < ROUNDS + 2; i += 2)
442: keyEncrypt(P[i - 2], P[i - 1], P, i);
443:
444: keyEncrypt(P[ROUNDS], P[ROUNDS + 1], S0, 0);
445: for (int i = 2; i < 256; i += 2)
446: keyEncrypt(S0[i - 2], S0[i - 1], S0, i);
447:
448: keyEncrypt(S0[254], S0[255], S1, 0);
449: for (int i = 2; i < 256; i += 2)
450: keyEncrypt(S1[i - 2], S1[i - 1], S1, i);
451:
452: keyEncrypt(S1[254], S1[255], S2, 0);
453: for (int i = 2; i < 256; i += 2)
454: keyEncrypt(S2[i - 2], S2[i - 1], S2, i);
455:
456: keyEncrypt(S2[254], S2[255], S3, 0);
457: for (int i = 2; i < 256; i += 2)
458: keyEncrypt(S3[i - 2], S3[i - 1], S3, i);
459:
460: // Store subkeys in individual instance variables for speedup
461: if (decrypt) {
462: K00 = P[17];
463: K01 = P[16];
464: K02 = P[15];
465: K03 = P[14];
466: K04 = P[13];
467: K05 = P[12];
468: K06 = P[11];
469: K07 = P[10];
470: K08 = P[9];
471: K09 = P[8];
472: K10 = P[7];
473: K11 = P[6];
474: K12 = P[5];
475: K13 = P[4];
476: K14 = P[3];
477: K15 = P[2];
478: K16 = P[1];
479: K17 = P[0];
480: } else {
481: K00 = P[0];
482: K01 = P[1];
483: K02 = P[2];
484: K03 = P[3];
485: K04 = P[4];
486: K05 = P[5];
487: K06 = P[6];
488: K07 = P[7];
489: K08 = P[8];
490: K09 = P[9];
491: K10 = P[10];
492: K11 = P[11];
493: K12 = P[12];
494: K13 = P[13];
495: K14 = P[14];
496: K15 = P[15];
497: K16 = P[16];
498: K17 = P[17];
499:
500: }
501: }
502:
503: /**
504: * Encrypt or decrypt a single block of data.
505: *
506: * @param in array containing datablock to be encrypted
507: * @param inOffset where the datablock starts
508: * @param out array where the output is to be stored
509: * @param outOffset where the output should start
510: */
511: protected void coreCrypt(byte[] in, int inOffset, byte[] out,
512: int outOffset) {
513:
514: int L = (in[inOffset++]) << 24 | (in[inOffset++] & 0xFF) << 16
515: | (in[inOffset++] & 0xFF) << 8
516: | (in[inOffset++] & 0xFF);
517: int R = (in[inOffset++]) << 24 | (in[inOffset++] & 0xFF) << 16
518: | (in[inOffset++] & 0xFF) << 8 | (in[inOffset] & 0xFF);
519:
520: L ^= K00;
521: R ^= (((S0[L >>> 24] + S1[(L >>> 16) & 0xFF]) ^ S2[(L >>> 8) & 0xFF]) + S3[L & 0xFF])
522: ^ K01;
523: L ^= (((S0[R >>> 24] + S1[(R >>> 16) & 0xFF]) ^ S2[(R >>> 8) & 0xFF]) + S3[R & 0xFF])
524: ^ K02;
525: R ^= (((S0[L >>> 24] + S1[(L >>> 16) & 0xFF]) ^ S2[(L >>> 8) & 0xFF]) + S3[L & 0xFF])
526: ^ K03;
527: L ^= (((S0[R >>> 24] + S1[(R >>> 16) & 0xFF]) ^ S2[(R >>> 8) & 0xFF]) + S3[R & 0xFF])
528: ^ K04;
529: R ^= (((S0[L >>> 24] + S1[(L >>> 16) & 0xFF]) ^ S2[(L >>> 8) & 0xFF]) + S3[L & 0xFF])
530: ^ K05;
531: L ^= (((S0[R >>> 24] + S1[(R >>> 16) & 0xFF]) ^ S2[(R >>> 8) & 0xFF]) + S3[R & 0xFF])
532: ^ K06;
533: R ^= (((S0[L >>> 24] + S1[(L >>> 16) & 0xFF]) ^ S2[(L >>> 8) & 0xFF]) + S3[L & 0xFF])
534: ^ K07;
535: L ^= (((S0[R >>> 24] + S1[(R >>> 16) & 0xFF]) ^ S2[(R >>> 8) & 0xFF]) + S3[R & 0xFF])
536: ^ K08;
537: R ^= (((S0[L >>> 24] + S1[(L >>> 16) & 0xFF]) ^ S2[(L >>> 8) & 0xFF]) + S3[L & 0xFF])
538: ^ K09;
539: L ^= (((S0[R >>> 24] + S1[(R >>> 16) & 0xFF]) ^ S2[(R >>> 8) & 0xFF]) + S3[R & 0xFF])
540: ^ K10;
541: R ^= (((S0[L >>> 24] + S1[(L >>> 16) & 0xFF]) ^ S2[(L >>> 8) & 0xFF]) + S3[L & 0xFF])
542: ^ K11;
543: L ^= (((S0[R >>> 24] + S1[(R >>> 16) & 0xFF]) ^ S2[(R >>> 8) & 0xFF]) + S3[R & 0xFF])
544: ^ K12;
545: R ^= (((S0[L >>> 24] + S1[(L >>> 16) & 0xFF]) ^ S2[(L >>> 8) & 0xFF]) + S3[L & 0xFF])
546: ^ K13;
547: L ^= (((S0[R >>> 24] + S1[(R >>> 16) & 0xFF]) ^ S2[(R >>> 8) & 0xFF]) + S3[R & 0xFF])
548: ^ K14;
549: R ^= (((S0[L >>> 24] + S1[(L >>> 16) & 0xFF]) ^ S2[(L >>> 8) & 0xFF]) + S3[L & 0xFF])
550: ^ K15;
551: L ^= (((S0[R >>> 24] + S1[(R >>> 16) & 0xFF]) ^ S2[(R >>> 8) & 0xFF]) + S3[R & 0xFF])
552: ^ K16;
553: R ^= K17;
554:
555: out[outOffset++] = (byte) (R >>> 24);
556: out[outOffset++] = (byte) (R >>> 16);
557: out[outOffset++] = (byte) (R >>> 8);
558: out[outOffset++] = (byte) (R);
559: out[outOffset++] = (byte) (L >>> 24);
560: out[outOffset++] = (byte) (L >>> 16);
561: out[outOffset++] = (byte) (L >>> 8);
562: out[outOffset] = (byte) (L);
563: }
564:
565: // Internals
566: // ...................................................................
567:
568: /**
569: * Perform a Blowfish encryption.
570: *
571: * This method is only called by the <code>makeKey</code> method to
572: * generate the key schedule from user data. It outputs the result to an
573: * int array.
574: *
575: * @param L left half (32-bit) of the plain text block.
576: * @param R right half (32-bit) of the plain text block.
577: * @param out the int array where the result will be saved.
578: * @param outOff where the data starts in the byte array.
579: */
580: private void keyEncrypt(int L, int R, int[] out, int outOff) {
581: L ^= P[0];
582: for (int i = 0; i < ROUNDS;) {
583: R ^= (((S0[L >>> 24] + S1[(L >>> 16) & 0xFF]) ^ S2[(L >>> 8) & 0xFF]) + S3[L & 0xFF])
584: ^ P[++i];
585: L ^= (((S0[R >>> 24] + S1[(R >>> 16) & 0xFF]) ^ S2[(R >>> 8) & 0xFF]) + S3[R & 0xFF])
586: ^ P[++i];
587: }
588: out[outOff++] = R ^ P[ROUNDS + 1];
589: out[outOff] = L;
590: }
591: }
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