001: package org.bouncycastle.crypto.engines;
002:
003: import org.bouncycastle.crypto.BlockCipher;
004: import org.bouncycastle.crypto.CipherParameters;
005: import org.bouncycastle.crypto.DataLengthException;
006: import org.bouncycastle.crypto.params.KeyParameter;
007:
008: /**
009: * A class that provides Blowfish key encryption operations,
010: * such as encoding data and generating keys.
011: * All the algorithms herein are from Applied Cryptography
012: * and implement a simplified cryptography interface.
013: */
014: public final class BlowfishEngine implements BlockCipher {
015: private final static int[] KP = { 0x243F6A88, 0x85A308D3,
016: 0x13198A2E, 0x03707344, 0xA4093822, 0x299F31D0, 0x082EFA98,
017: 0xEC4E6C89, 0x452821E6, 0x38D01377, 0xBE5466CF, 0x34E90C6C,
018: 0xC0AC29B7, 0xC97C50DD, 0x3F84D5B5, 0xB5470917, 0x9216D5D9,
019: 0x8979FB1B },
020:
021: KS0 = { 0xD1310BA6, 0x98DFB5AC, 0x2FFD72DB, 0xD01ADFB7, 0xB8E1AFED,
022: 0x6A267E96, 0xBA7C9045, 0xF12C7F99, 0x24A19947, 0xB3916CF7,
023: 0x0801F2E2, 0x858EFC16, 0x636920D8, 0x71574E69, 0xA458FEA3,
024: 0xF4933D7E, 0x0D95748F, 0x728EB658, 0x718BCD58, 0x82154AEE,
025: 0x7B54A41D, 0xC25A59B5, 0x9C30D539, 0x2AF26013, 0xC5D1B023,
026: 0x286085F0, 0xCA417918, 0xB8DB38EF, 0x8E79DCB0, 0x603A180E,
027: 0x6C9E0E8B, 0xB01E8A3E, 0xD71577C1, 0xBD314B27, 0x78AF2FDA,
028: 0x55605C60, 0xE65525F3, 0xAA55AB94, 0x57489862, 0x63E81440,
029: 0x55CA396A, 0x2AAB10B6, 0xB4CC5C34, 0x1141E8CE, 0xA15486AF,
030: 0x7C72E993, 0xB3EE1411, 0x636FBC2A, 0x2BA9C55D, 0x741831F6,
031: 0xCE5C3E16, 0x9B87931E, 0xAFD6BA33, 0x6C24CF5C, 0x7A325381,
032: 0x28958677, 0x3B8F4898, 0x6B4BB9AF, 0xC4BFE81B, 0x66282193,
033: 0x61D809CC, 0xFB21A991, 0x487CAC60, 0x5DEC8032, 0xEF845D5D,
034: 0xE98575B1, 0xDC262302, 0xEB651B88, 0x23893E81, 0xD396ACC5,
035: 0x0F6D6FF3, 0x83F44239, 0x2E0B4482, 0xA4842004, 0x69C8F04A,
036: 0x9E1F9B5E, 0x21C66842, 0xF6E96C9A, 0x670C9C61, 0xABD388F0,
037: 0x6A51A0D2, 0xD8542F68, 0x960FA728, 0xAB5133A3, 0x6EEF0B6C,
038: 0x137A3BE4, 0xBA3BF050, 0x7EFB2A98, 0xA1F1651D, 0x39AF0176,
039: 0x66CA593E, 0x82430E88, 0x8CEE8619, 0x456F9FB4, 0x7D84A5C3,
040: 0x3B8B5EBE, 0xE06F75D8, 0x85C12073, 0x401A449F, 0x56C16AA6,
041: 0x4ED3AA62, 0x363F7706, 0x1BFEDF72, 0x429B023D, 0x37D0D724,
042: 0xD00A1248, 0xDB0FEAD3, 0x49F1C09B, 0x075372C9, 0x80991B7B,
043: 0x25D479D8, 0xF6E8DEF7, 0xE3FE501A, 0xB6794C3B, 0x976CE0BD,
044: 0x04C006BA, 0xC1A94FB6, 0x409F60C4, 0x5E5C9EC2, 0x196A2463,
045: 0x68FB6FAF, 0x3E6C53B5, 0x1339B2EB, 0x3B52EC6F, 0x6DFC511F,
046: 0x9B30952C, 0xCC814544, 0xAF5EBD09, 0xBEE3D004, 0xDE334AFD,
047: 0x660F2807, 0x192E4BB3, 0xC0CBA857, 0x45C8740F, 0xD20B5F39,
048: 0xB9D3FBDB, 0x5579C0BD, 0x1A60320A, 0xD6A100C6, 0x402C7279,
049: 0x679F25FE, 0xFB1FA3CC, 0x8EA5E9F8, 0xDB3222F8, 0x3C7516DF,
050: 0xFD616B15, 0x2F501EC8, 0xAD0552AB, 0x323DB5FA, 0xFD238760,
051: 0x53317B48, 0x3E00DF82, 0x9E5C57BB, 0xCA6F8CA0, 0x1A87562E,
052: 0xDF1769DB, 0xD542A8F6, 0x287EFFC3, 0xAC6732C6, 0x8C4F5573,
053: 0x695B27B0, 0xBBCA58C8, 0xE1FFA35D, 0xB8F011A0, 0x10FA3D98,
054: 0xFD2183B8, 0x4AFCB56C, 0x2DD1D35B, 0x9A53E479, 0xB6F84565,
055: 0xD28E49BC, 0x4BFB9790, 0xE1DDF2DA, 0xA4CB7E33, 0x62FB1341,
056: 0xCEE4C6E8, 0xEF20CADA, 0x36774C01, 0xD07E9EFE, 0x2BF11FB4,
057: 0x95DBDA4D, 0xAE909198, 0xEAAD8E71, 0x6B93D5A0, 0xD08ED1D0,
058: 0xAFC725E0, 0x8E3C5B2F, 0x8E7594B7, 0x8FF6E2FB, 0xF2122B64,
059: 0x8888B812, 0x900DF01C, 0x4FAD5EA0, 0x688FC31C, 0xD1CFF191,
060: 0xB3A8C1AD, 0x2F2F2218, 0xBE0E1777, 0xEA752DFE, 0x8B021FA1,
061: 0xE5A0CC0F, 0xB56F74E8, 0x18ACF3D6, 0xCE89E299, 0xB4A84FE0,
062: 0xFD13E0B7, 0x7CC43B81, 0xD2ADA8D9, 0x165FA266, 0x80957705,
063: 0x93CC7314, 0x211A1477, 0xE6AD2065, 0x77B5FA86, 0xC75442F5,
064: 0xFB9D35CF, 0xEBCDAF0C, 0x7B3E89A0, 0xD6411BD3, 0xAE1E7E49,
065: 0x00250E2D, 0x2071B35E, 0x226800BB, 0x57B8E0AF, 0x2464369B,
066: 0xF009B91E, 0x5563911D, 0x59DFA6AA, 0x78C14389, 0xD95A537F,
067: 0x207D5BA2, 0x02E5B9C5, 0x83260376, 0x6295CFA9, 0x11C81968,
068: 0x4E734A41, 0xB3472DCA, 0x7B14A94A, 0x1B510052, 0x9A532915,
069: 0xD60F573F, 0xBC9BC6E4, 0x2B60A476, 0x81E67400, 0x08BA6FB5,
070: 0x571BE91F, 0xF296EC6B, 0x2A0DD915, 0xB6636521, 0xE7B9F9B6,
071: 0xFF34052E, 0xC5855664, 0x53B02D5D, 0xA99F8FA1, 0x08BA4799,
072: 0x6E85076A },
073:
074: KS1 = { 0x4B7A70E9, 0xB5B32944, 0xDB75092E, 0xC4192623, 0xAD6EA6B0,
075: 0x49A7DF7D, 0x9CEE60B8, 0x8FEDB266, 0xECAA8C71, 0x699A17FF,
076: 0x5664526C, 0xC2B19EE1, 0x193602A5, 0x75094C29, 0xA0591340,
077: 0xE4183A3E, 0x3F54989A, 0x5B429D65, 0x6B8FE4D6, 0x99F73FD6,
078: 0xA1D29C07, 0xEFE830F5, 0x4D2D38E6, 0xF0255DC1, 0x4CDD2086,
079: 0x8470EB26, 0x6382E9C6, 0x021ECC5E, 0x09686B3F, 0x3EBAEFC9,
080: 0x3C971814, 0x6B6A70A1, 0x687F3584, 0x52A0E286, 0xB79C5305,
081: 0xAA500737, 0x3E07841C, 0x7FDEAE5C, 0x8E7D44EC, 0x5716F2B8,
082: 0xB03ADA37, 0xF0500C0D, 0xF01C1F04, 0x0200B3FF, 0xAE0CF51A,
083: 0x3CB574B2, 0x25837A58, 0xDC0921BD, 0xD19113F9, 0x7CA92FF6,
084: 0x94324773, 0x22F54701, 0x3AE5E581, 0x37C2DADC, 0xC8B57634,
085: 0x9AF3DDA7, 0xA9446146, 0x0FD0030E, 0xECC8C73E, 0xA4751E41,
086: 0xE238CD99, 0x3BEA0E2F, 0x3280BBA1, 0x183EB331, 0x4E548B38,
087: 0x4F6DB908, 0x6F420D03, 0xF60A04BF, 0x2CB81290, 0x24977C79,
088: 0x5679B072, 0xBCAF89AF, 0xDE9A771F, 0xD9930810, 0xB38BAE12,
089: 0xDCCF3F2E, 0x5512721F, 0x2E6B7124, 0x501ADDE6, 0x9F84CD87,
090: 0x7A584718, 0x7408DA17, 0xBC9F9ABC, 0xE94B7D8C, 0xEC7AEC3A,
091: 0xDB851DFA, 0x63094366, 0xC464C3D2, 0xEF1C1847, 0x3215D908,
092: 0xDD433B37, 0x24C2BA16, 0x12A14D43, 0x2A65C451, 0x50940002,
093: 0x133AE4DD, 0x71DFF89E, 0x10314E55, 0x81AC77D6, 0x5F11199B,
094: 0x043556F1, 0xD7A3C76B, 0x3C11183B, 0x5924A509, 0xF28FE6ED,
095: 0x97F1FBFA, 0x9EBABF2C, 0x1E153C6E, 0x86E34570, 0xEAE96FB1,
096: 0x860E5E0A, 0x5A3E2AB3, 0x771FE71C, 0x4E3D06FA, 0x2965DCB9,
097: 0x99E71D0F, 0x803E89D6, 0x5266C825, 0x2E4CC978, 0x9C10B36A,
098: 0xC6150EBA, 0x94E2EA78, 0xA5FC3C53, 0x1E0A2DF4, 0xF2F74EA7,
099: 0x361D2B3D, 0x1939260F, 0x19C27960, 0x5223A708, 0xF71312B6,
100: 0xEBADFE6E, 0xEAC31F66, 0xE3BC4595, 0xA67BC883, 0xB17F37D1,
101: 0x018CFF28, 0xC332DDEF, 0xBE6C5AA5, 0x65582185, 0x68AB9802,
102: 0xEECEA50F, 0xDB2F953B, 0x2AEF7DAD, 0x5B6E2F84, 0x1521B628,
103: 0x29076170, 0xECDD4775, 0x619F1510, 0x13CCA830, 0xEB61BD96,
104: 0x0334FE1E, 0xAA0363CF, 0xB5735C90, 0x4C70A239, 0xD59E9E0B,
105: 0xCBAADE14, 0xEECC86BC, 0x60622CA7, 0x9CAB5CAB, 0xB2F3846E,
106: 0x648B1EAF, 0x19BDF0CA, 0xA02369B9, 0x655ABB50, 0x40685A32,
107: 0x3C2AB4B3, 0x319EE9D5, 0xC021B8F7, 0x9B540B19, 0x875FA099,
108: 0x95F7997E, 0x623D7DA8, 0xF837889A, 0x97E32D77, 0x11ED935F,
109: 0x16681281, 0x0E358829, 0xC7E61FD6, 0x96DEDFA1, 0x7858BA99,
110: 0x57F584A5, 0x1B227263, 0x9B83C3FF, 0x1AC24696, 0xCDB30AEB,
111: 0x532E3054, 0x8FD948E4, 0x6DBC3128, 0x58EBF2EF, 0x34C6FFEA,
112: 0xFE28ED61, 0xEE7C3C73, 0x5D4A14D9, 0xE864B7E3, 0x42105D14,
113: 0x203E13E0, 0x45EEE2B6, 0xA3AAABEA, 0xDB6C4F15, 0xFACB4FD0,
114: 0xC742F442, 0xEF6ABBB5, 0x654F3B1D, 0x41CD2105, 0xD81E799E,
115: 0x86854DC7, 0xE44B476A, 0x3D816250, 0xCF62A1F2, 0x5B8D2646,
116: 0xFC8883A0, 0xC1C7B6A3, 0x7F1524C3, 0x69CB7492, 0x47848A0B,
117: 0x5692B285, 0x095BBF00, 0xAD19489D, 0x1462B174, 0x23820E00,
118: 0x58428D2A, 0x0C55F5EA, 0x1DADF43E, 0x233F7061, 0x3372F092,
119: 0x8D937E41, 0xD65FECF1, 0x6C223BDB, 0x7CDE3759, 0xCBEE7460,
120: 0x4085F2A7, 0xCE77326E, 0xA6078084, 0x19F8509E, 0xE8EFD855,
121: 0x61D99735, 0xA969A7AA, 0xC50C06C2, 0x5A04ABFC, 0x800BCADC,
122: 0x9E447A2E, 0xC3453484, 0xFDD56705, 0x0E1E9EC9, 0xDB73DBD3,
123: 0x105588CD, 0x675FDA79, 0xE3674340, 0xC5C43465, 0x713E38D8,
124: 0x3D28F89E, 0xF16DFF20, 0x153E21E7, 0x8FB03D4A, 0xE6E39F2B,
125: 0xDB83ADF7 },
126:
127: KS2 = { 0xE93D5A68, 0x948140F7, 0xF64C261C, 0x94692934, 0x411520F7,
128: 0x7602D4F7, 0xBCF46B2E, 0xD4A20068, 0xD4082471, 0x3320F46A,
129: 0x43B7D4B7, 0x500061AF, 0x1E39F62E, 0x97244546, 0x14214F74,
130: 0xBF8B8840, 0x4D95FC1D, 0x96B591AF, 0x70F4DDD3, 0x66A02F45,
131: 0xBFBC09EC, 0x03BD9785, 0x7FAC6DD0, 0x31CB8504, 0x96EB27B3,
132: 0x55FD3941, 0xDA2547E6, 0xABCA0A9A, 0x28507825, 0x530429F4,
133: 0x0A2C86DA, 0xE9B66DFB, 0x68DC1462, 0xD7486900, 0x680EC0A4,
134: 0x27A18DEE, 0x4F3FFEA2, 0xE887AD8C, 0xB58CE006, 0x7AF4D6B6,
135: 0xAACE1E7C, 0xD3375FEC, 0xCE78A399, 0x406B2A42, 0x20FE9E35,
136: 0xD9F385B9, 0xEE39D7AB, 0x3B124E8B, 0x1DC9FAF7, 0x4B6D1856,
137: 0x26A36631, 0xEAE397B2, 0x3A6EFA74, 0xDD5B4332, 0x6841E7F7,
138: 0xCA7820FB, 0xFB0AF54E, 0xD8FEB397, 0x454056AC, 0xBA489527,
139: 0x55533A3A, 0x20838D87, 0xFE6BA9B7, 0xD096954B, 0x55A867BC,
140: 0xA1159A58, 0xCCA92963, 0x99E1DB33, 0xA62A4A56, 0x3F3125F9,
141: 0x5EF47E1C, 0x9029317C, 0xFDF8E802, 0x04272F70, 0x80BB155C,
142: 0x05282CE3, 0x95C11548, 0xE4C66D22, 0x48C1133F, 0xC70F86DC,
143: 0x07F9C9EE, 0x41041F0F, 0x404779A4, 0x5D886E17, 0x325F51EB,
144: 0xD59BC0D1, 0xF2BCC18F, 0x41113564, 0x257B7834, 0x602A9C60,
145: 0xDFF8E8A3, 0x1F636C1B, 0x0E12B4C2, 0x02E1329E, 0xAF664FD1,
146: 0xCAD18115, 0x6B2395E0, 0x333E92E1, 0x3B240B62, 0xEEBEB922,
147: 0x85B2A20E, 0xE6BA0D99, 0xDE720C8C, 0x2DA2F728, 0xD0127845,
148: 0x95B794FD, 0x647D0862, 0xE7CCF5F0, 0x5449A36F, 0x877D48FA,
149: 0xC39DFD27, 0xF33E8D1E, 0x0A476341, 0x992EFF74, 0x3A6F6EAB,
150: 0xF4F8FD37, 0xA812DC60, 0xA1EBDDF8, 0x991BE14C, 0xDB6E6B0D,
151: 0xC67B5510, 0x6D672C37, 0x2765D43B, 0xDCD0E804, 0xF1290DC7,
152: 0xCC00FFA3, 0xB5390F92, 0x690FED0B, 0x667B9FFB, 0xCEDB7D9C,
153: 0xA091CF0B, 0xD9155EA3, 0xBB132F88, 0x515BAD24, 0x7B9479BF,
154: 0x763BD6EB, 0x37392EB3, 0xCC115979, 0x8026E297, 0xF42E312D,
155: 0x6842ADA7, 0xC66A2B3B, 0x12754CCC, 0x782EF11C, 0x6A124237,
156: 0xB79251E7, 0x06A1BBE6, 0x4BFB6350, 0x1A6B1018, 0x11CAEDFA,
157: 0x3D25BDD8, 0xE2E1C3C9, 0x44421659, 0x0A121386, 0xD90CEC6E,
158: 0xD5ABEA2A, 0x64AF674E, 0xDA86A85F, 0xBEBFE988, 0x64E4C3FE,
159: 0x9DBC8057, 0xF0F7C086, 0x60787BF8, 0x6003604D, 0xD1FD8346,
160: 0xF6381FB0, 0x7745AE04, 0xD736FCCC, 0x83426B33, 0xF01EAB71,
161: 0xB0804187, 0x3C005E5F, 0x77A057BE, 0xBDE8AE24, 0x55464299,
162: 0xBF582E61, 0x4E58F48F, 0xF2DDFDA2, 0xF474EF38, 0x8789BDC2,
163: 0x5366F9C3, 0xC8B38E74, 0xB475F255, 0x46FCD9B9, 0x7AEB2661,
164: 0x8B1DDF84, 0x846A0E79, 0x915F95E2, 0x466E598E, 0x20B45770,
165: 0x8CD55591, 0xC902DE4C, 0xB90BACE1, 0xBB8205D0, 0x11A86248,
166: 0x7574A99E, 0xB77F19B6, 0xE0A9DC09, 0x662D09A1, 0xC4324633,
167: 0xE85A1F02, 0x09F0BE8C, 0x4A99A025, 0x1D6EFE10, 0x1AB93D1D,
168: 0x0BA5A4DF, 0xA186F20F, 0x2868F169, 0xDCB7DA83, 0x573906FE,
169: 0xA1E2CE9B, 0x4FCD7F52, 0x50115E01, 0xA70683FA, 0xA002B5C4,
170: 0x0DE6D027, 0x9AF88C27, 0x773F8641, 0xC3604C06, 0x61A806B5,
171: 0xF0177A28, 0xC0F586E0, 0x006058AA, 0x30DC7D62, 0x11E69ED7,
172: 0x2338EA63, 0x53C2DD94, 0xC2C21634, 0xBBCBEE56, 0x90BCB6DE,
173: 0xEBFC7DA1, 0xCE591D76, 0x6F05E409, 0x4B7C0188, 0x39720A3D,
174: 0x7C927C24, 0x86E3725F, 0x724D9DB9, 0x1AC15BB4, 0xD39EB8FC,
175: 0xED545578, 0x08FCA5B5, 0xD83D7CD3, 0x4DAD0FC4, 0x1E50EF5E,
176: 0xB161E6F8, 0xA28514D9, 0x6C51133C, 0x6FD5C7E7, 0x56E14EC4,
177: 0x362ABFCE, 0xDDC6C837, 0xD79A3234, 0x92638212, 0x670EFA8E,
178: 0x406000E0 },
179:
180: KS3 = { 0x3A39CE37, 0xD3FAF5CF, 0xABC27737, 0x5AC52D1B, 0x5CB0679E,
181: 0x4FA33742, 0xD3822740, 0x99BC9BBE, 0xD5118E9D, 0xBF0F7315,
182: 0xD62D1C7E, 0xC700C47B, 0xB78C1B6B, 0x21A19045, 0xB26EB1BE,
183: 0x6A366EB4, 0x5748AB2F, 0xBC946E79, 0xC6A376D2, 0x6549C2C8,
184: 0x530FF8EE, 0x468DDE7D, 0xD5730A1D, 0x4CD04DC6, 0x2939BBDB,
185: 0xA9BA4650, 0xAC9526E8, 0xBE5EE304, 0xA1FAD5F0, 0x6A2D519A,
186: 0x63EF8CE2, 0x9A86EE22, 0xC089C2B8, 0x43242EF6, 0xA51E03AA,
187: 0x9CF2D0A4, 0x83C061BA, 0x9BE96A4D, 0x8FE51550, 0xBA645BD6,
188: 0x2826A2F9, 0xA73A3AE1, 0x4BA99586, 0xEF5562E9, 0xC72FEFD3,
189: 0xF752F7DA, 0x3F046F69, 0x77FA0A59, 0x80E4A915, 0x87B08601,
190: 0x9B09E6AD, 0x3B3EE593, 0xE990FD5A, 0x9E34D797, 0x2CF0B7D9,
191: 0x022B8B51, 0x96D5AC3A, 0x017DA67D, 0xD1CF3ED6, 0x7C7D2D28,
192: 0x1F9F25CF, 0xADF2B89B, 0x5AD6B472, 0x5A88F54C, 0xE029AC71,
193: 0xE019A5E6, 0x47B0ACFD, 0xED93FA9B, 0xE8D3C48D, 0x283B57CC,
194: 0xF8D56629, 0x79132E28, 0x785F0191, 0xED756055, 0xF7960E44,
195: 0xE3D35E8C, 0x15056DD4, 0x88F46DBA, 0x03A16125, 0x0564F0BD,
196: 0xC3EB9E15, 0x3C9057A2, 0x97271AEC, 0xA93A072A, 0x1B3F6D9B,
197: 0x1E6321F5, 0xF59C66FB, 0x26DCF319, 0x7533D928, 0xB155FDF5,
198: 0x03563482, 0x8ABA3CBB, 0x28517711, 0xC20AD9F8, 0xABCC5167,
199: 0xCCAD925F, 0x4DE81751, 0x3830DC8E, 0x379D5862, 0x9320F991,
200: 0xEA7A90C2, 0xFB3E7BCE, 0x5121CE64, 0x774FBE32, 0xA8B6E37E,
201: 0xC3293D46, 0x48DE5369, 0x6413E680, 0xA2AE0810, 0xDD6DB224,
202: 0x69852DFD, 0x09072166, 0xB39A460A, 0x6445C0DD, 0x586CDECF,
203: 0x1C20C8AE, 0x5BBEF7DD, 0x1B588D40, 0xCCD2017F, 0x6BB4E3BB,
204: 0xDDA26A7E, 0x3A59FF45, 0x3E350A44, 0xBCB4CDD5, 0x72EACEA8,
205: 0xFA6484BB, 0x8D6612AE, 0xBF3C6F47, 0xD29BE463, 0x542F5D9E,
206: 0xAEC2771B, 0xF64E6370, 0x740E0D8D, 0xE75B1357, 0xF8721671,
207: 0xAF537D5D, 0x4040CB08, 0x4EB4E2CC, 0x34D2466A, 0x0115AF84,
208: 0xE1B00428, 0x95983A1D, 0x06B89FB4, 0xCE6EA048, 0x6F3F3B82,
209: 0x3520AB82, 0x011A1D4B, 0x277227F8, 0x611560B1, 0xE7933FDC,
210: 0xBB3A792B, 0x344525BD, 0xA08839E1, 0x51CE794B, 0x2F32C9B7,
211: 0xA01FBAC9, 0xE01CC87E, 0xBCC7D1F6, 0xCF0111C3, 0xA1E8AAC7,
212: 0x1A908749, 0xD44FBD9A, 0xD0DADECB, 0xD50ADA38, 0x0339C32A,
213: 0xC6913667, 0x8DF9317C, 0xE0B12B4F, 0xF79E59B7, 0x43F5BB3A,
214: 0xF2D519FF, 0x27D9459C, 0xBF97222C, 0x15E6FC2A, 0x0F91FC71,
215: 0x9B941525, 0xFAE59361, 0xCEB69CEB, 0xC2A86459, 0x12BAA8D1,
216: 0xB6C1075E, 0xE3056A0C, 0x10D25065, 0xCB03A442, 0xE0EC6E0E,
217: 0x1698DB3B, 0x4C98A0BE, 0x3278E964, 0x9F1F9532, 0xE0D392DF,
218: 0xD3A0342B, 0x8971F21E, 0x1B0A7441, 0x4BA3348C, 0xC5BE7120,
219: 0xC37632D8, 0xDF359F8D, 0x9B992F2E, 0xE60B6F47, 0x0FE3F11D,
220: 0xE54CDA54, 0x1EDAD891, 0xCE6279CF, 0xCD3E7E6F, 0x1618B166,
221: 0xFD2C1D05, 0x848FD2C5, 0xF6FB2299, 0xF523F357, 0xA6327623,
222: 0x93A83531, 0x56CCCD02, 0xACF08162, 0x5A75EBB5, 0x6E163697,
223: 0x88D273CC, 0xDE966292, 0x81B949D0, 0x4C50901B, 0x71C65614,
224: 0xE6C6C7BD, 0x327A140A, 0x45E1D006, 0xC3F27B9A, 0xC9AA53FD,
225: 0x62A80F00, 0xBB25BFE2, 0x35BDD2F6, 0x71126905, 0xB2040222,
226: 0xB6CBCF7C, 0xCD769C2B, 0x53113EC0, 0x1640E3D3, 0x38ABBD60,
227: 0x2547ADF0, 0xBA38209C, 0xF746CE76, 0x77AFA1C5, 0x20756060,
228: 0x85CBFE4E, 0x8AE88DD8, 0x7AAAF9B0, 0x4CF9AA7E, 0x1948C25C,
229: 0x02FB8A8C, 0x01C36AE4, 0xD6EBE1F9, 0x90D4F869, 0xA65CDEA0,
230: 0x3F09252D, 0xC208E69F, 0xB74E6132, 0xCE77E25B, 0x578FDFE3,
231: 0x3AC372E6 };
232:
233: //====================================
234: // Useful constants
235: //====================================
236:
237: private static final int ROUNDS = 16;
238: private static final int BLOCK_SIZE = 8; // bytes = 64 bits
239: private static final int SBOX_SK = 256;
240: private static final int P_SZ = ROUNDS + 2;
241:
242: private final int[] S0, S1, S2, S3; // the s-boxes
243: private final int[] P; // the p-array
244:
245: private boolean encrypting = false;
246:
247: private byte[] workingKey = null;
248:
249: public BlowfishEngine() {
250: S0 = new int[SBOX_SK];
251: S1 = new int[SBOX_SK];
252: S2 = new int[SBOX_SK];
253: S3 = new int[SBOX_SK];
254: P = new int[P_SZ];
255: }
256:
257: /**
258: * initialise a Blowfish cipher.
259: *
260: * @param encrypting whether or not we are for encryption.
261: * @param params the parameters required to set up the cipher.
262: * @exception IllegalArgumentException if the params argument is
263: * inappropriate.
264: */
265: public void init(boolean encrypting, CipherParameters params) {
266: if (params instanceof KeyParameter) {
267: this .encrypting = encrypting;
268: this .workingKey = ((KeyParameter) params).getKey();
269: setKey(this .workingKey);
270:
271: return;
272: }
273:
274: throw new IllegalArgumentException(
275: "invalid parameter passed to Blowfish init - "
276: + params.getClass().getName());
277: }
278:
279: public String getAlgorithmName() {
280: return "Blowfish";
281: }
282:
283: public final int processBlock(byte[] in, int inOff, byte[] out,
284: int outOff) {
285: if (workingKey == null) {
286: throw new IllegalStateException("Blowfish not initialised");
287: }
288:
289: if ((inOff + BLOCK_SIZE) > in.length) {
290: throw new DataLengthException("input buffer too short");
291: }
292:
293: if ((outOff + BLOCK_SIZE) > out.length) {
294: throw new DataLengthException("output buffer too short");
295: }
296:
297: if (encrypting) {
298: encryptBlock(in, inOff, out, outOff);
299: } else {
300: decryptBlock(in, inOff, out, outOff);
301: }
302:
303: return BLOCK_SIZE;
304: }
305:
306: public void reset() {
307: }
308:
309: public int getBlockSize() {
310: return BLOCK_SIZE;
311: }
312:
313: //==================================
314: // Private Implementation
315: //==================================
316:
317: private int F(int x) {
318: return (((S0[(x >>> 24)] + S1[(x >>> 16) & 0xff]) ^ S2[(x >>> 8) & 0xff]) + S3[x & 0xff]);
319: }
320:
321: /**
322: * apply the encryption cycle to each value pair in the table.
323: */
324: private void processTable(int xl, int xr, int[] table) {
325: int size = table.length;
326:
327: for (int s = 0; s < size; s += 2) {
328: xl ^= P[0];
329:
330: for (int i = 1; i < ROUNDS; i += 2) {
331: xr ^= F(xl) ^ P[i];
332: xl ^= F(xr) ^ P[i + 1];
333: }
334:
335: xr ^= P[ROUNDS + 1];
336:
337: table[s] = xr;
338: table[s + 1] = xl;
339:
340: xr = xl; // end of cycle swap
341: xl = table[s];
342: }
343: }
344:
345: private void setKey(byte[] key) {
346: /*
347: * - comments are from _Applied Crypto_, Schneier, p338
348: * please be careful comparing the two, AC numbers the
349: * arrays from 1, the enclosed code from 0.
350: *
351: * (1)
352: * Initialise the S-boxes and the P-array, with a fixed string
353: * This string contains the hexadecimal digits of pi (3.141...)
354: */
355: System.arraycopy(KS0, 0, S0, 0, SBOX_SK);
356: System.arraycopy(KS1, 0, S1, 0, SBOX_SK);
357: System.arraycopy(KS2, 0, S2, 0, SBOX_SK);
358: System.arraycopy(KS3, 0, S3, 0, SBOX_SK);
359:
360: System.arraycopy(KP, 0, P, 0, P_SZ);
361:
362: /*
363: * (2)
364: * Now, XOR P[0] with the first 32 bits of the key, XOR P[1] with the
365: * second 32-bits of the key, and so on for all bits of the key
366: * (up to P[17]). Repeatedly cycle through the key bits until the
367: * entire P-array has been XOR-ed with the key bits
368: */
369: int keyLength = key.length;
370: int keyIndex = 0;
371:
372: for (int i = 0; i < P_SZ; i++) {
373: // get the 32 bits of the key, in 4 * 8 bit chunks
374: int data = 0x0000000;
375: for (int j = 0; j < 4; j++) {
376: // create a 32 bit block
377: data = (data << 8) | (key[keyIndex++] & 0xff);
378:
379: // wrap when we get to the end of the key
380: if (keyIndex >= keyLength) {
381: keyIndex = 0;
382: }
383: }
384: // XOR the newly created 32 bit chunk onto the P-array
385: P[i] ^= data;
386: }
387:
388: /*
389: * (3)
390: * Encrypt the all-zero string with the Blowfish algorithm, using
391: * the subkeys described in (1) and (2)
392: *
393: * (4)
394: * Replace P1 and P2 with the output of step (3)
395: *
396: * (5)
397: * Encrypt the output of step(3) using the Blowfish algorithm,
398: * with the modified subkeys.
399: *
400: * (6)
401: * Replace P3 and P4 with the output of step (5)
402: *
403: * (7)
404: * Continue the process, replacing all elements of the P-array
405: * and then all four S-boxes in order, with the output of the
406: * continuously changing Blowfish algorithm
407: */
408:
409: processTable(0, 0, P);
410: processTable(P[P_SZ - 2], P[P_SZ - 1], S0);
411: processTable(S0[SBOX_SK - 2], S0[SBOX_SK - 1], S1);
412: processTable(S1[SBOX_SK - 2], S1[SBOX_SK - 1], S2);
413: processTable(S2[SBOX_SK - 2], S2[SBOX_SK - 1], S3);
414: }
415:
416: /**
417: * Encrypt the given input starting at the given offset and place
418: * the result in the provided buffer starting at the given offset.
419: * The input will be an exact multiple of our blocksize.
420: */
421: private void encryptBlock(byte[] src, int srcIndex, byte[] dst,
422: int dstIndex) {
423: int xl = BytesTo32bits(src, srcIndex);
424: int xr = BytesTo32bits(src, srcIndex + 4);
425:
426: xl ^= P[0];
427:
428: for (int i = 1; i < ROUNDS; i += 2) {
429: xr ^= F(xl) ^ P[i];
430: xl ^= F(xr) ^ P[i + 1];
431: }
432:
433: xr ^= P[ROUNDS + 1];
434:
435: Bits32ToBytes(xr, dst, dstIndex);
436: Bits32ToBytes(xl, dst, dstIndex + 4);
437: }
438:
439: /**
440: * Decrypt the given input starting at the given offset and place
441: * the result in the provided buffer starting at the given offset.
442: * The input will be an exact multiple of our blocksize.
443: */
444: private void decryptBlock(byte[] src, int srcIndex, byte[] dst,
445: int dstIndex) {
446: int xl = BytesTo32bits(src, srcIndex);
447: int xr = BytesTo32bits(src, srcIndex + 4);
448:
449: xl ^= P[ROUNDS + 1];
450:
451: for (int i = ROUNDS; i > 0; i -= 2) {
452: xr ^= F(xl) ^ P[i];
453: xl ^= F(xr) ^ P[i - 1];
454: }
455:
456: xr ^= P[0];
457:
458: Bits32ToBytes(xr, dst, dstIndex);
459: Bits32ToBytes(xl, dst, dstIndex + 4);
460: }
461:
462: private int BytesTo32bits(byte[] b, int i) {
463: return ((b[i] & 0xff) << 24) | ((b[i + 1] & 0xff) << 16)
464: | ((b[i + 2] & 0xff) << 8) | ((b[i + 3] & 0xff));
465: }
466:
467: private void Bits32ToBytes(int in, byte[] b, int offset) {
468: b[offset + 3] = (byte) in;
469: b[offset + 2] = (byte) (in >> 8);
470: b[offset + 1] = (byte) (in >> 16);
471: b[offset] = (byte) (in >> 24);
472: }
473: }
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