release/src/router/nettle/blowfish.c

   1 /* blowfish.c
   2  *
   3  * The blowfish block cipher.
   4  *
   5  * For a description of the algorithm, see:
   6  *   Bruce Schneier: Applied Cryptography. John Wiley & Sons, 1996.
   7  *   ISBN 0-471-11709-9. Pages 336 ff.
   8  */
   9
  10 /* nettle, low-level cryptographics library
  11  *
  12  * Copyright (C) 2010  Simon Josefsson
  13  * Copyright (C) 1998, 2001, 2002, 2003 Free Software Foundation, Inc.
  14  *
  15  * The nettle library is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU Lesser General Public License as published by
  17  * the Free Software Foundation; either version 2.1 of the License, or (at your
  18  * option) any later version.
  19  *
  20  * The nettle library is distributed in the hope that it will be useful, but
  21  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  22  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  23  * License for more details.
  24  *
  25  * You should have received a copy of the GNU Lesser General Public License
  26  * along with the nettle library; see the file COPYING.LIB.  If not, write to
  27  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  28  * MA 02111-1301, USA.
  29  */
  30
  31 /* This file is derived from cipher/blowfish.c in Libgcrypt v1.4.6.
  32    The adaption to Nettle was made by Simon Josefsson on 2010-11-23.
  33    Changes include removing the selftest, renaming u32/byte types to
  34    uint32_t/uint8_t, renaming BLOWFISH_ROUNDS to _BLOWFISH_ROUNDS
  35    (from Nettle's blowfish.h), dropping the libgcrypt wrapper
  36    functions, fixing #include's, remove support for non-16 rounds
  37    (there are no test vectors), adding FOR_BLOCK iterations, and
  38    running indent on the code. */
  39
  40 #if HAVE_CONFIG_H
  41 #include "config.h"
  42 #endif
  43
  44 #include <assert.h>
  45
  46 #include "blowfish.h"
  47
  48 #include "macros.h"
  49
  50 /* precomputed S boxes */
  51 static const struct blowfish_ctx
  52 initial_ctx = {
  53   {
  54     { /* ks0 */
  55       0xD1310BA6, 0x98DFB5AC, 0x2FFD72DB, 0xD01ADFB7, 0xB8E1AFED, 0x6A267E96,
  56       0xBA7C9045, 0xF12C7F99, 0x24A19947, 0xB3916CF7, 0x0801F2E2, 0x858EFC16,
  57       0x636920D8, 0x71574E69, 0xA458FEA3, 0xF4933D7E, 0x0D95748F, 0x728EB658,
  58       0x718BCD58, 0x82154AEE, 0x7B54A41D, 0xC25A59B5, 0x9C30D539, 0x2AF26013,
  59       0xC5D1B023, 0x286085F0, 0xCA417918, 0xB8DB38EF, 0x8E79DCB0, 0x603A180E,
  60       0x6C9E0E8B, 0xB01E8A3E, 0xD71577C1, 0xBD314B27, 0x78AF2FDA, 0x55605C60,
  61       0xE65525F3, 0xAA55AB94, 0x57489862, 0x63E81440, 0x55CA396A, 0x2AAB10B6,
  62       0xB4CC5C34, 0x1141E8CE, 0xA15486AF, 0x7C72E993, 0xB3EE1411, 0x636FBC2A,
  63       0x2BA9C55D, 0x741831F6, 0xCE5C3E16, 0x9B87931E, 0xAFD6BA33, 0x6C24CF5C,
  64       0x7A325381, 0x28958677, 0x3B8F4898, 0x6B4BB9AF, 0xC4BFE81B, 0x66282193,
  65       0x61D809CC, 0xFB21A991, 0x487CAC60, 0x5DEC8032, 0xEF845D5D, 0xE98575B1,
  66       0xDC262302, 0xEB651B88, 0x23893E81, 0xD396ACC5, 0x0F6D6FF3, 0x83F44239,
  67       0x2E0B4482, 0xA4842004, 0x69C8F04A, 0x9E1F9B5E, 0x21C66842, 0xF6E96C9A,
  68       0x670C9C61, 0xABD388F0, 0x6A51A0D2, 0xD8542F68, 0x960FA728, 0xAB5133A3,
  69       0x6EEF0B6C, 0x137A3BE4, 0xBA3BF050, 0x7EFB2A98, 0xA1F1651D, 0x39AF0176,
  70       0x66CA593E, 0x82430E88, 0x8CEE8619, 0x456F9FB4, 0x7D84A5C3, 0x3B8B5EBE,
  71       0xE06F75D8, 0x85C12073, 0x401A449F, 0x56C16AA6, 0x4ED3AA62, 0x363F7706,
  72       0x1BFEDF72, 0x429B023D, 0x37D0D724, 0xD00A1248, 0xDB0FEAD3, 0x49F1C09B,
  73       0x075372C9, 0x80991B7B, 0x25D479D8, 0xF6E8DEF7, 0xE3FE501A, 0xB6794C3B,
  74       0x976CE0BD, 0x04C006BA, 0xC1A94FB6, 0x409F60C4, 0x5E5C9EC2, 0x196A2463,
  75       0x68FB6FAF, 0x3E6C53B5, 0x1339B2EB, 0x3B52EC6F, 0x6DFC511F, 0x9B30952C,
  76       0xCC814544, 0xAF5EBD09, 0xBEE3D004, 0xDE334AFD, 0x660F2807, 0x192E4BB3,
  77       0xC0CBA857, 0x45C8740F, 0xD20B5F39, 0xB9D3FBDB, 0x5579C0BD, 0x1A60320A,
  78       0xD6A100C6, 0x402C7279, 0x679F25FE, 0xFB1FA3CC, 0x8EA5E9F8, 0xDB3222F8,
  79       0x3C7516DF, 0xFD616B15, 0x2F501EC8, 0xAD0552AB, 0x323DB5FA, 0xFD238760,
  80       0x53317B48, 0x3E00DF82, 0x9E5C57BB, 0xCA6F8CA0, 0x1A87562E, 0xDF1769DB,
  81       0xD542A8F6, 0x287EFFC3, 0xAC6732C6, 0x8C4F5573, 0x695B27B0, 0xBBCA58C8,
  82       0xE1FFA35D, 0xB8F011A0, 0x10FA3D98, 0xFD2183B8, 0x4AFCB56C, 0x2DD1D35B,
  83       0x9A53E479, 0xB6F84565, 0xD28E49BC, 0x4BFB9790, 0xE1DDF2DA, 0xA4CB7E33,
  84       0x62FB1341, 0xCEE4C6E8, 0xEF20CADA, 0x36774C01, 0xD07E9EFE, 0x2BF11FB4,
  85       0x95DBDA4D, 0xAE909198, 0xEAAD8E71, 0x6B93D5A0, 0xD08ED1D0, 0xAFC725E0,
  86       0x8E3C5B2F, 0x8E7594B7, 0x8FF6E2FB, 0xF2122B64, 0x8888B812, 0x900DF01C,
  87       0x4FAD5EA0, 0x688FC31C, 0xD1CFF191, 0xB3A8C1AD, 0x2F2F2218, 0xBE0E1777,
  88       0xEA752DFE, 0x8B021FA1, 0xE5A0CC0F, 0xB56F74E8, 0x18ACF3D6, 0xCE89E299,
  89       0xB4A84FE0, 0xFD13E0B7, 0x7CC43B81, 0xD2ADA8D9, 0x165FA266, 0x80957705,
  90       0x93CC7314, 0x211A1477, 0xE6AD2065, 0x77B5FA86, 0xC75442F5, 0xFB9D35CF,
  91       0xEBCDAF0C, 0x7B3E89A0, 0xD6411BD3, 0xAE1E7E49, 0x00250E2D, 0x2071B35E,
  92       0x226800BB, 0x57B8E0AF, 0x2464369B, 0xF009B91E, 0x5563911D, 0x59DFA6AA,
  93       0x78C14389, 0xD95A537F, 0x207D5BA2, 0x02E5B9C5, 0x83260376, 0x6295CFA9,
  94       0x11C81968, 0x4E734A41, 0xB3472DCA, 0x7B14A94A, 0x1B510052, 0x9A532915,
  95       0xD60F573F, 0xBC9BC6E4, 0x2B60A476, 0x81E67400, 0x08BA6FB5, 0x571BE91F,
  96       0xF296EC6B, 0x2A0DD915, 0xB6636521, 0xE7B9F9B6, 0xFF34052E, 0xC5855664,
  97       0x53B02D5D, 0xA99F8FA1, 0x08BA4799, 0x6E85076A
  98     },
  99     { /* ks1 */
 100       0x4B7A70E9, 0xB5B32944, 0xDB75092E, 0xC4192623, 0xAD6EA6B0, 0x49A7DF7D,
 101       0x9CEE60B8, 0x8FEDB266, 0xECAA8C71, 0x699A17FF, 0x5664526C, 0xC2B19EE1,
 102       0x193602A5, 0x75094C29, 0xA0591340, 0xE4183A3E, 0x3F54989A, 0x5B429D65,
 103       0x6B8FE4D6, 0x99F73FD6, 0xA1D29C07, 0xEFE830F5, 0x4D2D38E6, 0xF0255DC1,
 104       0x4CDD2086, 0x8470EB26, 0x6382E9C6, 0x021ECC5E, 0x09686B3F, 0x3EBAEFC9,
 105       0x3C971814, 0x6B6A70A1, 0x687F3584, 0x52A0E286, 0xB79C5305, 0xAA500737,
 106       0x3E07841C, 0x7FDEAE5C, 0x8E7D44EC, 0x5716F2B8, 0xB03ADA37, 0xF0500C0D,
 107       0xF01C1F04, 0x0200B3FF, 0xAE0CF51A, 0x3CB574B2, 0x25837A58, 0xDC0921BD,
 108       0xD19113F9, 0x7CA92FF6, 0x94324773, 0x22F54701, 0x3AE5E581, 0x37C2DADC,
 109       0xC8B57634, 0x9AF3DDA7, 0xA9446146, 0x0FD0030E, 0xECC8C73E, 0xA4751E41,
 110       0xE238CD99, 0x3BEA0E2F, 0x3280BBA1, 0x183EB331, 0x4E548B38, 0x4F6DB908,
 111       0x6F420D03, 0xF60A04BF, 0x2CB81290, 0x24977C79, 0x5679B072, 0xBCAF89AF,
 112       0xDE9A771F, 0xD9930810, 0xB38BAE12, 0xDCCF3F2E, 0x5512721F, 0x2E6B7124,
 113       0x501ADDE6, 0x9F84CD87, 0x7A584718, 0x7408DA17, 0xBC9F9ABC, 0xE94B7D8C,
 114       0xEC7AEC3A, 0xDB851DFA, 0x63094366, 0xC464C3D2, 0xEF1C1847, 0x3215D908,
 115       0xDD433B37, 0x24C2BA16, 0x12A14D43, 0x2A65C451, 0x50940002, 0x133AE4DD,
 116       0x71DFF89E, 0x10314E55, 0x81AC77D6, 0x5F11199B, 0x043556F1, 0xD7A3C76B,
 117       0x3C11183B, 0x5924A509, 0xF28FE6ED, 0x97F1FBFA, 0x9EBABF2C, 0x1E153C6E,
 118       0x86E34570, 0xEAE96FB1, 0x860E5E0A, 0x5A3E2AB3, 0x771FE71C, 0x4E3D06FA,
 119       0x2965DCB9, 0x99E71D0F, 0x803E89D6, 0x5266C825, 0x2E4CC978, 0x9C10B36A,
 120       0xC6150EBA, 0x94E2EA78, 0xA5FC3C53, 0x1E0A2DF4, 0xF2F74EA7, 0x361D2B3D,
 121       0x1939260F, 0x19C27960, 0x5223A708, 0xF71312B6, 0xEBADFE6E, 0xEAC31F66,
 122       0xE3BC4595, 0xA67BC883, 0xB17F37D1, 0x018CFF28, 0xC332DDEF, 0xBE6C5AA5,
 123       0x65582185, 0x68AB9802, 0xEECEA50F, 0xDB2F953B, 0x2AEF7DAD, 0x5B6E2F84,
 124       0x1521B628, 0x29076170, 0xECDD4775, 0x619F1510, 0x13CCA830, 0xEB61BD96,
 125       0x0334FE1E, 0xAA0363CF, 0xB5735C90, 0x4C70A239, 0xD59E9E0B, 0xCBAADE14,
 126       0xEECC86BC, 0x60622CA7, 0x9CAB5CAB, 0xB2F3846E, 0x648B1EAF, 0x19BDF0CA,
 127       0xA02369B9, 0x655ABB50, 0x40685A32, 0x3C2AB4B3, 0x319EE9D5, 0xC021B8F7,
 128       0x9B540B19, 0x875FA099, 0x95F7997E, 0x623D7DA8, 0xF837889A, 0x97E32D77,
 129       0x11ED935F, 0x16681281, 0x0E358829, 0xC7E61FD6, 0x96DEDFA1, 0x7858BA99,
 130       0x57F584A5, 0x1B227263, 0x9B83C3FF, 0x1AC24696, 0xCDB30AEB, 0x532E3054,
 131       0x8FD948E4, 0x6DBC3128, 0x58EBF2EF, 0x34C6FFEA, 0xFE28ED61, 0xEE7C3C73,
 132       0x5D4A14D9, 0xE864B7E3, 0x42105D14, 0x203E13E0, 0x45EEE2B6, 0xA3AAABEA,
 133       0xDB6C4F15, 0xFACB4FD0, 0xC742F442, 0xEF6ABBB5, 0x654F3B1D, 0x41CD2105,
 134       0xD81E799E, 0x86854DC7, 0xE44B476A, 0x3D816250, 0xCF62A1F2, 0x5B8D2646,
 135       0xFC8883A0, 0xC1C7B6A3, 0x7F1524C3, 0x69CB7492, 0x47848A0B, 0x5692B285,
 136       0x095BBF00, 0xAD19489D, 0x1462B174, 0x23820E00, 0x58428D2A, 0x0C55F5EA,
 137       0x1DADF43E, 0x233F7061, 0x3372F092, 0x8D937E41, 0xD65FECF1, 0x6C223BDB,
 138       0x7CDE3759, 0xCBEE7460, 0x4085F2A7, 0xCE77326E, 0xA6078084, 0x19F8509E,
 139       0xE8EFD855, 0x61D99735, 0xA969A7AA, 0xC50C06C2, 0x5A04ABFC, 0x800BCADC,
 140       0x9E447A2E, 0xC3453484, 0xFDD56705, 0x0E1E9EC9, 0xDB73DBD3, 0x105588CD,
 141       0x675FDA79, 0xE3674340, 0xC5C43465, 0x713E38D8, 0x3D28F89E, 0xF16DFF20,
 142       0x153E21E7, 0x8FB03D4A, 0xE6E39F2B, 0xDB83ADF7
 143     },
 144     { /* ks2 */
 145       0xE93D5A68, 0x948140F7, 0xF64C261C, 0x94692934, 0x411520F7, 0x7602D4F7,
 146       0xBCF46B2E, 0xD4A20068, 0xD4082471, 0x3320F46A, 0x43B7D4B7, 0x500061AF,
 147       0x1E39F62E, 0x97244546, 0x14214F74, 0xBF8B8840, 0x4D95FC1D, 0x96B591AF,
 148       0x70F4DDD3, 0x66A02F45, 0xBFBC09EC, 0x03BD9785, 0x7FAC6DD0, 0x31CB8504,
 149       0x96EB27B3, 0x55FD3941, 0xDA2547E6, 0xABCA0A9A, 0x28507825, 0x530429F4,
 150       0x0A2C86DA, 0xE9B66DFB, 0x68DC1462, 0xD7486900, 0x680EC0A4, 0x27A18DEE,
 151       0x4F3FFEA2, 0xE887AD8C, 0xB58CE006, 0x7AF4D6B6, 0xAACE1E7C, 0xD3375FEC,
 152       0xCE78A399, 0x406B2A42, 0x20FE9E35, 0xD9F385B9, 0xEE39D7AB, 0x3B124E8B,
 153       0x1DC9FAF7, 0x4B6D1856, 0x26A36631, 0xEAE397B2, 0x3A6EFA74, 0xDD5B4332,
 154       0x6841E7F7, 0xCA7820FB, 0xFB0AF54E, 0xD8FEB397, 0x454056AC, 0xBA489527,
 155       0x55533A3A, 0x20838D87, 0xFE6BA9B7, 0xD096954B, 0x55A867BC, 0xA1159A58,
 156       0xCCA92963, 0x99E1DB33, 0xA62A4A56, 0x3F3125F9, 0x5EF47E1C, 0x9029317C,
 157       0xFDF8E802, 0x04272F70, 0x80BB155C, 0x05282CE3, 0x95C11548, 0xE4C66D22,
 158       0x48C1133F, 0xC70F86DC, 0x07F9C9EE, 0x41041F0F, 0x404779A4, 0x5D886E17,
 159       0x325F51EB, 0xD59BC0D1, 0xF2BCC18F, 0x41113564, 0x257B7834, 0x602A9C60,
 160       0xDFF8E8A3, 0x1F636C1B, 0x0E12B4C2, 0x02E1329E, 0xAF664FD1, 0xCAD18115,
 161       0x6B2395E0, 0x333E92E1, 0x3B240B62, 0xEEBEB922, 0x85B2A20E, 0xE6BA0D99,
 162       0xDE720C8C, 0x2DA2F728, 0xD0127845, 0x95B794FD, 0x647D0862, 0xE7CCF5F0,
 163       0x5449A36F, 0x877D48FA, 0xC39DFD27, 0xF33E8D1E, 0x0A476341, 0x992EFF74,
 164       0x3A6F6EAB, 0xF4F8FD37, 0xA812DC60, 0xA1EBDDF8, 0x991BE14C, 0xDB6E6B0D,
 165       0xC67B5510, 0x6D672C37, 0x2765D43B, 0xDCD0E804, 0xF1290DC7, 0xCC00FFA3,
 166       0xB5390F92, 0x690FED0B, 0x667B9FFB, 0xCEDB7D9C, 0xA091CF0B, 0xD9155EA3,
 167       0xBB132F88, 0x515BAD24, 0x7B9479BF, 0x763BD6EB, 0x37392EB3, 0xCC115979,
 168       0x8026E297, 0xF42E312D, 0x6842ADA7, 0xC66A2B3B, 0x12754CCC, 0x782EF11C,
 169       0x6A124237, 0xB79251E7, 0x06A1BBE6, 0x4BFB6350, 0x1A6B1018, 0x11CAEDFA,
 170       0x3D25BDD8, 0xE2E1C3C9, 0x44421659, 0x0A121386, 0xD90CEC6E, 0xD5ABEA2A,
 171       0x64AF674E, 0xDA86A85F, 0xBEBFE988, 0x64E4C3FE, 0x9DBC8057, 0xF0F7C086,
 172       0x60787BF8, 0x6003604D, 0xD1FD8346, 0xF6381FB0, 0x7745AE04, 0xD736FCCC,
 173       0x83426B33, 0xF01EAB71, 0xB0804187, 0x3C005E5F, 0x77A057BE, 0xBDE8AE24,
 174       0x55464299, 0xBF582E61, 0x4E58F48F, 0xF2DDFDA2, 0xF474EF38, 0x8789BDC2,
 175       0x5366F9C3, 0xC8B38E74, 0xB475F255, 0x46FCD9B9, 0x7AEB2661, 0x8B1DDF84,
 176       0x846A0E79, 0x915F95E2, 0x466E598E, 0x20B45770, 0x8CD55591, 0xC902DE4C,
 177       0xB90BACE1, 0xBB8205D0, 0x11A86248, 0x7574A99E, 0xB77F19B6, 0xE0A9DC09,
 178       0x662D09A1, 0xC4324633, 0xE85A1F02, 0x09F0BE8C, 0x4A99A025, 0x1D6EFE10,
 179       0x1AB93D1D, 0x0BA5A4DF, 0xA186F20F, 0x2868F169, 0xDCB7DA83, 0x573906FE,
 180       0xA1E2CE9B, 0x4FCD7F52, 0x50115E01, 0xA70683FA, 0xA002B5C4, 0x0DE6D027,
 181       0x9AF88C27, 0x773F8641, 0xC3604C06, 0x61A806B5, 0xF0177A28, 0xC0F586E0,
 182       0x006058AA, 0x30DC7D62, 0x11E69ED7, 0x2338EA63, 0x53C2DD94, 0xC2C21634,
 183       0xBBCBEE56, 0x90BCB6DE, 0xEBFC7DA1, 0xCE591D76, 0x6F05E409, 0x4B7C0188,
 184       0x39720A3D, 0x7C927C24, 0x86E3725F, 0x724D9DB9, 0x1AC15BB4, 0xD39EB8FC,
 185       0xED545578, 0x08FCA5B5, 0xD83D7CD3, 0x4DAD0FC4, 0x1E50EF5E, 0xB161E6F8,
 186       0xA28514D9, 0x6C51133C, 0x6FD5C7E7, 0x56E14EC4, 0x362ABFCE, 0xDDC6C837,
 187       0xD79A3234, 0x92638212, 0x670EFA8E, 0x406000E0
 188     },
 189     { /* ks3 */
 190       0x3A39CE37, 0xD3FAF5CF, 0xABC27737, 0x5AC52D1B, 0x5CB0679E, 0x4FA33742,
 191       0xD3822740, 0x99BC9BBE, 0xD5118E9D, 0xBF0F7315, 0xD62D1C7E, 0xC700C47B,
 192       0xB78C1B6B, 0x21A19045, 0xB26EB1BE, 0x6A366EB4, 0x5748AB2F, 0xBC946E79,
 193       0xC6A376D2, 0x6549C2C8, 0x530FF8EE, 0x468DDE7D, 0xD5730A1D, 0x4CD04DC6,
 194       0x2939BBDB, 0xA9BA4650, 0xAC9526E8, 0xBE5EE304, 0xA1FAD5F0, 0x6A2D519A,
 195       0x63EF8CE2, 0x9A86EE22, 0xC089C2B8, 0x43242EF6, 0xA51E03AA, 0x9CF2D0A4,
 196       0x83C061BA, 0x9BE96A4D, 0x8FE51550, 0xBA645BD6, 0x2826A2F9, 0xA73A3AE1,
 197       0x4BA99586, 0xEF5562E9, 0xC72FEFD3, 0xF752F7DA, 0x3F046F69, 0x77FA0A59,
 198       0x80E4A915, 0x87B08601, 0x9B09E6AD, 0x3B3EE593, 0xE990FD5A, 0x9E34D797,
 199       0x2CF0B7D9, 0x022B8B51, 0x96D5AC3A, 0x017DA67D, 0xD1CF3ED6, 0x7C7D2D28,
 200       0x1F9F25CF, 0xADF2B89B, 0x5AD6B472, 0x5A88F54C, 0xE029AC71, 0xE019A5E6,
 201       0x47B0ACFD, 0xED93FA9B, 0xE8D3C48D, 0x283B57CC, 0xF8D56629, 0x79132E28,
 202       0x785F0191, 0xED756055, 0xF7960E44, 0xE3D35E8C, 0x15056DD4, 0x88F46DBA,
 203       0x03A16125, 0x0564F0BD, 0xC3EB9E15, 0x3C9057A2, 0x97271AEC, 0xA93A072A,
 204       0x1B3F6D9B, 0x1E6321F5, 0xF59C66FB, 0x26DCF319, 0x7533D928, 0xB155FDF5,
 205       0x03563482, 0x8ABA3CBB, 0x28517711, 0xC20AD9F8, 0xABCC5167, 0xCCAD925F,
 206       0x4DE81751, 0x3830DC8E, 0x379D5862, 0x9320F991, 0xEA7A90C2, 0xFB3E7BCE,
 207       0x5121CE64, 0x774FBE32, 0xA8B6E37E, 0xC3293D46, 0x48DE5369, 0x6413E680,
 208       0xA2AE0810, 0xDD6DB224, 0x69852DFD, 0x09072166, 0xB39A460A, 0x6445C0DD,
 209       0x586CDECF, 0x1C20C8AE, 0x5BBEF7DD, 0x1B588D40, 0xCCD2017F, 0x6BB4E3BB,
 210       0xDDA26A7E, 0x3A59FF45, 0x3E350A44, 0xBCB4CDD5, 0x72EACEA8, 0xFA6484BB,
 211       0x8D6612AE, 0xBF3C6F47, 0xD29BE463, 0x542F5D9E, 0xAEC2771B, 0xF64E6370,
 212       0x740E0D8D, 0xE75B1357, 0xF8721671, 0xAF537D5D, 0x4040CB08, 0x4EB4E2CC,
 213       0x34D2466A, 0x0115AF84, 0xE1B00428, 0x95983A1D, 0x06B89FB4, 0xCE6EA048,
 214       0x6F3F3B82, 0x3520AB82, 0x011A1D4B, 0x277227F8, 0x611560B1, 0xE7933FDC,
 215       0xBB3A792B, 0x344525BD, 0xA08839E1, 0x51CE794B, 0x2F32C9B7, 0xA01FBAC9,
 216       0xE01CC87E, 0xBCC7D1F6, 0xCF0111C3, 0xA1E8AAC7, 0x1A908749, 0xD44FBD9A,
 217       0xD0DADECB, 0xD50ADA38, 0x0339C32A, 0xC6913667, 0x8DF9317C, 0xE0B12B4F,
 218       0xF79E59B7, 0x43F5BB3A, 0xF2D519FF, 0x27D9459C, 0xBF97222C, 0x15E6FC2A,
 219       0x0F91FC71, 0x9B941525, 0xFAE59361, 0xCEB69CEB, 0xC2A86459, 0x12BAA8D1,
 220       0xB6C1075E, 0xE3056A0C, 0x10D25065, 0xCB03A442, 0xE0EC6E0E, 0x1698DB3B,
 221       0x4C98A0BE, 0x3278E964, 0x9F1F9532, 0xE0D392DF, 0xD3A0342B, 0x8971F21E,
 222       0x1B0A7441, 0x4BA3348C, 0xC5BE7120, 0xC37632D8, 0xDF359F8D, 0x9B992F2E,
 223       0xE60B6F47, 0x0FE3F11D, 0xE54CDA54, 0x1EDAD891, 0xCE6279CF, 0xCD3E7E6F,
 224       0x1618B166, 0xFD2C1D05, 0x848FD2C5, 0xF6FB2299, 0xF523F357, 0xA6327623,
 225       0x93A83531, 0x56CCCD02, 0xACF08162, 0x5A75EBB5, 0x6E163697, 0x88D273CC,
 226       0xDE966292, 0x81B949D0, 0x4C50901B, 0x71C65614, 0xE6C6C7BD, 0x327A140A,
 227       0x45E1D006, 0xC3F27B9A, 0xC9AA53FD, 0x62A80F00, 0xBB25BFE2, 0x35BDD2F6,
 228       0x71126905, 0xB2040222, 0xB6CBCF7C, 0xCD769C2B, 0x53113EC0, 0x1640E3D3,
 229       0x38ABBD60, 0x2547ADF0, 0xBA38209C, 0xF746CE76, 0x77AFA1C5, 0x20756060,
 230       0x85CBFE4E, 0x8AE88DD8, 0x7AAAF9B0, 0x4CF9AA7E, 0x1948C25C, 0x02FB8A8C,
 231       0x01C36AE4, 0xD6EBE1F9, 0x90D4F869, 0xA65CDEA0, 0x3F09252D, 0xC208E69F,
 232       0xB74E6132, 0xCE77E25B, 0x578FDFE3, 0x3AC372E6
 233     }
 234   },
 235   { /* ps */
 236     0x243F6A88, 0x85A308D3, 0x13198A2E, 0x03707344, 0xA4093822, 0x299F31D0,
 237     0x082EFA98, 0xEC4E6C89, 0x452821E6, 0x38D01377, 0xBE5466CF, 0x34E90C6C,
 238     0xC0AC29B7, 0xC97C50DD, 0x3F84D5B5, 0xB5470917, 0x9216D5D9, 0x8979FB1B
 239   }
 240 };
 241
 242 /* It's unfortunate to have to pick the bytes apart in the round
 243  * function. Werner's gnupg/libgcrypt code took the address of x, and
 244  * then read the individual bytes depending on the endianness. But
 245  * since xr and xl ought to live in registers, copying via memory is a
 246  * bad idea. */
 247
 248 #define F(c, x) \
 249   ((( (c->s[0][(x>>24) &0xff] + c->s[1][(x>>16) & 0xff]) \
 250       ^ c->s[2][(x>>8) & 0xff]) + c->s[3][x & 0xff]) & 0xffffffff)
 251
 252 #define R(c, l,r,i)  do { l ^= c->p[i]; r ^= F(c,l); } while(0)
 253
 254 static void
 255 encrypt (const struct blowfish_ctx *ctx, uint32_t * ret_xl,
 256             uint32_t * ret_xr)
 257 {
 258   uint32_t xl, xr;
 259
 260   xl = *ret_xl;
 261   xr = *ret_xr;
 262
 263   R (ctx, xl, xr, 0);
 264   R (ctx, xr, xl, 1);
 265   R (ctx, xl, xr, 2);
 266   R (ctx, xr, xl, 3);
 267   R (ctx, xl, xr, 4);
 268   R (ctx, xr, xl, 5);
 269   R (ctx, xl, xr, 6);
 270   R (ctx, xr, xl, 7);
 271   R (ctx, xl, xr, 8);
 272   R (ctx, xr, xl, 9);
 273   R (ctx, xl, xr, 10);
 274   R (ctx, xr, xl, 11);
 275   R (ctx, xl, xr, 12);
 276   R (ctx, xr, xl, 13);
 277   R (ctx, xl, xr, 14);
 278   R (ctx, xr, xl, 15);
 279
 280   xl ^= ctx->p[_BLOWFISH_ROUNDS];
 281   xr ^= ctx->p[_BLOWFISH_ROUNDS + 1];
 282
 283   *ret_xl = xr;
 284   *ret_xr = xl;
 285 }
 286
 287 static void
 288 decrypt (const struct blowfish_ctx *ctx, uint32_t * ret_xl, uint32_t * ret_xr)
 289 {
 290   uint32_t xl, xr;
 291
 292   xl = *ret_xl;
 293   xr = *ret_xr;
 294
 295   R (ctx, xl, xr, 17);
 296   R (ctx, xr, xl, 16);
 297   R (ctx, xl, xr, 15);
 298   R (ctx, xr, xl, 14);
 299   R (ctx, xl, xr, 13);
 300   R (ctx, xr, xl, 12);
 301   R (ctx, xl, xr, 11);
 302   R (ctx, xr, xl, 10);
 303   R (ctx, xl, xr, 9);
 304   R (ctx, xr, xl, 8);
 305   R (ctx, xl, xr, 7);
 306   R (ctx, xr, xl, 6);
 307   R (ctx, xl, xr, 5);
 308   R (ctx, xr, xl, 4);
 309   R (ctx, xl, xr, 3);
 310   R (ctx, xr, xl, 2);
 311
 312   xl ^= ctx->p[1];
 313   xr ^= ctx->p[0];
 314
 315   *ret_xl = xr;
 316   *ret_xr = xl;
 317 }
 318
 319 #undef F
 320 #undef R
 321
 322 void
 323 blowfish_encrypt (const struct blowfish_ctx *ctx,
 324                   unsigned length, uint8_t * dst, const uint8_t * src)
 325 {
 326   FOR_BLOCKS (length, dst, src, BLOWFISH_BLOCK_SIZE)
 327     {
 328       uint32_t d1, d2;
 329
 330       d1 = src[0] << 24 | src[1] << 16 | src[2] << 8 | src[3];
 331       d2 = src[4] << 24 | src[5] << 16 | src[6] << 8 | src[7];
 332       encrypt (ctx, &d1, &d2);
 333       dst[0] = (d1 >> 24) & 0xff;
 334       dst[1] = (d1 >> 16) & 0xff;
 335       dst[2] = (d1 >> 8) & 0xff;
 336       dst[3] = d1 & 0xff;
 337       dst[4] = (d2 >> 24) & 0xff;
 338       dst[5] = (d2 >> 16) & 0xff;
 339       dst[6] = (d2 >> 8) & 0xff;
 340       dst[7] = d2 & 0xff;
 341     }
 342 }
 343
 344 void
 345 blowfish_decrypt (const struct blowfish_ctx *ctx,
 346                   unsigned length, uint8_t * dst, const uint8_t * src)
 347 {
 348   FOR_BLOCKS (length, dst, src, BLOWFISH_BLOCK_SIZE)
 349     {
 350       uint32_t d1, d2;
 351
 352       d1 = src[0] << 24 | src[1] << 16 | src[2] << 8 | src[3];
 353       d2 = src[4] << 24 | src[5] << 16 | src[6] << 8 | src[7];
 354       decrypt (ctx, &d1, &d2);
 355       dst[0] = (d1 >> 24) & 0xff;
 356       dst[1] = (d1 >> 16) & 0xff;
 357       dst[2] = (d1 >> 8) & 0xff;
 358       dst[3] = d1 & 0xff;
 359       dst[4] = (d2 >> 24) & 0xff;
 360       dst[5] = (d2 >> 16) & 0xff;
 361       dst[6] = (d2 >> 8) & 0xff;
 362       dst[7] = d2 & 0xff;
 363     }
 364 }
 365
 366 int
 367 blowfish_set_key (struct blowfish_ctx *ctx,
 368                   unsigned length, const uint8_t * key)
 369 {
 370   int i, j;
 371   uint32_t data, datal, datar;
 372
 373   *ctx = initial_ctx;
 374
 375   for (i = j = 0; i < _BLOWFISH_ROUNDS + 2; i++)
 376     {
 377       data = (key[j] << 24) | (key[(j+1) % length] << 16)
 378         | (key[(j+2) % length] << 8) | key[(j+3) % length];
 379       ctx->p[i] ^= data;
 380       j = (j + 4) % length;
 381     }
 382
 383   datal = datar = 0;
 384   for (i = 0; i < _BLOWFISH_ROUNDS + 2; i += 2)
 385     {
 386       encrypt (ctx, &datal, &datar);
 387       ctx->p[i] = datal;
 388       ctx->p[i + 1] = datar;
 389     }
 390
 391   for (j = 0; j < 4; j++)
 392     for (i = 0; i < 256; i += 2)
 393       {
 394         encrypt (ctx, &datal, &datar);
 395         ctx->s[j][i] = datal;
 396         ctx->s[j][i + 1] = datar;
 397     }
 398
 399   /* Check for weak key.  A weak key is a key in which a value in
 400      the P-array (here c) occurs more than once per table.  */
 401   for (i = 0; i < 255; i++)
 402     {
 403       for (j = i + 1; j < 256; j++)
 404         {
 405           if ((ctx->s[0][i] == ctx->s[0][j])
 406               || (ctx->s[1][i] == ctx->s[1][j])
 407               || (ctx->s[2][i] == ctx->s[2][j])
 408               || (ctx->s[3][i] == ctx->s[3][j]))
 409             return 0;
 410         }
 411     }
 412
 413   return 1;
 414 }