/* blowfish.c  -  Blowfish encryption

 *  Copyright (C) 1998, 2001, 2002, 2003 Free Software Foundation, Inc.

 *

 * This file is part of Libgcrypt.

 *

 * Libgcrypt is free software; you can redistribute it and/or modify

 * it under the terms of the GNU Lesser general Public License as

 * published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * Libgcrypt is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 *

 * For a description of the algorithm, see:

 *   Bruce Schneier: Applied Cryptography. John Wiley & Sons, 1996.

 *   ISBN 0-471-11709-9. Pages 336 ff.

 */

/* Test values:

 * key    "abcdefghijklmnopqrstuvwxyz";

 * plain  "BLOWFISH"

 * cipher 32 4E D0 FE F4 13 A2 03

 *

 */

#include <config.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "types.h"

#include "g10lib.h"

#include "cipher.h"

#include "bufhelp.h"

#include "cipher-internal.h"

#define BLOWFISH_BLOCKSIZE 8

#define BLOWFISH_KEY_MIN_BITS 8

#define BLOWFISH_KEY_MAX_BITS 576

/* USE_AMD64_ASM indicates whether to use AMD64 assembly code. */

#undef USE_AMD64_ASM

#if defined(__x86_64__) && (defined(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS) || \

    defined(HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS))

# define USE_AMD64_ASM 1

#endif

/* USE_ARM_ASM indicates whether to use ARM assembly code. */

#undef USE_ARM_ASM

#if defined(__ARMEL__)

# if defined(HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS)

#  define USE_ARM_ASM 1

# endif

#endif

typedef struct {

    u32 s0[256];

    u32 s1[256];

    u32 s2[256];

    u32 s3[256];

    u32 p[16+2];

} BLOWFISH_context;

static gcry_err_code_t bf_setkey (void *c, const byte *key, unsigned keylen,

                                  cipher_bulk_ops_t *bulk_ops);

static unsigned int encrypt_block (void *bc, byte *outbuf, const byte *inbuf);

static unsigned int decrypt_block (void *bc, byte *outbuf, const byte *inbuf);

/* precomputed S boxes */

static const u32 ks0[256] = {

    0xD1310BA6,0x98DFB5AC,0x2FFD72DB,0xD01ADFB7,0xB8E1AFED,0x6A267E96,

    0xBA7C9045,0xF12C7F99,0x24A19947,0xB3916CF7,0x0801F2E2,0x858EFC16,

    0x636920D8,0x71574E69,0xA458FEA3,0xF4933D7E,0x0D95748F,0x728EB658,

    0x718BCD58,0x82154AEE,0x7B54A41D,0xC25A59B5,0x9C30D539,0x2AF26013,

    0xC5D1B023,0x286085F0,0xCA417918,0xB8DB38EF,0x8E79DCB0,0x603A180E,

    0x6C9E0E8B,0xB01E8A3E,0xD71577C1,0xBD314B27,0x78AF2FDA,0x55605C60,

    0xE65525F3,0xAA55AB94,0x57489862,0x63E81440,0x55CA396A,0x2AAB10B6,

    0xB4CC5C34,0x1141E8CE,0xA15486AF,0x7C72E993,0xB3EE1411,0x636FBC2A,

    0x2BA9C55D,0x741831F6,0xCE5C3E16,0x9B87931E,0xAFD6BA33,0x6C24CF5C,

    0x7A325381,0x28958677,0x3B8F4898,0x6B4BB9AF,0xC4BFE81B,0x66282193,

    0x61D809CC,0xFB21A991,0x487CAC60,0x5DEC8032,0xEF845D5D,0xE98575B1,

    0xDC262302,0xEB651B88,0x23893E81,0xD396ACC5,0x0F6D6FF3,0x83F44239,

    0x2E0B4482,0xA4842004,0x69C8F04A,0x9E1F9B5E,0x21C66842,0xF6E96C9A,

    0x670C9C61,0xABD388F0,0x6A51A0D2,0xD8542F68,0x960FA728,0xAB5133A3,

    0x6EEF0B6C,0x137A3BE4,0xBA3BF050,0x7EFB2A98,0xA1F1651D,0x39AF0176,

    0x66CA593E,0x82430E88,0x8CEE8619,0x456F9FB4,0x7D84A5C3,0x3B8B5EBE,

    0xE06F75D8,0x85C12073,0x401A449F,0x56C16AA6,0x4ED3AA62,0x363F7706,

    0x1BFEDF72,0x429B023D,0x37D0D724,0xD00A1248,0xDB0FEAD3,0x49F1C09B,

    0x075372C9,0x80991B7B,0x25D479D8,0xF6E8DEF7,0xE3FE501A,0xB6794C3B,

    0x976CE0BD,0x04C006BA,0xC1A94FB6,0x409F60C4,0x5E5C9EC2,0x196A2463,

    0x68FB6FAF,0x3E6C53B5,0x1339B2EB,0x3B52EC6F,0x6DFC511F,0x9B30952C,

    0xCC814544,0xAF5EBD09,0xBEE3D004,0xDE334AFD,0x660F2807,0x192E4BB3,

    0xC0CBA857,0x45C8740F,0xD20B5F39,0xB9D3FBDB,0x5579C0BD,0x1A60320A,

    0xD6A100C6,0x402C7279,0x679F25FE,0xFB1FA3CC,0x8EA5E9F8,0xDB3222F8,

    0x3C7516DF,0xFD616B15,0x2F501EC8,0xAD0552AB,0x323DB5FA,0xFD238760,

    0x53317B48,0x3E00DF82,0x9E5C57BB,0xCA6F8CA0,0x1A87562E,0xDF1769DB,

    0xD542A8F6,0x287EFFC3,0xAC6732C6,0x8C4F5573,0x695B27B0,0xBBCA58C8,

    0xE1FFA35D,0xB8F011A0,0x10FA3D98,0xFD2183B8,0x4AFCB56C,0x2DD1D35B,

    0x9A53E479,0xB6F84565,0xD28E49BC,0x4BFB9790,0xE1DDF2DA,0xA4CB7E33,

    0x62FB1341,0xCEE4C6E8,0xEF20CADA,0x36774C01,0xD07E9EFE,0x2BF11FB4,

    0x95DBDA4D,0xAE909198,0xEAAD8E71,0x6B93D5A0,0xD08ED1D0,0xAFC725E0,

    0x8E3C5B2F,0x8E7594B7,0x8FF6E2FB,0xF2122B64,0x8888B812,0x900DF01C,

    0x4FAD5EA0,0x688FC31C,0xD1CFF191,0xB3A8C1AD,0x2F2F2218,0xBE0E1777,

    0xEA752DFE,0x8B021FA1,0xE5A0CC0F,0xB56F74E8,0x18ACF3D6,0xCE89E299,

    0xB4A84FE0,0xFD13E0B7,0x7CC43B81,0xD2ADA8D9,0x165FA266,0x80957705,

    0x93CC7314,0x211A1477,0xE6AD2065,0x77B5FA86,0xC75442F5,0xFB9D35CF,

    0xEBCDAF0C,0x7B3E89A0,0xD6411BD3,0xAE1E7E49,0x00250E2D,0x2071B35E,

    0x226800BB,0x57B8E0AF,0x2464369B,0xF009B91E,0x5563911D,0x59DFA6AA,

    0x78C14389,0xD95A537F,0x207D5BA2,0x02E5B9C5,0x83260376,0x6295CFA9,

    0x11C81968,0x4E734A41,0xB3472DCA,0x7B14A94A,0x1B510052,0x9A532915,

    0xD60F573F,0xBC9BC6E4,0x2B60A476,0x81E67400,0x08BA6FB5,0x571BE91F,

    0xF296EC6B,0x2A0DD915,0xB6636521,0xE7B9F9B6,0xFF34052E,0xC5855664,

    0x53B02D5D,0xA99F8FA1,0x08BA4799,0x6E85076A };

static const u32 ks1[256] = {

    0x4B7A70E9,0xB5B32944,0xDB75092E,0xC4192623,0xAD6EA6B0,0x49A7DF7D,

    0x9CEE60B8,0x8FEDB266,0xECAA8C71,0x699A17FF,0x5664526C,0xC2B19EE1,

    0x193602A5,0x75094C29,0xA0591340,0xE4183A3E,0x3F54989A,0x5B429D65,

    0x6B8FE4D6,0x99F73FD6,0xA1D29C07,0xEFE830F5,0x4D2D38E6,0xF0255DC1,

    0x4CDD2086,0x8470EB26,0x6382E9C6,0x021ECC5E,0x09686B3F,0x3EBAEFC9,

    0x3C971814,0x6B6A70A1,0x687F3584,0x52A0E286,0xB79C5305,0xAA500737,

    0x3E07841C,0x7FDEAE5C,0x8E7D44EC,0x5716F2B8,0xB03ADA37,0xF0500C0D,

    0xF01C1F04,0x0200B3FF,0xAE0CF51A,0x3CB574B2,0x25837A58,0xDC0921BD,

    0xD19113F9,0x7CA92FF6,0x94324773,0x22F54701,0x3AE5E581,0x37C2DADC,

    0xC8B57634,0x9AF3DDA7,0xA9446146,0x0FD0030E,0xECC8C73E,0xA4751E41,

    0xE238CD99,0x3BEA0E2F,0x3280BBA1,0x183EB331,0x4E548B38,0x4F6DB908,

    0x6F420D03,0xF60A04BF,0x2CB81290,0x24977C79,0x5679B072,0xBCAF89AF,

    0xDE9A771F,0xD9930810,0xB38BAE12,0xDCCF3F2E,0x5512721F,0x2E6B7124,

    0x501ADDE6,0x9F84CD87,0x7A584718,0x7408DA17,0xBC9F9ABC,0xE94B7D8C,

    0xEC7AEC3A,0xDB851DFA,0x63094366,0xC464C3D2,0xEF1C1847,0x3215D908,

    0xDD433B37,0x24C2BA16,0x12A14D43,0x2A65C451,0x50940002,0x133AE4DD,

    0x71DFF89E,0x10314E55,0x81AC77D6,0x5F11199B,0x043556F1,0xD7A3C76B,

    0x3C11183B,0x5924A509,0xF28FE6ED,0x97F1FBFA,0x9EBABF2C,0x1E153C6E,

    0x86E34570,0xEAE96FB1,0x860E5E0A,0x5A3E2AB3,0x771FE71C,0x4E3D06FA,

    0x2965DCB9,0x99E71D0F,0x803E89D6,0x5266C825,0x2E4CC978,0x9C10B36A,

    0xC6150EBA,0x94E2EA78,0xA5FC3C53,0x1E0A2DF4,0xF2F74EA7,0x361D2B3D,

    0x1939260F,0x19C27960,0x5223A708,0xF71312B6,0xEBADFE6E,0xEAC31F66,

    0xE3BC4595,0xA67BC883,0xB17F37D1,0x018CFF28,0xC332DDEF,0xBE6C5AA5,

    0x65582185,0x68AB9802,0xEECEA50F,0xDB2F953B,0x2AEF7DAD,0x5B6E2F84,

    0x1521B628,0x29076170,0xECDD4775,0x619F1510,0x13CCA830,0xEB61BD96,

    0x0334FE1E,0xAA0363CF,0xB5735C90,0x4C70A239,0xD59E9E0B,0xCBAADE14,

    0xEECC86BC,0x60622CA7,0x9CAB5CAB,0xB2F3846E,0x648B1EAF,0x19BDF0CA,

    0xA02369B9,0x655ABB50,0x40685A32,0x3C2AB4B3,0x319EE9D5,0xC021B8F7,

    0x9B540B19,0x875FA099,0x95F7997E,0x623D7DA8,0xF837889A,0x97E32D77,

    0x11ED935F,0x16681281,0x0E358829,0xC7E61FD6,0x96DEDFA1,0x7858BA99,

    0x57F584A5,0x1B227263,0x9B83C3FF,0x1AC24696,0xCDB30AEB,0x532E3054,

    0x8FD948E4,0x6DBC3128,0x58EBF2EF,0x34C6FFEA,0xFE28ED61,0xEE7C3C73,

    0x5D4A14D9,0xE864B7E3,0x42105D14,0x203E13E0,0x45EEE2B6,0xA3AAABEA,

    0xDB6C4F15,0xFACB4FD0,0xC742F442,0xEF6ABBB5,0x654F3B1D,0x41CD2105,

    0xD81E799E,0x86854DC7,0xE44B476A,0x3D816250,0xCF62A1F2,0x5B8D2646,

    0xFC8883A0,0xC1C7B6A3,0x7F1524C3,0x69CB7492,0x47848A0B,0x5692B285,

    0x095BBF00,0xAD19489D,0x1462B174,0x23820E00,0x58428D2A,0x0C55F5EA,

    0x1DADF43E,0x233F7061,0x3372F092,0x8D937E41,0xD65FECF1,0x6C223BDB,

    0x7CDE3759,0xCBEE7460,0x4085F2A7,0xCE77326E,0xA6078084,0x19F8509E,

    0xE8EFD855,0x61D99735,0xA969A7AA,0xC50C06C2,0x5A04ABFC,0x800BCADC,

    0x9E447A2E,0xC3453484,0xFDD56705,0x0E1E9EC9,0xDB73DBD3,0x105588CD,

    0x675FDA79,0xE3674340,0xC5C43465,0x713E38D8,0x3D28F89E,0xF16DFF20,

    0x153E21E7,0x8FB03D4A,0xE6E39F2B,0xDB83ADF7 };

static const u32 ks2[256] = {

    0xE93D5A68,0x948140F7,0xF64C261C,0x94692934,0x411520F7,0x7602D4F7,

    0xBCF46B2E,0xD4A20068,0xD4082471,0x3320F46A,0x43B7D4B7,0x500061AF,

    0x1E39F62E,0x97244546,0x14214F74,0xBF8B8840,0x4D95FC1D,0x96B591AF,

    0x70F4DDD3,0x66A02F45,0xBFBC09EC,0x03BD9785,0x7FAC6DD0,0x31CB8504,

    0x96EB27B3,0x55FD3941,0xDA2547E6,0xABCA0A9A,0x28507825,0x530429F4,

    0x0A2C86DA,0xE9B66DFB,0x68DC1462,0xD7486900,0x680EC0A4,0x27A18DEE,

    0x4F3FFEA2,0xE887AD8C,0xB58CE006,0x7AF4D6B6,0xAACE1E7C,0xD3375FEC,

    0xCE78A399,0x406B2A42,0x20FE9E35,0xD9F385B9,0xEE39D7AB,0x3B124E8B,

    0x1DC9FAF7,0x4B6D1856,0x26A36631,0xEAE397B2,0x3A6EFA74,0xDD5B4332,

    0x6841E7F7,0xCA7820FB,0xFB0AF54E,0xD8FEB397,0x454056AC,0xBA489527,

    0x55533A3A,0x20838D87,0xFE6BA9B7,0xD096954B,0x55A867BC,0xA1159A58,

    0xCCA92963,0x99E1DB33,0xA62A4A56,0x3F3125F9,0x5EF47E1C,0x9029317C,

    0xFDF8E802,0x04272F70,0x80BB155C,0x05282CE3,0x95C11548,0xE4C66D22,

    0x48C1133F,0xC70F86DC,0x07F9C9EE,0x41041F0F,0x404779A4,0x5D886E17,

    0x325F51EB,0xD59BC0D1,0xF2BCC18F,0x41113564,0x257B7834,0x602A9C60,

    0xDFF8E8A3,0x1F636C1B,0x0E12B4C2,0x02E1329E,0xAF664FD1,0xCAD18115,

    0x6B2395E0,0x333E92E1,0x3B240B62,0xEEBEB922,0x85B2A20E,0xE6BA0D99,

    0xDE720C8C,0x2DA2F728,0xD0127845,0x95B794FD,0x647D0862,0xE7CCF5F0,

    0x5449A36F,0x877D48FA,0xC39DFD27,0xF33E8D1E,0x0A476341,0x992EFF74,

    0x3A6F6EAB,0xF4F8FD37,0xA812DC60,0xA1EBDDF8,0x991BE14C,0xDB6E6B0D,

    0xC67B5510,0x6D672C37,0x2765D43B,0xDCD0E804,0xF1290DC7,0xCC00FFA3,

    0xB5390F92,0x690FED0B,0x667B9FFB,0xCEDB7D9C,0xA091CF0B,0xD9155EA3,

    0xBB132F88,0x515BAD24,0x7B9479BF,0x763BD6EB,0x37392EB3,0xCC115979,

    0x8026E297,0xF42E312D,0x6842ADA7,0xC66A2B3B,0x12754CCC,0x782EF11C,

    0x6A124237,0xB79251E7,0x06A1BBE6,0x4BFB6350,0x1A6B1018,0x11CAEDFA,

    0x3D25BDD8,0xE2E1C3C9,0x44421659,0x0A121386,0xD90CEC6E,0xD5ABEA2A,

    0x64AF674E,0xDA86A85F,0xBEBFE988,0x64E4C3FE,0x9DBC8057,0xF0F7C086,

    0x60787BF8,0x6003604D,0xD1FD8346,0xF6381FB0,0x7745AE04,0xD736FCCC,

    0x83426B33,0xF01EAB71,0xB0804187,0x3C005E5F,0x77A057BE,0xBDE8AE24,

    0x55464299,0xBF582E61,0x4E58F48F,0xF2DDFDA2,0xF474EF38,0x8789BDC2,

    0x5366F9C3,0xC8B38E74,0xB475F255,0x46FCD9B9,0x7AEB2661,0x8B1DDF84,

    0x846A0E79,0x915F95E2,0x466E598E,0x20B45770,0x8CD55591,0xC902DE4C,

    0xB90BACE1,0xBB8205D0,0x11A86248,0x7574A99E,0xB77F19B6,0xE0A9DC09,

    0x662D09A1,0xC4324633,0xE85A1F02,0x09F0BE8C,0x4A99A025,0x1D6EFE10,

    0x1AB93D1D,0x0BA5A4DF,0xA186F20F,0x2868F169,0xDCB7DA83,0x573906FE,

    0xA1E2CE9B,0x4FCD7F52,0x50115E01,0xA70683FA,0xA002B5C4,0x0DE6D027,

    0x9AF88C27,0x773F8641,0xC3604C06,0x61A806B5,0xF0177A28,0xC0F586E0,

    0x006058AA,0x30DC7D62,0x11E69ED7,0x2338EA63,0x53C2DD94,0xC2C21634,

    0xBBCBEE56,0x90BCB6DE,0xEBFC7DA1,0xCE591D76,0x6F05E409,0x4B7C0188,

    0x39720A3D,0x7C927C24,0x86E3725F,0x724D9DB9,0x1AC15BB4,0xD39EB8FC,

    0xED545578,0x08FCA5B5,0xD83D7CD3,0x4DAD0FC4,0x1E50EF5E,0xB161E6F8,

    0xA28514D9,0x6C51133C,0x6FD5C7E7,0x56E14EC4,0x362ABFCE,0xDDC6C837,

    0xD79A3234,0x92638212,0x670EFA8E,0x406000E0 };

static const u32 ks3[256] = {

    0x3A39CE37,0xD3FAF5CF,0xABC27737,0x5AC52D1B,0x5CB0679E,0x4FA33742,

    0xD3822740,0x99BC9BBE,0xD5118E9D,0xBF0F7315,0xD62D1C7E,0xC700C47B,

    0xB78C1B6B,0x21A19045,0xB26EB1BE,0x6A366EB4,0x5748AB2F,0xBC946E79,

    0xC6A376D2,0x6549C2C8,0x530FF8EE,0x468DDE7D,0xD5730A1D,0x4CD04DC6,

    0x2939BBDB,0xA9BA4650,0xAC9526E8,0xBE5EE304,0xA1FAD5F0,0x6A2D519A,

    0x63EF8CE2,0x9A86EE22,0xC089C2B8,0x43242EF6,0xA51E03AA,0x9CF2D0A4,

    0x83C061BA,0x9BE96A4D,0x8FE51550,0xBA645BD6,0x2826A2F9,0xA73A3AE1,

    0x4BA99586,0xEF5562E9,0xC72FEFD3,0xF752F7DA,0x3F046F69,0x77FA0A59,

    0x80E4A915,0x87B08601,0x9B09E6AD,0x3B3EE593,0xE990FD5A,0x9E34D797,

    0x2CF0B7D9,0x022B8B51,0x96D5AC3A,0x017DA67D,0xD1CF3ED6,0x7C7D2D28,

    0x1F9F25CF,0xADF2B89B,0x5AD6B472,0x5A88F54C,0xE029AC71,0xE019A5E6,

    0x47B0ACFD,0xED93FA9B,0xE8D3C48D,0x283B57CC,0xF8D56629,0x79132E28,

    0x785F0191,0xED756055,0xF7960E44,0xE3D35E8C,0x15056DD4,0x88F46DBA,

    0x03A16125,0x0564F0BD,0xC3EB9E15,0x3C9057A2,0x97271AEC,0xA93A072A,

    0x1B3F6D9B,0x1E6321F5,0xF59C66FB,0x26DCF319,0x7533D928,0xB155FDF5,

    0x03563482,0x8ABA3CBB,0x28517711,0xC20AD9F8,0xABCC5167,0xCCAD925F,

    0x4DE81751,0x3830DC8E,0x379D5862,0x9320F991,0xEA7A90C2,0xFB3E7BCE,

    0x5121CE64,0x774FBE32,0xA8B6E37E,0xC3293D46,0x48DE5369,0x6413E680,

    0xA2AE0810,0xDD6DB224,0x69852DFD,0x09072166,0xB39A460A,0x6445C0DD,

    0x586CDECF,0x1C20C8AE,0x5BBEF7DD,0x1B588D40,0xCCD2017F,0x6BB4E3BB,

    0xDDA26A7E,0x3A59FF45,0x3E350A44,0xBCB4CDD5,0x72EACEA8,0xFA6484BB,

    0x8D6612AE,0xBF3C6F47,0xD29BE463,0x542F5D9E,0xAEC2771B,0xF64E6370,

    0x740E0D8D,0xE75B1357,0xF8721671,0xAF537D5D,0x4040CB08,0x4EB4E2CC,

    0x34D2466A,0x0115AF84,0xE1B00428,0x95983A1D,0x06B89FB4,0xCE6EA048,

    0x6F3F3B82,0x3520AB82,0x011A1D4B,0x277227F8,0x611560B1,0xE7933FDC,

    0xBB3A792B,0x344525BD,0xA08839E1,0x51CE794B,0x2F32C9B7,0xA01FBAC9,

    0xE01CC87E,0xBCC7D1F6,0xCF0111C3,0xA1E8AAC7,0x1A908749,0xD44FBD9A,

    0xD0DADECB,0xD50ADA38,0x0339C32A,0xC6913667,0x8DF9317C,0xE0B12B4F,

    0xF79E59B7,0x43F5BB3A,0xF2D519FF,0x27D9459C,0xBF97222C,0x15E6FC2A,

    0x0F91FC71,0x9B941525,0xFAE59361,0xCEB69CEB,0xC2A86459,0x12BAA8D1,

    0xB6C1075E,0xE3056A0C,0x10D25065,0xCB03A442,0xE0EC6E0E,0x1698DB3B,

    0x4C98A0BE,0x3278E964,0x9F1F9532,0xE0D392DF,0xD3A0342B,0x8971F21E,

    0x1B0A7441,0x4BA3348C,0xC5BE7120,0xC37632D8,0xDF359F8D,0x9B992F2E,

    0xE60B6F47,0x0FE3F11D,0xE54CDA54,0x1EDAD891,0xCE6279CF,0xCD3E7E6F,

    0x1618B166,0xFD2C1D05,0x848FD2C5,0xF6FB2299,0xF523F357,0xA6327623,

    0x93A83531,0x56CCCD02,0xACF08162,0x5A75EBB5,0x6E163697,0x88D273CC,

    0xDE966292,0x81B949D0,0x4C50901B,0x71C65614,0xE6C6C7BD,0x327A140A,

    0x45E1D006,0xC3F27B9A,0xC9AA53FD,0x62A80F00,0xBB25BFE2,0x35BDD2F6,

    0x71126905,0xB2040222,0xB6CBCF7C,0xCD769C2B,0x53113EC0,0x1640E3D3,

    0x38ABBD60,0x2547ADF0,0xBA38209C,0xF746CE76,0x77AFA1C5,0x20756060,

    0x85CBFE4E,0x8AE88DD8,0x7AAAF9B0,0x4CF9AA7E,0x1948C25C,0x02FB8A8C,

    0x01C36AE4,0xD6EBE1F9,0x90D4F869,0xA65CDEA0,0x3F09252D,0xC208E69F,

    0xB74E6132,0xCE77E25B,0x578FDFE3,0x3AC372E6 };

static const u32 ps[16+2] = {

    0x243F6A88,0x85A308D3,0x13198A2E,0x03707344,0xA4093822,0x299F31D0,

    0x082EFA98,0xEC4E6C89,0x452821E6,0x38D01377,0xBE5466CF,0x34E90C6C,

    0xC0AC29B7,0xC97C50DD,0x3F84D5B5,0xB5470917,0x9216D5D9,0x8979FB1B };

#ifdef USE_AMD64_ASM

/* Assembly implementations of Blowfish. */

extern void _gcry_blowfish_amd64_do_encrypt(BLOWFISH_context *c, u32 *ret_xl,

              u32 *ret_xr);

extern void _gcry_blowfish_amd64_encrypt_block(BLOWFISH_context *c, byte *out,

                 const byte *in);

extern void _gcry_blowfish_amd64_decrypt_block(BLOWFISH_context *c, byte *out,

                 const byte *in);

/* These assembly implementations process four blocks in parallel. */

extern void _gcry_blowfish_amd64_ctr_enc(BLOWFISH_context *ctx, byte *out,

           const byte *in, byte *ctr);

extern void _gcry_blowfish_amd64_cbc_dec(BLOWFISH_context *ctx, byte *out,

           const byte *in, byte *iv);

extern void _gcry_blowfish_amd64_cfb_dec(BLOWFISH_context *ctx, byte *out,

           const byte *in, byte *iv);

static void

do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )

{

  _gcry_blowfish_amd64_do_encrypt (bc, ret_xl, ret_xr);

}

static void

do_encrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)

{

  _gcry_blowfish_amd64_encrypt_block (context, outbuf, inbuf);

}

static void

do_decrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)

{

  _gcry_blowfish_amd64_decrypt_block (context, outbuf, inbuf);

}

static inline void

blowfish_amd64_ctr_enc(BLOWFISH_context *ctx, byte *out, const byte *in,

                       byte *ctr)

{

  _gcry_blowfish_amd64_ctr_enc(ctx, out, in, ctr);

}

static inline void

blowfish_amd64_cbc_dec(BLOWFISH_context *ctx, byte *out, const byte *in,

                       byte *iv)

{

  _gcry_blowfish_amd64_cbc_dec(ctx, out, in, iv);

}

static inline void

blowfish_amd64_cfb_dec(BLOWFISH_context *ctx, byte *out, const byte *in,

                       byte *iv)

{

  _gcry_blowfish_amd64_cfb_dec(ctx, out, in, iv);

}

static unsigned int

encrypt_block (void *context , byte *outbuf, const byte *inbuf)

{

  BLOWFISH_context *c = (BLOWFISH_context *) context;

  do_encrypt_block (c, outbuf, inbuf);

  return /*burn_stack*/ (2*8);

}

static unsigned int

decrypt_block (void *context, byte *outbuf, const byte *inbuf)

{

  BLOWFISH_context *c = (BLOWFISH_context *) context;

  do_decrypt_block (c, outbuf, inbuf);

  return /*burn_stack*/ (2*8);

}

#elif defined(USE_ARM_ASM)

/* Assembly implementations of Blowfish. */

extern void _gcry_blowfish_arm_do_encrypt(BLOWFISH_context *c, u32 *ret_xl,

              u32 *ret_xr);

extern void _gcry_blowfish_arm_encrypt_block(BLOWFISH_context *c, byte *out,

                 const byte *in);

extern void _gcry_blowfish_arm_decrypt_block(BLOWFISH_context *c, byte *out,

                 const byte *in);

/* These assembly implementations process two blocks in parallel. */

extern void _gcry_blowfish_arm_ctr_enc(BLOWFISH_context *ctx, byte *out,

           const byte *in, byte *ctr);

extern void _gcry_blowfish_arm_cbc_dec(BLOWFISH_context *ctx, byte *out,

           const byte *in, byte *iv);

extern void _gcry_blowfish_arm_cfb_dec(BLOWFISH_context *ctx, byte *out,

           const byte *in, byte *iv);

static void

do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )

{

  _gcry_blowfish_arm_do_encrypt (bc, ret_xl, ret_xr);

}

static void

do_encrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)

{

  _gcry_blowfish_arm_encrypt_block (context, outbuf, inbuf);

}

static void

do_decrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf)

{

  _gcry_blowfish_arm_decrypt_block (context, outbuf, inbuf);

}

static unsigned int

encrypt_block (void *context , byte *outbuf, const byte *inbuf)

{

  BLOWFISH_context *c = (BLOWFISH_context *) context;

  do_encrypt_block (c, outbuf, inbuf);

  return /*burn_stack*/ (10*4);

}

static unsigned int

decrypt_block (void *context, byte *outbuf, const byte *inbuf)

{

  BLOWFISH_context *c = (BLOWFISH_context *) context;

  do_decrypt_block (c, outbuf, inbuf);

  return /*burn_stack*/ (10*4);

}

#else /*USE_ARM_ASM*/

#define F(x) ((( s0[(x)>>24] + s1[((x)>>16)&0xff])   \

       ^ s2[((x)>>8)&0xff]) + s3[(x)&0xff] )

#define R(l,r,i) do { l ^= p[i]; r ^= F(l); } while(0)

#define R3(l,r,i) do { R(l##0,r##0,i);R(l##1,r##1,i);R(l##2,r##2,i);} while(0)

static void

do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )

{

  u32 xl, xr, *s0, *s1, *s2, *s3, *p;

  xl = *ret_xl;

  xr = *ret_xr;

  p = bc->p;

  s0 = bc->s0;

  s1 = bc->s1;

  s2 = bc->s2;

  s3 = bc->s3;

  R( xl, xr,  0);

  R( xr, xl,  1);

  R( xl, xr,  2);

  R( xr, xl,  3);

  R( xl, xr,  4);

  R( xr, xl,  5);

  R( xl, xr,  6);

  R( xr, xl,  7);

  R( xl, xr,  8);

  R( xr, xl,  9);

  R( xl, xr, 10);

  R( xr, xl, 11);

  R( xl, xr, 12);

  R( xr, xl, 13);

  R( xl, xr, 14);

  R( xr, xl, 15);

  xl ^= p[16];

  xr ^= p[16+1];

  *ret_xl = xr;

  *ret_xr = xl;

}

static void

do_encrypt_3 ( BLOWFISH_context *bc, byte *dst, const byte *src )

{

  u32 xl0, xr0, xl1, xr1, xl2, xr2, *s0, *s1, *s2, *s3, *p;

  xl0 = buf_get_be32(src + 0);

  xr0 = buf_get_be32(src + 4);

  xl1 = buf_get_be32(src + 8);

  xr1 = buf_get_be32(src + 12);

  xl2 = buf_get_be32(src + 16);

  xr2 = buf_get_be32(src + 20);

  p = bc->p;

  s0 = bc->s0;

  s1 = bc->s1;

  s2 = bc->s2;

  s3 = bc->s3;

  R3( xl, xr,  0);

  R3( xr, xl,  1);

  R3( xl, xr,  2);

  R3( xr, xl,  3);

  R3( xl, xr,  4);

  R3( xr, xl,  5);

  R3( xl, xr,  6);

  R3( xr, xl,  7);

  R3( xl, xr,  8);

  R3( xr, xl,  9);

  R3( xl, xr, 10);

  R3( xr, xl, 11);

  R3( xl, xr, 12);

  R3( xr, xl, 13);

  R3( xl, xr, 14);

  R3( xr, xl, 15);

  xl0 ^= p[16];

  xr0 ^= p[16+1];

  xl1 ^= p[16];

  xr1 ^= p[16+1];

  xl2 ^= p[16];

  xr2 ^= p[16+1];

  buf_put_be32(dst + 0, xr0);

  buf_put_be32(dst + 4, xl0);

  buf_put_be32(dst + 8, xr1);

  buf_put_be32(dst + 12, xl1);

  buf_put_be32(dst + 16, xr2);

  buf_put_be32(dst + 20, xl2);

}

static void

decrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )

{

  u32 xl, xr, *s0, *s1, *s2, *s3, *p;

  xl = *ret_xl;

  xr = *ret_xr;

  p = bc->p;

  s0 = bc->s0;

  s1 = bc->s1;

  s2 = bc->s2;

  s3 = bc->s3;

  R( xl, xr, 17);

  R( xr, xl, 16);

  R( xl, xr, 15);

  R( xr, xl, 14);

  R( xl, xr, 13);

  R( xr, xl, 12);

  R( xl, xr, 11);

  R( xr, xl, 10);

  R( xl, xr,  9);

  R( xr, xl,  8);

  R( xl, xr,  7);

  R( xr, xl,  6);

  R( xl, xr,  5);

  R( xr, xl,  4);

  R( xl, xr,  3);

  R( xr, xl,  2);

  xl ^= p[1];

  xr ^= p[0];

  *ret_xl = xr;

  *ret_xr = xl;

}

static void

do_decrypt_3 ( BLOWFISH_context *bc, byte *dst, const byte *src )

{

  u32 xl0, xr0, xl1, xr1, xl2, xr2, *s0, *s1, *s2, *s3, *p;

  xl0 = buf_get_be32(src + 0);

  xr0 = buf_get_be32(src + 4);

  xl1 = buf_get_be32(src + 8);

  xr1 = buf_get_be32(src + 12);

  xl2 = buf_get_be32(src + 16);

  xr2 = buf_get_be32(src + 20);

  p = bc->p;

  s0 = bc->s0;

  s1 = bc->s1;

  s2 = bc->s2;

  s3 = bc->s3;

  R3( xl, xr, 17);

  R3( xr, xl, 16);

  R3( xl, xr, 15);

  R3( xr, xl, 14);

  R3( xl, xr, 13);

  R3( xr, xl, 12);

  R3( xl, xr, 11);

  R3( xr, xl, 10);

  R3( xl, xr,  9);

  R3( xr, xl,  8);

  R3( xl, xr,  7);

  R3( xr, xl,  6);

  R3( xl, xr,  5);

  R3( xr, xl,  4);

  R3( xl, xr,  3);

  R3( xr, xl,  2);

  xl0 ^= p[1];

  xr0 ^= p[0];

  xl1 ^= p[1];

  xr1 ^= p[0];

  xl2 ^= p[1];

  xr2 ^= p[0];

  buf_put_be32(dst + 0, xr0);

  buf_put_be32(dst + 4, xl0);

  buf_put_be32(dst + 8, xr1);

  buf_put_be32(dst + 12, xl1);

  buf_put_be32(dst + 16, xr2);

  buf_put_be32(dst + 20, xl2);

}

#undef F

#undef R

#undef R3

static void

do_encrypt_block ( BLOWFISH_context *bc, byte *outbuf, const byte *inbuf )

{

  u32 d1, d2;

  d1 = buf_get_be32(inbuf);

  d2 = buf_get_be32(inbuf + 4);

  do_encrypt( bc, &d1, &d2 );

  buf_put_be32(outbuf, d1);

  buf_put_be32(outbuf + 4, d2);

}

static unsigned int

encrypt_block (void *context, byte *outbuf, const byte *inbuf)

{

  BLOWFISH_context *bc = (BLOWFISH_context *) context;

  do_encrypt_block (bc, outbuf, inbuf);

  return /*burn_stack*/ (64);

}

static void

do_decrypt_block (BLOWFISH_context *bc, byte *outbuf, const byte *inbuf)

{

  u32 d1, d2;

  d1 = buf_get_be32(inbuf);

  d2 = buf_get_be32(inbuf + 4);

  decrypt( bc, &d1, &d2 );

  buf_put_be32(outbuf, d1);

  buf_put_be32(outbuf + 4, d2);

}

static unsigned int

decrypt_block (void *context, byte *outbuf, const byte *inbuf)

{

  BLOWFISH_context *bc = (BLOWFISH_context *) context;

  do_decrypt_block (bc, outbuf, inbuf);

  return /*burn_stack*/ (64);

}

#endif /*!USE_AMD64_ASM&&!USE_ARM_ASM*/

/* Bulk encryption of complete blocks in CTR mode.  This function is only

   intended for the bulk encryption feature of cipher.c.  CTR is expected to be

   of size BLOWFISH_BLOCKSIZE. */

static void

_gcry_blowfish_ctr_enc(void *context, unsigned char *ctr, void *outbuf_arg,

           const void *inbuf_arg, size_t nblocks)

{

  BLOWFISH_context *ctx = context;

  unsigned char *outbuf = outbuf_arg;

  const unsigned char *inbuf = inbuf_arg;

  unsigned char tmpbuf[BLOWFISH_BLOCKSIZE * 3];

  int burn_stack_depth = (64) + 4 * BLOWFISH_BLOCKSIZE;

#ifdef USE_AMD64_ASM

  {

    if (nblocks >= 4)

      burn_stack_depth += 5 * sizeof(void*);

    /* Process data in 4 block chunks. */

    while (nblocks >= 4)

      {

        blowfish_amd64_ctr_enc(ctx, outbuf, inbuf, ctr);

        nblocks -= 4;

        outbuf += 4 * BLOWFISH_BLOCKSIZE;

        inbuf  += 4 * BLOWFISH_BLOCKSIZE;

      }

    /* Use generic code to handle smaller chunks... */

  }

#elif defined(USE_ARM_ASM)

  {

    /* Process data in 2 block chunks. */

    while (nblocks >= 2)

      {

        _gcry_blowfish_arm_ctr_enc(ctx, outbuf, inbuf, ctr);

        nblocks -= 2;

        outbuf += 2 * BLOWFISH_BLOCKSIZE;

        inbuf  += 2 * BLOWFISH_BLOCKSIZE;

      }

    /* Use generic code to handle smaller chunks... */

  }

#endif

#if !defined(USE_AMD64_ASM) && !defined(USE_ARM_ASM)

  for ( ;nblocks >= 3; nblocks -= 3)

    {

      /* Prepare the counter blocks. */

      cipher_block_cpy (tmpbuf + 0, ctr, BLOWFISH_BLOCKSIZE);

      cipher_block_cpy (tmpbuf + 8, ctr, BLOWFISH_BLOCKSIZE);

      cipher_block_cpy (tmpbuf + 16, ctr, BLOWFISH_BLOCKSIZE);

      cipher_block_add (tmpbuf + 8, 1, BLOWFISH_BLOCKSIZE);

      cipher_block_add (tmpbuf + 16, 2, BLOWFISH_BLOCKSIZE);

      cipher_block_add (ctr, 3, BLOWFISH_BLOCKSIZE);

      /* Encrypt the counter. */

      do_encrypt_3(ctx, tmpbuf, tmpbuf);

      /* XOR the input with the encrypted counter and store in output.  */

      buf_xor(outbuf, tmpbuf, inbuf, BLOWFISH_BLOCKSIZE * 3);

      outbuf += BLOWFISH_BLOCKSIZE * 3;

      inbuf  += BLOWFISH_BLOCKSIZE * 3;

    }

#endif

  for ( ;nblocks; nblocks-- )

    {

      /* Encrypt the counter. */

      do_encrypt_block(ctx, tmpbuf, ctr);

      /* XOR the input with the encrypted counter and store in output.  */

      cipher_block_xor(outbuf, tmpbuf, inbuf, BLOWFISH_BLOCKSIZE);

      outbuf += BLOWFISH_BLOCKSIZE;

      inbuf  += BLOWFISH_BLOCKSIZE;

      /* Increment the counter.  */

      cipher_block_add (ctr, 1, BLOWFISH_BLOCKSIZE);

    }

  wipememory(tmpbuf, sizeof(tmpbuf));

  _gcry_burn_stack(burn_stack_depth);

}

/* Bulk decryption of complete blocks in CBC mode.  This function is only

   intended for the bulk encryption feature of cipher.c. */

static void

_gcry_blowfish_cbc_dec(void *context, unsigned char *iv, void *outbuf_arg,

           const void *inbuf_arg, size_t nblocks)

{

  BLOWFISH_context *ctx = context;

  unsigned char *outbuf = outbuf_arg;

  const unsigned char *inbuf = inbuf_arg;

  unsigned char savebuf[BLOWFISH_BLOCKSIZE * 3];

  int burn_stack_depth = (64) + 4 * BLOWFISH_BLOCKSIZE;

#ifdef USE_AMD64_ASM

  {

    if (nblocks >= 4)

      burn_stack_depth += 5 * sizeof(void*);

    /* Process data in 4 block chunks. */

    while (nblocks >= 4)

      {

        blowfish_amd64_cbc_dec(ctx, outbuf, inbuf, iv);

        nblocks -= 4;

        outbuf += 4 * BLOWFISH_BLOCKSIZE;

        inbuf  += 4 * BLOWFISH_BLOCKSIZE;

      }

    /* Use generic code to handle smaller chunks... */

  }

#elif defined(USE_ARM_ASM)

  {

    /* Process data in 2 block chunks. */

    while (nblocks >= 2)

      {

        _gcry_blowfish_arm_cbc_dec(ctx, outbuf, inbuf, iv);

        nblocks -= 2;

        outbuf += 2 * BLOWFISH_BLOCKSIZE;

        inbuf  += 2 * BLOWFISH_BLOCKSIZE;

      }

    /* Use generic code to handle smaller chunks... */

  }

#endif

#if !defined(USE_AMD64_ASM) && !defined(USE_ARM_ASM)

  for ( ;nblocks >= 3; nblocks -= 3)

    {

      /* INBUF is needed later and it may be identical to OUTBUF, so store

         the intermediate result to SAVEBUF.  */

      do_decrypt_3 (ctx, savebuf, inbuf);

      cipher_block_xor_1 (savebuf + 0, iv, BLOWFISH_BLOCKSIZE);

      cipher_block_xor_1 (savebuf + 8, inbuf, BLOWFISH_BLOCKSIZE * 2);

      cipher_block_cpy (iv, inbuf + 16, BLOWFISH_BLOCKSIZE);

      buf_cpy (outbuf, savebuf, BLOWFISH_BLOCKSIZE * 3);

      inbuf += BLOWFISH_BLOCKSIZE * 3;

      outbuf += BLOWFISH_BLOCKSIZE * 3;

    }

#endif

  for ( ;nblocks; nblocks-- )

    {

      /* INBUF is needed later and it may be identical to OUTBUF, so store

         the intermediate result to SAVEBUF.  */

      do_decrypt_block (ctx, savebuf, inbuf);

      cipher_block_xor_n_copy_2(outbuf, savebuf, iv, inbuf, BLOWFISH_BLOCKSIZE);

      inbuf += BLOWFISH_BLOCKSIZE;

      outbuf += BLOWFISH_BLOCKSIZE;

    }

  wipememory(savebuf, sizeof(savebuf));

  _gcry_burn_stack(burn_stack_depth);

}

/* Bulk decryption of complete blocks in CFB mode.  This function is only

   intended for the bulk encryption feature of cipher.c. */

static void

_gcry_blowfish_cfb_dec(void *context, unsigned char *iv, void *outbuf_arg,

           const void *inbuf_arg, size_t nblocks)

{

  BLOWFISH_context *ctx = context;

  unsigned char *outbuf = outbuf_arg;

  const unsigned char *inbuf = inbuf_arg;

  unsigned char tmpbuf[BLOWFISH_BLOCKSIZE * 3];

  int burn_stack_depth = (64) + 4 * BLOWFISH_BLOCKSIZE;

#ifdef USE_AMD64_ASM

  {

    if (nblocks >= 4)

      burn_stack_depth += 5 * sizeof(void*);

    /* Process data in 4 block chunks. */

    while (nblocks >= 4)

      {

        blowfish_amd64_cfb_dec(ctx, outbuf, inbuf, iv);

        nblocks -= 4;

        outbuf += 4 * BLOWFISH_BLOCKSIZE;

        inbuf  += 4 * BLOWFISH_BLOCKSIZE;

      }

    /* Use generic code to handle smaller chunks... */

  }

#elif defined(USE_ARM_ASM)

  {

    /* Process data in 2 block chunks. */

    while (nblocks >= 2)

      {

        _gcry_blowfish_arm_cfb_dec(ctx, outbuf, inbuf, iv);

        nblocks -= 2;

        outbuf += 2 * BLOWFISH_BLOCKSIZE;

        inbuf  += 2 * BLOWFISH_BLOCKSIZE;

      }

    /* Use generic code to handle smaller chunks... */

  }

#endif

#if !defined(USE_AMD64_ASM) && !defined(USE_ARM_ASM)

  for ( ;nblocks >= 3; nblocks -= 3 )

    {

      cipher_block_cpy (tmpbuf + 0, iv, BLOWFISH_BLOCKSIZE);

      cipher_block_cpy (tmpbuf + 8, inbuf + 0, BLOWFISH_BLOCKSIZE * 2);

      cipher_block_cpy (iv, inbuf + 16, BLOWFISH_BLOCKSIZE);

      do_encrypt_3 (ctx, tmpbuf, tmpbuf);

      buf_xor (outbuf, inbuf, tmpbuf, BLOWFISH_BLOCKSIZE * 3);

      outbuf += BLOWFISH_BLOCKSIZE * 3;

      inbuf  += BLOWFISH_BLOCKSIZE * 3;

    }

#endif

  for ( ;nblocks; nblocks-- )

    {

      do_encrypt_block(ctx, iv, iv);

      cipher_block_xor_n_copy(outbuf, iv, inbuf, BLOWFISH_BLOCKSIZE);

      outbuf += BLOWFISH_BLOCKSIZE;

      inbuf  += BLOWFISH_BLOCKSIZE;

    }

  wipememory(tmpbuf, sizeof(tmpbuf));

  _gcry_burn_stack(burn_stack_depth);

}

static const char*

selftest(void)

{

  BLOWFISH_context c;

  cipher_bulk_ops_t bulk_ops;

  byte plain[] = "BLOWFISH";

  byte buffer[8];

  static const byte plain3[] =

    { 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10 };

  static const byte key3[] =

    { 0x41, 0x79, 0x6E, 0xA0, 0x52, 0x61, 0x6E, 0xE4 };

  static const byte cipher3[] =

    { 0xE1, 0x13, 0xF4, 0x10, 0x2C, 0xFC, 0xCE, 0x43 };

  bf_setkey( (void *) &c,

             (const unsigned char*)"abcdefghijklmnopqrstuvwxyz", 26,

             &bulk_ops );

  encrypt_block( (void *) &c, buffer, plain );

  if( memcmp( buffer, "\x32\x4E\xD0\xFE\xF4\x13\xA2\x03", 8 ) )

    return "Blowfish selftest failed (1).";

  decrypt_block( (void *) &c, buffer, buffer );

  if( memcmp( buffer, plain, 8 ) )

    return "Blowfish selftest failed (2).";

  bf_setkey( (void *) &c, key3, 8, &bulk_ops );

  encrypt_block( (void *) &c, buffer, plain3 );

  if( memcmp( buffer, cipher3, 8 ) )

    return "Blowfish selftest failed (3).";

  decrypt_block( (void *) &c, buffer, buffer );

  if( memcmp( buffer, plain3, 8 ) )

    return "Blowfish selftest failed (4).";

  return NULL;

}

struct hashset_elem {

  u32 val;

  short nidx;

  char used;

};

static inline byte

val_to_hidx(u32 val)

{

  /* bf sboxes are quite random already. */

  return (val >> 24) ^ (val >> 16)  ^ (val >> 8) ^ val;

}

static inline int

add_val(struct hashset_elem hset[256], u32 val, int *midx,

  struct hashset_elem *mpool)

{

  struct hashset_elem *elem;

  byte hidx;

  hidx = val_to_hidx(val);

  elem = &hset[hidx];

  /* Check if first is in use. */

  if (elem->used == 0)

    {

      elem->val = val;

      elem->nidx = -1;

      elem->used = 1;

      return 0;

    }

  /* Check if first matches. */

  if (elem->val == val)

    return 1;

  for (; elem->nidx >= 0; elem = &mpool[elem->nidx])

    {

      /* Check if elem matches. */

      if (elem->val == val)

        return 1;

    }

  elem->nidx = (*midx)++;

  elem = &mpool[elem->nidx];

  elem->val = val;

  elem->nidx = -1;

  elem->used = 1;

  return 0;

}

static gcry_err_code_t

do_bf_setkey (BLOWFISH_context *c, const byte *key, unsigned keylen)

{

  struct hashset_elem mempool[4 * 255]; /* Enough entries for the worst case. */

  struct hashset_elem hset[4][256];

  int memidx = 0;

  int weak = 0;

  int i, j, ret;

  u32 data, datal, datar;

  static int initialized;

  static const char *selftest_failed;

  if( !initialized )

    {

      initialized = 1;

      selftest_failed = selftest();

      if( selftest_failed )

        log_error ("%s\n", selftest_failed );

    }

  if( selftest_failed )

    return GPG_ERR_SELFTEST_FAILED;

  if (keylen < BLOWFISH_KEY_MIN_BITS / 8 ||

      keylen > BLOWFISH_KEY_MAX_BITS / 8)

    return GPG_ERR_INV_KEYLEN;

  memset(hset, 0, sizeof(hset));

  for(i=0; i < 16+2; i++ )

    c->p[i] = ps[i];

  for(i=0; i < 256; i++ )

    {

      c->s0[i] = ks0[i];

      c->s1[i] = ks1[i];

      c->s2[i] = ks2[i];

      c->s3[i] = ks3[i];

    }

  for(i=j=0; i < 16+2; i++ )

    {

      data = ((u32)key[j] << 24) |

             ((u32)key[(j+1)%keylen] << 16) |

             ((u32)key[(j+2)%keylen] << 8) |

             ((u32)key[(j+3)%keylen]);

      c->p[i] ^= data;

      j = (j+4) % keylen;

    }

  datal = datar = 0;

  for(i=0; i < 16+2; i += 2 )

    {

      do_encrypt( c, &datal, &datar );

      c->p[i]   = datal;

      c->p[i+1] = datar;

    }

  for(i=0; i < 256; i += 2 )

    {

      do_encrypt( c, &datal, &datar );

      c->s0[i]   = datal;

      c->s0[i+1] = datar;

      /* Add values to hashset, detect duplicates (weak keys). */

      ret = add_val (hset[0], datal, &memidx, mempool);

      weak = ret ? 1 : weak;

      ret = add_val (hset[0], datar, &memidx, mempool);

      weak = ret ? 1 : weak;

    }

  for(i=0; i < 256; i += 2 )

    {

      do_encrypt( c, &datal, &datar );

      c->s1[i]   = datal;

      c->s1[i+1] = datar;

      /* Add values to hashset, detect duplicates (weak keys). */

      ret = add_val (hset[1], datal, &memidx, mempool);

      weak = ret ? 1 : weak;

      ret = add_val (hset[1], datar, &memidx, mempool);

      weak = ret ? 1 : weak;

    }

  for(i=0; i < 256; i += 2 )

    {

      do_encrypt( c, &datal, &datar );

      c->s2[i]   = datal;

      c->s2[i+1] = datar;

      /* Add values to hashset, detect duplicates (weak keys). */

      ret = add_val (hset[2], datal, &memidx, mempool);

      weak = ret ? 1 : weak;