/*

  blowfish.c

  Author Mika Kojo <mkojo@ssh.fi>
  Copyright (c) 1996 SSH Communications Security Oy, Espoo, Finland

  This code is based on Bruce Schneier's original implementation.

  TODO:

    Move the Windows assembler out from this file.
  
  */

#include "sshincludes.h"

#ifndef WITHOUT_BLOWFISH

#include "sshgetput.h"
#include "blowfish.h"

#define MAX_KEY_BYTES 56
#define KEYBYTES      8

typedef struct
{
  /* The key schedule */
  SshUInt32 S[4* 256], P[16 + 2];

  /* Encrypt/decrypt */
  Boolean for_encryption;
  /* Initialization vector */
} SshBlowfishContext;

/* Blowfish's P and S -boxes, respectively. These were taken
   from Bruce Schneier's public-domain implementation.
   These are the first 4168 bytes of pi's decimals. */

static SshUInt32 ssh_blowfish_pbox[16 + 2] =
{
  0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
  0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
  0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
  0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
  0x9216d5d9, 0x8979fb1b,
};

static SshUInt32 ssh_blowfish_sbox[256 * 4] =
{
  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,
  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,
  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,
  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,
};

/*
 ROUND(a, b, c) 

 is equal to 
 
 t = S[(b >> 24) & 0xff];
 t += S[256 + (b >> 16) & 0xff];
 t ^= S[512 + (b >> 8) & 0xff];
 t += S[768 + b & 0xff];
 t ^= P[c];
 a ^= t;

 also equal to

 (a ^= (((S[0 + (b >> 24) & 0xff] + S[256 + (b >> 16) & 0xff]) ^
       S[512 + (b >> 8) & 0xff]) + S[768 + b & 0xff]) ^ P[c])
*/

#if !defined(WINDOWS)
#if !defined(ASM_BLOWFISH)

#define SSH_GET32_3(x) (((x) & 0x00ff))
#define SSH_GET32_2(x) (((x) >> (8)) & (0x00ff))
#define SSH_GET32_1(x) (((x) >> (16)) & (0x00ff))
#define SSH_GET32_0(x) (((x) >> (24)) & (0x00ff))

#define SSH_BF_F(x) (((S[0 * 256 + SSH_GET32_0(x)] + \
                       S[1 * 256 + SSH_GET32_1(x)]) ^ \
                  S[2 * 256 + SSH_GET32_2(x)]) + S[3 * 256 + SSH_GET32_3(x)])

#define ROUND(a, b, n) (a ^= (SSH_BF_F(b) ^ P[n]))
     
/*  The internal encipher, processes 64-bit blocks (as standard). */
     
void ssh_blowfish_encrypt(SshBlowfishContext *context,
                          SshUInt32 xl, SshUInt32 xr, SshUInt32 *output)
{
  register SshUInt32 yl;
  register SshUInt32 yr;
  SshUInt32 *S = context -> S;
  SshUInt32 *P = context -> P;

  yl = xl;
  yr = xr;
  
  yl ^= P[0];
  ROUND(yr, yl, 1);  ROUND(yl, yr, 2);
  ROUND(yr, yl, 3);  ROUND(yl, yr, 4);
  ROUND(yr, yl, 5);  ROUND(yl, yr, 6);
  ROUND(yr, yl, 7);  ROUND(yl, yr, 8);
  ROUND(yr, yl, 9);  ROUND(yl, yr, 10);
  ROUND(yr, yl, 11); ROUND(yl, yr, 12);
  ROUND(yr, yl, 13); ROUND(yl, yr, 14);
  ROUND(yr, yl, 15); ROUND(yl, yr, 16);
  yr ^= P[17];
  
  output[0] = yr;
  output[1] = yl;
}

/* 
  Internal decipher, two 32 bit blocks at once. */

void ssh_blowfish_decrypt(SshBlowfishContext *context,
                          SshUInt32 xl, SshUInt32 xr, SshUInt32 *output)
{
  register SshUInt32 yl;
  register SshUInt32 yr;
  SshUInt32 *S = context -> S;
  SshUInt32 *P = context -> P;

  yl = xl;
  yr = xr;

  yl ^= P[17];
  ROUND (yr, yl, 16); ROUND (yl, yr, 15);
  ROUND (yr, yl, 14); ROUND (yl, yr, 13);
  ROUND (yr, yl, 12); ROUND (yl, yr, 11);
  ROUND (yr, yl, 10); ROUND (yl, yr, 9);
  ROUND (yr, yl, 8);  ROUND (yl, yr, 7);
  ROUND (yr, yl, 6);  ROUND (yl, yr, 5);
  ROUND (yr, yl, 4);  ROUND (yl, yr, 3);
  ROUND (yr, yl, 2);  ROUND (yl, yr, 1);
  yr ^= P[0];

  output[0] = yr;
  output[1] = yl;
  
}

/* Undefine the ROUND macro, to clear the namespace */
#undef ROUND

#else /* ASM_BLOWFISH */

/* Prototypes for assembler versions. */

void ssh_blowfish_encrypt(SshBlowfishContext *context,
                          SshUInt32 xl, SshUInt32 xr, SshUInt32 *output);

void ssh_blowfish_decrypt(SshBlowfishContext *context,
                          SshUInt32 xl, SshUInt32 xr, SshUInt32 *output);

#endif /* ASM_BLOWFISH */

#else /* WINDOWS */
#if !defined(WIN32)

/* The 32-bit code for 16-bit Windows, tradeoff between speed and simplicity.

   It remains unknown whether truly 16-bit code would be faster than this
   kludged 32-bit code. Also there exists a rather remote possibility that one
   could switch to protected-mode for time inside the function then switch
   back to real-mode, but it seems a little bit far-fetched.

   I assume that there must be a better way for doing this.
   */

/* The prefix for 32-bit operands in real-mode. Used when possible. */
#define PRE32 _emit 0x66
#define ASM32 __asm _emit 0x66
#define ADDRESS32 _emit 0x67

/* Macros for:  add/xor/mov edx, [esi + ecx*4 + n] ...

   ; prefixes 
   67h = Address size prefix
   66h = Operand size prefix

   ; opcodes 
   03h = Add opcode 
   8Bh = Mov opcode
   33h = Xor opcode
  
   ; ModR/M byte 
   94h = edx, disp32[-][-]

   ; SIB byte 
   8Eh = [esi + ecx*4]

   ; displacement in 4 bytes
   00h 00h/01h/02h/03h 00h 00h = 0, 256, 512, 768

   (BTW: I know that I have crossed the line with these things but then again
   what wouldn't we do to get 32-bit code to 16-bit Windows :)
   
   Because these execute in 32-bit memory models in 1-2 clocks, and here we
   need 2 prefixes it comes down to about 2-4 clocks :(
*/

/* MSVC 1.52 is pretty picky about how we define these macros. One way that
   works is this.

   It is due to bug in MSVC 1.52 that __emit doesn't work thus we must use
   _emit. I don't know why these don't work inside __asm{ } but they don't
   seem to so I have to use __asm _emit xx form. */

/* xor edx, [esi + ecx*4 + n] */
#define XOR(n) \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x33 \
__asm _emit 0x94 \
__asm _emit 0x8E \
__asm _emit 0x00 \
__asm _emit (n)  \
__asm _emit 0x00 \
__asm _emit 0x00

/* add edx, [esi + ecx*4 + n] */
#define ADD(n) \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x03 \
__asm _emit 0x94 \
__asm _emit 0x8E \
__asm _emit 0x00 \
__asm _emit (n)  \
__asm _emit 0x00 \
__asm _emit 0x00

/* mov edx, [esi + ecx*4 + n] */
#define MOV(n) \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x8B \
__asm _emit 0x94 \
__asm _emit 0x8E \
__asm _emit 0x00 \
__asm _emit (n)  \
__asm _emit 0x00 \
__asm _emit 0x00

/* add edi, 1024*4 */
#define ADDIM \
__asm _emit 0x66 \
__asm _emit 0x81 \
__asm _emit 0xc7 \
__asm _emit 0x00 \
__asm _emit 0x10 \
__asm _emit 0x00 \
__asm _emit 0x00 

/* xor edx, [edi + n] */
#define XORRM_1(n) \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x33 \
__asm _emit 0x57 \
__asm _emit (n) 

/* xor ebx, [edi] */
#define XORRM_2 \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x33 \
__asm _emit 0x1f

/* xor eax, [edi] */
#define XORRM_3 \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x33 \
__asm _emit 0x07

/* xor ebx, [edi + n] */
#define XORRM_4(n) \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x33 \
__asm _emit 0x5f \
__asm _emit (n)

/* xor eax, [edi + n] */
#define XORRM_5(n) \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x33 \
__asm _emit 0x47 \
__asm _emit (n)
     
/* mov [esi + n], eax */
#define MOVRM_1(n) \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x89 \
__asm _emit 0x46 \
__asm _emit (n)

/* mov [esi], ebx */
#define MOVRM_2 \
__asm _emit 0x67 \
__asm _emit 0x66 \
__asm _emit 0x89 \
__asm _emit 0x1e
     
/* Prefixed version, suffers about 1-2 cycle(s) per prefix(es) and thus might
   be only about 50 % of the speed of the true 32-bit code. */

void ssh_blowfish_encrypt(SshBlowfishContext *context,
                          SshUInt32 xl, SshUInt32 xr,
                          SshUInt32 *output)
{
  /* Do the first part (see the 32bit code for clearer implementation) */
  __asm
    {
      /* Stack datasegment, caller might need it :) */
      push ds;

      /* We don't need the upper part. */
      PRE32;
      xor si, si;

      lds si, dword ptr context;

      PRE32;
      mov di, si;
      /* This place might not be correct:

         PRE32;
         add di, word ptr 1024*4;

         so using even more kludged version. */
      ADDIM;
      
      PRE32;
      mov ax, word ptr xl;
      PRE32;
      mov bx, word ptr xr;

      /*
        xor ax, [di];
        */
      XORRM_3;
      PRE32;
      xor cx, cx;
    }

  /* MSVC 1.52 don't like definition which has __asm{ } form. I don't know
     why. */
  
#define ROUND(n)                    \
    ASM32                           \
    __asm rol ax, 16                \
    __asm mov cl, ah                \
    MOV(0)                          \
                                    \
    __asm mov cl, al                \
    ADD(4)                          \
                                    \
    ASM32                           \
    __asm rol ax, 16                \
    __asm mov cl, ah                \
    XOR(8)                          \
                                    \
    __asm mov cl, al                \
    ADD(12)                         \
                                    \
    XORRM_1(n*4)                    \
                                    \
    ASM32                           \
    __asm xor bx, dx                \
    /* SWAP */                      \
    ASM32                           \
    __asm rol bx, 16                \
    __asm mov cl, bh                \
    MOV(0)                          \
                                    \
    __asm mov cl, bl                \
    ADD(4)                          \
                                    \
    ASM32                           \
    __asm rol bx, 16                \
    __asm mov cl, bh                \
    XOR(8)                          \
                                    \
    __asm mov cl, bl                \
    ADD(12)                         \
                                    \
    XORRM_1((n+1)*4)                \
                                    \
    ASM32                           \
    __asm xor ax, dx 
      
    /* ROUNDS */
    ROUND(1);
    ROUND(3);
    ROUND(5);
    ROUND(7);
    ROUND(9);
    ROUND(11);
    ROUND(13);
    ROUND(15);
#undef ROUND
    
  __asm
    {
      /* xr ^= P[17] */

      XORRM_4(17*4);
      /* xor bx, [di + 17*4]; */

      /* This could be done probably faster with 16-bit instructions, but
         because I'm at it I'll do it as above. */
      PRE32;
      xor si, si;

      lds si, dword ptr output

      MOVRM_2;
      /* mov [si], bx; */
      MOVRM_1(4);
      /* mov [si + 4], ax; */

      /* Don't forget to keep the stack balanced. */
      pop ds;
    }
}

void ssh_blowfish_decrypt(SshBlowfishContext *context, SshUInt32 xl,
                          SshUInt32 xr,
                          SshUInt32 *output)
{
  __asm
    {
      /* Stack datasegment. */
      push ds;

      /* Clear esi register. */
      PRE32;
      xor si, si;

      /* Get the context -> ds:si */
      lds si, dword ptr context;

      PRE32;
      mov di, si;
      /* PRE32;
         add di, 1024*4; */
      ADDIM;
      
      PRE32;
      mov ax, word ptr xl;
      PRE32;
      mov bx, word ptr xr;
      
      /* xor ax, [di + 17*4]; */
      XORRM_5(17*4);
      PRE32;
      xor cx, cx;
    }

  /* MSVC 1.52 don't like definition which has __asm{ } form. I don't know
     why. */
  
#define ROUND(n)                    \
    ASM32                           \
    __asm rol ax, 16                \
    __asm mov cl, ah                \
    MOV(0)                          \
                                    \
    __asm mov cl, al                \
    ADD(4)                          \
                                    \
    ASM32                           \
    __asm rol ax, 16                \
    __asm mov cl, ah                \
    XOR(8)                          \
                                    \
    __asm mov cl, al                \
    ADD(12)                         \
                                    \
    XORRM_1(n*4)                    \
                                    \
    ASM32                           \
    __asm xor bx, dx                \
    /* SWAP */                      \
    ASM32                           \
    __asm rol bx, 16                \
    __asm mov cl, bh                \
    MOV(0)                          \
                                    \
    __asm mov cl, bl                \
    ADD(4)                          \
                                    \
    ASM32                           \
    __asm rol bx, 16                \
    __asm mov cl, bh                \
    XOR(8)                          \
                                    \
    __asm mov cl, bl                \
    ADD(12)                         \
                                    \
    XORRM_1((n-1)*4)                \
                                    \
    ASM32                           \
    __asm xor ax, dx 
      
    /* ROUNDS */
    ROUND(16);
    ROUND(14);
    ROUND(12);
    ROUND(10);
    ROUND(8);
    ROUND(6);
    ROUND(4);
    ROUND(2);
#undef ROUND

  __asm
    {
      /* xr ^= P[0] */

      XORRM_2;
      /* xor bx, [di]; */

      PRE32;
      xor si, si;

      /* Get the output -> ds:si */
      lds si, dword ptr output;

      MOVRM_2;
      /* mov [si], bx; */
      MOVRM_1(4);
      /* mov [si + 4], ax; */

      pop ds;
    }
}

#else /* !WIN32 */
 
/* The optimized Blowfish encrypt/decrypt functions for 32-bit Windows */

void ssh_blowfish_encrypt(SshBlowfishContext *context,
                          SshUInt32 xl, SshUInt32 xr,
                          SshUInt32 *output)
{
  __asm
    {    
      /* Get addresses of P and S boxes */
      mov esi, context;
      mov edi, esi;
      add edi, 1024*4;
      
      mov eax, xl;
      mov ebx, xr;
      
      xor eax, [edi];
      xor ecx, ecx;
    };
  
#define ROUND(n)                         \
    __asm rol eax, 16                    \
    __asm mov cl, ah                     \
    __asm mov edx, [esi + ecx*4]         \
                                         \
    __asm mov cl, al                     \
    __asm add edx, [esi + ecx*4 + 256*4] \
                                         \
    __asm rol eax, 16                    \
    __asm mov cl, ah                     \
    __asm xor edx, [esi + ecx*4 + 512*4] \
                                         \
    __asm mov cl, al                     \
    __asm add edx, [esi + ecx*4 + 768*4] \
                                         \
    __asm xor edx, [edi + n*4]           \
                                         \
    __asm xor ebx, edx                   \
    /* SWAP */                           \
    __asm rol ebx, 16                    \
    __asm mov cl, bh                     \
    __asm mov edx, [esi + ecx*4]         \
                                         \
    __asm mov cl, bl                     \
    __asm add edx, [esi + ecx*4 + 256*4] \
                                         \
    __asm rol ebx, 16                    \
    __asm mov cl, bh                     \
    __asm xor edx, [esi + ecx*4 + 512*4] \
                                         \
    __asm mov cl, bl                     \
    __asm add edx, [esi + ecx*4 + 768*4] \
                                         \
    __asm xor edx, [edi + (n+1)*4]       \
                                         \
    __asm xor eax, edx 
      
    /* ROUNDS */
    ROUND(1)
    ROUND(3)
    ROUND(5)
    ROUND(7)
    ROUND(9)
    ROUND(11)
    ROUND(13)
    ROUND(15)
#undef ROUND

  __asm
    {
      /* xr ^= P[17] */
      
      xor ebx, [edi + 17*4];
      mov esi, output;
      
      mov [esi], ebx;
      mov [esi + 4], eax;
    };
}

void ssh_blowfish_decrypt(SshBlowfishContext *context, SshUInt32 xl,
                          SshUInt32 xr,
                          SshUInt32 *output)
{
  __asm
    {
      
      /* Get addresses of P and S boxes */
      mov esi, context;
      mov edi, esi;
      add edi, 1024*4;
      
      mov eax, xl;
      mov ebx, xr;
      
      xor eax, [edi + 17*4];
      xor ecx, ecx;
    };
      
#define ROUND(n)                         \
    __asm rol eax, 16                    \
    __asm mov cl, ah                     \
    __asm mov edx, [esi + ecx*4]         \
                                         \
    __asm mov cl, al                     \
    __asm add edx, [esi + ecx*4 + 256*4] \
                                         \
    __asm rol eax, 16                    \
    __asm mov cl, ah                     \
    __asm xor edx, [esi + ecx*4 + 512*4] \
                                         \
    __asm mov cl, al                     \
    __asm add edx, [esi + ecx*4 + 768*4] \
                                         \
    __asm xor edx, [edi + n*4]           \
                                         \
    __asm xor ebx, edx                   \
    /* SWAP */                           \
    __asm rol ebx, 16                    \
    __asm mov cl, bh                     \
    __asm mov edx, [esi + ecx*4]         \
                                         \
    __asm mov cl, bl                     \
    __asm add edx, [esi + ecx*4 + 256*4] \
                                         \
    __asm rol ebx, 16                    \
    __asm mov cl, bh                     \
    __asm xor edx, [esi + ecx*4 + 512*4] \
                                         \
    __asm mov cl, bl                     \
    __asm add edx, [esi + ecx*4 + 768*4] \
                                         \
    __asm xor edx, [edi + (n-1)*4]       \
                                         \
    __asm xor eax, edx 

    /* ROUNDS */
    ROUND(16)
    ROUND(14)
    ROUND(12)
    ROUND(10)
    ROUND(8)
    ROUND(6)
    ROUND(4)
    ROUND(2)
#undef ROUND

  __asm
    {
      /* xr ^= P[0] */
      
      xor ebx, [edi];
      mov esi, output;
      
      mov [esi], ebx;
      mov [esi + 4], eax;
    };
}

#endif /* !WIN32 */
#endif /* WINDOWS */

/* Sets the blowfish S and P boxes for encryption and decryption. */

void ssh_blowfish_set_key(SshBlowfishContext *context,
                          const unsigned char *key, size_t keybytes,
                          Boolean for_encyption)
{
  short i;
  short j;
  short count;
  SshUInt32 data_l;
  SshUInt32 data_r;
  SshUInt32 temp;
  SshUInt32 *P = context -> P;
  SshUInt32 *S = context -> S;
  SshUInt32 output[2];
  
  /* Copy the initialization s-boxes */
    
  for (i = 0, count = 0; i < 256; i ++)
    for (j = 0; j < 4; j++, count++ )
      S[count] = ssh_blowfish_sbox[count];

  /* Set the p-boxes */
  
  for (i = 0; i < 16 + 2; i++)
    P[i] = ssh_blowfish_pbox[i];
  
  /* Actual subkey generation */
  
  for (j = 0, i = 0; i < 16 + 2; i++)
    {
      temp = (((SshUInt32)key[j] << 24) |
             ((SshUInt32)key[(j + 1) % keybytes] << 16) |
             ((SshUInt32)key[(j + 2) % keybytes] << 8) |
             ((SshUInt32)key[(j + 3) % keybytes]));
       
      P[i] = P[i] ^ temp;
      j = (j + 4) % keybytes;
    }

  data_l = 0x00000000;
  data_r = 0x00000000;

  for (i = 0; i < 16 + 2; i += 2)
    {
      ssh_blowfish_encrypt(context, data_l, data_r, output);

      data_l = output[0];
      data_r = output[1];

      P[i] = data_l;
      P[i + 1] = data_r;
    }

  for (i = 0; i < 4; i++)
    {
      for (j = 0, count = i * 256; j < 256; j += 2, count += 2)
        {
          ssh_blowfish_encrypt(context, data_l, data_r, output);

          data_l = output[0];
          data_r = output[1];
          
          S[count] = data_l;
          S[count + 1] = data_r;
        }
    }
}

size_t ssh_blowfish_ctxsize()
{
  return sizeof(SshBlowfishContext);
}

Boolean ssh_blowfish_init(void *context,
                          const unsigned char *key, size_t keylen,
                          Boolean for_encryption)
{
  SshBlowfishContext *ctx = context;

  ctx->for_encryption = for_encryption;
  ssh_blowfish_set_key(ctx, key, keylen, for_encryption);
  
  return TRUE;
}  
                         
void ssh_blowfish_ecb(void *context, unsigned char *dest,
                      const unsigned char *src, size_t len,
                      unsigned char *iv)
{
  SshBlowfishContext *ctx = (SshBlowfishContext *)context;
  SshUInt32 output[2], l, r;
  
  if (ctx->for_encryption)
    {
      while (len)
        {
          l = SSH_GET_32BIT(src);
          r = SSH_GET_32BIT(src + 4);

          ssh_blowfish_encrypt(ctx, l, r, output);

          SSH_PUT_32BIT(dest, output[0]);
          SSH_PUT_32BIT(dest + 4, output[1]);

          src += 8;
          dest += 8;
          len -= 8;
        }
    }
  else
    {
      while (len)
        {
          l = SSH_GET_32BIT(src);
          r = SSH_GET_32BIT(src + 4);

          ssh_blowfish_decrypt(ctx, l, r, output);

          SSH_PUT_32BIT(dest, output[0]);
          SSH_PUT_32BIT(dest + 4, output[1]);

          src += 8;
          dest += 8;
          len -= 8;
        }
    }
}

void ssh_blowfish_cbc(void *context, unsigned char *dest,
                      const unsigned char *src, size_t len,
                      unsigned char *iv_arg)
{
  SshBlowfishContext *ctx = (SshBlowfishContext *)context;
  SshUInt32 l, r, iv[2], temp[2];

  iv[0] = SSH_GET_32BIT(iv_arg);
  iv[1] = SSH_GET_32BIT(iv_arg + 4);
  
  if (ctx->for_encryption)
    {
      while (len)
        {
          l = SSH_GET_32BIT(src) ^ iv[0];
          r = SSH_GET_32BIT(src + 4) ^ iv[1];

          ssh_blowfish_encrypt(ctx, l, r, iv);

          SSH_PUT_32BIT(dest, iv[0]);
          SSH_PUT_32BIT(dest + 4, iv[1]);

          src += 8;
          dest += 8;
          len -= 8;
        }
    }
  else
    {
      while (len)
        {
          l = SSH_GET_32BIT(src);
          r = SSH_GET_32BIT(src + 4);

          ssh_blowfish_decrypt(ctx, l, r, temp);

          temp[0] ^= iv[0];
          temp[1] ^= iv[1];
          
          SSH_PUT_32BIT(dest, temp[0]);
          SSH_PUT_32BIT(dest + 4, temp[1]);

          iv[0] = l;
          iv[1] = r;
          
          src += 8;
          dest += 8;
          len -= 8;
        }
    }

  SSH_PUT_32BIT(iv_arg, iv[0]);
  SSH_PUT_32BIT(iv_arg + 4, iv[1]);
}

void ssh_blowfish_cfb(void *context, unsigned char *dest,
                      const unsigned char *src, size_t len,
                      unsigned char *iv)
{
  SshBlowfishContext *ctx = (SshBlowfishContext *)context;
  SshUInt32 l, r, temp[2];

  l = SSH_GET_32BIT(iv);
  r = SSH_GET_32BIT(iv + 4);
  
  if (ctx->for_encryption)
    {
      while (len)
        {
          ssh_blowfish_encrypt(ctx, l, r, temp); 
          
          l = SSH_GET_32BIT(src) ^ temp[0];
          r = SSH_GET_32BIT(src + 4) ^ temp[1];

          temp[0] = l;
          temp[1] = r;
          
          SSH_PUT_32BIT(dest, temp[0]);
          SSH_PUT_32BIT(dest + 4, temp[1]);

          src += 8;
          dest += 8;
          len -= 8;
        }
    }
  else
    {
      while (len)
        {
          ssh_blowfish_encrypt(ctx, l, r, temp);
          
          l = SSH_GET_32BIT(src);
          r = SSH_GET_32BIT(src + 4);

          temp[0] ^= l;
          temp[1] ^= r;
          
          SSH_PUT_32BIT(dest, temp[0]);
          SSH_PUT_32BIT(dest + 4, temp[1]);

          src += 8;
          dest += 8;
          len -= 8;
        }
    }

  SSH_PUT_32BIT(iv, l);
  SSH_PUT_32BIT(iv + 4, r);
}

void ssh_blowfish_ofb(void *context, unsigned char *dest,
                      const unsigned char *src, size_t len,
                      unsigned char *iv_arg)
{
  SshBlowfishContext *ctx = (SshBlowfishContext *)context;
  SshUInt32 iv[2], l, r;

  iv[0] = SSH_GET_32BIT(iv_arg);
  iv[1] = SSH_GET_32BIT(iv_arg + 4);
  
  while (len)
    {
      l = iv[0];
      r = iv[1];
      
      ssh_blowfish_encrypt(ctx, l, r, iv);
      
      l = SSH_GET_32BIT(src) ^ iv[0];
      r = SSH_GET_32BIT(src + 4) ^ iv[1];
      
      SSH_PUT_32BIT(dest, l);
      SSH_PUT_32BIT(dest + 4, r);
      
      src += 8;
      dest += 8;
      len -= 8;
    }

  SSH_PUT_32BIT(iv_arg, iv[0]);
  SSH_PUT_32BIT(iv_arg + 4, iv[1]);
}

#endif /* WITHOUT_BLOWFISH */
