/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.] */

#include <openssl/blowfish.h>
#include <openssl/cipher.h>
#include <openssl/obj.h>

#include <assert.h>
#include <string.h>

#include "../../crypto/internal.h"
#include "../macros.h"


#define BF_ENC(LL, R, S, P)                                               \
  (LL ^= P,                                                               \
   LL ^=                                                                  \
   (((S[((int)(R >> 24) & 0xff)] + S[0x0100 + ((int)(R >> 16) & 0xff)]) ^ \
     S[0x0200 + ((int)(R >> 8) & 0xff)]) +                                \
    S[0x0300 + ((int)(R)&0xff)]) &                                        \
   0xffffffffL)

void BF_encrypt(uint32_t *data, const BF_KEY *key) {
  uint32_t l, r;
  const uint32_t *p, *s;

  p = key->P;
  s = &(key->S[0]);
  l = data[0];
  r = data[1];

  l ^= p[0];
  BF_ENC(r, l, s, p[1]);
  BF_ENC(l, r, s, p[2]);
  BF_ENC(r, l, s, p[3]);
  BF_ENC(l, r, s, p[4]);
  BF_ENC(r, l, s, p[5]);
  BF_ENC(l, r, s, p[6]);
  BF_ENC(r, l, s, p[7]);
  BF_ENC(l, r, s, p[8]);
  BF_ENC(r, l, s, p[9]);
  BF_ENC(l, r, s, p[10]);
  BF_ENC(r, l, s, p[11]);
  BF_ENC(l, r, s, p[12]);
  BF_ENC(r, l, s, p[13]);
  BF_ENC(l, r, s, p[14]);
  BF_ENC(r, l, s, p[15]);
  BF_ENC(l, r, s, p[16]);
  r ^= p[BF_ROUNDS + 1];

  data[1] = l & 0xffffffffL;
  data[0] = r & 0xffffffffL;
}

void BF_decrypt(uint32_t *data, const BF_KEY *key) {
  uint32_t l, r;
  const uint32_t *p, *s;

  p = key->P;
  s = &(key->S[0]);
  l = data[0];
  r = data[1];

  l ^= p[BF_ROUNDS + 1];
  BF_ENC(r, l, s, p[16]);
  BF_ENC(l, r, s, p[15]);
  BF_ENC(r, l, s, p[14]);
  BF_ENC(l, r, s, p[13]);
  BF_ENC(r, l, s, p[12]);
  BF_ENC(l, r, s, p[11]);
  BF_ENC(r, l, s, p[10]);
  BF_ENC(l, r, s, p[9]);
  BF_ENC(r, l, s, p[8]);
  BF_ENC(l, r, s, p[7]);
  BF_ENC(r, l, s, p[6]);
  BF_ENC(l, r, s, p[5]);
  BF_ENC(r, l, s, p[4]);
  BF_ENC(l, r, s, p[3]);
  BF_ENC(r, l, s, p[2]);
  BF_ENC(l, r, s, p[1]);
  r ^= p[0];

  data[1] = l & 0xffffffffL;
  data[0] = r & 0xffffffffL;
}

void BF_ecb_encrypt(const uint8_t *in, uint8_t *out,
                    const BF_KEY *key, int encrypt) {
  uint32_t d[2];

  n2l(in, d[0]);
  n2l(in, d[1]);
  if (encrypt) {
    BF_encrypt(d, key);
  } else {
    BF_decrypt(d, key);
  }
  l2n(d[0], out);
  l2n(d[1], out);
}

void BF_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
                    const BF_KEY *schedule, uint8_t *ivec, int encrypt) {
  uint32_t tin0, tin1;
  uint32_t tout0, tout1, xor0, xor1;
  size_t l = length;
  uint32_t tin[2];

  if (encrypt) {
    n2l(ivec, tout0);
    n2l(ivec, tout1);
    ivec -= 8;
    while (l >= 8) {
      n2l(in, tin0);
      n2l(in, tin1);
      tin0 ^= tout0;
      tin1 ^= tout1;
      tin[0] = tin0;
      tin[1] = tin1;
      BF_encrypt(tin, schedule);
      tout0 = tin[0];
      tout1 = tin[1];
      l2n(tout0, out);
      l2n(tout1, out);
      l -= 8;
    }
    if (l != 0) {
      n2ln(in, tin0, tin1, l);
      tin0 ^= tout0;
      tin1 ^= tout1;
      tin[0] = tin0;
      tin[1] = tin1;
      BF_encrypt(tin, schedule);
      tout0 = tin[0];
      tout1 = tin[1];
      l2n(tout0, out);
      l2n(tout1, out);
    }
    l2n(tout0, ivec);
    l2n(tout1, ivec);
  } else {
    n2l(ivec, xor0);
    n2l(ivec, xor1);
    ivec -= 8;
    while (l >= 8) {
      n2l(in, tin0);
      n2l(in, tin1);
      tin[0] = tin0;
      tin[1] = tin1;
      BF_decrypt(tin, schedule);
      tout0 = tin[0] ^ xor0;
      tout1 = tin[1] ^ xor1;
      l2n(tout0, out);
      l2n(tout1, out);
      xor0 = tin0;
      xor1 = tin1;
      l -= 8;
    }
    if (l != 0) {
      n2l(in, tin0);
      n2l(in, tin1);
      tin[0] = tin0;
      tin[1] = tin1;
      BF_decrypt(tin, schedule);
      tout0 = tin[0] ^ xor0;
      tout1 = tin[1] ^ xor1;
      l2nn(tout0, tout1, out, l);
      xor0 = tin0;
      xor1 = tin1;
    }
    l2n(xor0, ivec);
    l2n(xor1, ivec);
  }
  tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
  tin[0] = tin[1] = 0;
}

static const BF_KEY bf_init = {
    {0x243f6a88L, 0x85a308d3L, 0x13198a2eL, 0x03707344L, 0xa4093822L,
     0x299f31d0L, 0x082efa98L, 0xec4e6c89L, 0x452821e6L, 0x38d01377L,
     0xbe5466cfL, 0x34e90c6cL, 0xc0ac29b7L, 0xc97c50ddL, 0x3f84d5b5L,
     0xb5470917L, 0x9216d5d9L, 0x8979fb1b},
    {
     0xd1310ba6L, 0x98dfb5acL, 0x2ffd72dbL, 0xd01adfb7L, 0xb8e1afedL,
     0x6a267e96L, 0xba7c9045L, 0xf12c7f99L, 0x24a19947L, 0xb3916cf7L,
     0x0801f2e2L, 0x858efc16L, 0x636920d8L, 0x71574e69L, 0xa458fea3L,
     0xf4933d7eL, 0x0d95748fL, 0x728eb658L, 0x718bcd58L, 0x82154aeeL,
     0x7b54a41dL, 0xc25a59b5L, 0x9c30d539L, 0x2af26013L, 0xc5d1b023L,
     0x286085f0L, 0xca417918L, 0xb8db38efL, 0x8e79dcb0L, 0x603a180eL,
     0x6c9e0e8bL, 0xb01e8a3eL, 0xd71577c1L, 0xbd314b27L, 0x78af2fdaL,
     0x55605c60L, 0xe65525f3L, 0xaa55ab94L, 0x57489862L, 0x63e81440L,
     0x55ca396aL, 0x2aab10b6L, 0xb4cc5c34L, 0x1141e8ceL, 0xa15486afL,
     0x7c72e993L, 0xb3ee1411L, 0x636fbc2aL, 0x2ba9c55dL, 0x741831f6L,
     0xce5c3e16L, 0x9b87931eL, 0xafd6ba33L, 0x6c24cf5cL, 0x7a325381L,
     0x28958677L, 0x3b8f4898L, 0x6b4bb9afL, 0xc4bfe81bL, 0x66282193L,
     0x61d809ccL, 0xfb21a991L, 0x487cac60L, 0x5dec8032L, 0xef845d5dL,
     0xe98575b1L, 0xdc262302L, 0xeb651b88L, 0x23893e81L, 0xd396acc5L,
     0x0f6d6ff3L, 0x83f44239L, 0x2e0b4482L, 0xa4842004L, 0x69c8f04aL,
     0x9e1f9b5eL, 0x21c66842L, 0xf6e96c9aL, 0x670c9c61L, 0xabd388f0L,
     0x6a51a0d2L, 0xd8542f68L, 0x960fa728L, 0xab5133a3L, 0x6eef0b6cL,
     0x137a3be4L, 0xba3bf050L, 0x7efb2a98L, 0xa1f1651dL, 0x39af0176L,
     0x66ca593eL, 0x82430e88L, 0x8cee8619L, 0x456f9fb4L, 0x7d84a5c3L,
     0x3b8b5ebeL, 0xe06f75d8L, 0x85c12073L, 0x401a449fL, 0x56c16aa6L,
     0x4ed3aa62L, 0x363f7706L, 0x1bfedf72L, 0x429b023dL, 0x37d0d724L,
     0xd00a1248L, 0xdb0fead3L, 0x49f1c09bL, 0x075372c9L, 0x80991b7bL,
     0x25d479d8L, 0xf6e8def7L, 0xe3fe501aL, 0xb6794c3bL, 0x976ce0bdL,
     0x04c006baL, 0xc1a94fb6L, 0x409f60c4L, 0x5e5c9ec2L, 0x196a2463L,
     0x68fb6fafL, 0x3e6c53b5L, 0x1339b2ebL, 0x3b52ec6fL, 0x6dfc511fL,
     0x9b30952cL, 0xcc814544L, 0xaf5ebd09L, 0xbee3d004L, 0xde334afdL,
     0x660f2807L, 0x192e4bb3L, 0xc0cba857L, 0x45c8740fL, 0xd20b5f39L,
     0xb9d3fbdbL, 0x5579c0bdL, 0x1a60320aL, 0xd6a100c6L, 0x402c7279L,
     0x679f25feL, 0xfb1fa3ccL, 0x8ea5e9f8L, 0xdb3222f8L, 0x3c7516dfL,
     0xfd616b15L, 0x2f501ec8L, 0xad0552abL, 0x323db5faL, 0xfd238760L,
     0x53317b48L, 0x3e00df82L, 0x9e5c57bbL, 0xca6f8ca0L, 0x1a87562eL,
     0xdf1769dbL, 0xd542a8f6L, 0x287effc3L, 0xac6732c6L, 0x8c4f5573L,
     0x695b27b0L, 0xbbca58c8L, 0xe1ffa35dL, 0xb8f011a0L, 0x10fa3d98L,
     0xfd2183b8L, 0x4afcb56cL, 0x2dd1d35bL, 0x9a53e479L, 0xb6f84565L,
     0xd28e49bcL, 0x4bfb9790L, 0xe1ddf2daL, 0xa4cb7e33L, 0x62fb1341L,
     0xcee4c6e8L, 0xef20cadaL, 0x36774c01L, 0xd07e9efeL, 0x2bf11fb4L,
     0x95dbda4dL, 0xae909198L, 0xeaad8e71L, 0x6b93d5a0L, 0xd08ed1d0L,
     0xafc725e0L, 0x8e3c5b2fL, 0x8e7594b7L, 0x8ff6e2fbL, 0xf2122b64L,
     0x8888b812L, 0x900df01cL, 0x4fad5ea0L, 0x688fc31cL, 0xd1cff191L,
     0xb3a8c1adL, 0x2f2f2218L, 0xbe0e1777L, 0xea752dfeL, 0x8b021fa1L,
     0xe5a0cc0fL, 0xb56f74e8L, 0x18acf3d6L, 0xce89e299L, 0xb4a84fe0L,
     0xfd13e0b7L, 0x7cc43b81L, 0xd2ada8d9L, 0x165fa266L, 0x80957705L,
     0x93cc7314L, 0x211a1477L, 0xe6ad2065L, 0x77b5fa86L, 0xc75442f5L,
     0xfb9d35cfL, 0xebcdaf0cL, 0x7b3e89a0L, 0xd6411bd3L, 0xae1e7e49L,
     0x00250e2dL, 0x2071b35eL, 0x226800bbL, 0x57b8e0afL, 0x2464369bL,
     0xf009b91eL, 0x5563911dL, 0x59dfa6aaL, 0x78c14389L, 0xd95a537fL,
     0x207d5ba2L, 0x02e5b9c5L, 0x83260376L, 0x6295cfa9L, 0x11c81968L,
     0x4e734a41L, 0xb3472dcaL, 0x7b14a94aL, 0x1b510052L, 0x9a532915L,
     0xd60f573fL, 0xbc9bc6e4L, 0x2b60a476L, 0x81e67400L, 0x08ba6fb5L,
     0x571be91fL, 0xf296ec6bL, 0x2a0dd915L, 0xb6636521L, 0xe7b9f9b6L,
     0xff34052eL, 0xc5855664L, 0x53b02d5dL, 0xa99f8fa1L, 0x08ba4799L,
     0x6e85076aL, 0x4b7a70e9L, 0xb5b32944L, 0xdb75092eL, 0xc4192623L,
     0xad6ea6b0L, 0x49a7df7dL, 0x9cee60b8L, 0x8fedb266L, 0xecaa8c71L,
     0x699a17ffL, 0x5664526cL, 0xc2b19ee1L, 0x193602a5L, 0x75094c29L,
     0xa0591340L, 0xe4183a3eL, 0x3f54989aL, 0x5b429d65L, 0x6b8fe4d6L,
     0x99f73fd6L, 0xa1d29c07L, 0xefe830f5L, 0x4d2d38e6L, 0xf0255dc1L,
     0x4cdd2086L, 0x8470eb26L, 0x6382e9c6L, 0x021ecc5eL, 0x09686b3fL,
     0x3ebaefc9L, 0x3c971814L, 0x6b6a70a1L, 0x687f3584L, 0x52a0e286L,
     0xb79c5305L, 0xaa500737L, 0x3e07841cL, 0x7fdeae5cL, 0x8e7d44ecL,
     0x5716f2b8L, 0xb03ada37L, 0xf0500c0dL, 0xf01c1f04L, 0x0200b3ffL,
     0xae0cf51aL, 0x3cb574b2L, 0x25837a58L, 0xdc0921bdL, 0xd19113f9L,
     0x7ca92ff6L, 0x94324773L, 0x22f54701L, 0x3ae5e581L, 0x37c2dadcL,
     0xc8b57634L, 0x9af3dda7L, 0xa9446146L, 0x0fd0030eL, 0xecc8c73eL,
     0xa4751e41L, 0xe238cd99L, 0x3bea0e2fL, 0x3280bba1L, 0x183eb331L,
     0x4e548b38L, 0x4f6db908L, 0x6f420d03L, 0xf60a04bfL, 0x2cb81290L,
     0x24977c79L, 0x5679b072L, 0xbcaf89afL, 0xde9a771fL, 0xd9930810L,
     0xb38bae12L, 0xdccf3f2eL, 0x5512721fL, 0x2e6b7124L, 0x501adde6L,
     0x9f84cd87L, 0x7a584718L, 0x7408da17L, 0xbc9f9abcL, 0xe94b7d8cL,
     0xec7aec3aL, 0xdb851dfaL, 0x63094366L, 0xc464c3d2L, 0xef1c1847L,
     0x3215d908L, 0xdd433b37L, 0x24c2ba16L, 0x12a14d43L, 0x2a65c451L,
     0x50940002L, 0x133ae4ddL, 0x71dff89eL, 0x10314e55L, 0x81ac77d6L,
     0x5f11199bL, 0x043556f1L, 0xd7a3c76bL, 0x3c11183bL, 0x5924a509L,
     0xf28fe6edL, 0x97f1fbfaL, 0x9ebabf2cL, 0x1e153c6eL, 0x86e34570L,
     0xeae96fb1L, 0x860e5e0aL, 0x5a3e2ab3L, 0x771fe71cL, 0x4e3d06faL,
     0x2965dcb9L, 0x99e71d0fL, 0x803e89d6L, 0x5266c825L, 0x2e4cc978L,
     0x9c10b36aL, 0xc6150ebaL, 0x94e2ea78L, 0xa5fc3c53L, 0x1e0a2df4L,
     0xf2f74ea7L, 0x361d2b3dL, 0x1939260fL, 0x19c27960L, 0x5223a708L,
     0xf71312b6L, 0xebadfe6eL, 0xeac31f66L, 0xe3bc4595L, 0xa67bc883L,
     0xb17f37d1L, 0x018cff28L, 0xc332ddefL, 0xbe6c5aa5L, 0x65582185L,
     0x68ab9802L, 0xeecea50fL, 0xdb2f953bL, 0x2aef7dadL, 0x5b6e2f84L,
     0x1521b628L, 0x29076170L, 0xecdd4775L, 0x619f1510L, 0x13cca830L,
     0xeb61bd96L, 0x0334fe1eL, 0xaa0363cfL, 0xb5735c90L, 0x4c70a239L,
     0xd59e9e0bL, 0xcbaade14L, 0xeecc86bcL, 0x60622ca7L, 0x9cab5cabL,
     0xb2f3846eL, 0x648b1eafL, 0x19bdf0caL, 0xa02369b9L, 0x655abb50L,
     0x40685a32L, 0x3c2ab4b3L, 0x319ee9d5L, 0xc021b8f7L, 0x9b540b19L,
     0x875fa099L, 0x95f7997eL, 0x623d7da8L, 0xf837889aL, 0x97e32d77L,
     0x11ed935fL, 0x16681281L, 0x0e358829L, 0xc7e61fd6L, 0x96dedfa1L,
     0x7858ba99L, 0x57f584a5L, 0x1b227263L, 0x9b83c3ffL, 0x1ac24696L,
     0xcdb30aebL, 0x532e3054L, 0x8fd948e4L, 0x6dbc3128L, 0x58ebf2efL,
     0x34c6ffeaL, 0xfe28ed61L, 0xee7c3c73L, 0x5d4a14d9L, 0xe864b7e3L,
     0x42105d14L, 0x203e13e0L, 0x45eee2b6L, 0xa3aaabeaL, 0xdb6c4f15L,
     0xfacb4fd0L, 0xc742f442L, 0xef6abbb5L, 0x654f3b1dL, 0x41cd2105L,
     0xd81e799eL, 0x86854dc7L, 0xe44b476aL, 0x3d816250L, 0xcf62a1f2L,
     0x5b8d2646L, 0xfc8883a0L, 0xc1c7b6a3L, 0x7f1524c3L, 0x69cb7492L,
     0x47848a0bL, 0x5692b285L, 0x095bbf00L, 0xad19489dL, 0x1462b174L,
     0x23820e00L, 0x58428d2aL, 0x0c55f5eaL, 0x1dadf43eL, 0x233f7061L,
     0x3372f092L, 0x8d937e41L, 0xd65fecf1L, 0x6c223bdbL, 0x7cde3759L,
     0xcbee7460L, 0x4085f2a7L, 0xce77326eL, 0xa6078084L, 0x19f8509eL,
     0xe8efd855L, 0x61d99735L, 0xa969a7aaL, 0xc50c06c2L, 0x5a04abfcL,
     0x800bcadcL, 0x9e447a2eL, 0xc3453484L, 0xfdd56705L, 0x0e1e9ec9L,
     0xdb73dbd3L, 0x105588cdL, 0x675fda79L, 0xe3674340L, 0xc5c43465L,
     0x713e38d8L, 0x3d28f89eL, 0xf16dff20L, 0x153e21e7L, 0x8fb03d4aL,
     0xe6e39f2bL, 0xdb83adf7L, 0xe93d5a68L, 0x948140f7L, 0xf64c261cL,
     0x94692934L, 0x411520f7L, 0x7602d4f7L, 0xbcf46b2eL, 0xd4a20068L,
     0xd4082471L, 0x3320f46aL, 0x43b7d4b7L, 0x500061afL, 0x1e39f62eL,
     0x97244546L, 0x14214f74L, 0xbf8b8840L, 0x4d95fc1dL, 0x96b591afL,
     0x70f4ddd3L, 0x66a02f45L, 0xbfbc09ecL, 0x03bd9785L, 0x7fac6dd0L,
     0x31cb8504L, 0x96eb27b3L, 0x55fd3941L, 0xda2547e6L, 0xabca0a9aL,
     0x28507825L, 0x530429f4L, 0x0a2c86daL, 0xe9b66dfbL, 0x68dc1462L,
     0xd7486900L, 0x680ec0a4L, 0x27a18deeL, 0x4f3ffea2L, 0xe887ad8cL,
     0xb58ce006L, 0x7af4d6b6L, 0xaace1e7cL, 0xd3375fecL, 0xce78a399L,
     0x406b2a42L, 0x20fe9e35L, 0xd9f385b9L, 0xee39d7abL, 0x3b124e8bL,
     0x1dc9faf7L, 0x4b6d1856L, 0x26a36631L, 0xeae397b2L, 0x3a6efa74L,
     0xdd5b4332L, 0x6841e7f7L, 0xca7820fbL, 0xfb0af54eL, 0xd8feb397L,
     0x454056acL, 0xba489527L, 0x55533a3aL, 0x20838d87L, 0xfe6ba9b7L,
     0xd096954bL, 0x55a867bcL, 0xa1159a58L, 0xcca92963L, 0x99e1db33L,
     0xa62a4a56L, 0x3f3125f9L, 0x5ef47e1cL, 0x9029317cL, 0xfdf8e802L,
     0x04272f70L, 0x80bb155cL, 0x05282ce3L, 0x95c11548L, 0xe4c66d22L,
     0x48c1133fL, 0xc70f86dcL, 0x07f9c9eeL, 0x41041f0fL, 0x404779a4L,
     0x5d886e17L, 0x325f51ebL, 0xd59bc0d1L, 0xf2bcc18fL, 0x41113564L,
     0x257b7834L, 0x602a9c60L, 0xdff8e8a3L, 0x1f636c1bL, 0x0e12b4c2L,
     0x02e1329eL, 0xaf664fd1L, 0xcad18115L, 0x6b2395e0L, 0x333e92e1L,
     0x3b240b62L, 0xeebeb922L, 0x85b2a20eL, 0xe6ba0d99L, 0xde720c8cL,
     0x2da2f728L, 0xd0127845L, 0x95b794fdL, 0x647d0862L, 0xe7ccf5f0L,
     0x5449a36fL, 0x877d48faL, 0xc39dfd27L, 0xf33e8d1eL, 0x0a476341L,
     0x992eff74L, 0x3a6f6eabL, 0xf4f8fd37L, 0xa812dc60L, 0xa1ebddf8L,
     0x991be14cL, 0xdb6e6b0dL, 0xc67b5510L, 0x6d672c37L, 0x2765d43bL,
     0xdcd0e804L, 0xf1290dc7L, 0xcc00ffa3L, 0xb5390f92L, 0x690fed0bL,
     0x667b9ffbL, 0xcedb7d9cL, 0xa091cf0bL, 0xd9155ea3L, 0xbb132f88L,
     0x515bad24L, 0x7b9479bfL, 0x763bd6ebL, 0x37392eb3L, 0xcc115979L,
     0x8026e297L, 0xf42e312dL, 0x6842ada7L, 0xc66a2b3bL, 0x12754cccL,
     0x782ef11cL, 0x6a124237L, 0xb79251e7L, 0x06a1bbe6L, 0x4bfb6350L,
     0x1a6b1018L, 0x11caedfaL, 0x3d25bdd8L, 0xe2e1c3c9L, 0x44421659L,
     0x0a121386L, 0xd90cec6eL, 0xd5abea2aL, 0x64af674eL, 0xda86a85fL,
     0xbebfe988L, 0x64e4c3feL, 0x9dbc8057L, 0xf0f7c086L, 0x60787bf8L,
     0x6003604dL, 0xd1fd8346L, 0xf6381fb0L, 0x7745ae04L, 0xd736fcccL,
     0x83426b33L, 0xf01eab71L, 0xb0804187L, 0x3c005e5fL, 0x77a057beL,
     0xbde8ae24L, 0x55464299L, 0xbf582e61L, 0x4e58f48fL, 0xf2ddfda2L,
     0xf474ef38L, 0x8789bdc2L, 0x5366f9c3L, 0xc8b38e74L, 0xb475f255L,
     0x46fcd9b9L, 0x7aeb2661L, 0x8b1ddf84L, 0x846a0e79L, 0x915f95e2L,
     0x466e598eL, 0x20b45770L, 0x8cd55591L, 0xc902de4cL, 0xb90bace1L,
     0xbb8205d0L, 0x11a86248L, 0x7574a99eL, 0xb77f19b6L, 0xe0a9dc09L,
     0x662d09a1L, 0xc4324633L, 0xe85a1f02L, 0x09f0be8cL, 0x4a99a025L,
     0x1d6efe10L, 0x1ab93d1dL, 0x0ba5a4dfL, 0xa186f20fL, 0x2868f169L,
     0xdcb7da83L, 0x573906feL, 0xa1e2ce9bL, 0x4fcd7f52L, 0x50115e01L,
     0xa70683faL, 0xa002b5c4L, 0x0de6d027L, 0x9af88c27L, 0x773f8641L,
     0xc3604c06L, 0x61a806b5L, 0xf0177a28L, 0xc0f586e0L, 0x006058aaL,
     0x30dc7d62L, 0x11e69ed7L, 0x2338ea63L, 0x53c2dd94L, 0xc2c21634L,
     0xbbcbee56L, 0x90bcb6deL, 0xebfc7da1L, 0xce591d76L, 0x6f05e409L,
     0x4b7c0188L, 0x39720a3dL, 0x7c927c24L, 0x86e3725fL, 0x724d9db9L,
     0x1ac15bb4L, 0xd39eb8fcL, 0xed545578L, 0x08fca5b5L, 0xd83d7cd3L,
     0x4dad0fc4L, 0x1e50ef5eL, 0xb161e6f8L, 0xa28514d9L, 0x6c51133cL,
     0x6fd5c7e7L, 0x56e14ec4L, 0x362abfceL, 0xddc6c837L, 0xd79a3234L,
     0x92638212L, 0x670efa8eL, 0x406000e0L, 0x3a39ce37L, 0xd3faf5cfL,
     0xabc27737L, 0x5ac52d1bL, 0x5cb0679eL, 0x4fa33742L, 0xd3822740L,
     0x99bc9bbeL, 0xd5118e9dL, 0xbf0f7315L, 0xd62d1c7eL, 0xc700c47bL,
     0xb78c1b6bL, 0x21a19045L, 0xb26eb1beL, 0x6a366eb4L, 0x5748ab2fL,
     0xbc946e79L, 0xc6a376d2L, 0x6549c2c8L, 0x530ff8eeL, 0x468dde7dL,
     0xd5730a1dL, 0x4cd04dc6L, 0x2939bbdbL, 0xa9ba4650L, 0xac9526e8L,
     0xbe5ee304L, 0xa1fad5f0L, 0x6a2d519aL, 0x63ef8ce2L, 0x9a86ee22L,
     0xc089c2b8L, 0x43242ef6L, 0xa51e03aaL, 0x9cf2d0a4L, 0x83c061baL,
     0x9be96a4dL, 0x8fe51550L, 0xba645bd6L, 0x2826a2f9L, 0xa73a3ae1L,
     0x4ba99586L, 0xef5562e9L, 0xc72fefd3L, 0xf752f7daL, 0x3f046f69L,
     0x77fa0a59L, 0x80e4a915L, 0x87b08601L, 0x9b09e6adL, 0x3b3ee593L,
     0xe990fd5aL, 0x9e34d797L, 0x2cf0b7d9L, 0x022b8b51L, 0x96d5ac3aL,
     0x017da67dL, 0xd1cf3ed6L, 0x7c7d2d28L, 0x1f9f25cfL, 0xadf2b89bL,
     0x5ad6b472L, 0x5a88f54cL, 0xe029ac71L, 0xe019a5e6L, 0x47b0acfdL,
     0xed93fa9bL, 0xe8d3c48dL, 0x283b57ccL, 0xf8d56629L, 0x79132e28L,
     0x785f0191L, 0xed756055L, 0xf7960e44L, 0xe3d35e8cL, 0x15056dd4L,
     0x88f46dbaL, 0x03a16125L, 0x0564f0bdL, 0xc3eb9e15L, 0x3c9057a2L,
     0x97271aecL, 0xa93a072aL, 0x1b3f6d9bL, 0x1e6321f5L, 0xf59c66fbL,
     0x26dcf319L, 0x7533d928L, 0xb155fdf5L, 0x03563482L, 0x8aba3cbbL,
     0x28517711L, 0xc20ad9f8L, 0xabcc5167L, 0xccad925fL, 0x4de81751L,
     0x3830dc8eL, 0x379d5862L, 0x9320f991L, 0xea7a90c2L, 0xfb3e7bceL,
     0x5121ce64L, 0x774fbe32L, 0xa8b6e37eL, 0xc3293d46L, 0x48de5369L,
     0x6413e680L, 0xa2ae0810L, 0xdd6db224L, 0x69852dfdL, 0x09072166L,
     0xb39a460aL, 0x6445c0ddL, 0x586cdecfL, 0x1c20c8aeL, 0x5bbef7ddL,
     0x1b588d40L, 0xccd2017fL, 0x6bb4e3bbL, 0xdda26a7eL, 0x3a59ff45L,
     0x3e350a44L, 0xbcb4cdd5L, 0x72eacea8L, 0xfa6484bbL, 0x8d6612aeL,
     0xbf3c6f47L, 0xd29be463L, 0x542f5d9eL, 0xaec2771bL, 0xf64e6370L,
     0x740e0d8dL, 0xe75b1357L, 0xf8721671L, 0xaf537d5dL, 0x4040cb08L,
     0x4eb4e2ccL, 0x34d2466aL, 0x0115af84L, 0xe1b00428L, 0x95983a1dL,
     0x06b89fb4L, 0xce6ea048L, 0x6f3f3b82L, 0x3520ab82L, 0x011a1d4bL,
     0x277227f8L, 0x611560b1L, 0xe7933fdcL, 0xbb3a792bL, 0x344525bdL,
     0xa08839e1L, 0x51ce794bL, 0x2f32c9b7L, 0xa01fbac9L, 0xe01cc87eL,
     0xbcc7d1f6L, 0xcf0111c3L, 0xa1e8aac7L, 0x1a908749L, 0xd44fbd9aL,
     0xd0dadecbL, 0xd50ada38L, 0x0339c32aL, 0xc6913667L, 0x8df9317cL,
     0xe0b12b4fL, 0xf79e59b7L, 0x43f5bb3aL, 0xf2d519ffL, 0x27d9459cL,
     0xbf97222cL, 0x15e6fc2aL, 0x0f91fc71L, 0x9b941525L, 0xfae59361L,
     0xceb69cebL, 0xc2a86459L, 0x12baa8d1L, 0xb6c1075eL, 0xe3056a0cL,
     0x10d25065L, 0xcb03a442L, 0xe0ec6e0eL, 0x1698db3bL, 0x4c98a0beL,
     0x3278e964L, 0x9f1f9532L, 0xe0d392dfL, 0xd3a0342bL, 0x8971f21eL,
     0x1b0a7441L, 0x4ba3348cL, 0xc5be7120L, 0xc37632d8L, 0xdf359f8dL,
     0x9b992f2eL, 0xe60b6f47L, 0x0fe3f11dL, 0xe54cda54L, 0x1edad891L,
     0xce6279cfL, 0xcd3e7e6fL, 0x1618b166L, 0xfd2c1d05L, 0x848fd2c5L,
     0xf6fb2299L, 0xf523f357L, 0xa6327623L, 0x93a83531L, 0x56cccd02L,
     0xacf08162L, 0x5a75ebb5L, 0x6e163697L, 0x88d273ccL, 0xde966292L,
     0x81b949d0L, 0x4c50901bL, 0x71c65614L, 0xe6c6c7bdL, 0x327a140aL,
     0x45e1d006L, 0xc3f27b9aL, 0xc9aa53fdL, 0x62a80f00L, 0xbb25bfe2L,
     0x35bdd2f6L, 0x71126905L, 0xb2040222L, 0xb6cbcf7cL, 0xcd769c2bL,
     0x53113ec0L, 0x1640e3d3L, 0x38abbd60L, 0x2547adf0L, 0xba38209cL,
     0xf746ce76L, 0x77afa1c5L, 0x20756060L, 0x85cbfe4eL, 0x8ae88dd8L,
     0x7aaaf9b0L, 0x4cf9aa7eL, 0x1948c25cL, 0x02fb8a8cL, 0x01c36ae4L,
     0xd6ebe1f9L, 0x90d4f869L, 0xa65cdea0L, 0x3f09252dL, 0xc208e69fL,
     0xb74e6132L, 0xce77e25bL, 0x578fdfe3L, 0x3ac372e6L,
    },
};

void BF_set_key(BF_KEY *key, size_t len, const uint8_t *data) {
  int i;
  uint32_t *p, ri, in[2];
  const uint8_t *d, *end;

  OPENSSL_memcpy(key, &bf_init, sizeof(BF_KEY));
  p = key->P;

  if (len > ((BF_ROUNDS + 2) * 4))
    len = (BF_ROUNDS + 2) * 4;

  d = data;
  end = &data[len];
  for (i = 0; i < BF_ROUNDS + 2; i++) {
    ri = *(d++);
    if (d >= end) {
      d = data;
    }

    ri <<= 8;
    ri |= *(d++);
    if (d >= end) {
      d = data;
    }

    ri <<= 8;
    ri |= *(d++);
    if (d >= end) {
      d = data;
    }

    ri <<= 8;
    ri |= *(d++);
    if (d >= end) {
      d = data;
    }

    p[i] ^= ri;
  }

  in[0] = 0L;
  in[1] = 0L;
  for (i = 0; i < BF_ROUNDS + 2; i += 2) {
    BF_encrypt(in, key);
    p[i] = in[0];
    p[i + 1] = in[1];
  }

  p = key->S;
  for (i = 0; i < 4 * 256; i += 2) {
    BF_encrypt(in, key);
    p[i] = in[0];
    p[i + 1] = in[1];
  }
}

static void BF_cfb64_encrypt(const uint8_t *in, uint8_t *out, size_t length,
                             const BF_KEY *schedule, uint8_t *ivec, int *num,
                             int encrypt) {
  uint32_t v0, v1, t;
  int n = *num;
  size_t l = length;
  uint32_t ti[2];
  uint8_t c, cc;

  uint8_t *iv = ivec;
  if (encrypt) {
    while (l--) {
      if (n == 0) {
        n2l(iv, v0);
        ti[0] = v0;
        n2l(iv, v1);
        ti[1] = v1;
        BF_encrypt(ti, schedule);
        iv = ivec;
        t = ti[0];
        l2n(t, iv);
        t = ti[1];
        l2n(t, iv);
        iv = ivec;
      }
      c = *(in++) ^ iv[n];
      *(out++) = c;
      iv[n] = c;
      n = (n + 1) & 0x07;
    }
  } else {
    while (l--) {
      if (n == 0) {
        n2l(iv, v0);
        ti[0] = v0;
        n2l(iv, v1);
        ti[1] = v1;
        BF_encrypt(ti, schedule);
        iv = ivec;
        t = ti[0];
        l2n(t, iv);
        t = ti[1];
        l2n(t, iv);
        iv = ivec;
      }
      cc = *(in++);
      c = iv[n];
      iv[n] = cc;
      *(out++) = c ^ cc;
      n = (n + 1) & 0x07;
    }
  }

  *num = n;
}

static int bf_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
                            const uint8_t *iv, int enc) {
  BF_KEY *bf_key = ctx->cipher_data;
  BF_set_key(bf_key, ctx->key_len, key);
  return 1;
}

static int bf_ecb_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
                         size_t len) {
  BF_KEY *bf_key = ctx->cipher_data;

  while (len >= BF_BLOCK) {
    BF_ecb_encrypt(in, out, bf_key, ctx->encrypt);
    in += BF_BLOCK;
    out += BF_BLOCK;
    len -= BF_BLOCK;
  }
  assert(len == 0);

  return 1;
}

static int bf_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
                         size_t len) {
  BF_KEY *bf_key = ctx->cipher_data;
  BF_cbc_encrypt(in, out, len, bf_key, ctx->iv, ctx->encrypt);
  return 1;
}

static int bf_cfb_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
                         size_t len) {
  BF_KEY *bf_key = ctx->cipher_data;
  int num = ctx->num;
  BF_cfb64_encrypt(in, out, len, bf_key, ctx->iv, &num, ctx->encrypt);
  ctx->num = num;
  return 1;
}

static const EVP_CIPHER bf_ecb = {
    NID_bf_ecb,          BF_BLOCK /* block_size */,
    16 /* key_size */,   BF_BLOCK /* iv_len */,
    sizeof(BF_KEY),      EVP_CIPH_ECB_MODE | EVP_CIPH_VARIABLE_LENGTH,
    NULL /* app_data */, bf_init_key,
    bf_ecb_cipher,       NULL /* cleanup */,
    NULL /* ctrl */,
};

static const EVP_CIPHER bf_cbc = {
    NID_bf_cbc,          BF_BLOCK /* block_size */,
    16 /* key_size */,   BF_BLOCK /* iv_len */,
    sizeof(BF_KEY),      EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH,
    NULL /* app_data */, bf_init_key,
    bf_cbc_cipher,       NULL /* cleanup */,
    NULL /* ctrl */,
};

static const EVP_CIPHER bf_cfb = {
    NID_bf_cfb64,        1 /* block_size */,
    16 /* key_size */,   BF_BLOCK /* iv_len */,
    sizeof(BF_KEY),      EVP_CIPH_CFB_MODE | EVP_CIPH_VARIABLE_LENGTH,
    NULL /* app_data */, bf_init_key,
    bf_cfb_cipher,       NULL /* cleanup */,
    NULL /* ctrl */,
};

const EVP_CIPHER *EVP_bf_ecb(void) { return &bf_ecb; }

const EVP_CIPHER *EVP_bf_cbc(void) { return &bf_cbc; }

const EVP_CIPHER *EVP_bf_cfb(void) { return &bf_cfb; }
