text: /*
   * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #include <openssl/crypto.h>
  #include "des_locl.h"
  #include "spr.h"
  
  void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
  {
      register DES_LONG l, r, t, u;
      register DES_LONG *s;
  
      r = data[0];
      l = data[1];
  
      IP(r, l);
      /*
       * Things have been modified so that the initial rotate is done outside
       * the loop.  This required the DES_SPtrans values in sp.h to be rotated
       * 1 bit to the right. One perl script later and things have a 5% speed
       * up on a sparc2. Thanks to Richard Outerbridge for pointing this out.
       */
      /* clear the top bits on machines with 8byte longs */
      /* shift left by 2 */
      r = ROTATE(r, 29) & 0xffffffffL;
      l = ROTATE(l, 29) & 0xffffffffL;
  
      s = ks->ks->deslong;
      /*
       * I don't know if it is worth the effort of loop unrolling the inner
       * loop
       */
      if (enc) {
          D_ENCRYPT(l, r, 0);     /* 1 */
          D_ENCRYPT(r, l, 2);     /* 2 */
          D_ENCRYPT(l, r, 4);     /* 3 */
          D_ENCRYPT(r, l, 6);     /* 4 */
          D_ENCRYPT(l, r, 8);     /* 5 */
          D_ENCRYPT(r, l, 10);    /* 6 */
          D_ENCRYPT(l, r, 12);    /* 7 */
          D_ENCRYPT(r, l, 14);    /* 8 */
          D_ENCRYPT(l, r, 16);    /* 9 */
          D_ENCRYPT(r, l, 18);    /* 10 */
          D_ENCRYPT(l, r, 20);    /* 11 */
          D_ENCRYPT(r, l, 22);    /* 12 */
          D_ENCRYPT(l, r, 24);    /* 13 */
          D_ENCRYPT(r, l, 26);    /* 14 */
          D_ENCRYPT(l, r, 28);    /* 15 */
          D_ENCRYPT(r, l, 30);    /* 16 */
      } else {
          D_ENCRYPT(l, r, 30);    /* 16 */
          D_ENCRYPT(r, l, 28);    /* 15 */
          D_ENCRYPT(l, r, 26);    /* 14 */
          D_ENCRYPT(r, l, 24);    /* 13 */
          D_ENCRYPT(l, r, 22);    /* 12 */
          D_ENCRYPT(r, l, 20);    /* 11 */
          D_ENCRYPT(l, r, 18);    /* 10 */
          D_ENCRYPT(r, l, 16);    /* 9 */
          D_ENCRYPT(l, r, 14);    /* 8 */
          D_ENCRYPT(r, l, 12);    /* 7 */
          D_ENCRYPT(l, r, 10);    /* 6 */
          D_ENCRYPT(r, l, 8);     /* 5 */
          D_ENCRYPT(l, r, 6);     /* 4 */
          D_ENCRYPT(r, l, 4);     /* 3 */
          D_ENCRYPT(l, r, 2);     /* 2 */
          D_ENCRYPT(r, l, 0);     /* 1 */
      }
  
      /* rotate and clear the top bits on machines with 8byte longs */
      l = ROTATE(l, 3) & 0xffffffffL;
      r = ROTATE(r, 3) & 0xffffffffL;
  
      FP(r, l);
      data[0] = l;
      data[1] = r;
      l = r = t = u = 0;
  }
  
  void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
  {
      register DES_LONG l, r, t, u;
      register DES_LONG *s;
  
      r = data[0];
      l = data[1];
  
      /*
       * Things have been modified so that the initial rotate is done outside
       * the loop.  This required the DES_SPtrans values in sp.h to be rotated
       * 1 bit to the right. One perl script later and things have a 5% speed
       * up on a sparc2. Thanks to Richard Outerbridge for pointing this out.
       */
      /* clear the top bits on machines with 8byte longs */
      r = ROTATE(r, 29) & 0xffffffffL;
      l = ROTATE(l, 29) & 0xffffffffL;
  
      s = ks->ks->deslong;
      /*
       * I don't know if it is worth the effort of loop unrolling the inner
       * loop
       */
      if (enc) {
          D_ENCRYPT(l, r, 0);     /* 1 */
          D_ENCRYPT(r, l, 2);     /* 2 */
          D_ENCRYPT(l, r, 4);     /* 3 */
          D_ENCRYPT(r, l, 6);     /* 4 */
          D_ENCRYPT(l, r, 8);     /* 5 */
          D_ENCRYPT(r, l, 10);    /* 6 */
          D_ENCRYPT(l, r, 12);    /* 7 */
          D_ENCRYPT(r, l, 14);    /* 8 */
          D_ENCRYPT(l, r, 16);    /* 9 */
          D_ENCRYPT(r, l, 18);    /* 10 */
          D_ENCRYPT(l, r, 20);    /* 11 */
          D_ENCRYPT(r, l, 22);    /* 12 */
          D_ENCRYPT(l, r, 24);    /* 13 */
          D_ENCRYPT(r, l, 26);    /* 14 */
          D_ENCRYPT(l, r, 28);    /* 15 */
          D_ENCRYPT(r, l, 30);    /* 16 */
      } else {
          D_ENCRYPT(l, r, 30);    /* 16 */
          D_ENCRYPT(r, l, 28);    /* 15 */
          D_ENCRYPT(l, r, 26);    /* 14 */
          D_ENCRYPT(r, l, 24);    /* 13 */
          D_ENCRYPT(l, r, 22);    /* 12 */
          D_ENCRYPT(r, l, 20);    /* 11 */
          D_ENCRYPT(l, r, 18);    /* 10 */
          D_ENCRYPT(r, l, 16);    /* 9 */
          D_ENCRYPT(l, r, 14);    /* 8 */
          D_ENCRYPT(r, l, 12);    /* 7 */
          D_ENCRYPT(l, r, 10);    /* 6 */
          D_ENCRYPT(r, l, 8);     /* 5 */
          D_ENCRYPT(l, r, 6);     /* 4 */
          D_ENCRYPT(r, l, 4);     /* 3 */
          D_ENCRYPT(l, r, 2);     /* 2 */
          D_ENCRYPT(r, l, 0);     /* 1 */
      }
      /* rotate and clear the top bits on machines with 8byte longs */
      data[0] = ROTATE(l, 3) & 0xffffffffL;
      data[1] = ROTATE(r, 3) & 0xffffffffL;
      l = r = t = u = 0;
  }
  
  void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1,
                    DES_key_schedule *ks2, DES_key_schedule *ks3)
  {
      register DES_LONG l, r;
  
      l = data[0];
      r = data[1];
      IP(l, r);
      data[0] = l;
      data[1] = r;
      DES_encrypt2((DES_LONG *)data, ks1, DES_ENCRYPT);
      DES_encrypt2((DES_LONG *)data, ks2, DES_DECRYPT);
      DES_encrypt2((DES_LONG *)data, ks3, DES_ENCRYPT);
      l = data[0];
      r = data[1];
      FP(r, l);
      data[0] = l;
      data[1] = r;
  }
  
  void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1,
                    DES_key_schedule *ks2, DES_key_schedule *ks3)
  {
      register DES_LONG l, r;
  
      l = data[0];
      r = data[1];
      IP(l, r);
      data[0] = l;
      data[1] = r;
      DES_encrypt2((DES_LONG *)data, ks3, DES_DECRYPT);
      DES_encrypt2((DES_LONG *)data, ks2, DES_ENCRYPT);
      DES_encrypt2((DES_LONG *)data, ks1, DES_DECRYPT);
      l = data[0];
      r = data[1];
      FP(r, l);
      data[0] = l;
      data[1] = r;
  }
  
  #ifndef DES_DEFAULT_OPTIONS
  
  # undef CBC_ENC_C__DONT_UPDATE_IV
  # include "ncbc_enc.h"          /* DES_ncbc_encrypt */
  
  void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
                            long length, DES_key_schedule *ks1,
                            DES_key_schedule *ks2, DES_key_schedule *ks3,
                            DES_cblock *ivec, int enc)
  {
      register DES_LONG tin0, tin1;
      register DES_LONG tout0, tout1, xor0, xor1;
      register const unsigned char *in;
      unsigned char *out;
      register long l = length;
      DES_LONG tin[2];
      unsigned char *iv;
  
      in = input;
      out = output;
      iv = &(*ivec)[0];
  
      if (enc) {
          c2l(iv, tout0);
          c2l(iv, tout1);
          for (l -= 8; l >= 0; l -= 8) {
              c2l(in, tin0);
              c2l(in, tin1);
              tin0 ^= tout0;
              tin1 ^= tout1;
  
              tin[0] = tin0;
              tin[1] = tin1;
              DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3);
              tout0 = tin[0];
              tout1 = tin[1];
  
              l2c(tout0, out);
              l2c(tout1, out);
          }
          if (l != -8) {
              c2ln(in, tin0, tin1, l + 8);
              tin0 ^= tout0;
              tin1 ^= tout1;
  
              tin[0] = tin0;
              tin[1] = tin1;
              DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3);
              tout0 = tin[0];
              tout1 = tin[1];
  
              l2c(tout0, out);
              l2c(tout1, out);
          }
          iv = &(*ivec)[0];
          l2c(tout0, iv);
          l2c(tout1, iv);
      } else {
          register DES_LONG t0, t1;
  
          c2l(iv, xor0);
          c2l(iv, xor1);
          for (l -= 8; l >= 0; l -= 8) {
              c2l(in, tin0);
              c2l(in, tin1);
  
              t0 = tin0;
              t1 = tin1;
  
              tin[0] = tin0;
              tin[1] = tin1;
              DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3);
              tout0 = tin[0];
              tout1 = tin[1];
  
              tout0 ^= xor0;
              tout1 ^= xor1;
              l2c(tout0, out);
              l2c(tout1, out);
              xor0 = t0;
              xor1 = t1;
          }
          if (l != -8) {
              c2l(in, tin0);
              c2l(in, tin1);
  
              t0 = tin0;
              t1 = tin1;
  
              tin[0] = tin0;
              tin[1] = tin1;
              DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3);
              tout0 = tin[0];
              tout1 = tin[1];
  
              tout0 ^= xor0;
              tout1 ^= xor1;
              l2cn(tout0, tout1, out, l + 8);
              xor0 = t0;
              xor1 = t1;
          }
  
          iv = &(*ivec)[0];
          l2c(xor0, iv);
          l2c(xor1, iv);
      }
      tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
      tin[0] = tin[1] = 0;
  }
  
  #endif                          /* DES_DEFAULT_OPTIONS */
  