/* ripemd160-compress.c

   RIPE-MD160 (Transform function)

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

   This file is part of GNU Nettle.

   GNU Nettle is free software: you can redistribute it and/or
   modify it under the terms of either:

     * the GNU Lesser General Public License as published by the Free
       Software Foundation; either version 3 of the License, or (at your
       option) any later version.

   or

     * the GNU General Public License as published by the Free
       Software Foundation; either version 2 of the License, or (at your
       option) any later version.

   or both in parallel, as here.

   GNU Nettle 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
   General Public License for more details.

   You should have received copies of the GNU General Public License and
   the GNU Lesser General Public License along with this program.  If
   not, see http://www.gnu.org/licenses/.
*/

/* Ported from libgcrypt by Andres Mejia <[email protected]> */

#if HAVE_CONFIG_H
# include "config.h"
#endif

#include <string.h>

#include "ripemd160.h"
#include "ripemd160-internal.h"

#include "macros.h"


/****************
 * Transform the message X which consists of 16 32-bit-words
 */
void
_nettle_ripemd160_compress(uint32_t *state, const uint8_t *data)
{
  register uint32_t a,b,c,d,e;
  uint32_t aa,bb,cc,dd,ee,t;
  uint32_t x[16];

#ifdef WORDS_BIGENDIAN
  {
    int i;
    for (i=0; i < 16; i++, data += 4 )
      x[i] = LE_READ_UINT32(data);
  }
#else
  /* memcpy seems a bit faster. Benchmarked on Intel SU4100, it makes
     the entire update function roughly 6% faster. */
  memcpy(x, data, sizeof(x));
#endif


#define K0  0x00000000
#define K1  0x5A827999
#define K2  0x6ED9EBA1
#define K3  0x8F1BBCDC
#define K4  0xA953FD4E
#define KK0 0x50A28BE6
#define KK1 0x5C4DD124
#define KK2 0x6D703EF3
#define KK3 0x7A6D76E9
#define KK4 0x00000000
#define F0(x,y,z)   ( (x) ^ (y) ^ (z) )
#define F1(x,y,z)   ( ((x) & (y)) | (~(x) & (z)) )
#define F2(x,y,z)   ( ((x) | ~(y)) ^ (z) )
#define F3(x,y,z)   ( ((x) & (z)) | ((y) & ~(z)) )
#define F4(x,y,z)   ( (x) ^ ((y) | ~(z)) )
#define R(a,b,c,d,e,f,k,r,s) do { t = a + f(b,c,d) + k + x[r]; \
          a = ROTL32(s,t) + e;        \
          c = ROTL32(10,c);         \
        } while(0)

  /* left lane */
  a = state[0];
  b = state[1];
  c = state[2];
  d = state[3];
  e = state[4];
  R( a, b, c, d, e, F0, K0,  0, 11 );
  R( e, a, b, c, d, F0, K0,  1, 14 );
  R( d, e, a, b, c, F0, K0,  2, 15 );
  R( c, d, e, a, b, F0, K0,  3, 12 );
  R( b, c, d, e, a, F0, K0,  4,  5 );
  R( a, b, c, d, e, F0, K0,  5,  8 );
  R( e, a, b, c, d, F0, K0,  6,  7 );
  R( d, e, a, b, c, F0, K0,  7,  9 );
  R( c, d, e, a, b, F0, K0,  8, 11 );
  R( b, c, d, e, a, F0, K0,  9, 13 );
  R( a, b, c, d, e, F0, K0, 10, 14 );
  R( e, a, b, c, d, F0, K0, 11, 15 );
  R( d, e, a, b, c, F0, K0, 12,  6 );
  R( c, d, e, a, b, F0, K0, 13,  7 );
  R( b, c, d, e, a, F0, K0, 14,  9 );
  R( a, b, c, d, e, F0, K0, 15,  8 );
  R( e, a, b, c, d, F1, K1,  7,  7 );
  R( d, e, a, b, c, F1, K1,  4,  6 );
  R( c, d, e, a, b, F1, K1, 13,  8 );
  R( b, c, d, e, a, F1, K1,  1, 13 );
  R( a, b, c, d, e, F1, K1, 10, 11 );
  R( e, a, b, c, d, F1, K1,  6,  9 );
  R( d, e, a, b, c, F1, K1, 15,  7 );
  R( c, d, e, a, b, F1, K1,  3, 15 );
  R( b, c, d, e, a, F1, K1, 12,  7 );
  R( a, b, c, d, e, F1, K1,  0, 12 );
  R( e, a, b, c, d, F1, K1,  9, 15 );
  R( d, e, a, b, c, F1, K1,  5,  9 );
  R( c, d, e, a, b, F1, K1,  2, 11 );
  R( b, c, d, e, a, F1, K1, 14,  7 );
  R( a, b, c, d, e, F1, K1, 11, 13 );
  R( e, a, b, c, d, F1, K1,  8, 12 );
  R( d, e, a, b, c, F2, K2,  3, 11 );
  R( c, d, e, a, b, F2, K2, 10, 13 );
  R( b, c, d, e, a, F2, K2, 14,  6 );
  R( a, b, c, d, e, F2, K2,  4,  7 );
  R( e, a, b, c, d, F2, K2,  9, 14 );
  R( d, e, a, b, c, F2, K2, 15,  9 );
  R( c, d, e, a, b, F2, K2,  8, 13 );
  R( b, c, d, e, a, F2, K2,  1, 15 );
  R( a, b, c, d, e, F2, K2,  2, 14 );
  R( e, a, b, c, d, F2, K2,  7,  8 );
  R( d, e, a, b, c, F2, K2,  0, 13 );
  R( c, d, e, a, b, F2, K2,  6,  6 );
  R( b, c, d, e, a, F2, K2, 13,  5 );
  R( a, b, c, d, e, F2, K2, 11, 12 );
  R( e, a, b, c, d, F2, K2,  5,  7 );
  R( d, e, a, b, c, F2, K2, 12,  5 );
  R( c, d, e, a, b, F3, K3,  1, 11 );
  R( b, c, d, e, a, F3, K3,  9, 12 );
  R( a, b, c, d, e, F3, K3, 11, 14 );
  R( e, a, b, c, d, F3, K3, 10, 15 );
  R( d, e, a, b, c, F3, K3,  0, 14 );
  R( c, d, e, a, b, F3, K3,  8, 15 );
  R( b, c, d, e, a, F3, K3, 12,  9 );
  R( a, b, c, d, e, F3, K3,  4,  8 );
  R( e, a, b, c, d, F3, K3, 13,  9 );
  R( d, e, a, b, c, F3, K3,  3, 14 );
  R( c, d, e, a, b, F3, K3,  7,  5 );
  R( b, c, d, e, a, F3, K3, 15,  6 );
  R( a, b, c, d, e, F3, K3, 14,  8 );
  R( e, a, b, c, d, F3, K3,  5,  6 );
  R( d, e, a, b, c, F3, K3,  6,  5 );
  R( c, d, e, a, b, F3, K3,  2, 12 );
  R( b, c, d, e, a, F4, K4,  4,  9 );
  R( a, b, c, d, e, F4, K4,  0, 15 );
  R( e, a, b, c, d, F4, K4,  5,  5 );
  R( d, e, a, b, c, F4, K4,  9, 11 );
  R( c, d, e, a, b, F4, K4,  7,  6 );
  R( b, c, d, e, a, F4, K4, 12,  8 );
  R( a, b, c, d, e, F4, K4,  2, 13 );
  R( e, a, b, c, d, F4, K4, 10, 12 );
  R( d, e, a, b, c, F4, K4, 14,  5 );
  R( c, d, e, a, b, F4, K4,  1, 12 );
  R( b, c, d, e, a, F4, K4,  3, 13 );
  R( a, b, c, d, e, F4, K4,  8, 14 );
  R( e, a, b, c, d, F4, K4, 11, 11 );
  R( d, e, a, b, c, F4, K4,  6,  8 );
  R( c, d, e, a, b, F4, K4, 15,  5 );
  R( b, c, d, e, a, F4, K4, 13,  6 );

  aa = a; bb = b; cc = c; dd = d; ee = e;

  /* right lane */
  a = state[0];
  b = state[1];
  c = state[2];
  d = state[3];
  e = state[4];
  R( a, b, c, d, e, F4, KK0,  5,  8);
  R( e, a, b, c, d, F4, KK0, 14,  9);
  R( d, e, a, b, c, F4, KK0,  7,  9);
  R( c, d, e, a, b, F4, KK0,  0, 11);
  R( b, c, d, e, a, F4, KK0,  9, 13);
  R( a, b, c, d, e, F4, KK0,  2, 15);
  R( e, a, b, c, d, F4, KK0, 11, 15);
  R( d, e, a, b, c, F4, KK0,  4,  5);
  R( c, d, e, a, b, F4, KK0, 13,  7);
  R( b, c, d, e, a, F4, KK0,  6,  7);
  R( a, b, c, d, e, F4, KK0, 15,  8);
  R( e, a, b, c, d, F4, KK0,  8, 11);
  R( d, e, a, b, c, F4, KK0,  1, 14);
  R( c, d, e, a, b, F4, KK0, 10, 14);
  R( b, c, d, e, a, F4, KK0,  3, 12);
  R( a, b, c, d, e, F4, KK0, 12,  6);
  R( e, a, b, c, d, F3, KK1,  6,  9);
  R( d, e, a, b, c, F3, KK1, 11, 13);
  R( c, d, e, a, b, F3, KK1,  3, 15);
  R( b, c, d, e, a, F3, KK1,  7,  7);
  R( a, b, c, d, e, F3, KK1,  0, 12);
  R( e, a, b, c, d, F3, KK1, 13,  8);
  R( d, e, a, b, c, F3, KK1,  5,  9);
  R( c, d, e, a, b, F3, KK1, 10, 11);
  R( b, c, d, e, a, F3, KK1, 14,  7);
  R( a, b, c, d, e, F3, KK1, 15,  7);
  R( e, a, b, c, d, F3, KK1,  8, 12);
  R( d, e, a, b, c, F3, KK1, 12,  7);
  R( c, d, e, a, b, F3, KK1,  4,  6);
  R( b, c, d, e, a, F3, KK1,  9, 15);
  R( a, b, c, d, e, F3, KK1,  1, 13);
  R( e, a, b, c, d, F3, KK1,  2, 11);
  R( d, e, a, b, c, F2, KK2, 15,  9);
  R( c, d, e, a, b, F2, KK2,  5,  7);
  R( b, c, d, e, a, F2, KK2,  1, 15);
  R( a, b, c, d, e, F2, KK2,  3, 11);
  R( e, a, b, c, d, F2, KK2,  7,  8);
  R( d, e, a, b, c, F2, KK2, 14,  6);
  R( c, d, e, a, b, F2, KK2,  6,  6);
  R( b, c, d, e, a, F2, KK2,  9, 14);
  R( a, b, c, d, e, F2, KK2, 11, 12);
  R( e, a, b, c, d, F2, KK2,  8, 13);
  R( d, e, a, b, c, F2, KK2, 12,  5);
  R( c, d, e, a, b, F2, KK2,  2, 14);
  R( b, c, d, e, a, F2, KK2, 10, 13);
  R( a, b, c, d, e, F2, KK2,  0, 13);
  R( e, a, b, c, d, F2, KK2,  4,  7);
  R( d, e, a, b, c, F2, KK2, 13,  5);
  R( c, d, e, a, b, F1, KK3,  8, 15);
  R( b, c, d, e, a, F1, KK3,  6,  5);
  R( a, b, c, d, e, F1, KK3,  4,  8);
  R( e, a, b, c, d, F1, KK3,  1, 11);
  R( d, e, a, b, c, F1, KK3,  3, 14);
  R( c, d, e, a, b, F1, KK3, 11, 14);
  R( b, c, d, e, a, F1, KK3, 15,  6);
  R( a, b, c, d, e, F1, KK3,  0, 14);
  R( e, a, b, c, d, F1, KK3,  5,  6);
  R( d, e, a, b, c, F1, KK3, 12,  9);
  R( c, d, e, a, b, F1, KK3,  2, 12);
  R( b, c, d, e, a, F1, KK3, 13,  9);
  R( a, b, c, d, e, F1, KK3,  9, 12);
  R( e, a, b, c, d, F1, KK3,  7,  5);
  R( d, e, a, b, c, F1, KK3, 10, 15);
  R( c, d, e, a, b, F1, KK3, 14,  8);
  R( b, c, d, e, a, F0, KK4, 12,  8);
  R( a, b, c, d, e, F0, KK4, 15,  5);
  R( e, a, b, c, d, F0, KK4, 10, 12);
  R( d, e, a, b, c, F0, KK4,  4,  9);
  R( c, d, e, a, b, F0, KK4,  1, 12);
  R( b, c, d, e, a, F0, KK4,  5,  5);
  R( a, b, c, d, e, F0, KK4,  8, 14);
  R( e, a, b, c, d, F0, KK4,  7,  6);
  R( d, e, a, b, c, F0, KK4,  6,  8);
  R( c, d, e, a, b, F0, KK4,  2, 13);
  R( b, c, d, e, a, F0, KK4, 13,  6);
  R( a, b, c, d, e, F0, KK4, 14,  5);
  R( e, a, b, c, d, F0, KK4,  0, 15);
  R( d, e, a, b, c, F0, KK4,  3, 13);
  R( c, d, e, a, b, F0, KK4,  9, 11);
  R( b, c, d, e, a, F0, KK4, 11, 11);


  t    = state[1] + d + cc;
  state[1] = state[2] + e + dd;
  state[2] = state[3] + a + ee;
  state[3] = state[4] + b + aa;
  state[4] = state[0] + c + bb;
  state[0] = t;
}