[u/mdw/catacomb] / blkc.h

/* -*-c-*-
 *
 * $Id$
 *
 * Common definitions for block ciphers
 *
 * (c) 1999 Straylight/Edgeware
 */

/*----- Licensing notice --------------------------------------------------*
 *
 * This file is part of Catacomb.
 *
 * Catacomb is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * Catacomb 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 Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with Catacomb; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 */

#ifndef CATACOMB_BLKC_H
#define CATACOMB_BLKC_H

#ifdef __cplusplus
  extern "C" {
#endif

/*----- Header files ------------------------------------------------------*/

#include <assert.h>

#include <mLib/bits.h>

/*----- Theory of operation -----------------------------------------------*
 *
 * A block cipher has associated with it a triple, called PRE_CLASS, of the
 * form `(TYPE, ENDIAN, BITS)', where TYPE is either `N' (representing an
 * implemented bit size) or `X' (representing an unimplemented bit size,
 * causing loops to be compiled rather than unrolled code), ENDIAN is `B'
 * (big) or `L' (little), and BITS is the block size of the cipher in bits.
 */

/*----- Data movement macros ----------------------------------------------*/

/*
 * `The C preprocessor.  You will never find a more wretched hive of bogus
 * hackery.  We must be cautious.'
 */

/* --- General dispatch macros --- */

#define BLKC_DOGLUE(x, y) x ## y
#define BLKC_GLUE(x, y) BLKC_DOGLUE(x, y)
#define BLKC_APPLY(f, x) f x
#define BLKC_FIRST(x, y, z) x
#define BLKC_SECOND(x, y, z) y
#define BLKC_THIRD(x, y, z) z
#define BLKC_TYPE(PRE) BLKC_APPLY(BLKC_FIRST, PRE##_CLASS)
#define BLKC_ENDIAN(PRE) BLKC_APPLY(BLKC_SECOND, PRE##_CLASS)
#define BLKC_BITS(PRE) BLKC_APPLY(BLKC_THIRD, PRE##_CLASS)

#define BLKC_STORE_E(PRE) BLKC_GLUE(STORE32_, BLKC_ENDIAN(PRE))
#define BLKC_LOAD_E(PRE) BLKC_GLUE(LOAD32_, BLKC_ENDIAN(PRE))

/* --- Interface macros --- */

#define BLKC_STORE(PRE, b, w)						\
  BLKC_GLUE(BLKC_STORE_, BLKC_TYPE(PRE))				\
    (PRE, b, w, BLKC_STORE_E(PRE), BLKC_BITS(PRE))

#define BLKC_XSTORE(PRE, b, w, wx)					\
  BLKC_GLUE(BLKC_XSTORE_, BLKC_TYPE(PRE))				\
    (PRE, b, w, wx, BLKC_STORE_E(PRE), BLKC_BITS(PRE))

#define BLKC_LOAD(PRE, w, b)						\
  BLKC_GLUE(BLKC_LOAD_, BLKC_TYPE(PRE))					\
    (PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE))

#define BLKC_XLOAD(PRE, w, b)						\
  BLKC_GLUE(BLKC_XLOAD_, BLKC_TYPE(PRE))				\
    (PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE))

#define BLKC_MOVE(PRE, w, wx)						\
  BLKC_GLUE(BLKC_MOVE_, BLKC_TYPE(PRE))					\
    (PRE, w, wx, BLKC_BITS(PRE))

#define BLKC_XMOVE(PRE, w, wx)						\
  BLKC_GLUE(BLKC_XMOVE_, BLKC_TYPE(PRE))				\
    (PRE, w, wx, BLKC_BITS(PRE))

#define BLKC_STEP(PRE, w)						\
  BLKC_GLUE(BLKC_STEP_X_, BLKC_ENDIAN(PRE))				\
    (PRE, w)

#define BLKC_ZERO(PRE, w)						\
  BLKC_GLUE(BLKC_ZERO_, BLKC_TYPE(PRE))					\
    (PRE, w, BLKC_BITS(PRE))

#define BLKC_SET(PRE, w, x)						\
  BLKC_GLUE(BLKC_SET_X_, BLKC_ENDIAN(PRE))				\
    (PRE, w, x)

#define BLKC_SHOW(PRE, tag, w) do {					\
  fputs(tag ": ", stdout);						\
  BLKC_SKEL_X(PRE, BLKC_W(w);, printf("%08x ", *_w++););		\
  fputc('\n', stdout);							\
} while (0)

/* --- General implementation skeleton --- */

#define BLKC_SKEL(PRE, decl, guts) do {					\
  decl									\
  guts									\
} while (0)

#define BLKC_P(p) register octet *_p = (octet *)(p)
#define BLKC_W(w) register uint32 *_w = (w)
#define BLKC_WX(wx) register uint32 *_wx = (wx)

/* --- Implementation for unusual block sizes --- */

#define BLKC_SKEL_X(PRE, decl, guts)					\
  BLKC_SKEL(PRE, unsigned _i; decl,					\
	    for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) {			\
	      guts							\
	    })

#define BLKC_STORE_X(PRE, b, w, op, n)					\
  BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w);,				\
	      op(_p, *_w); _p += 4; _w++; )

#define BLKC_XSTORE_X(PRE, b, w, wx, op, n)				\
  BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);,	\
	      op(_p, *_w ^ *_wx); _p += 4; _w++; _wx++; )

#define BLKC_LOAD_X(PRE, w, b, op, n)					\
  BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);,				\
	      *_w = op(_p); _p += 4; _w++; )

#define BLKC_XLOAD_X(PRE, w, b, op, n)					\
  BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);,				\
	      *_w ^= op(_p); _p += 4; _w++; )

#define BLKC_MOVE_X(PRE, w, wx, n)					\
  BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);,			\
	      *_w = *_wx; _w++; _wx++; )				\

#define BLKC_XMOVE_X(PRE, w, wx, n)					\
  BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);,			\
	      *_w ^= *_wx; _w++; _wx++; )				\

#define BLKC_ZERO_X(PRE, w, n)						\
  BLKC_SKEL_X(PRE, BLKC_W(w);, *_w++ = 0;)

#define BLKC_STEP_X_B(PRE, w) do {					\
  unsigned _i = PRE##_BLKSZ / 4; BLKC_W(w); uint32 _x = 0;		\
  while (_i && !_x) { _i--; _w[_i] = _x = U32(_w[_i] + 1); }		\
} while (0)

#define BLKC_STEP_X_L(PRE, w) do {					\
  unsigned _i = 0; BLKC_W(w); uint32 _x = 0;				\
  while (_i < PRE##_BLKSZ / 4 && !_x)					\
    { _w[_i] = _x = U32(_w[_i] + 1); _i++; }				\
} while (0)

#define BLKC_SET_X_B(PRE, w, x) do {					\
  unsigned _i; BLKC_W(w); unsigned long _x = x;				\
  for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) {				\
    *_w++ = U32(_x);							\
    _x = ((_x & ~MASK32) >> 16) >> 16;					\
  }									\
} while (0)

#define BLKC_SET_X_L(PRE, w, x) do {					\
  unsigned _i; BLKC_W(w); unsigned long _x = x;	_w += PRE##_BLKSZ / 4;	\
  for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) {				\
    *--_w = U32(_x);							\
    _x = ((_x & ~MASK32) >> 16) >> 16;					\
  }									\
} while (0)

/* --- Implementation for known block sizes --- */

#define BLKC_SKEL_64(PRE, decl, op, guts)				\
  BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1);)

#define BLKC_SKEL_96(PRE, decl, op, guts)				\
  BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1); guts(op, 2);)

#define BLKC_SKEL_128(PRE, decl, op, guts)				\
  BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3);)

#define BLKC_SKEL_192(PRE, decl, op, guts)				\
  BLKC_SKEL(PRE, decl,							\
	    guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3);		\
	    guts(op, 4); guts(op, 5);)

#define BLKC_SKEL_256(PRE, decl, op, guts)				\
  BLKC_SKEL(PRE, decl,							\
	    guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3);		\
	    guts(op, 4); guts(op, 5); guts(op, 6); guts(op, 7);)

#define BLKC_STORE_GUTS(op, i) op(_p + 4 * i, _w[i])
#define BLKC_XSTORE_GUTS(op, i) op(_p + 4 * i, _w[i] ^ _wx[i])
#define BLKC_LOAD_GUTS(op, i) _w[i] = op(_p + 4 * i)
#define BLKC_XLOAD_GUTS(op, i) _w[i] ^= op(_p + 4 * i)
#define BLKC_MOVE_GUTS(op, i) _w[i] = _wx[i]
#define BLKC_XMOVE_GUTS(op, i) _w[i] ^= _wx[i]
#define BLKC_ZERO_GUTS(op, i) _w[i] = 0

#define BLKC_STORE_N(PRE, b, w, op, n)					\
  BLKC_GLUE(BLKC_SKEL_, n)						\
    (PRE, BLKC_P(b); const BLKC_W(w);, op, BLKC_STORE_GUTS)

#define BLKC_XSTORE_N(PRE, b, w, wx, op, n)				\
  BLKC_GLUE(BLKC_SKEL_, n)						\
    (PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);,		\
     op, BLKC_XSTORE_GUTS)

#define BLKC_LOAD_N(PRE, w, b, op, n)					\
  BLKC_GLUE(BLKC_SKEL_, n)						\
    (PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_LOAD_GUTS)

#define BLKC_XLOAD_N(PRE, w, b, op, n)					\
  BLKC_GLUE(BLKC_SKEL_, n)						\
    (PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_XLOAD_GUTS)

#define BLKC_MOVE_N(PRE, w, wx, n)					\
  BLKC_GLUE(BLKC_SKEL_, n)						\
    (PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_MOVE_GUTS)

#define BLKC_ZERO_N(PRE, w, n)						\
  BLKC_GLUE(BLKC_SKEL_, n)						\
    (PRE, BLKC_W(w); , op, BLKC_ZERO_GUTS)

#define BLKC_XMOVE_N(PRE, w, wx, n)					\
  BLKC_GLUE(BLKC_SKEL_, n)						\
    (PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_XMOVE_GUTS)

/*----- Test rig for block ciphers ----------------------------------------*/

/* --- @BLKC_TEST@ --- *
 *
 * Arguments:	@PRE@, @pre@ = prefixes for cipher-specific definitions
 *
 * Use:		Standard test rig for block ciphers.
 */

#ifdef TEST_RIG

#include <string.h>

#include <mLib/quis.h>
#include <mLib/testrig.h>

#define BLKC_VERIFY(PRE, pre)						\
									\
static int pre##_verify(dstr *v)					\
{									\
  pre##_ctx k;								\
  uint32 p[PRE##_BLKSZ / 4];						\
  uint32 c[PRE##_BLKSZ / 4];						\
  uint32 d[PRE##_BLKSZ / 4];						\
  dstr b = DSTR_INIT;							\
  int ok = 1;								\
									\
  /* --- Initialize the key buffer --- */				\
									\
  dstr_ensure(&b, PRE##_BLKSZ);						\
  b.len = PRE##_BLKSZ;							\
  pre##_init(&k, v[0].buf, v[0].len);					\
  BLKC_LOAD(PRE, p, v[1].buf);						\
  BLKC_LOAD(PRE, c, v[2].buf);						\
									\
  /* --- Test encryption --- */						\
									\
  BLKC_MOVE(PRE, d, p);							\
  pre##_eblk(&k, d, d);							\
  BLKC_STORE(PRE, b.buf, d);						\
  if (memcmp(b.buf, v[2].buf, PRE##_BLKSZ)) {				\
    ok = 0;								\
    printf("\nfail encryption:"						\
	   "\n\tkey	   = ");					\
    type_hex.dump(&v[0], stdout);					\
    printf("\n\tplaintext  = "); type_hex.dump(&v[1], stdout);		\
    printf("\n\texpected   = "); type_hex.dump(&v[2], stdout);		\
    printf("\n\tcalculated = "); type_hex.dump(&b, stdout);		\
    putchar('\n');							\
  }									\
									\
  /* --- Test decryption --- */						\
									\
  BLKC_MOVE(PRE, d, c);							\
  pre##_dblk(&k, d, d);							\
  BLKC_STORE(PRE, b.buf, d);						\
  if (memcmp(b.buf, v[1].buf, PRE##_BLKSZ)) {				\
    ok = 0;								\
    printf("\nfail decryption:"						\
	   "\n\tkey	   = ");					\
    type_hex.dump(&v[0], stdout);					\
    printf("\n\tciphertext = "); type_hex.dump(&v[2], stdout);		\
    printf("\n\texpected   = "); type_hex.dump(&v[1], stdout);		\
    printf("\n\tcalculated = "); type_hex.dump(&b, stdout);		\
    putchar('\n');							\
  }									\
									\
  /* --- Return --- */							\
									\
  return (ok);								\
}

#define BLKC_TEST(PRE, pre)						\
									\
BLKC_VERIFY(PRE, pre)							\
									\
static const test_chunk defs[] = {					\
  { #pre, pre##_verify, { &type_hex, &type_hex, &type_hex, 0 } },	\
  { 0, 0, { 0 } }							\
};									\
									\
int main(int argc, char *argv[])					\
{									\
  test_run(argc, argv, defs, SRCDIR"/tests/" #pre);			\
  return (0);								\
}

#else
#  define BLKC_VERIFY(PRE, pre)
#  define BLKC_TEST(PRE, pre)
#endif

/*----- That's all, folks -------------------------------------------------*/

#ifdef __cplusplus
  }
#endif

#endif
Commit	Line	Data
d03ab969	1	/* --c--
d03ab969	2	*
f94b972d	3	* $Id$
d03ab969	4	*
	5	* Common definitions for block ciphers
	6	*
	7	* (c) 1999 Straylight/Edgeware
	8	*/
	9
45c0fd36	10	/----- Licensing notice --------------------------------------------------
d03ab969	11	*
	12	* This file is part of Catacomb.
	13	*
	14	* Catacomb is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU Library General Public License as
	16	* published by the Free Software Foundation; either version 2 of the
	17	* License, or (at your option) any later version.
45c0fd36	18	*
d03ab969	19	* Catacomb is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU Library General Public License for more details.
45c0fd36	23	*
d03ab969	24	* You should have received a copy of the GNU Library General Public
	25	* License along with Catacomb; if not, write to the Free
	26	* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
	27	* MA 02111-1307, USA.
	28	*/
	29
b3f05084	30	#ifndef CATACOMB_BLKC_H
b3f05084	31	#define CATACOMB_BLKC_H
d03ab969	32
	33	#ifdef __cplusplus
	34	extern "C" {
	35	#endif
	36
	37	/----- Header files ------------------------------------------------------/
	38
c5885da8	39	#include <assert.h>
c5885da8	40
d03ab969	41	#include <mLib/bits.h>
	42
	43	/----- Theory of operation -----------------------------------------------
	44	*
	45	* A block cipher has associated with it a triple, called PRE_CLASS, of the
	46	* form `(TYPE, ENDIAN, BITS)', where TYPE is either `N' (representing an
	47	* implemented bit size) or `X' (representing an unimplemented bit size,
	48	* causing loops to be compiled rather than unrolled code), ENDIAN is `B'
	49	* (big) or `L' (little), and BITS is the block size of the cipher in bits.
	50	*/
	51
	52	/----- Data movement macros ----------------------------------------------/
	53
	54	/*
	55	* `The C preprocessor. You will never find a more wretched hive of bogus
	56	* hackery. We must be cautious.'
	57	*/
	58
	59	/* --- General dispatch macros --- */
	60
	61	#define BLKC_DOGLUE(x, y) x ## y
	62	#define BLKC_GLUE(x, y) BLKC_DOGLUE(x, y)
	63	#define BLKC_APPLY(f, x) f x
	64	#define BLKC_FIRST(x, y, z) x
	65	#define BLKC_SECOND(x, y, z) y
	66	#define BLKC_THIRD(x, y, z) z
b3f05084	67	#define BLKC_TYPE(PRE) BLKC_APPLY(BLKC_FIRST, PRE##_CLASS)
	68	#define BLKC_ENDIAN(PRE) BLKC_APPLY(BLKC_SECOND, PRE##_CLASS)
	69	#define BLKC_BITS(PRE) BLKC_APPLY(BLKC_THIRD, PRE##_CLASS)
d03ab969	70
	71	#define BLKC_STORE_E(PRE) BLKC_GLUE(STORE32_, BLKC_ENDIAN(PRE))
	72	#define BLKC_LOAD_E(PRE) BLKC_GLUE(LOAD32_, BLKC_ENDIAN(PRE))
	73
	74	/* --- Interface macros --- */
	75
	76	#define BLKC_STORE(PRE, b, w) \
	77	BLKC_GLUE(BLKC_STORE_, BLKC_TYPE(PRE)) \
	78	(PRE, b, w, BLKC_STORE_E(PRE), BLKC_BITS(PRE))
	79
	80	#define BLKC_XSTORE(PRE, b, w, wx) \
	81	BLKC_GLUE(BLKC_XSTORE_, BLKC_TYPE(PRE)) \
	82	(PRE, b, w, wx, BLKC_STORE_E(PRE), BLKC_BITS(PRE))
	83
	84	#define BLKC_LOAD(PRE, w, b) \
	85	BLKC_GLUE(BLKC_LOAD_, BLKC_TYPE(PRE)) \
	86	(PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE))
	87
	88	#define BLKC_XLOAD(PRE, w, b) \
	89	BLKC_GLUE(BLKC_XLOAD_, BLKC_TYPE(PRE)) \
	90	(PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE))
	91
	92	#define BLKC_MOVE(PRE, w, wx) \
	93	BLKC_GLUE(BLKC_MOVE_, BLKC_TYPE(PRE)) \
	94	(PRE, w, wx, BLKC_BITS(PRE))
	95
	96	#define BLKC_XMOVE(PRE, w, wx) \
	97	BLKC_GLUE(BLKC_XMOVE_, BLKC_TYPE(PRE)) \
	98	(PRE, w, wx, BLKC_BITS(PRE))
	99
c5885da8	100	#define BLKC_STEP(PRE, w) \
	101	BLKC_GLUE(BLKC_STEP_X_, BLKC_ENDIAN(PRE)) \
	102	(PRE, w)
	103
5c3f75ec	104	#define BLKC_ZERO(PRE, w) \
	105	BLKC_GLUE(BLKC_ZERO_, BLKC_TYPE(PRE)) \
	106	(PRE, w, BLKC_BITS(PRE))
	107
c5885da8	108	#define BLKC_SET(PRE, w, x) \
	109	BLKC_GLUE(BLKC_SET_X_, BLKC_ENDIAN(PRE)) \
	110	(PRE, w, x)
	111
	112	#define BLKC_SHOW(PRE, tag, w) do { \
	113	fputs(tag ": ", stdout); \
	114	BLKC_SKEL_X(PRE, BLKC_W(w);, printf("%08x ", *_w++);); \
	115	fputc('\n', stdout); \
	116	} while (0)
	117
d03ab969	118	/* --- General implementation skeleton --- */
	119
	120	#define BLKC_SKEL(PRE, decl, guts) do { \
	121	decl \
	122	guts \
	123	} while (0)
	124
	125	#define BLKC_P(p) register octet _p = (octet )(p)
	126	#define BLKC_W(w) register uint32 *_w = (w)
c5885da8	127	#define BLKC_WX(wx) register uint32 *_wx = (wx)
d03ab969	128
	129	/* --- Implementation for unusual block sizes --- */
	130
	131	#define BLKC_SKEL_X(PRE, decl, guts) \
c5885da8	132	BLKC_SKEL(PRE, unsigned _i; decl, \
b3f05084	133	for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \
d03ab969	134	guts \
	135	})
	136
	137	#define BLKC_STORE_X(PRE, b, w, op, n) \
	138	BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w);, \
	139	op(_p, *_w); _p += 4; _w++; )
	140
	141	#define BLKC_XSTORE_X(PRE, b, w, wx, op, n) \
	142	BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);, \
	143	op(_p, _w ^ _wx); _p += 4; _w++; _wx++; )
	144
	145	#define BLKC_LOAD_X(PRE, w, b, op, n) \
	146	BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);, \
	147	*_w = op(_p); _p += 4; _w++; )
	148
	149	#define BLKC_XLOAD_X(PRE, w, b, op, n) \
	150	BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);, \
	151	*_w ^= op(_p); _p += 4; _w++; )
	152
	153	#define BLKC_MOVE_X(PRE, w, wx, n) \
	154	BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);, \
	155	_w = _wx; _w++; _wx++; ) \
	156
	157	#define BLKC_XMOVE_X(PRE, w, wx, n) \
	158	BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);, \
	159	_w ^= _wx; _w++; _wx++; ) \
	160
5c3f75ec	161	#define BLKC_ZERO_X(PRE, w, n) \
	162	BLKC_SKEL_X(PRE, BLKC_W(w);, *_w++ = 0;)
	163
c5885da8	164	#define BLKC_STEP_X_B(PRE, w) do { \
	165	unsigned _i = PRE##_BLKSZ / 4; BLKC_W(w); uint32 _x = 0; \
	166	while (_i && !_x) { _i--; _w[_i] = _x = U32(_w[_i] + 1); } \
	167	} while (0)
	168
	169	#define BLKC_STEP_X_L(PRE, w) do { \
	170	unsigned _i = 0; BLKC_W(w); uint32 _x = 0; \
	171	while (_i < PRE##_BLKSZ / 4 && !_x) \
	172	{ _w[_i] = _x = U32(_w[_i] + 1); _i++; } \
	173	} while (0)
	174
	175	#define BLKC_SET_X_B(PRE, w, x) do { \
	176	unsigned _i; BLKC_W(w); unsigned long _x = x; \
	177	for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \
	178	*_w++ = U32(_x); \
	179	_x = ((_x & ~MASK32) >> 16) >> 16; \
	180	} \
	181	} while (0)
	182
	183	#define BLKC_SET_X_L(PRE, w, x) do { \
	184	unsigned _i; BLKC_W(w); unsigned long _x = x; _w += PRE##_BLKSZ / 4; \
	185	for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \
	186	*--_w = U32(_x); \
	187	_x = ((_x & ~MASK32) >> 16) >> 16; \
	188	} \
	189	} while (0)
	190
d03ab969	191	/* --- Implementation for known block sizes --- */
	192
	193	#define BLKC_SKEL_64(PRE, decl, op, guts) \
	194	BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1);)
	195
c5885da8	196	#define BLKC_SKEL_96(PRE, decl, op, guts) \
	197	BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1); guts(op, 2);)
	198
d03ab969	199	#define BLKC_SKEL_128(PRE, decl, op, guts) \
	200	BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3);)
	201
70f31709	202	#define BLKC_SKEL_192(PRE, decl, op, guts) \
	203	BLKC_SKEL(PRE, decl, \
	204	guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3); \
	205	guts(op, 4); guts(op, 5);)
	206
	207	#define BLKC_SKEL_256(PRE, decl, op, guts) \
	208	BLKC_SKEL(PRE, decl, \
	209	guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3); \
	210	guts(op, 4); guts(op, 5); guts(op, 6); guts(op, 7);)
	211
d03ab969	212	#define BLKC_STORE_GUTS(op, i) op(_p + 4 * i, _w[i])
	213	#define BLKC_XSTORE_GUTS(op, i) op(_p + 4 * i, _w[i] ^ _wx[i])
	214	#define BLKC_LOAD_GUTS(op, i) _w[i] = op(_p + 4 * i)
	215	#define BLKC_XLOAD_GUTS(op, i) _w[i] ^= op(_p + 4 * i)
	216	#define BLKC_MOVE_GUTS(op, i) _w[i] = _wx[i]
	217	#define BLKC_XMOVE_GUTS(op, i) _w[i] ^= _wx[i]
5c3f75ec	218	#define BLKC_ZERO_GUTS(op, i) _w[i] = 0
d03ab969	219
	220	#define BLKC_STORE_N(PRE, b, w, op, n) \
	221	BLKC_GLUE(BLKC_SKEL_, n) \
	222	(PRE, BLKC_P(b); const BLKC_W(w);, op, BLKC_STORE_GUTS)
	223
	224	#define BLKC_XSTORE_N(PRE, b, w, wx, op, n) \
	225	BLKC_GLUE(BLKC_SKEL_, n) \
	226	(PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);, \
	227	op, BLKC_XSTORE_GUTS)
	228
	229	#define BLKC_LOAD_N(PRE, w, b, op, n) \
	230	BLKC_GLUE(BLKC_SKEL_, n) \
	231	(PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_LOAD_GUTS)
	232
	233	#define BLKC_XLOAD_N(PRE, w, b, op, n) \
	234	BLKC_GLUE(BLKC_SKEL_, n) \
	235	(PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_XLOAD_GUTS)
	236
	237	#define BLKC_MOVE_N(PRE, w, wx, n) \
	238	BLKC_GLUE(BLKC_SKEL_, n) \
	239	(PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_MOVE_GUTS)
	240
5c3f75ec	241	#define BLKC_ZERO_N(PRE, w, n) \
	242	BLKC_GLUE(BLKC_SKEL_, n) \
	243	(PRE, BLKC_W(w); , op, BLKC_ZERO_GUTS)
	244
d03ab969	245	#define BLKC_XMOVE_N(PRE, w, wx, n) \
	246	BLKC_GLUE(BLKC_SKEL_, n) \
	247	(PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_XMOVE_GUTS)
	248
	249	/----- Test rig for block ciphers ----------------------------------------/
	250
	251	/* --- @BLKC_TEST@ --- *
	252	*
	253	* Arguments: @PRE@, @pre@ = prefixes for cipher-specific definitions
	254	*
	255	* Use: Standard test rig for block ciphers.
	256	*/
	257
	258	#ifdef TEST_RIG
	259
f94b972d	260	#include <string.h>
45c0fd36	261
d03ab969	262	#include <mLib/quis.h>
	263	#include <mLib/testrig.h>
	264
dcdc42e7	265	#define BLKC_VERIFY(PRE, pre) \
d03ab969	266	\
dcdc42e7	267	static int pre##_verify(dstr *v) \
d03ab969	268	{ \
b3f05084	269	pre##_ctx k; \
	270	uint32 p[PRE##_BLKSZ / 4]; \
	271	uint32 c[PRE##_BLKSZ / 4]; \
	272	uint32 d[PRE##_BLKSZ / 4]; \
d03ab969	273	dstr b = DSTR_INIT; \
	274	int ok = 1; \
	275	\
	276	/* --- Initialize the key buffer --- */ \
	277	\
b3f05084	278	dstr_ensure(&b, PRE##_BLKSZ); \
	279	b.len = PRE##_BLKSZ; \
	280	pre##_init(&k, v[0].buf, v[0].len); \
d03ab969	281	BLKC_LOAD(PRE, p, v[1].buf); \
	282	BLKC_LOAD(PRE, c, v[2].buf); \
	283	\
	284	/* --- Test encryption --- */ \
	285	\
	286	BLKC_MOVE(PRE, d, p); \
b3f05084	287	pre##_eblk(&k, d, d); \
d03ab969	288	BLKC_STORE(PRE, b.buf, d); \
b3f05084	289	if (memcmp(b.buf, v[2].buf, PRE##_BLKSZ)) { \
d03ab969	290	ok = 0; \
d03ab969	291	printf("\nfail encryption:" \
45c0fd36	292	"\n\tkey = "); \
d03ab969	293	type_hex.dump(&v[0], stdout); \
	294	printf("\n\tplaintext = "); type_hex.dump(&v[1], stdout); \
	295	printf("\n\texpected = "); type_hex.dump(&v[2], stdout); \
	296	printf("\n\tcalculated = "); type_hex.dump(&b, stdout); \
	297	putchar('\n'); \
	298	} \
	299	\
	300	/* --- Test decryption --- */ \
	301	\
	302	BLKC_MOVE(PRE, d, c); \
b3f05084	303	pre##_dblk(&k, d, d); \
d03ab969	304	BLKC_STORE(PRE, b.buf, d); \
b3f05084	305	if (memcmp(b.buf, v[1].buf, PRE##_BLKSZ)) { \
d03ab969	306	ok = 0; \
d03ab969	307	printf("\nfail decryption:" \
45c0fd36	308	"\n\tkey = "); \
d03ab969	309	type_hex.dump(&v[0], stdout); \
	310	printf("\n\tciphertext = "); type_hex.dump(&v[2], stdout); \
	311	printf("\n\texpected = "); type_hex.dump(&v[1], stdout); \
	312	printf("\n\tcalculated = "); type_hex.dump(&b, stdout); \
	313	putchar('\n'); \
	314	} \
	315	\
	316	/* --- Return --- */ \
	317	\
	318	return (ok); \
dcdc42e7	319	}
	320
	321	#define BLKC_TEST(PRE, pre) \
	322	\
	323	BLKC_VERIFY(PRE, pre) \
d03ab969	324	\
4e66da02	325	static const test_chunk defs[] = { \
dcdc42e7	326	{ #pre, pre##_verify, { &type_hex, &type_hex, &type_hex, 0 } }, \
d03ab969	327	{ 0, 0, { 0 } } \
	328	}; \
	329	\
	330	int main(int argc, char *argv[]) \
	331	{ \
	332	test_run(argc, argv, defs, SRCDIR"/tests/" #pre); \
	333	return (0); \
	334	}
	335
	336	#else
dcdc42e7	337	# define BLKC_VERIFY(PRE, pre)
d03ab969	338	# define BLKC_TEST(PRE, pre)
	339	#endif
	340
	341	/----- That's all, folks -------------------------------------------------/
	342
	343	#ifdef __cplusplus
	344	}
	345	#endif
	346
	347	#endif