[u/mdw/catacomb] / hmac-def.h

/* -*-c-*-
 *
 * $Id: hmac-def.h,v 1.4 2000/07/15 10:00:58 mdw Exp $
 *
 * Definitions for HMAC and NMAC
 *
 * (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.
 */

/*----- Revision history --------------------------------------------------* 
 *
 * $Log: hmac-def.h,v $
 * Revision 1.4  2000/07/15 10:00:58  mdw
 * New generic hash operation for copying hash contexts.
 *
 * Revision 1.3  2000/07/02 18:27:42  mdw
 * (ghash->ops->done): Interface change.  Passing in a null buffer pointer
 * uses a buffer internal to the ghash object.  The operation returns the
 * address of the buffer it used.  Clients of generic hashes no longer need
 * to use dynamically allocated memory for hash results.
 *
 * Revision 1.2  2000/06/17 11:23:44  mdw
 * Use secure arena for memory allocation.  Minor changes in the generic
 * hash interface.
 *
 * Revision 1.1  1999/12/10 23:16:40  mdw
 * Split mode macros into interface and implementation.
 *
 */

#ifndef CATACOMB_HMAC_DEF_H
#define CATACOMB_HMAC_DEF_H

#ifdef __cplusplus
  extern "C" {
#endif

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

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

#include <mLib/bits.h>
#include <mLib/sub.h>

#ifndef CATACOMB_ARENA_H
#  include "arena.h"
#endif

#ifndef CATACOMB_GMAC_H
#  include "gmac.h"
#endif

#ifndef CATACOMB_PARANOIA_H
#  include "paranoia.h"
#endif

/*----- Macros ------------------------------------------------------------*/

/* --- @HMAC_DEF@ --- *
 *
 * Arguments:	@PRE@, @pre@ = prefixes for the underlying hash function
 *
 * Use:		Creates implementations for the HMAC and NMAC functions.
 */

#define HMAC_DEF(PRE, pre)						\
									\
/* --- Useful constants --- */						\
									\
const octet pre##_mackeysz[] = { KSZ_ANY, PRE##_HASHSZ };		\
									\
/* --- @pre_nmacinit@ --- *						\
 *									\
 * Arguments:	@pre_macctx *key@ = pointer to a MAC key object		\
 *		@const void *ok@ = pointer to outer hash init vector	\
 *		@const void *ik@ = pointer to inner hash init vector	\
 *									\
 * Returns:	---							\
 *									\
 * Use:		Initializes a MAC key for doing NMAC hashing.		\
 */									\
									\
void pre##_nmacinit(pre##_mackey *key, const void *ok, const void *ik)	\
{									\
  memcpy(key->ochain, ok, PRE##_HASHSZ);				\
  memcpy(key->ichain, ik, PRE##_HASHSZ);				\
  key->ocount = key->icount = 0;					\
}									\
									\
/* --- @pre_hmacinit@ --- *						\
 *									\
 * Arguments:	@pre_mackey *key@ = pointer to MAC key object		\
 *		@const void *k@ = pointer to key to use			\
 *		@size_t sz@ = size of key data				\
 *									\
 * Returns:	---							\
 *									\
 * Use:		Initializes a MAC key for doing HMAC hashing.  Keys	\
 *		longer than the hash function's output size aren't very	\
 *		useful, but are accepted.  Keys longer than the hash's	\
 *		block size are also accepted; they are hashed before	\
 *		use, as specified in RFC2104.				\
 */									\
									\
void pre##_hmacinit(pre##_mackey *key, const void *k, size_t sz)	\
{									\
  int i;								\
  const octet *kbuf = k;						\
  pre##_ctx ctx;							\
  octet buf[PRE##_HASHSZ];						\
									\
  if (sz > PRE##_BUFSZ)	{						\
    pre##_init(&ctx);							\
    pre##_hash(&ctx, k, sz);						\
    pre##_done(&ctx, buf);						\
    kbuf = buf;								\
    sz = PRE##_HASHSZ;							\
  }									\
									\
  pre##_init(&ctx);							\
  memset(ctx.buf, 0x5c, PRE##_BUFSZ);					\
  for (i = 0; i < sz; i++)						\
    ctx.buf[i] ^= kbuf[i];						\
  pre##_compress(&ctx, ctx.buf);					\
  pre##_state(&ctx, key->ochain);					\
									\
  pre##_init(&ctx);							\
  memset(ctx.buf, 0x36, PRE##_BUFSZ);					\
  for (i = 0; i < sz; i++)						\
    ctx.buf[i] ^= kbuf[i];						\
  pre##_compress(&ctx, ctx.buf);					\
  pre##_state(&ctx, key->ichain);					\
									\
  key->ocount = key->icount = PRE##_BUFSZ;				\
  BURN(ctx);								\
}									\
									\
/* --- @pre_macinit@ --- *						\
 *									\
 * Arguments:	@pre_macctx *ctx@ = pointer to MAC context block	\
 *		@const pre_mackey *key@ = pointer to MAC key block	\
 *									\
 * Returns:	---							\
 *									\
 * Use:		Instantiates a MAC context from a key block.		\
 */									\
									\
void pre##_macinit(pre##_macctx *ctx, const pre##_mackey *key)		\
{									\
  memcpy(ctx->chain, key->ochain, PRE##_HASHSZ);			\
  ctx->count = key->ocount;						\
  pre##_set(&ctx->ctx, key->ichain, key->icount);			\
}									\
									\
/* --- @pre_machash@ --- *						\
 *									\
 * Arguments:	@pre_macctx *ctx@ = pointer to MAC context block	\
 *		@const void *buf@ = pointer to buffer			\
 *		@size_t sz@ = size of the buffer			\
 *									\
 * Returns:	---							\
 *									\
 * Use:		Hashes a buffer.					\
 */									\
									\
void pre##_machash(pre##_macctx *ctx, const void *buf, size_t sz)	\
{									\
  pre##_hash(&ctx->ctx, buf, sz);					\
}									\
									\
/* --- @pre_macdone@ --- *						\
 *									\
 * Arguments:	@pre_macctx *ctx@ = pointer to MAC context block	\
 *		@void *mac@ = pointer to buffer to receive MAC		\
 *									\
 * Returns:	---							\
 *									\
 * Use:		Returns the result of a MAC computation.		\
 */									\
									\
void pre##_macdone(pre##_macctx *ctx, void *mac)			\
{									\
  pre##_done(&ctx->ctx, mac);						\
  pre##_set(&ctx->ctx, ctx->chain, ctx->count);				\
  pre##_hash(&ctx->ctx, mac, PRE##_HASHSZ);				\
  pre##_done(&ctx->ctx, mac);						\
}									\
									\
/* --- Generic MAC interface --- */					\
									\
static const gmac_ops gkops;						\
static const ghash_ops gops;						\
									\
typedef struct gkctx {							\
  gmac m;								\
  pre##_mackey k;							\
} gkctx;								\
									\
typedef struct gctx {							\
  ghash h;								\
  pre##_macctx c;							\
  octet buf[PRE##_HASHSZ];						\
} gctx;									\
									\
static ghash *gkinit(gmac *m)						\
{									\
  gkctx *gk = (gkctx *)m;						\
  gctx *g = S_CREATE(gctx);						\
  g->h.ops = &gops;							\
  pre##_macinit(&g->c, &gk->k);						\
  return (&g->h);							\
}									\
									\
static gmac *gkey(const void *k, size_t sz)				\
{									\
  gkctx *gk = S_CREATE(gkctx);						\
  gk->m.ops = &gkops;							\
  pre##_hmacinit(&gk->k, k, sz);					\
  return (&gk->m);							\
}									\
									\
static void ghhash(ghash *h, const void *p, size_t sz)			\
{									\
  gctx *g = (gctx *)h;							\
  pre##_machash(&g->c, p, sz);						\
}									\
									\
static octet *ghdone(ghash *h, void *buf)				\
{									\
  gctx *g = (gctx *)h;							\
  if (!buf)								\
    buf = g->buf;							\
  pre##_macdone(&g->c, buf);						\
  return (buf);								\
}									\
									\
static ghash *ghcopy(ghash *h)						\
{									\
  gctx *g = (gctx *)h;							\
  gctx *gg = S_CREATE(gctx);						\
  memcpy(gg, g, sizeof(gctx));						\
  return (&gg->h);							\
}									\
									\
static void ghdestroy(ghash *h)						\
{									\
  gctx *g = (gctx *)h;							\
  BURN(*g);								\
  S_DESTROY(g);								\
}									\
									\
static void gkdestroy(gmac *m)						\
{									\
  gkctx *gk = (gkctx *)m;						\
  BURN(*gk);								\
  S_DESTROY(gk);							\
}									\
									\
static ghash *ghinit(void)						\
{									\
  assert(((void)"Attempt to instantiate an unkeyed MAC", 0));		\
  return (0);								\
}									\
									\
const gcmac pre##_hmac =						\
  { #pre "-hmac", PRE##_HASHSZ, pre##_mackeysz, gkey };			\
static const gmac_ops gkops = { &pre##_hmac, gkinit, gkdestroy };	\
static const gchash gch = { #pre "-hmac", PRE##_HASHSZ, ghinit };	\
static const ghash_ops gops =						\
  { &gch, ghhash, ghdone, ghdestroy, ghcopy };				\
									\
HMAC_TEST(PRE, pre)

/* --- @HMAC_TEST@ --- *
 *
 * Arguments:	@PRE@, @pre@ = prefixes for hash-specfic definitions
 *
 * Use:		Standard test rig for MAC functions.
 */

#ifdef TEST_RIG

#include <stdio.h>

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

#define HMAC_TEST(PRE, pre)						\
									\
static int macverify(dstr *v)						\
{									\
  pre##_macctx cctx;							\
  pre##_mackey ckey;							\
  int ok = 1;								\
  int i;								\
  octet *p;								\
  int szs[] = { 1, 7, 192, -1, 0 }, *ip;				\
  size_t csz;								\
  dstr d;								\
									\
  dstr_create(&d);							\
  dstr_ensure(&d, PRE##_HASHSZ);					\
  d.len = PRE##_HASHSZ;							\
									\
  pre##_hmacinit(&ckey, v[1].buf, v[1].len);				\
									\
  for (ip = szs; *ip; ip++) {						\
    i = *ip;								\
    csz = v[0].len;							\
    if (i == -1)							\
      i = csz;								\
    if (i > csz)							\
      continue;								\
    p = (octet *)v[0].buf;						\
    pre##_macinit(&cctx, &ckey);					\
    while (csz) {							\
      if (i > csz)							\
	i = csz;							\
      pre##_machash(&cctx, p, i);					\
      p += i;								\
      csz -= i;								\
    }									\
    pre##_macdone(&cctx, d.buf);					\
    if (memcmp(d.buf, v[2].buf, PRE##_HASHSZ) != 0) {			\
      printf("\nfail:\n\tstep = %i\n\tinput = `%s'\n\tkey = ",		\
	     *ip, v[0].buf);						\
      type_hex.dump(&v[1], stdout);					\
      fputs("\n\texpected = ", stdout);					\
      type_hex.dump(&v[2], stdout);					\
      fputs("\n\tcomputed = ", stdout);					\
      type_hex.dump(&d, stdout);					\
      putchar('\n');							\
      ok = 0;								\
    }									\
  }									\
									\
  dstr_destroy(&d);							\
  return (ok);								\
}									\
									\
static test_chunk macdefs[] = {						\
  { #pre "-hmac", macverify,						\
    { &type_string, &type_hex, &type_hex, 0 } },			\
  { 0, 0, { 0 } }							\
};									\
									\
int main(int argc, char *argv[])					\
{									\
  ego(argv[0]);								\
  test_run(argc, argv, macdefs, SRCDIR"/tests/" #pre);			\
  return (0);								\
}

#else
#  define HMAC_TEST(PRE, pre)
#endif

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

#ifdef __cplusplus
  }
#endif

#endif
Commit	Line	Data
79ba130c	1	/* --c--
79ba130c	2	*
d2fdbc2c	3	* $Id: hmac-def.h,v 1.4 2000/07/15 10:00:58 mdw Exp $
79ba130c	4	*
	5	* Definitions for HMAC and NMAC
	6	*
	7	* (c) 1999 Straylight/Edgeware
	8	*/
	9
	10	/----- Licensing notice --------------------------------------------------
	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.
	18	*
	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.
	23	*
	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
	30	/----- Revision history --------------------------------------------------
	31	*
	32	* $Log: hmac-def.h,v $
d2fdbc2c	33	* Revision 1.4 2000/07/15 10:00:58 mdw
	34	* New generic hash operation for copying hash contexts.
	35	*
a351d052	36	* Revision 1.3 2000/07/02 18:27:42 mdw
	37	* (ghash->ops->done): Interface change. Passing in a null buffer pointer
	38	* uses a buffer internal to the ghash object. The operation returns the
	39	* address of the buffer it used. Clients of generic hashes no longer need
	40	* to use dynamically allocated memory for hash results.
	41	*
28ef1f45	42	* Revision 1.2 2000/06/17 11:23:44 mdw
	43	* Use secure arena for memory allocation. Minor changes in the generic
	44	* hash interface.
	45	*
79ba130c	46	* Revision 1.1 1999/12/10 23:16:40 mdw
	47	* Split mode macros into interface and implementation.
	48	*
	49	*/
	50
	51	#ifndef CATACOMB_HMAC_DEF_H
	52	#define CATACOMB_HMAC_DEF_H
	53
	54	#ifdef __cplusplus
	55	extern "C" {
	56	#endif
	57
	58	/----- Header files ------------------------------------------------------/
	59
28ef1f45	60	#include <assert.h>
79ba130c	61	#include <stdlib.h>
	62	#include <string.h>
	63
	64	#include <mLib/bits.h>
	65	#include <mLib/sub.h>
	66
28ef1f45	67	#ifndef CATACOMB_ARENA_H
	68	# include "arena.h"
	69	#endif
	70
79ba130c	71	#ifndef CATACOMB_GMAC_H
	72	# include "gmac.h"
	73	#endif
	74
	75	#ifndef CATACOMB_PARANOIA_H
	76	# include "paranoia.h"
	77	#endif
	78
	79	/----- Macros ------------------------------------------------------------/
	80
	81	/* --- @HMAC_DEF@ --- *
	82	*
	83	* Arguments: @PRE@, @pre@ = prefixes for the underlying hash function
	84	*
	85	* Use: Creates implementations for the HMAC and NMAC functions.
	86	*/
	87
	88	#define HMAC_DEF(PRE, pre) \
	89	\
28ef1f45	90	/* --- Useful constants --- */ \
	91	\
	92	const octet pre##_mackeysz[] = { KSZ_ANY, PRE##_HASHSZ }; \
	93	\
79ba130c	94	/* --- @pre_nmacinit@ --- * \
	95	* \
	96	* Arguments: @pre_macctx *key@ = pointer to a MAC key object \
	97	* @const void *ok@ = pointer to outer hash init vector \
	98	* @const void *ik@ = pointer to inner hash init vector \
	99	* \
	100	* Returns: --- \
	101	* \
	102	* Use: Initializes a MAC key for doing NMAC hashing. \
	103	*/ \
	104	\
	105	void pre##_nmacinit(pre##_mackey key, const void ok, const void *ik) \
	106	{ \
	107	memcpy(key->ochain, ok, PRE##_HASHSZ); \
	108	memcpy(key->ichain, ik, PRE##_HASHSZ); \
	109	key->ocount = key->icount = 0; \
	110	} \
	111	\
	112	/* --- @pre_hmacinit@ --- * \
	113	* \
	114	* Arguments: @pre_mackey *key@ = pointer to MAC key object \
	115	* @const void *k@ = pointer to key to use \
	116	* @size_t sz@ = size of key data \
	117	* \
	118	* Returns: --- \
	119	* \
	120	* Use: Initializes a MAC key for doing HMAC hashing. Keys \
	121	* longer than the hash function's output size aren't very \
	122	* useful, but are accepted. Keys longer than the hash's \
	123	* block size are also accepted; they are hashed before \
	124	* use, as specified in RFC2104. \
	125	*/ \
	126	\
	127	void pre##_hmacinit(pre##_mackey key, const void k, size_t sz) \
	128	{ \
	129	int i; \
	130	const octet *kbuf = k; \
	131	pre##_ctx ctx; \
	132	octet buf[PRE##_HASHSZ]; \
	133	\
	134	if (sz > PRE##_BUFSZ) { \
	135	pre##_init(&ctx); \
	136	pre##_hash(&ctx, k, sz); \
	137	pre##_done(&ctx, buf); \
	138	kbuf = buf; \
	139	sz = PRE##_HASHSZ; \
	140	} \
	141	\
	142	pre##_init(&ctx); \
	143	memset(ctx.buf, 0x5c, PRE##_BUFSZ); \
	144	for (i = 0; i < sz; i++) \
	145	ctx.buf[i] ^= kbuf[i]; \
	146	pre##_compress(&ctx, ctx.buf); \
	147	pre##_state(&ctx, key->ochain); \
	148	\
	149	pre##_init(&ctx); \
	150	memset(ctx.buf, 0x36, PRE##_BUFSZ); \
	151	for (i = 0; i < sz; i++) \
	152	ctx.buf[i] ^= kbuf[i]; \
	153	pre##_compress(&ctx, ctx.buf); \
	154	pre##_state(&ctx, key->ichain); \
	155	\
	156	key->ocount = key->icount = PRE##_BUFSZ; \
	157	BURN(ctx); \
158	} \
159	\
160	/* --- @pre_macinit@ --- * \
161	* \
162	* Arguments: @pre_macctx *ctx@ = pointer to MAC context block \
163	* @const pre_mackey *key@ = pointer to MAC key block \
164	* \
165	* Returns: --- \
166	* \
167	* Use: Instantiates a MAC context from a key block. \
168	*/ \
169	\
170	void pre##_macinit(pre##_macctx ctx, const pre##_mackey key) \
171	{ \
172	memcpy(ctx->chain, key->ochain, PRE##_HASHSZ); \
173	ctx->count = key->ocount; \
174	pre##_set(&ctx->ctx, key->ichain, key->icount); \
175	} \
176	\
177	/* --- @pre_machash@ --- * \
178	* \
179	* Arguments: @pre_macctx *ctx@ = pointer to MAC context block \
180	* @const void *buf@ = pointer to buffer \
181	* @size_t sz@ = size of the buffer \
182	* \
183	* Returns: --- \
184	* \
185	* Use: Hashes a buffer. \
186	*/ \
187	\
188	void pre##_machash(pre##_macctx ctx, const void buf, size_t sz) \
189	{ \
190	pre##_hash(&ctx->ctx, buf, sz); \
191	} \
192	\
193	/* --- @pre_macdone@ --- * \
194	* \
195	* Arguments: @pre_macctx *ctx@ = pointer to MAC context block \
196	* @void *mac@ = pointer to buffer to receive MAC \
197	* \
198	* Returns: --- \
199	* \
200	* Use: Returns the result of a MAC computation. \
201	*/ \
202	\
203	void pre##_macdone(pre##_macctx ctx, void mac) \
204	{ \
205	pre##_done(&ctx->ctx, mac); \
206	pre##_set(&ctx->ctx, ctx->chain, ctx->count); \
207	pre##_hash(&ctx->ctx, mac, PRE##_HASHSZ); \
208	pre##_done(&ctx->ctx, mac); \
209	} \
210	\
211	/* --- Generic MAC interface --- */ \
212	\
213	static const gmac_ops gkops; \
214	static const ghash_ops gops; \
215	\
216	typedef struct gkctx { \
217	gmac m; \
218	pre##_mackey k; \
219	} gkctx; \
220	\
221	typedef struct gctx { \
222	ghash h; \
223	pre##_macctx c; \
a351d052	224	octet buf[PRE##_HASHSZ]; \
79ba130c	225	} gctx; \
	226	\
	227	static ghash gkinit(gmac m) \
	228	{ \
	229	gkctx gk = (gkctx )m; \
28ef1f45	230	gctx *g = S_CREATE(gctx); \
79ba130c	231	g->h.ops = &gops; \
	232	pre##_macinit(&g->c, &gk->k); \
	233	return (&g->h); \
	234	} \
	235	\
	236	static gmac gkey(const void k, size_t sz) \
	237	{ \
28ef1f45	238	gkctx *gk = S_CREATE(gkctx); \
79ba130c	239	gk->m.ops = &gkops; \
	240	pre##_hmacinit(&gk->k, k, sz); \
	241	return (&gk->m); \
	242	} \
	243	\
	244	static void ghhash(ghash h, const void p, size_t sz) \
	245	{ \
	246	gctx g = (gctx )h; \
	247	pre##_machash(&g->c, p, sz); \
	248	} \
	249	\
a351d052	250	static octet ghdone(ghash h, void *buf) \
79ba130c	251	{ \
79ba130c	252	gctx g = (gctx )h; \
a351d052	253	if (!buf) \
a351d052	254	buf = g->buf; \
79ba130c	255	pre##_macdone(&g->c, buf); \
a351d052	256	return (buf); \
79ba130c	257	} \
79ba130c	258	\
d2fdbc2c	259	static ghash ghcopy(ghash h) \
	260	{ \
	261	gctx g = (gctx )h; \
	262	gctx *gg = S_CREATE(gctx); \
	263	memcpy(gg, g, sizeof(gctx)); \
	264	return (&gg->h); \
	265	} \
	266	\
79ba130c	267	static void ghdestroy(ghash *h) \
	268	{ \
	269	gctx g = (gctx )h; \
28ef1f45	270	BURN(*g); \
28ef1f45	271	S_DESTROY(g); \
79ba130c	272	} \
	273	\
	274	static void gkdestroy(gmac *m) \
	275	{ \
	276	gkctx gk = (gkctx )m; \
28ef1f45	277	BURN(*gk); \
	278	S_DESTROY(gk); \
	279	} \
	280	\
	281	static ghash *ghinit(void) \
	282	{ \
	283	assert(((void)"Attempt to instantiate an unkeyed MAC", 0)); \
	284	return (0); \
79ba130c	285	} \
79ba130c	286	\
28ef1f45	287	const gcmac pre##_hmac = \
	288	{ #pre "-hmac", PRE##_HASHSZ, pre##_mackeysz, gkey }; \
	289	static const gmac_ops gkops = { &pre##_hmac, gkinit, gkdestroy }; \
	290	static const gchash gch = { #pre "-hmac", PRE##_HASHSZ, ghinit }; \
79ba130c	291	static const ghash_ops gops = \
d2fdbc2c	292	{ &gch, ghhash, ghdone, ghdestroy, ghcopy }; \
79ba130c	293	\
	294	HMAC_TEST(PRE, pre)
	295
	296	/* --- @HMAC_TEST@ --- *
	297	*
	298	* Arguments: @PRE@, @pre@ = prefixes for hash-specfic definitions
	299	*
	300	* Use: Standard test rig for MAC functions.
	301	*/
	302
	303	#ifdef TEST_RIG
	304
	305	#include <stdio.h>
	306
	307	#include <mLib/dstr.h>
	308	#include <mLib/quis.h>
	309	#include <mLib/testrig.h>
	310
	311	#define HMAC_TEST(PRE, pre) \
	312	\
	313	static int macverify(dstr *v) \
	314	{ \
	315	pre##_macctx cctx; \
	316	pre##_mackey ckey; \
	317	int ok = 1; \
	318	int i; \
	319	octet *p; \
	320	int szs[] = { 1, 7, 192, -1, 0 }, *ip; \
	321	size_t csz; \
	322	dstr d; \
	323	\
	324	dstr_create(&d); \
	325	dstr_ensure(&d, PRE##_HASHSZ); \
	326	d.len = PRE##_HASHSZ; \
	327	\
	328	pre##_hmacinit(&ckey, v[1].buf, v[1].len); \
	329	\
	330	for (ip = szs; *ip; ip++) { \
	331	i = *ip; \
	332	csz = v[0].len; \
	333	if (i == -1) \
	334	i = csz; \
	335	if (i > csz) \
	336	continue; \
	337	p = (octet *)v[0].buf; \
	338	pre##_macinit(&cctx, &ckey); \
	339	while (csz) { \
	340	if (i > csz) \
	341	i = csz; \
	342	pre##_machash(&cctx, p, i); \
	343	p += i; \
	344	csz -= i; \
	345	} \
	346	pre##_macdone(&cctx, d.buf); \
	347	if (memcmp(d.buf, v[2].buf, PRE##_HASHSZ) != 0) { \
	348	printf("\nfail:\n\tstep = %i\n\tinput = `%s'\n\tkey = ", \
	349	*ip, v[0].buf); \
	350	type_hex.dump(&v[1], stdout); \
	351	fputs("\n\texpected = ", stdout); \
	352	type_hex.dump(&v[2], stdout); \
	353	fputs("\n\tcomputed = ", stdout); \
	354	type_hex.dump(&d, stdout); \
	355	putchar('\n'); \
	356	ok = 0; \
357	} \
358	} \
359	\
360	dstr_destroy(&d); \
361	return (ok); \
362	} \
363	\
364	static test_chunk macdefs[] = { \
365	{ #pre "-hmac", macverify, \
366	{ &type_string, &type_hex, &type_hex, 0 } }, \
367	{ 0, 0, { 0 } } \
368	}; \
369	\
370	int main(int argc, char *argv[]) \
371	{ \
372	ego(argv[0]); \
373	test_run(argc, argv, macdefs, SRCDIR"/tests/" #pre); \
374	return (0); \
375	}
376
377	#else
378	# define HMAC_TEST(PRE, pre)
379	#endif
380
381	/----- That's all, folks -------------------------------------------------/
382
383	#ifdef __cplusplus
384	}
385	#endif
386
387	#endif