+++ /dev/null
-/* -*-c-*-
- *
- * $Id: hmac-def.h,v 1.8 2004/04/08 01:36:15 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.
- */
-
-#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##_hmackeysz[] = { KSZ_ANY, PRE##_STATESZ }; \
-const octet pre##_sslmackeysz[] = { KSZ_ANY, PRE##_STATESZ }; \
-const octet pre##_nmackeysz[] = { KSZ_SET, 2 * PRE##_STATESZ, 0 }; \
- \
-/* --- @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##_STATESZ); \
- memcpy(key->ichain, ik, PRE##_STATESZ); \
- 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_sslmacinit@ --- * \
- * \
- * 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 hasing using the SSL3 \
- * variant of HMAC. \
- */ \
- \
-void pre##_sslmacinit(pre##_mackey *key, const void *k, size_t sz) \
-{ \
- 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); \
- memcpy(ctx.buf, kbuf, sz); \
- memset(ctx.buf + sz, 0x5c, PRE##_BUFSZ - sz); \
- pre##_compress(&ctx, ctx.buf); \
- pre##_state(&ctx, key->ochain); \
- \
- pre##_init(&ctx); \
- memcpy(ctx.buf, kbuf, sz); \
- memset(ctx.buf + sz, 0x36, PRE##_BUFSZ - sz); \
- 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##_STATESZ); \
- 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, gnops, gsslops; \
- \
-typedef struct gkctx { \
- gmac m; \
- const ghash_ops *gops; \
- 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 = gk->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; \
- gk->gops = &gops; \
- pre##_hmacinit(&gk->k, k, sz); \
- return (&gk->m); \
-} \
- \
-static gmac *gnkey(const void *k, size_t sz) \
-{ \
- gkctx *gk = S_CREATE(gkctx); \
- const octet *kk = k; \
- assert(keysz(sz, pre##_nmackeysz) == sz); \
- gk->m.ops = &gkops; \
- gk->gops = &gnops; \
- pre##_nmacinit(&gk->k, kk, kk + PRE##_STATESZ); \
- return (&gk->m); \
-} \
- \
-static gmac *gsslkey(const void *k, size_t sz) \
-{ \
- gkctx *gk = S_CREATE(gkctx); \
- gk->m.ops = &gkops; \
- gk->gops = &gsslops; \
- pre##_sslmacinit(&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##_nmac = \
- { #pre "-nmac", PRE##_HASHSZ, pre##_nmackeysz, gnkey }; \
-const gcmac pre##_hmac = \
- { #pre "-hmac", PRE##_HASHSZ, pre##_hmackeysz, gkey }; \
-const gcmac pre##_sslmac = \
- { #pre "-sslmac", PRE##_HASHSZ, pre##_sslmackeysz, gsslkey }; \
-static const gmac_ops gkops = { &pre##_hmac, gkinit, gkdestroy }; \
-static const gmac_ops gnkops = { &pre##_nmac, gkinit, gkdestroy }; \
-static const gmac_ops gsslkops = { &pre##_sslmac, gkinit, gkdestroy }; \
-static const gchash gch = { #pre "-hmac", PRE##_HASHSZ, ghinit }; \
-static const ghash_ops gops = \
- { &gch, ghhash, ghdone, ghdestroy, ghcopy }; \
-static const gchash gnch = { #pre "-nmac", PRE##_HASHSZ, ghinit }; \
-static const ghash_ops gnops = \
- { &gch, ghhash, ghdone, ghdestroy, ghcopy }; \
-static const gchash gsslch = { #pre "-sslmac", PRE##_HASHSZ, ghinit }; \
-static const ghash_ops gsslops = \
- { &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
projects / u / mdw / catacomb / blobdiff