Diff: tinydtls/hmac.c

Revision:

1:391ec57807fa

Parent:

0:6ae42a2aff75

Child:

2:21019cad4c93

--- a/tinydtls/hmac.c	Wed Oct 09 14:48:52 2013 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,169 +0,0 @@
-/* dtls -- a very basic DTLS implementation
- *
- * Copyright (C) 2011--2012 Olaf Bergmann <bergmann@tzi.org>
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#ifdef HAVE_ASSERT_H
-#include <assert.h>
-#endif
-
-#include "debug.h"
-#include "hmac.h"
-/* use malloc()/free() on platforms other than Contiki */
-#ifndef WITH_CONTIKI
-#include <stdlib.h>
-
-static inline dtls_hmac_context_t *
-dtls_hmac_context_new() {
-  return (dtls_hmac_context_t *)malloc(sizeof(dtls_hmac_context_t));
-}
-
-static inline void
-dtls_hmac_context_free(dtls_hmac_context_t *ctx) {
-  free(ctx);
-}
-
-#else /* WITH_CONTIKI */
-#include "memb.h"
-MEMB(hmac_context_storage, dtls_hmac_context_t, DTLS_HASH_MAX);
-
-static inline dtls_hmac_context_t *
-dtls_hmac_context_new() {
-  return (dtls_hmac_context_t *)memb_alloc(&hmac_context_storage);
-}
-
-static inline void
-dtls_hmac_context_free(dtls_hmac_context_t *ctx) {
-  memb_free(&hmac_context_storage, ctx);
-}
-#endif /* WITH_CONTIKI */
-
-void
-dtls_hmac_storage_init() {
-#ifdef WITH_CONTIKI
-  memb_init(&hmac_context_storage);
-#endif /* WITH_CONTIKI */
-}
-
-void
-dtls_hmac_update(dtls_hmac_context_t *ctx,
-		 const unsigned char *input, size_t ilen) {
-  assert(ctx);
-  dtls_hash_update(&ctx->data, input, ilen);
-}
-
-dtls_hmac_context_t *
-dtls_hmac_new(const unsigned char *key, size_t klen) {
-  dtls_hmac_context_t *ctx;
-
-  ctx = dtls_hmac_context_new();
-  if (ctx) 
-    dtls_hmac_init(ctx, key, klen);
-
-  return ctx;
-}
-
-void
-dtls_hmac_init(dtls_hmac_context_t *ctx, const unsigned char *key, size_t klen) {
-  int i;
-
-  assert(ctx);
-
-  memset(ctx, 0, sizeof(dtls_hmac_context_t));
-
-  if (klen > DTLS_HMAC_BLOCKSIZE) {
-    dtls_hash_init(&ctx->data);
-    dtls_hash_update(&ctx->data, key, klen);
-    dtls_hash_finalize(ctx->pad, &ctx->data);
-  } else
-    memcpy(ctx->pad, key, klen);
-
-  /* create ipad: */
-  for (i=0; i < DTLS_HMAC_BLOCKSIZE; ++i)
-    ctx->pad[i] ^= 0x36;
-
-  dtls_hash_init(&ctx->data);
-  dtls_hmac_update(ctx, ctx->pad, DTLS_HMAC_BLOCKSIZE);
-
-  /* create opad by xor-ing pad[i] with 0x36 ^ 0x5C: */
-  for (i=0; i < DTLS_HMAC_BLOCKSIZE; ++i)
-    ctx->pad[i] ^= 0x6A;
-}
-
-void
-dtls_hmac_free(dtls_hmac_context_t *ctx) {
-  if (ctx)
-    dtls_hmac_context_free(ctx);
-}
-
-int
-dtls_hmac_finalize(dtls_hmac_context_t *ctx, unsigned char *result) {
-  unsigned char buf[DTLS_HMAC_DIGEST_SIZE];
-  size_t len; 
-
-  assert(ctx);
-  assert(result);
-  
-  len = dtls_hash_finalize(buf, &ctx->data);
-
-  dtls_hash_init(&ctx->data);
-  dtls_hash_update(&ctx->data, ctx->pad, DTLS_HMAC_BLOCKSIZE);
-  dtls_hash_update(&ctx->data, buf, len);
-
-  len = dtls_hash_finalize(result, &ctx->data);
-
-  return len;
-}
-
-#ifdef HMAC_TEST
-#include <stdio.h>
-
-int main(int argc, char **argv) {
-  static unsigned char buf[DTLS_HMAC_DIGEST_SIZE];
-  size_t len, i;
-  dtls_hmac_context_t *ctx;
-
-  if (argc < 3) {
-    fprintf(stderr, "usage: %s key text", argv[0]);
-    return -1;
-  }
-
-  dtls_hmac_storage_init();
-  ctx = dtls_hmac_new(argv[1], strlen(argv[1]));
-  assert(ctx);
-  dtls_hmac_update(ctx, argv[2], strlen(argv[2]));
-  
-  len = dtls_hmac_finalize(ctx, buf);
-
-  for(i = 0; i < len; i++) 
-    printf("%02x", buf[i]);
-  printf("\n");
-
-  dtls_hmac_free(ctx);
-
-  return 0;
-}
-#endif