-fix time assertion introduce in last patch

[oweals/gnunet.git] / src / util / crypto_hash.c

diff --git a/src/util/crypto_hash.c b/src/util/crypto_hash.c
index e14e7c898392d0b85141a6ec63f983ae4d1981e4..60ed6582d7bb71fd3291c1a2b0b8c6114e73092e 100644 (file)
--- a/src/util/crypto_hash.c
+++ b/src/util/crypto_hash.c
@@ -36,12 +36,14 @@
 /**
  * Hash block of given size.
  *
- * @param block the data to GNUNET_CRYPTO_hash, length is given as a second argument
- * @param size the length of the data to GNUNET_CRYPTO_hash
+ * @param block the data to #GNUNET_CRYPTO_hash, length is given as a second argument
+ * @param size the length of the data to #GNUNET_CRYPTO_hash in @a block
  * @param ret pointer to where to write the hashcode
  */
 void
-GNUNET_CRYPTO_hash (const void *block, size_t size, struct GNUNET_HashCode * ret)
+GNUNET_CRYPTO_hash (const void *block,
+                    size_t size,
+                    struct GNUNET_HashCode *ret)
 {
   gcry_md_hash_buffer (GCRY_MD_SHA512, ret, block, size);
 }
@@ -561,19 +563,27 @@ GNUNET_CRYPTO_hmac_derive_key_v (struct GNUNET_CRYPTO_AuthKey *key,
 void
 GNUNET_CRYPTO_hmac (const struct GNUNET_CRYPTO_AuthKey *key,
                     const void *plaintext, size_t plaintext_len,
-                    struct GNUNET_HashCode * hmac)
+                    struct GNUNET_HashCode *hmac)
 {
-  gcry_md_hd_t md;
+  static int once;
+  static gcry_md_hd_t md;
   const unsigned char *mc;
 
-  GNUNET_assert (GPG_ERR_NO_ERROR ==
-                 gcry_md_open (&md, GCRY_MD_SHA512, GCRY_MD_FLAG_HMAC));
+  if (! once)
+  {
+    once = 1;
+    GNUNET_assert (GPG_ERR_NO_ERROR ==
+                   gcry_md_open (&md, GCRY_MD_SHA512, GCRY_MD_FLAG_HMAC));
+  }
+  else
+  {
+    gcry_md_reset (md);
+  }
   gcry_md_setkey (md, key->key, sizeof (key->key));
   gcry_md_write (md, plaintext, plaintext_len);
   mc = gcry_md_read (md, GCRY_MD_SHA512);
-  if (mc != NULL)
-    memcpy (hmac->bits, mc, sizeof (hmac->bits));
-  gcry_md_close (md);
+  GNUNET_assert (NULL != mc);
+  memcpy (hmac->bits, mc, sizeof (hmac->bits));
 }