From 7cde88367991dcd1deca2485970c353fec5aff3e Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sat, 30 Nov 2019 23:08:49 +0100
Subject: use new POW function consistently, also in revocation

---
 src/revocation/revocation_api.c | 28 ++++------------------------
 1 file changed, 4 insertions(+), 24 deletions(-)

(limited to 'src/revocation/revocation_api.c')

diff --git a/src/revocation/revocation_api.c b/src/revocation/revocation_api.c
index fd25050e2..ea8db835f 100644
--- a/src/revocation/revocation_api.c
+++ b/src/revocation/revocation_api.c
@@ -323,29 +323,6 @@ GNUNET_REVOCATION_revoke_cancel (struct GNUNET_REVOCATION_Handle *h)
 }
 
 
-/**
- * Calculate the 'proof-of-work' hash (an expensive hash).
- *
- * @param buf data to hash
- * @param buf_len number of bytes in @a buf
- * @param result where to write the resulting hash
- */
-static void
-pow_hash (const void *buf,
-          size_t buf_len,
-          struct GNUNET_HashCode *result)
-{
-  GNUNET_break (0 ==
-                gcry_kdf_derive (buf, buf_len,
-                                 GCRY_KDF_SCRYPT,
-                                 1 /* subalgo */,
-                                 "gnunet-revocation-proof-of-work",
-                                 strlen ("gnunet-revocation-proof-of-work"),
-                                 2 /* iterations; keep cost of individual op small */,
-                                 sizeof(struct GNUNET_HashCode), result));
-}
-
-
 /**
  * Count the leading zeroes in hash.
  *
@@ -385,7 +362,10 @@ GNUNET_REVOCATION_check_pow (const struct GNUNET_CRYPTO_EcdsaPublicKey *key,
   GNUNET_memcpy (buf, &pow, sizeof(pow));
   GNUNET_memcpy (&buf[sizeof(pow)], key,
                  sizeof(struct GNUNET_CRYPTO_EcdsaPublicKey));
-  pow_hash (buf, sizeof(buf), &result);
+  GNUNET_CRYPTO_pow_hash ("gnunet-revocation-proof-of-work",
+                          buf,
+                          sizeof(buf),
+                          &result);
   return (count_leading_zeroes (&result) >=
           matching_bits) ? GNUNET_YES : GNUNET_NO;
 }
-- 
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