KDF code

1 files changed, 22 insertions, 0 deletions

diff --git a/src/util/crypto_random.c b/src/util/crypto_random.c
index 0a092cdcc..14d87b1cd 100644
--- a/src/util/crypto_random.c
+++ b/src/util/crypto_random.c
@@ -76,6 +76,17 @@ GNUNET_CRYPTO_random_u32 (enum GNUNET_CRYPTO_Quality mode, uint32_t i)
       while (ret >= ul);
       return ret % i;
     }
+  else if (mode == GNUNET_CRYPTO_QUALITY_NONCE)
+    {
+      ul = UINT32_MAX - (UINT32_MAX % i);
+      do
+        {
+          gcry_create_nonce(&ret, sizeof(ret));
+        }
+      while (ret >= ul);
+
+      return ret % i;
+    }
   else
     {
       ret = i * weak_random ();
@@ -142,6 +153,17 @@ GNUNET_CRYPTO_random_u64 (enum GNUNET_CRYPTO_Quality mode, uint64_t max)
       while (ret >= ul);
       return ret % max;
     }
+  else if (mode == GNUNET_CRYPTO_QUALITY_NONCE)
+    {
+      ul = UINT64_MAX - (UINT64_MAX % max);
+      do
+        {
+          gcry_create_nonce(&ret, sizeof(ret));
+        }
+      while (ret >= ul);
+
+      return ret % max;
+    }
   else
     {
       ret = max * weak_random ();