diff options
Diffstat (limited to 'Tunables.hs')
| -rw-r--r-- | Tunables.hs | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/Tunables.hs b/Tunables.hs index 1d087bf..5c28a39 100644 --- a/Tunables.hs +++ b/Tunables.hs @@ -142,17 +142,21 @@ knownObjectSizes = map (calc . snd) knownTunings calc t = objectSize t * shareOverhead t -- Hash for client-server Proof Of Work. This is tuned to take around --- 4 seconds to calculate the hash on a 4 core machine, with 0 added --- iterations. Adding more iterations will increase that somewhat. +-- 4 seconds to calculate the hash 256 times on a 4 core machine, with +-- 0 added iterations. Adding more iterations will increase that somewhat. -- -- This is not included in Tunables because it doesn't affect object --- encryption and storage. +-- encryption and storage. Any change to this will break backwards +-- compatability of the HTTP protocol! proofOfWorkHashTunable :: Word32 -> ExpensiveHashTunable proofOfWorkHashTunable addits = - UseArgon2 (CPUCost (Seconds (4 + (4 * fromIntegral addits `div` 20))) (Divisibility 4)) $ + UseArgon2 (CPUCost (Seconds nsecs) (Divisibility 4)) $ Argon2.HashOptions - { Argon2.hashIterations = 20 + addits - , Argon2.hashMemory = 131072 -- 128 mebibtyes per thread + { Argon2.hashIterations = nits + , Argon2.hashMemory = 1000 , Argon2.hashParallelism = 4 , Argon2.hashVariant = Argon2.Argon2i } + where + nits = 20 + addits + nsecs = (4 * fromIntegral nits / 20) / 256 |