hmac256 :: SB.ByteString -> SB.ByteString -> SB.ByteString
hmac256 s m = toBytes (hmac s m :: HMAC SHA256)
hmac256 :: SB.ByteString -> SB.ByteString -> SB.ByteString
hmac256 s m = toBytes (hmac s m :: HMAC SHA256)
hmac256 s m = toBytes (hmac s m :: HMAC SHA256)