--- /dev/null
+--- Cryptographical Hash and HMAC object.
+-- @cstyle instance
+module "nixio.CryptoHash"
+
+--- Add another chunk of data to be hashed.
+-- @class function
+-- @name CryptoHash.update
+-- @param chunk Chunk of data
+-- @return CryptoHash object (self)
+
+--- Finalize the hash and return the digest.
+-- @class function
+-- @name CryptoHash.final
+-- @usage You cannot call update on a hash object that was already finalized
+-- you can however call final multiple times to get the digest.
+-- @return hexdigest
+-- @return buffer containing binary digest
\ No newline at end of file