HomeSYNOPSIS
data = hash:finish()
DESCRIPTION
The Core4 system includes a copy of mbed TLS.
Completes a hash calculation and returns the result as a string.
The object hash must have been properly initialized with a supported algorithm.
When the result has been retrieved, the internal object state is cleared. The next call to hash:update() will be processed as if the object had just been initialized.
RETURN VALUE
On success, returns a data string.
On failure, returns nil, a string describing the error and the mbedtls error code number.