An object that provides a checksum of data provided in chunks to
The checksum may be performed incrementally as chunks are received or all
at once when the checksum is finalized, depending on the underlying
It's recommended to compute checksum incrementally to avoid reading the
entire payload in memory.
A class that implements this interface may accept an optional secret key in its
constructor while computing checksum value, when using HMAC. If provided,
this secret key would be used when computing checksum.
Constant length of the digest created by the algorithm in bytes.
Creates a new checksum object that contains a deep copy of the internal
state of the current
Returns the digest of all of the data passed.
Allows marking a checksum for checksums that support the ability to mark and reset.
The maximum limit of bytes that can be read before the mark position becomes invalid.
Resets the checksum to its initial value.
Adds a chunk of data for which checksum needs to be computed. This can be called many times with new data as it is streamed.
Implementations may override this method which passes second param which makes Checksum object stateless.
The buffer to update checksum with.