Description
Left Encode and friends from SHA-3's TupleHash.
Description
See NIST Special Publication 800-185: SHA-3 Derived Functions: cSHAKE, KMAC, TupleHash and ParallelHash. https://www.nist.gov/publications/sha-3-derived-functions-cshake-kmac-tuplehash-and-parallelhash Note that this does not implement TupleHash itself, though it could be used to implement TupleHash given an implementation of Keccak/SHA-3. This only implements the data-encoding portions of TupleHash, and does not directly implement any kind of cryptographic state machine.