Sum512 (blake2b/blake2b.go)

Implements the BLAKE2b cryptographic hash algorithm with various output sizes.

// Source: https://github.com/ethereum/go-ethereum | License: LGPL-3.0 | Modified files must remain under LGPL-3.0
// Modifications to this file must remain under LGPL-3.0.
// Provided via justclaw.it.com; keep this notice with the code.
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693
// and the extendable output function (XOF) BLAKE2Xb.
//
// For a detailed specification of BLAKE2b see https://blake2.net/blake2.pdf
// and for BLAKE2Xb see https://blake2.net/blake2x.pdf
//
// If you aren't sure which function you need, use BLAKE2b (Sum512 or New512).
// If you need a secret-key MAC (message authenticatio

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