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// Copyright 2014 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//      http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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 * @fileoverview SHA-512 cryptographic hash.
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 *
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 * Usage:
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 *   var sha512 = new goog.crypt.Sha512();
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 *   sha512.update(bytes);
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 *   var hash = sha512.digest();
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 *
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 * @author [email protected] (Frank Yellin)
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 */
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goog.provide('goog.crypt.Sha512');
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goog.require('goog.crypt.Sha2_64bit');
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/**
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 * Constructs a SHA-512 cryptographic hash.
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 *
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 * @constructor
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 * @extends {goog.crypt.Sha2_64bit}
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 * @final
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 * @struct
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 */
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goog.crypt.Sha512 = function() {
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  goog.crypt.Sha512.base(
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      this, 'constructor', 8 /* numHashBlocks */,
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      goog.crypt.Sha512.INIT_HASH_BLOCK_);
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};
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goog.inherits(goog.crypt.Sha512, goog.crypt.Sha2_64bit);
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/** @private {!Array<number>} */
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goog.crypt.Sha512.INIT_HASH_BLOCK_ = [
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  // Section 5.3.5 of
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  // csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
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  0x6a09e667, 0xf3bcc908,  // H0
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  0xbb67ae85, 0x84caa73b,  // H1
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  0x3c6ef372, 0xfe94f82b,  // H2
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  0xa54ff53a, 0x5f1d36f1,  // H3
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  0x510e527f, 0xade682d1,  // H4
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  0x9b05688c, 0x2b3e6c1f,  // H5
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  0x1f83d9ab, 0xfb41bd6b,  // H6
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  0x5be0cd19, 0x137e2179   // H7
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];
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