BN089-BS开发框架MVC4版/source20131023/Zephyr.Net/Zephyr.Utils/Compress/Ionic/Zip/WinZipAes.cs

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//#define Trace

// WinZipAes.cs
// ------------------------------------------------------------------
//
// Copyright (c) 2009-2011 Dino Chiesa.
// All rights reserved.
//
// This code module is part of DotNetZip, a zipfile class library.
//
// ------------------------------------------------------------------
//
// This code is licensed under the Microsoft Public License.
// See the file License.txt for the license details.
// More info on: http://dotnetzip.codeplex.com
//
// ------------------------------------------------------------------
//
// last saved (in emacs):
// Time-stamp: <2011-July-12 13:42:06>
//
// ------------------------------------------------------------------
//
// This module defines the classes for dealing with WinZip's AES encryption,
// according to the specifications for the format available on WinZip's website.
//
// Created: January 2009
//
// ------------------------------------------------------------------

using System;
using System.IO;
using System.Collections.Generic;
using System.Security.Cryptography;

#if AESCRYPTO
namespace Zephyr.Utils.Ionic.Zip
{
    /// <summary>
    ///   This is a helper class supporting WinZip AES encryption.
    ///   This class is intended for use only by the DotNetZip library.
    /// </summary>
    ///
    /// <remarks>
    ///   Most uses of the DotNetZip library will not involve direct calls into
    ///   the WinZipAesCrypto class.  Instead, the WinZipAesCrypto class is
    ///   instantiated and used by the ZipEntry() class when WinZip AES
    ///   encryption or decryption on an entry is employed.
    /// </remarks>
    internal class WinZipAesCrypto
    {
        internal byte[] _Salt;
        internal byte[] _providedPv;
        internal byte[] _generatedPv;
        internal int _KeyStrengthInBits;
        private byte[] _MacInitializationVector;
        private byte[] _StoredMac;
        private byte[] _keyBytes;
        private Int16 PasswordVerificationStored;
        private Int16 PasswordVerificationGenerated;