SharpZipLib 解密

Question

有用过SharpZipLib的兄弟吗？
不加密，解密没问题。加密后，用代码解密失败，提示：Entry compressed size 11 too small for encryption
手工解密也失败。

Answer 1

贴出你的代码。。用过 SharpZipLib 压缩和解压缩。没有用过加密和解密功能。

Answer 2

参考下这个 http://www.cnblogs.com/china-liuyang/articles/1198585.html
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博客平台：www.cnopenblog.com

Answer 3

        /// <summary> 
        /// 解压缩一个 zip 文件。 
        /// </summary> 
        /// <param name="zipFileName">要解压的 zip 文件。</param> 
        /// <param name="extractLocation">zip 文件的解压目录。</param> 
        /// <param name="password">zip 文件的密码。</param> 
        /// <param name="overWrite">是否覆盖已存在的文件。</param> 
        public static void UnZip(string zipedFile, string strDirectory, string password, bool overWrite)
        {            if (strDirectory == "")
                strDirectory = Directory.GetCurrentDirectory();
            if (!strDirectory.EndsWith("\\"))
                strDirectory = strDirectory + "\\";            using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipedFile)))
            {
                s.Password = password;
                ZipEntry theEntry;                                while ((theEntry = s.GetNextEntry()) != null)
                {
                    string directoryName = "";
                    string pathToZip = "";
                    pathToZip = theEntry.Name;                    if (pathToZip != "")
                        directoryName = Path.GetDirectoryName(pathToZip) + "\\";                    string fileName = Path.GetFileName(pathToZip);                    Directory.CreateDirectory(strDirectory + directoryName);                    if (fileName != "")
                    {
                        if ((File.Exists(strDirectory + directoryName + fileName) && overWrite) || (!File.Exists(strDirectory + directoryName + fileName)))
                        {
                            using (FileStream streamWriter = File.Create(strDirectory + directoryName + fileName))
                            {
                                int size = 2048;
                                byte[] data = new byte[2048];
                                while (true)
                                {
                                    size = s.Read(data, 0, data.Length);                                    if (size > 0)
                                        streamWriter.Write(data, 0, size);
                                    else
                                        break;
                                }
                                streamWriter.Close();
                            }
                        }
                    }
                }                s.Close();
            }
        }

Answer 4

// SharpZipLibrary samples
// Copyright (c) 2007, AlphaSierraPapa
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// - Redistributions of source code must retain the above copyright notice, this list
//   of conditions and the following disclaimer.
//
// - Redistributions in binary form must reproduce the above copyright notice, this list
//   of conditions and the following disclaimer in the documentation and/or other materials
//   provided with the distribution.
//
// - Neither the name of the SharpDevelop team nor the names of its contributors may be used to
//   endorse or promote products derived from this software without specific prior written
//   permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS &AS IS& AND ANY EXPRESS
// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.using System;
using System.Text;
using System.Collections;
using System.IO;using ICSharpCode.SharpZipLib.Zip;class MainClass
{
static public void Main(string[] args)
{
if ( args.Length < 1 ) {
Console.WriteLine("Usage: ZipList file");
return;
}

if ( !File.Exists(args[0]) ) {
Console.WriteLine("Cannot find file");
return;
}

using (ZipFile zFile = new ZipFile(args[0])) {
Console.WriteLine("Listing of : " + zFile.Name);
Console.WriteLine("");
Console.WriteLine("Raw Size    Size      Date     Time     Name");
Console.WriteLine("--------  --------  --------  ------  ---------");
foreach (ZipEntry e in zFile) {
DateTime d = e.DateTime;
Console.WriteLine("{0, -10}{1, -10}{2}  {3}   {4}", e.Size, e.CompressedSize,
                                                    d.ToString("dd-MM-yy"), d.ToString("HH:mm"),
                                                    e.Name);
}
}
}
}

Answer 5

        /// <summary> 
        /// 解压缩文件(压缩文件中含有子目录) 
        /// </summary> 
        /// <param name="zipfilepath">待解压缩的文件路径 </param> 
        /// <param name="unzippath">解压缩到指定目录 </param> 
        /// <returns>解压后的文件列表 </returns> 
        public List <string> UnZip(string zipfilepath, string unzippath) 
        { 
            //解压出来的文件列表 
            List <string> unzipFiles = new List <string>();             //检查输出目录是否以“\\”结尾 
            if (unzippath.EndsWith("\\")==false||unzippath.EndsWith(":\\")==false) 
            { 
                unzippath += "\\"; 
            }             ZipInputStream s = new ZipInputStream(File.OpenRead(zipfilepath)); 
            ZipEntry theEntry; 
            while ((theEntry = s.GetNextEntry()) != null) 
            { 
                string directoryName = Path.GetDirectoryName(unzippath); 
                string fileName = Path.GetFileName(theEntry.Name);                 //生成解压目录【用户解压到硬盘根目录时，不需要创建】 
                if (!string.IsNullOrEmpty(directoryName)) 
                { 
                    Directory.CreateDirectory(directoryName); 
                }                 if (fileName != String.Empty) 
                { 
                    //如果文件的压缩后大小为0那么说明这个文件是空的,因此不需要进行读出写入 
                    if (theEntry.CompressedSize == 0) 
                        break; 
                    //解压文件到指定的目录 
                    directoryName = Path.GetDirectoryName(unzippath + theEntry.Name); 
                    //建立下面的目录和子目录 
                    Directory.CreateDirectory(directoryName); 
                    
                    //记录导出的文件 
                    unzipFiles.Add(unzippath + theEntry.Name);                     FileStream streamWriter = File.Create(unzippath + theEntry.Name);                     int size = 2048; 
                    byte[] data = new byte[2048]; 
                    while (true) 
                    { 
                        size = s.Read(data, 0, data.Length); 
                        if (size > 0) 
                        { 
                            streamWriter.Write(data, 0, size); 
                        } 
                        else 
                        { 
                            break; 
                        } 
                    } 
                    streamWriter.Close(); 
                } 
            } 
            s.Close();             return unzipFiles; 
        } 
    } }

Answer 6

// SharpZipLibrary samples
// Copyright (c) 2007, AlphaSierraPapa
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// - Redistributions of source code must retain the above copyright notice, this list
//   of conditions and the following disclaimer.
//
// - Redistributions in binary form must reproduce the above copyright notice, this list
//   of conditions and the following disclaimer in the documentation and/or other materials
//   provided with the distribution.
//
// - Neither the name of the SharpDevelop team nor the names of its contributors may be used to
//   endorse or promote products derived from this software without specific prior written
//   permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS &AS IS& AND ANY EXPRESS
// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.using System;
using System.Text;
using System.Collections;
using System.IO;using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
class MainClass
{
public static void Main(string[] args)
{
// Perform simple parameter checking.
if ( args.Length < 1 ) {
Console.WriteLine("Usage UnzipFile NameOfFile");
return;
}

if ( !File.Exists(args[0]) ) {
Console.WriteLine("Cannot find file '{0}'", args[0]);
return;
} using (ZipInputStream s = new ZipInputStream(File.OpenRead(args[0]))) {

ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null) {

Console.WriteLine(theEntry.Name);

string directoryName = Path.GetDirectoryName(theEntry.Name);
string fileName      = Path.GetFileName(theEntry.Name);

// create directory
if ( directoryName.Length > 0 ) {
Directory.CreateDirectory(directoryName);
}

if (fileName != String.Empty) {
using (FileStream streamWriter = File.Create(theEntry.Name)) {

int size = 2048;
byte[] data = new byte[2048];
while (true) {
size = s.Read(data, 0, data.Length);
if (size > 0) {
streamWriter.Write(data, 0, size);
} else {
break;
}
}
                        streamWriter.Close();
}
}
}
}
}
}

Answer 7

这是压缩。   /// <summary> 
        /// 压缩多层目录 
        /// </summary> 
        /// <param name="strFile">压缩目录</param> 
        /// <param name="s">压缩文件流</param> 
        /// <param name="staticFile"></param> 
        public static void ZipFileDirectory(string strDirectory, string zipedFile)
        {
            using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile))
            {
                using (ZipOutputStream s = new ZipOutputStream(ZipFile))
                {
                    s.Password = "aaaaa";
                    ZipSetp(strDirectory, s, "");
                }
            }
        }        /// <summary> 
        /// 递归遍历目录 
        /// </summary> 
        /// <param name="strFile"></param> 
        /// <param name="s"></param> 
        /// <param name="parentPath"></param> 
        private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath)
        {
            if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar)
            {
                strDirectory += Path.DirectorySeparatorChar;
            }            Crc32 crc = new Crc32();            string[] filenames = Directory.GetFileSystemEntries(strDirectory);            foreach (string file in filenames)// 遍历所有的文件和目录 
            {                if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件 
                {
                    ZipSetp(file, s, file.Substring(file.LastIndexOf("\\") + 1) + "\\");
                }                else // 否则直接压缩文件 
                {
                    //打开压缩文件 
                    using (FileStream fs = File.OpenRead(file))
                    {                        byte[] buffer = new byte[fs.Length];
                        fs.Read(buffer, 0, buffer.Length);                        string fileName = parentPath + file.Substring(file.LastIndexOf("\\") + 1);
                        ZipEntry entry = new ZipEntry(fileName);                        entry.DateTime = DateTime.Now;
                        entry.Size = fs.Length;                        fs.Close();                        crc.Reset();
                        crc.Update(buffer);                        entry.Crc = crc.Value;
                        s.PutNextEntry(entry);                        s.Write(buffer, 0, buffer.Length);
                    }
                }
            }
        }

Answer 8

SharpZipLib 不是有例子吗
我上面就是他们给的列子