利用ICSharpCode.SharpZipLib.dll解析 出错：“Wrong Local header signature

分析原因

利用ICSharpCode.SharpZipLib.dll解析APK时，进入APK的AndroidXml获取时出现报错

出错代码

using (ICSharpCode.SharpZipLib.Zip.ZipInputStream zip = new ICSharpCode.SharpZipLib.Zip.ZipInputStream(File.OpenRead(path))) 
{
	using (var filestream = new FileStream(path, FileMode.Open, FileAccess.Read)) 
	{
		ICSharpCode.SharpZipLib.Zip.ZipFile zipfile = new ICSharpCode.SharpZipLib.Zip.ZipFile(filestream);
		ICSharpCode.SharpZipLib.Zip.ZipEntry item;
        // 出错部分
		while ((item = zip.GetNextEntry()) != null) 
		{
			if (item.Name.ToLower() == "androidmanifest.xml") 
			{
				manifestData = new byte[50 * 1024];
				using (Stream strm = zipfile.GetInputStream(item)) 
				{
					strm.Read(manifestData, 0, manifestData.Length);
				}
			}
			if (item.Name.ToLower() == "resources.arsc") 
			{
				using (Stream strm = zipfile.GetInputStream(item)) 
				{
					using (BinaryReader s = new BinaryReader(strm)) 
					{
						resourcesData = s.ReadBytes((int)s.BaseStream.Length);
					}
				}
			}
		}
	}

解决方法

经过查阅资料，解决方法如下

using (ZipInputStream zip = new ZipInputStream(File.OpenRead(path))) 
{
	using (var filestream = new FileStream(path, FileMode.Open, FileAccess.Read)) 
	{
		System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);
		ZipFile zipfile = new ZipFile(filestream);
        // 代码更换部分
		foreach (ZipEntry entry in zipfile) 
		{
			if (entry != null) 
			{
				if (entry.Name.ToLower() == "androidmanifest.xml") 
				{
					manifestData = new byte[50 * 1024];
					Stream strm = zipfile.GetInputStream(entry);
					strm.Read(manifestData, 0, manifestData.Length);
				}
				if (entry.Name.ToLower() == "resources.arsc") 
				{
					Stream strm = zipfile.GetInputStream(entry);
					using (BinaryReader s = new BinaryReader(strm)) 
					{
						resourcesData = s.ReadBytes((int)entry.Size);
					}
				}
			}
		}
	}
}

参考链接

Wrong Local header signature: 0xFF8

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