加密现有的zip文件 [英] Encrypt an existing zip file

问题描述

我有一个现有的压缩文件，我想用AESManaged级加密，但我不觉得，我可以将密码设置为在类中的zip文件。经过研究，我发现了一些libaries如'DotNetZip就可以完成任务。但我的文件已经是一个.zip，我不需要再压缩，我只想加密。任何人都可以帮我用AESManaged类ahieve的目的是什么？

I have an existing zip file, I want to use AESManaged class to encrypt it, but I don't find where I can set the password to the zip file in that class. After researching, I found some libaries such as 'DotNetZip' can complete the task. But my file is already a .zip, I needn't to compress again, I only want to encrypt it. Anyone can help me to use AESManaged class to ahieve the purpose?

感谢

推荐答案

我不知道如果这是你要找的，但我创建了一个加密的文件中的代码

I don't know if this is what your are looking for but I created a code that encrypts any file.

下面是对加密器的代码：

Here's the code for the encrypter:

private void EncryptFile(string inputFile, string outputFile)
        {
            string password = @"yourPWhere";
            UnicodeEncoding UE = new UnicodeEncoding();
            byte[] key = CreateKey(password);

            string cryptFile = outputFile;
            FileStream fsCrypt = new FileStream(cryptFile, FileMode.Create);

            RijndaelManaged RMCrypto = new RijndaelManaged();
            IV = CreateIV(password_mTxtBx.Text);

            CryptoStream cs = new CryptoStream(fsCrypt,
                RMCrypto.CreateEncryptor(key,IV),
                CryptoStreamMode.Write);

            FileStream fsIn = new FileStream(inputFile, FileMode.Open);

            int data;
            while ((data = fsIn.ReadByte()) != -1)
                cs.WriteByte((byte)data);


            fsIn.Close();
            cs.Close();
            fsCrypt.Close();
        }

下面是该解密的代码：

        private void DecryptFile(string inputFile, string outputFile)
    {
            string password = @"yourPWhere";

            UnicodeEncoding UE = new UnicodeEncoding();
            byte[] key = CreateKey(password);
            FileStream fsCrypt = new FileStream(inputFile, FileMode.Open);
            RijndaelManaged RMCrypto = new RijndaelManaged();
            IV = CreateIV(password_mTxtBx.Text);

            CryptoStream cs = new CryptoStream(fsCrypt,
                RMCrypto.CreateDecryptor(key, IV),
                CryptoStreamMode.Read);

            FileStream fsOut = new FileStream(outputFile.Remove(outputFile.Length - 4), FileMode.Create);

            int data;
            while ((data = cs.ReadByte()) != -1)
                fsOut.WriteByte((byte)data);

            fsOut.Close();
            cs.Close();
            fsCrypt.Close();

        }

我看到CodeProject上的类似的代码在几个月前。因此，它不是直接我的工作。
学分转到笔者

I saw a similar code on codeproject a few months ago. So it's not directly my work. Credits go to the author.

基于口令的密钥导出更新时间：

Updated with password-based key derivation:

    public static byte[] CreateKey(string password)
    {
        var salt = new byte[] { 1, 2, 23, 234, 37, 48, 134, 63, 248, 4 };

        const int Iterations = 9872;
        using (var rfc2898DeriveBytes = new Rfc2898DeriveBytes(password, salt, Iterations))
            return rfc2898DeriveBytes.GetBytes(16);
    }

造物主为IV（从密码创建）：

Creator for the IV (created from Password):

    public byte[] CreateIV(string password)
    {
        var salt = new byte[] { 4, 7, 21, 199, 45, 63, 138, 12, 213, 1 };

        const int Iterations = 325;
        using (var rfc2898DeriveBytes = new Rfc2898DeriveBytes(password, salt, Iterations))
            return rfc2898DeriveBytes.GetBytes(16);
    }

更改盐和迭代参数，其他随机数字。

Change the salt and iteration parameters to other random numbers.

密钥的字节长度是在我的情况下，128位= 16个字节（八分之一百二十八），但你可以使用Rijndael算法（重点支持的任何其他长度（！）：128，192， 256位= 16，24，32字节）。
中的IV始终是16个字节！

The byte length of the key is in my case 128bit(!) = 16 bytes (128/8), but you can use any other length supported by Rijndael (Key: 128, 192, 256 bit = 16, 24, 32 bytes). The IV is always 16 bytes!

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