Triple DES加密 [英] Triple DES encryption

问题描述

请注意，我有这里的问题是关键的尺寸的。首先，基于包含在下面的代码的意见，我想，我的关键需要是24个字节（192位）。这并没有工作，所以我给了16，32，和8个字节键射击 - 似乎没有任何合作。通过不工作我的意思是，经过我的文字已经被加密和解密它不持有相同的值，我的原文

Please note that the issue I am having here is with the key size. At first, based on the comments included in the below code, I figured that my key needed to be 24 bytes (192 bits). This didn't work so I gave 16, 32, and 8 byte keys a shot - nothing seems to be working. By "not working" I mean that after my text has been encrypted and decrypted it does not hold the same value as my original text.

原始文本： 示例测试这应该工作

加密后的文本：¸¹pÕô6

解密文本： 样本

下面是两个函数我我使用（加密/解密功能）。我也包括我怎么打电话各项功能。

Here are the two functions I am using (Encrypt / Decrypt functions). Also I will include how I am calling each function.

        // 168-bit (three-key) 3DES (Triple-DES) encrypt a single 8-byte block (ECB mode)
        // plain-text should be 8-bytes, key should be 24 bytes.
        public byte[] TripleDesEncryptOneBlock(byte[] plainText, byte[] key)
        {
            // Create a new 3DES key.
            TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();

            // Set the KeySize = 192 for 168-bit DES encryption.
            // The msb of each byte is a parity bit, so the key length is actually 168 bits.

            des.KeySize = 192;
            des.Key = key;
            des.Mode = CipherMode.ECB;
            des.Padding = PaddingMode.None;

            ICryptoTransform ic = des.CreateEncryptor();

            byte[] enc = ic.TransformFinalBlock(plainText, 0, 8);

            return enc;
        }

        public byte[] TripleDesDecryptBlock(byte[] plainText, byte[] key)
        {
            // Create a new 3DES key.
            TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();

            // Set the KeySize = 192 for 168-bit DES encryption.
            // The msb of each byte is a parity bit, so the key length is actually 168 bits.
            des.KeySize = 192;
            des.Key = key;
            des.Mode = CipherMode.ECB;
            des.Padding = PaddingMode.None;

            ICryptoTransform ic = des.CreateDecryptor();

            byte[] dec = ic.TransformFinalBlock(plainText, 0, 8);

            return dec;
        }

// Encrypt Text
textBox5.Text = ByteToString(TripleDesEncryptOneBlock(StringToByte(textBox5.Text), StringToByte("1 2 3 4 5 6 7 8 9 1 1 2 ")));

// Decrypt Text
textBox5.Text = ByteToString(TripleDesDecryptBlock(StringToByte(textBox5.Text), StringToByte("1 2 3 4 5 6 7 8 9 1 1 2 ")));

感谢您的帮助，

埃文

推荐答案

使用这样的：

字节[] = ENC ic.TransformFinalBlock（明文，0，plainText.Length）;

我希望这将加密/解密您的整个字符串。你也不用这种方法多次调用

I hope it will encrypt/decrypt your whole string. Also you will need not to call this method multiple times

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