3-DES algorithm use for Card number in asp.net c#
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User-893317190 posted
Hi Alauddin Dipu,
You could use AES to encrypt and decrypt your card number.
Below is a small sample.
//the first parameter is your card number , the second parameter is the key,
//the last parameter is the file path where you want to save your encrypted card number
public static void Encrypt(string plainText, string password,string outputFilePath) { byte[] salt1 = new byte[] { 0x49, 0x76, 0x61, 0x6E, 0x20, 0x4D, 0x65, 0x64 }; string data = plainText; Rfc2898DeriveBytes k1 = new Rfc2898DeriveBytes(password, salt1); Aes encryptor = Aes.Create(); encryptor.KeySize = 128; encryptor.BlockSize = 128; encryptor.Key = k1.GetBytes(128 / 8); encryptor.IV = k1.GetBytes(128 / 8); FileStream fsinput = new FileStream(outputFilePath, FileMode.Open); CryptoStream encrypt = new CryptoStream(fsinput, encryptor.CreateEncryptor(), CryptoStreamMode.Write); byte[] utfd1 = new System.Text.UTF8Encoding(false).GetBytes(data); encrypt.Write(utfd1, 0, utfd1.Length); encrypt.FlushFinalBlock(); encrypt.Close(); } // the first parameter is the file path where your store your encrypted card number , the second parameter is the file path
// where you want to save your decrpyted card number, the last parameter is the key public static void Decrypt(string inputFilePath, string outputfilePath, string pwd) { byte[] salt1 = new byte[] { 0x49, 0x76, 0x61, 0x6E, 0x20, 0x4D, 0x65, 0x64 }; Rfc2898DeriveBytes k2 = new Rfc2898DeriveBytes(pwd, salt1); Aes descrypt = Aes.Create(); descrypt.KeySize = 128; descrypt.BlockSize = 128; descrypt.Key = k2.GetBytes(128 / 8); descrypt.IV = k2.GetBytes(128 / 8); FileStream fsOutput = new FileStream(outputfilePath, FileMode.Open); CryptoStream dec = new CryptoStream(fsOutput, descrypt.CreateDecryptor(), CryptoStreamMode.Write); byte[] edata = File.ReadAllBytes(inputFilePath); dec.Write(edata, 0, edata.Length); dec.Flush(); dec.Close(); }My test code.
protected void Page_Load(object sender, EventArgs e) { EncryptDecryptUtil.Encrypt("5441191000005226", "F8660BF9063B1BBEFEA2BC413C8514FE", Server.MapPath("/csharpDemo2/code.txt")); EncryptDecryptUtil.Decrypt(Server.MapPath("/csharpDemo2/code.txt"), Server.MapPath("/csharpDemo2/result.txt"), "F8660BF9063B1BBEFEA2BC413C8514FE"); }The result.
Best regards,
Ackerly Xu
