Question

有人可以告诉我加密和解密查询字符串的最佳方法是什么？什么算法最好？对称算法，不对称算法，电子签名，或者其他我不知道的算法请帮忙

Answer 1

对于对称加密，请查看MSDN文档和示例：

System.Security.Cryptography.Aes
System.Security.Cryptography.DES
System.Security.Cryptography.RC2
System.Security.Cryptography.Rijndael
System.Security.Cryptography.TripleDES

对于非对称加密，请查看MSDN文档和示例：

System.Security.Cryptography.DSA
System.Security.Cryptography.ECDiffieHellman
System.Security.Cryptography.ECDsa
System.Security.Cryptography.RSA

示例：

你可以改变这些

static readonly string PasswordHash = "P@@Sw0rd";
static readonly string SaltKey = "S@LT&KEY";
static readonly string VIKey = "@1B2c3D4e5F6g7H8";

加密：

public static string Encrypt(string plainText)
        {
            byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);

            byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
            var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.Zeros };
            var encryptor = symmetricKey.CreateEncryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));

            byte[] cipherTextBytes;

            using (var memoryStream = new MemoryStream())
            {
                using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
                {
                    cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
                    cryptoStream.FlushFinalBlock();
                    cipherTextBytes = memoryStream.ToArray();
                    cryptoStream.Close();
                }
                memoryStream.Close();
            }
            return Convert.ToBase64String(cipherTextBytes);
        }

解密：

public static string Decrypt(string encryptedText)
        {
            byte[] cipherTextBytes = Convert.FromBase64String(encryptedText);
            byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
            var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.None };

            var decryptor = symmetricKey.CreateDecryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
            var memoryStream = new MemoryStream(cipherTextBytes);
            var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read);
            byte[] plainTextBytes = new byte[cipherTextBytes.Length];

            int decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
            memoryStream.Close();
            cryptoStream.Close();
            return Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount).TrimEnd("\0".ToCharArray());
        }

以上用法：

string strvalue=Encrypt(someid);
Response.Redirect("yourpage.aspx?id=strvalue");

在重定向页面上：

if(Request.QueryString["id"]!=null)
{
    string decryptval=Decrypt(Request.QueryString["id"].ToString());
}

View other Encryption Methods

希望这有帮助！

在asp.net中加密和解密查询字符串

1 个答案: