这是我编写的加密/解密字符串的代码,加密后的字符串经过Base64编码,以便于序列化到XML等文件中。你可以轻松地将此代码转换为直接处理字节数组而不是字符串的形式。
private static SymmetricAlgorithm GetAlgorithm(string password)
{
var algorithm = Rijndael.Create();
var rdb = new Rfc2898DeriveBytes(password, new byte[] {
0x53,0x6f,0x64,0x69,0x75,0x6d,0x20,
0x43,0x68,0x6c,0x6f,0x72,0x69,0x64,0x65
});
algorithm.Padding = PaddingMode.ISO10126;
algorithm.Key = rdb.GetBytes(32);
algorithm.IV = rdb.GetBytes(16);
return algorithm;
}
public static string EncryptString(string clearText, string password)
{
var algorithm = GetAlgorithm(password);
var encryptor = algorithm.CreateEncryptor();
var clearBytes = Encoding.Unicode.GetBytes(clearText);
using (var ms = new MemoryStream())
using (var cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
return Convert.ToBase64String(ms.ToArray());
}
}
public static string DecryptString(string cipherText, string password)
{
var algorithm = GetAlgorithm(password);
var decryptor = algorithm.CreateDecryptor();
var cipherBytes = Convert.FromBase64String(cipherText);
using (var ms = new MemoryStream())
using (var cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
return Encoding.Unicode.GetString(ms.ToArray());
}
}