原文地址：http://blog.sina.com.cn/s/blog_94000f52010126dv.html
/// <summary>
/// 使用AES加密字符串
/// </summary>
/// <param name="encryptString">待加密字符串</param>
/// <param name="encryptKey">加密密匙</param>
/// <param name="salt">盐</param>
/// <returns>加密结果，加密失败则返回源串</returns>
public static string EncryptAES(string encryptString, string encryptKey, string salt)
{
AesManaged aes = null;
MemoryStream ms = null;
CryptoStream cs = null;
try
{
Rfc2898DeriveBytes rfc2898 = new Rfc2898DeriveBytes(encryptKey, Encoding.UTF8.GetBytes(salt));
aes = new AesManaged();
aes.Key = rfc2898.GetBytes(aes.KeySize / 8);
aes.IV = rfc2898.GetBytes(aes.BlockSize / 8);
ms = new MemoryStream();
cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write);
byte[] data = Encoding.UTF8.GetBytes(encryptString);
cs.Write(data, 0, data.Length);
cs.FlushFinalBlock();
return Convert.ToBase64String(ms.ToArray());
}
catch
{
return encryptString;
}
finally
{
if (cs != null)
cs.Close();
if (ms != null)
ms.Close();
if (aes != null)
aes.Clear();
}
}
/// <summary>
/// 使用AES解密字符串
/// </summary>
/// <param name="decryptString">待解密字符串</param>
/// <param name="decryptKey">解密密匙</param>
/// <param name="salt">盐</param>
/// <returns>解密结果，解谜失败则返回源串</returns>
public static string DecryptAES(string decryptString, string decryptKey, string salt)
{
AesManaged aes = null;
MemoryStream ms = null;
CryptoStream cs = null;
try
{
Rfc2898DeriveBytes rfc2898 = new Rfc2898DeriveBytes(decryptKey, Encoding.UTF8.GetBytes(salt));
aes = new AesManaged();
aes.Key = rfc2898.GetBytes(aes.KeySize / 8);
aes.IV = rfc2898.GetBytes(aes.BlockSize / 8);
ms = new MemoryStream();
cs = new CryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Write);
byte[] data = Convert.FromBase64String(decryptString);
cs.Write(data, 0, data.Length);
cs.FlushFinalBlock();
return Encoding.UTF8.GetString(ms.ToArray(), 0, ms.ToArray().Length);
}
catch
{
return decryptString;
}
finally
{
if (cs != null)
cs.Close();
if (ms != null)
ms.Close();
if (aes != null)
aes.Clear();
}
}