非对称加密使用一对秘钥,一个用来加密,一个用来解密,这样加密和解密花费时间就会更长长。
对称加密中加密方和解密方使用同一个密钥,加密解密的速度比较快,耗时短,适合数据比较长时的使用。
public class AESHelper
{
/// <summary>
/// 有密码的AES加密
/// </summary>
/// <param name="toEncrypt">加密字符</param>
/// <param name="key">秘钥</param>
/// <returns></returns>
public static string Encrypt(string toEncrypt, string key)
{
byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateEncryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="toDecrypt"></param>
/// <param name="key"></param>
/// <returns></returns>
public static string Decrypt(string toDecrypt, string key)
{
byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return UTF8Encoding.UTF8.GetString(resultArray);
}
}