加密cookie

Question

我尝试使用以下代码加密和解密cookie。我能够加密，但解密功能接受字节输入。我怎样才能将cookie转换为一个字节进行解密？错误是

  

无法隐式转换类型＆＃34; System.Web.HttpCookie＆＃34;到＆＃34; byte []

错误行是＆＃34; byte [] encrypted = myCookie;＆＃34;如何转换＆＃34; cookie＆＃34;在解密之前到byte []？ Enryption:

HttpCookie myCookie = new HttpCookie("co");
myCookie.Values.Add("customerId", dr["customerId"].ToString());

using (AesCryptoServiceProvider myAes = new AesCryptoServiceProvider())
{
    byte[] encrypted = AesEncryption.EncryptStringToBytes_Aes(myCookie.ToString(),    myAes.Key, myAes.IV);
}
Response.Cookies.Add(myCookie);

Decription:

HttpCookie myCookie = new HttpCookie("co");
myCookie.Values.Add("customerId", dr["customerId"].ToString());

using (AesCryptoServiceProvider myAes = new AesCryptoServiceProvider())
{
    byte[] encrypted = AesEncryption.EncryptStringToBytes_Aes(myCookie.ToString(),    myAes.Key, myAes.IV);
}
Response.Cookies.Add(myCookie);

Answer 1

我认为你要做的是加密一个值，然后在cookie中设置该值。显示的代码不会这样做。你需要做的是：

1. 加密值
2. 将加密字节转换为可打印字符串（因为cookie是纯文本），base64编码是此常用选项。
3. 在Cookie中设置该值。
4. 在响应中设置cookie。

尝试返回原始值时，向后运行相同的过程。

Answer 2

byte[] b1 = System.Text.Encoding.ASCII.GetBytes(myCookie.ToString());
string str1 = Convert.ToBase64String(b1);

byte[] b2 = Convert.FromBase64String(str1);
string str2 = System.Text.Encoding.ASCII.GetString(b2);

Answer 3

HttpCookie myCookie = new HttpCookie("co");

using (AesCryptoServiceProvider myAes = new AesCryptoServiceProvider())
{
    byte[] encrypted = AesEncryption.EncryptStringToBytes_Aes(dr["customerId"].ToString(), myAes.Key, myAes.IV);
myCookie.Values.Add("customerId", Convert.ToBase64String(encrypted));
}
Response.Cookies.Add(myCookie);

并在解密前执行相反的操作

HttpCookie myCookie = Request.Cookies["co"];
byte[] encrypted = Convert.FromBase64String(myCookie.Value);