如何加密asp.net中的查询字符串？

Question

我需要在ASP.NET中加密和解密查询字符串.

查询字符串可能如下所示:

http://www.mysite.com/report.aspx?id=12345&year=2008

我如何加密整个查询字符串,使其看起来如下所示？

http://www.mysite.com/report.aspx?crypt=asldjfaf32as98df8a

然后,当然,我如何解密它？什么是最好的加密用于这样的事情？TripleDes的？

Answer 1

这是一种在VB中执行此操作的方法来自:http://www.devcity.net/Articles/47/1/encrypt_querystring.aspx

加密代码的包装:将你的查询字符串参数传递给它,并更改密钥!

Private _key as string = "!#$a54?3"
Public Function encryptQueryString(ByVal strQueryString As String) As String
    Dim oES As New ExtractAndSerialize.Encryption64()
    Return oES.Encrypt(strQueryString, _key)
End Function

Public Function decryptQueryString(ByVal strQueryString As String) As String
    Dim oES As New ExtractAndSerialize.Encryption64()
    Return oES.Decrypt(strQueryString, _key)
End Function

加密代码:

Imports System
Imports System.IO
Imports System.Xml
Imports System.Text
Imports System.Security.Cryptography

Public Class Encryption64
    Private key() As Byte = {}
    Private IV() As Byte = {&H12, &H34, &H56, &H78, &H90, &HAB, &HCD, &HEF}

    Public Function Decrypt(ByVal stringToDecrypt As String, _
        ByVal sEncryptionKey As String) As String
        Dim inputByteArray(stringToDecrypt.Length) As Byte
         Try
            key = System.Text.Encoding.UTF8.GetBytes(Left(sEncryptionKey, 8))
            Dim des As New DESCryptoServiceProvider()
            inputByteArray = Convert.FromBase64String(stringToDecrypt)
            Dim ms As New MemoryStream()
            Dim cs As New CryptoStream(ms, des.CreateDecryptor(key, IV), _
                CryptoStreamMode.Write)
            cs.Write(inputByteArray, 0, inputByteArray.Length)
            cs.FlushFinalBlock()
            Dim encoding As System.Text.Encoding = System.Text.Encoding.UTF8
            Return encoding.GetString(ms.ToArray())
        Catch e As Exception
            Return e.Message
        End Try
    End Function

    Public Function Encrypt(ByVal stringToEncrypt As String, _
        ByVal SEncryptionKey As String) As String
        Try
            key = System.Text.Encoding.UTF8.GetBytes(Left(SEncryptionKey, 8))
            Dim des As New DESCryptoServiceProvider()
            Dim inputByteArray() As Byte = Encoding.UTF8.GetBytes( _
                stringToEncrypt)
            Dim ms As New MemoryStream()
            Dim cs As New CryptoStream(ms, des.CreateEncryptor(key, IV), _
                CryptoStreamMode.Write)
            cs.Write(inputByteArray, 0, inputByteArray.Length)
            cs.FlushFinalBlock()
            Return Convert.ToBase64String(ms.ToArray())
        Catch e As Exception
            Return e.Message
        End Try
    End Function

End Class

Answer 2

使用AES加密的C＃加密-

protected void Submit(object sender, EventArgs e)
{
    string name = HttpUtility.UrlEncode(Encrypt(txtName.Text.Trim()));
    string technology = HttpUtility.UrlEncode(Encrypt(ddlTechnology.SelectedItem.Value));
    Response.Redirect(string.Format("~/CS2.aspx?name={0}&technology={1}", name, technology));
}

AES算法加密和解密功能

private string Encrypt(string clearText)
{
    string EncryptionKey = "hyddhrii%2moi43Hd5%%";
    byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
    using (Aes encryptor = Aes.Create())
    {
        Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
        encryptor.Key = pdb.GetBytes(32);
        encryptor.IV = pdb.GetBytes(16);
        using (MemoryStream ms = new MemoryStream())
        {
            using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
            {
                cs.Write(clearBytes, 0, clearBytes.Length);
                cs.Close();
            }
            clearText = Convert.ToBase64String(ms.ToArray());
        }
    }
    return clearText;
}


private string Decrypt(string cipherText)
{
    string EncryptionKey = "hyddhrii%2moi43Hd5%%";
    cipherText = cipherText.Replace(" ", "+");
    byte[] cipherBytes = Convert.FromBase64String(cipherText);
    using (Aes encryptor = Aes.Create())
    {
        Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
        encryptor.Key = pdb.GetBytes(32);
        encryptor.IV = pdb.GetBytes(16);
        using (MemoryStream ms = new MemoryStream())
        {
            using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
            {
                cs.Write(cipherBytes, 0, cipherBytes.Length);
                cs.Close();
            }
            cipherText = Encoding.Unicode.GetString(ms.ToArray());
        }
    }
    return cipherText;
}

解密

lblName.Text = Decrypt(HttpUtility.UrlDecode(Request.QueryString["name"]));
lblTechnology.Text = Decrypt(HttpUtility.UrlDecode(Request.QueryString["technology"]));