实现URL参数的加密和解密的方法 .

最新推荐文章于 2022-10-13 16:19:43 发布

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最新推荐文章于 2022-10-13 16:19:43 发布

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文章标签：解密加密 url string encryption byte

本文介绍了如何使用.NET框架中的DES加密算法对HTTP请求中的查询字符串进行加密，以提高数据传输过程中的安全性。通过提供加密和解密的代码示例，详细解释了实现过程，并展示了实际应用中的代码片段，包括加密URL和解密URL的方法。

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1、POST/GET 这个不用多说了。

2、 Encrypting QueryStrings with .NET

CODE:

C#:

using System;
using System.IO;
using System.Xml;
using System.Text;
using System.Security.Cryptography;

public class Encryption64
...{
    //private byte[] key = {};
    //private byte[] IV = {10, 20, 30, 40, 50, 60, 70, 80}; // it can be any byte value

    public static string Decrypt(string stringToDecrypt,
    string sEncryptionKey)
    ...{

        byte[] key = ...{ };
        byte[] IV = ...{ 10, 20, 30, 40, 50, 60, 70, 80 };
        byte[] inputByteArray = new byte[stringToDecrypt.Length];

        try
        ...{
            key = Encoding.UTF8.GetBytes(sEncryptionKey.Substring(0, 8));
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            inputByteArray = Convert.FromBase64String(stringToDecrypt);

            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(key, IV), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            Encoding encoding = Encoding.UTF8;
            return encoding.GetString(ms.ToArray());
        }
        catch (System.Exception ex)
        ...{
            throw ex;
        }
    }

    public static string Encrypt(string stringToEncrypt,
    string sEncryptionKey)
    ...{

        byte[] key = ...{ };
        byte[] IV = ...{ 10, 20, 30, 40, 50, 60, 70, 80 };
        byte[] inputByteArray; //Convert.ToByte(stringToEncrypt.Length)

        try
        ...{
            key = Encoding.UTF8.GetBytes(sEncryptionKey.Substring(0, 8));
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            inputByteArray = Encoding.UTF8.GetBytes(stringToEncrypt);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(key, IV), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            return Convert.ToBase64String(ms.ToArray());
        }
        catch (System.Exception ex)
        ...{
            throw ex;
        }
    }
}

VB.NET

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

Default.aspx.cs

//加密URL

protected void Page_Load(object sender, EventArgs e)
    ...{
        string strValues = "http://blog.youkuaiyun.com/slimboy123";
        string strEnURL = "Default2.aspx?url="
            + encryptQueryString(strValues);
        Response.Redirect(strEnURL);
    }

    public string encryptQueryString(string strQueryString)
    ...{
        return Encryption64.Encrypt(strQueryString, "!#$a54?3");
    }

Default2.aspx.cs

//解密URL

protected void Page_Load(object sender, EventArgs e)
    ...{
        if (Request.QueryString["url"] != null)
        ...{
            Response.Write(decryptQueryString(Request.QueryString["url"].Trim().Replace(" ","+")));
        }
    }

    public string decryptQueryString(string strQueryString)
    ...{
        return Encryption64.Decrypt(strQueryString, "!#$a54?3");
    }

http://blog.youkuaiyun.com/slimboy123/article/details/2048224