使用Xamarin (Mono c#)和.net生成相同的键

Question

我试图让用户输入一个引脚，然后使用公式来创建一个时间敏感的字符串。也就是说，如果你在一分钟后调用这个函数，字符串将完全不同。然后，我将这个字符串通过SHA1算法运行。我的问题是，我需要。net和Mono库产生相同的结果，他们没有。我使用Xmarin studio将mono库部署到android。我使用。net 3.5框架来部署我的web服务。

我已经确认，作为参数传递给sha1算法的两个字符串在android和。net上是相同的。问题是SHA1算法的输出是不同的。我相信这是因为它们在不同的库中是如何实现的。实际的c#代码在两个设备上是相同的。

有谁知道一个简单的算法，我可以使用，不依赖于库?或者更好的是，对我可能做错的地方提出建议。

这是我的c# 3.5 webservice的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Security.Cryptography;

namespace rasToken
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX,    uncomment the following line. 
// [System.Web.Script.Services.ScriptService]
public class Service1 : System.Web.Services.WebService
{
    [WebMethod]
    public string rasEncrypt(String userid)
    {
        //get pin from data base
        String pin = "1234";
       return generateToken(pin);
    }
    public string generateToken(String pin)
    {
        String debug="";
        int month = DateTime.Now.Month;
        debug+="month: "+month;
        int year = DateTime.Now.DayOfYear;
        debug+="year: "+year;
        int hour = DateTime.Now.Hour;
         debug+="hour: "+hour;
         int minute = DateTime.Now.Minute;
        debug+="minute: "+minute;
        int day = DateTime.Now.Day;
        debug+="day: "+day;
        int concat = month * minute * year * day * hour * 7857564;
        concat=Math.Abs(concat);
        SHA1 sh1 = SHA1.Create();
        String hash = concat + "23117345423219" + pin;
        //MD5 hasher = MD5.Create();
        byte[] result = sh1.ComputeHash(getBytes(hash));

        String final = getString(result);

       return final.Substring(0, 8)+hash;
    }
    private byte[] getBytes(String hash){
        System.Text.ASCIIEncoding  encoding=new System.Text.ASCIIEncoding();
        return encoding.GetBytes(hash);           
    }
    private String getString(byte[] bytes)
    {
        System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
        String clean = Convert.ToBase64String(bytes).Replace(@"", string.Empty);
        return clean;
        //return encoding.GetString(bytes);
    }
}
}

这是我的mono android库的代码

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using System.Security.Cryptography;
namespace raskey
{
[Activity (Label = "raskey", MainLauncher = true)]
public class Activity1 : Activity
{
    //int count = 1;
    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);
        // Set our view from the "main" layout resource
        SetContentView (Resource.Layout.Main);
        // Get our button from the layout resource,
        // and attach an event to it
        Button button = FindViewById<Button> (Resource.Id.myButton);
        EditText input = FindViewById<EditText> (Resource.Id.pin);
        //button.Click += delegate {
        //  button.Text = string.Format ("{0} clicks!", count++);
        //};
        input.KeyPress+=(object sender, View.KeyEventArgs e) => {
            if (e.Event.Action == KeyEventActions.Down && e.KeyCode == Keycode.Enter) {
                generateToken(input.Text);
                Toast.MakeText (this, generateToken(input.Text), ToastLength.Short).Show ();
                e.Handled = true;
            }
        };
    }
    public string generateToken(String pin)
    {
        String debug="";
        int month = DateTime.Now.Month;
        debug+="month: "+month;
        int year = DateTime.Now.DayOfYear;
        debug+="year: "+year;
        int hour = DateTime.Now.Hour;
        debug+="hour: "+hour;
        int minute = DateTime.Now.Minute;
        debug+="minute: "+minute;
        int day = DateTime.Now.Day;
        debug+="day: "+day;
        int concat = month * minute * year * day * hour * 7857564;
        concat=Math.Abs(concat);
        SHA1 sh1 = SHA1.Create();
        String hash = concat + "23117345423219" + pin;
        //MD5 hasher = MD5.Create();
        byte[] result = sh1.ComputeHash(getBytes(hash));

        String final = getString(result);

        return final.Substring(0, 8)+" "+hash;
    }
    private byte[] getBytes(String hash){
        System.Text.ASCIIEncoding  encoding=new System.Text.ASCIIEncoding();
        return encoding.GetBytes(hash);           
    }
    private String getString(byte[] bytes)
    {
        System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
        String clean = Convert.ToBase64String(bytes).Replace(@"", string.Empty);
        return clean;
        //return encoding.GetString(bytes);
    }
}

}

Answer 1

您的源代码对于服务器和客户端看起来不同，例如

  return final.Substring(0, 8)+hash;

和

  return final.Substring(0, 8)+" "+hash;

将返回一个不同的哈希值

对于调试，您可能希望跳过哈希部分并使用令牌来查看它们是否匹配(如果不匹配，则您知道您的问题与加密无关)。

Answer 2

我怀疑你的hash字符串不同。您应该记录它们并确保它们匹配。