PHP to C# conversion

I have this PHP code to compute a ticket# based on someone's ID and the current time.
I need a C# version of this. Can anyone help out?

$Cust_ID = "1158341";
$reftime = mktime(0,0,0,12,31,1973);
$preticket = floor((time()-$reftime)/(3600*24*7))*$Cust_ID;
$ticket = 'f' . dechex($Cust_ID) . md5($preticket);
echo $ticket;

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Eddie ShipmanAll-around developerAsked:
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Eddie ShipmanConnect With a Mentor All-around developerAuthor Commented:
Here is final code:
    using System;
    using System.Collections.Generic;
    using System.Text;
    using System.Text.RegularExpressions;
    using System.Security.Cryptography;
    .
    .
    .
    public static void Main()
    {
         var ticket = getLogonTicket("1007945");
         Console.WriteLine(ticket);                   
    }
    static string getLogonTicket(string Cust_ID)
    {
        int iCust_ID;
        if (!int.TryParse(Cust_ID,out iCust_ID))
            return "";
        
        var weeks = (DateTime.Now - new DateTime(1973, 12, 31)).Days/7;
        var pre_ticket = weeks * iCust_ID;
        return ("f" + iCust_ID.ToString("X") + DoubleToMD5(pre_ticket)).ToLower();
    }
    static string DoubleToMD5(double Value)
    {
        var md5 = new MD5CryptoServiceProvider();
        var bytehash = md5.ComputeHash(ASCIIEncoding.Default.GetBytes(Value.ToString()));
        return BitConverter.ToString(bytehash).Replace("-","");
    }

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0
 
Eddie ShipmanAll-around developerAuthor Commented:
For reference, this produces the same output...

static void Main(string[] args)
{
    string Cust_ID = "1158341";
    int reftime = ConvertToUnixTimestamp(new DateTime(1973, 12, 31));
    int now = (int)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds;
    string preticket = (Math.Floor(Convert.ToDouble(now - reftime) / Convert.ToDouble(3600 * 24 * 7)) * Int32.Parse(Cust_ID)).ToString();
    string hexval = Int32.Parse(Cust_ID).ToString("X");
    string ticket = string.Concat("f", hexval, MD5Hash(preticket)).ToLower();
    Console.WriteLine(ticket);
    Console.ReadKey();

}
static int ConvertToUnixTimestamp(DateTime date)
{
    DateTime origin = new DateTime(1970, 1, 1, 0, 0, 0, 0);
    TimeSpan diff = date - origin;
    return (int)diff.TotalSeconds;
}
public static string MD5Hash(string text)
{
    System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
    return System.Text.RegularExpressions.Regex.Replace(BitConverter.ToString(md5.ComputeHash(ASCIIEncoding.Default.GetBytes(text))), "-", "");
}

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0
 
käµfm³d 👽Connect With a Mentor Commented:
Untested, but it should be along these lines:

using System;
using System.Security.Cryptography;
using System.Text;

...

MD5 md5 = MD5.Create();
DateTime reftime = new DateTime(1973, 12, 31);
Double preticket = Math.Floor((DateTime.Now - reftime) / (3600*24*7).TotalSeconds) * Cust_ID;
string preticketStr = preticket.ToString();
byte[] preticketBytes = Encoding.ASCII.GetBytes(preticketStr);
byte[] hashBytes = md5.ComputeHash(preticketBytes);
string ticket = "f" + Convert.ToString(Cust_ID, 16) + Convert.ToBase64String(hashBytes);

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Eddie ShipmanAll-around developerAuthor Commented:
Looks OK, kaufmed but I get these in VS2010:
Error	1	'int' does not contain a definition for 'TotalSeconds' 
  and no extension method 'TotalSeconds' accepting a first argument of type 'int' could be found 
  (are you missing a using directive or an assembly reference?)
Error	2	The best overloaded method match for 'System.Convert.ToString(object, System.IFormatProvider)' 
  has some invalid arguments	
Error	3	Argument 2: cannot convert from 'int' to 'System.IFormatProvider'

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Eddie ShipmanAll-around developerAuthor Commented:
Self Answered
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