Security :: MD5 Hash Dropping Zeros?
Apr 23, 2010
I need to pass some info to a 3rd party (for tracking) and they require I provide a checksum value which is an md5 hashed amalgamation of some of the other values. This is my code :
[Code]....
They keep rejecting my checksum. When I have tested for the following value passed in preConvert - 300265215063.79 I get :
My code gives : ED4463C84DE9D21B54C4E62F2D72CE
An online MD5 hash gives : 0ed40463c84de9d21b54c4e62f2d72ce
Which apart from the case, is exactly the same apart from missing 2 zeroes.
View 1 Replies
Similar Messages:
May 19, 2010
Hopefully someone knows a way to fix this issue, but here is my problem. I need to be able to recreate a md5 hash that will be the equivalent of the hash that php would generate.
The encoding I have tried is listed below. None of these will produce the same values.
UnicodeEncoding
UTF7Encoding
UTF8Encoding
UTF32Encoding
View 6 Replies
Feb 15, 2010
i m trying to change my password. the password in database is in hash formatting. the class FormsAuthentication. is using for hash conversion. the password is indicating the same in if condition. but after if applying it suddenly go on else part , even the value on if condition is same.
View 2 Replies
Mar 4, 2010
I am here to generate a unique pin no of fixed length. All my previously generate pin no are stored in database and i want newly generated pin no to be unique.
I want to combine serial no and custom key and generate unique pin no.
View 1 Replies
Sep 27, 2010
i am encrypting textbox value in md5 using this coding and passing as querystring , and on other page i want to decrypt.....
[code]....
View 1 Replies
Apr 22, 2010
Is there a in built function in ASP.NET to hash passwords??
View 5 Replies
Oct 1, 2010
I am rewriting my PHP website into C# .NET, and I need to be able to set the algorithm used by the CreateUserWizard / Membership Provider to SHA1 so that I can port all of the user accounts over without having to force them all to reset their passwords when this project is complete. At current glance it doesn't look like it is using SHA-1, and my Googlefoo is failing me.
View 1 Replies
Nov 15, 2010
I am trying to insert a string and random number into the database as hash sha1 then loggin in against it. the problem is if I use hash it wont login but if i dont use hash the login works fine... Code below.
insert hash into db
Dim user As New Label
user.Visible = False
user.Text = (myDataReader2.Item("username"))
MyConnection2.Close()
Dim MyConnection3 As New Data.SqlClient.SqlConnection("Data Source=xxx")
Dim mycommand3 As New Data.SqlClient.SqlCommand("Update Register SET [Password] = @password WHERE [username] = '" & user.Text & "' AND [email] = '" & email.Text & "'", MyConnection3)
Dim pass As String
Dim rnd As Integer, randomNum As New Random
rnd = randomNum.Next(1000, 10000)
pass = "Pass" & rnd
mycommand3.Parameters.AddWithValue("@password", FormsAuthentication.HashPasswordForStoringInConfigFile(pass, "SHA1"))
MyConnection3.Open()
mycommand3.ExecuteNonQuery()
login page
Sub Application_AuthenticateRequest(ByVal sender As Object, ByVal e As EventArgs)
' Fires upon attempting to authenticate the use
If Not (HttpContext.Current.User Is Nothing) Then
If HttpContext.Current.User.Identity.IsAuthenticated Then
If TypeOf HttpContext.Current.User.Identity Is FormsIdentity Then
Dim fi As FormsIdentity = CType(HttpContext.Current.User.Identity, FormsIdentity)
Dim fat As FormsAuthenticationTicket = fi.Ticket
Dim astrRoles As String() = fat.UserData.Split("|"c)
HttpContext.Current.User = New GenericPrincipal(fi, astrRoles)
End If
End If
End If
End Sub
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Dim myConnection As New SqlClient.SqlConnection
Dim myCommand As New SqlClient.SqlCommand
Dim intUserCount As Integer
Dim strSQL As String
myConnection = New SqlClient.SqlConnection("Data Source=jrome2.db.4961680.hostedresource.com; Initial Catalog=jrome2; User ID=jrome2; Password=Richard050283;")
strSQL = "SELECT COUNT(*) FROM Register " _
& "WHERE UserName='" & Replace(txtusername.Text, "'", "''") & "' " _
& "AND Password='" & Replace(txtpassword.Text, "'", "''") & "';"
myCommand = New SqlClient.SqlCommand(strSQL, myConnection)
myConnection.Open()
intUserCount = myCommand.ExecuteScalar()
myConnection.Close()
'Response.Write(intUserCount)
If intUserCount > 0 Then
FormsAuthentication.Initialize()
Dim strRole As String = AssignRoles(txtusername.Text)
'The AddMinutes determines how long the user will be logged in after leaving
'the site if he doesn't log off.
Dim fat As FormsAuthenticationTicket = New FormsAuthenticationTicket(1, _
txtusername.Text, DateTime.Now, _
DateTime.Now.AddMinutes(30), False, strRole, _
FormsAuthentication.FormsCookiePath)
Response.Cookies.Add(New HttpCookie(FormsAuthentication.FormsCookieName, _
FormsAuthentication.Encrypt(fat)))
Response.Redirect(FormsAuthentication.GetRedirectUrl(txtusername.Text, False))
Else
login.Text = "Incorrect Log In Information"
End If
End Sub
Private Function ValidateUser(ByVal strUsername As String, ByVal strPassword As String) _
As Boolean
'Return true if the username and password is valid, false if it isn't
Return CBool(strUsername = " & Replace(txtusername.Text, " AndAlso strPassword = " & Replace(txtpassword.Text, ")
End Function
Private Function AssignRoles(ByVal strUsername As String) As String
Dim myConnection As New SqlClient.SqlConnection
Dim myCommand As New SqlClient.SqlCommand
Dim intUserCount As Integer
Dim strSQL As String
myConnection = New SqlClient.SqlConnection("Data Source=jrome2.db.4961680.hostedresource.com; Initial Catalog=jrome2; User ID=jrome2; Password=Richard050283;")
strSQL = "SELECT COUNT(*) FROM Register " _
& "WHERE UserName='" & Replace(txtusername.Text, "'", "''") & "' " _
& "AND Password='" & Replace(txtpassword.Text, "'", "''") & "';"
myCommand = New SqlClient.SqlCommand(strSQL, myConnection)
myConnection.Open()
intUserCount = myCommand.ExecuteScalar()
myConnection.Close()
'Response.Write(intUserCount)
If intUserCount > 0 Then
Return "client"
Else
Return String.Empty
End If
End Function
Protected Sub LinkButton1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
txtusername.Text = String.Empty
txtpassword.Text = String.Empty
End Sub
View 1 Replies
Jan 14, 2010
I am tasked with a project to convert words from strings to numbers . I have to do this while ensuring collision-avoidance. i.e training -> 10232323
We are storing the numbers in a database and when we retrieve the records from the database, we will reverse hash and convert the number back to a string
10232323 -> training
As you might have guessed - this is not an area that I am familiar with. I researched the overridable System.Object.GetHashCode() method, but Microsoft warns that there is little guarantee that the default implementation of GetHashCode() avoids collisions.
So I am left stuck. I would like to create an algorithm, but I have no idea where to start.
Also, the function should accept unicode characters - in the event the company decides to internationalize.
View 8 Replies
Mar 29, 2011
I am working on a database with about twenty tables. In one of the tables "Customers" their is a column with
a primary key. Call it "CustomerNumber".
The problem is that we log customers from multiple vendors and so we might have the same customer number, but from different vendors. So really this would be a perfect situation where we could set up the primary key to be a composite key consisting of the Vendor and CustomerNumber combination.
The integrity of the database is not very well maintained because the Primary Key CustomerId is never used as a secondary key in any of the other tables.
So here is my question. Instead of making a primary composite key, can I just drop the primary key all together?
This is one of those questions I really hate to ask, because typically I would never lean tword this drastic of a measure to solve a problem. Because of other situations I can't discuss this might be the best alternative. So would it be okay to drop the primary key constraint all together?
View 1 Replies
Aug 2, 2012
I am currently working on an ASP.NET v4.0 project using VB Script for the server-side code. I have a number of session variables that I am using across multiple pages. My problem is that although I have set the session timeout to be 20 minutes or longer (programmatically, in Web.Config, and IIS), the Session variables are being dumped after exactly 2 minutes.
Web.config contents:
Code:
Session_Start routine:
Code:
Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
' Fires when the session is started
Session.Timeout = 1200 ' Setting to a very high number to ensure that whatever timeout value is set in IIS *should* stick
Session("VariableNames") = VariableValues ' ... multiple values here
End Sub
After exactly 2 minutes (120 seconds) from the last refresh, all the values retrieved using Session("") are blank. Here are a few screen caps to show the IIS settings.
Additionally because of this problem, I have created a generic dummy handle page called KeepSessionAlive.ashx and the following javascript is called using setInterval(KeepSessionAlive, 10000); (every 10 seconds) and I have confirmed that it is working, but the Session variables are still being dumped.
Code:
function KeepSessionAlive() {
//alert('testing');
$.post("KeepSessionAlive.ashx", null, function () {
$("#result").append("
Session is alive
");
});
}
Am I missing something? Why is it dropping my Session values?
View 2 Replies
Sep 10, 2010
One of my clients has requested the functionality of uploading documents by dragging and dropping them in the browser window. The website is being built with ASP.NET 3.5. I know of the 'dragdropupload' add-in for firefox, which allows dropping files on an upload control, but I also need it to work in Internet Explorer.
View 1 Replies
Mar 15, 2011
Does IIS allow a new version of dll to be dropped in an already running website? Does it say the DLL is being used? What will happen if we drop a new version of web.config? Is the outcome, a recycling of the application pool?
View 4 Replies
Jan 13, 2011
I have understood there is no way to keep leading zeros in a OleDbDataAdapter?
Im trying to read some data from a text file with:
MyCommand = New System.Data.OleDb.OleDbDataAdapter("SELECT F7, F5, F9, F1 FROM " & System.IO.Path.GetFileName(bonnerfil.PostedFile.FileName), MyConnection)
I have managed to keep leading zeros if I add a Schema.ini file into the directory with column set to Char.
But, when having a Shema.ini the select statement reads from start to end of the file. As you see in my select statement I prefer/must have the coulumn 7 first being read and so on. This do work and I will have get the result I want. But for now it´s either - get the order of columns correct or have leading zeros.
how can I either have a Schema.ini that reads the file in the order I want, or keep leading zeros and not have the order I want.
Code:
[Code]....
View 1 Replies
Sep 20, 2010
I have an ASP.NET application that relies on the Random class to generate a pseudo-random string. It uses the following code (this is part of a larger piece of sample code provided by Google for apps SSO):
public static class SamlUtility
{
private static Random random = new Random();
private static char[] charMapping = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p' };
public static string CreateId()
{
byte[] bytes = new byte[20]; // 160 bits
[Code]...
This normally works very well, but from time to time it starts generating a string of 'a'. From what I can tell from debugging, Random simply stops returning random numbers and instead fills bytes with the same value over and over. I've patched this by using a GUID instead, but I'm curious what happened in the original code. I'm assuming some form of entropy exhaustion, but I can't find any reference in the docs. Also, each time this has happened, performing iisreset restored the correct behavior.
View 1 Replies
Jan 13, 2011
I have a string coming from a stored procedure looks like '001234567'.
sqlCommand = new SqlCommand("csp_Bbp_OBN_GetBasePageList", BBConnection);
sqlCommand.CommandType = System.Data.CommandType.StoredProcedure;
sqlCommand.Connection.Open();
// Run the SQL statement, and then get the returned rows to the DataReader.
accReader = sqlCommand.ExecuteReader();............
In my case, from the stored procedure I am returning the varchar, after executing and reading it I am getting the value to basePage.GrouNum which is a string. So, I don't see where it is trimming the leading zeros.
Example: GroupNumber in the table is : "001234567"
BasePage.GroupNum after reading from DataReader : "1234567"
But, I do not want the leading zeros being trimmed.
View 3 Replies
Mar 17, 2011
I want to remove all the extra Zeros from a string.For example string is: '5.00560000' then I want to show it like '5.0056'I used Convert.double for this purpose, it is working ok but when the string is '0.0000500' then it is showing '5E-06' which is not ok.
View 3 Replies
Jan 13, 2011
How do you stop the auto suggest feature from dropping down suggestions while using jquery autocomplete. The auto suggest is dropping down over the autocomplete selections. Its terribly annoying. I've tried z-index. Nothing seems to stop it.
View 1 Replies
Jan 23, 2012
How do I do that with the code?
protected void btnExportExcel_Click(object sender, EventArgs e)
{
    Response.Clear();
    Response.Buffer = true;
   Â
    Response.AddHeader("content-disposition",
     "attachment;filename=GridViewExport.xls");
[CODE]...
View 1 Replies
Jul 7, 2010
I have a Gridview with some cells in numbers while in some cell they could be null without numbers. I need to modify it such that the numbers in the Gridview are in these formats:-
(a) If it is 12345.333 becomes 12,345
(b) If it is blank, I wish the cells to display 0
This is the code I am using to achieve (a), but when it comes to blank, it returns error (I believe my code below failed to provide blank cases but I dunno how. So what should be the code to do (b) above ?
For i As
Integer = 1
To N
e.Row.Cells(i).Text = String.Format("{0:#,##0}", Convert.ToDouble(e.Row.Cells(i).Text))Next
View 13 Replies
May 7, 2015
My datatable has 0123 when I export it becomes 123, Datatable can be numeric or alphanumeric, after searching I got this link [URL] ....
I didnt managed to use your code in DataTable.
My Code.
dtExport is my DataTable
DataGrid dGrid = new DataGrid();
dGrid.DataSource = dtExport;
dGrid.DataBind();
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
dGrid.RenderControl(hw);
[Code]....
View 1 Replies
Jan 6, 2011
I realized this has been asked multiple times before, but I still haven't been able to get it to work. I'm trying to export a Gridview to Excel without losing leading zeros. Here is my code. Add added the STYLE lines to try to fix the problem.
Dim attachment
As
String =
"attachment; filename=Awards.xls"
System.Web.HttpContext.Current.Response.ClearContent()
System.Web.HttpContext.Current.Response.AddHeader("content-disposition", attachment)
System.Web.HttpContext.Current.Response.ContentType = "application/ms-excel"
Dim sw
As
New StringWriter()
Dim htw
As
New HtmlTextWriter(sw)
gv.RenderControl(htw)
System.Web.HttpContext.Current.Response.Write(sw.ToString())
Dim STYLE
As
String =
"<style> .text { mso-number-format: ; } </style> "
System.Web.HttpContext.Current.Response.Write(STYLE)
System.Web.HttpContext.Current.Response.[End]()
View 4 Replies
Apr 19, 2010
I'm writing you because I can't display on Firefox the drag cursor for drag&dropping webparts. Is it possible to make this function available on Firefox?
View 1 Replies
Feb 11, 2010
I have a variable such as this string URL="http//:localhost, myhomepage";
how do I easily add the above into a hash table? With the url part being the key and the description being the value.
View 2 Replies
Mar 10, 2011
Is there a build in library in .NET that can compute secure one-way hash ? I mean a library that implements SHA-2 cryptographic hash function or something similar.
If is there is no SHA-2 implementation some weaker hash funcion would be sufficient. If there are more options I prefer the most secure one.
provide a use example e.g. provide the code that returns one-way hash for string mySampleString.
View 3 Replies