Security :: Generate Hash For Fixed Length?

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.

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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.





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VS 2005 Fixed Length Of Variables

Apr 4, 2011

I am doing an output to a text file using



The file get's created and records are written. Now, the problem is that this needs to be a fixed length text file. I am reading data retrieved from a stored procedure and looping through a data table to populate the text file like:



For Each Row In myDataTable.Rows
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get a fixed length regardless what is filled from my data table?

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Crystal Reports :: How To Set Fixed Length Of Detail Section

Apr 3, 2010

Actually i am creating 1 sofware in which i need to print bill. On that bill my page header (company's name) is constant & on Report footer (companys rule & some more data) is also constant. & my Detail section is varying. On bill if data is short, my footer goes upside.

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I need to fixed my footer section so that position of footer section will be maintained.

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Feb 4, 2010

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Feb 17, 2011

I'm attempting to create a pure t-sql representation of the default SHA-1 password hashing in the ASP.Net Membership system. Ideally, what I would get would be this:

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cbehrens 34098kw4D+FKJ== 34098kw4D+FKJ==

Note: that's bogus base-64 text there. I've got base64_encode and decode functions that round-trip correctly. Here's my attempt, which doesn't work: SELECT UserName, Password, dbo.base64_encode(HASHBYTES('SHA1', dbo.base64_decode(PasswordSalt) + 'test')) As TestPassword FROM aspnet_Users U JOIN aspnet_membership M ON U.UserID = M.UserID

I've tried a number of variations on the theme, to no avail. I need to do this in pure T-Sql; involving a console app or something like that will double the work. So if anyone can supply what precisely the syntax should be to duplicate that password from the ASP.Net membership stuff

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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 :


They keep rejecting my checksum. When I have tested for the following value passed in preConvert - 300265215063.79 I get :

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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.

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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.....


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Apr 22, 2010

Is there a in built function in ASP.NET to hash passwords??

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Security :: Changing The Hash Algorithm Used For CreateUserWizard?

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.

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Security :: Insert Hash Password Into Sql Server 05 And Logging In Against It

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"))
Dim MyConnection3 As New Data.SqlClient.SqlConnection("Data Source=xxx")
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Dim pass As String
Dim rnd As Integer, randomNum As New Random
rnd = randomNum.Next(1000, 10000)
pass = "Pass" & rnd
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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)
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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; Initial Catalog=jrome2; User ID=jrome2; Password=Richard050283;")
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& "WHERE UserName='" & Replace(txtusername.Text, "'", "''") & "' " _
& "AND Password='" & Replace(txtpassword.Text, "'", "''") & "';"
myCommand = New SqlClient.SqlCommand(strSQL, myConnection)
intUserCount = myCommand.ExecuteScalar()
If intUserCount > 0 Then
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, _
Response.Cookies.Add(New HttpCookie(FormsAuthentication.FormsCookieName, _
Response.Redirect(FormsAuthentication.GetRedirectUrl(txtusername.Text, False))
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End Sub
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As Boolean
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End Function
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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; Initial Catalog=jrome2; User ID=jrome2; Password=Richard050283;")
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& "WHERE UserName='" & Replace(txtusername.Text, "'", "''") & "' " _
& "AND Password='" & Replace(txtpassword.Text, "'", "''") & "';"
myCommand = New SqlClient.SqlCommand(strSQL, myConnection)
intUserCount = myCommand.ExecuteScalar()
If intUserCount > 0 Then
Return "client"
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

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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

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10232323 -> training

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Oct 24, 2010

Anyone know why the minimum password length is 6 chars?

I can't find any reference to this anywhere.

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Oct 6, 2010

When i try to encrypt it goes fine.. but when i right after try to decrypt it i get an:"Length of the data to decrypt is invalid" error... the error occours when i try to run the code FlushFinalBlock();here is my code:


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I have a datagrid and I set up the paging based on how many rows there are like this

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Security :: Why Password Length Minimum: 7. Non-alphanumeric Characters Required: 1 - NOT PASSWORD RELATED

Feb 24, 2011

I am using Forms Authentication in a new ASP.NET 3.5 Application.I have created the Tables in my database and run the Web Site Administration Too.When I try to create a user I get a password error no matter what I throw at it and I am becoming sure of that this is a symptom of an a setup error and not a password problem.One of the things that I notice is that my aspnet_Applications is empty and I am not sure what is supposed to fill it.I have tried to delete all the aspnet tables and done the procedure again but with the same result.

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Jun 14, 2010

I am using encryption/decryption logic from the following link: [URL] Code from this page is working but at times, its throwing an error while decyption as 'Length of the data to decrypt is invalid'. I have a very limited knowledge on this topic so I am no able to troubleshoot it further

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Since I'm new to coding and I'm trying to understand why here is a little more detail on the question.If you have a text box and you are limiting the input to say 2 charactrs do you really need to validate the input further? What I have is a text box that has a max length of 2. Is there a security reason to add a validator to the textbox. I should add this is in

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Is it possible to call a membership provider to generate a username and password automatically?

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i want to generate ID Card Image with first name and last name and ID number with barcode after the customer finish registration

and send it to him/her email

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Add String Into A Hash Table?

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I have a variable such as this string URL="http//:localhost, myhomepage";

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