Security :: Compare The Hash Password

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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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")
Dim mycommand3 As New Data.SqlClient.SqlCommand("Update Register SET [Password] = @password WHERE [username] = '" & user.Text & "' AND [email] = '" & email.Text & "'", MyConnection3)
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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
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HttpContext.Current.User = New GenericPrincipal(fi, astrRoles)
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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;")
strSQL = "SELECT COUNT(*) FROM Register " _
& "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))
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; Initial Catalog=jrome2; User ID=jrome2; Password=Richard050283;")
strSQL = "SELECT COUNT(*) FROM Register " _
& "WHERE UserName='" & Replace(txtusername.Text, "'", "''") & "' " _
& "AND Password='" & Replace(txtpassword.Text, "'", "''") & "';"
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intUserCount = myCommand.ExecuteScalar()
If intUserCount > 0 Then
Return "client"
Return String.Empty
End If
End Function
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txtusername.Text = String.Empty
txtpassword.Text = String.Empty
End Sub

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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.

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Is this how hashed password stored in SQL Server should look like? This is function I use to hash password (I found it in some tutorial)

public string EncryptPassword(string password)
//we use codepage 1252 because that is what sql server uses
byte[] pwdBytes = Encoding.GetEncoding(1252).GetBytes(password);
byte[] hashBytes = System.Security.Cryptography.MD5.Create().ComputeHash(pwdBytes);
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EDIT: I tried to use sha-1 and now strings seem to look like as they are suppose to:

public string EncryptPassword(string password)
return FormsAuthentication.HashPasswordForStoringInConfigFile(password, "sha1");
// example output: 39A43BDB7827112409EFED3473F804E9E01DB4A8

Result from the image above looks like broken string, but this sha-1 looks normal....

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I'm using the code below to authenticate a user in Active Directory, but the password is sending in clear text. How can I hash my password and then send it to Active Directory?

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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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I use this code to use in login

FormsAuthentication.HashPasswordForStoringInConfigFile(txtPassword.Text, "SHA1")

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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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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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I using change password control, how can i change the password without enter the current password?

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I had been trying to solve this but there is a hidden key i wish someone point me to.

I had a simple membership database with users in first the Membership Provider configured for clear password to retrieve the original password .

Now a new requirement say that the password must be hashed and reset .

I configure the Membership password to hash , and Implemented the Reset Password Module.

My problem is as follow.

If the user is new registered user with the new configuration the password and the security answer is hashed.

also when I go and reset the password it continue to be hashed.

Now I thought that with new configuration if any previous user with clear text configuration , If he use the password Reset module , because my configuration now is hashed , I expected that the new password and security answer will be hashed . what happen is old user continue in clear text even if the configuration is hashed. so If I had new users everything is fine.

old users Membership Provider somehow know they had been stored in clear text and it keep change password and security answer in clear text . If I delete this user and create it , Membership Provider understand that everything will be hashed. I need to know how it know this , I need to migrate users not to delete and recreate users .

Also if there are no solution for that , I wish Microsoft Consider it in future cause it is a real user scenario, that can happen imagine a business system that related to membership user Id , deleting users and recreate them is not a solution .

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Every time I change my password , password change shows that I was successfull but after clicking on the continiue button password change component comes back. I went to properties of password change component and entered the main default page as destination but it is not helping.

I close the IE clear the cache , even restart the machine. When I login always taking me to the password change page.

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Here is my code.

Reference URL:
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