Security :: How To Authenticate User With Password
Dec 14, 2010
I´m building a home page where logged in users shall buy products. To be able to get to the buy page the user already has to be logged in. But when he shall execute the buy he has to reenter his password again to check the user a second time. How do I check if his entered password matches his user password? I´m using the ASP Membership library and I have passwordFormat="Hashed".
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Feb 4, 2010
I just begin creating a website for an organization. First page to be displayed in the login page. I dont have any knowledge in ASP.NET Security. On Login page, i want to display UserName field as disabled with the useralias of the user who currently logged into Windows. Password user has to provide and it should be that user's windows password.
How do i validate that password that user has entered is his windows password?
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Mar 7, 2010
I am creating a website for reset the password in one of the application from the back end.
I have created a webpage with only one button called "RESET".
If user click the button, it should check the user have already access the application from the "USER" table. If no access, the message appears "You do not have an access."
If yes, next step whether the user have authenticate. If yes update the encrypted password from new table called "UMRESET" to the application table "USER" password.
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Mar 10, 2010
I am having a issue with my form authenticating the form. I checks to see if there is a password but does not authenticate. Here is my code.
[Code]....
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Jan 29, 2011
I am trying to implement a small site which requires users to login using Forms based authentication. I have followed the tutorials found on various sites on the net and in particular the one at [URL]
This enabled me to get a sample environment in place but it seems as though I am having a problem authenticating a user for which I know the username and password are correct.
I have a ASP.Net 3.5 site with my login.aspx form in a folder named login, my default.aspx in the root of the site and my protected content in a folder called main.
I am authenticating against a SQL Server Express database, so I have ran the aspnet_regsql.exe command to populate my database.
I have added the following authentication/authorization lines to my web.config
<authentication mode="Forms">
<forms loginUrl="~/login/Default.aspx"
protection="All"
timeout="30"
name="AppNameCookie"
path="/FormsAuth"
[code]...
I believe that my connection string and my database are ok because if i use the ASP.NET Configuration from within Visual Studio I can create and manage my users and I can also see them in the tables in the SQL Server. Also if I do enter any incorect credentials in my login page the page tells me that the password is incorrect.
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Mar 10, 2010
I got a username and password field which made by myself and a User database which is all manually made
So now I wish to know how to authenticate user using the username and password data enter by the user and match with the database data to verify user is a member and login?
For what i know, the code should be something like this
SELECT UserName, Password FROM dbo.User WHERE UserName - @UserName
@UserName = ?
How do i assign the value from my username text field to @UserName?
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Mar 26, 2010
How do I use the FormsAuthentication.Authenticate(Username,Password) method to match against the generated Database?..since as far as I have read, it matches the values against the Web.config.
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Jul 5, 2010
The below code and the config works fine, but force to enter user name/password case sensitively, i want to make it non case sensitive.
Code:
protected void LoginButton_Click(object sender, EventArgs e)
{
try
{
string uid = UserText.Text.Trim();
string pwd= PwdText.Text.Trim();
if (string.IsNullOrEmpty(uid) ||
string.IsNullOrEmpty(pwd)).....
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Mar 12, 2010
I Need to Authenticate a User by using FormsAuthentication.SetAuthCookie and Check User is Authenticated in Another page Load How to Do this anyone?
Login Page
if (txtuname.Text == "mike")
{
FormsAuthentication.SetAuthCookie("mike", true);
Response.Redirect(FormsAuthentication.DefaultUrl);
}
Welcome Page
PageLoad()
{
}
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Apr 8, 2010
i want to interlink between 2 applications of mine.. suppose a user has logged in one of my application and me store his username and password in cookies...nd nw i want to use those values in the cookies to log-in in other website without entering the username and password again for the other website. i mean to i want to skip the login page of other website.
protected void btnclick_Click(object sender, EventArgs e)
{
HttpCookie username = new HttpCookie("UserName", "a");
HttpCookie password = new HttpCookie("Password", "a");
Response.Cookies.Add(username);
Response.Cookies.Add(password);
Response.Cookies["UserName"].Expires = DateTime.Now.AddHours(1);
Response.Cookies["Password"].Expires = DateTime.Now.AddHours(1);
}
this is the code for storing values in cookie on click of a button. nw in 2nd application on page load i am using this code.
HttpCookie userName = Request.Cookies.Get("UserName");
HttpCookie password = Request.Cookies.Get("Password");
if (userName != null && password != null)
{
if (Membership.ValidateUser(userName.Value, password.Value))
{
FormsAuthentication.RedirectFromLoginPage(userName.Value, false);
}
}
here m able to get the username nd password but don't how to validate that username and password so that i can skip the login page of this application..m not sure about the code in BOLD above if its rite or worng.. and for Login i am using ASP login Control
in both applications.
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Mar 25, 2010
how to authenticate a user using the central authentication service?
I created a login page to enter the user name etc. I have the server for the authentication.
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Aug 13, 2010
how can add another dropdown inside the login control and authenticate the user on the basis of user name,password,and location.
is there any other way?
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Feb 25, 2010
Im creating an application where the user table is stored outside the database, therefore i wont need to use the built-in asp.net user tables. However i would still like to use all the features the asp.net membership security provides i.e. restrict users from certain pages using the web.config
I would like to authenticate the user manually and set roles to that user temporarily only for that session. Is this possible?
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Aug 12, 2010
I have a custom membership user class and custom MembershipProvider working against database. Due to security reasons the user passwords are stored in the database as hashed values. So my procedure
public override bool ValidateUser(string username, string password) is
{
//select hashed password from db
return (EncodePassword(password) == dbpassword)
}
[code]....
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Dec 10, 2010
I'm using the ChangePassword method of membership provider to change the password and one of the requirement before calling the changepassword is to retrieve the current password. But I'm getting error:padding is invalid and cannot be removedbelow is my web.config:
< system.web> < machineKey validationKey="4FD671E39167DFB91A918018007D095E50B7D2971B01AEDE26A7233FD9CC4A470F80689997EC2C7BB515F9D82C8B4D1F3A8495193630B11E8401C96BD0A5A133" decryptionKey="ED1555E75C7B91738172E0086456C70B9CAA4C44214FC2B1907123993EA4FA53" validation="SHA1"
decryption="AES"/>....< /system.web>
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Nov 14, 2010
I have an ASP.Net 4.0 application that is using Forms Authentication and ActiveDirectoryMembershipProvider. It authenticates against Active Directory running on Windows Server 2008 R2.I use ChangePassword control for changing passwords.When the user changes the password he can log on for some time with the old password. My client feels this is a security problem with the application. Is there any way to make sure the old password does not work after the user changes it?Also, if I do iisreset on the web server, the old password stops working. The password must be cached somewhere in the web app.
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Feb 7, 2011
I have built a login form that does not use the asp.net 'login' control.
in my code behind i have this:
[Code]....
but this does not seem to maintain my user loged in... as soon as the user navigates to the next page he is loged out again...
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Mar 14, 2011
I can recover my password but when I try to change my password to something a bit easier to remember it gives me:
Password incorrect or New Password invalid. New Password length minimum: 7. Non-alphanumeric characters required: 1.
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Feb 22, 2010
I am a newbie and using Visual Web Developer 2008 Express Edition developing a website with some SQL database and a membership folder.
The membership folder security was set via Website/ASP.NET Configuration and with Permission Deny for Anonymous users, and a user id and password was created.
However when running the website and login with the created userid and password, it failed to log in with error message "Your login attempt was not successful. Please try again." I suspect that the system could not find the ASPNETDB.MDF even though it is in the App_Data folder.
I have separately developed another website with Membership and User Login by following the example in ASP.NET Walkthrough in Learn Web Devbelopment, and it works ok.
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Mar 15, 2010
Is there a way to reset a user's password while logged in as an administrator? I just had to delete a user and re-create him in order to achieve the same affect of resetting his password, so I'm wondering if there is a better way to reset a password.
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Jul 28, 2010
i have implemented asp. net membership authentication and one of my users has forgotten his password.
The passwords are hashed and when i try retrieveing his password i get the error that password retrieval is not available for hashed passwords.
Should i reset the password?
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Jun 22, 2010
I am working on membership concepts in asp.net. Now i want to reset new password and getpassword for specific user.
this is my web.config code:
<add name="MySqlMembershipProvider" connectionStringName="SQL2005DB380ConnectionString" applicationName="MyAppName" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" passwordFormat="Encrypted" enablePasswordReset="true" minRequiredNonalphanumericCharacters="1"
passwordAttemptWindow="10" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
How can I get old password and reset new password.
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Mar 18, 2010
I've created a login page but when I try to sign in with user name and password, it will not execute.I've gone over the process numerous times and have deleted the user (me) and re-created the user (me).Does anyone have any clues as to what I might be over-looking.
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Mar 8, 2010
I have login control on my asp vb project i want when i press button
fill user name and password in login control
with some thing i have in code and then call submit button in control
all that using button1 control i dont want use login control to insert
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Dec 10, 2010
Does anyone know how I can authenticate users based on their Email Address and Password as oppose to Domain, Username and then Password?
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