I am in the process of developing a vb.net app
I need to create a remote desktop in VB.net and without entering username and password each time.
Ex: when pressing a button called "A", it should open a remote desktop connection directly without requiring the username and pass of this A.
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I am developing a Windows Forms VB Project that will allow users to connect to a remote SQL Server database to enter and edit data. During development I have been using the integrated connection string to connect to the SQL Server instance.
At this time, I need to add a login box that would modify the connection string and adjust their data access accordingly. I have the form set up to get the username and password and confirm their login credentials against the Server, but I am having problems modifying the global connection string for my project. I am using Visual Studio 1017. I would appreciate any assistance or suggestions.
Thanks!
I need to connect to SQL Server using a Windows Authentication user by specifying username and password in the connection string.
Somehow I need to make a connection like this to work:
driver=com.microsoft.sqlserver.jdbc.SQLServerDriver
url=jdbc:sqlserver://192.168.48.61\\sqlexpress2008r2;
databaseName=MyTestDatabase;integratedSecurity=true;
username=mydomain\eric;password=mypwd
Since the requirement seems odd I try to exlpain my scenario:
in my application the users are mapped to SQL Server users (either using sql authentication or windows authentication)
there is a Windows client to access the database from inside the LAN
i am writing a web application (Tomcat8 servlet) to access the database from internet: in this case i want the user to type domain\username and password in the login screen to log him in
The reason why i do this is because I need to test if the supplied domain\username and password are valid. After this check is done i will connect to the db with the sa user but assign to the logged in user the proper privileges (depending on he username).
Because of an architectural constraint I should test this by trying to conncet to the database using JDBC, so the idea is:
create the connection string for a windows authentication user
try to connect
if connection is esatabilished i assume user and password are correct.
So i need to create a JDBC connection string in which i use integrated security and i explictly define a username (DOMAIN\USER) and password. I did not find any example on how to perform this.
driver=com.microsoft.sqlserver.jdbc.SQLServerDriver
url=jdbc:sqlserver://192.168.48.61\sqlexpress2008r2;
databaseName=MyTestDatabase;integratedSecurity=true;
username=mydomain\eric;password=mypwd
This will NEVER work.
So if there is a user abc\user1 in windows whom you want to allow
access to the database, then create a SQL Server login with exactly
same user name and password.
This will never work too.
You just cannot create SQL Server login (opposed to Windows login in this context) with "\", it will be recognized as Windows login and you'll get an error about invalid characters.
Trusted connection or Integrated security means that it's not a server that authenticates you, but it's Windows that does it.
So in no way can you pass Windows name and a password: your account should be verified by Windows and SQL Server will only trust these credentials.
To express myself better i start by example.
In my client server application there is a users table.
Each user is mapped to a sql server user.
The database is full of tables, anyway each user can query just 1 table.
The table contains the following information:
the version of the database (so the client app can check whether the database version matches with the client version)
the db admin login name (tipically "sa")
the db admin password (this is encrypted with custom algorithm for security - please note i install a dedicated Sql Server Instance for my applciation)
I make sure each user can query just a table by executing for each user:
GRANT SELECT ON ConnectionTable TO LoginName
So the full flow is:
1) the user inserts username/password
2) the client application retrieves all the info from ConnectionTable
3) the client applicaion decrytpts the sa password
4) the client application logs in as sa so all tables are visible and editable
Now this is what i have (legacy) and I cannot change it.
Somehow this "custom login trick" has been done to avoid to write somewhere on the client the sa password, many client server software i know in fact all use sa to connect and user/password are just two fields of a simple USERS table, but the real connection string is somehow (with a certain degree of security) saved on a file in each client; in my case the "connection string" is stored in the database so as a user logs in to the database (even if with a user that has a restricted access) he gets all he needs to succesfully login.
Since i install Sql Server in mixed mode i support also Windows AUthentication.
So at login the user has a switch to choose between SQl Server and Windows Authentication, as it happens when connecting to SS Management Studio.
What i am trying to achieve now is to login as another user.
I would like that the user checks "Windows Authentication" but he/she can still type the username and the password.
My application is written in Delphi using the SDAC components. As far as i understand SDAC does not allow to perform what i need to do, but i could change only the login part using anothe DAC (Firedac for example). My goal is to login as another windows user.
The final goal is to query ConnectionTable so that i can retrieve the encrypted sa password and login.
So my question is:
is it possible (in Delphi Seattle VCL Application) to login to a Sql Server database by setting a windos user different than the current logged in user?
UPDATE:
To better explain my need i describe the real scenario that generates my requirement.
I created a web applciation (using VCL for the web) that uses the same authentication method as my client server application does.
Imagine my user is MyDomain\MyUser, when I am in LAN i will use Windows authentication to login, but when I login let's say from my Android Phone I would like to login as MyDomain\MyUser by providing password. This is the case, in fact i do not need to impersonate other users, i just want to login with my user when i am not logged in on a Windows pc in a LAN.
So somohow at the login screen of my application i would like to choose Auth: Win/SQL and in case Win is chosen, i would like to pass the actual username and password to login.
I hope this clarifies more the scenario.
Moreover i also host my application in the cloud and in this case all users are WIndows authentication users of a domain that i created for administratrive purposes, and each user needs to provide username and password to login.
My request comes from the fact that I always supposd that Winows Authentication = LDAP and therefore in LDAP it is possible to specify user and password, while in sql server it looks somehow user is pre-defined (and = to the logged in user) in case of Windows authentication.
My Powershell script uses Connection Strings to connect to the sql server instance and with executeReader gets the data.
Now to connect using current windows authentications of the system user,
$conn.ConnectionString = "Server=$SrvName; Integrated Security=true;"
But In case I want to use alternate windows authentication credentials and note the I do not want to use SQL Server Authentication but windows authentication with alternate credentials and not the current credentials i.e
This uses SQL Server Authentication, right?
$conn.ConnectionString = "Server=$SrvName; UserName=User1; Password=pwd;"
I don't want it.
I want a ConnectionString with Username, password input but uses Windows Authentication with those given inputs.
From the Powershell icon or shortcut hold the shift button while you right click. This will open up a menu with the option to run the application as a different windows user. Note, this does not work from the start menu only from a shortcut on the taskbar or other folder or from the .exe itself.
We are using a Windows Server 2012 box to host a QlikView server. Users access a QlikView portal via their web browser, and never need to login to the actual windows box, however they are authenticated by their windows username and password.
I have created random passwords for every user but I would like to allow users to change these without needing to login to the actual box remote. Is this possible?
Thanks