Creating shared folders and specifying share permissions-VBForums
Results 1 to 12 of 12

Thread: Creating shared folders and specifying share permissions

  1. #1

    Thread Starter
    Pro Grammar chris128's Avatar
    Join Date
    Jun 2007
    Location
    England
    Posts
    7,595

    Creating shared folders and specifying share permissions

    OK so I could not find a single example anywhere on the web for setting Share permissions (not NTFS permissions) from .NET code so I decided to post my own code here now that I have got it all working. There are plenty of examples for just creating shares and not specifying any permissions, and examples of how to set the permissions in C++ but not any working implementations of the relevant APIs in .NET (not that I could find anyway). Yes you can do it via WMI but personally I avoid using WMI whenever there is an alternative method so I've spent the last 2 days trying to get the various Windows APIs required to do this working from a VB.NET program... and I've finally finished it

    Rather than just post the API definitions and leave it for you to figure out exactly how to use them to get the desired effect (ie to add multiple permissions, or deny permissions etc), I've created a method that you can call which will do all of the API work for you, so you can simply call this method and pass in the share name, comment, local path to the folder that is to be shared, and a list of users with the share permissions you want each of them to have

    I will post the definitions in the next post but here is an example of how you can use it once you have got them:

    vb Code:
    1. 'Create a list that will hold our permissions
    2.         Dim PermissionsList As New List(Of SharePermissionEntry)
    3.  
    4.         'Create a new permission entry for the Everyone group and specify that we want to allow them Read access
    5.         Dim PermEveryone As New SharePermissionEntry(String.Empty, "Everyone", SharedFolder.SharePermissions.Read, True)
    6.         'Create a new permission entry for the currently logged on user and specify that we want to allow them Full Control
    7.         Dim PermUser As New SharePermissionEntry(Environment.UserDomainName, Environment.UserName, SharedFolder.SharePermissions.FullControl, True)
    8.  
    9.         'Add the two entries declared above to our list
    10.         PermissionsList.Add(PermUser)
    11.         PermissionsList.Add(PermEveryone)
    12.  
    13.         'Share the folder as "Test Share" and pass in the desired permissions list
    14.         Dim Result As SharedFolder.NET_API_STATUS = _
    15.         SharedFolder.ShareExistingFolder("Test Share", "This is a test share", "C:\SomeFolder", PermissionsList)
    16.  
    17.         'Show the result
    18.         If Result = SharedFolder.NET_API_STATUS.NERR_Success Then
    19.             MessageBox.Show("Share created successfully!")
    20.         Else
    21.             MessageBox.Show("Share was not created as the following error was returned: " & Result.ToString)
    22.         End If

    So this example shares the folder C:\SomeFolder as "Test Share" and grants the Everyone group Read access and the currently logged on user Full Control.
    Note that this does not set NTFS permissions - just Share permissions. If you want to set the NTFS permissions as well then look here: http://www.vbforums.com/showthread.php?p=3808272

    Also note that these APIs do not seem to work on a 64 bit OS if your program is set to target 64 bit CPU - if you set your project to target x86 then it works fine on 64 bit and 32 bit OS but if you set to AnyCPU then it will only work correctly on a 32 bit OS.
    Last edited by chris128; May 27th, 2010 at 07:11 AM.
    My free .NET Windows API library (Version 2.2 Released 12/06/2011)

    Blog: cjwdev.wordpress.com
    Web: www.cjwdev.co.uk


  2. #2

    Thread Starter
    Pro Grammar chris128's Avatar
    Join Date
    Jun 2007
    Location
    England
    Posts
    7,595

    Re: Creating shared folders and specifying share permissions

    Could not post the contents here as it is too long for the post size limit, so I've attached the 2 vb files to this post.

    See "Attached Files" section at the bottom of this post for my classes that make use of the NetShareAdd Windows API (and a couple of others) - just add them both to your project and then you can use my simple .NET wrapper as shown in the previous post Of course you can also just use them to see how the APIs are defined and used etc and make your own .NET versions.

    EDIT: New version of SharedFolder class uploaded that now allows you to create a share on a remote machine. There is now an optional argument for the SharedFolder.ShareExistingFolder method where you can specify the remote machine name - do not use "\\ServerName", just "ServerName" will do it.
    If you want to create the share locally then just either miss this argument off or specify Nothing for it.

    Here is an example of sharing the folder D:\Shared as "Shared Folder" on a remote server called TestServer:
    vb Code:
    1. SharedFolder.ShareExistingFolder("Shared Folder", "This is an example comment", "D:\Shared", PermissionsList, "TestServer")

    Note that I have included this functionality (along with a load of other Windows API based functions) in my Windows API library, which you can download for free here: http://cjwdev.wordpress.com/2010/07/...pack-released/
    Attached Files Attached Files
    Last edited by chris128; Jul 13th, 2010 at 05:24 PM.
    My free .NET Windows API library (Version 2.2 Released 12/06/2011)

    Blog: cjwdev.wordpress.com
    Web: www.cjwdev.co.uk


  3. #3
    Junior Member Dawg's Avatar
    Join Date
    Nov 2009
    Location
    Portland Or, USA
    Posts
    26

    Re: Creating shared folders and specifying share permissions

    It looks like the permission list is passed in when the folder is shared...

    Any way to view/modify permissions to an existing share on a remote server?

    I have about 300 users I need to add to 6 different folders. I cant do it to an upper level folder as sibling folders need different permissions, I can't create a group on the domain, I can't use "Everyone" - in fact that's what needs to be removed, and obviously I don't want to add them manually.

    Thoughts?

  4. #4

    Thread Starter
    Pro Grammar chris128's Avatar
    Join Date
    Jun 2007
    Location
    England
    Posts
    7,595

    Re: Creating shared folders and specifying share permissions

    I don't think you are talking about share permissions, it sounds like you mean NTFS permissions. Share permissions only get set on the root of the share not sub folders within the share, i.e "\\server\share" not "\\server\share\subfolder". If you want to work with NTFS permissions then see this thread: http://www.vbforums.com/showthread.php?p=3808272
    My free .NET Windows API library (Version 2.2 Released 12/06/2011)

    Blog: cjwdev.wordpress.com
    Web: www.cjwdev.co.uk


  5. #5
    Junior Member Dawg's Avatar
    Join Date
    Nov 2009
    Location
    Portland Or, USA
    Posts
    26

    Re: Creating shared folders and specifying share permissions

    You are correct (and that application looks so much easier). Thanks.

  6. #6
    Fanatic Member
    Join Date
    Apr 2006
    Posts
    746

    Re: Creating shared folders and specifying share permissions

    Hi,

    I think I was the original "inspiration" for this lovely piece of code as I was trying to figure out how to do it myself

    Anyway, I've finally had time to go back to the application I was creating that needed this code and I've hit a snag.

    It works brilliantly if the permissions you are trying to set are for a pre-existing user. However, my application creates a user in AD, creates the folders and then tries to share them and set the permissions. Fairly often, this fails because AD replication hasn't taken place yet and I get the error thrown by this bit of code

    Code:
          If SetEntriesResult = ERROR_NONE_MAPPED Then
                    Throw New ApplicationException("The account " & FullAccountName & " could not be mapped to a security identifier (SID). " & _
                                                   "Check that the account name is correct and that the domain where the account is held is contactable. The share has not been created")
                ElseIf SetEntriesResult <> 0 Then
                    Throw New ApplicationException("The account " & FullAccountName & " could not be added to the ACL as the follow error was encountered: " & SetEntriesResult & ". The share has not been created")
                End If
    Is there anyway of using the user's SID instead of the domain\username? This would mean you don't have to wait for replication
    ManagePC - the all-in-one PC management and inventory tool

  7. #7
    Fanatic Member
    Join Date
    Apr 2006
    Posts
    746

    Re: Creating shared folders and specifying share permissions

    ManagePC - the all-in-one PC management and inventory tool

  8. #8

    Thread Starter
    Pro Grammar chris128's Avatar
    Join Date
    Jun 2007
    Location
    England
    Posts
    7,595

    Re: Creating shared folders and specifying share permissions

    Quote Originally Posted by Ginolard View Post
    Yeah, that uses WMI, and I hate WMI due to its performance and reliability issues so I always choose to use Windows APIs instead if possible
    My free .NET Windows API library (Version 2.2 Released 12/06/2011)

    Blog: cjwdev.wordpress.com
    Web: www.cjwdev.co.uk


  9. #9

    Thread Starter
    Pro Grammar chris128's Avatar
    Join Date
    Jun 2007
    Location
    England
    Posts
    7,595

    Re: Creating shared folders and specifying share permissions

    Quote Originally Posted by Ginolard View Post
    Hi,

    I think I was the original "inspiration" for this lovely piece of code as I was trying to figure out how to do it myself

    Anyway, I've finally had time to go back to the application I was creating that needed this code and I've hit a snag.

    It works brilliantly if the permissions you are trying to set are for a pre-existing user. However, my application creates a user in AD, creates the folders and then tries to share them and set the permissions. Fairly often, this fails because AD replication hasn't taken place yet and I get the error thrown by this bit of code

    Code:
          If SetEntriesResult = ERROR_NONE_MAPPED Then
                    Throw New ApplicationException("The account " & FullAccountName & " could not be mapped to a security identifier (SID). " & _
                                                   "Check that the account name is correct and that the domain where the account is held is contactable. The share has not been created")
                ElseIf SetEntriesResult <> 0 Then
                    Throw New ApplicationException("The account " & FullAccountName & " could not be added to the ACL as the follow error was encountered: " & SetEntriesResult & ". The share has not been created")
                End If
    Is there anyway of using the user's SID instead of the domain\username? This would mean you don't have to wait for replication
    I know this doesn't answer the question (I don't know the answer to that off the top of my head) but I'm assuming from your description that you are creating and sharing the user's home drive? If that's the case, generally people just set the share permissions to Everyone - Full Control and then use the NTFS permissions to actually restrict access.
    My free .NET Windows API library (Version 2.2 Released 12/06/2011)

    Blog: cjwdev.wordpress.com
    Web: www.cjwdev.co.uk


  10. #10
    Fanatic Member
    Join Date
    Apr 2006
    Posts
    746

    Re: Creating shared folders and specifying share permissions

    Ah...well, I may have to use that WMI version because it's designed to use SIDs and not domain accounts.
    ManagePC - the all-in-one PC management and inventory tool

  11. #11

    Thread Starter
    Pro Grammar chris128's Avatar
    Join Date
    Jun 2007
    Location
    England
    Posts
    7,595

    Re: Creating shared folders and specifying share permissions

    Well the WMI stuff only calls the Windows APIs anyway... so its definitely possible using the Windows APIs directly. Also that example you posted doesn't only use the SID, it looks like it requires the user's username and the SID.
    EDIT: In fact it actually says at the bottom of the article:
    With Windows Vista, you do not need to supply Sid. You can supply just the domain name and the user name, it will work. Using Server 2003, and most likely XP, you have to supply all three, user name, domain, and Sid.
    So in fact it is the opposite of what you want - with that example you always need the username.

    Anyway, I just took a very quick look at the source code for my Windows API library that contains a function similar to the one I posted here and it looks pretty easy to change it to use a SID (though I haven't tested it).

    Here's where the TRUSTEE structure is created:
    vb Code:
    1. 'Create a TRUSTEE structure and populate it with the user account details
    2.             Dim Account As New ApiDefinitions.TRUSTEE
    3.             With Account
    4.                 .MultipleTrusteeOperation = ApiDefinitions.MULTIPLE_TRUSTEE_OPERATION.NO_MULTIPLE_TRUSTEE
    5.                 .pMultipleTrustee = 0
    6.                 .TrusteeForm = ApiDefinitions.TRUSTEE_FORM.TRUSTEE_IS_NAME
    7.                 .ptstrName = FullAccountName
    8.                 .TrusteeType = ApiDefinitions.TRUSTEE_TYPE.TRUSTEE_IS_UNKNOWN
    9.             End With
    I imagine you could just change it to this:
    vb Code:
    1. 'Create a TRUSTEE structure and populate it with the user account details
    2.             Dim Account As New ApiDefinitions.TRUSTEE
    3.             With Account
    4.                 .MultipleTrusteeOperation = ApiDefinitions.MULTIPLE_TRUSTEE_OPERATION.NO_MULTIPLE_TRUSTEE
    5.                 .pMultipleTrustee = 0
    6.                 .TrusteeForm = ApiDefinitions.TRUSTEE_FORM.TRUSTEE_IS_SID
    7.                 .ptstrName = FullAccountName
    8.                 .TrusteeType = ApiDefinitions.TRUSTEE_TYPE.TRUSTEE_IS_UNKNOWN
    9.             End With

    and then you just need to set the ptstrName property to the SID instead of the account name as I'm doing in the example above
    Last edited by chris128; Aug 25th, 2011 at 12:18 PM.
    My free .NET Windows API library (Version 2.2 Released 12/06/2011)

    Blog: cjwdev.wordpress.com
    Web: www.cjwdev.co.uk


  12. #12
    New Member
    Join Date
    Nov 2012
    Posts
    1

    Re: Creating shared folders and specifying share permissions

    Hi
    I've used this project to the desired folder on the network and could share it. But I want to access the folder after It was created, I change the permissions (edit or delete the permission) How can I access the permission of that folder elsewhere in the program or change the permission of other users to that folder?
    Many thanks to your replies

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  



Featured


Click Here to Expand Forum to Full Width

Survey posted by VBForums.