How can I replicate New-SmbGlobalMapping in C# code? - powershell

Question

I am writing a service which controls docker containers. I want to have the mounted volume as an Azure share, and thus need to use the SMB Global Mapping. If I use the usual WNetAddConnection2A then I can mount the share just fine in my code, but the containers cannot see it as it is not "global". I can't find source for the PowerShell New-SmbGlobalMapping command (is there a way to see it?) and I can't find a suitable API to call. I hope someone knows the magic incantation I can put in my .NET code.

Answer 1

I can't find source for the PowerShell New-SmbGlobalMapping command
(is there a way to see it?) and I can't find a suitable API to call. I
hope someone knows the magic incantation I can put in my .NET code.
PowerShell uses WMI
In your case, it calls
Create method of the MSFT_SmbMapping class (MSFT_SmbGlobalMapping exactly)
You can use WMI Code Creator to generate/test C# code
EDIT : Test with PowerShell.Create
Test as Admin ("requireAdministrator" in manifest) on Windows 10
Test code (C#, VS 2015) =>
// PowerShell calls CredUIPromptForCredentialsW to display the User/Password dialog (you can call it with P/Invoke if needed)
string sUser = "user#provider.com";
string sPassword = "myPassword";
System.Net.NetworkCredential networkCredential = new System.Net.NetworkCredential(sUser, sPassword, null);
System.Security.SecureString securePassword = new System.Security.SecureString();
foreach (var c in networkCredential.Password)
securePassword.AppendChar(c);
// Add reference to :
// C:\Program Files (x86)\Reference Assemblies\Microsoft\WindowsPowerShell\3.0\System.Management.Automation.dll
// Add :
// using System.Management.Automation;
PSCredential psCredential = new PSCredential(networkCredential.UserName, securePassword);
// Error handling must be improved : if I pass an invalid syntax for "RemotePath" or not launched as Admin,
// nothing happens (no error, no result) (on Windows 10)
string sLocalPath = "Q:";
string sRemotePath = "\\\\DESKTOP-EOPIFM5\\Windows 7";
using (var ps = PowerShell.Create())
{
ps.AddCommand("New-SmbGlobalMapping");
ps.AddParameter("LocalPath", sLocalPath);
ps.AddParameter("RemotePath", sRemotePath);
ps.AddParameter("Credential", psCredential);
//ps.AddParameter("RequireIntegrity", false);
//ps.AddParameter("RequirePrivacy", false);
try
{
System.Collections.ObjectModel.Collection<PSObject> collectionResults = ps.Invoke();
foreach (PSObject psObl in collectionResults)
{
Console.WriteLine("Status : {0}", psObl.Members["Status"].Value.ToString());
Console.WriteLine("Local Path : {0}", psObl.Members["LocalPath"].Value.ToString());
Console.WriteLine("Remote Path : {0}\n", psObl.Members["RemotePath"].Value.ToString());
}
}
catch (ParameterBindingException pbe)
{
System.Console.WriteLine("\rNew-SmbGlobalMapping error : {0}: {1}",
pbe.GetType().FullName, pbe.Message);
}
}
// To get and remove the test mapping in PowerShell :
// Get-SmbGlobalMapping
// Remove-SmbGlobalMapping -RemotePath "\\DESKTOP-EOPIFM5\Windows 7" -Force