CODEWITHSUNDEEP
c#apiasp.net-core.net-corefilestream
Nader Gliza
Nader Gliza

Reputation: 13

how to use network credential to connect share folder somewhere in the network?

this is my code and I want to know how to use network credentials in my code

 string filePath = Path.Combine(@"\\192.168.5.90\uploads", newfilename);                
     using (var filestream = new FileStream(filePath, FileMode.Create,FileAccess.Write))
     {
      await uploadfile.CopyToAsync(filestream);
     }
      return Ok(newfilename);

Upvotes: 1

Views: 9793

Answers (2)

Emel KIRIMLI
Emel KIRIMLI

Reputation: 14

you can use this link

You can use a impersonator instead:

using (var impersonator = new Impersonator(username, password))
{
    File.Copy(source, destination, true);
}

this is a copy past from our implementation, so please adjust your domain name

using System;
using System.Runtime.InteropServices;
using System.Security.Principal;

public class Impersonator : IDisposable
{
/// <summary>
///     The Impersonator class is used to access a network share with other credentials.
/// </summary>
private readonly WindowsImpersonationContext _impersonatedUser;

private readonly IntPtr _userHandle;

/// <summary>
///     Constructor
/// </summary>
/// <param name="username">The user of the network share</param>
/// <param name="password">The password of the network share</param>
public Impersonator(string username, string password, string userDomain =   "YOURDOMAIN")
{
    _userHandle = new IntPtr(0);
    bool returnValue = LogonUser(username, userDomain, password, LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT,
                                 ref _userHandle);
    if (!returnValue)
        throw new ApplicationException(
            "The applications wasn't able to impersonate the user with the specified credentials!");
    var newId = new WindowsIdentity(_userHandle);
    _impersonatedUser = newId.Impersonate();
}

#region IDisposable Members

public void Dispose()
{
    if (_impersonatedUser != null)
    {
        _impersonatedUser.Undo();
        CloseHandle(_userHandle);
    }
}

#endregion

#region Interop imports/constants

public const int LOGON32_LOGON_INTERACTIVE = 2;
public const int LOGON32_LOGON_SERVICE = 3;
public const int LOGON32_PROVIDER_DEFAULT = 0;

[DllImport("advapi32.dll", CharSet = CharSet.Auto)]
public static extern bool LogonUser(String lpszUserName, String lpszDomain, String lpszPassword, int dwLogonType,
                                    int dwLogonProvider, ref IntPtr phToken);

[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
public static extern bool CloseHandle(IntPtr handle);

#endregion
}

Upvotes: 0

Nick Goloborodko
Nick Goloborodko

Reputation: 3053

Windows uses the identity of the user running the process of the app for this authentication.

You will need to impersonate an alternative user and execute the code that writes that file in that impersonation context. Look into WindowsIdentity.RunImpersonated method https://learn.microsoft.com/en-us/dotnet/api/system.security.principal.windowsidentity.runimpersonated?view=netcore-3.1

Upvotes: 1

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