How to Run a .NET Process as a Different User Using Impersonation?

Start a .NET process as a different user through impersonation

Through simulation, you can start the process with administrator privileges. Impersonation allows a process to run as a different user with elevated privileges.

Simulation auxiliary class

The code you provide utilizes the ImpersonationHelper class to impersonate a user with the required credentials. This class establishes an access token and impersonates the specified user, granting the process the necessary permissions to run as administrator.

public ImpersonationHelper(string domain, string user, string password)
{
    // 调用 LogonUser 获取访问令牌的句柄。
    bool returnValue = LogonUser(user, domain, password,
        LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT,
        ref m_tokenHandle);
    if (false == returnValue)
    {
        int ret = Marshal.GetLastWin32Error();
        throw new System.ComponentModel.Win32Exception(ret);
    }

    // 模拟
    m_impersonatedUser = new WindowsIdentity(m_tokenHandle).Impersonate();
}

Start process

Within the using block, activate the simulation. Subsequently, the Process class is used to start a new process with the specified filename as argument.

using (new ImpersonationHelper("xxx.blabla.com", "xxxx", "xxxx"))
{
    if (!string.IsNullOrEmpty(txtFilename.Text))
        Process.Start(txtFilename.Text);
}

An alternative to using safe strings

Alternatively, you can start the process as a different user by manually setting the StartInfo attribute as follows:

System.Diagnostics.Process proc = new System.Diagnostics.Process();
System.Security.SecureString ssPwd = new System.Security.SecureString();
proc.StartInfo.UseShellExecute = false;
proc.StartInfo.FileName = "filename";
proc.StartInfo.Arguments = "args...";
proc.StartInfo.Domain = "domainname";
proc.StartInfo.UserName = "username";
string password = "用户输入的密码";
for (int x = 0; x < password.Length; x++)
{
    ssPwd.AppendChar(password[x]);
}
password = "";
proc.StartInfo.Password = ssPwd;
proc.Start();

By providing SecureString for the password, you ensure that the password is handled securely and is not stored in clear text memory.

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