Use Command Line with C#

Question

In my work I use the command line, and wanted to improve the work in my company. To do this, I thought of creating a program in C# for people who do not know how to work with command line.

I thought I’d put a button to open a file CNF, and with another button (embeds the command), and saved in file CSR desktop.

That is, the button would open the command line and put the following formula:

cd desktop
openssl -req -new -config cert.cnf -out "cert.csr" out. 

That is, the file Myfile.csr will be on the desktop, and through the command line, will modify to Myfile.cnf.

Suggestions?

Answer 1

You want to do the same procedure cmd within an application written in c#? If this is it, then you can use System.Diagnostics.Process.

You will have to unite the command cd with the openssl using the &, see an example:

System.Diagnostics.Process process = new System.Diagnostics.Process();
System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();

//Oculta cmd
startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;

//Chama CMD
startInfo.FileName = "cmd.exe";

//seu comando
startInfo.Arguments = "/C cd Desktop& openssl \"myfile.csr\" -req -new -config myfile.cnf out.";

process.StartInfo = startInfo;
process.Start();

To simplify you can pass the arguments by Start(), as per this response from Soen:

const string strCmdText = "/C cd Desktop& openssl \"myfile.csr\" -req -new -config myfile.cnf out.";
...
process.Start("CMD.exe", strCmdText);

Answer 2

Follows a variant of the code posted by Guilherme Nascimento:

public void ExecutarComandoSSL(string arquivoCNF, string arquivoCSR) {
    using (System.Diagnostics.Process processo = new System.Diagnostics.Process()) {
        processo.StartInfo.FileName = Environment.GetEnvironmentVariable("comspec");
        processo.StartInfo.WorkingDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
        processo.StartInfo.Arguments = string.Format("/c openssl req -new -config {0} -out \"{1}\"", arquivoCNF, arquivoCSR);

        //processo.StartInfo.CreateNoWindow = true;
        processo.Start();
        processo.WaitForExit();
    }
}

Note: The command will run in the current user’s desktop directory. Information.

1. Do the following, on the form, put:

   • Two buttons, one to fetch the file CNF, and another to save in format CSR.
   • Put a component OpenFileDialog.

2. Create a class to rescue and save file information:

   public static class VariaveisGlobais 
   {
       public static string CNF { get; set; }
       public static string CSR { get; set; }
   }
   

3. On the button responsible for fetching the file CNF, place:

   DialogResult resposta = openFileDialog1.ShowDialog();
   if (resposta == DialogResult.OK) {
        string arquivo = openFileDialog1.FileName;
   
        VariaveisGlobais.CNF = arquivo;
        VariaveisGlobais.CSR = "cert.csr"; // Leia a sugestão
   }
   

   Suggestion: You can use the component SaveFileDialog to allow the user to save the file in the preferred location.

4. On the button responsible for saving the file in format CSR, place:

   string arquivoCNF = VariaveisGlobais.CNF;
   string arquivoCSR = VariaveisGlobais.CSR;
   
   // Aqui você poderia tratar o conteúdo das variáveis
   ExecutarComandoSSL(arquivoCNF, arquivoCSR);
   

Answer 3

I know it’s late, but I saw the topic and found it interesting, because I went through the same yesterday And for those who are going through the same can solve as follows:

string executavelSSL = "\"C:\\Program Files\\OpenSSL-Win64\\bin\\openssl.exe\"";

Process cmd = new Process();
cmd.StartInfo.FileName = "cmd.exe";
cmd.StartInfo.RedirectStandardInput = true;
cmd.StartInfo.RedirectStandardOutput = true; // Não preciso
cmd.StartInfo.CreateNoWindow = true;
cmd.StartInfo.UseShellExecute = false;
cmd.Start();

cmd.StandardInput.WriteLine("cd " + "ponha aqui seu caminho");
cmd.StandardInput.WriteLine(executavelSSL + " -req -new -config cert.cnf -out \"cert.csr\" out");
cmd.StandardInput.Flush();
cmd.StandardInput.Close();
cmd.WaitForExit();

when the path of openssl is not in the environment variables (and even if it is), in the code I recommend to pass the path of . exe ("C:\caminho_onde_está_instalado\bin\openssl.exe ") instead of openssl 'cause I had some problems with that.

In this case the resulting command will be: "C:\Program Files\OpenSSL-Win64\bin\openssl.exe" -req -new -config cert.cnf -out "cert.csr" out;