The following sample demonstrates the RSA/DSA keypair generation feature of SharpSSH. It asks the user for a passphrase and a location of the output_keyfile.
If everything works fine, you it will generate the DSA or RSA keypair files named 'output_keyfile' and 'output_keyfile.pub'. The private and public key files are in the OpenSSH file format.
View the latest versison of this file here.
KeyGen.cs
using System;
using Tamir.SharpSsh.jsch;
/* KeyGen.cs
* ====================================================================
* The following example was posted with the original JSch java library,
* and is translated to C# to show the usage of SharpSSH JSch API
* ====================================================================
* */
namespace sharpSshTest.jsch_samples
{
/// <summary>
/// This progam will demonstrate the RSA/DSA keypair generation.
/// You will be asked a passphrase for output_keyfile.
/// If everything works fine, you will get the DSA or RSA keypair,
/// output_keyfile and output_keyfile+".pub".
/// The private key and public key are in the OpenSSH format.
/// </summary>
public class KeyGen
{
public static void RunExample(params string[] arg)
{
if(arg.Length<3)
{
Console.Error.WriteLine(
"usage: java KeyGen rsa output_keyfile comment\n"+
" java KeyGen dsa output_keyfile comment");
return;
}
try
{
//Get sig type ('rsa' or 'dsa')
String _type=arg[0];
int type=0;
if(_type.Equals("rsa")){type=KeyPair.RSA;}
else if(_type.Equals("dsa")){type=KeyPair.DSA;}
else
{
Console.Error.WriteLine(
"usage: java KeyGen rsa output_keyfile comment\n"+
" java KeyGen dsa output_keyfile comment");
return;
}
//Output file name
String filename=arg[1];
//Signature comment
String comment=arg[2];
//Create a new JSch instance
JSch jsch=new JSch();
//Prompt the user for a passphrase for the private key file
String passphrase=InputForm.GetUserInput("Enter passphrase (empty for no passphrase)", true);
//Generate the new key pair
KeyPair kpair=KeyPair.genKeyPair(jsch, type);
//Set a passphrase
kpair.setPassphrase(passphrase);
//Write the private key to "filename"
kpair.writePrivateKey(filename);
//Write the public key to "filename.pub"
kpair.writePublicKey(filename+".pub", comment);
//Print the key fingerprint
Console.WriteLine("Finger print: "+kpair.getFingerPrint());
//Free resources
kpair.dispose();
}
catch(Exception e)
{
Console.WriteLine(e);
}
return;
}
}
}