C#

SSH Public Key Authentication

See more SSH Examples

Demonstrates how to authenticate with an SSH server using public key authentication. C#

bool success = false;

//  This example assumes the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

Chilkat.Ssh ssh = new Chilkat.Ssh();

//  Set some timeouts, in milliseconds:
ssh.ConnectTimeoutMs = 5000;
ssh.IdleTimeoutMs = 15000;

//  Connect to the SSH server.  
//  The standard SSH port = 22
//  The hostname may be a hostname or IP address.
string hostname = "sftp.example.com";
int port = 22;
success = ssh.Connect(hostname,port);
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

Chilkat.SshKey key = new Chilkat.SshKey();

//  Read the PEM file into a string variable:
//  (This does not load the PEM file into the key.  The LoadText
//  method is a convenience method for loading the full contents of ANY text
//  file into a string variable.)
string privKey = key.LoadText("myPrivateKey.pem");
if (key.LastMethodSuccess != true) {
    Debug.WriteLine(key.LastErrorText);
    return;
}

//  Load a private key from a PEM string:
//  (Private keys may be loaded from OpenSSH and Putty formats.
//  Both encrypted and unencrypted private key file formats
//  are supported.  This example loads an unencrypted private
//  key in OpenSSH format.  PuTTY keys typically use the .ppk
//  file extension, while OpenSSH keys use the PEM format.
//  (For PuTTY keys, call FromPuttyPrivateKey instead.)
success = key.FromOpenSshPrivateKey(privKey);
if (success != true) {
    Debug.WriteLine(key.LastErrorText);
    return;
}

//  Authenticate with the SSH server using the login and
//  private key.  (The corresponding public key should've 
//  been installed on the SSH server beforehand.)
success = ssh.AuthenticatePk("myLogin",key);
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

Debug.WriteLine(ssh.LastErrorText);
Debug.WriteLine("Public-Key Authentication Successful!");