Route Socket Connections through an SSH Object

See more Socket/SSL/TLS Examples

Demonstrates Socket.UseSsh, which configures a socket to route subsequent Connect calls through an already connected and authenticated Ssh object using SSH port forwarding.

#import <CkoSsh.h>
#import <NSString.h>
#import <CkoSocket.h>

BOOL success = NO;

CkoSsh *ssh = [[CkoSsh alloc] init];

//  Connect and authenticate a standalone SSH object.
success = [ssh Connect: @"ssh.example.com" port: [NSNumber numberWithInt: 22]];
if (success == NO) {
    NSLog(@"%@",ssh.LastErrorText);
    return;
}

//  The SSH password should come from a secure source rather than being hard-coded.
NSString *sshPassword = @"mySshPassword";
success = [ssh AuthenticatePw: @"sshUser" password: sshPassword];
if (success == NO) {
    NSLog(@"%@",ssh.LastErrorText);
    return;
}

CkoSocket *socket = [[CkoSocket alloc] init];

//  Route subsequent Connect calls through the already connected and authenticated SSH object.  The
//  destination is reached by SSH port forwarding rather than by a direct TCP connection.
success = [socket UseSsh: ssh];
if (success == NO) {
    NSLog(@"%@",socket.LastErrorText);
    return;
}

//  Connect to the destination through the SSH tunnel.
BOOL bTls = NO;
int maxWaitMs = 5000;
success = [socket Connect: @"db.internal" port: [NSNumber numberWithInt: 5432] ssl: bTls maxWaitMs: [NSNumber numberWithInt: maxWaitMs]];
if (success == NO) {
    NSLog(@"%@",socket.LastErrorText);
    return;
}

NSLog(@"%@",@"Connected to the destination through the SSH tunnel.");