Objective-C

SSH Authenticate with Password and Private Key

Demonstrates the Chilkat Ssh.AuthenticatePwPk method, which authenticates with a server that requires both a password and a private key. The first argument is the username, the second is the password, and the third is an SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

Background: Most servers require either a password or a public key, not both — but some high-security configurations mandate multi-factor SSH, combining something you know (the password) with something you have (the key). This method satisfies that policy in one call. As always, the password should come from a secure source rather than a literal in code.

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Objective-C

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

BOOL success = NO;

//  Demonstrates the Ssh.AuthenticatePwPk method, which authenticates with a server that requires
//  BOTH a password and a private key.  The 1st argument is the username, the 2nd is the
//  password, and the 3rd is an SshKey private key.

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

//  Connect to the SSH server.  Port 22 is the usual SSH port.
int sshPort = 22;
success = [ssh Connect: @"ssh.example.com" port: [NSNumber numberWithInt: sshPort]];
if (success == NO) {
    NSLog(@"%@",ssh.LastErrorText);
    return;
}

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
NSString *password = @"mySshPassword";

//  Load the SSH private key.  LoadText reads the file's text, which is then imported.
CkoSshKey *privKey = [[CkoSshKey alloc] init];
NSString *keyStr = [privKey LoadText: @"qa_data/id_rsa"];
if (privKey.LastMethodSuccess == NO) {
    NSLog(@"%@",privKey.LastErrorText);
    return;
}

success = [privKey FromOpenSshPrivateKey: keyStr];
if (success == NO) {
    NSLog(@"%@",privKey.LastErrorText);
    return;
}

success = [ssh AuthenticatePwPk: @"mySshLogin" password: password privateKey: privKey];
if (success == NO) {
    NSLog(@"%@",ssh.LastErrorText);
    return;
}

NSLog(@"%@",@"Authenticated with password and private key.");

[ssh Disconnect];