Objective-C

Set an FTPS Client Certificate from PEM

Demonstrates the Chilkat Ftp2.SetSslClientCertPem method, which configures a client certificate and private key from PEM. The first argument may be the PEM text or a PEM file path, and the second is the private-key password (empty when the key is not encrypted).

Note: The local paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This is the PEM-based form of setting the mutual-TLS client certificate — convenient when the certificate and key already live in a .pem file, the common format from OpenSSH and Unix tooling. Use SetSslClientCertPfx instead for a PKCS#12 .pfx/.p12 bundle. As with any client certificate, set it before connecting.

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Objective-C

#import <CkoFtp2.h>
#import <NSString.h>

BOOL success = NO;

//  Demonstrates the Ftp2.SetSslClientCertPem method, which configures a client certificate and
//  private key from PEM.  The 1st argument is the PEM text or a PEM file path, and the 2nd is the
//  private-key password (empty when the key is not encrypted).

CkoFtp2 *ftp = [[CkoFtp2 alloc] init];

ftp.Hostname = @"ftp.example.com";
ftp.Username = @"myFtpLogin";

//  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.
ftp.Password = @"myPassword";

//  Use explicit FTPS (AUTH TLS) on the standard FTP port.
ftp.AuthTls = YES;

//  Provide the PEM client certificate before connecting.  The password should come from a secure
//  source rather than being hard-coded.
NSString *pemPassword = @"myPemPassword";
success = [ftp SetSslClientCertPem: @"qa_data/client.pem" pemPassword: pemPassword];
if (success == NO) {
    NSLog(@"%@",ftp.LastErrorText);
    return;
}

success = [ftp Connect];
if (success == NO) {
    NSLog(@"%@",ftp.LastErrorText);
    return;
}

NSLog(@"%@",@"Connected with a PEM client certificate.");

success = [ftp Disconnect];
if (success == NO) {
    NSLog(@"%@",ftp.LastErrorText);
    return;
}