(Objective-C) Use HTTPS Client Certificate from .cer and .key Files

Demonstrates how to load a cert + private key from .cer and .key (base64) files and use it for mutual TLS authentication (client-side certificate).

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#import <CkoHttp.h>
#import <CkoCert.h>
#import <CkoPrivateKey.h>
#import <CkoBinData.h>

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

CkoHttp *http = [[CkoHttp alloc] init];

CkoCert *cert = [[CkoCert alloc] init];
CkoPrivateKey *privKey = [[CkoPrivateKey alloc] init];

// Load any type of certificate (.cer, .p7b, .pem, etc.) by calling LoadFromFile.
BOOL success = [cert LoadFromFile: @"qa_data/certs/sample_cert_a.cer"];
if (success != YES) {
    NSLog(@"%@",cert.LastErrorText);
    return;
}

// Load the private key.
CkoBinData *bd = [[CkoBinData alloc] init];
success = [bd LoadFile: @"qa_data/certs/sample_key_a.key"];
success = [privKey LoadAnyFormat: bd password: @"privateKeyPasswordIfNecessary"];
if (success != YES) {
    NSLog(@"%@",privKey.LastErrorText);
    return;
}

// Associate the private key with the cert.
success = [cert SetPrivateKey: privKey];
if (success != YES) {
    NSLog(@"%@",cert.LastErrorText);
    return;
}

// Set the certificate to be used for mutual TLS authentication
// (i.e. sets the client-side certificate for two-way TLS authentication)
success = [http SetSslClientCert: cert];
if (success != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

// At this point, the HTTP object instance is setup with the client-side cert, and any SSL/TLS
// connection will automatically use it if the server demands a client-side cert.