(Objective-C) Authenticode Sign using Smartcard or USB Token

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Demonstrates how to Authenticode sign an EXE or DLL using a smartcard or USB token, such as a Yubikey.

Note: Chilkat's code signing class was added in v9.5.0.97

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#import <CkoJsonObject.h>
#import <CkoCert.h>
#import <NSString.h>
#import <CkoCodeSign.h>

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

BOOL success;

// First create the following JSON to specify that SHA256 is to be used,
// and provide timestamp server information.

// {
//   "hashAlg": "sha256",
//   "timestampToken": {
//     "enabled": true,
//     "tsaUrl": "http://timestamp.digicert.com",
//     "requestTsaCert": true,
//     "hashAlg": "sha256"
//   }
// }

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"hashAlg" value: @"sha256"];
[json UpdateBool: @"timestampToken.enabled" value: YES];
[json UpdateString: @"timestampToken.tsaUrl" value: @"http://timestamp.digicert.com"];
[json UpdateBool: @"timestampToken.requestTsaCert" value: YES];
[json UpdateString: @"timestampToken.hashAlg" value: @"sha256"];

// The only difference in signing with a smartcard or USB token
// is that the cert is loaded from a smartcard or USB token, instead of a PFX or from elsewhere
// such as from the Windows certificate store.
CkoCert *cert = [[CkoCert alloc] init];

// Yubico YubiKey OTP+FIDO+CCID 0, default PIN = 123456
cert.SmartCardPin = @"123456";

// Assuming you have the Yubikey inserted into the USB on the computer...
// and there is only 1 signing certificate on the Yubikey, then just load from
// the "smartcard".  (assuming you don't have additional smartcards or USB tokens plugged in)
success = [cert LoadFromSmartcard: @""];
if (success == NO) {
    NSLog(@"%@",cert.LastErrorText);
    return;
}

// If the smartcard/token has several possible certificates that can be used for signing,
// then see the online documentation for the LoadFromSmartcard method,
// and also see the online documentation and examples for Chilkat Pkcs11 and ScMinidriver.
// There are many possible ways to load a Chilkat certificate object with a cert (and associated private key)
// from a variety of sources.  The only coding difference for any signing function in Chilkat,
// whether it be a PDF, XmlDSig, CMS, etc. is in how the cert is loaded.

// You can sign .exe or .dll files.
NSString *exePath = @"C:/someOtherDir/HelloWorld.exe";

CkoCodeSign *signer = [[CkoCodeSign alloc] init];

// If successful, the following call will apply the signature to the EXE (or DLL).
success = [signer AddSignature: exePath cert: cert options: json];
if (success == NO) {
    NSLog(@"%@",signer.LastErrorText);
    return;
}

NSLog(@"%@",@"Successfully applied the Authenticode signature.");