(Objective-C) Transition from Crypt2.GetSignerCertChain to Crypt2.LastSignerCert

Provides instructions for replacing deprecated GetSignerCertChain method calls with LastSignerCert.

Note: This example requires Chilkat v11.0.0 or greater.

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#import <CkoCrypt2.h>
#import <CkoCertChain.h>
#import <CkoCert.h>

CkoCrypt2 *crypt2 = [[CkoCrypt2 alloc] init];

// ...
// ...
int index = 0;

// ------------------------------------------------------------------------
// The GetSignerCertChain method is deprecated:

CkoCertChain *certchainObj = [crypt2 GetSignerCertChain: [NSNumber numberWithInt: index]];
if (crypt2.LastMethodSuccess == NO) {
    NSLog(@"%@",crypt2.LastErrorText);
    return;
}

// ...
// ...

// ------------------------------------------------------------------------
// Do the equivalent using LastSignerCert, and then get the certificate chain from the cert.
// Your application creates a new, empty Cert object which is passed 
// in the last argument and filled upon success.

CkoCert *signerCert = [[CkoCert alloc] init];
BOOL success = [crypt2 LastSignerCert: [NSNumber numberWithInt: index] cert: signerCert];
if (success == NO) {
    NSLog(@"%@",crypt2.LastErrorText);
    return;
}

CkoCertChain *certChain = [[CkoCertChain alloc] init];
success = [signerCert BuildCertChain: certChain];
if (success == NO) {
    NSLog(@"%@",signerCert.LastErrorText);
    return;
}