(Objective-C) Load P7B and List Certificates

Demonstrates how to load a .p7b containing certificates and accesses each individual certificate.

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#import <CkoGlobal.h>
#import <CkoPem.h>
#import <CkoCert.h>

// Unlock the Chilkat API.
// Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
// by calling UnlockBundle.  It requires a Bundle unlock code.
CkoGlobal *chilkatGlob = [[CkoGlobal alloc] init];
BOOL success = [chilkatGlob UnlockBundle: @"Anything for 30-day trial."];
if (success != YES) {
    NSLog(@"%@",chilkatGlob.LastErrorText);
    return;
}

CkoPem *pem = [[CkoPem alloc] init];

// Load the .p7b from a file.
success = [pem LoadP7bFile: @"/Users/chilkat/testData/p7b/myCerts.p7b"];
if (success != YES) {
    NSLog(@"%@",pem.LastErrorText);
    return;
}

int i;
int numCerts = [pem.NumCerts intValue];
if (numCerts == 0) {
    NSLog(@"%@",(@"Error: Expected the .p7b to contain certificates."));
    return;
}

// Access each certificate and show the DN (Distinguished Name)
for (i = 1; i <= numCerts; i++) {
    CkoCert *cert = [pem GetCert: [NSNumber numberWithInt: (i - 1)]];
    NSLog(@"%d%@%@",i,@": ",cert.SubjectDN);

}