(Objective-C) Iterate Keys and Certs in PEM

Demonstrates how to access each of the private keys and certs contained within a PEM.

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

// 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;
}

// The Chilkat PEM class was introduced in v9.5.0.49.  
// It requires the bundle to be unlocked, as shown above.
CkoPem *pem = [[CkoPem alloc] init];

// Load the PEM from a file.
// If the PEM is encrypted, provide a password.  Otherwise pass an empty string for the password.
NSString *password = @"myPassword";
success = [pem LoadPemFile: @"../myPemFiles/myPem.pem" password: password];
if (success != YES) {
    NSLog(@"%@",pem.LastErrorText);
    return;
}

// Note: If the app already has the PEM pre-loaded in a string variable, then load it 
// by calling LoadPem instead.  
NSString *pemContent = @"... the PEM contents ...";
success = [pem LoadPem: pemContent password: password];
// Check for success as before..

// Iterate over the private keys.
int numPrivateKeys = [pem.NumPrivateKeys intValue];
int i = 0;

while (i < numPrivateKeys) {

    CkoPrivateKey *privKey = [pem GetPrivateKey: [NSNumber numberWithInt: i]];
    NSLog(@"%@%d%@%d%@",@"Private Key ",i,@" is ",[privKey.BitLength intValue],@" in length");

    i = i + 1;
}

// Iterate over the certificates.
int numCerts = [pem.NumCerts intValue];
i = 0;

while (i < numCerts) {

    CkoCert *cert = [pem GetCert: [NSNumber numberWithInt: i]];
    NSLog(@"%@%d%@%@",@"Certificate ",i,@" : ",cert.SubjectDN);

    i = i + 1;
}