(Objective-C) Load PEM Public/Private Key into RSA Object

Demonstrates how to load a PEM key into the Chilkat RSA object.

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

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#import <CkoRsa.h>
#import <NSString.h>
#import <CkoPublicKey.h>
#import <CkoPrivateKey.h>

BOOL success = NO;

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

CkoRsa *rsa = [[CkoRsa alloc] init];

// First demonstrate importing a PEM public key:
NSString *publicKeyPem = @"PEM public-key data goes here";
CkoPublicKey *pubkey = [[CkoPublicKey alloc] init];

success = [pubkey LoadFromString: publicKeyPem];
if (success == NO) {
    NSLog(@"%@",pubkey.LastErrorText);
    return;
}

success = [rsa UsePublicKey: pubkey];
if (success == NO) {
    NSLog(@"%@",rsa.LastErrorText);
    return;
}

// Demonstrate importing a PEM private key:
NSString *privateKeyPem = @"PEM private-key data goes here";
CkoPrivateKey *privkey = [[CkoPrivateKey alloc] init];

// If the private key PEM is protected with a password, then 
// call LoadEncryptedPem.  Otherwise call LoadPem.
success = [privkey LoadPem: privateKeyPem];
if (success == NO) {
    NSLog(@"%@",privkey.LastErrorText);
    return;
}

success = [rsa UsePrivateKey: privkey];
if (success == NO) {
    NSLog(@"%@",rsa.LastErrorText);
    return;
}

NSLog(@"%@",@"OK!");