(Objective-C) Generate RSA Key and return Base64 PKCS8 Private Key

Demonstrates how to generate a new 2048-bit RSA private key and returns the Base64 encoded PKCS8 representation of the private key.

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

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

BOOL success = NO;

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

// Generate a 2048-bit key.  Chilkat RSA supports
// key sizes ranging from 512 bits to 8192 bits.
CkoPrivateKey *privKey = [[CkoPrivateKey alloc] init];
success = [rsa GenKey: [NSNumber numberWithInt: 2048] privKey: privKey];
if (success == NO) {
    NSLog(@"%@",rsa.LastErrorText);
    return;
}

// Get the private key in PKCS8 Base64 format
NSString *privKeyPkcs8Base64 = [privKey GetPkcs8ENC: @"base64"];

// The key in base64 format will start similar to this:
// MIIEvAIBADANBgkqhkiG9w0BA...
NSLog(@"%@",privKeyPkcs8Base64);