(Objective-C) Generate RSA Key and Export to Encrypted PEM

Objective-C sample showing how to generate an RSA key and export to encrypted PEM.

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;

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

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

// Generate a 1024-bit key.  Chilkat RSA supports
// key sizes ranging from 512 bits to 4096 bits.
CkoPrivateKey *privKey = [[CkoPrivateKey alloc] init];
success = [rsa GenKey: [NSNumber numberWithInt: 1024] privKey: privKey];
if (success == NO) {
    NSLog(@"%@",rsa.LastErrorText);
    return;
}

NSString *strEncPem = 0;
strEncPem = [privKey GetPkcs8EncryptedPem: @"myPassword"];

// You now have the private key in an encrypted format,
// which may be (for example) saved to a database.

NSLog(@"%@",strEncPem);