(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.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

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

// 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.
BOOL success = [rsa GenerateKey: [NSNumber numberWithInt: 1024]];
if (success != YES) {
    NSLog(@"%@",rsa.LastErrorText);
    return;
}

// Get the private key as unencrypted XML:
NSString *keyXml = [rsa ExportPrivateKey];
NSLog(@"%@",keyXml);

// To encrypt the key -- meaning to get the key in
// an encrypted PEM format -- load it into a PrivateKey object,
// and then export to encrypted PEM:
CkoPrivateKey *privKey = [[CkoPrivateKey alloc] init];

success = [privKey LoadXml: keyXml];
if (success != YES) {
    NSLog(@"%@",privKey.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