(Objective-C) Get Base64 Public Key from Private Key

Demonstrates how to get the public key in base64 format from a private key.

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

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

BOOL success = NO;

// Load a private key from base64.
CkoBinData *bd = [[CkoBinData alloc] init];
success = [bd AppendEncoded: @"MHQCA....n0Q==" encoding: @"base64"];

CkoPrivateKey *privKey = [[CkoPrivateKey alloc] init];
success = [privKey LoadAnyFormat: bd password: @""];
if (success == NO) {
    NSLog(@"%@",privKey.LastErrorText);
    return;
}

CkoPublicKey *pubKey = [[CkoPublicKey alloc] init];
[privKey ToPublicKey: pubKey];

NSString *pubKeyBase64 = [pubKey GetEncoded: YES encoding: @"base64"];
NSLog(@"%@",pubKeyBase64);