(Objective-C) Use Base64 RSA Key to Encrypt

Loads a Base64 RSA key and uses it to encrypt a string, returning the result in base64.

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

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

BOOL success = NO;

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

CkoPublicKey *pubkey = [[CkoPublicKey alloc] init];

success = [pubkey LoadBase64: @"MIICdgIBADA ... A9PXLk+j5A=="];
if (success == NO) {
    NSLog(@"%@",pubkey.LastErrorText);
    return;
}

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

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

rsa.EncodingMode = @"base64";

NSString *encryptedStr = [rsa EncryptStringENC: @"12345678" bUsePrivateKey: NO];

NSLog(@"%@",encryptedStr);