Saving SecKeyRef device generated public/private key pair on disk

Question

I\'ve generated an RSA symmetric key pair on a device using SecKeyGeneratePair() on a device. I have SecKeyRef struct pointers for each key. So, ho

Answer 1

You can use the latest crypto API of iOS, You can save the key as NSData and retrieve the key from NSData

SecKeyRef key = <# a key #>;
CFErrorRef error = NULL;
NSData* keyData = (NSData*)CFBridgingRelease(  // ARC takes ownership
                       SecKeyCopyExternalRepresentation(key, &error)
                   );
if (!keyData) {
    NSError *err = CFBridgingRelease(error);  // ARC takes ownership
    // Handle the error. . .
}

https://developer.apple.com/documentation/security/certificate_key_and_trust_services/keys/storing_keys_as_data?language=objc