(Objective-C) Load an Ed25519 Private Key from Hex

Demonstrates how to load an Ed25519 private key from raw hex bytes.

Note: This example requires Chilkat v9.5.0.83 or greater.

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

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

CkoPrivateKey *privKey = [[CkoPrivateKey alloc] init];

// We have the hexidecimal encoded bytes of the private key and public key:
NSString *privKeyHex = @"d4ee72dbf913584ad5b6d8f1f769f8ad3afe7c28cbf1d4fbe097a88f44755842";
NSString *pubKeyHex = @"19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1";

// Load these values into the Chilkat private key object:
BOOL success = [privKey LoadEd25519: privKeyHex pubKey: pubKeyHex];
if (success == NO) {
    NSLog(@"%@",privKey.LastErrorText);
    return;
}

// ---------------------------------------------------------------
// We don't actually need the public key.  If we pass an empty string for the public key,
// Chilkat will automatically compute it.
CkoPrivateKey *privKey2 = [[CkoPrivateKey alloc] init];
success = [privKey2 LoadEd25519: privKeyHex pubKey: @""];

// Let's get the public key to see that it computed the same value.
CkoStringBuilder *sbPubKeyHex = [[CkoStringBuilder alloc] init];
privKeyHex = [privKey2 GetRawHex: sbPubKeyHex];
NSLog(@"%@%@",@"computed public key = ",[sbPubKeyHex GetAsString]);

// The output should be:
// computed public key = 19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1