Objective-C

Generate an ECDSA Key

See more ECC Examples

Demonstrates how to generate an ECDSA key. Objective-C

#import <CkoPrng.h>
#import <NSString.h>
#import <CkoEcc.h>
#import <CkoPrivateKey.h>

BOOL success = NO;

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

//  Create a Fortuna PRNG and seed it with system entropy.
//  This will be our source of random data for generating the ECC private key.
CkoPrng *fortuna = [[CkoPrng alloc] init];
NSString *entropy = [fortuna GetEntropy: [NSNumber numberWithInt: 32] encoding: @"base64"];
success = [fortuna AddEntropy: entropy encoding: @"base64"];

CkoEcc *ecc = [[CkoEcc alloc] init];

//  Generate a random ECC private key on the secp256r1 curve.
//  Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256k1.

CkoPrivateKey *privKey = [[CkoPrivateKey alloc] init];
success = [ecc GenKey: @"secp256r1" prng: fortuna privKey: privKey];
if (success == NO) {
    NSLog(@"%@",ecc.LastErrorText);
    return;
}

NSLog(@"%@",[privKey GetXml]);

//  Save the private key to PKCS8 encrypted PEM
//  (The private key can be saved in a variety of different formats. See the online reference documentation.)
success = [privKey SavePkcs8EncryptedPemFile: @"pemPassword" path: @"myPemFiles/eccKey123.pem"];
if (success != YES) {
    NSLog(@"%@",privKey.LastErrorText);
}

NSLog(@"%@",@"finished.");