Objective-C

Load a Private Key from BinData (Any Format)

Demonstrates the Chilkat PrivateKey.LoadAnyFormat method, which loads a private key by inspecting the bytes in a BinData. The first argument is the BinData and the second is the password (used if the detected key is encrypted).

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own key file.

Background: When you have key bytes in memory but do not know their exact format — downloaded, decrypted, or pulled from a database — this figures it out for you, recognizing PKCS #1/#8 DER, encrypted PKCS #8, PEM, JWK, Chilkat XML, Microsoft formats, and more. It removes the guesswork of choosing a specific loader, at the small cost of the detection step. Supply the password so it can decrypt an encrypted key without a second call.

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Objective-C

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

BOOL success = NO;

//  Demonstrates the PrivateKey.LoadAnyFormat method, which loads a private key by inspecting the
//  bytes in a BinData.  The 1st argument is the BinData and the 2nd is the password (used if the
//  detected key is encrypted).

CkoBinData *bd = [[CkoBinData alloc] init];
success = [bd LoadFile: @"qa_data/some_private_key"];
if (success == NO) {
    NSLog(@"%@",bd.LastErrorText);
    return;
}

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

//  The key password is not hard-coded in a real application; obtain it from an interactive
//  prompt, environment variable, or a secrets vault.
NSString *password = @"myKeyPassword";

//  Chilkat auto-detects the representation: PKCS #1/#8 DER, encrypted PKCS #8, PEM, JWK,
//  Chilkat XML, Microsoft formats, and more.
success = [privKey LoadAnyFormat: bd password: password];
if (success == NO) {
    NSLog(@"%@",privKey.LastErrorText);
    return;
}

NSLog(@"%@%@%@",@"Loaded a ",privKey.KeyType,@" private key.");