Objective-C

Load an Encrypted Private Key from a PEM File

Demonstrates the Chilkat PrivateKey.LoadEncryptedPemFile method, which loads a private key from a file, using a password when the key is encrypted. The first argument is the file path and the second is the password.

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: The file-based encrypted loader — the natural choice for a .pem key stored with a passphrase, as most deployment keys are. It decrypts encrypted PKCS #8 PEM and also accepts unencrypted files, so it works whether or not the specific file is protected. Supply the passphrase from a secure source.

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Objective-C

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

BOOL success = NO;

//  Demonstrates the PrivateKey.LoadEncryptedPemFile method, which loads a private key from a file,
//  using a password when the key is encrypted.  The 1st argument is the file path and the 2nd is
//  the password.

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";

success = [privKey LoadEncryptedPemFile: @"qa_data/private_encrypted.pem" password: password];
if (success == NO) {
    NSLog(@"%@",privKey.LastErrorText);
    return;
}

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