Objective-C

PKCS11 Find Private Key by Label

See more PKCS11 Examples

Demonstrates how to find a private key based on a user-specified label.

Note: This example requires Chilkat v9.5.0.96 or later.

Objective-C

#import <CkoPkcs11.h>
#import <NSString.h>
#import <CkoJsonObject.h>

BOOL success = NO;

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

//  Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

CkoPkcs11 *pkcs11 = [[CkoPkcs11 alloc] init];

//  Use the PKCS11 driver (.dll, .so, .dylib) for your particular HSM.
//  For example:
pkcs11.SharedLibPath = @"C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS11.dll";

//  Use your HSM's PIN.
NSString *pin = @"0000";

//  Normal user = 1
int userType = 1;

//  Establish a logged-on user session with the HSM.
success = [pkcs11 QuickSession: [NSNumber numberWithInt: userType] pin: pin];
if (success == NO) {
    NSLog(@"%@",pkcs11.LastErrorText);
    return;
}

//  Provide a template to find a PKCS11 object.
CkoJsonObject *jsonTemplate = [[CkoJsonObject alloc] init];

//  Find an RSA private key with the label "MySshKey".
//  Here's an example of how the key was originally imported: 
//  PKCS11 Import SSH Key
[jsonTemplate UpdateString: @"class" value: @"private_key"];
[jsonTemplate UpdateString: @"key_type" value: @"rsa"];
[jsonTemplate UpdateString: @"label" value: @"MySshKey"];

unsigned long privKeyHandle = [pkcs11 FindObject: jsonTemplate];
if (privKeyHandle == 0) {
    NSLog(@"%@",pkcs11.LastErrorText);
    return;
}

//  The private key handle is only valid during the PKCS11 session.
//  If you wish to use the private key in another PKCS11 session,
//  you'll first need to find it.  See:  
NSLog(@"%@%d",@"private key handle: ",privKeyHandle);

//  Do whatever you wish with the private key handle...
//  ...
//  ...

[pkcs11 Logout];
[pkcs11 CloseSession];