(Objective-C) PC/SC List Smart Card Readers (and USB Tokens)

See more SCard Examples

Demonstrates how to list the smart card readers and USB tokens connected to the computer.

Note: This functionality was introduced in Chilkat v9.5.0.87.

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#import <CkoSCard.h>
#import <CkoStringTable.h>

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

CkoSCard *scard = [[CkoSCard alloc] init];

// First establish a context to the PC/SC Resource Manager
BOOL success = [scard EstablishContext: @"user"];
if (success == NO) {
    NSLog(@"%@",scard.LastErrorText);
    return;
}

CkoStringTable *stReaders = [[CkoStringTable alloc] init];
success = [scard ListReaders: stReaders];
if (success == NO) {
    NSLog(@"%@",scard.LastErrorText);
    return;
}

int numReaders = [stReaders.Count intValue];
int i = 0;
while (i < numReaders) {
    NSLog(@"%d%@%@",i,@": ",[stReaders StringAt: [NSNumber numberWithInt: i]]);
    i = i + 1;
}

// Sample output:
// 0: Alcor Micro USB Smart Card Reader 0
// 1: FS USB Token 0
// 2: FT Java Token 0
// 3: SCM Microsystems Inc. SCR33x USB Smart Card Reader 0
// 4: Yubico YubiKey OTP+FIDO+CCID 0

// Applications should always release the context when finished.
success = [scard ReleaseContext];
if (success == NO) {
    NSLog(@"%@",scard.LastErrorText);
}