Zig

ScMinidriver - Import Private Key to Smart Card

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Demonstrates how to import a private key to the "signature" or "key exchange" location in the Nth key container on a smart card. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

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

    // Chilkat recommends the following free tool for interactively examining the contents of your smart card
    // through the ScMinidriver interface:  MGTEK Tool for Minidriver enabled Smart Cards

    // Let's first look at our smart card before importing a private key.
    // Here's the view of our Gemalto (Thales) IDPrime MD T=0 smart card in the MGTEK tool:

    // (image:https://example-code.com/images/gemalto_idprime_md_t0.JPG/endImage)

    // First let's load a private key into the Chilkat private key object.
    // (Chilkat provides the ability to load private keys from many different sources and formats.
    // this example loads from a PEM file.)
    const priv_key = try chilkat.PrivateKey.init();
    defer priv_key.deinit();
    priv_key.loadPemFile("qa_data/rsa/rsaPrivKey_pkcs8.pem") catch {
        std.debug.print("{s}\n", .{try priv_key.getLastErrorText(alloc)});
        return;
    };

    const scmd = try chilkat.ScMinidriver.init();
    defer scmd.deinit();

    // First we need to acquire a context to the smart card in the reader where it is inserted.
    // Reader names (smart card readers or USB tokens) can be discovered
    // via List Readers or Find Smart Cards
    const reader_name = "Alcor Micro USB Smart Card Reader 0";
    scmd.acquireContext(reader_name) catch {
        std.debug.print("{s}\n", .{try scmd.getLastErrorText(alloc)});
        return;
    };

    // If successful, the name of the currently inserted smart card is available:
    std.debug.print("Card name: {s}\n", .{try scmd.getCardName(alloc)});

    // To import a private key, we'll need to be PIN authenticated.
    // For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
    const pin_id = "user";
    const retval = scmd.pinAuthenticate(pin_id, "0000");
    if (retval != 0) {
        std.debug.print("PIN Authentication failed.\n", .{});
        scmd.deleteContext() catch {};
        return;
    }

    // Let's import into the "key exchange" position in key container #7.
    scmd.importKey(7, "kex", priv_key, "user") catch {
        std.debug.print("PIN Authentication failed.\n", .{});
        scmd.deleteContext() catch {};
        return;
    };

    scmd.deleteContext() catch {};

    std.debug.print("Success.\n", .{});

    // Here's the MGTEK view of the smart card after importing the private key:
    // (image:https://example-code.com/images/gemalto_idprime_after_key_import.JPG/endImage)
}