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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.

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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.

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

    const pkcs11 = try chilkat.Pkcs11.init();
    defer pkcs11.deinit();

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

    // Use your HSM's PIN.
    const pin = "0000";

    // Normal user = 1
    const user_type = 1;

    // Establish a logged-on user session with the HSM.
    pkcs11.quickSession(user_type, pin) catch {
        std.debug.print("{s}\n", .{try pkcs11.getLastErrorText(alloc)});
        return;
    };

    // Provide a template to find a PKCS11 object.
    const json_template = try chilkat.JsonObject.init();
    defer json_template.deinit();

    // Find an RSA private key with the label "MySshKey".
    // Here's an example of how the key was originally imported:
    // PKCS11 Import SSH Key
    json_template.updateString("class", "private_key") catch {};
    json_template.updateString("key_type", "rsa") catch {};
    json_template.updateString("label", "MySshKey") catch {};

    const priv_key_handle = pkcs11.findObject(json_template);
    if (priv_key_handle == 0) {
        std.debug.print("{s}\n", .{try pkcs11.getLastErrorText(alloc)});
        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:
    std.debug.print("private key handle: {d}\n", .{priv_key_handle});

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

    pkcs11.logout() catch {};
    pkcs11.closeSession() catch {};
}