libnitrokey

libnitrokey provides access to Nitrokey Pro and Nitrokey Storage devices. This documentation describes libnitrokey's C API. For a list of the available functions, see the NK_C_API.h file.

Example

#include <stdio.h>
#include <stdlib.h>
#include <libnitrokey/NK_C_API.h>
 
int main(void)
{
        if (NK_login_auto() != 1) {
                fprintf(stderr, "No Nitrokey found.\n");
                return 1;
        }
 
        NK_device_model model = NK_get_device_model();
        printf("Connected to ");
        switch (model) {
        case NK_PRO:
                printf("a Nitrokey Pro");
                break;
        case NK_STORAGE:
                printf("a Nitrokey Storage");
                break;
        case NK_LIBREM:
                printf("a Librem Key");
                break;
        default:
                printf("an unsupported Nitrokey");
                break;
        }
 
        char* serial_number = NK_device_serial_number();
        if (serial_number)
            printf(" with serial number %s\n", serial_number);
        else
            printf(" -- could not query serial number!\n");
        free(serial_number);
 
        NK_logout();
        return 0;
}