Add nk3-change-pin command

src/main.c

@@ -23,6 +23,7 @@
 #include "operations.h"
 #include "return_codes.h"
 #include "utils.h"
+#include "operations_ccid.h"
 #include "version.h"
 #include <stdio.h>
 #include <string.h>
@@ -38,8 +39,9 @@ void print_help(char *app_name) {
            "\t%s version\n"
            "\t%s check <HOTP CODE>\n"
            "\t%s regenerate <ADMIN PIN>\n"
-           "\t%s set <BASE32 HOTP SECRET> <ADMIN PIN> [COUNTER]\n",
-           app_name, app_name, app_name, app_name, app_name, app_name);
+           "\t%s set <BASE32 HOTP SECRET> <ADMIN PIN> [COUNTER]\n"
+           "\t%s nk3-change-pin <old-pin> <new-pin>\n",
+           app_name, app_name, app_name, app_name, app_name, app_name, app_name);
 }
 
 
@@ -144,6 +146,10 @@ int parse_cmd_and_run(int argc, char *const *argv) {
                 if (argc != 3) break;
                 res = check_code_on_device(&dev, argv[2]);
                 break;
+            case 'n':
+                if (strcmp(argv[1], "nk3-change-pin") != 0 || argc != 4) break;
+                res = nk3_change_pin(&dev, argv[2], argv[3]);
+                break;
             case 's':
                 if (argc != 4 && argc != 5) break;
                 {

src/operations_ccid.c

@@ -63,6 +63,59 @@ int set_pin_ccid(struct Device *dev, const char *admin_PIN) {
     return 0;
 }
 
+int nk3_change_pin(struct Device *dev, const char *old_pin, const char*new_pin) {
+    libusb_device *usb_dev;
+    struct libusb_device_descriptor usb_desc;
+
+    if (!dev->mp_devhandle_ccid) {
+        return RET_NO_ERROR;    
+    }
+
+    usb_dev = libusb_get_device(dev->mp_devhandle_ccid);
+
+    int r = libusb_get_device_descriptor(usb_dev, &usb_desc);
+
+    if (r < 0) {
+        return r;
+    }
+
+
+    if (usb_desc.idVendor != NITROKEY_USB_VID || usb_desc.idProduct != NITROKEY_3_USB_PID) {
+        return RET_NO_ERROR;    
+    }
+
+    TLV tlvs[] = {
+        {
+            .tag = Tag_Password,
+            .length = strnlen(old_pin, MAX_PIN_SIZE_CCID),
+            .type = 'S',
+            .v_str = old_pin,
+        },
+        {
+            .tag = Tag_NewPassword,
+            .length = strnlen(new_pin, MAX_PIN_SIZE_CCID),
+            .type = 'S',
+            .v_str = new_pin,
+        },
+    };
+    // encode
+    uint32_t icc_actual_length = icc_pack_tlvs_for_sending(dev->ccid_buffer_out, sizeof dev->ccid_buffer_out,
+                                                           tlvs, ARR_LEN(tlvs), Ins_ChangePIN);
+    // send
+    IccResult iccResult;
+    r = ccid_process_single(dev->mp_devhandle_ccid, dev->ccid_buffer_in, sizeof dev->ccid_buffer_in,
+                                dev->ccid_buffer_out, icc_actual_length, &iccResult);
+    if (r != 0) {
+        return r;
+    }
+    // check status code
+    if (iccResult.data_status_code != 0x9000) {
+        return 1;
+    }
+
+    return RET_NO_ERROR;
+}
+
 
 int authenticate_ccid(struct Device *dev, const char *admin_PIN) {
     TLV tlvs[] = {

src/operations_ccid.h

@@ -11,6 +11,7 @@ int authenticate_or_set_ccid(struct Device *dev, const char *admin_PIN);
 int set_secret_on_device_ccid(struct Device *dev, const char *admin_PIN, const char *OTP_secret_base32, const uint64_t hotp_counter);
 int verify_code_ccid(struct Device *dev, const uint32_t code_to_verify);
 int status_ccid(libusb_device_handle *handle, struct FullResponseStatus *full_response);
+int nk3_change_pin(struct Device *dev, const char *old_pin, const char*new_pin);
 
 
 #endif//NITROKEY_HOTP_VERIFICATION_OPERATIONS_CCID_H

src/return_codes.c

@@ -55,4 +55,4 @@ int res_to_exit_code(int res) {
     if (res == RET_BADLY_FORMATTED_HOTP_CODE) return EXIT_BAD_FORMAT;
     if (res == RET_CONNECTION_LOST) return EXIT_CONNECTION_LOST;
     return EXIT_OTHER_ERROR;
-}
+}