Change for firmware upgrade and ack-button.

tool/gnuk_get_random.py

@@ -0,0 +1,15 @@
+#! /usr/bin/python3
+
+from gnuk_token import get_gnuk_device, gnuk_token
+from binascii import hexlify
+import sys
+
+if __name__ == '__main__':
+    gnuk = get_gnuk_device()
+    gnuk.cmd_select_openpgp()
+    looping = (len(sys.argv) > 1)
+    while True:
+        challenge = gnuk.cmd_get_challenge().tostring()
+        print(hexlify(challenge))
+        if not looping:
+            break