Merge branch 'development'

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

README.md

@@ -1,6 +1,8 @@
 # Pico FIDO
 This project transforms your Raspberry Pi Pico or ESP32 microcontroller into an integrated FIDO Passkey, functioning like a standard USB Passkey for authentication.
 
+If you are looking for a Fido + OpenPGP, see: https://github.com/polhenarejos/pico-fido2
+
 ## Features
 Pico FIDO includes the following features:
 

src/fido/management.c

@@ -101,6 +101,7 @@ int man_get_config() {
     res_APDU[res_APDU_size++] = TAG_SERIAL;
     res_APDU[res_APDU_size++] = 4;
     memcpy(res_APDU + res_APDU_size, pico_serial.id, 4);
+    res_APDU[res_APDU_size] &= ~0xFC; // Force 8-digit serial number
     res_APDU_size += 4;
     res_APDU[res_APDU_size++] = TAG_FORM_FACTOR;
     res_APDU[res_APDU_size++] = 1;

src/fido/otp.c

@@ -476,6 +476,7 @@ int cmd_otp() {
     }
     else if (p1 == 0x10) {
         memcpy(res_APDU, pico_serial.id, 4);
+        res_APDU[0] &= ~0xFC; // Force 8-digit serial number
         res_APDU_size = 4;
     }
     else if (p1 == 0x13) { // Get config