Make mouse demo work

fw/hexnoise.py

@@ -6,6 +6,7 @@ import sys
 from contextlib import contextmanager, suppress, wraps
 import hashlib
 import secrets
+import struct
 
 import serial
 from cobs import cobs
@@ -336,14 +337,19 @@ class NoiseEngine:
                 raise ProtocolError('Invalid report type')
 
     def uinput_passthrough(self):
-        with uinput.Device(KeyMapper.ALL_KEYS) as ui:
+        mouse_foo = [uinput.BTN_LEFT, uinput.BTN_RIGHT, uinput.BTN_MIDDLE,
+                uinput.REL_X, uinput.REL_Y, uinput.REL_WHEEL]
+        with uinput.Device(KeyMapper.ALL_KEYS + mouse_foo) as ui:
             old_kcs = set()
             for msg_type, payload in self.receive_loop():
                 report_len, *report = payload
-                if report_len != 8:
-                    raise ValueError('Unsupported report length', report_len)
+
+                report = bytes(report[:report_len])
 
                 if msg_type is ReportType.KEYBOARD:
+                    if report_len != 8:
+                        raise ValueError('Unsupported report length', report_len)
+
                     modbyte, _reserved, *keycodes = report
                     import binascii
                     keys = { *KeyMapper.map_modifiers(modbyte), *KeyMapper.map_regulars(keycodes) }
@@ -358,8 +364,26 @@ class NoiseEngine:
                     old_kcs = keys
 
                 elif msg_type is ReportType.MOUSE:
-                    # FIXME unhandled
-                    pass
+                    if report_len < 3 or report_len > 8:
+                        raise ValueError('Unsupported report length', report_len)
+                    import binascii
+                    _report_type, buttons, a, b, c, w, _2 = report
+                    x = ((b&0x0f)<<8) | a
+                    y = ((b&0xf0) >> 4) | (c<<4)
+                    if x >= 2048:
+                        x -= 4096
+                    if y >= 2048:
+                        y -= 4096
+                    if w >= 128:
+                        w -= 256
+                    #print('got mouse report', binascii.hexlify(report), buttons, x, y, w)
+                    ui.emit(uinput.BTN_LEFT, bool(buttons&1), syn=False)
+                    ui.emit(uinput.BTN_MIDDLE, bool(buttons&4), syn=False)
+                    ui.emit(uinput.BTN_RIGHT, bool(buttons&2), syn=False)
+                    ui.emit(uinput.REL_X, x, syn=False)
+                    ui.emit(uinput.REL_Y, y, syn=False)
+                    ui.emit(uinput.REL_WHEEL, w, syn=False)
+                    ui.syn()
 
 if __name__ == '__main__':
     import argparse

fw/src/demo.c

@@ -296,6 +296,7 @@ void pairing_input(uint8_t modbyte, uint8_t keycode) {
         case KEY_ENTER:
             pairing_buf[pairing_buf_pos++] = '\0';
             if (!pairing_check(&noise_state, pairing_buf)) {
+                LOG_PRINTF("Pairing success, persisting remote key.\n");
                 persist_remote_key(&noise_state);
                 /* FIXME write key to backup memory */
 
@@ -303,6 +304,8 @@ void pairing_input(uint8_t modbyte, uint8_t keycode) {
                 if (send_encrypted_message(&noise_state, &response, sizeof(response)))
                     LOG_PRINTF("Error sending pairing response packet\n");
 
+                noise_state.failed_handshakes = 0;
+
             } else {
                 /* FIXME sound alarm */
 

fw/src/noise.c

@@ -188,7 +188,7 @@ void uninit_handshake(struct NoiseState *st, enum handshake_state new_state) {
         noise_handshakestate_free(st->handshake);
     st->handshake_state = new_state;
     st->handshake = NULL;
-    arm_key_scrubber();
+    //arm_key_scrubber(); FIXME DEBUG
 }
 
 /*@ 
@@ -291,9 +291,19 @@ int handshake_phase2(struct NoiseState * const st, uint8_t *buf, size_t len) {
     BLAKE2s_update(&bc, st->remote_key, sizeof(st->remote_key));
     BLAKE2s_finish(&bc, remote_fp);
 
+    LOG_PRINTF("Key in memory: ");
+    for (int i=0; i<BLAKE2S_HASH_SIZE; i++)
+        LOG_PRINTF("%02x ", remote_fp[i]);
+    LOG_PRINTF("\n");
+    LOG_PRINTF("Key in storage: ");
+    for (int i=0; i<BLAKE2S_HASH_SIZE; i++)
+        LOG_PRINTF("%02x ", st->remote_key_reference[i]);
+    LOG_PRINTF("\n");
+
     //@ ghost key_checked_trace = 1;
     if (!fc_memcmp_uint8(remote_fp, st->remote_key_reference, sizeof(remote_fp))) { /* keys match */
         //@ ghost key_match_trace = 1;
+        LOG_PRINTF("Keys match, accepting peer.\n");
         uint8_t response = REPORT_PAIRING_SUCCESS;
         if (send_encrypted_message(st, &response, sizeof(response)))
             LOG_PRINTF("Error sending pairing response packet\n");
@@ -303,6 +313,7 @@ int handshake_phase2(struct NoiseState * const st, uint8_t *buf, size_t len) {
         return 1;
 
     } else { /* keys don't match */
+        LOG_PRINTF("Keys don't match, requiring pairing.\n");
         uint8_t response = REPORT_PAIRING_START;
         if (send_encrypted_message(st, &response, sizeof(response)))
             LOG_PRINTF("Error sending pairing response packet\n");
@@ -403,6 +414,11 @@ void persist_remote_key(struct NoiseState *st) {
     BLAKE2s_update(&bc, st->remote_key, sizeof(st->remote_key));
     BLAKE2s_finish(&bc, st->remote_key_reference);
     st->handshake_state = HANDSHAKE_DONE_KNOWN_HOST;
+
+    LOG_PRINTF("Key in memory: ");
+    for (int i=0; i<BLAKE2S_HASH_SIZE; i++)
+        LOG_PRINTF("%02x ", st->remote_key_reference[i]);
+    LOG_PRINTF("\n");
 }
 
 /*@