Merge #533: Oct 2021 Fix CI

e168d8f tests: Use a different magic value for "blank" fingerprint (Andrew Chow)
0148966 tests, build: Make sure rust is up to date (Andrew Chow)

Pull request description:

  Fixing CI, again.

  * Coldcard needs a different special fingerprint for "not ours" because the fingerprint `00000000` is now being treated as "ours"
  * Fixed some rust problems for building Trezor T

Top commit has no ACKs.

Tree-SHA512: 43e943c637255256ef878de4fe9cd3cfdafe91c7a6eae4d7575ef1590a5f1443d37eb91aff63c024ba241d401059acd4ceaa0b593e6f51498e4f645755e9568c

test/setup_environment.sh

@@ -89,6 +89,8 @@ if [[ -n ${build_trezor_1} || -n ${build_trezor_t} ]]; then
     fi
 
     if [[ -n ${build_trezor_t} ]]; then
+        rustup toolchain uninstall stable
+        rustup toolchain install stable
         rustup update
         # Build trezor t emulator. This is pretty fast, so rebuilding every time is ok
         # But there should be some caching that makes this faster

test/test_device.py

@@ -300,9 +300,9 @@ def _generate_and_finalize(self, unknown_inputs, psbt):
             # Single input PSBTs will be fully signed by first signer
             for psbt_input in first_psbt.inputs[1:]:
                 for pubkey, path in psbt_input.hd_keypaths.items():
-                    psbt_input.hd_keypaths[pubkey] = KeyOriginInfo(b"\x00\x00\x00\x00", path.path)
+                    psbt_input.hd_keypaths[pubkey] = KeyOriginInfo(b"\x00\x00\x00\x01", path.path)
             for pubkey, path in second_psbt.inputs[0].hd_keypaths.items():
-                second_psbt.inputs[0].hd_keypaths[pubkey] = KeyOriginInfo(b"\x00\x00\x00\x00", path.path)
+                second_psbt.inputs[0].hd_keypaths[pubkey] = KeyOriginInfo(b"\x00\x00\x00\x01", path.path)
 
             single_input = len(first_psbt.inputs) == 1