refactor(core): Allow eth & btc signing at m/45'/coin_type/account/change/address_index

[no changelog]

common/tests/fixtures/ethereum/signmessage.json

@@ -14,6 +14,16 @@
                 "sig": "af4eac50f21acc6daeb0ab036f616f5d19fccade46e47100642b3dfc798c9b740d5873887bdc2f02502c90777a082d10dca113bd1ec29d08108396401421c8cc1b"
             }
         },
+        {
+            "parameters": {
+                "msg": "This is an example of a signed message at a different path.",
+                "path": "m/45'/60/2/1/1"
+            },
+            "result": {
+                "address": "0x4C28fB5643a2F9B03736103188845C5B50300242",
+                "sig": "0x10cb53ab88112fa0a915ab3e477843ab534ba1a1caeb70747373a86cba69ca6c5f70367d8f9023e1d7cd9fe34279dd9266dd26d7390acbfdea777c4c436de4df1c"
+            }
+        },
         {
             "parameters": {
                 "msg": "VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!VeryLongMessage!",

core/src/apps/bitcoin/keychain.py

@@ -3,7 +3,7 @@ from typing import TYPE_CHECKING
 
 from trezor.messages import AuthorizeCoinJoin, SignMessage
 
-from apps.common.paths import PATTERN_BIP44, PathSchema
+from apps.common.paths import PATTERN_BIP44, PATTERN_CASA, PathSchema
 
 from . import authorization
 from .common import BITCOIN_NAMES
@@ -74,7 +74,7 @@ PATTERN_GREENADDRESS_B = "m/3'/[1-100]'/[1,4]/address_index"
 PATTERN_GREENADDRESS_SIGN_A = "m/1195487518"
 PATTERN_GREENADDRESS_SIGN_B = "m/1195487518/6/address_index"
 
-PATTERN_CASA = "m/49/coin_type/account/change/address_index"
+PATTERN_CASA_UNHARDENED = "m/49/coin_type/account/change/address_index"
 
 PATTERN_UNCHAINED_HARDENED = (
     "m/45'/coin_type'/account'/[0-1000000]/change/address_index"
@@ -141,13 +141,14 @@ def validate_path_against_script_type(
 
     elif coin.segwit and script_type == InputScriptType.SPENDP2SHWITNESS:
         append(PATTERN_BIP49)
+        append(PATTERN_CASA)
         if multisig:
             append(PATTERN_BIP48_P2SHSEGWIT)
         if slip44 == _SLIP44_BITCOIN:
             append(PATTERN_GREENADDRESS_A)
             append(PATTERN_GREENADDRESS_B)
         if coin.coin_name in BITCOIN_NAMES:
-            append(PATTERN_CASA)
+            append(PATTERN_CASA_UNHARDENED)
 
     elif coin.segwit and script_type == InputScriptType.SPENDWITNESS:
         append(PATTERN_BIP84)
@@ -178,6 +179,7 @@ def _get_schemas_for_coin(
     patterns = [
         PATTERN_BIP44,
         PATTERN_BIP48_RAW,
+        PATTERN_CASA,
     ]
 
     # patterns without coin_type field must be treated as if coin_type == 0
@@ -201,7 +203,7 @@ def _get_schemas_for_coin(
     if coin.coin_name in BITCOIN_NAMES:
         patterns.extend(
             (
-                PATTERN_CASA,
+                PATTERN_CASA_UNHARDENED,
                 PATTERN_UNCHAINED_HARDENED,
                 PATTERN_UNCHAINED_UNHARDENED,
                 PATTERN_UNCHAINED_DEPRECATED,

core/src/apps/common/paths.py

@@ -338,6 +338,8 @@ PATTERN_SEP5 = "m/44'/coin_type'/account'"
 # https://github.com/trezor/trezor-firmware/issues/1749
 PATTERN_SEP5_LEDGER_LIVE_LEGACY = "m/44'/coin_type'/0'/account"
 
+PATTERN_CASA = "m/45'/coin_type/account/change/address_index"
+
 
 async def validate_path(
     ctx: wire.Context,

core/src/apps/ethereum/keychain.py

@@ -44,16 +44,19 @@ PATTERNS_ADDRESS = (
     paths.PATTERN_BIP44,
     paths.PATTERN_SEP5,
     paths.PATTERN_SEP5_LEDGER_LIVE_LEGACY,
+    paths.PATTERN_CASA,
 )
 
 
 def _schemas_from_address_n(
     patterns: Iterable[str], address_n: paths.Bip32Path
 ) -> Iterable[paths.PathSchema]:
-    if len(address_n) < 2:
-        return ()
-
+    # Casa paths (purpose of 45) do not have hardened coin types
+    if address_n[0] == 45 | paths.HARDENED and not address_n[1] & paths.HARDENED:
+        slip44_hardened = address_n[1] | paths.HARDENED
+    else:
         slip44_hardened = address_n[1]
+
     if slip44_hardened not in networks.all_slip44_ids_hardened():
         return ()
 

tests/device_tests/bitcoin/test_nonstandard_paths.py

@@ -85,6 +85,8 @@ VECTORS_MULTISIG = (  # paths, address_index
     (("m/45h/0/63/1000000", "m/45h/0/62/1000000", "m/45h/0/61/1000000"), [0, 255]),
     # Unchained deprecated m/45'/coin_type'/account'/[0-1000000]/address_index
     (("m/45h/0h/63h/1000000", "m/45h/0h/62h/1000000", "m/45h/0/61/1000000"), [255]),
+    # Casa Paths
+    (("m/45h/0/60/1", "m/45h/1/60/0", "m/45h/2/60/0"), [255]),
 )