wip fix cardano part 2

python/src/trezorlib/transport/session.py

@@ -3,6 +3,11 @@ from __future__ import annotations
 import logging
 import typing as t
 
+from mnemonic import Mnemonic
+from trezorlib.client import MAX_PASSPHRASE_LENGTH, PASSPHRASE_ON_DEVICE
+
+from trezor.enums import Capability
+
 from .. import exceptions, messages, models
 from .thp.protocol_v1 import ProtocolV1
 from .thp.protocol_v2 import ProtocolV2
@@ -16,6 +21,7 @@ LOG = logging.getLogger(__name__)
 class Session:
     button_callback: t.Callable[[Session, t.Any], t.Any] | None = None
     pin_callback: t.Callable[[Session, t.Any], t.Any] | None = None
+    passphrase_callback: t.Callable[[Session, t.Any], t.Any] | None = None
 
     def __init__(self, client: TrezorClient, id: bytes) -> None:
         self.client = client
@@ -37,8 +43,9 @@ class Session:
                     raise Exception  # TODO
                 resp = self.pin_callback(self, resp)
             elif isinstance(resp, messages.PassphraseRequest):
-                raise NotImplementedError
-                # resp = self._callback_passphrase(resp)
+                if self.passphrase_callback is None:
+                    raise Exception  # TODO
+                resp = self.passphrase_callback(self, resp)
             elif isinstance(resp, messages.ButtonRequest):
                 if self.button_callback is None:
                     raise Exception  # TODO
@@ -97,6 +104,7 @@ class SessionV1(Session):
             session = SessionV1(client, session_id)
         session.button_callback = client.button_callback
         session.pin_callback = client.pin_callback
+        session.passphrase_callback = _callback_passphrase
         session._init_session(derive_cardano=derive_cardano)
         return session
 
@@ -111,17 +119,58 @@ class SessionV1(Session):
         return self.client.protocol.read()
 
     def _init_session(self, derive_cardano: bool = False):
-        self._write(
+        self.call_raw(
             messages.Initialize(session_id=self.id, derive_cardano=derive_cardano)
         )
-        _ = self._read()
-
 
 def _callback_button(session: Session, msg: t.Any) -> t.Any:
     print("Please confirm action on your Trezor device.")  # TODO how to handle UI?
     return session.call(messages.ButtonAck())
 
 
+def _callback_passphrase(session: Session, msg: messages.PassphraseRequest) -> t.Any:
+    available_on_device = Capability.PassphraseEntry in Session.features.capabilities
+
+    def send_passphrase(
+        passphrase: str | None = None, on_device: bool | None = None
+    ) -> t.Any:
+        msg = messages.PassphraseAck(passphrase=passphrase, on_device=on_device)
+        resp = session.call_raw(msg)
+        if isinstance(resp, messages.Deprecated_PassphraseStateRequest):
+            session.session_id = resp.state
+            resp = session.call_raw(messages.Deprecated_PassphraseStateAck())
+        return resp
+
+    # short-circuit old style entry
+    if msg._on_device is True:
+        return send_passphrase(None, None)
+
+    try:
+        passphrase = session.client.ui.get_passphrase(
+            available_on_device=available_on_device
+        )  # TODO
+    except exceptions.Cancelled:
+        session.call_raw(messages.Cancel())
+        raise
+
+    if passphrase is PASSPHRASE_ON_DEVICE:
+        if not available_on_device:
+            session.call_raw(messages.Cancel())
+            raise RuntimeError("Device is not capable of entering passphrase")
+        else:
+            return send_passphrase(on_device=True)
+
+    # else process host-entered passphrase
+    if not isinstance(passphrase, str):
+        raise RuntimeError("Passphrase must be a str")
+    passphrase = Mnemonic.normalize_string(passphrase)
+    if len(passphrase) > MAX_PASSPHRASE_LENGTH:
+        session.call_raw(messages.Cancel())
+        raise ValueError("Passphrase too long")
+
+    return send_passphrase(passphrase, on_device=False)
+
+
 class SessionV2(Session):
 
     @classmethod