feat(python): introduce interaction-less upgrade

python/.changelog.d/2919.added.1

@@ -0,0 +1 @@
+Support interaction-less upgrade

python/.changelog.d/2919.added.2

@@ -0,0 +1 @@
+trezorctl: Automatically go to bootloader when upgrading firmware

python/src/trezorlib/cli/firmware.py

@@ -16,6 +16,7 @@
 
 import os
 import sys
+import time
 from typing import (
     TYPE_CHECKING,
     Any,
@@ -32,7 +33,7 @@ from urllib.parse import urlparse
 import click
 import requests
 
-from .. import exceptions, firmware, messages, models
+from .. import device, exceptions, firmware, messages, models
 from ..firmware import models as fw_models
 from ..models import TrezorModel
 from . import ChoiceType, with_client
@@ -460,6 +461,43 @@ def upload_firmware_into_device(
         sys.exit(3)
 
 
+def _is_strict_update(client: "TrezorClient", firmware_data: bytes) -> bool:
+    """Check if the firmware is from the same vendor and the
+    firmware is newer than the currently installed firmware.
+    """
+    try:
+        fw = firmware.parse(firmware_data)
+    except Exception as e:
+        click.echo(e)
+        sys.exit(2)
+
+    if not isinstance(fw, firmware.VendorFirmware):
+        return False
+
+    f = client.features
+    cur_version = (f.major_version, f.minor_version, f.patch_version, 0)
+
+    return (
+        fw.vendor_header.text == f.fw_vendor
+        and fw.firmware.header.version > cur_version
+        and fw.vendor_header.trust.is_full_trust()
+    )
+
+
+def _get_firmware_header_size(firmware_data: bytes) -> int:
+    """Returns size of vendor and image headers"""
+    try:
+        fw = firmware.parse(firmware_data)
+    except Exception as e:
+        click.echo(e)
+        sys.exit(2)
+
+    if isinstance(fw, firmware.VendorFirmware):
+        return fw.firmware.header.header_len + fw.vendor_header.header_len
+
+    return 0
+
+
 @click.group(name="firmware")
 def cli() -> None:
     """Firmware commands."""
@@ -581,9 +619,9 @@ def download(
 @click.option("--raw", is_flag=True, help="Push raw firmware data to Trezor")
 @click.option("--fingerprint", help="Expected firmware fingerprint in hex")
 # fmt: on
-@with_client
+@click.pass_obj
 def update(
-    client: "TrezorClient",
+    obj: "TrezorConnection",
     filename: Optional[BinaryIO],
     url: Optional[str],
     version: Optional[str],
@@ -596,8 +634,6 @@ def update(
 ) -> None:
     """Upload new firmware to device.
 
-    Device must be in bootloader mode.
-
     You can specify a filename or URL from which the firmware can be downloaded.
     You can also explicitly specify a firmware version that you want.
     Otherwise, trezorctl will attempt to find latest available version
@@ -607,14 +643,11 @@ def update(
     against downloaded firmware fingerprint. Otherwise fingerprint is checked
     against data.trezor.io information, if available.
     """
+    with obj.client_context() as client:
         if sum(bool(x) for x in (filename, url, version)) > 1:
             click.echo("You can use only one of: filename, url, version.")
             sys.exit(1)
 
-    if not dry_run and not client.features.bootloader_mode:
-        click.echo("Please switch your device to bootloader mode.")
-        sys.exit(1)
-
         if filename:
             firmware_data = filename.read()
         else:
@@ -643,7 +676,33 @@ def update(
 
         if dry_run:
             click.echo("Dry run. Not uploading firmware to device.")
+            return
+
+        if not client.features.bootloader_mode:
+            if _is_strict_update(client, firmware_data):
+                header_size = _get_firmware_header_size(firmware_data)
+                device.reboot_to_bootloader(
+                    client,
+                    boot_command=messages.BootCommand.INSTALL_UPGRADE,
+                    firmware_header=firmware_data[:header_size],
+                )
             else:
+                device.reboot_to_bootloader(client)
+
+            click.echo("Waiting for bootloader...")
+            while True:
+                time.sleep(0.5)
+                try:
+                    obj.get_transport()
+                    break
+                except Exception:
+                    pass
+
+    with obj.client_context() as client:
+        if not client.features.bootloader_mode:
+            click.echo("Please switch your device to bootloader mode.")
+            sys.exit(1)
+
         upload_firmware_into_device(client=client, firmware_data=firmware_data)
 
 

python/src/trezorlib/firmware/vendor.py

@@ -70,6 +70,14 @@ class VendorTrust(Struct):
         2,
     )
 
+    def is_full_trust(self) -> bool:
+        return (
+            not self.show_vendor_string
+            and not self.require_user_click
+            and not self.red_background
+            and self.delay == 0
+        )
+
 
 class VendorHeader(Struct):
     header_len: int

python/src/trezorlib/messages.py

@@ -485,6 +485,11 @@ class WordRequestType(IntEnum):
     Matrix6 = 2
 
 
+class BootCommand(IntEnum):
+    STOP_AND_WAIT = 0
+    INSTALL_UPGRADE = 1
+
+
 class DebugSwipeDirection(IntEnum):
     UP = 0
     DOWN = 1
@@ -3746,6 +3751,19 @@ class CancelAuthorization(protobuf.MessageType):
 
 class RebootToBootloader(protobuf.MessageType):
     MESSAGE_WIRE_TYPE = 87
+    FIELDS = {
+        1: protobuf.Field("boot_command", "BootCommand", repeated=False, required=False, default=BootCommand.STOP_AND_WAIT),
+        2: protobuf.Field("firmware_header", "bytes", repeated=False, required=False, default=None),
+    }
+
+    def __init__(
+        self,
+        *,
+        boot_command: Optional["BootCommand"] = BootCommand.STOP_AND_WAIT,
+        firmware_header: Optional["bytes"] = None,
+    ) -> None:
+        self.boot_command = boot_command
+        self.firmware_header = firmware_header
 
 
 class GetNonce(protobuf.MessageType):