fix(python): make cryptography a required dependency

fixes #4493

python/requirements-optional.txt

@@ -2,4 +2,3 @@ hidapi>=0.7.99.post20
 web3>=5
 Pillow>=10
 stellar-sdk>=6
-cryptography>=41

python/requirements.txt

@@ -8,3 +8,4 @@ libusb1>=1.6.4
 construct>=2.9,!=2.10.55
 typing_extensions>=4.7.1
 construct-classes>=0.1.2
+cryptography>=41

python/setup.py

@@ -31,7 +31,6 @@ extras_require = {
     "qt-widgets": ["PyQt5"],
     "extra": ["Pillow>=10"],
     "stellar": ["stellar-sdk>=6"],
-    "authentication": ["cryptography>=41"],
 }
 
 extras_require["full"] = sum(extras_require.values(), [])

python/src/trezorlib/authentication.py

@@ -4,26 +4,14 @@ import io
 import logging
 import secrets
 import typing as t
-from importlib import metadata
-
-from . import device
-from .client import TrezorClient
-
-try:
-    cryptography_version = metadata.version("cryptography")
-    vsplit = [int(x) for x in cryptography_version.split(".")]
-    if vsplit[0] < 41:
-        raise ImportError(
-            "cryptography>=41 is required for this module, "
-            f"found cryptography=={cryptography_version}"
-        )
-except ImportError as e:
-    raise ImportError("cryptography>=41 is required for this module") from e
 
 from cryptography import exceptions, x509
 from cryptography.hazmat.primitives import hashes, serialization
 from cryptography.hazmat.primitives.asymmetric import ec, utils
 
+from . import device
+from .client import TrezorClient
+
 LOG = logging.getLogger(__name__)
 
 

python/src/trezorlib/cli/device.py

@@ -23,7 +23,7 @@ import typing as t
 import click
 import requests
 
-from .. import debuglink, device, exceptions, messages, ui
+from .. import authentication, debuglink, device, exceptions, messages, ui
 from ..tools import format_path
 from . import ChoiceType, with_client
 
@@ -393,10 +393,6 @@ def authenticate(
     authenticity. By default, it will also check the public keys against a whitelist
     downloaded from Trezor servers. You can skip this check with the --skip-whitelist
     option.
-
-    \b
-    When not using --raw, 'cryptography' library is required. You can install it via:
-      pip3 install trezor[authentication]
     """
     if hex_challenge is None:
         hex_challenge = secrets.token_hex(32)
@@ -413,15 +409,6 @@ def authenticate(
             click.echo(f"CA certificate: {cert.hex()}")
         return
 
-    try:
-        from .. import authentication
-    except ImportError as e:
-        click.echo("Failed to import the authentication module.")
-        click.echo(f"Error: {e}")
-        click.echo("Make sure you have the required dependencies:")
-        click.echo("  pip3 install trezor[authentication]")
-        sys.exit(4)
-
     if root is not None:
         root_bytes = root.read()
     else: