Source code for adb.sign_cryptography

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#
# Licensed under the Apache License, Version 2.0 (the "License");
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#     http://www.apache.org/licenses/LICENSE-2.0
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"""ADB authentication using the ``cryptography`` package.


.. rubric:: Contents

* :class:`CryptographySigner`

    * :meth:`CryptographySigner.GetPublicKey`
    * :meth:`CryptographySigner.Sign`

"""

from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import padding
from cryptography.hazmat.primitives.asymmetric import utils

from adb import adb_protocol


# pylint: disable=abstract-method
[docs]class CryptographySigner(adb_protocol.AuthSigner): """AuthSigner using cryptography.io. .. warning:: This is currently broken! .. image:: _static/adb.sign_cryptography.CryptographySigner.CALL_GRAPH.svg Parameters ---------- rsa_key_path : str The path to the private key. Attributes ---------- public_key : str The contents of the public key file rsa_key : cryptography.hazmat.backends.openssl.rsa._RSAPrivateKey The loaded private key """ def __init__(self, rsa_key_path): with open(rsa_key_path + '.pub') as rsa_pub_file: self.public_key = rsa_pub_file.read() with open(rsa_key_path) as rsa_prv_file: self.rsa_key = serialization.load_pem_private_key(rsa_prv_file.read(), None, default_backend())
[docs] def Sign(self, data): """Signs given data using a private key. Parameters ---------- data : TODO TODO Returns ------- TODO The signed ``data`` """ return self.rsa_key.sign(data, padding.PKCS1v15(), utils.Prehashed(hashes.SHA1()))
[docs] def GetPublicKey(self): """Returns the public key in PEM format without headers or newlines. Returns ------- self.public_key : str The contents of the public key file """ return self.public_key