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Adding beginnings of a system tests URL.
It seems `google-auth` is a little under-powered on
the dev-appserver:
```
>>> import google.auth
>>> credentials, project = google.auth.default()
>>> credentials
<google.auth.app_engine.Credentials object at 0x7fc9b51105d0>
>>> project
'None'
```
As compared with (also in the dev appserver):
```
>>> from google.appengine.api import app_identity
>>> app_identity.get_application_id()
'None'
>>> app_identity.get_service_account_name()
'...@developer.gserviceaccount.com'
>>> key_name, signature = app_identity.sign_blob(b'abc')
>>> key_name
'5167...'
>>> signature
'6)\x0c\xe0\xad\x1a\x05\xfa\xfd\xcd\xd9_3L{\xad...'
```
References:
- https://cloud.google.com/appengine/docs/standard/python/refdocs/google.appengine.api.app_identity.app_identity
- googleapis/google-cloud-python#574- Loading branch information
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,255 @@ | ||
| # Copyright 2017 Google Inc. All rights reserved. | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
|
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| """Helper to convert a JSON key file into a PEM PKCS#1 key.""" | ||
|
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| from __future__ import print_function | ||
|
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| import argparse | ||
| import os | ||
| import json | ||
| import subprocess | ||
| import sys | ||
|
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| try: | ||
| import py | ||
| except ImportError: | ||
| py = None | ||
|
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|
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| ENV_VAR = 'GOOGLE_APPLICATION_CREDENTIALS' | ||
|
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|
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| def _require_env(): | ||
| json_filename = os.environ.get(ENV_VAR) | ||
| if json_filename is None: | ||
| msg = '{} is unset'.format(ENV_VAR) | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
|
|
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| return json_filename | ||
|
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|
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| def _require_file(json_filename): | ||
| if not os.path.isfile(json_filename): | ||
| msg = '{}={} is not a file.'.format(ENV_VAR, json_filename) | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
|
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|
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| def _require_json(json_filename): | ||
| with open(json_filename, 'r') as file_obj: | ||
| try: | ||
| return json.load(file_obj) | ||
| except: | ||
| msg = '{}={} does not contain valid JSON.'.format( | ||
| ENV_VAR, json_filename) | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
|
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|
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| def _require_private_key(key_json): | ||
| pkcs8_pem = key_json.get('private_key') | ||
| if pkcs8_pem is None: | ||
| msg = '``private_key`` missing in JSON key file' | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
|
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| return pkcs8_pem | ||
|
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|
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| def _require_email(key_json): | ||
| client_email = key_json.get('client_email') | ||
| if client_email is None: | ||
| msg = '``client_email`` missing in JSON key file' | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
|
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| return client_email | ||
|
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|
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| def get_key_json(): | ||
| json_filename = _require_env() | ||
| _require_file(json_filename) | ||
| key_json = _require_json(json_filename) | ||
| return key_json, json_filename | ||
|
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||
|
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| def _require_py(): | ||
| if py is None: | ||
| msg = 'py (https://pypi.org/project/py/) must be installed.' | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
|
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|
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| def _require_openssl(): | ||
| """Check that ``openssl`` is on the PATH. | ||
| Assumes :func:`_require_py` has been checked. | ||
| """ | ||
| if py.path.local.sysfind('openssl') is None: | ||
| msg = '``openssl`` command line tool must be installed.' | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
|
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|
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| def _pkcs8_filename(pkcs8_pem, base): | ||
| """Create / check a PKCS#8 file. | ||
| Exits with 1 if the file already exists and differs from | ||
| ``pkcs8_pem``. If the file does not exists, creates it with | ||
| ``pkcs8_pem`` as contents and sets permissions to 0400. | ||
| Args: | ||
| pkcs8_pem (str): The contents to be stored (or checked). | ||
| base (str): The base file path (without extension). | ||
| Returns: | ||
| str: The filename that was checked / created. | ||
| """ | ||
| pkcs8_filename = '{}-PKCS8.pem'.format(base) | ||
| if os.path.exists(pkcs8_filename): | ||
| with open(pkcs8_filename, 'r') as file_obj: | ||
| contents = file_obj.read() | ||
|
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| if contents != pkcs8_pem: | ||
| msg = 'PKCS#8 file {} already exists.'.format(pkcs8_filename) | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
| else: | ||
| with open(pkcs8_filename, 'w') as file_obj: | ||
| file_obj.write(pkcs8_pem) | ||
| # Protect the file from being read by other users.. | ||
| os.chmod(pkcs8_filename, 0o400) | ||
|
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| return pkcs8_filename | ||
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| def _pkcs1_verify(pkcs8_filename, pkcs1_filename): | ||
| """Verify the contents of an existing PKCS#1 file. | ||
| Does so by using ``openssl rsa`` to print to stdout and | ||
| then checking against contents. | ||
| Exits with 1 if: | ||
| * The ``openssl`` command fails | ||
| * The ``pkcs1_filename`` contents differ from what was produced | ||
| by ``openssl`` | ||
| Args: | ||
| pkcs8_filename (str): The PKCS#8 file to be converted. | ||
| pkcs1_filename (str): The PKCS#1 file to check against. | ||
| """ | ||
| cmd = ( | ||
| 'openssl', | ||
| 'rsa', | ||
| '-in', | ||
| pkcs8_filename, | ||
| ) | ||
| process = subprocess.Popen( | ||
| cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE) | ||
| return_code = process.wait() | ||
|
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| if return_code != 0: | ||
| msg = 'Failed checking contents of {} against openssl.'.format( | ||
| pkcs1_filename) | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
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| cmd_output = process.stdout.read().decode('utf-8') | ||
| with open(pkcs1_filename, 'r') as file_obj: | ||
| expected_contents = file_obj.read() | ||
|
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| if cmd_output != expected_contents: | ||
| msg = 'PKCS#1 file {} already exists.'.format(pkcs1_filename) | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
|
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| def _pkcs1_create(pkcs8_filename, pkcs1_filename): | ||
| """Create a existing PKCS#1 file from a PKCS#8 file. | ||
| Does so by using ``openssl rsa -in * -out *``. | ||
| Exits with 1 if the ``openssl`` command fails. | ||
| Args: | ||
| pkcs8_filename (str): The PKCS#8 file to be converted. | ||
| pkcs1_filename (str): The PKCS#1 file to be created. | ||
| """ | ||
| cmd = ( | ||
| 'openssl', | ||
| 'rsa', | ||
| '-in', | ||
| pkcs8_filename, | ||
| '-out', | ||
| pkcs1_filename, | ||
| ) | ||
| process = subprocess.Popen( | ||
| cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE) | ||
| return_code = process.wait() | ||
| if return_code != 0: | ||
| msg = 'Failed to convert {} to {} with openssl.'.format( | ||
| pkcs8_filename, pkcs1_filename) | ||
| print(msg, file=sys.stderr) | ||
| sys.exit(1) | ||
|
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| def convert_key(pkcs8_pem, json_filename): | ||
| _require_py() | ||
| _require_openssl() | ||
|
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| base, _ = os.path.splitext(json_filename) | ||
| pkcs8_filename = _pkcs8_filename(pkcs8_pem, base) | ||
|
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| pkcs1_filename = '{}-PKCS1.pem'.format(base) | ||
| if os.path.exists(pkcs1_filename): | ||
| _pkcs1_verify(pkcs8_filename, pkcs1_filename) | ||
| else: | ||
| _pkcs1_create(pkcs8_filename, pkcs1_filename) | ||
|
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| return pkcs1_filename | ||
|
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| def get_args(): | ||
| parser = argparse.ArgumentParser( | ||
| description='Convert a JSON keyfile to dev_appserver values.') | ||
|
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| group = parser.add_mutually_exclusive_group(required=True) | ||
| group.add_argument( | ||
| '--email', action='store_true', | ||
| help='Requests that the email address be returned.') | ||
| pkcs1_help = ( | ||
| 'Requests that a filename for the converted PKCS#1 file be returned.') | ||
| group.add_argument( | ||
| '--pkcs1', action='store_true', help=pkcs1_help) | ||
|
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| return parser.parse_args() | ||
|
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| def main(): | ||
| args = get_args() | ||
|
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| key_json, json_filename = get_key_json() | ||
| if args.email: | ||
| print(_require_email(key_json)) | ||
| else: | ||
| pkcs8_pem = _require_private_key(key_json) | ||
| pkcs1_filename = convert_key(pkcs8_pem, json_filename) | ||
| print(pkcs1_filename) | ||
|
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|
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| if __name__ == '__main__': | ||
| main() |
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