/usr/lib/python2.7/dist-packages/google/oauth2/_client.py is in python-google-auth 1.3.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | # Copyright 2016 Google Inc.
#
# 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.
"""OAuth 2.0 client.
This is a client for interacting with an OAuth 2.0 authorization server's
token endpoint.
For more information about the token endpoint, see
`Section 3.1 of rfc6749`_
.. _Section 3.1 of rfc6749: https://tools.ietf.org/html/rfc6749#section-3.2
"""
import datetime
import json
import six
from six.moves import http_client
from six.moves import urllib
from google.auth import _helpers
from google.auth import exceptions
_URLENCODED_CONTENT_TYPE = 'application/x-www-form-urlencoded'
_JWT_GRANT_TYPE = 'urn:ietf:params:oauth:grant-type:jwt-bearer'
_REFRESH_GRANT_TYPE = 'refresh_token'
def _handle_error_response(response_body):
""""Translates an error response into an exception.
Args:
response_body (str): The decoded response data.
Raises:
google.auth.exceptions.RefreshError
"""
try:
error_data = json.loads(response_body)
error_details = '{}: {}'.format(
error_data['error'],
error_data.get('error_description'))
# If no details could be extracted, use the response data.
except (KeyError, ValueError):
error_details = response_body
raise exceptions.RefreshError(
error_details, response_body)
def _parse_expiry(response_data):
"""Parses the expiry field from a response into a datetime.
Args:
response_data (Mapping): The JSON-parsed response data.
Returns:
Optional[datetime]: The expiration or ``None`` if no expiration was
specified.
"""
expires_in = response_data.get('expires_in', None)
if expires_in is not None:
return _helpers.utcnow() + datetime.timedelta(
seconds=expires_in)
else:
return None
def _token_endpoint_request(request, token_uri, body):
"""Makes a request to the OAuth 2.0 authorization server's token endpoint.
Args:
request (google.auth.transport.Request): A callable used to make
HTTP requests.
token_uri (str): The OAuth 2.0 authorizations server's token endpoint
URI.
body (Mapping[str, str]): The parameters to send in the request body.
Returns:
Mapping[str, str]: The JSON-decoded response data.
Raises:
google.auth.exceptions.RefreshError: If the token endpoint returned
an error.
"""
body = urllib.parse.urlencode(body)
headers = {
'content-type': _URLENCODED_CONTENT_TYPE,
}
response = request(
method='POST', url=token_uri, headers=headers, body=body)
response_body = response.data.decode('utf-8')
if response.status != http_client.OK:
_handle_error_response(response_body)
response_data = json.loads(response_body)
return response_data
def jwt_grant(request, token_uri, assertion):
"""Implements the JWT Profile for OAuth 2.0 Authorization Grants.
For more details, see `rfc7523 section 4`_.
Args:
request (google.auth.transport.Request): A callable used to make
HTTP requests.
token_uri (str): The OAuth 2.0 authorizations server's token endpoint
URI.
assertion (str): The OAuth 2.0 assertion.
Returns:
Tuple[str, Optional[datetime], Mapping[str, str]]: The access token,
expiration, and additional data returned by the token endpoint.
Raises:
google.auth.exceptions.RefreshError: If the token endpoint returned
an error.
.. _rfc7523 section 4: https://tools.ietf.org/html/rfc7523#section-4
"""
body = {
'assertion': assertion,
'grant_type': _JWT_GRANT_TYPE,
}
response_data = _token_endpoint_request(request, token_uri, body)
try:
access_token = response_data['access_token']
except KeyError as caught_exc:
new_exc = exceptions.RefreshError(
'No access token in response.', response_data)
six.raise_from(new_exc, caught_exc)
expiry = _parse_expiry(response_data)
return access_token, expiry, response_data
def refresh_grant(request, token_uri, refresh_token, client_id, client_secret):
"""Implements the OAuth 2.0 refresh token grant.
For more details, see `rfc678 section 6`_.
Args:
request (google.auth.transport.Request): A callable used to make
HTTP requests.
token_uri (str): The OAuth 2.0 authorizations server's token endpoint
URI.
refresh_token (str): The refresh token to use to get a new access
token.
client_id (str): The OAuth 2.0 application's client ID.
client_secret (str): The Oauth 2.0 appliaction's client secret.
Returns:
Tuple[str, Optional[str], Optional[datetime], Mapping[str, str]]: The
access token, new refresh token, expiration, and additional data
returned by the token endpoint.
Raises:
google.auth.exceptions.RefreshError: If the token endpoint returned
an error.
.. _rfc6748 section 6: https://tools.ietf.org/html/rfc6749#section-6
"""
body = {
'grant_type': _REFRESH_GRANT_TYPE,
'client_id': client_id,
'client_secret': client_secret,
'refresh_token': refresh_token,
}
response_data = _token_endpoint_request(request, token_uri, body)
try:
access_token = response_data['access_token']
except KeyError as caught_exc:
new_exc = exceptions.RefreshError(
'No access token in response.', response_data)
six.raise_from(new_exc, caught_exc)
refresh_token = response_data.get('refresh_token', refresh_token)
expiry = _parse_expiry(response_data)
return access_token, refresh_token, expiry, response_data
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