72 lines
3.1 KiB
Ruby
72 lines
3.1 KiB
Ruby
|
# Copyright 2015, Google Inc.
|
||
|
|
# All rights reserved.
|
||
|
|
#
|
||
|
|
# Redistribution and use in source and binary forms, with or without
|
||
|
|
# modification, are permitted provided that the following conditions are
|
||
|
|
# met:
|
||
|
|
#
|
||
|
|
# * Redistributions of source code must retain the above copyright
|
||
|
|
# notice, this list of conditions and the following disclaimer.
|
||
|
|
# * Redistributions in binary form must reproduce the above
|
||
|
|
# copyright notice, this list of conditions and the following disclaimer
|
||
|
|
# in the documentation and/or other materials provided with the
|
||
|
|
# distribution.
|
||
|
|
# * Neither the name of Google Inc. nor the names of its
|
||
|
|
# contributors may be used to endorse or promote products derived from
|
||
|
|
# this software without specific prior written permission.
|
||
|
|
#
|
||
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
require 'googleauth/signet'
|
||
|
|
require 'multi_json'
|
||
|
|
require 'openssl'
|
||
|
|
|
||
|
|
# Reads the private key and client email fields from service account JSON key.
|
||
|
|
def read_json_key(json_key_io)
|
||
|
|
json_key = MultiJson.load(json_key_io.read)
|
||
|
|
fail 'missing client_email' unless json_key.key?('client_email')
|
||
|
|
fail 'missing private_key' unless json_key.key?('private_key')
|
||
|
|
[json_key['private_key'], json_key['client_email']]
|
||
|
|
end
|
||
|
|
|
||
|
|
module Google
|
||
|
|
# Module Auth provides classes that provide Google-specific authorization
|
||
|
|
# used to access Google APIs.
|
||
|
|
module Auth
|
||
|
|
# Authenticates requests using Google's Service Account credentials.
|
||
|
|
#
|
||
|
|
# This class provides a simpler surface to the behavior in
|
||
|
|
# Signet::OAuth2::Client. It allows authorizing requests directly using
|
||
|
|
# credentials from a json key file downloaded from the developer console
|
||
|
|
# (via 'Generate new Json Key').
|
||
|
|
#
|
||
|
|
# cf [Application Default Credentials](http://goo.gl/mkAHpZ)
|
||
|
|
class ServiceAccountCredentials < Signet::OAuth2::Client
|
||
|
|
TOKEN_CRED_URI = 'https://www.googleapis.com/oauth2/v3/token'
|
||
|
|
|
||
|
|
# Initializes a ServiceAccountCredentials.
|
||
|
|
#
|
||
|
|
# @param scope [string|array] the scope(s) to access
|
||
|
|
# @param json_key_io [IO] an IO from which the JSON key can be read
|
||
|
|
def initialize(scope, json_key_io)
|
||
|
|
private_key, client_email = read_json_key(json_key_io)
|
||
|
|
super(token_credential_uri: TOKEN_CRED_URI,
|
||
|
|
audience: TOKEN_CRED_URI, # TODO: confirm this
|
||
|
|
scope: scope,
|
||
|
|
issuer: client_email,
|
||
|
|
signing_key: OpenSSL::PKey::RSA.new(private_key))
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|