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| 1 | +# !/usr/bin/env python |
| 2 | +# |
| 3 | +# Copyright 2018 Google LLC |
| 4 | +# |
| 5 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | +# you may not use this file except in compliance with the License. |
| 7 | +# You may obtain a copy of the License at |
| 8 | +# |
| 9 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | +# |
| 11 | +# Unless required by applicable law or agreed to in writing, software |
| 12 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | +# See the License for the specific language governing permissions and |
| 15 | +# limitations under the License. |
| 16 | + |
| 17 | +"""Demonstrates how to perform basic access management with Google Cloud IAM. |
| 18 | +
|
| 19 | +For more information, see the documentation at |
| 20 | +https://cloud.google.com/iam/docs/granting-changing-revoking-access. |
| 21 | +""" |
| 22 | + |
| 23 | +import argparse |
| 24 | +import os |
| 25 | + |
| 26 | +from google.oauth2 import service_account |
| 27 | +import googleapiclient.discovery |
| 28 | + |
| 29 | + |
| 30 | +credentials = service_account.Credentials.from_service_account_file( |
| 31 | + filename=os.environ['GOOGLE_APPLICATION_CREDENTIALS'], |
| 32 | + scopes=['https://www.googleapis.com/auth/cloud-platform']) |
| 33 | +service = googleapiclient.discovery.build( |
| 34 | + 'cloudresourcemanager', 'v1', credentials=credentials) |
| 35 | + |
| 36 | + |
| 37 | +# [START iam_get_policy] |
| 38 | +def get_policy(project_id): |
| 39 | + """Gets IAM policy for a project.""" |
| 40 | + |
| 41 | + # pylint: disable=no-member |
| 42 | + policy = service.projects().getIamPolicy( |
| 43 | + resource=project_id, body={}).execute() |
| 44 | + print(policy) |
| 45 | + return policy |
| 46 | +# [END iam_get_policy] |
| 47 | + |
| 48 | + |
| 49 | +# [START iam_modify_policy_add_member] |
| 50 | +def modify_policy_add_member(policy, role, member): |
| 51 | + """Adds a new member to a role binding.""" |
| 52 | + binding = next(b for b in policy['bindings'] if b['role'] == role) |
| 53 | + binding['members'].append(member) |
| 54 | + print(binding) |
| 55 | + return policy |
| 56 | +# [END iam_modify_policy_add_member] |
| 57 | + |
| 58 | + |
| 59 | +# [START iam_modify_policy_add_role] |
| 60 | +def modify_policy_add_role(policy, role, member): |
| 61 | + """Adds a new role binding to a policy.""" |
| 62 | + binding = { |
| 63 | + 'role': role, |
| 64 | + 'members': [member] |
| 65 | + } |
| 66 | + policy['bindings'].append(binding) |
| 67 | + print(policy) |
| 68 | + return policy |
| 69 | +# [END iam_modify_policy_add_role] |
| 70 | + |
| 71 | + |
| 72 | +# [START iam_set_policy] |
| 73 | +def set_policy(project_id, policy): |
| 74 | + """Sets IAM policy for a project.""" |
| 75 | + |
| 76 | + # pylint: disable=no-member |
| 77 | + policy = service.projects().setIamPolicy( |
| 78 | + resource=project_id, body={ |
| 79 | + 'policy': policy |
| 80 | + }).execute() |
| 81 | + print(policy) |
| 82 | + return policy |
| 83 | +# [END iam_set_policy] |
| 84 | + |
| 85 | + |
| 86 | +def main(): |
| 87 | + parser = argparse.ArgumentParser( |
| 88 | + description=__doc__, |
| 89 | + formatter_class=argparse.RawDescriptionHelpFormatter) |
| 90 | + |
| 91 | + subparsers = parser.add_subparsers(dest='command') |
| 92 | + |
| 93 | + # Get |
| 94 | + get_parser = subparsers.add_parser( |
| 95 | + 'get', help=get_policy.__doc__) |
| 96 | + get_parser.add_argument('project_id') |
| 97 | + |
| 98 | + # Modify: add member |
| 99 | + modify_member_parser = subparsers.add_parser( |
| 100 | + 'modify_member', help=get_policy.__doc__) |
| 101 | + modify_member_parser.add_argument('project_id') |
| 102 | + modify_member_parser.add_argument('role') |
| 103 | + modify_member_parser.add_argument('member') |
| 104 | + |
| 105 | + # Modify: add role |
| 106 | + modify_role_parser = subparsers.add_parser( |
| 107 | + 'modify_role', help=get_policy.__doc__) |
| 108 | + modify_role_parser.add_argument('project_id') |
| 109 | + modify_role_parser.add_argument('project_id') |
| 110 | + modify_role_parser.add_argument('role') |
| 111 | + modify_role_parser.add_argument('member') |
| 112 | + |
| 113 | + # Set |
| 114 | + set_parser = subparsers.add_parser( |
| 115 | + 'set', help=set_policy.__doc__) |
| 116 | + set_parser.add_argument('project_id') |
| 117 | + set_parser.add_argument('policy') |
| 118 | + |
| 119 | + args = parser.parse_args() |
| 120 | + |
| 121 | + if args.command == 'get': |
| 122 | + get_policy(args.project_id) |
| 123 | + elif args.command == 'set': |
| 124 | + set_policy(args.project_id, args.policy) |
| 125 | + elif args.command == 'add_member': |
| 126 | + modify_policy_add_member(args.policy, args.role, args.member) |
| 127 | + elif args.command == 'add_binding': |
| 128 | + modify_policy_add_role(args.policy, args.role, args.member) |
| 129 | + |
| 130 | + |
| 131 | +if __name__ == '__main__': |
| 132 | + main() |
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