| import json | |
| class IAM(object): | |
| def __init__(self, iam_client): | |
| self.iam_client = iam_client | |
| def check_if_role_exists(self, role_name): | |
| """Method to verify if a particular role exists""" | |
| try: | |
| self.iam_client.get_role(RoleName=role_name) | |
| except self.iam_client.exceptions.NoSuchEntityException: | |
| return False | |
| return True | |
| def check_if_policy_exists(self, policy_arn): | |
| """Method to verify if a particular policy exists""" | |
| try: | |
| self.iam_client.get_policy(PolicyArn=policy_arn) | |
| except self.iam_client.exceptions.NoSuchEntityException: | |
| return False | |
| return True | |
| def attach_policy_to_role(self, policy_arn, role_name): | |
| """Method to attach LifecyclePolicy to role specified by role_name""" | |
| return self.iam_client.attach_role_policy( | |
| PolicyArn=policy_arn, | |
| RoleName=role_name | |
| ) | |
| def create_role_with_trust_policy(self, role_name, assume_role_policy): | |
| """Method to create role with a given role name | |
| and assume_role_policy | |
| """ | |
| return self.iam_client.create_role( | |
| RoleName=role_name, | |
| AssumeRolePolicyDocument=json.dumps(assume_role_policy)) | |
| def get_policy(self, arn): | |
| """Method to get the Policy for a particular ARN | |
| This is used to display the policy contents to the user | |
| """ | |
| pol_det = self.iam_client.get_policy(PolicyArn=arn) | |
| policy_version_details = self.iam_client.get_policy_version( | |
| PolicyArn=arn, | |
| VersionId=pol_det.get("Policy", {}).get("DefaultVersionId", "") | |
| ) | |
| return policy_version_details\ | |
| .get("PolicyVersion", {})\ | |
| .get("Document", {}) | |