如何使用 boto 在 AWS iam 中获取用户的权限或组详细信息

Question

I have successfully fetched the users from AWS IAM using the python boto module.

Code:

import  boto
from boto.iam.connection import IAMConnection


    cfn = IAMConnection(aws_access_key_id='somekeyid',aws_secret_access_key ='secret_here')
    data = cfn.get_all_users()

    for user in data.users:
        print user,"\n"

How do I get the Groups or Permissions the user is associated with?

I added this line of code to get the group associated with the users and I am getting the error mentioned down below.

Added Code:

group=cfn.get_groups_for_user("Shital")
print group

where "Shital" is the user that exists and is being fetched from above. For test purposes, I am manually passing it to a function call.

Error:

Traceback (most recent call last):
  File "getuser.py", line 14, in <module>
    pol=cfn.get_groups_for_user("Shita")
  File "/home/tara/testinghere/IAM/env/local/lib/python2.7/site-packages/boto/iam/connection.py", line 509, in get_groups_for_user
    list_marker='Groups')
  File "/home/tara/testinghere/IAM/env/local/lib/python2.7/site-packages/boto/iam/connection.py", line 102, in get_response
    raise self.ResponseError(response.status, response.reason, body)
boto.exception.BotoServerError: BotoServerError: 403 Forbidden
<ErrorResponse xmlns="https://iam.amazonaws.com/doc/2010-05-08/">
  <Error>
    <Type>Sender</Type>
    <Code>AccessDenied</Code>
    <Message>User: arn:aws:iam::586848946515:user/qa-api-users is not authorized to perform: iam:ListGroupsForUser on resource: user Shita</Message>
  </Error>
  <RequestId>7e9a4b56-95f0-11e7-9bb0-8b8eb22708c5</RequestId>
</ErrorResponse>

Answer 1

Using credentials with suitable authority is essential for this query to work. As code_onkel points out, it makes sense to assign IAMFullAccess or AdministratorAccess as needed to complete the transaction successfully.

Answer 2

You are getting this error because you don't have permission to ListGroupUser. Because of that, you are getting this error User: arn:aws:iam::586848946515:user/qa-api-users is not authorized to perform: iam:ListGroupsForUser on resource: user Shita

You can create a role will allow you to list user details and you can add that role to your profile or you can use assume role. https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html

https://docs.aws.amazon.com/IAM/latest/APIReference/API_GetAccountSummary.html

Answer 3

There is several major caveats for this code:

1 - It assumes that you are using the default policy versions for all policies.

2 - It assumes that you have the permissions required.

3 - It is written using boto3 rather than the old boto.

Now that we have that out of the way, the code:

#! /bin/python3

import boto3

USERNAME = '<The desired username>'
policy_names = []

def get_groups_by_username(username):
    client = boto3.client('iam')
    groups_json = client.list_groups_for_user(UserName=username)['Groups']
    group_names = []
    for group in groups_json:
        group_names.append(group['GroupName'])
    return group_names


def get_group_policies(user_groups):
    client = boto3.client('iam')
    global policy_names
    for group in user_groups:
        # This is for AWS managed policies and returns both the policy ARN and name
        attached_group_policies = (client.list_attached_group_policies(GroupName=group)['AttachedPolicies'])
        for policy in attached_group_policies:
            policy_names.append(policy['PolicyName'])
        # This is for inline policies and returns only the policy name
        group_policies = (client.list_group_policies(GroupName=group)['PolicyNames'])
        for policy in group_policies:
            policy_names.append(policy)


def get_user_policies(username):
    client = boto3.client('iam')
    global policy_names
    # This is for AWS managed policies and returns both the policy ARN and name
    attached_user_policies = (client.list_attached_user_policies(UserName=username)['AttachedPolicies'])
    for policy in attached_user_policies:
        policy_names.append(policy['PolicyName'])
    # This is for inline policies and returns only the policy name
    user_policies = (client.list_user_policies(UserName=username)['PolicyNames'])
    for policy in user_policies:
        policy_names.append(policy)


get_user_policies(USERNAME)
groups = get_groups_by_username(USERNAME)
print("The user " + USERNAME + " belongs to the groups:")
print(groups)
get_group_policies(groups)
print("The user " + USERNAME + " has the following policies applied to it: ")
print(policy_names)