Python 3 compatible script to rotate aws access keys

rotate_aws_keys.py

'''
  Rotate AWS access keys for each profile in the users ${HOME}/.aws/credentials file.
    Note: the default profile is not altered
  Author: John Auld
'''

import configparser
import os
import boto3

aws_credentials_file = str.join('\\', (os.path.expanduser('~\\.aws'), 'credentials'))

config = configparser.ConfigParser()
config.read(aws_credentials_file)

for aws_account in config.sections():
    if (aws_account != 'default'):
        print("Rotating access key for: %s" % aws_account)

        old_key = config[aws_account]['aws_access_key_id']
        old_secret = config[aws_account]['aws_secret_access_key']

        sts_client = boto3.client(
            'sts',
            aws_access_key_id = old_key,
            aws_secret_access_key = old_secret,
        )
        
        iam_client = boto3.client(
            'iam',
            aws_access_key_id = old_key,
            aws_secret_access_key = old_secret,
        )

        caller_identity = sts_client.get_caller_identity()
        aws_user = caller_identity['Arn'].split('/')[1]

        response = iam_client.create_access_key(
            UserName = aws_user,
        )

        config[aws_account]['aws_access_key_id'] = response['AccessKey']['AccessKeyId']
        config[aws_account]['aws_secret_access_key'] = response['AccessKey']['SecretAccessKey']

        with open(aws_credentials_file, 'w') as configfile:
            config.write(configfile)

        iam_client.delete_access_key(
            AccessKeyId = old_key,
            UserName = aws_user,
        )