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| 1 | +#!/usr/bin/env python3 |
| 2 | +import boto3 |
| 3 | +import json |
| 4 | +import sys |
| 5 | +import argparse |
| 6 | + |
| 7 | +# https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-sourcing-external.html |
| 8 | + |
| 9 | +def _transform_creds(result, ak, sk): |
| 10 | + AK = result[ak] |
| 11 | + SAK = result[sk] |
| 12 | + transformed_creds = { |
| 13 | + "Version": 1, |
| 14 | + "AccessKeyId": AK, |
| 15 | + "SecretAccessKey": SAK |
| 16 | + } |
| 17 | + return transformed_creds |
| 18 | + |
| 19 | +def fetch_creds(region_name, secret_name, ak, sk, pr): |
| 20 | + ssm = boto3.Session(profile_name=pr).client('secretsmanager', region_name=region_name) |
| 21 | + value = ssm.get_secret_value(SecretId=secret_name) |
| 22 | + value = json.loads(value["SecretString"]) |
| 23 | + return _transform_creds(value, ak, sk) |
| 24 | + |
| 25 | +if __name__ == "__main__": |
| 26 | + parser = argparse.ArgumentParser( |
| 27 | + prog="cred_helper.py", |
| 28 | + description="Snags creds from Secrets manager for use in an AWS profile. Leveraging botocore builtins.", |
| 29 | + ) |
| 30 | + parser.add_argument( |
| 31 | + "--region", |
| 32 | + type=str, |
| 33 | + help="region name. otherwise use the default.", |
| 34 | + required=True |
| 35 | + ) |
| 36 | + parser.add_argument( |
| 37 | + "--secret-name", |
| 38 | + type=str, |
| 39 | + help="secret name to fetch", |
| 40 | + required=True |
| 41 | + ) |
| 42 | + parser.add_argument( |
| 43 | + "--access-key-index", |
| 44 | + type=str, |
| 45 | + help="secret name to fetch", |
| 46 | + required=True |
| 47 | + ) |
| 48 | + parser.add_argument( |
| 49 | + "--secret-access-key-index", |
| 50 | + type=str, |
| 51 | + help="secret name to fetch", |
| 52 | + required=True |
| 53 | + ) |
| 54 | + parser.add_argument( |
| 55 | + "--secret-profile", |
| 56 | + type=str, |
| 57 | + help="profile to use when fetching the secret", |
| 58 | + required=False, |
| 59 | + default="default" |
| 60 | + ) |
| 61 | + args = parser.parse_args() |
| 62 | + try: |
| 63 | + parsed_creds = fetch_creds( |
| 64 | + args.region, |
| 65 | + args.secret_name, |
| 66 | + args.access_key_index, |
| 67 | + args.secret_access_key_index, |
| 68 | + args.secret_profile |
| 69 | + ) |
| 70 | + json.dump(parsed_creds, sys.stdout, indent=2) |
| 71 | + except: |
| 72 | + raise |
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