mirror of
https://github.com/ghndrx/prowler.git
synced 2026-02-10 14:55:00 +00:00
e52ab12696
* fix(audit info): Common data structure for current audit * fix(iam): iam session audit fixed * feat(aws_session): Include else block Co-authored-by: Pepe Fagoaga <pepe@verica.io>
189 lines
8.3 KiB
Python
189 lines
8.3 KiB
Python
from arnparse import arnparse
|
|
from boto3 import session
|
|
from botocore.credentials import RefreshableCredentials
|
|
from botocore.session import get_session
|
|
|
|
from lib.arn.arn import arn_parsing
|
|
from lib.logger import logger
|
|
from providers.aws.models import AWS_Assume_Role, AWS_Audit_Info, AWS_Credentials
|
|
|
|
|
|
################## AWS PROVIDER
|
|
class AWS_Provider:
|
|
def __init__(self, audit_info):
|
|
logger.info("Instantiating aws provider ...")
|
|
self.aws_session = self.set_session(audit_info)
|
|
self.role_info = audit_info.assumed_role_info
|
|
|
|
def get_session(self):
|
|
return self.aws_session
|
|
|
|
def set_session(self, audit_info):
|
|
try:
|
|
if audit_info.credentials:
|
|
# If we receive a credentials object filled is coming form an assumed role, so renewal is needed
|
|
logger.info("Creating session for assumed role ...")
|
|
# From botocore we can use RefreshableCredentials class, which has an attribute (refresh_using)
|
|
# that needs to be a method without arguments that retrieves a new set of fresh credentials
|
|
# asuming the role again. -> https://github.com/boto/botocore/blob/098cc255f81a25b852e1ecdeb7adebd94c7b1b73/botocore/credentials.py#L395
|
|
assumed_refreshable_credentials = RefreshableCredentials(
|
|
access_key=audit_info.credentials.aws_access_key_id,
|
|
secret_key=audit_info.credentials.aws_secret_access_key,
|
|
token=audit_info.credentials.aws_session_token,
|
|
expiry_time=audit_info.credentials.expiration,
|
|
refresh_using=self.refresh,
|
|
method="sts-assume-role",
|
|
)
|
|
# Here we need the botocore session since it needs to use refreshable credentials
|
|
assumed_botocore_session = get_session()
|
|
assumed_botocore_session._credentials = assumed_refreshable_credentials
|
|
assumed_botocore_session.set_config_variable("region", "us-east-1")
|
|
|
|
return session.Session(
|
|
profile_name=audit_info.profile,
|
|
botocore_session=assumed_botocore_session,
|
|
)
|
|
# If we do not receive credentials start the session using the profile
|
|
else:
|
|
logger.info("Creating session for not assumed identity ...")
|
|
return session.Session(profile_name=audit_info.profile)
|
|
except Exception as error:
|
|
logger.critical(f"{error.__class__.__name__} -- {error}")
|
|
quit()
|
|
|
|
# Refresh credentials method using assume role
|
|
# This method is called "adding ()" to the name, so it cannot accept arguments
|
|
# https://github.com/boto/botocore/blob/098cc255f81a25b852e1ecdeb7adebd94c7b1b73/botocore/credentials.py#L570
|
|
def refresh(self):
|
|
logger.info("Refreshing assumed credentials...")
|
|
|
|
response = assume_role(self.role_info)
|
|
refreshed_credentials = dict(
|
|
# Keys of the dict has to be the same as those that are being searched in the parent class
|
|
# https://github.com/boto/botocore/blob/098cc255f81a25b852e1ecdeb7adebd94c7b1b73/botocore/credentials.py#L609
|
|
access_key=response["Credentials"]["AccessKeyId"],
|
|
secret_key=response["Credentials"]["SecretAccessKey"],
|
|
token=response["Credentials"]["SessionToken"],
|
|
expiry_time=response["Credentials"]["Expiration"].isoformat(),
|
|
)
|
|
logger.info("Refreshed Credentials:")
|
|
logger.info(refreshed_credentials)
|
|
return refreshed_credentials
|
|
|
|
|
|
def provider_set_session(
|
|
input_profile, input_role, input_session_duration, input_external_id, input_regions
|
|
):
|
|
|
|
# Mark variable that stores all the info about the audit as global
|
|
global current_audit_info
|
|
|
|
assumed_session = None
|
|
|
|
# Setting session
|
|
current_audit_info = AWS_Audit_Info(
|
|
original_session=None,
|
|
audit_session=None,
|
|
audited_account=None,
|
|
audited_partition=None,
|
|
profile=input_profile,
|
|
credentials=None,
|
|
assumed_role_info=AWS_Assume_Role(
|
|
role_arn=input_role,
|
|
session_duration=input_session_duration,
|
|
external_id=input_external_id,
|
|
),
|
|
audited_regions=input_regions,
|
|
)
|
|
|
|
logger.info("Generating original session ...")
|
|
# Create an global original session using only profile/basic credentials info
|
|
current_audit_info.original_session = AWS_Provider(current_audit_info).get_session()
|
|
logger.info("Validating credentials ...")
|
|
# Verificate if we have valid credentials
|
|
caller_identity = validate_credentials(current_audit_info.original_session)
|
|
|
|
logger.info("Credentials validated")
|
|
logger.info(f"Original caller identity UserId : {caller_identity['UserId']}")
|
|
logger.info(f"Original caller identity ARN : {caller_identity['Arn']}")
|
|
|
|
current_audit_info.audited_account = caller_identity["Account"]
|
|
current_audit_info.audited_partition = arnparse(caller_identity["Arn"]).partition
|
|
|
|
logger.info("Checking if role assumption is needed ...")
|
|
if current_audit_info.assumed_role_info.role_arn:
|
|
# Check if role arn is valid
|
|
try:
|
|
# this returns the arn already parsed, calls arnparse, into a dict to be used when it is needed to access its fields
|
|
role_arn_parsed = arn_parsing(current_audit_info.assumed_role_info.role_arn)
|
|
|
|
except Exception as error:
|
|
logger.critical(f"{error.__class__.__name__} -- {error}")
|
|
quit()
|
|
|
|
else:
|
|
logger.info(
|
|
f"Assuming role {current_audit_info.assumed_role_info.role_arn}"
|
|
)
|
|
# Assume the role
|
|
assumed_role_response = assume_role()
|
|
logger.info("Role assumed")
|
|
# Set the info needed to create a session with an assumed role
|
|
current_audit_info.credentials = AWS_Credentials(
|
|
aws_access_key_id=assumed_role_response["Credentials"]["AccessKeyId"],
|
|
aws_session_token=assumed_role_response["Credentials"]["SessionToken"],
|
|
aws_secret_access_key=assumed_role_response["Credentials"][
|
|
"SecretAccessKey"
|
|
],
|
|
expiration=assumed_role_response["Credentials"]["Expiration"],
|
|
)
|
|
assumed_session = AWS_Provider(current_audit_info).get_session()
|
|
|
|
if assumed_session:
|
|
logger.info("Audit session is the new session created assuming role")
|
|
current_audit_info.audit_session = assumed_session
|
|
current_audit_info.audited_account = role_arn_parsed.account_id
|
|
current_audit_info.audited_partition = role_arn_parsed.partition
|
|
else:
|
|
logger.info("Audit session is the original one")
|
|
current_audit_info.audit_session = current_audit_info.original_session
|
|
|
|
|
|
def validate_credentials(validate_session):
|
|
try:
|
|
validate_credentials_client = validate_session.client("sts")
|
|
caller_identity = validate_credentials_client.get_caller_identity()
|
|
except Exception as error:
|
|
logger.critical(f"{error.__class__.__name__} -- {error}")
|
|
quit()
|
|
else:
|
|
return caller_identity
|
|
|
|
|
|
def assume_role():
|
|
|
|
try:
|
|
# set the info to assume the role from the partition, account and role name
|
|
sts_client = current_audit_info.original_session.client("sts")
|
|
# If external id, set it to the assume role api call
|
|
if current_audit_info.assumed_role_info.external_id:
|
|
assumed_credentials = sts_client.assume_role(
|
|
RoleArn=current_audit_info.assumed_role_info.role_arn,
|
|
RoleSessionName="ProwlerProAsessmentSession",
|
|
DurationSeconds=current_audit_info.assumed_role_info.session_duration,
|
|
ExternalId=current_audit_info.assumed_role_info.external_id,
|
|
)
|
|
# else assume the role without the external id
|
|
else:
|
|
assumed_credentials = sts_client.assume_role(
|
|
RoleArn=current_audit_info.assumed_role_info.role_arn,
|
|
RoleSessionName="ProwlerProAsessmentSession",
|
|
DurationSeconds=current_audit_info.assumed_role_info.session_duration,
|
|
)
|
|
except Exception as error:
|
|
logger.critical(f"{error.__class__.__name__} -- {error}")
|
|
quit()
|
|
|
|
else:
|
|
return assumed_credentials
|