mirror of
https://github.com/ghndrx/prowler.git
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8b5c995486
Co-authored-by: Justin Moorcroft <justin.moorcroft@mwrcybersec.com> Co-authored-by: Pepe Fagoaga <pepe@verica.io>
260 lines
9.3 KiB
Python
260 lines
9.3 KiB
Python
import io
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import os
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import tempfile
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import zipfile
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from re import search
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from unittest.mock import patch
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import mock
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from boto3 import client, resource
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from moto import mock_iam, mock_lambda, mock_s3
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from prowler.providers.aws.services.awslambda.awslambda_service import AuthType, Lambda
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from tests.providers.aws.audit_info_utils import (
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AWS_ACCOUNT_NUMBER,
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AWS_REGION_EU_WEST_1,
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AWS_REGION_US_EAST_1,
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set_mocked_aws_audit_info,
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)
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LAMBDA_FUNCTION_CODE = """def lambda_handler(event, context):
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print("custom log event")
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return event
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"""
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def create_zip_file(code: str = "") -> io.BytesIO:
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zip_output = io.BytesIO()
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zip_file = zipfile.ZipFile(zip_output, "w", zipfile.ZIP_DEFLATED)
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if not code:
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zip_file.writestr(
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"lambda_function.py",
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LAMBDA_FUNCTION_CODE,
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)
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else:
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zip_file.writestr("lambda_function.py", code)
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zip_file.close()
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zip_output.seek(0)
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return zip_output
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def mock_request_get(_):
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"""Mock requests.get() to get the Lambda Code in Zip Format"""
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mock_resp = mock.MagicMock
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mock_resp.status_code = 200
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mock_resp.content = create_zip_file().read()
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return mock_resp
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# Mock generate_regional_clients()
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def mock_generate_regional_clients(service, audit_info):
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regional_client_eu_west_1 = audit_info.audit_session.client(
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service, region_name=AWS_REGION_EU_WEST_1
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)
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regional_client_us_east_1 = audit_info.audit_session.client(
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service, region_name=AWS_REGION_US_EAST_1
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)
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regional_client_eu_west_1.region = AWS_REGION_EU_WEST_1
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regional_client_us_east_1.region = AWS_REGION_US_EAST_1
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return {
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AWS_REGION_EU_WEST_1: regional_client_eu_west_1,
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AWS_REGION_US_EAST_1: regional_client_us_east_1,
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}
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@patch(
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"prowler.providers.aws.lib.service.service.generate_regional_clients",
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new=mock_generate_regional_clients,
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)
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class Test_Lambda_Service:
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# Test Lambda Client
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def test__get_client__(self):
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awslambda = Lambda(set_mocked_aws_audit_info([AWS_REGION_US_EAST_1]))
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assert (
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awslambda.regional_clients[AWS_REGION_EU_WEST_1].__class__.__name__
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== "Lambda"
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)
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# Test Lambda Session
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def test__get_session__(self):
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awslambda = Lambda(set_mocked_aws_audit_info([AWS_REGION_US_EAST_1]))
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assert awslambda.session.__class__.__name__ == "Session"
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# Test Lambda Service
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def test__get_service__(self):
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awslambda = Lambda(set_mocked_aws_audit_info([AWS_REGION_US_EAST_1]))
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assert awslambda.service == "lambda"
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@mock_lambda
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@mock_iam
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@mock_s3
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def test__list_functions__(self):
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# Create IAM Lambda Role
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iam_client = client("iam", region_name=AWS_REGION_EU_WEST_1)
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iam_role = iam_client.create_role(
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RoleName="test-lambda-role",
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AssumeRolePolicyDocument="test-policy",
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Path="/",
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)["Role"]["Arn"]
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# Create S3 Bucket
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s3_client = resource("s3", region_name=AWS_REGION_EU_WEST_1)
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s3_client.create_bucket(
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Bucket="test-bucket",
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CreateBucketConfiguration={"LocationConstraint": AWS_REGION_EU_WEST_1},
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)
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# Create Test Lambda 1
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lambda_client = client("lambda", region_name=AWS_REGION_EU_WEST_1)
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lambda_name_1 = "test-lambda-1"
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resp = lambda_client.create_function(
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FunctionName=lambda_name_1,
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Runtime="python3.7",
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Role=iam_role,
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Handler="lambda_function.lambda_handler",
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Code={"ZipFile": create_zip_file().read()},
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Description="test lambda function",
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Timeout=3,
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MemorySize=128,
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PackageType="ZIP",
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Publish=True,
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VpcConfig={
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"SecurityGroupIds": ["sg-123abc"],
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"SubnetIds": ["subnet-123abc"],
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},
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Environment={"Variables": {"db-password": "test-password"}},
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Tags={"test": "test"},
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)
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lambda_arn_1 = resp["FunctionArn"]
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# Update Lambda Policy
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lambda_policy = {
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"Version": "2012-10-17",
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"Id": "default",
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"Statement": [
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{
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"Action": "lambda:GetFunction",
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"Principal": "*",
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"Effect": "Allow",
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"Resource": f"arn:aws:lambda:{AWS_REGION_EU_WEST_1}:{AWS_ACCOUNT_NUMBER}:function:{lambda_name_1}",
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"Sid": "test",
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}
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],
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}
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_ = lambda_client.add_permission(
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FunctionName=lambda_name_1,
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StatementId="test",
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Action="lambda:GetFunction",
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Principal="*",
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)
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# Create Function URL Config
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_ = lambda_client.create_function_url_config(
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FunctionName=lambda_name_1,
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AuthType=AuthType.AWS_IAM.value,
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Cors={
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"AllowCredentials": True,
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"AllowHeaders": [
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"string",
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],
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"AllowMethods": [
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"string",
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],
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"AllowOrigins": [
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"*",
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],
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"ExposeHeaders": [
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"string",
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],
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"MaxAge": 123,
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},
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)
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# Create Test Lambda 2 (with the same attributes but different region)
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lambda_client_2 = client("lambda", region_name=AWS_REGION_US_EAST_1)
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lambda_name_2 = "test-lambda-2"
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resp_2 = lambda_client_2.create_function(
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FunctionName=lambda_name_2,
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Runtime="python3.7",
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Role=iam_role,
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Handler="lambda_function.lambda_handler",
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Code={"ZipFile": create_zip_file().read()},
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Description="test lambda function",
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Timeout=3,
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MemorySize=128,
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PackageType="ZIP",
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Publish=True,
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VpcConfig={
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"SecurityGroupIds": ["sg-123abc"],
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"SubnetIds": ["subnet-123abc"],
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},
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Environment={"Variables": {"db-password": "test-password"}},
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Tags={"test": "test"},
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)
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lambda_arn_2 = resp_2["FunctionArn"]
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with mock.patch(
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"prowler.providers.aws.services.awslambda.awslambda_service.requests.get",
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new=mock_request_get,
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):
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awslambda = Lambda(
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set_mocked_aws_audit_info(audited_regions=[AWS_REGION_US_EAST_1])
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)
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assert awslambda.functions
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assert len(awslambda.functions) == 2
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# Lambda 1
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assert awslambda.functions[lambda_arn_1].name == lambda_name_1
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assert awslambda.functions[lambda_arn_1].arn == lambda_arn_1
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assert awslambda.functions[lambda_arn_1].runtime == "python3.7"
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assert awslambda.functions[lambda_arn_1].environment == {
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"db-password": "test-password"
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}
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assert awslambda.functions[lambda_arn_1].region == AWS_REGION_EU_WEST_1
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assert awslambda.functions[lambda_arn_1].policy == lambda_policy
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assert awslambda.functions[lambda_arn_1].url_config
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assert (
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awslambda.functions[lambda_arn_1].url_config.auth_type
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== AuthType.AWS_IAM
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)
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assert search(
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"lambda-url.eu-west-1.on.aws",
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awslambda.functions[lambda_arn_1].url_config.url,
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)
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assert awslambda.functions[lambda_arn_1].url_config.cors_config
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assert awslambda.functions[
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lambda_arn_1
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].url_config.cors_config.allow_origins == ["*"]
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assert awslambda.functions[lambda_arn_1].tags == [{"test": "test"}]
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# Lambda 2
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assert awslambda.functions[lambda_arn_2].name == lambda_name_2
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assert awslambda.functions[lambda_arn_2].arn == lambda_arn_2
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assert awslambda.functions[lambda_arn_2].runtime == "python3.7"
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assert awslambda.functions[lambda_arn_2].environment == {
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"db-password": "test-password"
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}
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assert awslambda.functions[lambda_arn_2].region == AWS_REGION_US_EAST_1
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# Emtpy policy
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assert awslambda.functions[lambda_arn_2].policy == {
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"Id": "default",
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"Statement": [],
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"Version": "2012-10-17",
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}
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# Lambda Code
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with tempfile.TemporaryDirectory() as tmp_dir_name:
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for function, function_code in awslambda.__get_function_code__():
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if function.arn == lambda_arn_1 or function.arn == lambda_arn_2:
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assert search(
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f"s3://awslambda-{function.region}-tasks.s3-{function.region}.amazonaws.com",
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function_code.location,
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)
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assert function_code
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function_code.code_zip.extractall(tmp_dir_name)
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files_in_zip = next(os.walk(tmp_dir_name))[2]
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assert len(files_in_zip) == 1
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assert files_in_zip[0] == "lambda_function.py"
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with open(
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f"{tmp_dir_name}/{files_in_zip[0]}", "r"
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) as lambda_code_file:
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assert lambda_code_file.read() == LAMBDA_FUNCTION_CODE
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