testing_service.py

import re

#import ansible_runner
import yaml
import uuid
import sys
import os
import time
import requests
from modules.DataManipulation import DataManipulation
from modules import utils
from modules import splunk_sdk
import timeit
from typing import Union, Tuple
from os.path import relpath
from tempfile import mkdtemp, mkstemp
import datetime
import http.client




def test_detection_wrapper(container_name:str, splunk_ip:str, splunk_password:str, splunk_port:int, 
                           detection_file:str, attack_data_root_folder, wait_on_failure:bool=False, wait_on_completion:bool=False)->dict:
    
    one_test_start = timeit.default_timer()
    uuid_var = str(uuid.uuid4())
    result_test, indices_to_delete = test_detection(splunk_ip, splunk_port, container_name, splunk_password, detection_file, uuid_var, attack_data_root_folder)
    one_test_stop = timeit.default_timer()
    
    if result_test is None:
        #We failed so early in the process that we could not produce any meaningful result
        raise(Exception("Test execution Error"))    

    #enter = input("Run some tests from [%s] on [%s] - we don't delete until you hit enter :)"%(container_name, test_file))
    # delete test data
    search_string = result_test['detection_result']['search_string']
    
    #get pretty time info
    elapsed_search_time_string = str(datetime.timedelta(seconds=round(one_test_stop - one_test_start)))

    #search failed if there was an error or the detection failed to produce the expected result
    #print("Elapsed search time: %s"%(elapsed_search_time_string))
    if (wait_on_failure or wait_on_completion) and (result_test['detection_result']['error'] or not result_test['detection_result']['success']):
        wait_on_delete = {'message':"\n\n\n****SEARCH FAILURE : Allowing time to debug search/data****"}
    elif wait_on_completion:
        wait_on_delete = {'message':"\n\n\n****SEARCH SUCCESS : Allowing time to examine search/data****"}
    else:
        wait_on_delete = None


    splunk_sdk.delete_attack_data(splunk_ip, splunk_password, splunk_port, wait_on_delete, search_string, detection_file, indices = indices_to_delete)
   

    return result_test    


import splunklib.client as client
def get_service(splunk_ip:str, splunk_port:int, splunk_password:str):

    try:
        service = client.connect(
            host=splunk_ip,
            port=splunk_port,
            username='admin',
            password=splunk_password
        )
    except Exception as e:
        raise(Exception("Unable to connect to Splunk instance: " + str(e)))
    return service

def test_detection(splunk_ip:str, splunk_port:int, container_name:str, splunk_password:str, detection_file:str, uuid_var, attack_data_root_folder)->Tuple[Union[dict,None], set[str]]:
    
    detection_file_obj = load_file(os.path.join("security_content/", detection_file))
    
    
    if not detection_file_obj:
        print("Not detection_file_obj!")
        raise(Exception("No test file object found for [%s]"%detection_file))
    #print(test_file_obj)

    # write entry dynamodb
    #aws_service.add_detection_results_in_dynamo_db('eu-central-1', uuid_var , uuid_test, test_file_obj['tests'][0]['name'], test_file_obj['tests'][0]['file'], str(int(time.time())))

    #epoch_time = str(int(time.time()))
    

    abs_folder_path = mkdtemp(prefix="DATA_", dir=attack_data_root_folder)
    #We want the relative path, so we convert it as required
    


    
    tests:dict = detection_file_obj.get("tests", {}) 
    if len(tests) > 1:
        print(f"****WARNING - THIS DETECTION CONTAINS {len(tests)} TESTS BUT WE WILL ONLY RUN 1")
    test = tests[0]
    indices_to_delete = set()

    for attack_data in test['attack_data']:
        url = attack_data['data']
        
        if 'custom_index' in attack_data:
            print(f"Found a custom index for {detection_file}: {attack_data['custom_index']}")
            data_upload_index = attack_data['custom_index']
        else:
            data_upload_index = splunk_sdk.DEFAULT_DATA_INDEX

        indices_to_delete.add(data_upload_index)
        
        _, target_file = mkstemp(prefix="attack_data_", dir=abs_folder_path)
        
        utils.download_file_from_http(url, target_file, overwrite_file=True)
        


        # Update timestamps before replay
        if 'update_timestamp' in attack_data:
            if attack_data['update_timestamp'] == True:
                data_manipulation = DataManipulation()
                data_manipulation.manipulate_timestamp(target_file, attack_data['sourcetype'], attack_data['source'])
        #replay_attack_dataset(container_name, splunk_password, folder_name, "test0", attack_data['sourcetype'], attack_data['source'], attack_data['file_name'])
        
        try:
            service = get_service(splunk_ip, splunk_port, splunk_password)
            test_index = service.indexes[data_upload_index]
            
            with open(target_file, 'rb') as target:
                test_index.submit(target.read(), sourcetype=attack_data['sourcetype'], source=attack_data['source'], host=splunk_sdk.DEFAULT_EVENT_HOST)
        
        except http.client.HTTPException as e:
            raise(Exception(f"Failed to submit detection file {target_file} to Splunk Server: {str(e)}"))
            
        except Exception as e:
            raise(Exception(f"Failed to submit detection file {target_file} to Splunk Server: {str(e)}"))
            
            


        if not splunk_sdk.wait_for_indexing_to_complete(splunk_ip, splunk_port, splunk_password, attack_data['sourcetype'], data_upload_index):
            raise Exception("There was an error waiting for indexing to complete.")
        
    #Allow some time for the data to be ingested and processed
    #print("begin sleep 30")
    #time.sleep(60)

    
    #print("end sleep 30")
    
    result_test = {}
    
    

    if 'baselines' in test:
        results_baselines = []
        for baseline_obj in test['baselines']:
            baseline_file_name = baseline_obj['file']
            baseline = load_file(os.path.join(os.path.dirname(__file__), '../security_content', baseline_file_name))
            result_obj = dict()
            result_obj['baseline'] = baseline_obj['name']
            result_obj['baseline_file'] = baseline_file_name
            print("Making test_baseline_search request to: [%s:%d]"%(splunk_ip, splunk_port))
            result = splunk_sdk.test_baseline_search(splunk_ip, splunk_port, splunk_password, baseline['search'], baseline_obj['pass_condition'], baseline['name'], baseline_file_name, baseline_obj['earliest_time'], baseline_obj['latest_time'])
            #we don't seem to be doing anything with this loop... are we supposed to have the following line belwo?
            results_baselines.append(result)

        result_test['baselines_result'] = results_baselines  

    
    
    
    result_detection = splunk_sdk.test_detection_search(splunk_ip, splunk_port, splunk_password, detection_file_obj['search'], test.get('pass_condition', '| stats count | where count > 0'), detection_file_obj['name'], detection_file, test.get('earliest_time', '-24h'), test.get('latest_time', 'now'))
    if result_detection['error']:
        print("There was an error running the search: %s"%(result_detection['search_string']))
        




    result_detection['detection_name'] = test['name']
    result_detection['detection_file'] = detection_file
    result_test['detection_result'] = result_detection
    result_test['attack_data_directory'] = abs_folder_path


    return result_test, indices_to_delete


def load_file(file_path):
    try:

        with open(file_path, 'r', encoding="utf-8") as stream:
            try:
                file = list(yaml.safe_load_all(stream))[0]
            except yaml.YAMLError as exc:
                raise(Exception("ERROR: parsing YAML for {0}:[{1}]".format(file_path, str(exc))))
    except Exception as e:
        raise(Exception("ERROR: opening {0}:[{1}]".format(file_path, str(e))))
    return file