AirlockTools/utils/allowlist.py

#    Copyright (C) 2025 James Brotosky, Brandon Wickline
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as published
#    by the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
import datetime
import requests
import json
import os
import pandas
import time
import utils.pretty as ct
import ijson
import os
from bson import ObjectId
import datetime

def pullPolicyExechistories(url, policiesnames, days, outputjson: bool):
   
    file_path = 'chunkinator.json'

    # Initialize file if it doesn't exist
    if not os.path.exists(file_path):
        with open(file_path, 'w') as file:
            json.dump({'error': 'Success', 'response': {'exechistories': []}}, file)
        print(f"File '{file_path}' has been created.")
    else:
        print(f"File '{file_path}' already exists.")

    headers = {"X-APIKey": os.getenv('APIKEY')}

    checkpoint = str(skipback(days))
    json_output = {'error': 'Success', 'response': {'exechistories': []}}

    while True:
        json_response_data = checkpoint_stomper(checkpoint, url, policiesnames, headers)
        histories = json_response_data['response']['exechistories']
        if not histories:
            break

        array_dividend = max(round(len(histories) / 20), 1)
        match_found = False

        for index, item in enumerate(histories[::array_dividend]):
            item_date = datetime.datetime.strptime(item['datetime'].replace(' +0000 UTC', ''), '%Y-%m-%dT%H:%M:%SZ').date()
            if item_date >= datetime.date.today() - datetime.timedelta(days):
                match_found = True
                break

        checkpoints_processed = round(len(histories) / array_dividend)
        print(ct.colorText(
            f"{index + 1}/{checkpoints_processed} checkpoint(s) processed. "
            f"{'Found with Date Match.' if match_found else ''} Last Checkpoint: {item['checkpoint']}.", "blue"))

        checkpoint = item['checkpoint']

        if match_found:
            for item in histories:
                item_date = datetime.datetime.strptime(item['datetime'].replace(' +0000 UTC', ''), '%Y-%m-%dT%H:%M:%SZ').date()
                if item_date >= datetime.date.today() - datetime.timedelta(days):
                    json_output['response']['exechistories'].append(item)

            # Deduplicate and write to file
            seen = {}
            if os.path.exists(file_path):
                with open(file_path, 'r') as file:
                    existing_data = json.load(file)
                combined = existing_data['response']['exechistories'] + json_output['response']['exechistories']
            else:
                combined = json_output['response']['exechistories']

            for item in combined:
                key = (item.get('sha256'), item.get('filename'), item.get('hostname'))
                seen[key] = item

            deduplicated = list(seen.values())
            with open(file_path, 'w') as file:
                json.dump({'error': 'Success', 'response': {'exechistories': deduplicated}}, file)

            # Reset output to free memory
            json_output['response']['exechistories'].clear()

    # Final output
    with open(file_path, 'r') as file:
        final_output = json.load(file)
    os.remove(file_path)

    return json.dumps(final_output) if outputjson else None


def checkpoint_stomper(checkpoint, url, policy, headers):
    json_output = {'error': 'Success', 'response': {'exechistories': []}}
    endpoint = url + '/v1/logging/exechistories'
    payload_dict = {
        "type":[1,2,6,7],
        "checkpoint": checkpoint,
        "policy": [policy]
    }
    payload = json.dumps(payload_dict)
    with requests.request("POST", endpoint, headers=headers, data=payload, verify=False, stream=True) as response:
        parser = ijson.items(response.raw, 'response.exechistories.item')
        for item in parser:
            key = (item.get('sha256'), item.get('hostname'))
            if key not in json_output:
                json_output['response']['exechistories'].append(item)   
    parse_text = json.loads(json.dumps(json_output))
    return parse_text

def listPolicies(url): 
    endpoint = url + '/v1/group'
    print(ct.colorText("[+] Grabbing All Policies", "cyan"))
    payload = {}
    headers = {
        "X-APIKey": os.getenv('APIKEY')
    }
    response = requests.request("POST", endpoint, headers=headers, data=payload, verify=False)
    parse_text = json.loads(response.text)
    policiesnames = []
    policyids = []
    for index, list in enumerate(parse_text['response']['groups'], start=1):
        print(ct.colorText(f"{index}. {list['name']}", "yellow"))
        policiesnames.append(list['name'])
        policyids.append(list['groupid'])
    choice = input(ct.colorText("Select Policy Group: ", "white"))
    choice = int(choice) - 1
    return choice, policiesnames, policyids

def listAllowlists(url): 
    endpoint = url + '/v1/application'
    print(ct.colorText("[+] Grabbing All Allowlists", "cyan"))
    payload = {}
    headers = {
        "X-APIKey": os.getenv('APIKEY')
    }
    response = requests.request("POST", endpoint, headers=headers, data=payload, verify=False)
    parse_text = json.loads(response.text)
    policiesnames = []
    policyids = []
    for index, list in enumerate(parse_text['response']['applications'], start=1):
        if index >= 38:
            print(ct.colorText(f"{index}. {list['name']}", "yellow"))
            policiesnames.append(list['name'])
            policyids.append(list['applicationid'])
    choice = int(input(ct.colorText("Select allowlist: ", "white")))
    if choice < 38:
        print(ct.colorText("Please only choose an allowlist designed for this use - '38+'","red"))
    elif choice >= 38:
        choice = choice - 38
        return choice, policiesnames, policyids
    #Need else and catch for upper bound


def skipback(days):
    """
    Generate a MongoDB ObjectId for a given number of days ago from today.
    Adds 1 extra day to the input to look further back.
    """
    adjusted_days = days + 1
    date_days_ago = datetime.datetime.now(datetime.UTC) - datetime.timedelta(days=adjusted_days)
    timestamp = int(date_days_ago.timestamp())
    hex_timestamp = format(timestamp, '08x')
    objectid_hex = hex_timestamp + '0000000000000000'
    return ObjectId(objectid_hex)