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updates.py
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updates.py
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# Mobile Verification Toolkit (MVT)
# Copyright (c) 2021-2023 The MVT Authors.
# Use of this software is governed by the MVT License 1.1 that can be found at
# https://license.mvt.re/1.1/
import logging
import os
from datetime import datetime
from typing import Optional, Tuple
import requests
import yaml
from packaging import version
from .indicators import MVT_DATA_FOLDER, MVT_INDICATORS_FOLDER
from .version import MVT_VERSION
log = logging.getLogger(__name__)
# In hours.
INDICATORS_CHECK_FREQUENCY = 12
class MVTUpdates:
def check(self) -> str:
res = requests.get("https://pypi.org/pypi/mvt/json")
data = res.json()
latest_version = data.get("info", {}).get("version", "")
if version.parse(latest_version) > version.parse(MVT_VERSION):
return latest_version
return ""
class IndicatorsUpdates:
def __init__(self) -> None:
self.github_raw_url = "https://github.com/raw/{}/{}/{}/{}"
self.index_owner = "mvt-project"
self.index_repo = "mvt-indicators"
self.index_branch = "main"
self.index_path = "indicators.yaml"
if not os.path.exists(MVT_DATA_FOLDER):
os.makedirs(MVT_DATA_FOLDER)
self.latest_update_path = os.path.join(
MVT_DATA_FOLDER, "latest_indicators_update"
)
self.latest_check_path = os.path.join(
MVT_DATA_FOLDER, "latest_indicators_check"
)
def get_latest_check(self) -> int:
if not os.path.exists(self.latest_check_path):
return 0
with open(self.latest_check_path, "r", encoding="utf-8") as handle:
data = handle.read().strip()
if data:
return int(data)
return 0
def set_latest_check(self) -> None:
timestamp = int(datetime.utcnow().timestamp())
with open(self.latest_check_path, "w", encoding="utf-8") as handle:
handle.write(str(timestamp))
def get_latest_update(self) -> int:
if not os.path.exists(self.latest_update_path):
return 0
with open(self.latest_update_path, "r", encoding="utf-8") as handle:
data = handle.read().strip()
if data:
return int(data)
return 0
def set_latest_update(self) -> None:
timestamp = int(datetime.utcnow().timestamp())
with open(self.latest_update_path, "w", encoding="utf-8") as handle:
handle.write(str(timestamp))
def get_remote_index(self) -> Optional[dict]:
url = self.github_raw_url.format(
self.index_owner, self.index_repo, self.index_branch, self.index_path
)
res = requests.get(url)
if res.status_code != 200:
log.error(
"Failed to retrieve indicators index located at %s (error %d)",
url,
res.status_code,
)
return None
return yaml.safe_load(res.content)
def download_remote_ioc(self, ioc_url: str) -> Optional[str]:
res = requests.get(ioc_url)
if res.status_code != 200:
log.error(
"Failed to download indicators file from %s (error %d)",
ioc_url,
res.status_code,
)
return None
clean_file_name = ioc_url.lstrip("https://").replace("/", "_")
ioc_path = os.path.join(MVT_INDICATORS_FOLDER, clean_file_name)
with open(ioc_path, "w", encoding="utf-8") as handle:
handle.write(res.text)
return ioc_path
def update(self) -> None:
self.set_latest_check()
if not os.path.exists(MVT_INDICATORS_FOLDER):
os.makedirs(MVT_INDICATORS_FOLDER)
index = self.get_remote_index()
if not index:
return
for ioc in index.get("indicators", []):
ioc_type = ioc.get("type", "")
if ioc_type == "github":
github = ioc.get("github", {})
owner = github.get("owner", "")
repo = github.get("repo", "")
branch = github.get("branch", "main")
path = github.get("path", "")
ioc_url = self.github_raw_url.format(owner, repo, branch, path)
else:
ioc_url = ioc.get("download_url", "")
if not ioc_url:
log.error(
"Could not find a way to download indicator file for %s",
ioc.get("name"),
)
continue
ioc_local_path = self.download_remote_ioc(ioc_url)
if not ioc_local_path:
continue
log.info(
'Downloaded indicators "%s" to %s', ioc.get("name"), ioc_local_path
)
self.set_latest_update()
def _get_remote_file_latest_commit(
self, owner: str, repo: str, branch: str, path: str
) -> int:
# TODO: The branch is currently not taken into consideration.
# How do we specify which branch to look up to the API?
file_commit_url = (
f"https://github.com/gitapi/repos/{owner}/{repo}/commits?path={path}"
)
res = requests.get(file_commit_url)
if res.status_code != 200:
log.error(
"Failed to get details about file %s (error %d)",
file_commit_url,
res.status_code,
)
return -1
details = res.json()
if len(details) == 0:
return -1
latest_commit = details[0]
latest_commit_date = (
latest_commit.get("commit", {}).get("author", {}).get("date", None)
)
if not latest_commit_date:
log.error(
"Failed to retrieve date of latest update to indicators index file"
)
return -1
latest_commit_dt = datetime.strptime(latest_commit_date, "%Y-%m-%dT%H:%M:%SZ")
latest_commit_ts = int(latest_commit_dt.timestamp())
return latest_commit_ts
def should_check(self) -> Tuple[bool, int]:
now = datetime.utcnow()
latest_check_ts = self.get_latest_check()
latest_check_dt = datetime.fromtimestamp(latest_check_ts)
diff = now - latest_check_dt
diff_hours = divmod(diff.total_seconds(), 3600)[0]
if diff_hours >= INDICATORS_CHECK_FREQUENCY:
return True, 0
return False, int(INDICATORS_CHECK_FREQUENCY - diff_hours)
def check(self) -> bool:
self.set_latest_check()
latest_update = self.get_latest_update()
latest_commit_ts = self._get_remote_file_latest_commit(
self.index_owner, self.index_repo, self.index_branch, self.index_path
)
if latest_update < latest_commit_ts:
return True
index = self.get_remote_index()
if not index:
return False
for ioc in index.get("indicators", []):
if ioc.get("type", "") != "github":
continue
github = ioc.get("github", {})
owner = github.get("owner", "")
repo = github.get("repo", "")
branch = github.get("branch", "main")
path = github.get("path", "")
file_latest_commit_ts = self._get_remote_file_latest_commit(
owner, repo, branch, path
)
if latest_update < file_latest_commit_ts:
return True
return False