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Verify signature based on header #2

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Verify signature based on header #2

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15 changes: 12 additions & 3 deletions gitea_matrix/bot.py
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,9 @@

from pprint import pprint

import json
import hmac


class GiteaBot(Plugin):
task_list: List[Task]
Expand Down Expand Up @@ -113,10 +116,16 @@ async def process_hook_01(self, req: Request) -> None:

try:
msg = None
body = await req.json()

if body["secret"] != self.config["webhook-secret"]:
self.log.error("Failed to handle Gitea event: secret doesnt match.")
raw = await req.content.read() # We need the raw bytes
charset = req.charset or 'utf-8'
body = json.loads(raw.decode(encoding=charset))

signature = req.headers['X-Gitea-Signature']
payload_signature = hmac.new(self.config["webhook-secret"].encode('utf-8'), raw, digestmod="sha256")

if not hmac.compare_digest(signature, payload_signature.hexdigest()):
self.log.error("Failed to handle Gitea event: Could not verify signature.")
else:
event = req.headers["X-Gitea-Event"]
if event == 'push':
Expand Down