feat(mimecast): new Mimecast anti-phishing integration

Email Security API, 11 commands: held-message list/release/reject, message search + info, managed URL create/list (block), block sender, create remediation, URL decode. HMAC-SHA1 signed auth, stdlib-only. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-11 23:46:35 +02:00
parent f826181704
commit 460dfaefba
12 changed files with 912 additions and 0 deletions
@@ -0,0 +1,69 @@
+import json, os, sys, hmac, hashlib, base64, uuid, datetime
+import urllib.request, urllib.error
+
+
+def _cfg():
+    return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
+
+
+def _inputs():
+    return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
+
+
+def call(uri, cfg, data_payload=None):
+    base_url = str(cfg.get("base_url", "")).rstrip("/")
+    app_id = str(cfg.get("app_id", ""))
+    app_key = str(cfg.get("app_key", ""))
+    access_key = str(cfg.get("access_key", ""))
+    secret_key = str(cfg.get("secret_key", ""))
+
+    request_id = str(uuid.uuid4())
+    hdr_date = datetime.datetime.utcnow().strftime("%a, %d %b %Y %H:%M:%S UTC")
+    to_sign = hdr_date + ":" + request_id + ":" + uri + ":" + app_key
+    sig = base64.b64encode(
+        hmac.new(base64.b64decode(secret_key), to_sign.encode("utf-8"), hashlib.sha1).digest()
+    ).decode("utf-8")
+
+    headers = {
+        "Authorization": "MC " + access_key + ":" + sig,
+        "x-mc-app-id": app_id,
+        "x-mc-date": hdr_date,
+        "x-mc-req-id": request_id,
+        "Content-Type": "application/json",
+        "Accept": "application/json",
+    }
+    body = {"data": [data_payload] if data_payload is not None else []}
+    req = urllib.request.Request(base_url + uri, data=json.dumps(body).encode("utf-8"), headers=headers, method="POST")
+    with urllib.request.urlopen(req, timeout=60) as r:
+        raw = r.read()
+        resp = json.loads(raw) if raw else {}
+    fails = resp.get("fail") if isinstance(resp, dict) else None
+    if fails:
+        # Mimecast returns errors in the 'fail' array even on HTTP 200
+        raise Exception("Mimecast error: " + json.dumps(fails))
+    return resp
+
+
+def _run(fn):
+    try:
+        print(json.dumps(fn(_cfg(), _inputs())))
+    except urllib.error.HTTPError as e:
+        print(json.dumps({"error": "HTTP " + str(e.code), "detail": e.read().decode("utf-8", "replace")}))
+        sys.exit(1)
+    except Exception as e:
+        print(json.dumps({"error": str(e)}))
+        sys.exit(1)
+
+
+def main(cfg, inputs):
+    message_id = inputs.get("message_id")
+    if not message_id:
+        raise Exception("message_id is required")
+    payload = {"id": message_id}
+    reason = inputs.get("reason")
+    if reason:
+        payload["message"] = reason
+    return call("/api/gateway/hold-reject", cfg, payload)
+
+
+_run(main)