From b260c80c31f64a82fcbcc57929e64a0b7b4dc322 Mon Sep 17 00:00:00 2001
From: jesopo
Date: Thu, 20 Feb 2020 15:07:52 +0000
Subject: add bin/bitbot-log to read/decrypt channel_log files

---
 bin/bitbot-log | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100755 bin/bitbot-log

diff --git a/bin/bitbot-log b/bin/bitbot-log
new file mode 100755
index 00000000..da6d0c8b
--- /dev/null
+++ b/bin/bitbot-log
@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+
+import argparse
+
+arg_parser = argparse.ArgumentParser(
+    description="BitBot log decrypting utility")
+
+arg_parser.add_argument("key",
+    help="Location of private key for decrypting given log file")
+arg_parser.add_argument("log", help="Location of the log file to decrypt")
+
+args = arg_parser.parse_args()
+
+import base64
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.asymmetric import padding
+
+def a_decrypt(key, data):
+    out = key.decrypt(base64.b64decode(data), padding.OAEP(
+        mgf=padding.MGF1(algorithm=hashes.SHA256()),
+        algorithm=hashes.SHA256(), label=None))
+    return out.decode("utf8")
+
+with open(args.key, "rb") as key_file:
+    key_content = key_file.read()
+key = serialization.load_pem_private_key(
+    key_content, password=None, backend=default_backend())
+
+with open(args.log) as log_file:
+    lines = log_file.read().split("\n")
+lines = filter(None, lines)
+
+for line in lines:
+    if line[0] == "\x02":
+        line = a_decrypt(key, line[1:])
+    print(line)
-- 
cgit v1.3.1-10-gc9f91