Initial tool commit

.gitignore

@@ -33,4 +33,7 @@ nosetests.xml
 # Mr Developer
 .mr.developer.cfg
 .project
-.pydevproject
+.pydevproject
+
+# Ask me for the key ;)
+dlc2txt_KEY.py

README.md

@@ -1,3 +1,12 @@
 DLCDecrypt
 ==========
+This little tool can decrypt DLC Files.
+Many thanks goes out to the folks of PyLoad. This code is mostly a ripoff of their DLC code modified to run alone.
+Checkout pyload at: http://pyload.org/
 
+### Usage:
+```
+./dlc2txt dlcFile.dlc
+```
+
+This produces a file named after the given name in the DLC.

dlc2txt.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import sys
+import urllib
+import re
+import requests
+import base64
+import xml.dom.minidom
+from Crypto.Cipher import AES
+
+def decrypt(fs_filename):
+	KEY     = ""
+	IV      = ""
+	API_URL = "http://service.jdownloader.org/dlcrypt/service.php?srcType=dlc&destType=pylo&data=%s"
+
+	with open(fs_filename) as dlc:
+		data = dlc.read().strip()
+	data += '=' * (-len(data) % 4)
+	dlc_key = data[-88:]
+	dlc_data = base64.b64decode(data[:-88])
+	dlc_content = load(API_URL % dlc_key)
+	print(dlc_content)
+
+	try:
+		rc = base64.b64decode(re.search(r'<rc>(.+)</rc>', dlc_content, re.S).group(1))
+	except AttributeError:
+		print("Error: invalid DLC")
+
+	key = iv = (AES.new(KEY, AES.MODE_CBC, IV).decrypt(rc)).decode('utf-8')
+	data     = base64.b64decode(AES.new(key, AES.MODE_CBC, iv).decrypt(dlc_data)).decode('utf-8', 'ignore')
+	plainData = get_packages(data)[0]
+	print('\n'.join(plainData[1]))
+	with open(plainData[0], mode='wt', encoding='utf-8') as rawLinkFile:
+		rawLinkFile.write('\n'.join(plainData[1]))
+
+def load(url):
+	r = requests.get(url)
+	return r.text
+
+def fixurl(url):
+	return urllib.unquote(url.decode('unicode-escape')).strip().rstrip('/')
+
+def get_packages(data):
+	root    = xml.dom.minidom.parseString(data).documentElement
+	content = root.getElementsByTagName("content")[0]
+	return parse_packages(content)
+
+def parse_packages(startNode):
+	return [(decode(base64.b64decode(decode(node.getAttribute("name")))), parse_links(node)) for node in startNode.getElementsByTagName("package")]
+
+def parse_links(startNode):
+	return [decode(base64.b64decode(node.getElementsByTagName("url")[0].firstChild.data)) for node in startNode.getElementsByTagName("file")]
+
+def decode(string):
+	try:
+		return string.decode("utf8", "replace")
+	except:
+		return string
+
+decrypt(sys.argv[1])