#!/usr/bin/python3
# Modifier: Liang Lixin
# Folder dump version by LiangLixin
import binascii
import struct
import base64
import json
import os
import logging
import urllib
import requests
import time
from Crypto.Cipher import AES
music_suffix_list = ['mp3', 'wav', 'ape', 'flac', 'MP3', 'WAV', 'APE', 'FLAC']
def dump(file_path, file_name_no_suffix):
core_key = binascii.a2b_hex("687A4852416D736F356B496E62617857")
meta_key = binascii.a2b_hex("2331346C6A6B5F215C5D2630553C2728")
unpad = lambda s : s[0:-(s[-1] if type(s[-1]) == int else ord(s[-1]))]
f = open(file_path,'rb')
header = f.read(8)
assert binascii.b2a_hex(header) == b'4354454e4644414d'
f.seek(2, 1)
key_length = f.read(4)
key_length = struct.unpack('<I', bytes(key_length))[0]
key_data = f.read(key_length)
key_data_array = bytearray(key_data)
for i in range (0,len(key_data_array)): key_data_array[i] ^= 0x64
key_data = bytes(key_data_array)
cryptor = AES.new(core_key, AES.MODE_ECB)
key_data = unpad(cryptor.decrypt(key_data))[17:]
key_length = len(key_data)
key_data = bytearray(key_data)
key_box = bytearray(range(256))
c = 0
last_byte = 0
key_offset = 0
for i in range(256):
swap = key_box[i]
c = (swap + last_byte + key_data[key_offset]) & 0xff
key_offset += 1
if key_offset >= key_length: key_offset = 0
key_box[i] = key_box[c]
key_box[c] = swap
last_byte = c
meta_length = f.read(4)
meta_length = struct.unpack('<I', bytes(meta_length))[0]
meta_data = f.read(meta_length)
meta_data_array = bytearray(meta_data)
for i in range(0,len(meta_data_array)): meta_data_array[i] ^= 0x63
meta_data = bytes(meta_data_array)
meta_data = base64.b64decode(meta_data[22:])
cryptor = AES.new(meta_key, AES.MODE_ECB)
meta_data = unpad(cryptor.decrypt(meta_data)).decode('utf-8')[6:]
meta_data = json.loads(meta_data)
crc32 = f.read(4)
crc32 = struct.unpack('<I', bytes(crc32))[0]
f.seek(5, 1)
image_size = f.read(4)
image_size = struct.unpack('<I', bytes(image_size))[0]
image_data = f.read(image_size)
file_name = file_name_no_suffix + '.' + meta_data['format']
## delete
# try:
# os.remove(os.path.join(os.path.split(file_path)[0], meta_data['musicName'] + '.' + meta_data['format']))
# print('删除文件 :' + os.path.join(os.path.split(file_path)[0], meta_data['musicName'] + '.' + meta_data['format']))
# ## delete
# except Exception as e:
# print('删除失败', e)
m = open(os.path.join(os.path.split(file_path)[0],file_name),'wb')
chunk = bytearray()
while True:
chunk = bytearray(f.read(0x8000))
chunk_length = len(chunk)
if not chunk:
break
for i in range(1,chunk_length+1):
j = i & 0xff;
chunk[i-1] ^= key_box[(key_box[j] + key_box[(key_box[j] + j) & 0xff]) & 0xff]
m.write(chunk)
m.close()
f.close()
try:
urllib.request.urlretrieve(meta_data['albumPic'], os.path.join(os.path.split(file_path)[0], file_name_no_suffix) + '.jpg');
except Exception as e:
print('下载专辑图片出错', e)
def file_extension(path):
return os.path.splitext(path)[1]
def file_no_extension(path):
return os.path.splitext(path)[0]
def file_exist(file_name, file_list, file_list_path):
for file in file_list:
if (os.path.isdir(os.path.join(file_list_path, file))):
# print('######### 文件夹, 跳过')
continue
for suffix in music_suffix_list:
if (file_no_extension(file_name) + "." + suffix) == file:
return True;
return False;
def recursion(file_name, root_dir, file_list):
# print('root_dir: ' + root_dir)
# print('file_name: ' + file_name)
full_file = os.path.join(root_dir, file_name)
if os.path.isfile(full_file):
print('>>>>>>>>>>>>>>>> 当前文件: ' + full_file)
if file_extension(full_file) == ".ncm":
# 校验文件存在同名
if file_exist(file_name, file_list, root_dir):
print('>>>>>>>>>>>>>>> 同名文件跳过: ' + full_file)
return
try:
print('>>>>>>>>>>>>>>> 开始转码文件: ' + full_file)
dump(full_file, file_no_extension(file_name));
print('>>>>>>>>>>>>>>> 转码文件成功: ' + full_file)
except Exception as err:
print('转码文件失败: ' + full_file + ' error: ' + err)
else:
print('>>>>>>>>>>>>>>> 非ncm文件, 跳过')
elif os.path.isdir(full_file):
print('>>>>>>>>>>>>>>> 处理当前文件夹内容: ' + full_file)
list = os.listdir(full_file)
for i in range(0, len(list)):
recursion(list[i], full_file, list)
if __name__ == '__main__':
import sys
if len(sys.argv) > 1:
rootdir = sys.argv[1]; #如果有输入路径参数，取当前路径参数
else:
# 没写路径默认走当前文件夹
rootdir = os.path.split(os.path.realpath(__file__))[0];
print('>>>>>>>>>>>>>>> 初始路径层级: ' + rootdir)
list = os.listdir(rootdir) # Get all files in folder.is
for i in range(0,len(list)):
try:
recursion(list[i], rootdir, list)
except Exception as e:
print('递归处理出现错误');
logging.exception(e)
finally:
pass
print('全部文件处理完成 ' + time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()));https://stackoverflow.com/questions/19623267/importerror-no-module-named-crypto-cipher
pip3 uninstall crypto
pip3 uninstall pycrypto
pip3 install pycryptodome
然后就可以了
python3 tr.py
一个目录下的文件会被自动转换掉
fork from：https://github.com/waterkokoro/ncmTranslatorScript_pythonhttps://github.com/lemonhall/ncmTran_mac
里面有ZIP包可以直接用
pip install pyinstaller
pyinstaller --onefile .\tr.py打包方式为以上
运行方式是：
.\tr.exe ./