gayhub上看到一個很叼很實用的腳本，可將ncm格式的音樂轉(zhuǎn)為mp3，記錄一下，放上大佬傳送門：

https://github.com/lianglixin/ncmdump

依賴pycrypto

pip(3) install pycrypto

直接貼代碼:

import binascii

import struct

import base64

import json

import os

from Crypto.Cipher import AES

def dump(file_path):

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('

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('

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('

f.seek(5, 1)

image_size = f.read(4)

image_size = struct.unpack('

image_data = f.read(image_size)

file_name = meta_data['musicName'] + '.' + meta_data['format']

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()

def file_name(file_dir):

for root, dirs, files in os.walk(file_dir):

for file in files:

if os.path.splitext(file)[1] == '.ncm':

dump(file)

print(file)

if __name__ == '__main__':

import sys

# if len(sys.argv) > 1:

# for file_path in sys.argv[1:]:

# try:

# dump(file_path)

# except:

# pass

# else:

# print("Usage: python ncmTransfer.py \"File Name\"")

try:

print(os.getcwd())

file_name(os.getcwd())

except:

print('不成')

把.py文件直接放到包含ncm歌曲的目錄中，執(zhí)行腳本就會把該目錄下所有ncm歌曲轉(zhuǎn)換為mp3

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