Delete tools/mega.py

tools/mega.py

@@ -1,122 +0,0 @@
-import os
-import re
-import json
-import codecs
-import random
-import base64
-import struct
-import shutil
-import requests
-import tempfile
-
-from Crypto.Cipher import AES
-from Crypto.Util import Counter
-
-def makebyte(x):
-    return codecs.latin_1_encode(x)[0]
-
-def a32_to_str(a):
-    return struct.pack('>%dI' % len(a), *a)
-
-def get_chunks(size):
-    p, s = 0, 0x20000
-
-    while p + s < size:
-        yield(p, s)
-        p += s
-
-        if s < 0x100000: s += 0x20000
-
-    yield(p, size - p)
-
-def aes_cbc_decrypt(data, key):
-    aes_cipher = AES.new(key, AES.MODE_CBC, makebyte('\0' * 16))
-    return aes_cipher.decrypt(data)
-
-def decrypt_attr(attr, key):
-    attr = codecs.latin_1_decode(aes_cbc_decrypt(attr, a32_to_str(key)))[0].rstrip('\0')
-    return json.loads(attr[4:]) if attr[:6] == 'MEGA{"' else False
-
-def _api_request(data):
-    sequence_num = random.randint(0, 0xFFFFFFFF)
-    params = {'id': sequence_num}
-    sequence_num += 1
-
-    if not isinstance(data, list): data = [data]
-    json_resp = json.loads(requests.post('{0}://g.api.{1}/cs'.format('https', 'mega.co.nz'), params=params, data=json.dumps(data), timeout=160).text)
-    if isinstance(json_resp, int): raise Exception(json_resp)
-
-    return json_resp[0]
-
-def base64_url_decode(data):
-    data += '=='[(2 - len(data) * 3) % 4:]
-
-    for search, replace in (('-', '+'), ('_', '/'), (',', '')):
-        data = data.replace(search, replace)
-
-    return base64.b64decode(data)
-
-def str_to_a32(b):
-    if isinstance(b, str): b = makebyte(b)
-    if len(b) % 4: b += b'\0' * (4 - len(b) % 4)
-    return struct.unpack('>%dI' % (len(b) / 4), b)
-
-def base64_to_a32(s):
-    return str_to_a32(base64_url_decode(s))
-
-def mega_download_file(file_handle, file_key, dest_path=None):
-    file_key = base64_to_a32(file_key)
-    file_data = _api_request({'a': 'g', 'g': 1, 'p': file_handle})
-
-    k = (file_key[0] ^ file_key[4], file_key[1] ^ file_key[5], file_key[2] ^ file_key[6], file_key[3] ^ file_key[7])
-    iv = file_key[4:6] + (0, 0)
-
-    if 'g' not in file_data: raise Exception
-
-    file_size = file_data['s']
-    attribs = decrypt_attr(base64_url_decode(file_data['at']), k)
-    input_file = requests.get(file_data['g'], stream=True).raw
-
-    temp_output_file = tempfile.NamedTemporaryFile(mode='w+b', prefix='megapy_', delete=False)
-    k_str = a32_to_str(k)
-    aes = AES.new(k_str, AES.MODE_CTR, counter=Counter.new(128, initial_value=((iv[0] << 32) + iv[1]) << 64))
-
-    mac_str = b'\0' * 16
-    mac_encryptor = AES.new(k_str, AES.MODE_CBC, mac_str)
-    iv_str = a32_to_str([iv[0], iv[1], iv[0], iv[1]])
-
-    for _, chunk_size in get_chunks(file_size):
-        chunk = aes.decrypt(input_file.read(chunk_size))
-        temp_output_file.write(chunk)
-
-        encryptor = AES.new(k_str, AES.MODE_CBC, iv_str)
-
-        for i in range(0, len(chunk) - 16, 16):
-            block = chunk[i:i + 16]
-            encryptor.encrypt(block)
-
-        i = (i + 16) if file_size > 16 else 0
-        block = chunk[i:i + 16]
-        if len(block) % 16: block += b'\0' * (16 - (len(block) % 16))
-
-        mac_str = mac_encryptor.encrypt(encryptor.encrypt(block))
-
-    file_mac = str_to_a32(mac_str)
-    temp_output_file.close()
-
-    if (file_mac[0] ^ file_mac[1], file_mac[2] ^ file_mac[3]) != file_key[6:8]: raise ValueError
-
-    file_path = os.path.join(dest_path, attribs['n'])
-    if os.path.exists(file_path): os.remove(file_path)
-
-    shutil.move(temp_output_file.name, file_path)
-
-def mega_download_url(url, dest_path=None):
-    if '/file/' in url:
-        url = url.replace(' ', '')
-        file_id = re.findall(r'\W\w\w\w\w\w\w\w\w\W', url)[0][1:-1]
-        path = f'{file_id}!{url[re.search(file_id, url).end() + 1:]}'.split('!')
-    elif '!' in url: path = re.findall(r'/#!(.*)', url)[0].split('!')
-    else: raise Exception
-
-    return mega_download_file(path[0], path[1], dest_path)