code:
#!/usr/bin/env python
# coding: utf-8

from __future__ import unicode_literals

__license__ = 'Public Domain'

import codecs
import io
import os
import random
import sys

from .options import (
    parseOpts,
)
from .compat import (
    compat_getpass,
    compat_shlex_split,
    workaround_optparse_bug9161,
)
from .utils import (
    DateRange,
    decodeOption,
    DEFAULT_OUTTMPL,
    DownloadError,
    expand_path,
    match_filter_func,
    MaxDownloadsReached,
    preferredencoding,
    read_batch_urls,
    SameFileError,
    setproctitle,
    std_headers,
    write_string,
    render_table,
)
from .update import update_self
from .downloader import (
    FileDownloader,
)
from .extractor import gen_extractors, list_extractors
from .extractor.adobepass import MSO_INFO
from .YoutubeDL import YoutubeDL

def _real_main(argv=None):
    # Compatibility fixes for Windows
    if sys.platform == 'win32':
        # https://github.com/ytdl-org/youtube-dl/issues/820
        codecs.register(lambda name: codecs.lookup('utf-8') if name == 'cp65001' else None)

    workaround_optparse_bug9161()

    setproctitle('youtube-dl')

    parser, opts, args = parseOpts(argv)

    # Set user agent
    if opts.user_agent is not None:
        std_headers['User-Agent'] = opts.user_agent

    # Set referer
    if opts.referer is not None:
        std_headers['Referer'] = opts.referer

    # Custom HTTP headers
    if opts.headers is not None:
        for h in opts.headers:
            if ':' not in h:
                parser.error('wrong header formatting, it should be key:value, not "%s"' % h)
            key, value = h.split(':', 1)
            if opts.verbose:
                write_string('[debug] Adding header from command line option %s:%s\n' % (key, value))
            std_headers[key] = value

    # Dump user agent
    if opts.dump_user_agent:
        write_string(std_headers['User-Agent'] + '\n', out=sys.stdout)
        sys.exit(0)

    # Batch file verification
    batch_urls = []
    if opts.batchfile is not None:
        try:
            if opts.batchfile == '-':
                batchfd = sys.stdin
            else:
                batchfd = io.open(
                    expand_path(opts.batchfile),
                    'r', encoding='utf-8', errors='ignore')
            batch_urls = read_batch_urls(batchfd)
            if opts.verbose:
                write_string('[debug] Batch file urls: ' + repr(batch_urls) + '\n')
        except IOError:
            sys.exit('ERROR: batch file %s could not be read' % opts.batchfile)
    all_urls = batch_urls + [url.strip() for url in args]  # batch_urls are already striped in read_batch_urls
    _enc = preferredencoding()
    all_urls = [url.decode(_enc, 'ignore') if isinstance(url, bytes) else url for url in all_urls]

    if opts.list_extractors:
        for ie in list_extractors(opts.age_limit):
            write_string(ie.IE_NAME + (' (CURRENTLY BROKEN)' if not ie._WORKING else '') + '\n', out=sys.stdout)
            matchedUrls = [url for url in all_urls if ie.suitable(url)]
            for mu in matchedUrls:
                write_string('  ' + mu + '\n', out=sys.stdout)
        sys.exit(0)
    if opts.list_extractor_descriptions:
        for ie in list_extractors(opts.age_limit):
            if not ie._WORKING:
                continue
            desc = getattr(ie, 'IE_DESC', ie.IE_NAME)
            if desc is False:
                continue
            if hasattr(ie, 'SEARCH_KEY'):
                _SEARCHES = ('cute kittens', 'slithering pythons', 'falling cat', 'angry poodle', 'purple fish', 'running tortoise', 'sleeping bunny', 'burping cow')
                _COUNTS = ('', '5', '10', 'all')
                desc += ' (Example: "%s%s:%s" )' % (ie.SEARCH_KEY, random.choice(_COUNTS), random.choice(_SEARCHES))
            write_string(desc + '\n', out=sys.stdout)
        sys.exit(0)
    if opts.ap_list_mso:
        table = [[mso_id, mso_info['name']] for mso_id, mso_info in MSO_INFO.items()]
        write_string('Supported TV Providers:\n' + render_table(['mso', 'mso name'], table) + '\n', out=sys.stdout)
        sys.exit(0)

    # Conflicting, missing and erroneous options
    if opts.usenetrc and (opts.username is not None or opts.password is not None):
        parser.error('using .netrc conflicts with giving username/password')
    if opts.password is not None and opts.username is None:
        parser.error('account username missing\n')
    if opts.ap_password is not None and opts.ap_username is None:
        parser.error('TV Provider account username missing\n')
    if opts.outtmpl is not None and (opts.usetitle or opts.autonumber or opts.useid):
        parser.error('using output template conflicts with using title, video ID or auto number')
    if opts.autonumber_size is not None:
        if opts.autonumber_size <= 0:
            parser.error('auto number size must be positive')
    if opts.autonumber_start is not None:
        if opts.autonumber_start < 0:
            parser.error('auto number start must be positive or 0')
    if opts.usetitle and opts.useid:
        parser.error('using title conflicts with using video ID')
    if opts.username is not None and opts.password is None:
        opts.password = compat_getpass('Type account password and press [Return]: ')
    if opts.ap_username is not None and opts.ap_password is None:
        opts.ap_password = compat_getpass('Type TV provider account password and press [Return]: ')
    if opts.ratelimit is not None:
        numeric_limit = FileDownloader.parse_bytes(opts.ratelimit)
        if numeric_limit is None:
            parser.error('invalid rate limit specified')
        opts.ratelimit = numeric_limit
    if opts.min_filesize is not None:
        numeric_limit = FileDownloader.parse_bytes(opts.min_filesize)
        if numeric_limit is None:
            parser.error('invalid min_filesize specified')
        opts.min_filesize = numeric_limit
    if opts.max_filesize is not None:
        numeric_limit = FileDownloader.parse_bytes(opts.max_filesize)
        if numeric_limit is None:
            parser.error('invalid max_filesize specified')
        opts.max_filesize = numeric_limit
    if opts.sleep_interval is not None:
        if opts.sleep_interval < 0:
            parser.error('sleep interval must be positive or 0')
    if opts.max_sleep_interval is not None:
        if opts.max_sleep_interval < 0:
            parser.error('max sleep interval must be positive or 0')
        if opts.sleep_interval is None:
            parser.error('min sleep interval must be specified, use --min-sleep-interval')
        if opts.max_sleep_interval < opts.sleep_interval:
            parser.error('max sleep interval must be greater than or equal to min sleep interval')
    else:
        opts.max_sleep_interval = opts.sleep_interval
    if opts.ap_mso and opts.ap_mso not in MSO_INFO:
        parser.error('Unsupported TV Provider, use --ap-list-mso to get a list of supported TV Providers')

    def parse_retries(retries):
        if retries in ('inf', 'infinite'):
            parsed_retries = float('inf')
        else:
            try:
                parsed_retries = int(retries)
            except (TypeError, ValueError):
                parser.error('invalid retry count specified')
        return parsed_retries
    if opts.retries is not None:
        opts.retries = parse_retries(opts.retries)
    if opts.fragment_retries is not None:
        opts.fragment_retries = parse_retries(opts.fragment_retries)
    if opts.buffersize is not None:
        numeric_buffersize = FileDownloader.parse_bytes(opts.buffersize)
        if numeric_buffersize is None:
            parser.error('invalid buffer size specified')
        opts.buffersize = numeric_buffersize
    if opts.http_chunk_size is not None:
        numeric_chunksize = FileDownloader.parse_bytes(opts.http_chunk_size)
        if not numeric_chunksize:
            parser.error('invalid http chunk size specified')
        opts.http_chunk_size = numeric_chunksize
    if opts.playliststart <= 0:
        raise ValueError('Playlist start must be positive')
    if opts.playlistend not in (-1, None) and opts.playlistend < opts.playliststart:
        raise ValueError('Playlist end must be greater than playlist start')
    if opts.extractaudio:
        if opts.audioformat not in ['best', 'aac', 'flac', 'mp3', 'm4a', 'opus', 'vorbis', 'wav']:
            parser.error('invalid audio format specified')
    if opts.audioquality:
        opts.audioquality = opts.audioquality.strip('k').strip('K')
        if not opts.audioquality.isdigit():
            parser.error('invalid audio quality specified')
    if opts.recodevideo is not None:
        if opts.recodevideo not in ['mp4', 'flv', 'webm', 'ogg', 'mkv', 'avi']:
            parser.error('invalid video recode format specified')
    if opts.convertsubtitles is not None:
        if opts.convertsubtitles not in ['srt', 'vtt', 'ass', 'lrc']:
            parser.error('invalid subtitle format specified')

    if opts.date is not None:
        date = DateRange.day(opts.date)
    else:
        date = DateRange(opts.dateafter, opts.datebefore)

    # Do not download videos when there are audio-only formats
    if opts.extractaudio and not opts.keepvideo and opts.format is None:
        opts.format = 'bestaudio/best'

    # --all-sub automatically sets --write-sub if --write-auto-sub is not given
    # this was the old behaviour if only --all-sub was given.
    if opts.allsubtitles and not opts.writeautomaticsub:
        opts.writesubtitles = True

    outtmpl = ((opts.outtmpl is not None and opts.outtmpl)
               or (opts.format == '-1' and opts.usetitle and '%(title)s-%(id)s-%(format)s.%(ext)s')
               or (opts.format == '-1' and '%(id)s-%(format)s.%(ext)s')
               or (opts.usetitle and opts.autonumber and '%(autonumber)s-%(title)s-%(id)s.%(ext)s')
               or (opts.usetitle and '%(title)s-%(id)s.%(ext)s')
               or (opts.useid and '%(id)s.%(ext)s')
               or (opts.autonumber and '%(autonumber)s-%(id)s.%(ext)s')
               or DEFAULT_OUTTMPL)
    if not os.path.splitext(outtmpl)[1] and opts.extractaudio:
        parser.error('Cannot download a video and extract audio into the same'
                     ' file! Use "{0}.%(ext)s" instead of "{0}" as the output'
                     ' template'.format(outtmpl))

    any_getting = opts.geturl or opts.gettitle or opts.getid or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat or opts.getduration or opts.dumpjson or opts.dump_single_json
    any_printing = opts.print_json
    download_archive_fn = expand_path(opts.download_archive) if opts.download_archive is not None else opts.download_archive

    # PostProcessors
    postprocessors = []
    if opts.metafromtitle:
        postprocessors.append({
            'key': 'MetadataFromTitle',
            'titleformat': opts.metafromtitle
        })
    if opts.extractaudio:
        postprocessors.append({
            'key': 'FFmpegExtractAudio',
            'preferredcodec': opts.audioformat,
            'preferredquality': opts.audioquality,
            'nopostoverwrites': opts.nopostoverwrites,
        })
    if opts.recodevideo:
        postprocessors.append({
            'key': 'FFmpegVideoConvertor',
            'preferedformat': opts.recodevideo,
        })
    # FFmpegMetadataPP should be run after FFmpegVideoConvertorPP and
    # FFmpegExtractAudioPP as containers before conversion may not support
    # metadata (3gp, webm, etc.)
    # And this post-processor should be placed before other metadata
    # manipulating post-processors (FFmpegEmbedSubtitle) to prevent loss of
    # extra metadata. By default ffmpeg preserves metadata applicable for both
    # source and target containers. From this point the container won't change,
    # so metadata can be added here.
    if opts.addmetadata:
        postprocessors.append({'key': 'FFmpegMetadata'})
    if opts.convertsubtitles:
        postprocessors.append({
            'key': 'FFmpegSubtitlesConvertor',
            'format': opts.convertsubtitles,
        })
    if opts.embedsubtitles:
        postprocessors.append({
            'key': 'FFmpegEmbedSubtitle',
        })
    if opts.embedthumbnail:
        already_have_thumbnail = opts.writethumbnail or opts.write_all_thumbnails
        postprocessors.append({
            'key': 'EmbedThumbnail',
            'already_have_thumbnail': already_have_thumbnail
        })
        if not already_have_thumbnail:
            opts.writethumbnail = True
    # XAttrMetadataPP should be run after post-processors that may change file
    # contents
    if opts.xattrs:
        postprocessors.append({'key': 'XAttrMetadata'})
    # Please keep ExecAfterDownload towards the bottom as it allows the user to modify the final file in any way.
    # So if the user is able to remove the file before your postprocessor runs it might cause a few problems.
    if opts.exec_cmd:
        postprocessors.append({
            'key': 'ExecAfterDownload',
            'exec_cmd': opts.exec_cmd,
        })
    external_downloader_args = None
    if opts.external_downloader_args:
        external_downloader_args = compat_shlex_split(opts.external_downloader_args)
    postprocessor_args = None
    if opts.postprocessor_args:
        postprocessor_args = compat_shlex_split(opts.postprocessor_args)
    match_filter = (
        None if opts.match_filter is None
        else match_filter_func(opts.match_filter))

    ydl_opts = {
        'usenetrc': opts.usenetrc,
        'username': opts.username,
        'password': opts.password,
        'twofactor': opts.twofactor,
        'videopassword': opts.videopassword,
        'ap_mso': opts.ap_mso,
        'ap_username': opts.ap_username,
        'ap_password': opts.ap_password,
        'quiet': (opts.quiet or any_getting or any_printing),
        'no_warnings': opts.no_warnings,
        'forceurl': opts.geturl,
        'forcetitle': opts.gettitle,
        'forceid': opts.getid,
        'forcethumbnail': opts.getthumbnail,
        'forcedescription': opts.getdescription,
        'forceduration': opts.getduration,
        'forcefilename': opts.getfilename,
        'forceformat': opts.getformat,
        'forcejson': opts.dumpjson or opts.print_json,
        'dump_single_json': opts.dump_single_json,
        'simulate': opts.simulate or any_getting,
        'skip_download': opts.skip_download,
        'format': opts.format,
        'listformats': opts.listformats,
        'outtmpl': outtmpl,
        'autonumber_size': opts.autonumber_size,
        'autonumber_start': opts.autonumber_start,
        'restrictfilenames': opts.restrictfilenames,
        'ignoreerrors': opts.ignoreerrors,
        'force_generic_extractor': opts.force_generic_extractor,
        'ratelimit': opts.ratelimit,
        'nooverwrites': opts.nooverwrites,
        'retries': opts.retries,
        'fragment_retries': opts.fragment_retries,
        'skip_unavailable_fragments': opts.skip_unavailable_fragments,
        'keep_fragments': opts.keep_fragments,
        'buffersize': opts.buffersize,
        'noresizebuffer': opts.noresizebuffer,
        'http_chunk_size': opts.http_chunk_size,
        'continuedl': opts.continue_dl,
        'noprogress': opts.noprogress,
        'progress_with_newline': opts.progress_with_newline,
        'playliststart': opts.playliststart,
        'playlistend': opts.playlistend,
        'playlistreverse': opts.playlist_reverse,
        'playlistrandom': opts.playlist_random,
        'noplaylist': opts.noplaylist,
        'logtostderr': opts.outtmpl == '-',
        'consoletitle': opts.consoletitle,
        'nopart': opts.nopart,
        'updatetime': opts.updatetime,
        'writedescription': opts.writedescription,
        'writeannotations': opts.writeannotations,
        'writeinfojson': opts.writeinfojson,
        'writethumbnail': opts.writethumbnail,
        'write_all_thumbnails': opts.write_all_thumbnails,
        'writesubtitles': opts.writesubtitles,
        'writeautomaticsub': opts.writeautomaticsub,
        'allsubtitles': opts.allsubtitles,
        'listsubtitles': opts.listsubtitles,
        'subtitlesformat': opts.subtitlesformat,
        'subtitleslangs': opts.subtitleslangs,
        'matchtitle': decodeOption(opts.matchtitle),
        'rejecttitle': decodeOption(opts.rejecttitle),
        'max_downloads': opts.max_downloads,
        'prefer_free_formats': opts.prefer_free_formats,
        'verbose': opts.verbose,
        'dump_intermediate_pages': opts.dump_intermediate_pages,
        'write_pages': opts.write_pages,
        'test': opts.test,
        'keepvideo': opts.keepvideo,
        'min_filesize': opts.min_filesize,
        'max_filesize': opts.max_filesize,
        'min_views': opts.min_views,
        'max_views': opts.max_views,
        'daterange': date,
        'cachedir': opts.cachedir,
        'youtube_print_sig_code': opts.youtube_print_sig_code,
        'age_limit': opts.age_limit,
        'download_archive': download_archive_fn,
        'cookiefile': opts.cookiefile,
        'nocheckcertificate': opts.no_check_certificate,
        'prefer_insecure': opts.prefer_insecure,
        'proxy': opts.proxy,
        'socket_timeout': opts.socket_timeout,
        'bidi_workaround': opts.bidi_workaround,
        'debug_printtraffic': opts.debug_printtraffic,
        'prefer_ffmpeg': opts.prefer_ffmpeg,
        'include_ads': opts.include_ads,
        'default_search': opts.default_search,
        'youtube_include_dash_manifest': opts.youtube_include_dash_manifest,
        'encoding': opts.encoding,
        'extract_flat': opts.extract_flat,
        'mark_watched': opts.mark_watched,
        'merge_output_format': opts.merge_output_format,
        'postprocessors': postprocessors,
        'fixup': opts.fixup,
        'source_address': opts.source_address,
        'call_home': opts.call_home,
        'sleep_interval': opts.sleep_interval,
        'max_sleep_interval': opts.max_sleep_interval,
        'external_downloader': opts.external_downloader,
        'list_thumbnails': opts.list_thumbnails,
        'playlist_items': opts.playlist_items,
        'xattr_set_filesize': opts.xattr_set_filesize,
        'match_filter': match_filter,
        'no_color': opts.no_color,
        'ffmpeg_location': opts.ffmpeg_location,
        'hls_prefer_native': opts.hls_prefer_native,
        'hls_use_mpegts': opts.hls_use_mpegts,
        'external_downloader_args': external_downloader_args,
        'postprocessor_args': postprocessor_args,
        'cn_verification_proxy': opts.cn_verification_proxy,
        'geo_verification_proxy': opts.geo_verification_proxy,
        'config_location': opts.config_location,
        'geo_bypass': opts.geo_bypass,
        'geo_bypass_country': opts.geo_bypass_country,
        'geo_bypass_ip_block': opts.geo_bypass_ip_block,
        # just for deprecation check
        'autonumber': opts.autonumber if opts.autonumber is True else None,
        'usetitle': opts.usetitle if opts.usetitle is True else None,
    }

    with YoutubeDL(ydl_opts) as ydl:
        # Update version
        if opts.update_self:
            update_self(ydl.to_screen, opts.verbose, ydl._opener)

        # Remove cache dir
        if opts.rm_cachedir:
            ydl.cache.remove()

        # Maybe do nothing
        if (len(all_urls) < 1) and (opts.load_info_filename is None):
            if opts.update_self or opts.rm_cachedir:
                sys.exit()

            ydl.warn_if_short_id(sys.argv[1:] if argv is None else argv)
            parser.error(
                'You must provide at least one URL.\n'
                'Type youtube-dl --help to see a list of all options.')

        try:
            if opts.load_info_filename is not None:
                retcode = ydl.download_with_info_file(expand_path(opts.load_info_filename))
            else:
                retcode = ydl.download(all_urls)
        except MaxDownloadsReached:
            ydl.to_screen('--max-download limit reached, aborting.')
            retcode = 101

    sys.exit(retcode)

def main(argv=None):
    try:
        _real_main(argv)
    except DownloadError:
        sys.exit(1)
    except SameFileError:
        sys.exit('ERROR: fixed output name but more than one file to download')
    except KeyboardInterrupt:
        sys.exit('\nERROR: Interrupted by user')

__all__ = ['main', 'YoutubeDL', 'gen_extractors', 'list_extractors']

repo_name: rrosajp/youtube


code:
#!/usr/bin/env python
from __future__ import unicode_literals

# Execute with
# $ python youtube_dl/__main__.py (2.6+)
# $ python -m youtube_dl          (2.7+)

import sys

if __package__ is None and not hasattr(sys, 'frozen'):
    # direct call of __main__.py
    import os.path
    path = os.path.realpath(os.path.abspath(__file__))
    sys.path.insert(0, os.path.dirname(os.path.dirname(path)))

import youtube_dl

if __name__ == '__main__':
    youtube_dl.main()


code:
from __future__ import unicode_literals

from math import ceil

from .compat import compat_b64decode
from .utils import bytes_to_intlist, intlist_to_bytes

BLOCK_SIZE_BYTES = 16

def aes_ctr_decrypt(data, key, counter):
    """
    Decrypt with aes in counter mode

    @param {int[]} data        cipher
    @param {int[]} key         16/24/32-Byte cipher key
    @param {instance} counter  Instance whose next_value function (@returns {int[]}  16-Byte block)
                               returns the next counter block
    @returns {int[]}           decrypted data
    """
    expanded_key = key_expansion(key)
    block_count = int(ceil(float(len(data)) / BLOCK_SIZE_BYTES))

    decrypted_data = []
    for i in range(block_count):
        counter_block = counter.next_value()
        block = data[i * BLOCK_SIZE_BYTES: (i + 1) * BLOCK_SIZE_BYTES]
        block += [0] * (BLOCK_SIZE_BYTES - len(block))

        cipher_counter_block = aes_encrypt(counter_block, expanded_key)
        decrypted_data += xor(block, cipher_counter_block)
    decrypted_data = decrypted_data[:len(data)]

    return decrypted_data

def aes_cbc_decrypt(data, key, iv):
    """
    Decrypt with aes in CBC mode

    @param {int[]} data        cipher
    @param {int[]} key         16/24/32-Byte cipher key
    @param {int[]} iv          16-Byte IV
    @returns {int[]}           decrypted data
    """
    expanded_key = key_expansion(key)
    block_count = int(ceil(float(len(data)) / BLOCK_SIZE_BYTES))

    decrypted_data = []
    previous_cipher_block = iv
    for i in range(block_count):
        block = data[i * BLOCK_SIZE_BYTES: (i + 1) * BLOCK_SIZE_BYTES]
        block += [0] * (BLOCK_SIZE_BYTES - len(block))

        decrypted_block = aes_decrypt(block, expanded_key)
        decrypted_data += xor(decrypted_block, previous_cipher_block)
        previous_cipher_block = block
    decrypted_data = decrypted_data[:len(data)]

    return decrypted_data

def aes_cbc_encrypt(data, key, iv):
    """
    Encrypt with aes in CBC mode. Using PKCS#7 padding

    @param {int[]} data        cleartext
    @param {int[]} key         16/24/32-Byte cipher key
    @param {int[]} iv          16-Byte IV
    @returns {int[]}           encrypted data
    """
    expanded_key = key_expansion(key)
    block_count = int(ceil(float(len(data)) / BLOCK_SIZE_BYTES))

    encrypted_data = []
    previous_cipher_block = iv
    for i in range(block_count):
        block = data[i * BLOCK_SIZE_BYTES: (i + 1) * BLOCK_SIZE_BYTES]
        remaining_length = BLOCK_SIZE_BYTES - len(block)
        block += [remaining_length] * remaining_length
        mixed_block = xor(block, previous_cipher_block)

        encrypted_block = aes_encrypt(mixed_block, expanded_key)
        encrypted_data += encrypted_block

        previous_cipher_block = encrypted_block

    return encrypted_data

def key_expansion(data):
    """
    Generate key schedule

    @param {int[]} data  16/24/32-Byte cipher key
    @returns {int[]}     176/208/240-Byte expanded key
    """
    data = data[:]  # copy
    rcon_iteration = 1
    key_size_bytes = len(data)
    expanded_key_size_bytes = (key_size_bytes // 4 + 7) * BLOCK_SIZE_BYTES

    while len(data) < expanded_key_size_bytes:
        temp = data[-4:]
        temp = key_schedule_core(temp, rcon_iteration)
        rcon_iteration += 1
        data += xor(temp, data[-key_size_bytes: 4 - key_size_bytes])

        for _ in range(3):
            temp = data[-4:]
            data += xor(temp, data[-key_size_bytes: 4 - key_size_bytes])

        if key_size_bytes == 32:
            temp = data[-4:]
            temp = sub_bytes(temp)
            data += xor(temp, data[-key_size_bytes: 4 - key_size_bytes])

        for _ in range(3 if key_size_bytes == 32 else 2 if key_size_bytes == 24 else 0):
            temp = data[-4:]
            data += xor(temp, data[-key_size_bytes: 4 - key_size_bytes])
    data = data[:expanded_key_size_bytes]

    return data

def aes_encrypt(data, expanded_key):
    """
    Encrypt one block with aes

    @param {int[]} data          16-Byte state
    @param {int[]} expanded_key  176/208/240-Byte expanded key
    @returns {int[]}             16-Byte cipher
    """
    rounds = len(expanded_key) // BLOCK_SIZE_BYTES - 1

    data = xor(data, expanded_key[:BLOCK_SIZE_BYTES])
    for i in range(1, rounds + 1):
        data = sub_bytes(data)
        data = shift_rows(data)
        if i != rounds:
            data = mix_columns(data)
        data = xor(data, expanded_key[i * BLOCK_SIZE_BYTES: (i + 1) * BLOCK_SIZE_BYTES])

    return data

def aes_decrypt(data, expanded_key):
    """
    Decrypt one block with aes

    @param {int[]} data          16-Byte cipher
    @param {int[]} expanded_key  176/208/240-Byte expanded key
    @returns {int[]}             16-Byte state
    """
    rounds = len(expanded_key) // BLOCK_SIZE_BYTES - 1

    for i in range(rounds, 0, -1):
        data = xor(data, expanded_key[i * BLOCK_SIZE_BYTES: (i + 1) * BLOCK_SIZE_BYTES])
        if i != rounds:
            data = mix_columns_inv(data)
        data = shift_rows_inv(data)
        data = sub_bytes_inv(data)
    data = xor(data, expanded_key[:BLOCK_SIZE_BYTES])

    return data

def aes_decrypt_text(data, password, key_size_bytes):
    """
    Decrypt text
    - The first 8 Bytes of decoded 'data' are the 8 high Bytes of the counter
    - The cipher key is retrieved by encrypting the first 16 Byte of 'password'
      with the first 'key_size_bytes' Bytes from 'password' (if necessary filled with 0's)
    - Mode of operation is 'counter'

    @param {str} data                    Base64 encoded string
    @param {str,unicode} password        Password (will be encoded with utf-8)
    @param {int} key_size_bytes          Possible values: 16 for 128-Bit, 24 for 192-Bit or 32 for 256-Bit
    @returns {str}                       Decrypted data
    """
    NONCE_LENGTH_BYTES = 8

    data = bytes_to_intlist(compat_b64decode(data))
    password = bytes_to_intlist(password.encode('utf-8'))

    key = password[:key_size_bytes] + [0] * (key_size_bytes - len(password))
    key = aes_encrypt(key[:BLOCK_SIZE_BYTES], key_expansion(key)) * (key_size_bytes // BLOCK_SIZE_BYTES)

    nonce = data[:NONCE_LENGTH_BYTES]
    cipher = data[NONCE_LENGTH_BYTES:]

    class Counter(object):
        __value = nonce + [0] * (BLOCK_SIZE_BYTES - NONCE_LENGTH_BYTES)

        def next_value(self):
            temp = self.__value
            self.__value = inc(self.__value)
            return temp

    decrypted_data = aes_ctr_decrypt(cipher, key, Counter())
    plaintext = intlist_to_bytes(decrypted_data)

    return plaintext

RCON = (0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36)
SBOX = (0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,
        0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,
        0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,
        0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,
        0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,
        0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,
        0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,
        0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
        0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,
        0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,
        0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,
        0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
        0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,
        0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,
        0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,
        0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16)
SBOX_INV = (0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
            0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
            0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
            0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
            0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
            0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
            0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
            0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
            0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
            0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
            0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
            0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
            0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
            0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
            0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
            0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d)
MIX_COLUMN_MATRIX = ((0x2, 0x3, 0x1, 0x1),
                     (0x1, 0x2, 0x3, 0x1),
                     (0x1, 0x1, 0x2, 0x3),
                     (0x3, 0x1, 0x1, 0x2))
MIX_COLUMN_MATRIX_INV = ((0xE, 0xB, 0xD, 0x9),
                         (0x9, 0xE, 0xB, 0xD),
                         (0xD, 0x9, 0xE, 0xB),
                         (0xB, 0xD, 0x9, 0xE))
RIJNDAEL_EXP_TABLE = (0x01, 0x03, 0x05, 0x0F, 0x11, 0x33, 0x55, 0xFF, 0x1A, 0x2E, 0x72, 0x96, 0xA1, 0xF8, 0x13, 0x35,
                      0x5F, 0xE1, 0x38, 0x48, 0xD8, 0x73, 0x95, 0xA4, 0xF7, 0x02, 0x06, 0x0A, 0x1E, 0x22, 0x66, 0xAA,
                      0xE5, 0x34, 0x5C, 0xE4, 0x37, 0x59, 0xEB, 0x26, 0x6A, 0xBE, 0xD9, 0x70, 0x90, 0xAB, 0xE6, 0x31,
                      0x53, 0xF5, 0x04, 0x0C, 0x14, 0x3C, 0x44, 0xCC, 0x4F, 0xD1, 0x68, 0xB8, 0xD3, 0x6E, 0xB2, 0xCD,
                      0x4C, 0xD4, 0x67, 0xA9, 0xE0, 0x3B, 0x4D, 0xD7, 0x62, 0xA6, 0xF1, 0x08, 0x18, 0x28, 0x78, 0x88,
                      0x83, 0x9E, 0xB9, 0xD0, 0x6B, 0xBD, 0xDC, 0x7F, 0x81, 0x98, 0xB3, 0xCE, 0x49, 0xDB, 0x76, 0x9A,
                      0xB5, 0xC4, 0x57, 0xF9, 0x10, 0x30, 0x50, 0xF0, 0x0B, 0x1D, 0x27, 0x69, 0xBB, 0xD6, 0x61, 0xA3,
                      0xFE, 0x19, 0x2B, 0x7D, 0x87, 0x92, 0xAD, 0xEC, 0x2F, 0x71, 0x93, 0xAE, 0xE9, 0x20, 0x60, 0xA0,
                      0xFB, 0x16, 0x3A, 0x4E, 0xD2, 0x6D, 0xB7, 0xC2, 0x5D, 0xE7, 0x32, 0x56, 0xFA, 0x15, 0x3F, 0x41,
                      0xC3, 0x5E, 0xE2, 0x3D, 0x47, 0xC9, 0x40, 0xC0, 0x5B, 0xED, 0x2C, 0x74, 0x9C, 0xBF, 0xDA, 0x75,
                      0x9F, 0xBA, 0xD5, 0x64, 0xAC, 0xEF, 0x2A, 0x7E, 0x82, 0x9D, 0xBC, 0xDF, 0x7A, 0x8E, 0x89, 0x80,
                      0x9B, 0xB6, 0xC1, 0x58, 0xE8, 0x23, 0x65, 0xAF, 0xEA, 0x25, 0x6F, 0xB1, 0xC8, 0x43, 0xC5, 0x54,
                      0xFC, 0x1F, 0x21, 0x63, 0xA5, 0xF4, 0x07, 0x09, 0x1B, 0x2D, 0x77, 0x99, 0xB0, 0xCB, 0x46, 0xCA,
                      0x45, 0xCF, 0x4A, 0xDE, 0x79, 0x8B, 0x86, 0x91, 0xA8, 0xE3, 0x3E, 0x42, 0xC6, 0x51, 0xF3, 0x0E,
                      0x12, 0x36, 0x5A, 0xEE, 0x29, 0x7B, 0x8D, 0x8C, 0x8F, 0x8A, 0x85, 0x94, 0xA7, 0xF2, 0x0D, 0x17,
                      0x39, 0x4B, 0xDD, 0x7C, 0x84, 0x97, 0xA2, 0xFD, 0x1C, 0x24, 0x6C, 0xB4, 0xC7, 0x52, 0xF6, 0x01)
RIJNDAEL_LOG_TABLE = (0x00, 0x00, 0x19, 0x01, 0x32, 0x02, 0x1a, 0xc6, 0x4b, 0xc7, 0x1b, 0x68, 0x33, 0xee, 0xdf, 0x03,
                      0x64, 0x04, 0xe0, 0x0e, 0x34, 0x8d, 0x81, 0xef, 0x4c, 0x71, 0x08, 0xc8, 0xf8, 0x69, 0x1c, 0xc1,
                      0x7d, 0xc2, 0x1d, 0xb5, 0xf9, 0xb9, 0x27, 0x6a, 0x4d, 0xe4, 0xa6, 0x72, 0x9a, 0xc9, 0x09, 0x78,
                      0x65, 0x2f, 0x8a, 0x05, 0x21, 0x0f, 0xe1, 0x24, 0x12, 0xf0, 0x82, 0x45, 0x35, 0x93, 0xda, 0x8e,
                      0x96, 0x8f, 0xdb, 0xbd, 0x36, 0xd0, 0xce, 0x94, 0x13, 0x5c, 0xd2, 0xf1, 0x40, 0x46, 0x83, 0x38,
                      0x66, 0xdd, 0xfd, 0x30, 0xbf, 0x06, 0x8b, 0x62, 0xb3, 0x25, 0xe2, 0x98, 0x22, 0x88, 0x91, 0x10,
                      0x7e, 0x6e, 0x48, 0xc3, 0xa3, 0xb6, 0x1e, 0x42, 0x3a, 0x6b, 0x28, 0x54, 0xfa, 0x85, 0x3d, 0xba,
                      0x2b, 0x79, 0x0a, 0x15, 0x9b, 0x9f, 0x5e, 0xca, 0x4e, 0xd4, 0xac, 0xe5, 0xf3, 0x73, 0xa7, 0x57,
                      0xaf, 0x58, 0xa8, 0x50, 0xf4, 0xea, 0xd6, 0x74, 0x4f, 0xae, 0xe9, 0xd5, 0xe7, 0xe6, 0xad, 0xe8,
                      0x2c, 0xd7, 0x75, 0x7a, 0xeb, 0x16, 0x0b, 0xf5, 0x59, 0xcb, 0x5f, 0xb0, 0x9c, 0xa9, 0x51, 0xa0,
                      0x7f, 0x0c, 0xf6, 0x6f, 0x17, 0xc4, 0x49, 0xec, 0xd8, 0x43, 0x1f, 0x2d, 0xa4, 0x76, 0x7b, 0xb7,
                      0xcc, 0xbb, 0x3e, 0x5a, 0xfb, 0x60, 0xb1, 0x86, 0x3b, 0x52, 0xa1, 0x6c, 0xaa, 0x55, 0x29, 0x9d,
                      0x97, 0xb2, 0x87, 0x90, 0x61, 0xbe, 0xdc, 0xfc, 0xbc, 0x95, 0xcf, 0xcd, 0x37, 0x3f, 0x5b, 0xd1,
                      0x53, 0x39, 0x84, 0x3c, 0x41, 0xa2, 0x6d, 0x47, 0x14, 0x2a, 0x9e, 0x5d, 0x56, 0xf2, 0xd3, 0xab,
                      0x44, 0x11, 0x92, 0xd9, 0x23, 0x20, 0x2e, 0x89, 0xb4, 0x7c, 0xb8, 0x26, 0x77, 0x99, 0xe3, 0xa5,
                      0x67, 0x4a, 0xed, 0xde, 0xc5, 0x31, 0xfe, 0x18, 0x0d, 0x63, 0x8c, 0x80, 0xc0, 0xf7, 0x70, 0x07)

def sub_bytes(data):
    return [SBOX[x] for x in data]

def sub_bytes_inv(data):
    return [SBOX_INV[x] for x in data]

def rotate(data):
    return data[1:] + [data[0]]

def key_schedule_core(data, rcon_iteration):
    data = rotate(data)
    data = sub_bytes(data)
    data[0] = data[0] ^ RCON[rcon_iteration]

    return data

def xor(data1, data2):
    return [x ^ y for x, y in zip(data1, data2)]

def rijndael_mul(a, b):
    if(a == 0 or b == 0):
        return 0
    return RIJNDAEL_EXP_TABLE[(RIJNDAEL_LOG_TABLE[a] + RIJNDAEL_LOG_TABLE[b]) % 0xFF]

def mix_column(data, matrix):
    data_mixed = []
    for row in range(4):
        mixed = 0
        for column in range(4):
            # xor is (+) and (-)
            mixed ^= rijndael_mul(data[column], matrix[row][column])
        data_mixed.append(mixed)
    return data_mixed

def mix_columns(data, matrix=MIX_COLUMN_MATRIX):
    data_mixed = []
    for i in range(4):
        column = data[i * 4: (i + 1) * 4]
        data_mixed += mix_column(column, matrix)
    return data_mixed

def mix_columns_inv(data):
    return mix_columns(data, MIX_COLUMN_MATRIX_INV)

def shift_rows(data):
    data_shifted = []
    for column in range(4):
        for row in range(4):
            data_shifted.append(data[((column + row) & 0b11) * 4 + row])
    return data_shifted

def shift_rows_inv(data):
    data_shifted = []
    for column in range(4):
        for row in range(4):
            data_shifted.append(data[((column - row) & 0b11) * 4 + row])
    return data_shifted

def inc(data):
    data = data[:]  # copy
    for i in range(len(data) - 1, -1, -1):
        if data[i] == 255:
            data[i] = 0
        else:
            data[i] = data[i] + 1
            break
    return data

__all__ = ['aes_encrypt', 'key_expansion', 'aes_ctr_decrypt', 'aes_cbc_decrypt', 'aes_decrypt_text']


code:
from __future__ import unicode_literals

import errno
import io
import json
import os
import re
import shutil
import traceback

from .compat import compat_getenv
from .utils import (
    expand_path,
    write_json_file,
)

class Cache(object):
    def __init__(self, ydl):
        self._ydl = ydl

    def _get_root_dir(self):
        res = self._ydl.params.get('cachedir')
        if res is None:
            cache_root = compat_getenv('XDG_CACHE_HOME', '~/.cache')
            res = os.path.join(cache_root, 'youtube-dl')
        return expand_path(res)

    def _get_cache_fn(self, section, key, dtype):
        assert re.match(r'^[a-zA-Z0-9_.-]+$', section), \
            'invalid section %r' % section
        assert re.match(r'^[a-zA-Z0-9_.-]+$', key), 'invalid key %r' % key
        return os.path.join(
            self._get_root_dir(), section, '%s.%s' % (key, dtype))

    @property
    def enabled(self):
        return self._ydl.params.get('cachedir') is not False

    def store(self, section, key, data, dtype='json'):
        assert dtype in ('json',)

        if not self.enabled:
            return

        fn = self._get_cache_fn(section, key, dtype)
        try:
            try:
                os.makedirs(os.path.dirname(fn))
            except OSError as ose:
                if ose.errno != errno.EEXIST:
                    raise
            write_json_file(data, fn)
        except Exception:
            tb = traceback.format_exc()
            self._ydl.report_warning(
                'Writing cache to %r failed: %s' % (fn, tb))

    def load(self, section, key, dtype='json', default=None):
        assert dtype in ('json',)

        if not self.enabled:
            return default

        cache_fn = self._get_cache_fn(section, key, dtype)
        try:
            try:
                with io.open(cache_fn, 'r', encoding='utf-8') as cachef:
                    return json.load(cachef)
            except ValueError:
                try:
                    file_size = os.path.getsize(cache_fn)
                except (OSError, IOError) as oe:
                    file_size = str(oe)
                self._ydl.report_warning(
                    'Cache retrieval from %s failed (%s)' % (cache_fn, file_size))
        except IOError:
            pass  # No cache available

        return default

    def remove(self):
        if not self.enabled:
            self._ydl.to_screen('Cache is disabled (Did you combine --no-cache-dir and --rm-cache-dir?)')
            return

        cachedir = self._get_root_dir()
        if not any((term in cachedir) for term in ('cache', 'tmp')):
            raise Exception('Not removing directory %s - this does not look like a cache dir' % cachedir)

        self._ydl.to_screen(
            'Removing cache dir %s .' % cachedir, skip_eol=True)
        if os.path.exists(cachedir):
            self._ydl.to_screen('.', skip_eol=True)
            shutil.rmtree(cachedir)
        self._ydl.to_screen('.')