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authorremitamine <remitamine@gmail.com>2016-01-10 20:09:53 +0100
committerRemita Amine <remitamine@gmail.com>2016-06-19 01:01:40 +0100
commite154c65128305fcaf6c6b2d5fd41ecd83e4ec154 (patch)
tree09b3d7dfa5f9e0d8c2d930c94e7fd2b6d0a0684c /youtube_dl/downloader
parent589568789f500b7a515355a07efec4bcec0f3243 (diff)
[downloader/hls] Add support for AES-128 encrypted segments in hlsnative downloader
Diffstat (limited to 'youtube_dl/downloader')
-rw-r--r--youtube_dl/downloader/hls.py78
1 files changed, 56 insertions, 22 deletions
diff --git a/youtube_dl/downloader/hls.py b/youtube_dl/downloader/hls.py
index 54f2108e9..1d5f178a0 100644
--- a/youtube_dl/downloader/hls.py
+++ b/youtube_dl/downloader/hls.py
@@ -2,14 +2,24 @@ from __future__ import unicode_literals
import os.path
import re
+import binascii
+try:
+ from Crypto.Cipher import AES
+ can_decrypt_frag = True
+except ImportError:
+ can_decrypt_frag = False
from .fragment import FragmentFD
from .external import FFmpegFD
-from ..compat import compat_urlparse
+from ..compat import (
+ compat_urlparse,
+ compat_struct_pack,
+)
from ..utils import (
encodeFilename,
sanitize_open,
+ parse_m3u8_attributes,
)
@@ -21,7 +31,7 @@ class HlsFD(FragmentFD):
@staticmethod
def can_download(manifest):
UNSUPPORTED_FEATURES = (
- r'#EXT-X-KEY:METHOD=(?!NONE)', # encrypted streams [1]
+ r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)', # encrypted streams [1]
r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2]
# Live streams heuristic does not always work (e.g. geo restricted to Germany
@@ -39,7 +49,9 @@ class HlsFD(FragmentFD):
# 3. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.2
# 4. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.5
)
- return all(not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES)
+ check_results = [not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES]
+ check_results.append(not (re.search(r'#EXT-X-KEY:METHOD=AES-128', manifest) and not can_decrypt_frag))
+ return all(check_results)
def real_download(self, filename, info_dict):
man_url = info_dict['url']
@@ -57,36 +69,58 @@ class HlsFD(FragmentFD):
fd.add_progress_hook(ph)
return fd.real_download(filename, info_dict)
- fragment_urls = []
+ total_frags = 0
for line in s.splitlines():
line = line.strip()
if line and not line.startswith('#'):
- segment_url = (
- line
- if re.match(r'^https?://', line)
- else compat_urlparse.urljoin(man_url, line))
- fragment_urls.append(segment_url)
- # We only download the first fragment during the test
- if self.params.get('test', False):
- break
+ total_frags += 1
ctx = {
'filename': filename,
- 'total_frags': len(fragment_urls),
+ 'total_frags': total_frags,
}
self._prepare_and_start_frag_download(ctx)
+ i = 0
+ media_sequence = 0
+ decrypt_info = {'METHOD': 'NONE'}
frags_filenames = []
- for i, frag_url in enumerate(fragment_urls):
- frag_filename = '%s-Frag%d' % (ctx['tmpfilename'], i)
- success = ctx['dl'].download(frag_filename, {'url': frag_url})
- if not success:
- return False
- down, frag_sanitized = sanitize_open(frag_filename, 'rb')
- ctx['dest_stream'].write(down.read())
- down.close()
- frags_filenames.append(frag_sanitized)
+ for line in s.splitlines():
+ line = line.strip()
+ if line:
+ if not line.startswith('#'):
+ frag_url = (
+ line
+ if re.match(r'^https?://', line)
+ else compat_urlparse.urljoin(man_url, line))
+ frag_filename = '%s-Frag%d' % (ctx['tmpfilename'], i)
+ success = ctx['dl'].download(frag_filename, {'url': frag_url})
+ if not success:
+ return False
+ down, frag_sanitized = sanitize_open(frag_filename, 'rb')
+ frag_content = down.read()
+ down.close()
+ if decrypt_info['METHOD'] == 'AES-128':
+ iv = decrypt_info.get('IV') or compat_struct_pack(">8xq", media_sequence)
+ frag_content = AES.new(decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content)
+ ctx['dest_stream'].write(frag_content)
+ frags_filenames.append(frag_sanitized)
+ # We only download the first fragment during the test
+ if self.params.get('test', False):
+ break
+ i += 1
+ media_sequence += 1
+ elif line.startswith('#EXT-X-KEY'):
+ decrypt_info = parse_m3u8_attributes(line[11:])
+ if decrypt_info['METHOD'] == 'AES-128':
+ if 'IV' in decrypt_info:
+ decrypt_info['IV'] = binascii.unhexlify(decrypt_info['IV'][2:])
+ if not re.match(r'^https?://', decrypt_info['URI']):
+ decrypt_info['URI'] = compat_urlparse.urljoin(man_url, decrypt_info['URI'])
+ decrypt_info['KEY'] = self.ydl.urlopen(decrypt_info['URI']).read()
+ elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
+ media_sequence = int(line[22:])
self._finish_frag_download(ctx)