[vzaar] override AES decryption key URL(closes #17521)

youtube_dl/downloader/hls.py

@@ -64,7 +64,7 @@ class HlsFD(FragmentFD):
         s = urlh.read().decode('utf-8', 'ignore')
 
         if not self.can_download(s, info_dict):
-            if info_dict.get('extra_param_to_segment_url'):
+            if info_dict.get('extra_param_to_segment_url') or info_dict.get('_decryption_key_url'):
                 self.report_error('pycrypto not found. Please install it.')
                 return False
             self.report_warning(
@@ -169,7 +169,7 @@ class HlsFD(FragmentFD):
                     if decrypt_info['METHOD'] == 'AES-128':
                         iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence)
                         decrypt_info['KEY'] = decrypt_info.get('KEY') or self.ydl.urlopen(
-                            self._prepare_url(info_dict, decrypt_info['URI'])).read()
+                            self._prepare_url(info_dict, info_dict.get('_decryption_key_url') or decrypt_info['URI'])).read()
                         frag_content = AES.new(
                             decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content)
                     self._append_fragment(ctx, frag_content)

youtube_dl/extractor/vzaar.py

@@ -87,12 +87,15 @@ class VzaarIE(InfoExtractor):
         usp = video_data.get('usp')
         if video_data.get('uspEnabled') and isinstance(video_guid, compat_str) and isinstance(usp, dict):
             hls_aes = video_data.get('hlsAes')
-            m3u8_url = ('http://fable.vzaar.com/v5/usp%s/%s/%s.ism/.m3u8?'
-                        % ('aes' if hls_aes else '', video_guid, video_id)) + '&'.join(
-                '%s=%s' % (k, v) for k, v in usp.items())
-            formats.extend(self._extract_m3u8_formats(
-                m3u8_url, video_id, 'mp4', 'm3u8' if hls_aes else 'm3u8_native',
-                m3u8_id='hls', fatal=False))
+            qs = '&'.join('%s=%s' % (k, v) for k, v in usp.items())
+            url_templ = 'http://%%s.vzaar.com/v5/usp%s/%s/%s.ism%%s?' % ('aes' if hls_aes else '', video_guid, video_id)
+            m3u8_formats = self._extract_m3u8_formats(
+                url_templ % ('fable', '/.m3u8') + qs, video_id, 'mp4', 'm3u8_native',
+                m3u8_id='hls', fatal=False)
+            if hls_aes:
+                for f in m3u8_formats:
+                    f['_decryption_key_url'] = url_templ % ('goose', '') + qs
+            formats.extend(m3u8_formats)
 
         self._sort_formats(formats)