魔改hls.js增加播放某CTO视频的方法

evlon

0x01, 背景
     许多网站视频，都使用了Aliplayer, 比如某CTO的课程，在会员到期之前把视频下载下来，以后就可以慢慢看了。
0x02, 分析
     目前接触到的视频加密，有2种（孤陋寡闻，莫喷），1) 采用AES算法的ECB模式，对TS加密。 2）采用 AES算法的ECB（16位）对 PES 载荷进行加密。
0x03, 解决方案
     看网上都是分析加密后的js脚本，如 aliplayer-min.js, aliplayer-vod.js, aliplay-hls.js，然后修改。 我采用了不用的方案，直接在 hls.js 开源项目上修改。
0x04, 成果
     支持了两个 m3u8 的 method， 分别是  AES-128-ECB，AES-128-PES。 示例：

1. #EXTM3U
   
2. #EXT-X-VERSION:3
   
3. #EXT-X-ALLOW-CACHE:YES
   
4. #EXT-X-TARGETDURATION:6
   
5. #EXT-X-KEY:METHOD=AES-128-PES,URI="https://some.domain.com/p/3962b56cdd7adf6e96a15583fd35715e61f2f220ceefc0e596705ac6d7284a5e4597e62cf3731560a5ac7595d3d368d5f670e8a60a99b925c24aeb988eb0c3f1"
   
6. #EXT-X-MEDIA-SEQUENCE:0

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0x05，体验
   

1. https://evlon.gitee.io/ctos/#19124

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1. https://github.com/evlon/hls.js

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清闲

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csmm69

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欣冉

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evlon

添加一下脚本到浏览器收藏夹， 然后再播放页面点击一下，填写从开发者工具的网络中抓出来的Cookie。就可以备份视频了。

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