SHA-512与AES-CBC共加密的,如何解密?

煤球

AI 给的解法

根据您提供的链接和返回的JSON数据，我来为您解析这个qAAB格式的加密逻辑，并说明在易语言中如何实现。

核心解密逻辑分析

您提供的链接中，key_seed参数与JSON响应体顶层的key_seed字段值相同，均为 quBf94c5gV0FuWEjssrbSAA9QZgE1BKpadpXYNOvOXQ=。

JSON中main_url和backup_url_1的值均以qAAB开头，这确实是一种自定义的加密格式。根据您之前提到的信息，其解密流程是确定的：

• 密钥派生：使用key_seed进行SHA-512哈希运算，得到一个64字节的散列值。
• 提取Key和IV：从SHA-512结果中提取AES-CBC所需的密钥和初始化向量（IV）。根据常见的实现模式，很可能是取前32字节作为AES-256密钥，接下来的16字节作为IV。
• Base64解码：将qAAB开头之后的部分（即去掉qAAB前缀）进行标准Base64解码，得到密文数据。
• AES-CBC解密：使用上一步得到的Key和IV，对密文进行AES-CBC模式解密（通常使用PKCS#7填充）。
• 获取真实URL：解密后的明文数据即为真实的CDN视频地址。
  
  易语言好像没有 SHA-512 是不是需要DLL 或者PY吗?
  
  下面 是 json 的原内容, 谁会这2个解密,帮忙, 验证一下 AI 说的是不是正确的,能不能 得到 真实URL
  
  

{"video_info":{"data":{"status":10,"message":"success","enable_ssl":true,"auto_definition":"360p","enable_adaptive":false,"video_id":"v0369cg10004d9ctu327dld73tride70","video_duration":10.08,"media_type":"video","url_expire":1784279113,"video_list":{"video_1":{"definition":"720p","quality":"normal","vtype":"mp4","vwidth":720,"vheight":1280,"bitrate":2479230,"real_bitrate":2479230,"fps":24,"float_fps":24,"codec_type":"h264","size":3123831,"main_url":"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","backup_url_1":"qAABANzeJ7ZGrgob91G43Yt/LwuH0ktPAxjKuP1LaDhO47E+ZKfJ/m8I4GFkEDZLCChM+r8589cPdgScJVCm5yHv6g1mt4i3siHJDxcE0igpIDXxPbXoJ/Tr/1ibPh72wiRZdZ3cXZHivLLX4PP2CP3v3kDaDJtIhB85fkfu019iaeh6U+429MpCr20n1GirxzQWJpPnYNZxfSoQnkhNmTLd0jF344hHD3eN2WBqCoPO/P5ZLYP+YCDYThDklB9KoTBtl3hps6shwtVfP3o5EKL9GmC/lh+kTy0v/IkCkIi1JpXQuRV42YCGF2Kyb9wzkwgZbtozqAIg+nVCKR5y7Okme90w3nJeTTso0AjUTTJ63yo+ysTmb2YpT8u+65UNL8f4UyBrSFsm5jeXVC6nAUdbXVfAkFwCygbk14w0HqR9Xm9K/4g4uGD7J4moId/iacDLEpe0DXl4FIS9nXQGO/GsYYvBS1I7I5MPoj0e9edpUEiaY8COItLh1XXDdGPcz5Y4krHFDwVUP8S8fKX5M9Bq76QOtqQvpxjgRcmQPwAxLsUHqSC6eHE2NB73AcSPb4LGhJ47ZPqsVi+YbCxVzv+fRUWCDfP8FksVTcEURPviM2oLehHSMon9hVk6tOle0FPHbB3tGngmaYiKSuznvriVNKfA5bYLki7r6ciauLSHPZFUu1PKSSlLU14BOyM2fS1v0/4GM1dVRmJbFRkk2v2Ei9j48oui8NYLm9swVbsFUcKO","file_id":"5598103e747d4c1fbefce5d76023d719","quality_type":10,"encryption_method":"","audio_channels":"2.0","audio_layout":"L R","feature_id":"e38567d78da7ae34faf3833d9e13c66f","audio_profile":"aac_lc","gear_des_key":"0:MP4|1:normal|2:h264|3:video_gen_watermark_dyn|4:720p|5:normal|10000:105","audio_sample_rate":"44100","audio_bitrate_target":128,"logo_type":"video_gen_watermark_dyn","url_expire":1784279113,"user_video_proxy":1,"socket_buffer":55782540,"preload_size":327680,"preload_interval":60,"preload_min_step":5,"preload_max_step":10,"file_hash":"b98744740799fc3aabff01535def8ce3","p2p_verify_url":"","check_info":"c:0-9097-e66c|d:0-1561914-a642,1561915-3123830-6bc0","encrypt":false,"spade_a":"","kid":"","barrage_mask_url":"","barrage_mask_offset":""},"video_2":{"definition":"1080p","quality":"normal","vtype":"mp4","vwidth":720,"vheight":1280,"bitrate":1425786,"real_bitrate":1425786,"fps":24,"float_fps":24,"codec_type":"bytevc1","size":1796491,"main_url":"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","backup_url_1":"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","file_id":"bbd4bcb758014da2b53e281bb16ddf0a","quality_type":1,"encryption_method":"","audio_channels":"2.0","audio_layout":"L R","feature_id":"069767e0b4f5d9d87fcf68b96cd224a7","audio_profile":"aac_lc","gear_des_key":"0:MP4|1:normal|2:h265_hvc1|3:video_gen_watermark_dyn|4:1080p|5:normal|10000:105","audio_sample_rate":"44100","audio_bitrate_target":128,"logo_type":"video_gen_watermark_dyn","url_expire":1784279113,"user_video_proxy":1,"socket_buffer":32080140,"preload_size":327680,"preload_interval":60,"preload_min_step":5,"preload_max_step":10,"file_hash":"cc6cd33f8401d45da75aa86363e3b824","p2p_verify_url":"","check_info":"c:0-9556-62e1|d:0-898244-b0ff,898245-1796490-d286","encrypt":false,"spade_a":"","kid":"","barrage_mask_url":"","barrage_mask_offset":""}},"popularity_level":0,"has_embedded_subtitle":false,"user_id":"","validate":"","poster_url":"https://p9-sign.douyinpic.com/tos-cn-p-9ecd54/oUE83ODhLAgWcdOEAImRnkI1uHfQw1u3t04Zdl~tplv-noop.image?dy_q=1784275503\u0026l=202607171605034A01E93C4458B3F75C8B\u0026x-expires=1784279113\u0026x-signature=aOjnxMTx2ZPtKYnaFXDcHBGNuuw%3D","key_seed":"quBf94c5gV0FuWEjssrbSAA9QZgE1BKpadpXYNOvOXQ=","optimal_decoding_mode":""},"message":"success","code":0,"total":2},"message":"success","code":0}

a2083657

SHA-512易语言自带不支持，手动实现或用现成DLL（比如openssl）。AES-CBC同样。写个易语言步骤：

1. 取key_seed值，base64解码得到32字节。
2. 对这32字节做SHA-512（用精易模块或自己写），得到64字节。
3. 取前32字节为AES密钥，第33-48字节为IV（共16字节）。
4. 去掉main_url的“qAAB”前缀，剩余部分base64解码得密文。
5. AES-CBC解密（PKCS7填充，可用精易模块的“对称加密”命令，算法选#AES_256_CBC，填充方式选#填充方式_PKCS7）。

例子伪代码：
.版本 2
.局部变量 key_seed, 字节集
.局部变量 sha512结果, 字节集
.局部变量 aes密钥, 字节集
.局部变量 iv, 字节集
.局部变量 密文, 字节集
.局部变量 明文, 字节集

key_seed ＝ 编码_BASE64解码 (“quBf94c5gV0FuWEjssrbSAA9QZgE1BKpadpXYNOvOXQ=”)
sha512结果 ＝ 校验_SHA512 (key_seed)  ’ 需自备SHA512函数，精易模块无此命令，可用HASH模块或自己实现
aes密钥 ＝ 取字节集中间 (sha512结果, 1, 32)
iv ＝ 取字节集中间 (sha512结果, 33, 16)
密文 ＝ 编码_BASE64解码 (子文本替换 (main_url, “qAAB”, “”, , , 真))
明文 ＝ 对称解密 (密文, aes密钥, iv, #算法_AES_256_CBC, #数据填充_PKCS7)

如果精易模块没SHA512，自己手写：网上一搜很多易语言源码，或调用“shasum.dll”等。不想折腾直接抄现成代码，几分钟搞定。

石榴熟了

AI一本正经的胡扯八道