SHELL_COMMANDS.md

STEP 1

Generate 128bit HEX KEY from 128bit encryption key file (link in the <file_name>.txt file)

xxd -p <128bit key file name>.key

you are expected to get a 128bit output like this - bf8a8a87d912c8aafa73c4454e14fdda

Example

xxd -p eyJpdiI6InJkUmxORnFIWUVcL0NlSWZMMjBISWlnPT0iLCJ2YWx1ZSI6InFMWll2R2JkNEJ0VHRWSWszR3ZYdGc9PSIsIm1hYyI6IjU0YzliZWJmZDVmMWViYTZiZGUxYjAyNWY1YzE1NzVhN2FjOTNlN2RjMTNkYzM1YWIzYTU5MzM1NjdiODZhZWQifQ==.key

(key file must be downloaded before running this command)

---

STEP 2

Decrypt the downloaded encrypted ts file

openssl aes-128-cbc -d -in <file_name>.ts -out <d_file_name>.ts -nosalt -iv <32bit HEX> -K <32bit KEY HEX>

Example

openssl aes-128-cbc -d -in dynamic_programming.ts -out d_dynamic_programming.ts -nosalt -iv 65e54cc65777504b227afe3964856508 -K bf8a8a87d912c8aafa73c4454e14fdda

---

STEP 3

Convert ts file to mp4 file format (optional, but reduces file size by almost 33%)

ffmpeg -i d_file_name.ts file_name.mp4

Example

ffmpeg -i d_dynamic_programming.ts dynamic_programming.mp4

STEP 4 (Optional but recommanded)

Delete the unnecesary files (delete decrypted ts file only if already converted to mp4 or mkv etc. else you may loose your data)

rm d_dynamic_programming.ts dynamic_programming.ts dynamic_programming.txt

However, if you are downloading sequencial files from the same website, they may use the same encryption credential for every file (i.e. IV and KEY). So you don't need to repeat STEP1 multiple times to obtain the KEY HEX value.