We've seen PS4 Envelope Files in Logs, the Decrypted sl-config.xml.env with Event Log Servers, some PS4 Envelope File Documentation earlier this week and today PlayStation 4 scene developer @SocraticBliss shared on Github via Twitter with help from IDC and zecoxao a ps4_env_decryptor.py Python 2 script PS4 Env Decryptor tool used to delve into the PS4's filesystem. 
Download: ps4_env_decryptor.py / ps4_env_decryptor-master.zip / GIT
Here's some additional details from the ps4_env_decryptor README.md, to quote: PS4 Env Decryptor
SocraticBliss (R)
Special Thanks to IDC for finding the Buffers/IV/Flag and implementation suggestions
... Oh and I guess Zecoxao as well
This tool is for decrypting .env files that are found on the PS4 filesystem.
Instructions
Download: ps4_env_decryptor.py / ps4_env_decryptor-master.zip / GIT
Here's some additional details from the ps4_env_decryptor README.md, to quote: PS4 Env Decryptor
SocraticBliss (R)
Special Thanks to IDC for finding the Buffers/IV/Flag and implementation suggestions
... Oh and I guess Zecoxao as well
This tool is for decrypting .env files that are found on the PS4 filesystem.
Instructions
- Obtain the PS4 Envelope Keys and overwrite the 0's in the python script.
- Find an encrypted .env file from an extracted PUP and run the script!
Code:
python ps4_env_decryptor.py [file]
