PGP (Pretty Good Privacy) Cracking
Last modified: 2022-12-20
PGP is an encryption program that provides cryptographic privacy and authentication for data communication.
First off, you need to format the private key to make the John to recognize it.
gpg2john private.key > hash.txt
Crack the passphrase using John the Ripper.
john --wordlist=wordlist.txt hash.txt
Decode Public Key
There are some online tools.