Decrypt file from private key .ppk

Question

I got files from our developer, those files are (private key = file.ppk), (public key = pub.asc), and (encrypted file = file-encrypt.txt.pgp). Person who has created these files has resigned and just give all file above and passphrase. I try to decrypt that file using cleopatra but cleopatra don't know the type of file file.ppk.

How to convert maybe or another choice to decrypt that files?

Solution

These keys belong to different programs:

• file-encrypt.txt.pgp is encrypted using PGP. How to decrypt it depends on its contents (gpg --list-packets might reveal something); you might need just a passphrase, or you might need someone's private PGP key, but I'm 100% sure it has nothing to do with the .ppk file.

• file.ppk is a SSH keypair. It is not a PGP key – it's for logging in to SSH servers only and cannot be used to decrypt anything. ".ppk" means it's in PuTTY format; you can use PuTTYgen to convert it to OpenSSH format for Linux/macOS.

• pub.asc can be several things. It might be a PGP public key (usable for encrypting but not for decrypting), or it might be a PGP-signed piece of text (e.g. a SSH pubkey). Try opening the file with Notepad, decrypting it with Kleopatra, or importing it to Kleopatra.