Create a PEM from a PPK file [duplicate]

Question

This question already has an answer here:

• How to convert SSH keypairs generated using PuTTYgen (Windows) into key-pairs used by ssh-agent and Keychain (Linux) 8 answers

So there are plenty of tutorials on how to convert a PEM to a PPK using puttyGen. However my issue is that my windows machine had the only PEM copy and I converted it into a PPK and deleted it. Now I need to figure out how to convert a PPK into a PEM so that my mac can ssh into the server. I still have access to the server so I could also just make a new key if I had to, anyone know how to convert PPK to PEM?

Answer 1

1. Install PuttyTools

   apt-get install putty-tools
   

2. Generate a pem file form the ppk

   puttygen server.ppk -O private-openssh -o server.pem  
   

The file server.pem file will be saved on same location

Answer 2

If you're on a Mac and you've previously installed Homebrew, from Terminal:

$ brew install putty
$ puttygen server.ppk -O private-openssh -o server.pem

The first command was suggested in this comment and the second from Emizen Tech's answer.

Answer 3

Try this to install putty-tools

sudo apt install putty-tools
puttygen key.ppk -O private-openssh -o key.pem
ssh -i ~/key.pem {user}@{ip}

Answer 4

First, install PuTTY for Mac using

brew install putty

Then, use the following command to convert the .ppk format private key to a standard PEM format private key:

puttygen privatekey.ppk -O private-openssh -o privatekey.pem

Make sure permissions on the private key file are set properly. It should only be readable by the user that owns it.

chmod go-rw privatekey.pem

You can now use the key for logins from scripts and command line with:

ssh -i privatekey.pem user@hostname