OpenSSH deprecated use of DSA as it's not considered as secure as the other private key types provided like RSA, ECDSA, ED25519 etc. Start PuTTYgen, and then convert the .pem file to a .ppk file. In this post, part of our “how to manage SSL certificates on Windows and Linux systems” series, we’ll show how to convert an SSL certificate into the most common formats defined on X.509 standards: the PEM format and the PKCS#12 format, also known as PFX.The conversion process will be accomplished through the use of OpenSSL, a free tool available for Linux and Windows platforms. -----end openssh private key----- I would like to convert it to a PEM file format. Previous; Table of contents; Next; Was this page helpful? Traditionally OpenSSH has used the OpenSSL-compatible formats PKCS#1 (for RSA) and SEC1 (for EC) for Private keys. When the header says "BEGIN PRIVATE KEY" (without the "RSA") then it uses PKCS#8, a wrapper format that includes the designation of the key type ("RSA") and the private key itself. If you are using the unix cli tool, run the following command: puttygen my.ppk -O private-openssh -o my.key. Say you have a private key in PEM format, and you want to use that key for SSH into another server, by adding an entry to your ~/.ssh/authorized_keys file with the public key of such PEM file. This means that the private key can be manipulated using the OpenSSL … Windows - convert a .ppk file to a .pem file. For detailed steps, see Convert your private key using PuTTYgen. If it were an RSA key pair, there would be no need for that as an RSA id_rsa key is already in a PEM file format but the ED25519 key pair is an OpenSSH format. You ... You must regenerate your keys in PEM format. Double check if AWS isn't asking for a (X.509) certificate in PEM format, which would be a different thing than your SSH … With puttygen on Linux/BSD/Unix-like. Whereas the OpenSSH public key format is effectively “proprietary” (that is, the format is used only by OpenSSH), the private key is already stored as a PKCS#1 private key. Convert a .ppk private key (Putty) to a base64/pem private key for OpenSSH or OpenSSL. If you need to convert your private and/or public key to an OpenSSH key, you can use PuTTYgen on: Linux: Run these commands as the root user or via sudo: Install: apt install putty-tools. I keep getting errors. Click Save, close the PuTTY Key Generator window and remember the location of the private key file for future use. Obviously I cannot simply use the ASCII string in the ssh-keygen <>.pub key file as it is in SSH file format or I perhaps SubjectPublicKeyInfo structure.. Copy-----BEGIN OPENSSH PRIVATE KEY-----Use -m PEM with ssh-keygen to generate private keys in PEM format: Copy ssh-keygen -t rsa -m PEM. ssh-keygen -f id_rsa -e -m pem This will convert your public key to an OpenSSL compatible format. Choose the .ppk file, and then choose Open. Generate SSH Keys in PEM Format to Connect to a Public or On-Premises sFTP Server. Convert PPK key to OpenSSH format: puttygen ppk_key_id.ppk -O private-openssh -o openssh_rsa_id.key. Appendix: OpenSSH private key format. You are generating a DSA key. I'm having an issue generating a public key that the openssl PEM_read_bio_RSA_PUBKEY() function can consume. Click Load. Your private key is already in PEM format and can be used as is (as Michael Hampton stated). Select your private key that ends in .ppk and then click Open. You can convert your Putty private keys (.ppk) to base64 files for OpenSSH or OpenSSL. 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