This option allows importing keys from several commercial SSH implementations. ssh-keygen -y -f /path/ to/ssh_key The -y option "will read a private OpenSSH format file and print an OpenSSH public key to stdout". ssh-keygen also reads the RFC 4716 SSH Public Key File Format. The key files are stored in the ~/.ssh directory unless specified otherwise with the --ssh-dest-key … When I tried to connect to a repository using a key pair generated with. The PuTTY keygen tool offers several other algorithms – DSA, ECDSA, Ed25519, and SSH-1 (RSA).. You can also add custom comment to your private key for more identification. Now, however, OpenSSH has its own private key format (no idea why), and can be compiled with or without support for standard key formats. PuTTYgen is an key generator for creating SSH keys for PuTTY. In the PuTTY Key Generator window, click … ----BEGIN RSA PRIVATE KEY----- The work around is to specify the format to the old PEM when generating the keys: ssh-keygen -m PEM -t rsa -b 4096 . For RSA and DSA keys ssh-keygen tries to find the 5. By default the keys generated by ssh-keygen will be used by the OpenSSH implementation. If the private key is password protected, ssh-keygen will ask for the password. ssh-keygen -t rsa -b 4096 In addition, PuTTYgen can also be used to convert keys to and from other formats. The new format isn't currently compatible in the Access keys of a Bitbucket repository. The process outlined below will generate RSA keys, a classic and widely-used type of encryption algorithm. They are supposed to be the same, however one works for authentication and the other one doesn't. ssh-keygen -m PEM -t rsa -b 4096 If you use the Azure CLI to create your VM with the az vm create command, you can optionally generate SSH public and private key files using the --generate-ssh-keys option. However this is an OpenSSH-format private key and needs to be converted to Putty's own format to use in Putty. If you generate a key with OpenSSH using ssh-keygen with the default options, it will work with virtually every server out there. -l' Show fingerprint of specified public key file. The -f option specifies the path to the private key. I have two private ssh keys, - one was originally created with ssh-keygen the other one with a python script. Your options are: Use this key with command-line SSH (it's in the correct format). Java SSH and the new OpenSSH Private Key Format Posted on October 4, 2019 by Lee David Painter With the release of OpenSSH 7.8, the default private key format for private keys generated from ssh-keygen has changed from OpenSSL compatible PEM files to a custom key format created by the OpenSSH developers. You can either specify the file on the command line e.g. Private RSA1 keys are also supported. The format information (OpenSSH/PuTTy and private/public) PuTTy uses .ppk for private keys and the ssh-keygen tool comes with .pub for public keys here, which I don't want to use because of MS Publisher. PuTTYgen is comparable in certain respects to the ssh-keygen tool. You've used ssh-keygen to create a private key file called id_rsa.ppk. If you require a different encryption algorithm, select the desired option under the Parameters heading before generating the key pair.. 1. Convert SSH keys to Different Format. On Windows PuTTYGen is a graphical tool. If PuTTY and OpenSSH differ, PuTTY is the one that's incompatible. OpenSSH is the de facto standard implementation of the SSH protocol. PuTTYgen can be used to create public and private key pairs (in .ppk file format). It's a very natural assumption that because SSH public keys (ending in .pub ) are their own special format that the private keys (which don't end in .pem as we'd expect) have their own special format too. But, if you want to convert those keys to SSH comercial implementations (for example: SSH2), use the -e option as shown below.