The authentication keys, called ssh keys, are created using the keygen program. Sshkeygen is a tool for creating new authentication key pairs for ssh. If invoked without any arguments, sshkeygen will generate an rsa key. An additional resource record rr, sshfp, is added to a zonefile and the connecting client is able to match the fingerprint with that of the key presented. Here is a fragment of that that covers the ssh key gathering. How to send stdin to ssh command hi masimo, i already tried all options, also the t found it out after the post, but all options result in exactly the same question. In the third component, you are piping the stdout from the echo command to stdin of the sshkeygen.
Ssh introduced public key authentication as a more secure alternative to the older. Different agents and different keys for different projects, with ssh. The ssh keygen utility generates, manages, and converts authentication keys for ssh 1. However, openssh certificates can be very useful for server authentication and can achieve similar benefits as the standard x. It improved security by avoiding the need to have password stored in files, and eliminated the possibility of a compromised server stealing the users password. If the fingerprint is unknown, an alternative method of verification is available.
It can also use ssh to invoke commands on remote hosts. I am trying to call sshkeygen using a variable through bash as an input instead of a file to get a fingerprint of a public key. In this mode sshkeygen will read candidates from standard input or a file. Please start posting anonymously your entry will be published after you log in or create a new account. Specifies the hash algorithm used when displaying key fingerprints. The sshkeygen utility generates, manages, and converts authentication keys for ssh1. If one or more matching principals are found, they are returned on standard output. If invoked without any arguments, sshkeygen will generate an rsa key for use in ssh protocol 2 connections. Pythons subprocess module makes it easy to invoke external commands on localhost.