(Ruby) Load an SSH Key from a File (Many Formats Supported)

Demonstrates how to load an SSH public or private key object from a file. The file can be in any of the following formats:

• OpenSSH private key
• OpenSSH public key
• PuTTY private key
• RFC 4716 public key

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

sshkey = Chilkat::CkSshKey.new()

# First, use the LoadText convenience method to load a text file (of any SSH key format)
# into a string:
strKey = sshkey.loadText("../mySshKeys/myKey.txt")

# Next, load the key into the SSH key object.

# If the key is an OpenSSH private key:
# (In actuality, the From* methods will automatically detect the format and load
# the key correctly.  For example, if a PuTTY private key is passed to FromOpenSshPrivateKey,
# it  will still load correctly.)
success = sshkey.FromOpenSshPrivateKey(strKey)
if (success != true)
    print sshkey.lastErrorText() + "\n";
else
    print "Loaded OpenSSH private key." + "\n";
    exit
end

# If the key is an OpenSSH public key:
success = sshkey.FromOpenSshPublicKey(strKey)
if (success != true)
    print sshkey.lastErrorText() + "\n";
else
    print "Loaded OpenSSH public key." + "\n";
    exit
end

# If the key is a PuTTY private key:
success = sshkey.FromPuttyPrivateKey(strKey)
if (success != true)
    print sshkey.lastErrorText() + "\n";
else
    print "Loaded PuTTY private key." + "\n";
    exit
end

# If the key is an RFC 4716 public key:
success = sshkey.FromRfc4716PublicKey(strKey)
if (success != true)
    print sshkey.lastErrorText() + "\n";
else
    print "Loaded RFC 4716 public key." + "\n";
end