(PHP Extension) 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 PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

$sshkey = new CkSshKey();

// 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;
}

// 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;
}

// 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;
}

// 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";
}


?>