Sample code for 30+ languages & platforms
PHP

Load a PuTTY Public Key

See more SSH Key Examples

Demonstrates how to load a PuTTY public key.

Chilkat PHP Downloads

Chilkat2 PHP
<?php

use Chilkat2\SshKey;

// Load a PuTTY public key.
$puttyKey = new SshKey();
$pubKeyText = $puttyKey->LoadText('qa_data/ppk/putty_public.pem');

// The pubKeyText contains this content:

//     ---- BEGIN SSH2 PUBLIC KEY ----
//     Comment: "rsa-key-20170126"
//     AAAAB3NzaC1yc2EAAAABJQAAAQEAx+52s7vvaZ8rT2UdFZWlSUVDHDQ+5ZRFvgRW
//     6nm2sO1c9WqNg7u2PQL4jeKSDX2XWcMnpleALz2x8Rr4rMy5E1iZzvWov8VtFd8l
//     fa9HOkgEeJB3VFuYR3NlnD3eyCoYJYPVpHJHrIeui2WZs5vQ76HDe+th8+z5Ald4
//     zPw3p2c6ZJpBrkSBM67hWokoBDi23c7NhszDHhJBrv+B98cQxnagI1PUKqN7E8Vg
//     bNtBI8beIMHyI69up9G1AXSEi0cGIjYNx9RNUPau1mRk/SvfqxgWkAjM005lj7hc
//     bOsjbdKK3T2NtrKTaYjEiXlEXcj1iGuApsD/m73pYaEJB3Nd7w==
//     ---- END SSH2 PUBLIC KEY ----

try {
    $puttyKey->FromRfc4716PublicKey($pubKeyText);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// If desired, convert to other public key formats:
$openSshPubKeyStr = $puttyKey->ToOpenSshPublicKey();
echo $openSshPubKeyStr, "\n";

// openSshPubKeyStr contains:
// ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAQEAx+52s7vvaZ8rT2UdFZWlSUVDHDQ+5ZRFvgRW6nm2sO1c9WqNg7u2PQL4jeKSDX2XWcMnpleALz2x8Rr4rMy5E1iZzvWov8VtFd8lfa9HOkgEeJB3VFuYR3NlnD3eyCoYJYPVpHJHrIeui2WZs5vQ76HDe+th8+z5Ald4zPw3p2c6ZJpBrkSBM67hWokoBDi23c7NhszDHhJBrv+B98cQxnagI1PUKqN7E8VgbNtBI8beIMHyI69up9G1AXSEi0cGIjYNx9RNUPau1mRk/SvfqxgWkAjM005lj7hcbOsjbdKK3T2NtrKTaYjEiXlEXcj1iGuApsD/m73pYaEJB3Nd7w== rsa-key-20170126

// Convert to an XML format:
$xmlPubKeyStr = $puttyKey->ToXml();
echo $xmlPubKeyStr, "\n";

// xmlPubKeyStr contains:
// <RSAPublicKey>
//     <Modulus>x+52s7vvaZ8rT2UdFZWlSUVDHDQ+5ZRFvgRW6nm2sO1c9WqNg7u2PQL4jeKSDX2XWcMnpleALz2x8Rr4rMy5E1iZzvWov8VtFd8lfa9HOkgEeJB3VFuYR3NlnD3eyCoYJYPVpHJHrIeui2WZs5vQ76HDe+th8+z5Ald4zPw3p2c6ZJpBrkSBM67hWokoBDi23c7NhszDHhJBrv+B98cQxnagI1PUKqN7E8VgbNtBI8beIMHyI69up9G1AXSEi0cGIjYNx9RNUPau1mRk/SvfqxgWkAjM005lj7hcbOsjbdKK3T2NtrKTaYjEiXlEXcj1iGuApsD/m73pYaEJB3Nd7w==</Modulus>
//     <Exponent>JQ==</Exponent>
// </RSAPublicKey>
//
//