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<?php /** * Fingerprint Trait for Public Keys * * PHP version 5 * * @author Jim Wigginton <[email protected]> * @copyright 2015 Jim Wigginton * @license http://www.opensource.org/licenses/mit-license.html MIT License * @link http://phpseclib.sourceforge.net */ namespace phpseclib3\Crypt\Common\Traits; use phpseclib3\Crypt\Hash; /** * Fingerprint Trait for Private Keys * * @author Jim Wigginton <[email protected]> */ trait Fingerprint { /** * Returns the public key's fingerprint * * The public key's fingerprint is returned, which is equivalent to running `ssh-keygen -lf rsa.pub`. If there is * no public key currently loaded, false is returned. * Example output (md5): "c1:b1:30:29:d7:b8:de:6c:97:77:10:d7:46:41:63:87" (as specified by RFC 4716) * * @param string $algorithm The hashing algorithm to be used. Valid options are 'md5' and 'sha256'. False is returned * for invalid values. * @return mixed */ public function getFingerprint($algorithm = 'md5') { $type = self::validatePlugin('Keys', 'OpenSSH', 'savePublicKey'); if ($type === false) { return false; } $key = $this->toString('OpenSSH', ['binary' => true]); if ($key === false) { return false; } switch ($algorithm) { case 'sha256': $hash = new Hash('sha256'); $base = base64_encode($hash->hash($key)); return substr($base, 0, strlen($base) - 1); case 'md5': return substr(chunk_split(md5($key), 2, ':'), 0, -1); default: return false; } } }