ssh2_fingerprint

(PECL ssh2:0.10-0.9)

ssh2_fingerprint — Retrieve fingerprint of remote server

Description

string ssh2_fingerprint ( resource $session [, int $flags ] )

Returns a server hostkey hash from an active session.

Parameters

session: An SSH connection link identifier, obtained from a call to ssh2_connect().
flags: flags may be either of SSH2_FINGERPRINT_MD5 or SSH2_FINGERPRINT_SHA1 logically ORed with SSH2_FINGERPRINT_HEX or SSH2_FINGERPRINT_RAW. Defaults to SSH2_FINGERPRINT_MD5 | SSH2_FINGERPRINT_HEX.

Return Values

Returns the hostkey hash as a string.

Examples

Example #1 Checking the fingerprint against a known value


<?php

$known_host = '6F89C2F0A719B30CC38ABDF90755F2E4';



$connection = ssh2_connect('shell.example.com', 22);



$fingerprint = ssh2_fingerprint($connection,

               SSH2_FINGERPRINT_MD5 | SSH2_FINGERPRINT_HEX);



if ($fingerprint != $known_host) {

  die("HOSTKEY MISMATCH!\n" .

      "Possible Man-In-The-Middle Attack?");

}

?>