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ssh2_fingerprint

(PECL ssh2 >= 0.9.0)

ssh2_fingerprintRetrieve fingerprint of remote server

Description

string ssh2_fingerprint ( resource $session [, int $flags = SSH2_FINGERPRINT_MD5 | SSH2_FINGERPRINT_HEX ] )

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.

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?");
}
?>

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