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ssh2_fingerprint

Retreive fingerprint of remote server (PECL ssh2:0.10-0.9)
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 2350. 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?");
}
?>