ssh2_fingerprint
(PECL ssh2 >= 0.9.0)
ssh2_fingerprint — Retrieve fingerprint of remote server
Description
ssh2_fingerprint(resource
$session, int $flags = SSH2_FINGERPRINT_MD5 | SSH2_FINGERPRINT_HEX): stringReturns a server hostkey hash from an active session.
Parameters
-
session -
An SSH connection link identifier, obtained from a call to ssh2_connect().
-
flags -
flagsmay be either ofSSH2_FINGERPRINT_MD5orSSH2_FINGERPRINT_SHA1logically ORed withSSH2_FINGERPRINT_HEXorSSH2_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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