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# ssh2_fingerprint

(PECL)

ssh2_fingerprint -- Retreive fingerprint of remote server

## Description

string ssh2_fingerprint ( resource session [, int flags] )

Returns a server hostkey hash from an active session. Defaults to MD5 fingerprint encoded as ASCII hex values.

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`.

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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