php man page for ssh2_fingerprint

SSH2_FINGERPRINT(3)							 1						       SSH2_FINGERPRINT(3)

ssh2_fingerprint - Retrieve fingerprint of remote server

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

DESCRIPTION
	Returns a server hostkey hash from an active session.

PARAMETERS
	      o $session
		- An SSH connection link identifier, obtained from a call to ssh2_connect(3).

	      o $flags
		-$flags  may  be  either of SSH2_FINGERPRINT_MD5 or SSH2_FINGERPRINT_SHA1 logically ORed with SSH2_FINGERPRINT_HEX or SSH2_FINGER-
		PRINT_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!
" .
		    "Possible Man-In-The-Middle Attack?");
	      }
	      ?>

PHP Documentation Group 												       SSH2_FINGERPRINT(3)