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): string

    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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