mhash() without mhash library?

[Nick Wilson <nick@xxxxxxxxxxxxxxxxxx>]

hi all, 

can anyone tell me if it might be possible to do an mhash() without
actually having the mhash library installed? for various reasons it's
very impracticle to have a compiled version of php running on our
production servers and i'd really like to be able to use the alexa web
services.

here's the php snippet that wont work, just so you know what the aim
is..

function make_sig ( $secret_access_key, $service, $operation, $timestamp)
{
    $sig = $service . $operation . $timestamp;
    $hmac = mhash ( MHASH_SHA1, $sig, $secret_access_key );
    $encoded_hmac = base64_encode ( $hmac );
    return urlencode ( $encoded_hmac );
}

any thoughts?

-- 
Nick Wilson
http://performancing.com/user/1

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