/**
* Sign a base string using the given algoritm (if supported, generate notice otherwise)
* @param $algo
* @param $string_to_sign
* @param $consumer_secret
* @param $token_secret
* @return string signiture for the given parms
*/
public static function sign_base_string($algo, $string_to_sign, $consumer_secret, $token_secret)
{
$algo = strtoupper($algo);
$key = SPUtils::join_encoded3896($consumer_secret, $token_secret);
if ($algo == "HMAC-SHA1") {
return base64_encode(hash_hmac("sha1", $string_to_sign, $key, true));
} else {
if ($algo == "PLAINTEXT") {
return SPOAuthClient::rfc3986_encode($key);
} else {
trigger_error("{$algo} signature method not supported");
}
}
}
