protected function getSignature($method, $url, $params)
{
$signature = false;
/**
* Normalize method.
*/
$method = strtoupper($method);
/**
* Normalize URL.
*
* $urlnormalize = OAuth::urlnormalize($url);
* $url = $urlnormalize['url'];
*/
/**
* Remove `oauth_signature` if present.
* Ref: Spec: 9.1.1 ("The oauth_signature parameter MUST be excluded.")
*/
if (isset($params['oauth_signature'])) {
unset($params['oauth_signature']);
}
/**
* Generate key.
*/
$keyParts = array($this->consumerSecret, $this->tokenSecret ? $this->tokenSecret : '');
$key = implode('&', OAuth::urlencode($keyParts));
switch ($this->signatureMethod) {
case OAuth::SIG_METHOD_HMACSHA1:
$baseParts = array($method, $url, OAuth::paramsBuild($params));
$base = implode('&', OAuth::urlencode($baseParts));
$signature = base64_encode(hash_hmac('sha1', $base, $key, true));
break;
case OAuth::SIG_METHOD_PLAINTEXT:
$signature = $key;
break;
}
if (false === $signature) {
throw new Exception('Can\'t generate signature.');
}
return $signature;
}
