class LingotekOAuthSignatureMethod_HMAC_SHA1 in Lingotek Translation 7.4

Hierarchy

• class \LingotekOAuthSignatureMethod
  • class \LingotekOAuthSignatureMethod_HMAC_SHA1

File

lib/oauth-php/library/signature_method/LingotekOAuthSignatureMethod_HMAC_SHA1.php, line 37

class LingotekOAuthSignatureMethod_HMAC_SHA1 extends LingotekOAuthSignatureMethod {
  public function name() {
    return 'HMAC-SHA1';
  }

  /**
   * Calculate the signature using HMAC-SHA1
   * This function is copyright Andy Smith, 2007.
   *
   * @param LingotekOAuthRequest request
   * @param string base_string
   * @param string consumer_secret
   * @param string token_secret
   * @return string
   */
  function signature($request, $base_string, $consumer_secret, $token_secret) {
    $key = $request
      ->urlencode($consumer_secret) . '&' . $request
      ->urlencode($token_secret);
    if (function_exists('hash_hmac')) {
      $signature = base64_encode(hash_hmac("sha1", $base_string, $key, true));
    }
    else {
      $blocksize = 64;
      $hashfunc = 'sha1';
      if (strlen($key) > $blocksize) {
        $key = pack('H*', $hashfunc($key));
      }
      $key = str_pad($key, $blocksize, chr(0x0));
      $ipad = str_repeat(chr(0x36), $blocksize);
      $opad = str_repeat(chr(0x5c), $blocksize);
      $hmac = pack('H*', $hashfunc(($key ^ $opad) . pack('H*', $hashfunc(($key ^ $ipad) . $base_string))));
      $signature = base64_encode($hmac);
    }
    return $request
      ->urlencode($signature);
  }

  /**
   * Check if the request signature corresponds to the one calculated for the request.
   *
   * @param LingotekOAuthRequest request
   * @param string base_string	data to be signed, usually the base string, can be a request body
   * @param string consumer_secret
   * @param string token_secret
   * @param string signature		from the request, still urlencoded
   * @return string
   */
  public function verify($request, $base_string, $consumer_secret, $token_secret, $signature) {
    $a = $request
      ->urldecode($signature);
    $b = $request
      ->urldecode($this
      ->signature($request, $base_string, $consumer_secret, $token_secret));

    // We have to compare the decoded values
    $valA = base64_decode($a);
    $valB = base64_decode($b);

    // Crude binary comparison
    return rawurlencode($valA) == rawurlencode($valB);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
LingotekOAuthSignatureMethod_HMAC_SHA1::name	public	function	* Return the name of this signature * * Overrides LingotekOAuthSignatureMethod::name
LingotekOAuthSignatureMethod_HMAC_SHA1::signature		function	* Calculate the signature using HMAC-SHA1 * This function is copyright Andy Smith, 2007. * * Overrides LingotekOAuthSignatureMethod::signature
LingotekOAuthSignatureMethod_HMAC_SHA1::verify	public	function	* Check if the request signature corresponds to the one calculated for the request. * * Overrides LingotekOAuthSignatureMethod::verify