Location: PHPKode > scripts > PayPal Buy Now and IPN Classes > paypal/crypt/EWPServices.php
<?php
/**
 * Copyright 2007 PayPal, Inc. All Rights Reserved.
 */

require_once "PPCrypto.php";

/**
 * API for doing PayPal encryption services.
 */
class EWPServices
{
	/**
	 * Creates a new encrypted button HTML block
	 *
	 * @param	array	The button parameters as key/value pairs
	 * @param	string	The file path to the EWP(merchant) certificate
	 * @param	string	The file path to the EWP(merchant) private key
	 * @param	string	The EWP(merchant) private key password
	 * @param	string	The file path to the PayPal Certificate
	 * @param	string	The URL where button will be posted
	 *
	 * @access public
	 * @static
	 */
	function encryptButton(	$buttonParams_,
							$ewpCertPath_,
							$ewpPrivateKeyPath_,
							$ewpPrivateKeyPwd_,
							$paypalCertPath_,
							$destinationUrl_)
    {
		/**
		 * serialize the button parameters' array to a string.
		 */
		$contentBytes = array();
		foreach ($buttonParams_ as $name => $value) {
			$contentBytes[] = "$name=$value";
		}
        $contentBytes = implode("\n", $contentBytes);


		/**
         * sign and encrypt the button parameters
         */
		$encryptedDataReturn = PPCrypto::signAndEncrypt($contentBytes, $ewpCertPath_, $ewpPrivateKeyPath_, $ewpPrivateKeyPwd_, $paypalCertPath_);
		if(!$encryptedDataReturn["status"]) {
			return false;
		}

		/**
		 * Build and return encrypted blob
		 */
		$encryptedData = "-----BEGIN PKCS7-----".$encryptedDataReturn["encryptedData"]."-----END PKCS7-----";
		return $encryptedData;
	} // encryptButton
} // EWPServices
?>
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