PayPal IPN acknowledgements failing with SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure

Question

With no changes on our side and perhaps related to POODLE/SSL3 our PayPal API call to PPIPNMessage::validate is now failing with.

SSL routines:SSL3_READ_BYTE         


        

Answer 1

I have same error while check IPN with PayPal. Here is the solutions of issue

I was worked with PHP 5.3 and PHP 5.3 is no longer support for SSL version 3. I have upgrade with PHP version with 5.4 and added below line of code. It's work for me.

curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
#curl_setopt($ch, CURLOPT_SSLVERSION, 4);
curl_setopt($ch, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1); 
curl_setopt($ch, CURLOPT_SSL_CIPHER_LIST, 'TLSv1');