Setting up the Swish Payout API

I described the error below in details. I'm sure the Server administrator can fix this issue in 1~2 hours. I'll pay $100 for this project. [login to view URL] 1. I generated 2 csr files with command. openssl genrsa -out ~/certs/[login to view URL] 4096 openssl req -new -sha256 -key ~/certs/[login to view URL] -out ~/certs/[login to view URL] openssl genrsa -out ~/certs/[login to view URL] 4096 openssl req -new -sha256 -key ~/certs/[login to view URL] -out ~/certs/[login to view URL] 2. I got 2 swish certificates file from swish portal. [login to view URL] [login to view URL] I used one for singing and another for TLS communication between web system and swish platform. 3. I created p12 file from the reference. [login to view URL] openssl pkcs12 -export -out [login to view URL] \ -in [login to view URL] -inkey [login to view URL] 4. I used the following code. [login to view URL] <?php $date = new DateTime(); $dateString = $date->format('Y-m-d\TH:i:s\Z'); $payload = [ "payoutInstructionUUID" => "E4D773858AF5459B96ABCA4B9DBFF94E", "payerPaymentReference" => "Boka", "payerAlias" => "**********", "payeeAlias" => "**********", "payeeSSN" => "***********", "amount" => "1", "currency" => "SEK", "payoutType" => "PAYOUT", "instructionDate" => $dateString, "message" => "Message to the recipient.", "signingCertificateSerialNumber" => "770D93E07DAD96B6A4FBD45E07E1B3D6" ]; $pkey = openssl_pkey_get_private(file_get_contents('[login to view URL]')); $payloadHash = hash('sha512', json_encode($payload)); $signature = openssl_sign($payloadHash, $signature, $pkey, OPENSSL_ALGO_SHA512) ? base64_encode($signature) : null; $request = [ "payload" => $payload, "callbackUrl" => "[login to view URL]", "signature" => $signature ]; print_r($request); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, '[login to view URL]'); curl_setopt($ch, CURLOPT_PORT, 443); curl_setopt($ch, CURLOPT_VERBOSE, true); curl_setopt($ch, CURLOPT_HEADER, 1); curl_setopt($ch, CURLOPT_SSLCERT, '[login to view URL]'); curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'P12'); curl_setopt($ch, CURLOPT_SSLCERTPASSWD, 'haruka'); // curl_setopt($ch, CURLOPT_SSLKEY, '[login to view URL]'); curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:application/json')); // curl_setopt($ch, CURLOPT_CAINFO, '[login to view URL]'); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); curl_setopt($ch, CURLOPT_SSLVERSION, 6); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($request)); $f = tmpfile(); curl_setopt($ch, CURLOPT_STDERR, $f); $results = curl_exec($ch); fseek($f, 0); echo "Verbose information:\n<pre>", fread($f, 32 * 1024), "</pre>\n"; fclose($f); $info =curl_errno($ch)>0 ? array("curl_error_".curl_errno($ch)=>curl_error($ch)) : curl_getinfo($ch); print_r($info); curl_close($ch); ?> 5. I got the following error. * Trying [login to view URL]:443... * Connected to [login to view URL] ([login to view URL]) port 443 (#0) * ALPN, offering h2 * ALPN, offering http/1.1 * SSL connection using TLSv1.3 / TLS_AES_128_GCM_SHA256 * ALPN, server did not agree to a protocol * Server certificate: * subject: C=SE; L=Stockholm; O=GetSwish AB; CN=[login to view URL] * start date: Mar 3 00:00:00 2023 GMT * expire date: Apr 2 23:59:59 2024 GMT * subjectAltName: host "[login to view URL]" matched cert's "[login to view URL]" * issuer: C=US; O=DigiCert Inc; OU=[login to view URL]; CN=GeoTrust RSA CA 2018 * SSL certificate verify result: unable to get local issuer certificate (20), continuing anyway. > POST /swish-cpcapi/api/v1/payouts HTTP/1.1 Host: [login to view URL] Accept: */* Content-Type:application/json Content-Length: 1146 * OpenSSL SSL_read: Connection reset by peer, errno 104 * Closing connection 0 Array ( [curl_error_56] => OpenSSL SSL_read: Connection reset by peer, errno 104 )