Fix openssl_x509_checkpurpose_basic.phpt

This test fails because san-cert.pem and san-ca.pem have expired.  We
fix that by using the CertificateGenerator to generate temporary certs
during the test run.  Since san-cert.pem and san-ca.pem have been
identical, we only generate one certificate.

Closes GH-7763.

ext/openssl/tests/openssl_x509_checkpurpose_basic.phpt

@@ -8,10 +8,14 @@ if (OPENSSL_VERSION_NUMBER < 0x10000000) die("skip Output requires OpenSSL 1.0")
 ?>
 --FILE--
 <?php
+include 'CertificateGenerator.inc';
+$certificateGenerator = new CertificateGenerator();
+$certificateGenerator->saveCaCert(__DIR__ . "/san-cert.pem");
+
 $cert = "file://" . __DIR__ . "/cert.crt";
 $bert = "file://" . __DIR__ . "/bug41033.pem";
 $sert = "file://" . __DIR__ . "/san-cert.pem";
-$cpca = __DIR__ . "/san-ca.pem";
+$cpca = __DIR__ . "/san-cert.pem";
 $utfl = __DIR__ . "/sni_server_uk.pem";
 $rcrt = openssl_x509_read($cert);
 
@@ -84,6 +88,10 @@ var_dump(openssl_x509_checkpurpose($sert, X509_PURPOSE_SMIME_ENCRYPT, array($cpc
 var_dump(openssl_x509_checkpurpose($sert, X509_PURPOSE_CRL_SIGN, array($cpca), $utfl));
 var_dump(openssl_x509_checkpurpose($sert, X509_PURPOSE_ANY, array($cpca), $utfl));
 ?>
+--CLEAN--
+<?php
+@unlink(__DIR__ . "/san-cert.pem");
+?>
 --EXPECT--
 bool(false)
 bool(false)