php ssl生成密钥和证书

<?php/*生成公钥和私钥*/function exportOpenSSLFile(){$opensslConfigPath = "D:/phpStudy/Apache/conf/openssl.cnf";  $config = array(    "digest_alg"    => "sha512",    "private_key_bits" => 4096,           //字节数  512 1024 2048  4096 等    "private_key_type" => OPENSSL_KEYTYPE_RSA,   //加密类型    "config"           => $opensslConfigPath,  );  $res = openssl_pkey_new($config);  if($res == false) return false;  openssl_pkey_export($res, $private_key,null,$config);  $public_key = openssl_pkey_get_details($res);  $public_key = $public_key["key"];  file_put_contents("/cert_public.key",$public_key);  file_put_contents("/cert_private.pem",$private_key);}exportOpenSSLFile();/**生成证书http://wiki.uniformserver.com/index.php/SSL_PHP_Server_Key_and_Certificate_generation**/$opensslConfigPath = "D:/phpStudy/Apache/conf/openssl.cnf";$dn = array(           "countryName" => 'XX', //所在国家名称            "stateOrProvinceName" => 'State', //所在省份名称            "localityName" => 'SomewhereCity', //所在城市名称            "organizationName" => 'MySelf',   //注册人姓名            "organizationalUnitName" => 'Whatever', //组织名称            "commonName" => 'mySelf', //公共名称            "emailAddress" => '[e-mail]' //邮箱        );      $config = array(    "digest_alg"    => "sha512",    "private_key_bits" => 4096,           //字节数  512 1024 2048  4096 等    "private_key_type" => OPENSSL_KEYTYPE_RSA,   //加密类型    "config"           => $opensslConfigPath,  );             $privkeypass = '111111'; //私钥密码        $numberofdays = 365;     //有效时长        $cerpath = "./test.cer"; //生成证书路径        $pfxpath = "./test.pfx"; //密钥文件路径        //生成证书        $privkey = openssl_pkey_new($config);        $csr = openssl_csr_new($dn, $privkey,$config);     // $sscert = openssl_csr_sign($csr, null, $privkey, 365, $config);       $sscert = openssl_csr_sign($csr,null, $privkey, $numberofdays,$config);     openssl_pkey_export_to_file($privkey,"server.key",NULL, $config);    openssl_x509_export_to_file($sscert,"server.crt");    openssl_csr_export_to_file($csr, "server.csr");