WSO2 WS安全密码仅在没有证书的情况下可用

我们想要创建一个使用WS-Security但没有签名和加密的PHP WSO2 Web服务客户端。相反，我们想要使用一个简单的密码。问题是：我们总是收到一个证书错误（见下文）。我们真的必须安装证书吗？如果必须，在哪里？Java密钥库？

环境：PHP 5.3.10、WSO2 PHP 2.10、Apache 2.2.x

wfs_client_log:

[error]key_mgr.c（295）[rampart][rampart_signature]未指定公钥证书文件。[error]rampart_signature.c（856）[rampart][rampart_ssignature]无法获取证书[error]rampart_sec_header_builder.c（131）[rampart][shb]签名失败。错误[error]rampart_sec_header_builder.c（601）[rampart][shb]不对称绑定失败[error]rampart_out_handler.c（130）[rampart]安全标头构建失败。[error]阶段.c（224）处理程序RampartOutHandler调用在阶段Security内失败[error]engine.c（657）调用阶段安全性失败

PHP代码是：

  <?php
    // Endpoint WebService
    $endPoint       = 'http://xxx.xxxx.xxx:7000/orabpel/selfservice/passwortAendernMBE/1.0';
    // Security-Payload
    $user           = 'mustermann123';
    $passwortAlt    = 'foo';
    $passwortNeu    = 'bar';
    // create Security-Token 
    $secToken       = new WSSecurityToken(array(
                                                    "user" => $user,
                                                    "password" => $passwortAlt,
                                                    "passwordType" => "PlainText"));
    // create SecurityPolicy 
    $policy         = new WSPolicy(array(
                                                    "security" => array(
                                                            "useUsernameToken" => TRUE)));
    // create WS-Client 
    $client         = new WSClient( array(
                                                    "to" => $endPoint,
                                                    "useSOAP" => "1.1",
                                                    "action" => "process",
                                                    "policy" => $policy,
                                                    "securityToken" => $secToken));
    // create SOAP-Payload
    $soapPayload = '
            <ns1:passwortAendern_processElement xmlns:ns1="http://xxxx.xxxx.xxxxxe/Integration/prozesse/xxxxxxSchema"
            xmlns:ns2="http://xxxx.xxxx.xxx/types/xx.xxx.xxxx.selfService.prozesse.xxx.xxxxMessage">
                    <ns1:passwortAendernMessage>
                            <ns2:benutzerkennung>' . $user . '</ns2:benutzerkennung>
                            <ns2:passwortAlt>' . $passwortAlt . '</ns2:passwortAlt>
                            <ns2:passwortNeu>' . $passwortNeu . '</ns2:passwortNeu>
                    </ns1:passwortAendernMessage>
            </ns1:passwortAendern_processElement>';
    // Request
    $soapResponse = null;
    try {
            // soap Request 
            $soapResponse   = $client->request( $soapPayload );
            // print out Response
            echo '<pre>';
            print_r(htmlspecialchars( str_replace('>','>'.PHP_EOL,$soapResponse->str ) ));
            echo '</pre>';
    } catch(Exception $e) {
            echo '<h1>Error:</h1>' . PHP_EOL;
            var_dump($e);
    }
// dump Soap-Parameters
echo '<h1>Soap-Parameter</h1>' . PHP_EOL;
var_dump($soapPayload);
// dump Soap-Response
echo '<h1>Soap-Response</h1>' . PHP_EOL;
var_dump($soapResponse);