如何在javascript中使用easpi来使用Canonicalized数据

时间：2015-02-02 06:04:08

标签： java esapi

我如何使用Esapi按照veracode的建议对数据进行规范化。

out.print(ESAPI.encoder().encodeForHTML(jsonObj.toJSONString()));

现在在控制台中看到的数据是

{"total":1,"records":5,"rows":[{"id":"RLCP.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"534.7","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"2882","action":"<button class='button-style-s button-alt2' onclick='Buy()&#x3b;'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell()&#x3b;'>Sell<\/button>","rowtoken":"NSE2882","ts":"RLCP.NS","clow":"437.5"}},{"id":"SBI.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"339.8","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"3045","action":"<button class='button-style-s button-alt2' onclick='Buy()&#x3b;'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell()&#x3b;'>Sell<\/button>","rowtoken":"NSE3045","ts":"SBI.NS","clow":"278.1"}},{"id":"YESB.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"948.65","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"11915","action":"<button class='button-style-s button-alt2' onclick='Buy()&#x3b;'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell()&#x3b;'>Sell<\/button>","rowtoken":"NSE11915","ts":"YESB.NS","clow":"776.25"}},{"id":"BOB.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"212.45","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"4668","action":"<button class='button-style-s button-alt2' onclick='Buy()&#x3b;'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell()&#x3b;'>Sell<\/button>","rowtoken":"NSE4668","ts":"BOB.NS","clow":"173.85"}},{"id":"SBNK.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"128.85","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"7179","action":"<button class='button-style-s button-alt2' onclick='Buy()&#x3b;'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell()&#x3b;'>Sell<\/button>","rowtoken":"NSE7179","ts":"SBNK.NS","clow":"105.45"}}]}

但它在html中呈现为

{"total":1,"records":5,"rows":[{"id":"RLCP.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"534.7","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"2882","action":"<button class='button-style-s button-alt2' onclick='Buy();'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell();'>Sell<\/button>","rowtoken":"NSE2882","ts":"RLCP.NS","clow":"437.5"}},{"id":"SBI.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"339.8","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"3045","action":"<button class='button-style-s button-alt2' onclick='Buy();'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell();'>Sell<\/button>","rowtoken":"NSE3045","ts":"SBI.NS","clow":"278.1"}},{"id":"YESB.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"948.65","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"11915","action":"<button class='button-style-s button-alt2' onclick='Buy();'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell();'>Sell<\/button>","rowtoken":"NSE11915","ts":"YESB.NS","clow":"776.25"}},{"id":"BOB.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"212.45","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"4668","action":"<button class='button-style-s button-alt2' onclick='Buy();'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell();'>Sell<\/button>","rowtoken":"NSE4668","ts":"BOB.NS","clow":"173.85"}},{"id":"SBNK.NS","cell":{"ser":"EQ","bdlt":1,"e":"NSE","chigh":"128.85","tick":"0.05","m":1,"prec":2,"W\/L":null,"exch":"nse_cm","tk":"7179","action":"<button class='button-style-s button-alt2' onclick='Buy();'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell();'>Sell<\/button>","rowtoken":"NSE7179","ts":"SBNK.NS","clow":"105.45"}}]}

如图所示，我的javscript无法理解数据并失败。我该怎么做才能解决这个问题。

2 个答案:

答案 0 :(得分：1)

您需要根据打算使用数据的方式转换数据。在这种情况下，您拥有适用于javascript环境的数据，因此您希望ESAPI.encode().escapeForJavaScript()使用指向界面的链接here.

如果您要将要直接呈现的数据发送到页面，那么您使用ESAPI.encode().encodeForHTML()。

尽管如此，即使使用javascript转义也可能无法正常工作，因为您正在尝试对整个 JSON对象进行编码。为了使其正常工作，您需要确保为javscript上下文转义每个单独的数据元素。

例如，编组到此JSON的代码：

       {
        "id": "SBNK.NS",
        "cell": {
            "ser": "EQ",
            "bdlt": 1,
            "e": "NSE",
            "chigh": "128.85",
            "tick": "0.05",
            "m": 1,
            "prec": 2,
            "W\/L": null,
            "exch": "nse_cm",
            "tk": "7179",
            "action": "<button class='button-style-s button-alt2' onclick='Buy();'>Buy<\/button><button class='button-style-s button-alt1' onclick='Sell();'>Sell<\/button>",
            "rowtoken": "NSE7179",
            "ts": "SBNK.NS",
            "clow": "105.45"
        }

假设服务器上有java代码，您可能希望这样做：

public void someControllerMethod(httpReq, httpResp){

     DataObject myData = somthingFromADao.getBean();
     ViewBean vBean = new vBean();

     vBean.setId(encoder.escapeForJavaScript(myData.id));
     Cell myCell = myData.getCell();
     Cell vCell = new vCell();
     vCell.setSer(encode.escapeForJavaScript(myCell.getSer()));
     // ...^^^can be done as a "populate" method or some similar pattern.
     //Marshall as JSON
}

数据集中唯一可能让您感到头痛的事情似乎是＆＃34;行动＆＃34;字段：它显然试图注入要呈现的HTML。 Veracode不会标记它，但你必须确保你也在观察XSS的矢量。这应该重新设计，因此您不必将动态生成的代码作为数据元素传递。目前大多数XSS都是基于DOM的，因此您不希望在浏览器中编写HTML。

答案 1 :(得分：0)

我使用了ESAPI.encode（）。escapeForJavaScript（）我得到了以下结果

\x7B\x22mw0\x22\x3A\x22Default\x22\x7D

现在将其更改为我在代码后面使用的java脚本可以理解的格式。

data="\x7B\x22mw0\x22\x3A\x22Default\x22\x7D"
decodeURIComponent(data.replace(/\\x/g, '%'));

返回

"{"mw0":"Default"}"
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