数字签名XML文档的部分

数字签名XML文档的部分

本文介绍了数字签名XML文档的部分的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有一个XML文档,其结构类似于以下



 < envelope& 
< header> blaa< / header>
< message> blaa blaa< / message>
< footer>< / footer>
< / envelop>

我要对头部和消息元素进行数字签名并将签名添加到页脚元素。 p>

如何签署元素,然后验证签名(使用.net c#)?

解决方案

您应该能够为签名添加XPath-Transform。应该看起来像这样:

 < Transform Algorithm =http://www.w3.org/TR/1999 / REC-xpath-19991116> 
< XPath xmlns:dsig =& dsig;>
...
< / XPath>
< / Transform>

我不熟悉XPath,但应该很容易制定一个XPath表达式,页脚元素。 (但是请注意,XPath是XML-DSIG的一个可选部分,因此并非所有实现都支持它。)



或者,如果您可以将文档重构为



 < envelope> 
< header> blaa< / header>
< message> blaa blaa< / message>
< Signature>< / Signature>
< / envelop>

 < envelope> 
< signedEnvelope>
< header> blaa< / header>
< message> blaa blaa< / message>
< / signedEnvelope>
< Signature>< / Signature>
< / envelop>

您可以使用包络签名转换(第一种情况)或签署signedEnvelope元素第二种情况)。


I have an XML document having structure similar to the following

<envelop>
    <header>blaa</header>
    <message>blaa blaa</message>
    <footer></footer>
</envelop>

I want to digitally sign the header and message elements and add the signature to the footer element.

How can I sign the elements and then later verify the signature (using .net c#) ?

解决方案

You should be able to add an XPath-Transform to the Signature. It should look something like this:

       <Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
         <XPath xmlns:dsig="&dsig;">
         ...
         </XPath>
       </Transform>

I am not fluent in XPath, but it should be easy to formulate an XPath-expression that excludes the Footer-element. (But note that XPath is an optional part of XML-DSIG, so not all implementations may support it).

Alternatively, if you could restructure your document to be

<envelop>
  <header>blaa</header>
  <message>blaa blaa</message>
  <Signature></Signature>
</envelop>

or

<envelop>
  <signedEnvelope>
    <header>blaa</header>
    <message>blaa blaa</message>
  </signedEnvelope>
  <Signature></Signature>
</envelop>

you could handle it by using an Enveloped Signature Transform (first case) or by signing the signedEnvelope element (second case).

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09-03 12:36