How to generate DigestValue and SignatureValue to envelope XML signature using PHP / linux tool

Question

I tried to find some examples of how to create DigestValue and SignatureValue signatures for XML (WSDL).

The following is an example SOAP for an application:

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:SOAP-SEC="http://schemas.xmlsoap.org/soap/security/2000-12" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Header>
<SOAP-SEC:Signature soapenv:actor="" soapenv:mustUnderstand="0">
<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<ds:SignedInfo>
<ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
<ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
<ds:Reference URI="#Body">
<ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
<ds:DigestValue></ds:DigestValue>
</ds:Reference>
</ds:SignedInfo>
<ds:SignatureValue></ds:SignatureValue>
</ds:Signature>
</SOAP-SEC:Signature>
</soapenv:Header>
<soapenv:Body Id="Body">
<SomeApplicationMethod soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<Application href="#id0"/></SomeApplicationMethod>
<multiRef id="id0" soapenc:root="0" soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ns1="urn:NCDServices" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xsi:type="ns1:SomeApplicationMethod">
<param2 xsi:type="soapenc:string">123456</param2>
<param3 xsi:type="soapenc:string">someString</param3>
<param4 xsi:type="soapenc:string">string123 bla bla</param4>
<param5 xsi:type="soapenc:string">0</param5>
</multiRef>
</soapenv:Body>
</soapenv:Envelope> 

I have one example from the application provider, and I cannot create the same DigestValue and SignatureValue as the sample. According to the application documentation, I need to create digestValue from the entire Body section.

I know that I need cannonicalize, sha1 and then base64encode. But how to make cannonicalize body parts? (sha1 and base64 encoding is simple enough to understand).

First I want to try creating a var string:

$whole_body = '<soapenv:Body Id="Body"> ........stuff inside...... </soapenv:Body>';

, PHP c14n ( , var, PHP 5.2 , , 5.2.6).

xmlseclibs.php , , DOMelement C14N. , DOMelement.

xmlseclibs.php XML, , , , " " .

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Answer 1

<?php 

$dom = new DOMDocument();  
$dom->loadXML($yourXML); // the XML you specified above.  

$canonicalized = $dom->C14N(); // for the whole document  

// .. or:  
$tag = $dom->getElementById("yourID"); // give it an ID, or use getElementsByTagName with ->item(0) or something  
$canonicalized = $tag->C14N();  

// $canonicalized is the canonicalized form of the XML   
// So, The DigestValue is just:  
$digest = base64_encode(pack("H*", sha1($canonicalized)));  
?>  

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XML-DSIG , , ...:(

Answer 2

.. .

xmlseclibs . http://code.google.com/p/xmlseclibs/

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