java - XML Signature Validation -


i have problem can't figure out how solve. application receives (supposedly) signed xml , have validate if right. here's signature part of receive in xml

<signature xmlns="http://www.w3.org/2000/09/xmldsig#">         <signedinfo>             <canonicalizationmethod algorithm="http://www.w3.org/tr/2001/rec-xml-c14n-20010315" />             <signaturemethod algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />             <reference uri="35121103220612000188550010000000131000009300">                 <transforms>                     <transform algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />                     <transform algorithm="http://www.w3.org/tr/2001/rec-xml-c14n-20010315" />                 </transforms>                 <digestmethod algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />                 <digestvalue>ulz/66r6oonlpj5v4cisrv5zmyc=</digestvalue>             </reference>         </signedinfo>         <signaturevalue>encoded</signaturevalue>         <keyinfo>             <x509data>                 <x509certificate>encoded</x509certificate>             </x509data>         </keyinfo>     </signature>

everything found on internet validate needs public key. don't have it. have digestvalue. know if possible validate using diggestvalue?

here's have far. problem key x509keyselector

documentbuilderfactory dbf = documentbuilderfactory.newinstance();     dbf.setnamespaceaware(true);     documentbuilder builder = dbf.newdocumentbuilder();     document doc = builder.parse("/home/test.xml");     node nl = doc.getelementsbytagnamens(xmlsignature.xmlns, "signature").item(0);     domvalidatecontext valcontext = new domvalidatecontext(new x509keyselector(publickey), nl);     xmlsignaturefactory factory = xmlsignaturefactory.getinstance("dom");     xmlsignature signature = factory.unmarshalxmlsignature(valcontext);     system.out.println(signature.validate(valcontext));

thanks in advance.

you x509 key embedded x509 certificate.

update:

doing google search "xml signature x509certificate" turned this page, seem give answers need.


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