Android - verify the signature of XML

Question

I have signed XML document (by pure Java with RSA and X509 tags) on the web and I have implemented XML pull parser - before I parse some information from my XML document to specific URL, I need to verify this document if it is the right one. Do you know how to check XML signature?

Thanks

edit:

my XML file looks like follows:

 <?xml version="1.0" encoding="UTF-8" standalone="no" ?> 
  <application id="1">
  <appversion>1.0</appversion> 
  <obligatory>yes</obligatory> 
  <update>http://www.xyz.....</update> 
  <check>http://www.xyz.....</check> 
  <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#WithComments" /> 
      <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" /> 
      <ds:Reference URI="#1">
        <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" /> 
        <ds:DigestValue>fuv...</ds:DigestValue> 
    </ds:Reference>
  </ds:SignedInfo>
  <ds:SignatureValue>PC0+4uO4...</ds:SignatureValue> 
  <ds:KeyInfo>
  <ds:KeyValue>
    <ds:RSAKeyValue>
      <ds:Modulus>gEs/Fn2Gd5evwhlUgoS3...</ds:Modulus> 
      <ds:Exponent>AQAB</ds:Exponent> 
    </ds:RSAKeyValue>
  </ds:KeyValue>
  <ds:X509Data>
    <ds:X509IssuerSerial>
      <ds:X509IssuerName>CN=abc abc,OU=abcs,O=abc,L=abc,ST=abc,C=abc</ds:X509IssuerName> 
      <ds:X509SerialNumber>123456...</ds:X509SerialNumber> 
    </ds:X509IssuerSerial>
    <ds:X509SubjectName>CN=abc abc,OU=abcs,O=abc,L=abc,ST=abc,C=abc</ds:X509SubjectName> 
    <ds:X509Certificate>MIIDhzCCAm+gAwIBAgI...</ds:X509Certificate> 
  </ds:X509Data>
  </ds:KeyInfo>
 </ds:Signature>

Answer 1

In J2EE Java you would use javax.xml.crypto as detailed here

http://java.sun.com/developer/technicalArticles/xml/dig_signature_api/

However these are not part of the standard Android package.

It may be a manageable amount of work to make your own package of the bits of the source you need.

http://google.com/codesearch/p?hl=en#-WpwJU0UKqQ/src/share/classes/javax/xml/crypto/dom/DOMCryptoContext.java&d=5