xml signing example 1

xmlsign1.xml

<?xml version="1.0" encoding="UTF-8"?>
<document>
  <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
    <SignedInfo>
      <CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
      <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
      <Reference>
        <Transforms>
          <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
          <Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
        </Transforms>
        <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
        <DigestValue/>
      </Reference>
    </SignedInfo>
    <SignatureValue/>
    <KeyInfo>
      <X509Data/>
    </KeyInfo>
  </Signature>
  <firstelement attr1="attr1">
    Content of first element.
    <secondelement attr2="attr2">
      Content of the second element.
      <thirdelement attr3="attr3">
        And the content of the third element.
      </thirdelement>
    </secondelement>
  </firstelement>
</document>