Output

When you build and run the KeyFromNode code, you should get the following output.

Input signature element:

<?xml version="1.0"?>
<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#dsa-sha1"/>
    <ds:Reference URI="#HelloWorld" Type="http://www.w3.org/2000/09/xmldsig#;Object">
      <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
      <ds:DigestValue>BQKNAJjTw98dp7Uvw4oAmJU8LSU=</ds:DigestValue>
    </ds:Reference>
  </ds:SignedInfo>
  <ds:SignatureValue>SxbzV35amsuf4mtKgMHps0Fdm6U98
          fF6vF81CUpmXVd9ULLXeXH5Ew==
  </ds:SignatureValue>
  <ds:Object Id="HelloWorld" MimeType="text/plain">Hello, World!</ds:Object>
  <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
    <KeyValue>
      <DSAKeyValue>
        <P>wLHwVoUYz2txHkKnKUQoN/u1ftCXqw61edb/
           pC1WPv6EV6FBXl0E8vGHHjfzm2ZLm4Gu/j8v
           sNXYDTi8zGFXmhqOO5Me2sUpOgbUzZpeZ7ZN
           0YMaFXWzgeKDg/gb9DrK/USj4BGueB3HAzmF
           QT8Qu6SM/YBGZKph7JTddYXbodU=
        </P>
        <Q>nkI1onvHNR4tMSvPMc0rhOBHgME=</Q>
        <G>QD6OUOIeg64nvtvVbp1Rblw+ehmpPCIjG1Aq+
           w67C3PHqRfor9fBeKf6J6Ap1i1QsBBSau6SOO
           LLkHvR2jwsgyAdYMYSuUYoTJZ66pGkMy2U712
           1/oKrlkF8MrEZh3esA2JfvF+h396K2Wa/Nvl9
           s8xTcDhxLepcndAewKhz5nY=
        </G>
        <Y>rv1GX+/qY99y0xGrdaJANlm7YjJ5/j7famSv6
           cHVwtY79WXFFBDlFGNVOKGiYGsRG6BXX00G
           4yHLOndIsywsMYDejB+TuUfvkGcEPGDZErtPy1F
           /xgJ48jhPttwrv8Wy3k279+ufB27NpBC/
           vW2Rxf3bh22L7V0KNa0VuTwie2g=
        </Y>
        <PgenCounter>AAAAZQ==</PgenCounter>
        <Seed>soBYpnG6Yy/B4Or2y1zqB2mZr/U=</Seed>
      </DSAKeyValue>
    </KeyValue>
  </KeyInfo>
</ds:Signature>


The signature has been verified.