KeyInfo empty #217

Upon signing the XML with xmlseclibs, my KeyInfo holds no data (no exponent, no modulus).

Here is the code:

` $doc = new \DOMDocument();
$doc->load('./keys/data.xml');

$sig = new XMLSecurityDSig();
try {
$sig->setCanonicalMethod(XMLSecurityDSig::EXC_C14N);
} catch (Exception $e) {
echo $e->getMessage();
}
try {
$privateKey = new XMLSecurityKey(XMLSecurityKey::RSA_SHA1, ['type' => 'private']);
$privateKey->passphrase = 'testtest';
} catch (Exception $e) {
echo $e->getMessage();
}

try {
$privateKey->loadKey('file://keys/testKey.pem');
} catch (Exception $e) {
echo $e->getMessage();
}

$sig->sign($privateKey);
$sig->add509Cert('file://keys/testCert.pem');
$sig->appendSignature($doc->getElementsByTagName('authenticationRequest')[0], false);
$doc->save('./keys/test.xml'); `

Signed document:
<authentication:authenticationRequest xmlns:authentication="http://www.epaslaugos.lt/services/authentication" xmlns:dsig="http://www.w3.org/2000/09/xmldsig#" xmlns:ns3="http://www.w3.org/2001/10/xml-exc-c14n#" id="uniqueNodeId"><authentication:pid>VSID000000000113</authentication:pid><authentication:serviceTarget>citizen</authentication:serviceTarget><authentication:authenticationProvider>auth.lt.identity.card</authentication:authenticationProvider><authentication:authenticationProvider>auth.lt.bank</authentication:authenticationProvider><authentication:authenticationProvider>auth.signatureProvider</authentication:authenticationProvider><authentication:authenticationProvider>auth.login.pass</authentication:authenticationProvider><authentication:authenticationProvider>auth.lt.government.employee.card</authentication:authenticationProvider><authentication:authenticationProvider>auth.stork</authentication:authenticationProvider><authentication:authenticationProvider>auth.tsl.identity.card</authentication:authenticationProvider><authentication:authenticationAttribute>lt-personal-code</authentication:authenticationAttribute><authentication:authenticationAttribute>lt-company-code</authentication:authenticationAttribute><authentication:userInformation>firstName</authentication:userInformation><authentication:userInformation>lastName</authentication:userInformation><authentication:userInformation>companyName</authentication:userInformation><authentication:userInformation>email</authentication:userInformation><authentication:userInformation>address</authentication:userInformation><authentication:postbackUrl>https://localhost/</authentication:postbackUrl><authentication:customData>correlationData</authentication:customData></authentication:authenticationRequest>

Output:

<?xml version="1.0"?> <authentication:authenticationRequest xmlns:authentication="http://www.epaslaugos.lt/services/authentication" xmlns:dsig="http://www.w3.org/2000/09/xmldsig#" xmlns:ns3="http://www.w3.org/2001/10/xml-exc-c14n#" id="uniqueNodeId"><authentication:pid>VSID000000000113</authentication:pid><authentication:serviceTarget>citizen</authentication:serviceTarget><authentication:authenticationProvider>auth.lt.identity.card</authentication:authenticationProvider><authentication:authenticationProvider>auth.lt.bank</authentication:authenticationProvider><authentication:authenticationProvider>auth.signatureProvider</authentication:authenticationProvider><authentication:authenticationProvider>auth.login.pass</authentication:authenticationProvider><authentication:authenticationProvider>auth.lt.government.employee.card</authentication:authenticationProvider><authentication:authenticationProvider>auth.stork</authentication:authenticationProvider><authentication:authenticationProvider>auth.tsl.identity.card</authentication:authenticationProvider><authentication:authenticationAttribute>lt-personal-code</authentication:authenticationAttribute><authentication:authenticationAttribute>lt-company-code</authentication:authenticationAttribute><authentication:userInformation>firstName</authentication:userInformation><authentication:userInformation>lastName</authentication:userInformation><authentication:userInformation>companyName</authentication:userInformation><authentication:userInformation>email</authentication:userInformation><authentication:userInformation>address</authentication:userInformation><authentication:postbackUrl>https://localhost/</authentication:postbackUrl><authentication:customData>correlationData</authentication:customData><dsig:Signature> <dsig:SignedInfo><dsig:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/> <dsig:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/> <dsig:Reference><dsig:Transforms><dsig:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#uniqueNodeId"/></dsig:Transforms><dsig:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><dsig:DigestValue>XidaQDNo4VKa9MDTfj+wwF2ZmfY=</dsig:DigestValue></dsig:Reference></dsig:SignedInfo><dsig:SignatureValue>fs6WHyF9oIMIhu0vvVjOo62YOeBQ3fEgBWMno36akyoDySFZuAtDgLLLmfH+ibkSDBL072/pMt8LhWhDk7fPAWu5EE+rd1wAim0Ap28MAKSlmsfvJ6H/9E3bPCDJZ27yPyBZHIpXRR6sk6YiLop7K5mxch323m9BqCsPaxZNyo712gGyyz0fNTM5jTK3Fl8mckB1SJRnB7JVUJduTBnEBRXvR9q3c6tk8VymWngYOGRDe27Uo9YEJQrnHWGGTOfDitYJR6k56uOZd4wXVwmrLdUBL0z76X/Pu20jLQsDZYx6uKcKQi9eSE15Bf6LS8jIdT9F4FsADEmu9fiNYXsWgg==</dsig:SignatureValue> <dsig:KeyInfo><dsig:X509Data/></dsig:KeyInfo></dsig:Signature></authentication:authenticationRequest>