void DSIGSignature::load()

in xsec/dsig/DSIGSignature.cpp [573:674]
45 lines of code
16 McCabe index (conditional complexity)

void DSIGSignature::load() {

    // Load all the information from the source document into local variables for easier
    // manipulation by the other functions in the class

    if (mp_sigNode == NULL) {

        // Attempt to load an empty signature element
        throw XSECException(XSECException::LoadEmptySignature);

    }

    if (!strEquals(getDSIGLocalName(mp_sigNode), "Signature")) {

        throw XSECException(XSECException::LoadNonSignature);

    }

    m_loaded = true;

    // Find the prefix being used so that we can later use it to manipulate the signature
    mp_env->setDSIGNSPrefix(mp_sigNode->getPrefix());

    // Now check for SignedInfo
    DOMNode*tmpElt = mp_sigNode->getFirstChild();

    while (tmpElt != 0 && (tmpElt->getNodeType() != DOMNode::ELEMENT_NODE))
        // Skip text and comments
        tmpElt = tmpElt->getNextSibling();

    if (tmpElt == 0 || !strEquals(getDSIGLocalName(tmpElt), "SignedInfo")) {

            throw XSECException(XSECException::ExpectedDSIGChildNotFound,
                    "Expected <SignedInfo> as first child of <Signature>");

    }

    // Have a signed info

    XSECnew(mp_signedInfo, DSIGSignedInfo(mp_doc, mp_formatter, tmpElt, mp_env));
    mp_signedInfo->load();

    // Look at Signature Value
    tmpElt = findNextElementChild(tmpElt);
    if (tmpElt == 0 || !strEquals(getDSIGLocalName(tmpElt), "SignatureValue")) {

        throw XSECException(XSECException::ExpectedDSIGChildNotFound,
            "Expected <SignatureValue> node");

    }

    DOMNode*tmpSV = tmpElt->getFirstChild();
    while (tmpSV != 0 && tmpSV->getNodeType() != DOMNode::TEXT_NODE)
        tmpSV = tmpSV->getNextSibling();

    if (tmpSV == 0)
        throw XSECException(XSECException::ExpectedDSIGChildNotFound,
        "Expected TEXT child of <SignatureValue>");

    mp_signatureValueNode = tmpElt;

    // The signature value is transcoded to local code page, as it is easier
    // to work with, and should be low ASCII in any case (Base64)

    m_signatureValueSB.sbTranscodeIn(tmpSV->getNodeValue());


    // Now look at KeyInfo
    tmpElt = findNextElementChild(tmpElt);

    if (tmpElt != 0 && strEquals(getDSIGLocalName(tmpElt), "KeyInfo")) {

        // Have a keyInfo

        mp_KeyInfoNode = tmpElt;        // In case we later want to manipulate it

        m_keyInfoList.loadListFromXML(tmpElt);

        tmpElt = findNextElementChild(tmpElt);
    }

    while (tmpElt != 0 && strEquals(getDSIGLocalName(tmpElt), "Object")) {

        DSIGObject* obj;
        XSECnew(obj, DSIGObject(mp_env, tmpElt));
        obj->load();

        m_objects.push_back(obj);

        tmpElt = findNextElementChild(tmpElt);

    }
/*
    * Strictly speaking, this should remain, but it causes too many problems with non
    * conforming signatures

    if (tmpElt != 0) {
        throw XSECException(XSECException::ExpectedDSIGChildNotFound,
            "DSIGSignature::load - Unexpected (non Object) Element found at end of signature");
    }
*/
}