mirror of
https://github.com/owasp-modsecurity/ModSecurity.git
synced 2025-08-14 13:56:01 +03:00
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
/*
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* ModSecurity, http://www.modsecurity.org/
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* Copyright (c) 2015 - 2023 Trustwave Holdings, Inc. (http://www.trustwave.com/)
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*
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* You may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* If any of the files related to licensing are missing or if you have any
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* other questions related to licensing please contact Trustwave Holdings, Inc.
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* directly using the email address security@modsecurity.org.
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*
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*/
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#include "src/operators/validate_dtd.h"
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#include <string>
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#include "src/request_body_processor/xml.h"
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#include "src/utils/system.h"
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#include "src/operators/operator.h"
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namespace modsecurity {
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namespace operators {
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#ifdef WITH_LIBXML2
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bool ValidateDTD::init(const std::string &file, std::string *error) {
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std::string err;
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m_resource = utils::find_resource(m_param, file, &err);
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if (m_resource == "") {
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error->assign("XML: File not found: " + m_param + ". " + err);
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return false;
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}
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xmlThrDefSetGenericErrorFunc(NULL,
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null_error);
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xmlSetGenericErrorFunc(NULL,
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null_error);
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return true;
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}
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bool ValidateDTD::evaluate(Transaction *transaction, const std::string &str) {
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XmlDtdPtrManager dtd(xmlParseDTD(NULL, (const xmlChar *)m_resource.c_str()));
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if (dtd.get() == NULL) {
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std::string err = std::string("XML: Failed to load DTD: ") \
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+ m_resource;
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ms_dbg_a(transaction, 4, err);
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return true;
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}
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if (transaction->m_xml->m_data.doc == NULL) {
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ms_dbg_a(transaction, 4, "XML document tree could not "\
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"be found for DTD validation.");
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return true;
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}
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if (transaction->m_xml->m_data.well_formed != 1) {
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ms_dbg_a(transaction, 4, "XML: DTD validation failed because " \
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"content is not well formed.");
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return true;
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}
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#if 0
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/* Make sure there were no other generic processing errors */
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if (msr->msc_reqbody_error) {
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*error_msg = apr_psprintf(msr->mp,
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"XML: DTD validation could not proceed due to previous"
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" processing errors.");
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return 1;
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}
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#endif
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xmlValidCtxtPtr cvp = xmlNewValidCtxt();
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if (cvp == NULL) {
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ms_dbg_a(transaction, 4, "XML: Failed to create a validation context.");
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return true;
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}
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/* Send validator errors/warnings to msr_log */
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cvp->error = (xmlSchemaValidityErrorFunc)error_runtime;
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cvp->warning = (xmlSchemaValidityErrorFunc)warn_runtime;
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cvp->userData = transaction;
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if (!xmlValidateDtd(cvp, transaction->m_xml->m_data.doc, dtd.get())) {
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ms_dbg_a(transaction, 4, "XML: DTD validation failed.");
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xmlFreeValidCtxt(cvp);
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return true;
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}
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ms_dbg_a(transaction, 4, std::string("XML: Successfully validated " \
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"payload against DTD: ") + m_resource);
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xmlFreeValidCtxt(cvp);
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return false;
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}
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#endif
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} // namespace operators
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} // namespace modsecurity
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