Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1352 insertions, 0 deletions

diff --git a/xmlsecurity/source/helper/ooxmlsecparser.cxx b/xmlsecurity/source/helper/ooxmlsecparser.cxx
new file mode 100644
index 000000000..2692190cc
--- /dev/null
+++ b/xmlsecurity/source/helper/ooxmlsecparser.cxx
@@ -0,0 +1,1352 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+
+#include "ooxmlsecparser.hxx"
+#include <xmlsignaturehelper.hxx>
+#include <xsecctl.hxx>
+
+#include <xmloff/xmlnamespace.hxx>
+#include <xmloff/xmltkmap.hxx>
+#include <xmloff/xmlimp.hxx>
+
+#include <com/sun/star/xml/sax/SAXException.hpp>
+
+#include <sal/log.hxx>
+
+using namespace com::sun::star;
+
+class OOXMLSecParser::Context
+{
+    protected:
+        friend class OOXMLSecParser;
+        OOXMLSecParser & m_rParser;
+    private:
+        std::optional<SvXMLNamespaceMap> m_pOldNamespaceMap;
+
+    public:
+        Context(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            : m_rParser(rParser)
+            , m_pOldNamespaceMap(std::move(pOldNamespaceMap))
+        {
+        }
+
+        virtual ~Context() = default;
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& /*xAttrs*/)
+        {
+        }
+
+        virtual void EndElement()
+        {
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const /*nNamespace*/, OUString const& /*rName*/);
+
+        virtual void Characters(OUString const& /*rChars*/)
+        {
+        }
+};
+
+// it's possible that an unsupported element has an Id attribute and a
+// ds:Reference digesting it - probably this means XSecController needs to know
+// about it. (For known elements, the Id attribute is only processed according
+// to the schema.)
+class OOXMLSecParser::UnknownContext
+    : public OOXMLSecParser::Context
+{
+    public:
+        UnknownContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            m_rParser.HandleIdAttr(xAttrs);
+        }
+};
+
+auto OOXMLSecParser::Context::CreateChildContext(
+    std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+    sal_uInt16 const /*nNamespace*/, OUString const& /*rName*/)
+-> std::unique_ptr<Context>
+{
+    // default: create new base context
+    return std::make_unique<UnknownContext>(m_rParser, std::move(pOldNamespaceMap));
+}
+
+/**
+note: anything in ds:Object should be trusted *only* if there is a ds:Reference
+      to it so it is signed (exception: the xades:EncapsulatedX509Certificate).
+      ds:SignedInfo precedes all ds:Object.
+
+      There may be multiple ds:Signature for purpose of counter-signatures
+      but the way XAdES describes these, only the ds:SignatureValue element
+      would be referenced, so requiring a ds:Reference for anything in
+      ds:Object shouldn't cause issues.
+ */
+class OOXMLSecParser::ReferencedContextImpl
+    : public OOXMLSecParser::Context
+{
+    protected:
+        bool m_isReferenced;
+
+    public:
+        ReferencedContextImpl(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_isReferenced(isReferenced)
+        {
+        }
+
+        OUString CheckIdAttrReferenced(css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs)
+        {
+            OUString const id(m_rParser.HandleIdAttr(xAttrs));
+            if (!id.isEmpty() && m_rParser.m_pXSecController->haveReferenceForId(id))
+            {
+                m_isReferenced = true;
+            }
+            return id;
+        }
+};
+
+class OOXMLSecParser::DsX509CertificateContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rValue;
+
+    public:
+        DsX509CertificateContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString& rValue)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rValue(rValue)
+        {
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_rValue += rChars;
+        }
+};
+
+class OOXMLSecParser::DsX509SerialNumberContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rValue;
+
+    public:
+        DsX509SerialNumberContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString& rValue)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rValue(rValue)
+        {
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_rValue += rChars;
+        }
+};
+
+class OOXMLSecParser::DsX509IssuerNameContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rValue;
+
+    public:
+        DsX509IssuerNameContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString& rValue)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rValue(rValue)
+        {
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_rValue += rChars;
+        }
+};
+
+class OOXMLSecParser::DsX509IssuerSerialContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rX509IssuerName;
+        OUString & m_rX509SerialNumber;
+
+    public:
+        DsX509IssuerSerialContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString& rIssuerName, OUString& rSerialNumber)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rX509IssuerName(rIssuerName)
+            , m_rX509SerialNumber(rSerialNumber)
+        {
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "X509IssuerName")
+            {
+                return std::make_unique<DsX509IssuerNameContext>(m_rParser, std::move(pOldNamespaceMap), m_rX509IssuerName);
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "X509SerialNumber")
+            {
+                return std::make_unique<DsX509SerialNumberContext>(m_rParser, std::move(pOldNamespaceMap), m_rX509SerialNumber);
+            }
+            // missing: ds:X509SKI, ds:X509SubjectName, ds:X509CRL
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+/// can't be sure what is supposed to happen here because the spec is clear as mud
+class OOXMLSecParser::DsX509DataContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        // sigh... "No ordering is implied by the above constraints."
+        // so store the ball of mud in vectors and try to figure it out later.
+        std::vector<std::pair<OUString, OUString>> m_X509IssuerSerials;
+        std::vector<OUString> m_X509Certificates;
+
+    public:
+        DsX509DataContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+        {
+        }
+
+        virtual void EndElement() override
+        {
+            m_rParser.m_pXSecController->setX509Data(m_X509IssuerSerials, m_X509Certificates);
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "X509IssuerSerial")
+            {
+                m_X509IssuerSerials.emplace_back();
+                return std::make_unique<DsX509IssuerSerialContext>(m_rParser, std::move(pOldNamespaceMap), m_X509IssuerSerials.back().first, m_X509IssuerSerials.back().second);
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "X509Certificate")
+            {
+                m_X509Certificates.emplace_back();
+                return std::make_unique<DsX509CertificateContext>(m_rParser, std::move(pOldNamespaceMap), m_X509Certificates.back());
+            }
+            // missing: ds:X509SKI, ds:X509SubjectName, ds:X509CRL
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::DsKeyInfoContext
+    : public OOXMLSecParser::Context
+{
+    public:
+        DsKeyInfoContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            m_rParser.HandleIdAttr(xAttrs);
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "X509Data")
+            {
+                return std::make_unique<DsX509DataContext>(m_rParser, std::move(pOldNamespaceMap));
+            }
+            // missing: ds:PGPData
+            // missing: ds:KeyName, ds:KeyValue, ds:RetrievalMethod, ds:SPKIData, ds:MgmtData
+            // (old code would read ds:Transform inside ds:RetrievalMethod but
+            // presumably that was a bug)
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+
+};
+
+class OOXMLSecParser::DsSignatureValueContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString m_Value;
+
+    public:
+        DsSignatureValueContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            m_rParser.HandleIdAttr(xAttrs);
+        }
+
+        virtual void EndElement() override
+        {
+            m_rParser.m_pXSecController->setSignatureValue(m_Value);
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_Value += rChars;
+        }
+};
+
+class OOXMLSecParser::DsDigestValueContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rValue;
+
+    public:
+        DsDigestValueContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString & rValue)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rValue(rValue)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& /*xAttrs*/) override
+        {
+            m_rValue.clear();
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_rValue += rChars;
+        }
+};
+
+class OOXMLSecParser::DsDigestMethodContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        sal_Int32 & m_rReferenceDigestID;
+
+    public:
+        DsDigestMethodContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                sal_Int32& rReferenceDigestID)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rReferenceDigestID(rReferenceDigestID)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            OUString ouAlgorithm = xAttrs->getValueByName("Algorithm");
+
+            SAL_WARN_IF( ouAlgorithm.isEmpty(), "xmlsecurity.helper", "no Algorithm in Reference" );
+            if (ouAlgorithm.isEmpty())
+                return;
+
+            SAL_WARN_IF( ouAlgorithm != ALGO_XMLDSIGSHA1
+                         && ouAlgorithm != ALGO_XMLDSIGSHA256
+                         && ouAlgorithm != ALGO_XMLDSIGSHA512,
+                         "xmlsecurity.helper", "Algorithm neither SHA1, SHA256 nor SHA512");
+            if (ouAlgorithm == ALGO_XMLDSIGSHA1)
+                m_rReferenceDigestID = css::xml::crypto::DigestID::SHA1;
+            else if (ouAlgorithm == ALGO_XMLDSIGSHA256)
+                m_rReferenceDigestID = css::xml::crypto::DigestID::SHA256;
+            else if (ouAlgorithm == ALGO_XMLDSIGSHA512)
+                m_rReferenceDigestID = css::xml::crypto::DigestID::SHA512;
+            else
+                m_rReferenceDigestID = 0;
+        }
+};
+
+class OOXMLSecParser::DsTransformContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        bool & m_rIsC14N;
+
+    public:
+        DsTransformContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool& rIsC14N)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rIsC14N(rIsC14N)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            OUString aAlgorithm = xAttrs->getValueByName("Algorithm");
+
+            if (aAlgorithm == ALGO_RELATIONSHIP)
+            {
+                m_rIsC14N = true;
+            }
+        }
+};
+
+class OOXMLSecParser::DsTransformsContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        bool & m_rIsC14N;
+
+    public:
+        DsTransformsContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool& rIsC14N)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rIsC14N(rIsC14N)
+        {
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "Transform")
+            {
+                return std::make_unique<DsTransformContext>(m_rParser, std::move(pOldNamespaceMap), m_rIsC14N);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::DsReferenceContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString m_URI;
+        OUString m_Type;
+        OUString m_DigestValue;
+        bool m_IsC14N = false;
+        // Relevant for ODF. The digest algorithm selected by the DigestMethod
+        // element's Algorithm attribute. @see css::xml::crypto::DigestID.
+        sal_Int32 m_nReferenceDigestID = css::xml::crypto::DigestID::SHA256;
+
+    public:
+        DsReferenceContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            m_rParser.HandleIdAttr(xAttrs);
+
+            m_URI = xAttrs->getValueByName("URI");
+            SAL_WARN_IF(m_URI.isEmpty(), "xmlsecurity.helper", "URI is empty");
+            // Remember the type of this reference.
+            m_Type = xAttrs->getValueByName("Type");
+        }
+
+        virtual void EndElement() override
+        {
+            if (m_URI.startsWith("#"))
+            {
+                /*
+                * remove the first character '#' from the attribute value
+                */
+                m_rParser.m_pXSecController->addReference(m_URI.copy(1), m_nReferenceDigestID, m_Type);
+            }
+            else
+            {
+                if (m_IsC14N) // this is determined by nested ds:Transform
+                {
+                    m_rParser.m_pXSecController->addStreamReference(m_URI, false, m_nReferenceDigestID);
+                }
+                else
+            /*
+            * it must be an octet stream
+            */
+                {
+                    m_rParser.m_pXSecController->addStreamReference(m_URI, true, m_nReferenceDigestID);
+                }
+            }
+
+            m_rParser.m_pXSecController->setDigestValue(m_nReferenceDigestID, m_DigestValue);
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "Transforms")
+            {
+                return std::make_unique<DsTransformsContext>(m_rParser, std::move(pOldNamespaceMap), m_IsC14N);
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "DigestMethod")
+            {
+                return std::make_unique<DsDigestMethodContext>(m_rParser, std::move(pOldNamespaceMap), m_nReferenceDigestID);
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "DigestValue")
+            {
+                return std::make_unique<DsDigestValueContext>(m_rParser, std::move(pOldNamespaceMap), m_DigestValue);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::DsSignatureMethodContext
+    : public OOXMLSecParser::Context
+{
+    public:
+        DsSignatureMethodContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            OUString ouAlgorithm = xAttrs->getValueByName("Algorithm");
+            if (ouAlgorithm == ALGO_ECDSASHA1 || ouAlgorithm == ALGO_ECDSASHA256
+                || ouAlgorithm == ALGO_ECDSASHA512)
+            {
+                m_rParser.m_pXSecController->setSignatureMethod(svl::crypto::SignatureMethodAlgorithm::ECDSA);
+            }
+        }
+};
+
+class OOXMLSecParser::DsSignedInfoContext
+    : public OOXMLSecParser::Context
+{
+    public:
+        DsSignedInfoContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            m_rParser.HandleIdAttr(xAttrs);
+        }
+
+        virtual void EndElement() override
+        {
+            m_rParser.m_pXSecController->setReferenceCount();
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "SignatureMethod")
+            {
+                return std::make_unique<DsSignatureMethodContext>(m_rParser, std::move(pOldNamespaceMap));
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "Reference")
+            {
+                return std::make_unique<DsReferenceContext>(m_rParser, std::move(pOldNamespaceMap));
+            }
+            // missing: ds:CanonicalizationMethod
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::XadesCertDigestContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rDigestValue;
+        sal_Int32 & m_rReferenceDigestID;
+
+    public:
+        XadesCertDigestContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString& rDigestValue, sal_Int32& rReferenceDigestID)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rDigestValue(rDigestValue)
+            , m_rReferenceDigestID(rReferenceDigestID)
+        {
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "DigestMethod")
+            {
+                return std::make_unique<DsDigestMethodContext>(m_rParser, std::move(pOldNamespaceMap), m_rReferenceDigestID);
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "DigestValue")
+            {
+                return std::make_unique<DsDigestValueContext>(m_rParser, std::move(pOldNamespaceMap), m_rDigestValue);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::XadesCertContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    private:
+        sal_Int32 m_nReferenceDigestID = css::xml::crypto::DigestID::SHA1;
+        OUString m_CertDigest;
+        OUString m_X509IssuerName;
+        OUString m_X509SerialNumber;
+
+    public:
+        XadesCertContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual void EndElement() override
+        {
+            if (m_isReferenced)
+            {
+                m_rParser.m_pXSecController->setX509CertDigest(m_CertDigest, m_nReferenceDigestID, m_X509IssuerName, m_X509SerialNumber);
+            }
+            else
+            {
+                SAL_INFO("xmlsecurity.helper", "ignoring unsigned xades:Cert");
+            }
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_XADES132 && rName == "CertDigest")
+            {
+                return std::make_unique<XadesCertDigestContext>(m_rParser, std::move(pOldNamespaceMap), m_CertDigest, m_nReferenceDigestID);
+            }
+            if (nNamespace == XML_NAMESPACE_XADES132 && rName == "IssuerSerial")
+            {
+                return std::make_unique<DsX509IssuerSerialContext>(m_rParser, std::move(pOldNamespaceMap), m_X509IssuerName, m_X509SerialNumber);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::XadesSigningCertificateContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    public:
+        XadesSigningCertificateContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_XADES132 && rName == "Cert")
+            {
+                return std::make_unique<XadesCertContext>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::XadesSigningTimeContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    private:
+        OUString m_Value;
+
+    public:
+        XadesSigningTimeContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual void EndElement() override
+        {
+            if (m_isReferenced)
+            {
+                m_rParser.m_pXSecController->setDate("", m_Value);
+            }
+            else
+            {
+                SAL_INFO("xmlsecurity.helper", "ignoring unsigned SigningTime");
+            }
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_Value += rChars;
+        }
+};
+
+class OOXMLSecParser::XadesSignedSignaturePropertiesContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    public:
+        XadesSignedSignaturePropertiesContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            CheckIdAttrReferenced(xAttrs);
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_XADES132 && rName == "SigningTime")
+            {
+                return std::make_unique<XadesSigningTimeContext>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            if (nNamespace == XML_NAMESPACE_XADES132 && rName == "SigningCertificate")
+            {
+                return std::make_unique<XadesSigningCertificateContext>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            // missing: xades:SignaturePolicyIdentifier, xades:SignatureProductionPlace, xades:SignerRole
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::XadesSignedPropertiesContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    public:
+        XadesSignedPropertiesContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            CheckIdAttrReferenced(xAttrs);
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_XADES132 && rName == "SignedSignatureProperties")
+            {
+                return std::make_unique<XadesSignedSignaturePropertiesContext>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            // missing: xades:SignedDataObjectProperties
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::XadesQualifyingPropertiesContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    public:
+        XadesQualifyingPropertiesContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            CheckIdAttrReferenced(xAttrs);
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_XADES132 && rName == "SignedProperties")
+            {
+                return std::make_unique<XadesSignedPropertiesContext>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            // missing: xades:UnsignedSignatureProperties
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::MsodigsigSetupIDContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rValue;
+
+    public:
+        MsodigsigSetupIDContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString& rValue)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rValue(rValue)
+        {
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_rValue += rChars;
+        }
+};
+
+class OOXMLSecParser::MsodigsigSignatureCommentsContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rValue;
+
+    public:
+        MsodigsigSignatureCommentsContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString& rValue)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rValue(rValue)
+        {
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_rValue += rChars;
+        }
+};
+
+class OOXMLSecParser::MsodigsigSignatureInfoV1Context
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    private:
+        OUString m_SetupID;
+        OUString m_SignatureComments;
+
+    public:
+        MsodigsigSignatureInfoV1Context(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            CheckIdAttrReferenced(xAttrs);
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_MSODIGSIG && rName == "SetupID")
+            {
+                return std::make_unique<MsodigsigSetupIDContext>(m_rParser, std::move(pOldNamespaceMap), m_SetupID);
+            }
+            if (nNamespace == XML_NAMESPACE_MSODIGSIG && rName == "SignatureComments")
+            {
+                return std::make_unique<MsodigsigSignatureCommentsContext>(m_rParser, std::move(pOldNamespaceMap), m_SignatureComments);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+
+        virtual void EndElement() override
+        {
+            if (m_isReferenced)
+            {
+                if (!m_SetupID.isEmpty())
+                {
+                    m_rParser.m_pXSecController->setSignatureLineId(m_SetupID);
+                }
+                if (!m_SignatureComments.isEmpty())
+                {
+                    m_rParser.m_pXSecController->setDescription("", m_SignatureComments);
+
+                }
+            }
+            else
+            {
+                SAL_INFO("xmlsecurity.helper", "ignoring unsigned SignatureInfoV1");
+            }
+        }
+};
+
+class OOXMLSecParser::MdssiValueContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rValue;
+
+    public:
+        MdssiValueContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString& rValue)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rValue(rValue)
+        {
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_rValue += rChars;
+        }
+};
+
+class OOXMLSecParser::MdssiSignatureTimeContext
+    : public OOXMLSecParser::Context
+{
+    private:
+        OUString & m_rValue;
+
+    public:
+        MdssiSignatureTimeContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                OUString& rValue)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+            , m_rValue(rValue)
+        {
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_MDSSI && rName == "Value")
+            {
+                return std::make_unique<MdssiValueContext>(m_rParser, std::move(pOldNamespaceMap), m_rValue);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+
+class OOXMLSecParser::DsSignaturePropertyContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    private:
+        enum class SignatureProperty { Unknown, Date, Info };
+        SignatureProperty m_Property = SignatureProperty::Unknown;
+        OUString m_Id;
+        OUString m_Value;
+
+    public:
+        DsSignaturePropertyContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            m_Id = CheckIdAttrReferenced(xAttrs);
+        }
+
+        virtual void EndElement() override
+        {
+            if (m_isReferenced)
+            {
+                switch (m_Property)
+                {
+                    case SignatureProperty::Unknown:
+                        SAL_INFO("xmlsecurity.helper", "Unknown property in ds:Object ignored");
+                        break;
+                    case SignatureProperty::Info:
+                        break; // handled by child context
+                    case SignatureProperty::Date:
+                        m_rParser.m_pXSecController->setDate(m_Id, m_Value);
+                        break;
+                }
+            }
+            else
+            {
+                SAL_INFO("xmlsecurity.helper", "ignoring unsigned SignatureProperty");
+            }
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_MDSSI && rName == "SignatureTime")
+            {
+                m_Property = SignatureProperty::Date;
+                return std::make_unique<MdssiSignatureTimeContext>(m_rParser, std::move(pOldNamespaceMap), m_Value);
+            }
+            if (nNamespace == XML_NAMESPACE_MSODIGSIG && rName == "SignatureInfoV1")
+            {
+                return std::make_unique<MsodigsigSignatureInfoV1Context>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::DsSignaturePropertiesContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    public:
+        DsSignaturePropertiesContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            CheckIdAttrReferenced(xAttrs);
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "SignatureProperty")
+            {
+                return std::make_unique<DsSignaturePropertyContext>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::DsManifestContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+    public:
+        DsManifestContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+                bool const isReferenced)
+            : ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), isReferenced)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            CheckIdAttrReferenced(xAttrs);
+        }
+
+#if 0
+        ???
+        virtual void EndElement() override
+        {
+            m_rParser.m_pXSecController->setReferenceCount();
+        }
+#endif
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "Reference")
+            {
+                return std::make_unique<DsReferenceContext>(m_rParser, std::move(pOldNamespaceMap));
+            }
+            // missing: ds:CanonicalizationMethod
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::DsObjectContext
+    : public OOXMLSecParser::ReferencedContextImpl
+{
+        enum class Mode { Default, ValidSignatureLineImage, InvalidSignatureLineImage };
+        Mode m_Mode = Mode::Default;
+        OUString m_Value;
+
+    public:
+        DsObjectContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            // init with "false" here - the Signature element can't be referenced by its child
+            : OOXMLSecParser::ReferencedContextImpl(rParser, std::move(pOldNamespaceMap), false)
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            OUString const id(CheckIdAttrReferenced(xAttrs));
+            if (id == "idValidSigLnImg")
+            {
+                m_Mode = Mode::ValidSignatureLineImage;
+            }
+            else if (id == "idInvalidSigLnImg")
+            {
+                m_Mode = Mode::InvalidSignatureLineImage;
+            }
+        }
+
+        virtual void EndElement() override
+        {
+            switch (m_Mode)
+            {
+                case Mode::ValidSignatureLineImage:
+                    if (m_isReferenced)
+                    {
+                        m_rParser.m_pXSecController->setValidSignatureImage(m_Value);
+                    }
+                    else
+                    {
+                        SAL_INFO("xmlsecurity.helper", "ignoring unsigned SignatureLineValidImage");
+                    }
+                    break;
+                case Mode::InvalidSignatureLineImage:
+                    if (m_isReferenced)
+                    {
+                        m_rParser.m_pXSecController->setInvalidSignatureImage(m_Value);
+                    }
+                    else
+                    {
+                        SAL_INFO("xmlsecurity.helper", "ignoring unsigned SignatureLineInvalidImage");
+                    }
+                    break;
+                case Mode::Default:
+                    break;
+            }
+        }
+
+        virtual void Characters(OUString const& rChars) override
+        {
+            m_Value += rChars;
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "SignatureProperties")
+            {
+                return std::make_unique<DsSignaturePropertiesContext>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            if (nNamespace == XML_NAMESPACE_XADES132 && rName == "QualifyingProperties")
+            {
+                return std::make_unique<XadesQualifyingPropertiesContext>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "Manifest")
+            {
+                return std::make_unique<DsManifestContext>(m_rParser, std::move(pOldNamespaceMap), m_isReferenced);
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+class OOXMLSecParser::DsSignatureContext
+    : public OOXMLSecParser::Context
+{
+    public:
+        DsSignatureContext(OOXMLSecParser& rParser,
+                std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap)
+            : OOXMLSecParser::Context(rParser, std::move(pOldNamespaceMap))
+        {
+        }
+
+        virtual void StartElement(
+            css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs) override
+        {
+            OUString const ouIdAttr(m_rParser.HandleIdAttr(xAttrs));
+            m_rParser.m_rXMLSignatureHelper.StartVerifySignatureElement();
+            m_rParser.m_pXSecController->addSignature();
+            if (!ouIdAttr.isEmpty())
+            {
+                m_rParser.m_pXSecController->setId( ouIdAttr );
+            }
+        }
+
+        virtual std::unique_ptr<Context> CreateChildContext(
+            std::optional<SvXMLNamespaceMap>&& pOldNamespaceMap,
+            sal_uInt16 const nNamespace, OUString const& rName) override
+        {
+            if (nNamespace == XML_NAMESPACE_DS && rName == "SignedInfo")
+            {
+                return std::make_unique<DsSignedInfoContext>(m_rParser, std::move(pOldNamespaceMap));
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "SignatureValue")
+            {
+                return std::make_unique<DsSignatureValueContext>(m_rParser, std::move(pOldNamespaceMap));
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "KeyInfo")
+            {
+                return std::make_unique<DsKeyInfoContext>(m_rParser, std::move(pOldNamespaceMap));
+            }
+            if (nNamespace == XML_NAMESPACE_DS && rName == "Object")
+            {
+                return std::make_unique<DsObjectContext>(m_rParser, std::move(pOldNamespaceMap));
+            }
+            return OOXMLSecParser::Context::CreateChildContext(std::move(pOldNamespaceMap), nNamespace, rName);
+        }
+};
+
+
+OOXMLSecParser::OOXMLSecParser(XMLSignatureHelper& rXMLSignatureHelper, XSecController* pXSecController)
+    : m_pNamespaceMap(SvXMLNamespaceMap())
+    , m_pXSecController(pXSecController)
+    ,m_rXMLSignatureHelper(rXMLSignatureHelper)
+{
+    using namespace xmloff::token;
+    m_pNamespaceMap->Add( GetXMLToken(XML_XML), GetXMLToken(XML_N_XML), XML_NAMESPACE_XML );
+    m_pNamespaceMap->Add( "_ds", GetXMLToken(XML_N_DS), XML_NAMESPACE_DS );
+    m_pNamespaceMap->Add( "_xades132", GetXMLToken(XML_N_XADES132), XML_NAMESPACE_XADES132);
+    m_pNamespaceMap->Add( "_xades141", GetXMLToken(XML_N_XADES141), XML_NAMESPACE_XADES141);
+    m_pNamespaceMap->Add( "_dc", GetXMLToken(XML_N_DC), XML_NAMESPACE_DC );
+    m_pNamespaceMap->Add( "_mdssi", NS_MDSSI, XML_NAMESPACE_MDSSI );
+    m_pNamespaceMap->Add( "_msodigsig", "http://schemas.microsoft.com/office/2006/digsig", XML_NAMESPACE_MSODIGSIG );
+    m_pNamespaceMap->Add( "_office_libo",
+                         GetXMLToken(XML_N_LO_EXT), XML_NAMESPACE_LO_EXT);
+}
+
+OOXMLSecParser::~OOXMLSecParser()
+{
+}
+
+OUString OOXMLSecParser::HandleIdAttr(css::uno::Reference<css::xml::sax::XAttributeList> const& xAttrs)
+{
+    OUString const aId = xAttrs->getValueByName("Id");
+    if (!aId.isEmpty())
+    {
+        m_pXSecController->collectToVerify(aId);
+    }
+    return aId;
+}
+
+void SAL_CALL OOXMLSecParser::startDocument()
+{
+    if (m_xNextHandler.is())
+        m_xNextHandler->startDocument();
+}
+
+void SAL_CALL OOXMLSecParser::endDocument()
+{
+    if (m_xNextHandler.is())
+        m_xNextHandler->endDocument();
+}
+
+void SAL_CALL OOXMLSecParser::startElement(const OUString& rName, const uno::Reference<xml::sax::XAttributeList>& xAttribs)
+{
+    assert(m_pNamespaceMap);
+    std::optional<SvXMLNamespaceMap> pRewindMap(
+        SvXMLImport::processNSAttributes(m_pNamespaceMap, nullptr, xAttribs));
+
+    OUString localName;
+    sal_uInt16 const nPrefix(m_pNamespaceMap->GetKeyByAttrName(rName, &localName));
+
+    std::unique_ptr<Context> pContext;
+
+    if (m_ContextStack.empty())
+    {
+        if (nPrefix != XML_NAMESPACE_DS || localName != "Signature")
+        {
+            throw css::xml::sax::SAXException(
+                "xmlsecurity: unexpected root element", nullptr,
+                css::uno::Any());
+        }
+
+        pContext.reset(new DsSignatureContext(*this, std::move(pRewindMap)));
+
+    }
+    else
+    {
+        pContext = m_ContextStack.top()->CreateChildContext(
+                std::move(pRewindMap), nPrefix, localName);
+    }
+
+    m_ContextStack.push(std::move(pContext));
+
+    m_ContextStack.top()->StartElement(xAttribs);
+
+    if (m_xNextHandler.is())
+    {
+        m_xNextHandler->startElement(rName, xAttribs);
+    }
+
+}
+
+void SAL_CALL OOXMLSecParser::endElement(const OUString& rName)
+{
+    assert(!m_ContextStack.empty()); // this should be checked by sax parser?
+
+    m_ContextStack.top()->EndElement();
+
+    if (m_xNextHandler.is())
+    {
+        m_xNextHandler->endElement(rName);
+    }
+
+    if (m_ContextStack.top()->m_pOldNamespaceMap)
+    {
+        m_pNamespaceMap = std::move(m_ContextStack.top()->m_pOldNamespaceMap);
+    }
+    m_ContextStack.pop();
+}
+
+void SAL_CALL OOXMLSecParser::characters(const OUString& rChars)
+{
+    assert(!m_ContextStack.empty()); // this should be checked by sax parser?
+    m_ContextStack.top()->Characters(rChars);
+
+    if (m_xNextHandler.is())
+        m_xNextHandler->characters(rChars);
+}
+
+void SAL_CALL OOXMLSecParser::ignorableWhitespace(const OUString& rWhitespace)
+{
+    if (m_xNextHandler.is())
+        m_xNextHandler->ignorableWhitespace(rWhitespace);
+}
+
+void SAL_CALL OOXMLSecParser::processingInstruction(const OUString& rTarget, const OUString& rData)
+{
+    if (m_xNextHandler.is())
+        m_xNextHandler->processingInstruction(rTarget, rData);
+}
+
+void SAL_CALL OOXMLSecParser::setDocumentLocator(const uno::Reference<xml::sax::XLocator>& xLocator)
+{
+    if (m_xNextHandler.is())
+        m_xNextHandler->setDocumentLocator(xLocator);
+}
+
+void SAL_CALL OOXMLSecParser::initialize(const uno::Sequence<uno::Any>& rArguments)
+{
+    rArguments[0] >>= m_xNextHandler;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */