loplugin:unocast (xmlsecurity::Certificate)

(See the upcoming commit introducing that loplugin:unocast on why such
dynamic_casts from UNO types are dangerous.)

Change-Id: I3d9bd77093d2e6376717d27f105e72ff5a919fe7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/144696
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

12 files changed, 57 insertions, 34 deletions

diff --git a/xmlsecurity/Library_xsec_xmlsec.mk b/xmlsecurity/Library_xsec_xmlsec.mk
index 615c3eba0032..23997aa2bfae 100644
--- a/xmlsecurity/Library_xsec_xmlsec.mk
+++ b/xmlsecurity/Library_xsec_xmlsec.mk
@@ -64,6 +64,7 @@ $(eval $(call gb_Library_use_externals,xsec_xmlsec,\
 
 $(eval $(call gb_Library_add_exception_objects,xsec_xmlsec,\
 	xmlsecurity/source/xmlsec/biginteger \
+	xmlsecurity/source/xmlsec/certificate \
 	xmlsecurity/source/xmlsec/certificateextension_certextn \
 	xmlsecurity/source/xmlsec/errorcallback \
 	xmlsecurity/source/xmlsec/saxhelper \
diff --git a/xmlsecurity/inc/certificate.hxx b/xmlsecurity/inc/certificate.hxx
index 8357f50651a1..885fcc8bd5ff 100644
--- a/xmlsecurity/inc/certificate.hxx
+++ b/xmlsecurity/inc/certificate.hxx
@@ -11,7 +11,13 @@
 
 #include <sal/types.h>
 
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <com/sun/star/security/XCertificate.hpp>
 #include <com/sun/star/uno/Sequence.hxx>
+#include <cppuhelper/implbase.hxx>
+
+#include "xsecxmlsecdllapi.h"
 
 namespace svl
 {
@@ -23,8 +29,10 @@ enum class SignatureMethodAlgorithm;
 
 namespace xmlsecurity
 {
-/// Extension of css::security::XCertificate for module-internal purposes.
-class SAL_NO_VTABLE SAL_DLLPUBLIC_RTTI SAL_LOPLUGIN_ANNOTATE("crosscast") Certificate
+/// Base class of css::security::XCertificate implementations, for module-internal purposes.
+class XSECXMLSEC_DLLPUBLIC Certificate
+    : public ::cppu::WeakImplHelper<css::security::XCertificate, css::lang::XUnoTunnel,
+                                    css::lang::XServiceInfo>
 {
 public:
     /// Returns the SHA-256 thumbprint.
@@ -35,6 +43,9 @@ public:
     /// Same as getSubjectPublicKeyAlgorithm(), but returns an ID, not a string.
     virtual svl::crypto::SignatureMethodAlgorithm getSignatureMethodAlgorithm() = 0;
 
+    sal_Int64 SAL_CALL getSomething(css::uno::Sequence<sal_Int8> const& aIdentifier) override;
+    static css::uno::Sequence<sal_Int8> const& getUnoTunnelId();
+
 protected:
     ~Certificate() noexcept = default;
 };
diff --git a/xmlsecurity/qa/unit/signing/signing.cxx b/xmlsecurity/qa/unit/signing/signing.cxx
index d8518ece0f9b..d75c93de1a4a 100644
--- a/xmlsecurity/qa/unit/signing/signing.cxx
+++ b/xmlsecurity/qa/unit/signing/signing.cxx
@@ -33,6 +33,7 @@
 
 #include <comphelper/processfactory.hxx>
 #include <comphelper/propertysequence.hxx>
+#include <comphelper/servicehelper.hxx>
 #include <unotools/mediadescriptor.hxx>
 #include <unotools/tempfile.hxx>
 #include <unotools/ucbstreamhelper.hxx>
@@ -127,7 +128,7 @@ SigningTest::getCertificate(DocumentSignatureManager& rSignatureManager,
 
     for (const auto& xCertificate : aCertificates)
     {
-        auto pCertificate = dynamic_cast<xmlsecurity::Certificate*>(xCertificate.get());
+        auto pCertificate = comphelper::getFromUnoTunnel<xmlsecurity::Certificate>(xCertificate);
         CPPUNIT_ASSERT(pCertificate);
         if (pCertificate->getSignatureMethodAlgorithm() == eAlgo
             && IsValid(xCertificate, xSecurityEnvironment))
diff --git a/xmlsecurity/source/component/documentdigitalsignatures.cxx b/xmlsecurity/source/component/documentdigitalsignatures.cxx
index 990fa5dea739..d6b5782ba74f 100644
--- a/xmlsecurity/source/component/documentdigitalsignatures.cxx
+++ b/xmlsecurity/source/component/documentdigitalsignatures.cxx
@@ -52,6 +52,7 @@
 #include <comphelper/documentconstants.hxx>
 #include <comphelper/propertyvalue.hxx>
 #include <comphelper/sequence.hxx>
+#include <comphelper/servicehelper.hxx>
 #include <cppuhelper/implbase.hxx>
 #include <comphelper/xmlsechelper.hxx>
 #include <cppuhelper/supportsservice.hxx>
@@ -685,8 +686,8 @@ sal_Bool DocumentDigitalSignatures::isAuthorTrusted(
                 return false;
             uno::Reference<css::security::XCertificate> xCert = aSignatureManager.getSecurityEnvironment()->createCertificateFromAscii(rAuthor.RawData);
 
-            auto pAuthor = dynamic_cast<xmlsecurity::Certificate*>(xAuthor.get());
-            auto pCert = dynamic_cast<xmlsecurity::Certificate*>(xCert.get());
+            auto pAuthor = comphelper::getFromUnoTunnel<xmlsecurity::Certificate>(xAuthor);
+            auto pCert = comphelper::getFromUnoTunnel<xmlsecurity::Certificate>(xCert);
             if (pAuthor && pCert)
                 return pCert->getSHA256Thumbprint() == pAuthor->getSHA256Thumbprint();
 
diff --git a/xmlsecurity/source/gpg/CertificateImpl.cxx b/xmlsecurity/source/gpg/CertificateImpl.cxx
index a0a08fc807a8..ae2c4544e001 100644
--- a/xmlsecurity/source/gpg/CertificateImpl.cxx
+++ b/xmlsecurity/source/gpg/CertificateImpl.cxx
@@ -196,7 +196,8 @@ sal_Int32 SAL_CALL CertificateImpl::getCertificateUsage()
 /* XUnoTunnel */
 sal_Int64 SAL_CALL CertificateImpl::getSomething(const Sequence< sal_Int8 >& aIdentifier)
 {
-    return comphelper::getSomethingImpl(aIdentifier, this);
+    return comphelper::getSomethingImpl(
+        aIdentifier, this, comphelper::FallbackToGetSomethingOf<xmlsecurity::Certificate>{});
 }
 
 /* XUnoTunnel extension */
diff --git a/xmlsecurity/source/gpg/CertificateImpl.hxx b/xmlsecurity/source/gpg/CertificateImpl.hxx
index b6c50cb2ed5c..1c845f5dc103 100644
--- a/xmlsecurity/source/gpg/CertificateImpl.hxx
+++ b/xmlsecurity/source/gpg/CertificateImpl.hxx
@@ -14,13 +14,9 @@
 #include <sal/types.h>
 #include <sal/config.h>
 #include <rtl/ustring.hxx>
-#include <cppuhelper/implbase.hxx>
 
 #include <com/sun/star/uno/Sequence.hxx>
-#include <com/sun/star/lang/XServiceInfo.hpp>
-#include <com/sun/star/lang/XUnoTunnel.hpp>
 #include <com/sun/star/security/CertificateKind.hpp>
-#include <com/sun/star/security/XCertificate.hpp>
 
 #if defined _MSC_VER && defined __clang__
 #pragma clang diagnostic push
@@ -31,10 +27,7 @@
 #pragma clang diagnostic pop
 #endif
 
-class CertificateImpl : public cppu::WeakImplHelper< css::security::XCertificate,
-                                                     css::lang::XUnoTunnel,
-                                                     css::lang::XServiceInfo >,
-                        public xmlsecurity::Certificate
+class CertificateImpl : public xmlsecurity::Certificate
 {
 private:
     GpgME::Key m_pKey;
diff --git a/xmlsecurity/source/helper/documentsignaturemanager.cxx b/xmlsecurity/source/helper/documentsignaturemanager.cxx
index cd08aadacc13..5c6c9efea726 100644
--- a/xmlsecurity/source/helper/documentsignaturemanager.cxx
+++ b/xmlsecurity/source/helper/documentsignaturemanager.cxx
@@ -37,6 +37,7 @@
 #include <com/sun/star/frame/XModel.hpp>
 
 #include <comphelper/base64.hxx>
+#include <comphelper/servicehelper.hxx>
 #include <comphelper/storagehelper.hxx>
 #include <rtl/ustrbuf.hxx>
 #include <sal/log.hxx>
@@ -331,7 +332,7 @@ bool DocumentSignatureManager::add(
         comphelper::Base64::encode(aStrBuffer, xCert->getEncoded());
 
         OUString aKeyId;
-        if (auto pCertificate = dynamic_cast<xmlsecurity::Certificate*>(xCert.get()))
+        if (auto pCertificate = comphelper::getFromUnoTunnel<xmlsecurity::Certificate>(xCert))
         {
             OUStringBuffer aBuffer;
             comphelper::Base64::encode(aBuffer, pCertificate->getSHA256Thumbprint());
@@ -378,7 +379,7 @@ bool DocumentSignatureManager::add(
         OUString aCertDigest;
         svl::crypto::SignatureMethodAlgorithm eAlgorithmID
             = svl::crypto::SignatureMethodAlgorithm::RSA;
-        if (auto pCertificate = dynamic_cast<xmlsecurity::Certificate*>(xCert.get()))
+        if (auto pCertificate = comphelper::getFromUnoTunnel<xmlsecurity::Certificate>(xCert))
         {
             OUStringBuffer aBuffer;
             comphelper::Base64::encode(aBuffer, pCertificate->getSHA256Thumbprint());
diff --git a/xmlsecurity/source/xmlsec/certificate.cxx b/xmlsecurity/source/xmlsec/certificate.cxx
new file mode 100644
index 000000000000..f43273a47518
--- /dev/null
+++ b/xmlsecurity/source/xmlsec/certificate.cxx
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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 <sal/config.h>
+
+#include <comphelper/servicehelper.hxx>
+
+#include <certificate.hxx>
+
+sal_Int64 xmlsecurity::Certificate::getSomething(css::uno::Sequence<sal_Int8> const& aIdentifier)
+{
+    return comphelper::getSomethingImpl(aIdentifier, this);
+}
+
+css::uno::Sequence<sal_Int8> const& xmlsecurity::Certificate::getUnoTunnelId()
+{
+    static comphelper::UnoIdInit const id;
+    return id.getSeq();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/xmlsecurity/source/xmlsec/mscrypt/x509certificate_mscryptimpl.cxx b/xmlsecurity/source/xmlsec/mscrypt/x509certificate_mscryptimpl.cxx
index 88bf6169bf11..96d4b691d3d4 100644
--- a/xmlsecurity/source/xmlsec/mscrypt/x509certificate_mscryptimpl.cxx
+++ b/xmlsecurity/source/xmlsec/mscrypt/x509certificate_mscryptimpl.cxx
@@ -458,7 +458,7 @@ void X509Certificate_MSCryptImpl::setRawCert( Sequence< sal_Int8 > const & rawCe
 }
 
 /* XUnoTunnel */
-UNO3_GETIMPLEMENTATION_IMPL(X509Certificate_MSCryptImpl);
+UNO3_GETIMPLEMENTATION2_IMPL(X509Certificate_MSCryptImpl, Certificate);
 
 static OUString findOIDDescription(char const *oid)
 {
diff --git a/xmlsecurity/source/xmlsec/mscrypt/x509certificate_mscryptimpl.hxx b/xmlsecurity/source/xmlsec/mscrypt/x509certificate_mscryptimpl.hxx
index 9bd6a34ce68e..53016dd6c438 100644
--- a/xmlsecurity/source/xmlsec/mscrypt/x509certificate_mscryptimpl.hxx
+++ b/xmlsecurity/source/xmlsec/mscrypt/x509certificate_mscryptimpl.hxx
@@ -27,20 +27,13 @@
 #include <sal/config.h>
 #include <rtl/ustring.hxx>
 #include <cppuhelper/factory.hxx>
-#include <cppuhelper/implbase.hxx>
 #include <comphelper/servicehelper.hxx>
 #include <com/sun/star/uno/Exception.hpp>
-#include <com/sun/star/lang/XUnoTunnel.hpp>
-#include <com/sun/star/lang/XServiceInfo.hpp>
 #include <com/sun/star/uno/SecurityException.hpp>
 #include <com/sun/star/security/CertificateKind.hpp>
-#include <com/sun/star/security/XCertificate.hpp>
 #include <certificate.hxx>
 
-class X509Certificate_MSCryptImpl : public ::cppu::WeakImplHelper<
-    css::security::XCertificate ,
-    css::lang::XUnoTunnel,
-    css::lang::XServiceInfo > , public xmlsecurity::Certificate
+class X509Certificate_MSCryptImpl : public xmlsecurity::Certificate
 {
     private:
         const CERT_CONTEXT* m_pCertContext ;
diff --git a/xmlsecurity/source/xmlsec/nss/x509certificate_nssimpl.cxx b/xmlsecurity/source/xmlsec/nss/x509certificate_nssimpl.cxx
index 79441da1edf5..b737a845fb45 100644
--- a/xmlsecurity/source/xmlsec/nss/x509certificate_nssimpl.cxx
+++ b/xmlsecurity/source/xmlsec/nss/x509certificate_nssimpl.cxx
@@ -334,7 +334,8 @@ SECKEYPrivateKey* X509Certificate_NssImpl::getPrivateKey()
 
 /* XUnoTunnel */
 sal_Int64 SAL_CALL X509Certificate_NssImpl::getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) {
-    return comphelper::getSomethingImpl(aIdentifier, this);
+    return comphelper::getSomethingImpl(
+        aIdentifier, this, comphelper::FallbackToGetSomethingOf<xmlsecurity::Certificate>{});
 }
 
 /* XUnoTunnel extension */
diff --git a/xmlsecurity/source/xmlsec/nss/x509certificate_nssimpl.hxx b/xmlsecurity/source/xmlsec/nss/x509certificate_nssimpl.hxx
index dbfb6c6b07ed..26d85a09f491 100644
--- a/xmlsecurity/source/xmlsec/nss/x509certificate_nssimpl.hxx
+++ b/xmlsecurity/source/xmlsec/nss/x509certificate_nssimpl.hxx
@@ -21,20 +21,13 @@
 
 #include <sal/config.h>
 #include <rtl/ustring.hxx>
-#include <cppuhelper/implbase.hxx>
-#include <com/sun/star/lang/XUnoTunnel.hpp>
-#include <com/sun/star/lang/XServiceInfo.hpp>
 #include <com/sun/star/security/CertificateKind.hpp>
-#include <com/sun/star/security/XCertificate.hpp>
 
 #include <certificate.hxx>
 #include <certt.h>
 #include <keythi.h>
 
-class X509Certificate_NssImpl : public ::cppu::WeakImplHelper<
-    css::security::XCertificate ,
-    css::lang::XUnoTunnel,
-    css::lang::XServiceInfo > , public xmlsecurity::Certificate
+class X509Certificate_NssImpl : public xmlsecurity::Certificate
 {
     private:
         CERTCertificate* m_pCert;