From 1dc71daf7fa7204a98c75dac680af664ab9c8edb Mon Sep 17 00:00:00 2001 From: Samuel Mehrbrodt Date: Mon, 18 Jan 2021 15:24:48 +0100 Subject: Improve macro checks Change-Id: Ie40801df8866b52c1458e020ffa9cba120720af7 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/109552 Tested-by: Jenkins Reviewed-by: Thorsten Behrens --- include/sfx2/docmacromode.hxx | 7 +++++-- include/svtools/sfxecode.hxx | 1 + sfx2/source/doc/docmacromode.cxx | 23 +++++++++++++++++++---- sfx2/source/doc/objmisc.cxx | 5 +++-- svtools/inc/errtxt.hrc | 1 + 5 files changed, 29 insertions(+), 8 deletions(-) diff --git a/include/sfx2/docmacromode.hxx b/include/sfx2/docmacromode.hxx index 9533518bee9d..aa120240688e 100644 --- a/include/sfx2/docmacromode.hxx +++ b/include/sfx2/docmacromode.hxx @@ -220,7 +220,8 @@ namespace sfx2 if and only if macro execution in this document is allowed. */ bool adjustMacroMode( - const css::uno::Reference< css::task::XInteractionHandler >& _rxInteraction + const css::uno::Reference< css::task::XInteractionHandler >& _rxInteraction, + bool bHasValidContentSignature = false ); /** determines whether macro execution is disallowed @@ -286,11 +287,13 @@ namespace sfx2 */ bool checkMacrosOnLoading( - const css::uno::Reference< css::task::XInteractionHandler >& _rxInteraction + const css::uno::Reference< css::task::XInteractionHandler >& _rxInteraction, + bool bHasValidContentSignature = false ); private: std::shared_ptr< DocumentMacroMode_Data > m_xData; + bool m_bNeedsContentSigned; }; diff --git a/include/svtools/sfxecode.hxx b/include/svtools/sfxecode.hxx index a57c6b9e966f..fe6f26dc3623 100644 --- a/include/svtools/sfxecode.hxx +++ b/include/svtools/sfxecode.hxx @@ -36,6 +36,7 @@ class ErrCode; #define ERRCODE_SFX_CANTCREATEBACKUP ErrCode(ErrCodeArea::Sfx, ErrCodeClass::Create, 50) #define ERRCODE_SFX_MACROS_SUPPORT_DISABLED ErrCode(WarningFlag::Yes, ErrCodeArea::Sfx, ErrCodeClass::NONE, 51) #define ERRCODE_SFX_DOCUMENT_MACRO_DISABLED ErrCode(WarningFlag::Yes, ErrCodeArea::Sfx, ErrCodeClass::NONE, 52) +#define ERRCODE_SFX_DOCUMENT_MACRO_DISABLED_CONTENT_UNSIGNED ErrCode(WarningFlag::Yes, ErrCodeArea::Sfx, ErrCodeClass::NONE, 53) #define ERRCODE_SFX_SHARED_NOPASSWORDCHANGE ErrCode(WarningFlag::Yes, ErrCodeArea::Sfx, ErrCodeClass::NONE, 54) #define ERRCODE_SFX_INCOMPLETE_ENCRYPTION ErrCode(WarningFlag::Yes, ErrCodeArea::Sfx, ErrCodeClass::NONE, 55) #define ERRCODE_SFX_DOCUMENT_MACRO_DISABLED_MAC \ diff --git a/sfx2/source/doc/docmacromode.cxx b/sfx2/source/doc/docmacromode.cxx index bbb3b629de2b..c49f7cec00c6 100644 --- a/sfx2/source/doc/docmacromode.cxx +++ b/sfx2/source/doc/docmacromode.cxx @@ -111,6 +111,10 @@ namespace sfx2 #endif } + void lcl_showMacrosDisabledUnsignedContentError( const Reference< XInteractionHandler >& rxHandler, bool& rbAlreadyShown ) + { + lcl_showGeneralSfxErrorOnce( rxHandler, ERRCODE_SFX_DOCUMENT_MACRO_DISABLED_CONTENT_UNSIGNED, rbAlreadyShown ); + } bool lcl_showMacroWarning( const Reference< XInteractionHandler >& rxHandler, const OUString& rDocumentLocation ) @@ -123,7 +127,8 @@ namespace sfx2 //= DocumentMacroMode DocumentMacroMode::DocumentMacroMode( IMacroDocumentAccess& rDocumentAccess ) - :m_xData( std::make_shared( rDocumentAccess ) ) + :m_xData( std::make_shared( rDocumentAccess ) ), + m_bNeedsContentSigned(false) { } @@ -139,7 +144,7 @@ namespace sfx2 return false; } - bool DocumentMacroMode::adjustMacroMode( const Reference< XInteractionHandler >& rxInteraction ) + bool DocumentMacroMode::adjustMacroMode( const Reference< XInteractionHandler >& rxInteraction, bool bHasValidContentSignature ) { sal_uInt16 nMacroExecutionMode = m_xData->m_rDocumentAccess.getCurrentMacroExecMode(); @@ -237,6 +242,14 @@ namespace sfx2 lcl_showDocumentMacrosDisabledError(rxInteraction, m_xData->m_bDocMacroDisabledMessageShown); return disallowMacroExecution(); } + else if ( m_xData->m_rDocumentAccess.macroCallsSeenWhileLoading() && + bHasTrustedMacroSignature && + !bHasValidContentSignature) + { + // When macros are signed, and the document has events which call macros, the document content needs to be signed too. + lcl_showMacrosDisabledUnsignedContentError(rxInteraction, m_xData->m_bDocMacroDisabledMessageShown); + return disallowMacroExecution(); + } else if ( bHasTrustedMacroSignature ) { // there is trusted macro signature, allow macro execution @@ -391,7 +404,7 @@ namespace sfx2 } - bool DocumentMacroMode::checkMacrosOnLoading( const Reference< XInteractionHandler >& rxInteraction ) + bool DocumentMacroMode::checkMacrosOnLoading( const Reference< XInteractionHandler >& rxInteraction, bool bHasValidContentSignature ) { bool bAllow = false; if ( SvtSecurityOptions().IsMacroDisabled() ) @@ -403,7 +416,9 @@ namespace sfx2 { if (m_xData->m_rDocumentAccess.documentStorageHasMacros() || hasMacroLibrary() || m_xData->m_rDocumentAccess.macroCallsSeenWhileLoading()) { - bAllow = adjustMacroMode( rxInteraction ); + if (m_xData->m_rDocumentAccess.macroCallsSeenWhileLoading()) + m_bNeedsContentSigned = true; + bAllow = adjustMacroMode( rxInteraction, bHasValidContentSignature ); } else if ( !isMacroExecutionDisallowed() ) { diff --git a/sfx2/source/doc/objmisc.cxx b/sfx2/source/doc/objmisc.cxx index 81fcb4027535..5148ed0c62b6 100644 --- a/sfx2/source/doc/objmisc.cxx +++ b/sfx2/source/doc/objmisc.cxx @@ -942,7 +942,8 @@ void SfxObjectShell::CheckSecurityOnLoading_Impl() CheckEncryption_Impl( xInteraction ); // check macro security - pImpl->aMacroMode.checkMacrosOnLoading( xInteraction ); + const bool bHasValidContentSignature = HasValidSignatures(); + pImpl->aMacroMode.checkMacrosOnLoading( xInteraction, bHasValidContentSignature ); } @@ -1598,7 +1599,7 @@ bool SfxObjectShell::AdjustMacroMode() CheckEncryption_Impl( xInteraction ); - return pImpl->aMacroMode.adjustMacroMode( xInteraction ); + return pImpl->aMacroMode.adjustMacroMode( xInteraction, true /*TODO*/ ); } vcl::Window* SfxObjectShell::GetDialogParent( SfxMedium const * pLoadingMedium ) diff --git a/svtools/inc/errtxt.hrc b/svtools/inc/errtxt.hrc index 9847148d4c3d..009badd70b54 100644 --- a/svtools/inc/errtxt.hrc +++ b/svtools/inc/errtxt.hrc @@ -119,6 +119,7 @@ const ErrMsgCode RID_ERRHDL[] = { NC_("RID_ERRHDL", "The maximum number of documents that can be opened at the same time has been reached. You need to close one or more documents before you can open a new document."), ERRCODE_SFX_NOMOREDOCUMENTSALLOWED }, { NC_("RID_ERRHDL", "Could not create backup copy.") , ERRCODE_SFX_CANTCREATEBACKUP }, { NC_("RID_ERRHDL", "An attempt was made to execute a macro.\nFor security reasons, macro support is disabled."), ERRCODE_SFX_MACROS_SUPPORT_DISABLED }, + { NC_("RID_ERRHDL", "Execution of macros is disabled. Macros are signed, but the document (containing document events) is not signed."), ERRCODE_SFX_DOCUMENT_MACRO_DISABLED_CONTENT_UNSIGNED }, { NC_("RID_ERRHDL", "This document contains macros.\n\nMacros may contain viruses. Execution of macros is disabled due to the current macro security setting in %PRODUCTNAME - Preferences - %PRODUCTNAME - Security.\n\nTherefore, some functionality may not be available.") , ERRCODE_SFX_DOCUMENT_MACRO_DISABLED_MAC }, { NC_("RID_ERRHDL", "This document contains macros.\n\nMacros may contain viruses. Execution of macros is disabled due to the current macro security setting in Tools - Options - %PRODUCTNAME - Security.\n\nTherefore, some functionality may not be available.") , ERRCODE_SFX_DOCUMENT_MACRO_DISABLED }, { NC_("RID_ERRHDL", "The encrypted document contains unexpected non-encrypted streams.\n\nThis could be the result of document manipulation.\n\nWe recommend that you do not trust the content of the current document.\nExecution of macros is disabled for this document.\n ") , ERRCODE_SFX_INCOMPLETE_ENCRYPTION }, -- cgit v1.2.3