[Libreoffice-commits] core.git: Branch 'libreoffice-5-4' - xmlsecurity/source

[Katarina Behrens]

 xmlsecurity/source/gpg/xmlsignature_gpgimpl.cxx |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

New commits:
commit d54e3f4af4696f5b47d13c2e768356532887f181
Author: Katarina Behrens <Katarina.Behrens at cib.de>
Date:   Fri Jul 14 14:03:31 2017 +0200

    gpg4libre: Don't use xmlStrlen on binary data
    
    Odd things happen inside gpgme if the buffer is prematurely
    truncated due to \n char and valid signature is then evaluated
    as invalid
    
    Change-Id: I24d4d22af06a3dde6eb7fdfc12953cf1b5f19c1e
    Reviewed-on: https://gerrit.libreoffice.org/39947
    Tested-by: Jenkins <ci at libreoffice.org>
    Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt at cib.de>

diff --git a/xmlsecurity/source/gpg/xmlsignature_gpgimpl.cxx b/xmlsecurity/source/gpg/xmlsignature_gpgimpl.cxx
index 1667af6f59ad..0700c43f1ea6 100644
--- a/xmlsecurity/source/gpg/xmlsignature_gpgimpl.cxx
+++ b/xmlsecurity/source/gpg/xmlsignature_gpgimpl.cxx
@@ -359,12 +359,13 @@ SAL_CALL XMLSignature_GpgImpl::validate(
         if(!xmlSecCheckNodeName(cur, xmlSecNodeSignatureValue, xmlSecDSigNs))
             throw RuntimeException("The GpgME library failed to initialize for the OpenPGP protocol.");
         xmlChar* pSignatureValue=xmlNodeGetContent(cur);
-        if(xmlSecBase64Decode(pSignatureValue, reinterpret_cast<xmlSecByte*>(pSignatureValue), xmlStrlen(pSignatureValue)) < 0)
+        int nSigSize = xmlSecBase64Decode(pSignatureValue, reinterpret_cast<xmlSecByte*>(pSignatureValue), xmlStrlen(pSignatureValue));
+        if( nSigSize < 0)
             throw RuntimeException("The GpgME library failed to initialize for the OpenPGP protocol.");
 
         GpgME::Data data_signature(
             reinterpret_cast<char*>(pSignatureValue),
-            xmlStrlen(pSignatureValue), false);
+            nSigSize, false);
 
         GpgME::VerificationResult verify_res=rCtx.verifyDetachedSignature(
             data_signature, data_text);