[tor-bugs] #15539 [Tor bundles/installation]: Removing signature on Tor Browser .exe should result in SHA256 value listed in sha256sums.txt

Tor Bug Tracker & Wiki blackhole at torproject.org
Thu Apr 2 08:42:53 UTC 2015


#15539: Removing signature on Tor Browser .exe should result in SHA256 value listed
in sha256sums.txt
------------------------------------------+-----------------
     Reporter:  gk                        |      Owner:  gk
         Type:  defect                    |     Status:  new
     Priority:  normal                    |  Milestone:
    Component:  Tor bundles/installation  |    Version:
   Resolution:                            |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |
------------------------------------------+-----------------

Comment (by cypherpunks):

 NSIS and checksum:
 {{{
   // No check sum support yet...
   DWORD* pdwCheckSum =
 GetMemberFromOptionalHeader(m_ntHeaders->OptionalHeader, CheckSum);
   if (*pdwCheckSum)
   {
     // clear checksum (should be [re]calculated after all changes done)
     pdwCheckSum = 0;
     //throw runtime_error("CResourceEditor doesn't yet support check
 sum");
   }
 }}}
 Found only one place where it tries to change checksum, where is
 "[re]calculated after all changes done" then? It's not even right code
 then, it clears pointer to DWORD with checksum (why?). If to truncate
 stuff they appends to PE-file then checksum value from generated exe is
 not random for sure but not real one again.
 Have no resources to compile it either for tests.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15539#comment:7>
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