Re: [Valgrind-users] SSL problems

[Crispin F. <cr...@th...>]

On Fri, 2003-05-23 at 17:57, Steve G wrote:
> >This is a known problem in openssl. It uses uninitialzed 
> >data to generate random numbers.
> 
> Right, but is that a transferable property? I think this is
> something different. The call chain I posted is the
> RC4_key_set call.

Valgrind keeps track of which bytes (bits?) of memory are initialised
and complains when you use them (system call, conditional jump etc). I
suggest you read the stuff about the memcheck skin at:

http://devel-home.kde.org/~sewardj/docs-1.9.5/mc_main.html#errormsgs

which explains when the error messages are printed (hint, you can copy
bogus data around all you want)

As an aside, you can fix the problem by adding a call to 

VALGRIND_MAKE_READABLE( ptr, len )

after the call to RAND_Bytes and your errors will go away.

Crispin