[oss] [Assignment 1] [Task 1] no m32 compilation flag

[Vlad Dumitrescu]

On Tue, Nov 11, 2014 at 1:42 AM, Lucian Mogosanu
<lucian.mogosanu at gmail.com> wrote:
> On Tue, Nov 11, 2014 at 08:57:02AM +0000, Razvan Nitu wrote:
>> Hello all,
>>
>> When I tried to run the hasher binary I got this error [1]. I recompiled, but
>> i received [2]. I figured it might be the fact that I don't have the 32-bit
>> library so I compiled everything without the -m32 flag and everything worked
>> fine. I think that this might cause some issues if the script contains
>> breakpoints at hardcoded addresses. This leads me to my second question: can
>> we assume that ASLR is disabled ?
>>
>> Razvan
>>
>>
>> [1] ./hasher: error while loading shared libraries: libcrypto.so.1.0.0:
>> cannot open shared object file: No such file or directory
>>
>> [2] In file included from /usr/include/openssl/sha.h:63:0,
>>                  from hasher.c:1:
>> /usr/include/openssl/e_os2.h:56:33: fatal error: openssl/opensslconf.h: No
>> such file or directory
>>  #include <openssl/opensslconf.h>
>
> The files you are looking for are in the libssl1.0.0 and libssl-dev libraries:
>
> spyked at tuvok:~% apt-file search opensslconf.h
> libcyassl-dev: /usr/include/cyassl/openssl/opensslconf.h
> libssl-dev: /usr/include/x86_64-linux-gnu/openssl/opensslconf.h
>
> (obviously you need libssl-dev:i386 if you are going to compile with m32)
>
> spyked at tuvok:~% apt-file search libcrypto.so.1.0.0
> libssl1.0.0: /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
>
> (same here, you need libssl1.0.0:i386)

Lucian is correct. Please install libssl-dev:i386 (it will also
install libssl) as mentioned in the assignment wiki text.

You should not care about ASLR for this task. There is a way to solve
it without breaking into library code.

Vlad