Re: lxyssl (AES binding), CFB en

[Valerio Schiavoni <valerio.schiavoni@...>]

I was using the latest released version (0.2 ?).


On Tue, Jun 8, 2010 at 11:12 PM, gary ng <garyng2000@yahoo.com> wrote:
> Ah, now I see why. The 64 bit patch is in trunk and it seems that you are
> using an earlier version(2007/10)
>
> From: Valerio Schiavoni <valerio.schiavoni@gmail.com>
> To: Lua list <lua@bazar2.conectiva.com.br>
> Sent: Tue, June 8, 2010 12:22:12 PM
> Subject: Re: lxyssl (AES binding), CFB en
>
> Hello Gary,
> finally, the problem is solved!
> The problem is in the binding code, and its use of int types.
> Using size_t resolves the bug.
> I've opened an issue and attached a patch that fixes this problem.
> http://code.google.com/p/luaxyssl/issues/detail?id=3
> Maybe this can be used for the next release of the binding.
>
> Best regards
> Valerio
> On Tue, Jun 8, 2010 at 3:47 PM, gary ng <garyng2000@yahoo.com> wrote:
>>
>> I would suggest isolate the problem to see if it is the underlying xyssl
>> or the interface. Just put some simple printf in the c wrapper after the
>> encryption.
>>
>> Another option is to check if the block mode works. I remeber I have
>> implemented the cfb mode in pure lua using the more primitive block mode.
>>
>> Unfortunately, I don't have a 64 bit machine to work with and cannot offer
>> much help.
>>
>>
>> ----- Original Message ----
>> > From: Valerio Schiavoni <valerio.schiavoni@gmail.com>
>> > To: Lua list <lua@bazar2.conectiva.com.br>
>> > Sent: Tue, June 8, 2010 6:34:31 AM
>> > Subject: Re: lxyssl (AES binding), CFB en
>> >
>> > I finally have an explanation of what it's going on here.
>>
>> I've tested the
>> > code on several architectures:
>>
>> Ubuntu 10.4 32bit
>> Ubuntu 10.4
>> > 64bit
>> Debian Lenny 32bit
>> Mac OSX 10.6.3 64bit
>>
>> And the result is
>> > always the same: it works fine on 32bit machines, it
>> doesn't work (encryption
>> > returns empty string) on 64bit machines.
>>
>> I guess to solve this problem
>> > some C hacking on the xyssl lib must be done?
>>
>> On Tue, Jun 8, 2010 at
>> > 11:54 AM, Valerio Schiavoni
>> <> ymailto="mailto:valerio.schiavoni@gmail.com";
>> > href="mailto:valerio.schiavoni@gmail.com";>valerio.schiavoni@gmail.com>
>> > wrote:
>> > Hello Gary,
>> > I reproduced your environment via a virtual
>> > machine. Installed lenny,
>> > lua 5.1.3, xyssl, lxyssl,and run.. and indeed,
>> > in this context, it
>> > works.
>> >
>> > What can be possibly be?
>> > Which are the differences between lua 5.1.3
>> > and 5.1.4 ??
>> >
>> >
>> > lua -llxyssl
>> > Lua 5.1.3  Copyright (C) 1994-2008 > href="http://Lua.org";>Lua.org,
>> > PUC-Rio
>> >>
>> > require"lxyssl"
>> >> key="abcdabcdabcdabcd"
>> >>
>> > iv=lxyssl.hash('md5'):digest(key)
>> >> print(iv)
>> >
>> > )%�,���������F
>> >> data=('a'):rep(8193)
>> >>
>> > e=lxyssl.aes(key):cfb_encrypt(data,iv)
>> >> print(#e)
>> >
>> > 8193
>> >> print(e)
>> > $�#Z_ ��Wj{V���y6���� ��:�j�
>> > d��L�������Y<�Hw�w���� ��)Mi]�ׯAA�7�+A ��
>> > ���{�W��(QP
>> >
>> >
>> >
>> > On Tue, Jun 8, 2010 at 12:34 AM,
>> > gary ng <> href="mailto:garyng2000@yahoo.com";>garyng2000@yahoo.com>
>> > wrote:
>> >>
>> >> Which is why I said, I have no idea. The
>> > following were done under linux using lua 5.1.3 and the library has been
>> > in used
>> > for quite a while. I don't have 5.1.4 on this machine(it is a debian
>> > lenny) and
>> > don't have the time to redo it(compile lua then lxyssl etc.) from
>> > scratch.
>> >>
>> >> > require'security'
>> >> >
>> > data=('a'):rep(8192)
>> >> >
>> > k=security.hash.engine('md5'):digest('abcd')
>> >> > aes_cfb =
>> > security.crypto.engine('aes_cfb',k,k)
>> >> >
>> > e=aes_cfb:encrypt(data..'a')
>> >> > print(#e)
>> >>
>> > 8193
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> > From: Valerio Schiavoni <>
>> > href="mailto:valerio.schiavoni@gmail.com";>valerio.schiavoni@gmail.com>
>> >>
>> > To: Lua list <>
>> > href="mailto:lua@bazar2.conectiva.com.br";>lua@bazar2.conectiva.com.br>
>> >>
>> > Sent: Mon, June 7, 2010 3:24:25 PM
>> >> Subject: Re: lxyssl (AES
>> > binding), CFB en
>> >>
>> >> Well:
>> >> Lua 5.1.4  Copyright
>> > (C) 1994-2008 Lua.org, PUC-Rio
>> >> > require"security"
>> >>
>> > > data=('a'):rep(8192)
>> >> > k =
>> > security.hash.engine('md5'):digest('abcd')
>> >> > print(k)
>> >>
>> > ??qLG'?$?.3
>> >> > aes_cfb = security.crypto.engine('aes_cfb', k,
>> > k)
>> >> > e=aes_cfb:encrypt(data.."a")
>> >> >
>> > print(e)
>> >> > print(#e)
>> >> 0
>> >> I don't
>> > understand..
>> >>
>> >
>>
>>
>>
>
>
>