[MPlayer-dev-eng] Zattoo, AES, avutil

[Vladimir Serbinenko]

I already found suficient information about oaep and ready to implement
it as soon as SHA1 is ok, ideally commited. Same thing with RSA
including key generation
Vladimir 'phcoder' Serbinenko
Ilja Kamps a écrit :
> On Mon, Mar 12, 2007 at 07:02:49PM +0100, Michael Niedermayer wrote:
>   
>> Hi
>>
>> On Mon, Mar 12, 2007 at 05:11:41PM +0100, Ilja Kamps wrote:
>>     
>>> On Sun, Mar 11, 2007 at 10:03:16PM +0100, Michael Niedermayer wrote:
>>>       
>>>> Hi
>>>>
>>>> On Sun, Mar 11, 2007 at 09:16:06PM +0100, Reimar D?ffinger wrote:
>>>>         
>>>>> Hello,
>>>>> On Sun, Mar 11, 2007 at 08:58:34PM +0100, Michael Niedermayer wrote:
>>>>>           
>>>>>> On Sun, Mar 11, 2007 at 05:31:47PM +0100, Vladimir Serbinenko wrote:
>>>>>>             
>>>>>>> It's problematic to use AES from libavutil because it doesn't support
>>>>>>> padding and padding is necessary for zattoo
>>>>>>>               
>>>>>> well so add 3 lines of c code to your zatoo code to pad the last
>>>>>> block
>>>>>>             
>>>>> He is talking about OEAP, for which there only seems to be only the overly
>>>>> complicated and incorrect mathematical paper http://www-cse.ucsd.edu/users/mihir/papers/oae.pdf
>>>>> and some similarly overly complicated code as documentation.
>>>>>           
>>>> hmm, then why dont you (or the author of the patch) explains it in a 
>>>> few words?
>>>>
>>>>
>>>>         
>>>>> It at least needs a SHA-implementation though.
>>>>>           
>>>> so from all the tiny fragments of information on the ML it seems we need 
>>>> a SHA-1 and a RSA implementation?
>>>> which then somehow get connected ...
>>>>
>>>>         
>>> SHA1 isn't much, see attached file
>>>       
>> RSA isnt more either ...
>>
>> anyway both RSA and SHA-1 should be added to libavutil, but these must be
>> clean, small, simple and fast implementations ...
>>
>> the one below fails in clean and small but can certainly serve as a starting
>> point for a nicer implementation
>> the most obvious problem it has is the use of macros and manually unroled
>> loops instead of inline functions and normal for()
>> the rest is simple plain stupidity, like writing to variables which are
>> never read afterwards and doing otherwise silly things ...
>>
>> [...]
>>
>>     
>
> Agreed, it could take some work to clean up further, I just did it to
> the point where I could actually use it in another project, I actually
> have a public domain RSA implementation aswell somewhere, but I couldn't 
> find it.
>
> Actually I think all this crypto stuff is also in gnutls or some
> similair GNU project, so you could use that or code from that.
>   
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