Re: [Geotools-gt2-users] GeoTiffReader and Encrypted Image

[mj <mj...@ya...>]

Simone Giannecchini ha scritto:
> Ciao mj,
> well if the question is if it possible to decrypt a geotiff on the fly
> using the actual GeoTiffReader (2.3.x and above) the answer is yeah
> (ok, I have to check but I am pretty positive :-) ). You would have to
> create your own ImageInputStream outside the reader  using a
> CypherInputStream.
>
> However the point here is not the GeoTiffReader but how ImageIO
> manages stream. It has its own stack of streams implementing the
> ImageInputStream interface, hence the best thing to do would be
> writing a dedicate ImageInputStream that uses the decorator
> pattern (much like FilterInputStream) to decrypt the image on the fly
> with highest performances. Once we are there we could even do the
> converse that is writing an ImageOutputStream that does the opposite.
> If you are interested we can find a way to implement this pretty
> quickly.
>
>
> Regards,
> Simone.
>
>
>
>
> On 11/13/06, mj <mj...@ya...> wrote:
>> Hello,
>> I encrypted a Image with javax.crypto, is possible  pass to the
>> GeoTiffReader a Cipher class to decrypt the image.
>>
>> Thanks
>>
>> Mario
>>
>>
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>
>
Ciao,
yes I am interessed in an ImageInputStream /ImageOutputStream  for teh 
encryption/decryption of images.
How I can contribute to help you?.

Regards

Mario