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Thread: archive file in image

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    galaxyAbstractor's Avatar
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    archive file in image

    I made an app in java to hide an zip/rar in a jpg/png image. Now I want to reverse it, but then I need to find out if there is an archive in the image the user inputs.

    Any ideas on how I could check this?

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    ichwar's Avatar
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    Re: archive file in image

    Ohoh. Are you taking to planting trojans in people's PCs? :D

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    Re: archive file in image

    Quote Originally Posted by ichwar View Post
    Ohoh. Are you taking to planting trojans in people's PCs? :D
    No :eek4:. A zip/rar archive can't be run

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    Re: archive file in image

    Quote Originally Posted by vigge_sWe View Post
    No :eek4:. A zip/rar archive can't be run
    Of course not, but it can contain several MB of data that can be run by a 5k .exe

    I was teasing you though. I know you wouldn't be doing that. :hahano:

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    Re: archive file in image

    well there's some auto-extract archives...
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    Re: archive file in image

    Quote Originally Posted by xav0989 View Post
    well there's some auto-extract archives...
    but you can't place that in an image xD. Only normal rar/zip files works, otherwise the file gets broken

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    Re: archive file in image

    Quote Originally Posted by vigge_sWe View Post
    I need to find out if there is an archive in the image the user inputs.
    Are you talking about steganography detection? Check out stegdetect or StegAlyzerSS.
    Be sure to read all pages linked in this post; they have further information that should prove useful. When asking for help, make sure you follow Eric Raymond's and Jon Skeet's guidelines for prompt, accurate responses. Please answer any questions I ask; they're not rhetorical (probably). Any posted code is intended as illustrative example, rather than a solution to your problem to be copied without alteration. Study it to learn how to write your own solution.
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    Re: archive file in image

    Quote Originally Posted by misson View Post
    Are you talking about steganography detection? Check out stegdetect or StegAlyzerSS.
    Maybe.

    The first only works with JPEG images, the other isn't free

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    Re: archive file in image

    Quote Originally Posted by vigge_sWe View Post
    Maybe.

    The first only works with JPEG images, the other isn't free
    Looks like you'll have to code it yourself! have fun! ;)
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    Re: archive file in image

    I think it would be of a lot of use if you mentioned how you stored that archive in that image :p
    If you want to reverse it you'll probably be basing yourself on the original encryption code too...
    (I'll subscribe to this topic so it won't take over a week to get response this time (a))

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