4 ms·
Pulling JPEGs out of thin air (2014)
- piinbinary 8y agoThat could make an interesting piece of art
- k9wolf 8y agoQuite abstract art but true, interesting how that happens
- lachenmayer 8y agoReally cool! I recently happened to have a similar idea when I came across the rust-fuzz crate, which abstracts over afl, honggfuzz etc. If you're interested, my notes are here: https://github.com/lachenmayer/insta-fuzz https://github.com/lachenmayer/insta-fuzz I ended up "cheating" a little bit by providing a valid JPEG header - I found that rust-fuzz seemed to take far too long to generate any valid JPEG at all by starting from eg. an empty file. But maybe I just wasn't patient enough, after all I was only running it on my laptop :)
- stordoff 8y agoThe author does note in the comments: > Note that by default, afl-fuzz runs on a single core, so it may take several days to get results
- yjftsjthsd-h 8y agoThat's a little annoying, but it looks like it's not too terrible to fix: https://github.com/mirrorer/afl/blob/master/docs/parallel_fuzzing.txt https://github.com/mirrorer/afl/blob/master/docs/parallel_fu...
- Cthulhu_ 8y agoWould a BMP be easier to generate? I'm sure you'd get 99.99% static though.
- lachenmayer 8y agoYeah definitely, a BMP doesn't really have any "interesting" structure though because it's more or less just an array of pixels. The visual artifacts in JPEG files come from all the downsampling / blocks / cosine transform stuff which is really what I wanted to explore.
- Twirrim 8y agoI've used this in the past (inspired by this) to produce some valid json. Of course, a jpeg is at least pretty. Valid JSON is still just boring old JSON.
- nomadiccoder 8y agoWhy do some websites eternally not let you back to the previous page when clicking the back button?
- OrgNet 8y agonot sure, but maybe they wanna see how long it takes you to long-click the back button...
- hannob 8y agoIt's a redirect. The link goes to the HTTP version of blogspot. This redirects you to HTTPS. If you click "back" you are back at the HTTP version, which will redirect you again. Yeah, browsers could be smarter about this.
- jorams 8y ago> Yeah, browsers could be smarter about this I'm not sure they could. If the http:// http:// URL would have responded with a redirect to https:// https://, the back button would have worked just fine. Instead it responds with a perfectly normal page that then does this: if (location.protocol == 'http:') location.protocol = 'https:'; Blogspot is such a mess, it's the perfect example of Google not necessarily being technically competent.
- Cthulhu_ 8y agoYeah that should be a proper permanent redirect on a webserver level. Did Google make Blogspot themselves or did they buy it and never made it conform to normal web page practices?
- tsukurimashou 8y agoGoogle bought Blogger in 2003, Blogger was launched in 1999
- Double_a_92 8y agoWhere did it get that "Hello Kitty" image from?