dtrx VS hyperscan

For years and years I've used `dtrx` ("do the right extraction") (https://github.com/dtrx-py/dtrx/). Maybe I should switch to unblob?

It looks like unblob has the right behavior by default that I have to alias for `dtrx`:

alias dtrx='dtrx --one=inside'

But I'll probably want to create an alias for unblob to change default depth to 1.

Maybe some other PCRE-compatible implementation offers streaming. For instance, https://www.intel.com/content/www/us/en/developer/articles/t... says it has this feature, but of course given who it's from it may be tied to a single brand of CPU.

github seems to be https://github.com/intel/hyperscan

I think of WAFs as an extra safety net. Defense in depth.

The author complained about the performance cost of WAFs in general, but not all WAFs have be structured like ModSecurity. They could for example be based on something like https://github.com/intel/hyperscan and perf is at a very different level.

Another example of old timey Unix code just breaking things in minor point releases. See https://abi-laboratory.pro/index.php?view=changelog&l=glibc&... and https://github.com/intel/hyperscan/issues/359.

It’s a bespoke scanning setup designed to deal with GitHub’s scale. Under the hood it’s using Intel’s hyperscan as the regex engine.

https://github.com/intel/hyperscan

Hyperscan is an Intel regular expression library.

We are using hyperscan [3] instead of grepping byte sequences with Python, which is orders of magnitudes faster. It can also handle 4Gb+ files because of this which binwalk cannot.

It's used for a year now in production and it's way more precise and faster than binwalk. We are getting less false-positives too, and even if unblob fails to extract everything, we still get meaningful information out of firmwares, where binwalk just failed with no output previously.

[1]: https://github.com/onekey-sec/unblob/blob/main/unblob/handle...

[2]: https://github.com/onekey-sec/unblob/blob/main/unblob/proces...

[3]: https://github.com/intel/hyperscan