BSD, Ruby, Rust, Rambling
An async Rust SSH tarpit
tarssh is an SSH tarpit — a server that trickles an endlessly repeating introductory
banner to clients for as long as it remains connected, in order to expend the resources
of attackers.
It's based on the same concept as Chris Wellons' Endlessh, a similar service written in C.
Continue ReadingCount Words - a Rust wc implementation
cw is a fast Rust reimplementation of the classic Unix wc command, featuring
fast paths for most common modes of operation, including SIMD-accelerated line
and UTF-8 codepoint counting via the
bytecount crate (closing issue
#41 there in the process).
It also supports multithreading, because of course it does.
Even in single-threaded mode it is almost always much faster than either FreeBSD
or GNU wc implementations.
Email Sucks Completely
esc is an embryonic email search tool, in the spirit of notmuch, built on
top of Tantivy and mailparse.
It can index my 2 million emails in about 3 minutes flat. Which is good, because it doesn't have any efficient re-indexing support.
Rust-style monotonic clocks in Ruby
Monotime offers an alternative to the typical method of monotonic timekeeping
in Ruby:
# Bog standard Ruby start = Process.clock_gettime(Process::CLOCK_MONOTONIC) do_something elapsed = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start # With monotime require 'monotime' include Monotime start = Instant.now do_something elapsed = start.elapsed # or elapsed = Duration.measure { do_something }
It's less fiddly, and uses proper types wrapping elapsed times in nanoseconds, which is about as close to the native representations as Ruby gets.
Continue ReadingWriting the same small program in two different languages.
I've been doing a fair bit of Rust lately. Honestly, I haven't been so smitten with a language since I started writing Ruby back in 1999.
Rust is many of the things Ruby isn't—precompiled, screaming fast, meticulously efficient, static, explicit, type-safe. But it's also expressive and, above all, fun. I think this rare mix makes it a good companion language for Ruby developers, particularly with things like Helix and rutie making it easy to bridge the two.
The best way of learning is by doing, so why not avoid that and just read about me doing something instead?
Continue ReadingCommand-line password generation
mkpass is a simple command-line random password generator written in Rust,
with built-in dictionaries to keep run-time dependencies to an absolute minimum.
Relative Timestamps for Stuff
rtss annotates its output with relative durations between consecutive lines
and since program start.
Inspired by Kevin Burke's Golang tss,
I thought it would be a fun exercise and a nice bit of Rust practice to
implement something similar.
I'm fairly pleased with the result - it's considerably faster, running at hundreds
of MB per second in my tests - and somewhat more featureful, including pty support,
allowing it to work similarly to expect's unbuffer command.
Bit-level Rust IO
bitrw offers bit-level reading and writing for Rust Read and Write types.
It was extracted from my gcstool project.
A fast Rust line reader
LineReader is a high-performance Rust byte-delimited reader, designed to minimise copying while maintaining a convenient API.
Continue ReadingEfficient set membership with Golomb Compressed Sets
Similar to Bloom Filters, Golomb Compressed sets allow for space-efficient probablistic storage of sets. In other words, you can ask a GCS if it's seen an object, and retrieve either "absolutely not" or "probably not" in response.
gcstool was my first Rust project, developed primarily to play about with the haveibeenpwned.com pwned-passwords-2.0.txt database. It can store all half a billion items with a false-positive rate of 1-in-50 million in just 1.6GB, importing them in just a few minutes, though with fairly high memory requirements.
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