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file mode 100644 index 0000000..73e9a24 --- /dev/null +++ b/Readme.md @@ -0,0 +1,11 @@ +# base-keysmash + +the implementation is sloppy and cursed, but honestly, what did you expect? + +~~~shell +> echo "you're cute!" > base_keysmash +adfsfkeidlfjljshdeljthoskishdhhjdhljlssstsasksjhkhihakk +~~~ + +With thanks to [May's talk at emf 2022](https://media.ccc.de/v/emf2022-237-asdkfldsalkasdf-keysmashes-sexuality) +and Gretchen McCulloch's *Because Internet: Understanding the New Rules of Language*. diff --git a/cli/Cargo.toml b/cli/Cargo.toml new file mode 100644 index 0000000..8ab1a10 --- /dev/null +++ b/cli/Cargo.toml @@ -0,0 +1,10 @@ +[package] +name = "base-keysmash-cli" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +base-keysmash = { path = "../lib" } +clap = { version = "4.4", features = [ "derive" ] } diff --git a/cli/src/main.rs b/cli/src/main.rs new file mode 100644 index 0000000..77c56de --- /dev/null +++ b/cli/src/main.rs @@ -0,0 +1,28 @@ + +use clap::Parser; +use std::io::BufRead; +use std::io::Write; + +#[derive(Parser, Debug)] +struct Args { + #[arg(short)] + decode: bool +} + + +fn main() { + let args = Args::parse(); + + let mut stdin = std::io::stdin().lock(); + let mut input = Vec::new(); + stdin.read_until(0, &mut input).unwrap(); + + let output = if args.decode { + let input = input.into_iter().filter(|s| s.is_ascii() && !s.is_ascii_whitespace()).collect::>(); + base_keysmash::decode(&input[..]) + } else { + base_keysmash::encode(&input) + }; + + std::io::stdout().lock().write_all(&output).unwrap(); +} diff --git a/lib/Cargo.toml b/lib/Cargo.toml new file mode 100644 index 0000000..904ad4d --- /dev/null +++ b/lib/Cargo.toml @@ -0,0 +1,9 @@ +[package] +name = "base-keysmash" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +fastrand = "2.0" diff --git a/lib/src/lib.rs b/lib/src/lib.rs new file mode 100644 index 0000000..a8d48b6 --- /dev/null +++ b/lib/src/lib.rs @@ -0,0 +1,92 @@ + + +const HEADERS: [&[u8]; 3] = [b"asd", b"adf", b"ads"]; +const HOME_RIGHT: [u8; 4] = [b'a',b's',b'd',b'f']; +const HOME_LEFT: [u8; 4] = [b'h',b'j',b'k',b'l']; +const ABOVE_RIGHT: [u8; 4] = [b'w',b'e',b'r',b't']; +const ABOVE_LEFT: [u8; 4] = [b'u',b'i',b'o',b'p']; + +pub fn encode(buf: &[u8]) -> Vec { + let mut out = Vec::new(); + + let h = HEADERS[fastrand::usize(..HEADERS.len())]; + for s in h { + out.push(*s); + } + + + for byte in buf { + let stuff = encode_byte(*byte); + for b in stuff { + out.push(b); + } + } + out +} + +fn encode_byte(byte: u8) -> [u8; 4] { + [some_dict()[((byte & 0b11000000) >> 6) as usize], + some_dict()[((byte & 0b00110000) >> 4) as usize], + some_dict()[((byte & 0b00001100) >> 2) as usize], + some_dict()[(byte & 0b00000011) as usize] + ] +} + +fn some_dict() -> &'static [u8; 4] { + let q = fastrand::usize(0..10); + if q < 4 { + return &HOME_RIGHT + } + if q < 8 { + return &HOME_LEFT + } + if q < 9 { + return &ABOVE_RIGHT + } + return &ABOVE_LEFT +} + +pub fn decode(buf: &[u8]) -> Vec { + let buf = &buf[3..]; + + let mut out = Vec::new(); + for pair in buf.chunks(4) { + out.push((decode_sym(pair[0]) << 6) + + (decode_sym(pair[1]) << 4) + + (decode_sym(pair[2]) << 2) + + decode_sym(pair[3])); + } + out +} + +pub fn decode_sym(sym: u8) -> u8 { + let find = |d: &[u8; 4]| -> Option { + d.iter().enumerate().find(|s| s.1 == &sym).map(|s| s.0 as u8) + }; + find(&HOME_RIGHT) + .or_else(|| find(&HOME_LEFT)) + .or_else(|| find(&ABOVE_RIGHT)) + .or_else(|| find(&ABOVE_LEFT)) + .unwrap() +} + + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn it_works() { + let hello = b"hello, world!"; + assert_eq!(&hello[..], &decode(&encode(hello))); + } + + #[test] + fn random() { + for _ in 0..1000 { + let mut buf = vec![0; fastrand::usize(..1000)]; + buf.iter_mut().for_each(|s| *s = fastrand::u8(..)); + assert_eq!(&buf[..], &decode(&encode(&buf))); + } + } +} -- cgit v1.2.3