supleed2/namehash-rs
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Basic version of program, 1 namehash at a time
This commit is contained in:
Aadi Desai 2023-05-07 17:31:17 +01:00
commit f851cd71be
Signed by: supleed2
SSH key fingerprint: SHA256:CkbNRs0yVzXEiUp2zd0PSxsfRUMFF9bLlKXtE1xEbKM
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1
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/target

343
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Cargo.toml Normal file
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[package]
name = "namehash"
version = "0.1.0"
edition = "2021"
description = "CLI program for hashing domain names according to EIP-137"
homepage = "https://github.com/supleed2/namehash-rs"
license = "Apache-2.0"
repository = "https://github.com/supleed2/namehash-rs"
# documentation = ""
# keywords = []
# categories = []
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
clap = { version = "4.2.7", features = ["derive"] }
hex = "0.4.3"
tiny-keccak = { version = "2.0.2", features = ["keccak"] }

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src/main.rs Normal file
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// use std::path::PathBuf;
use clap::{Parser, Subcommand};
#[derive(Parser)]
struct Cli {
#[command(subcommand)]
command: Commands,
}
#[derive(Subcommand)]
enum Commands {
/// Get the namehash of a single domain
Domain {
/// Domain to get namehash of
domain: String,
},
// /// Get the namehashes of many domains at once, THIS COMMAND IS INCOMPLETE
// File {
// /// Path to input file, domains to hash with 1 per line
// input: PathBuf,
// /// File to save hashes to, stdout if not given
// #[arg(short, long, value_name = "FILE")]
// output: Option<PathBuf>,
// },
}
fn main() {
match Cli::parse().command {
Commands::Domain { domain } => println!("{domain}: 0x{}", hex::encode(namehash(&domain))),
// Commands::File { input, output } => match output {
// None => println!(
// "Hashing domains in {}, output to stdout, THIS COMMAND IS INCOMPLETE",
// input.display()
// ),
// Some(output) => println!(
// "Hashing domains in {}, output to {}, THIS COMMAND IS INCOMPLETE",
// input.display(),
// output.display()
// ),
// },
}
}
fn keccak256(bytes: &[u8]) -> [u8; 32] {
use tiny_keccak::{Hasher, Keccak};
let mut hasher = Keccak::v256();
hasher.update(bytes);
let mut hash = [0u8; 32];
hasher.finalize(&mut hash);
hash
}
fn namehash(name: &str) -> Vec<u8> {
if name.is_empty() {
return vec![0u8; 32];
}
let mut hash = vec![0u8; 32];
for label in name.rsplit(".") {
hash.append(&mut keccak256(label.as_bytes()).to_vec());
hash = keccak256(hash.as_slice()).to_vec();
}
hash
}
#[cfg(test)]
mod test {
use super::namehash;
#[test]
fn test_namehash() {
// Test cases, same than used @ EIP137 `https://github.com/ethereum/EIPs/blob/master/EIPS/eip-137.md`
let cases = vec![
(
"",
&[
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
],
),
(
"crypto",
&[
0x0f, 0x4a, 0x10, 0xa4, 0xf4, 0x6c, 0x28, 0x8c, 0xea, 0x36, 0x5f, 0xcf, 0x45,
0xcc, 0xcf, 0x0e, 0x9d, 0x90, 0x1b, 0x94, 0x5b, 0x98, 0x29, 0xcc, 0xdb, 0x54,
0xc1, 0x0d, 0xc3, 0xcb, 0x7a, 0x6f,
],
),
(
"eth",
&[
0x93, 0xcd, 0xeb, 0x70, 0x8b, 0x75, 0x45, 0xdc, 0x66, 0x8e, 0xb9, 0x28, 0x1,
0x76, 0x16, 0x9d, 0x1c, 0x33, 0xcf, 0xd8, 0xed, 0x6f, 0x4, 0x69, 0xa, 0xb,
0xcc, 0x88, 0xa9, 0x3f, 0xc4, 0xae,
],
),
(
"foo.eth",
&[
0xde, 0x9b, 0x9, 0xfd, 0x7c, 0x5f, 0x90, 0x1e, 0x23, 0xa3, 0xf1, 0x9f, 0xec,
0xc5, 0x48, 0x28, 0xe9, 0xc8, 0x48, 0x53, 0x98, 0x1, 0xe8, 0x65, 0x91, 0xbd,
0x98, 0x1, 0xb0, 0x19, 0xf8, 0x4f,
],
),
];
for (name, expected_namehash) in cases {
let namehash: &[u8] = &namehash(name);
assert_eq!(namehash, expected_namehash);
}
}
}