mirror of
https://github.com/luxfi/crypto.git
synced 2026-10-30 16:59:13 +00:00
zeekay
0c049f1871
Canonical Rust binding for the Poseidon2 t=2 BN254 Merkle-Damgard hasher landed in luxcpp/crypto/poseidon. Links statically against libposeidon.a + libposeidon_cpu.a and exposes: hash(input) -> [u8; 32] hash_into(input, output) -> in-place fill of caller buffer Byte-equal to upstream gnark-crypto v0.20.1 (NewMerkleDamgardHasher over NewParameters(2, 6, 50)). 10 spec-vector integration tests pass, including the canonical 32B/64B/96B block-boundary cases and trivial avalanche/determinism checks. Crate is no_std + forbid(unsafe_op_in_unsafe_fn) and follows the existing per-algorithm crate layout.
49 lines
1.8 KiB
Rust
49 lines
1.8 KiB
Rust
// Build script for lux-crypto-poseidon.
|
|
//
|
|
// Discovers the static archives produced by `luxcpp/crypto/poseidon` and emits
|
|
// the link directives. Resolution order (first hit wins):
|
|
// 1. CRYPTO_DIR - install prefix; archives at $CRYPTO_DIR/lib/poseidon/
|
|
// 2. CRYPTO_BUILD_DIR - cmake build directory; archives at $CRYPTO_BUILD_DIR/poseidon/
|
|
// 3. Default fallback to ../../../../luxcpp/crypto/build-cto
|
|
//
|
|
// We link the C++ runtime (libc++ on macOS, libstdc++ elsewhere) because the
|
|
// archive contains C++ object code from the canonical implementation.
|
|
|
|
use std::env;
|
|
use std::path::PathBuf;
|
|
|
|
fn main() {
|
|
let manifest_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
|
|
let base: PathBuf = if let Ok(d) = env::var("CRYPTO_DIR") {
|
|
PathBuf::from(d).join("lib")
|
|
} else if let Ok(d) = env::var("CRYPTO_BUILD_DIR") {
|
|
PathBuf::from(d)
|
|
} else {
|
|
manifest_dir
|
|
.join("..")
|
|
.join("..")
|
|
.join("..")
|
|
.join("..")
|
|
.join("luxcpp")
|
|
.join("crypto")
|
|
.join("build-cto")
|
|
};
|
|
|
|
println!("cargo:rerun-if-changed=src/lib.rs");
|
|
println!("cargo:rerun-if-env-changed=CRYPTO_DIR");
|
|
println!("cargo:rerun-if-env-changed=CRYPTO_BUILD_DIR");
|
|
|
|
let lib_path = base.join("poseidon");
|
|
println!("cargo:rustc-link-search=native={}", lib_path.display());
|
|
// The umbrella `libposeidon.a` carries the C-ABI shim; the CPU body lives
|
|
// in `libposeidon_cpu.a`. Both are required for symbol resolution.
|
|
println!("cargo:rustc-link-lib=static=poseidon");
|
|
println!("cargo:rustc-link-lib=static=poseidon_cpu");
|
|
|
|
if cfg!(target_os = "macos") {
|
|
println!("cargo:rustc-link-lib=c++");
|
|
} else {
|
|
println!("cargo:rustc-link-lib=stdc++");
|
|
}
|
|
}
|