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|
//! These are Rust bindings for the C implementation of BLAKE3. As there is a
//! native (and faster) Rust implementation of BLAKE3 provided in this same
//! repo, these bindings are not expected to be used in production. They're
//! intended for testing and benchmarking.
use std::ffi::{c_void, CString};
use std::mem::MaybeUninit;
#[cfg(test)]
mod test;
pub const BLOCK_LEN: usize = 64;
pub const CHUNK_LEN: usize = 1024;
pub const OUT_LEN: usize = 32;
// Feature detection functions for tests and benchmarks. Note that the C code
// does its own feature detection in blake3_dispatch.c.
#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
pub fn sse2_detected() -> bool {
is_x86_feature_detected!("sse2")
}
#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
pub fn sse41_detected() -> bool {
is_x86_feature_detected!("sse4.1")
}
#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
pub fn avx2_detected() -> bool {
is_x86_feature_detected!("avx2")
}
#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
pub fn avx512_detected() -> bool {
is_x86_feature_detected!("avx512f") && is_x86_feature_detected!("avx512vl")
}
#[derive(Clone)]
pub struct Hasher(ffi::blake3_hasher);
impl Hasher {
pub fn new() -> Self {
let mut c_state = MaybeUninit::uninit();
unsafe {
ffi::blake3_hasher_init(c_state.as_mut_ptr());
Self(c_state.assume_init())
}
}
pub fn new_keyed(key: &[u8; 32]) -> Self {
let mut c_state = MaybeUninit::uninit();
unsafe {
ffi::blake3_hasher_init_keyed(c_state.as_mut_ptr(), key.as_ptr());
Self(c_state.assume_init())
}
}
pub fn new_derive_key(context: &str) -> Self {
let mut c_state = MaybeUninit::uninit();
let context_c_string = CString::new(context).expect("valid C string, no null bytes");
unsafe {
ffi::blake3_hasher_init_derive_key(c_state.as_mut_ptr(), context_c_string.as_ptr());
Self(c_state.assume_init())
}
}
pub fn new_derive_key_raw(context: &[u8]) -> Self {
let mut c_state = MaybeUninit::uninit();
unsafe {
ffi::blake3_hasher_init_derive_key_raw(
c_state.as_mut_ptr(),
context.as_ptr() as *const _,
context.len(),
);
Self(c_state.assume_init())
}
}
pub fn update(&mut self, input: &[u8]) {
unsafe {
ffi::blake3_hasher_update(&mut self.0, input.as_ptr() as *const c_void, input.len());
}
}
pub fn finalize(&self, output: &mut [u8]) {
unsafe {
ffi::blake3_hasher_finalize(&self.0, output.as_mut_ptr(), output.len());
}
}
pub fn finalize_seek(&self, seek: u64, output: &mut [u8]) {
unsafe {
ffi::blake3_hasher_finalize_seek(&self.0, seek, output.as_mut_ptr(), output.len());
}
}
pub fn reset(&mut self) {
unsafe {
ffi::blake3_hasher_reset(&mut self.0);
}
}
}
pub mod ffi {
#[repr(C)]
#[derive(Copy, Clone)]
pub struct blake3_chunk_state {
pub cv: [u32; 8usize],
pub chunk_counter: u64,
pub buf: [u8; 64usize],
pub buf_len: u8,
pub blocks_compressed: u8,
pub flags: u8,
}
#[repr(C)]
#[derive(Copy, Clone)]
pub struct blake3_hasher {
pub key: [u32; 8usize],
pub chunk: blake3_chunk_state,
pub cv_stack_len: u8,
pub cv_stack: [u8; 1728usize],
}
extern "C" {
// public interface
pub fn blake3_hasher_init(self_: *mut blake3_hasher);
pub fn blake3_hasher_init_keyed(self_: *mut blake3_hasher, key: *const u8);
pub fn blake3_hasher_init_derive_key(
self_: *mut blake3_hasher,
context: *const ::std::os::raw::c_char,
);
pub fn blake3_hasher_init_derive_key_raw(
self_: *mut blake3_hasher,
context: *const ::std::os::raw::c_void,
context_len: usize,
);
pub fn blake3_hasher_update(
self_: *mut blake3_hasher,
input: *const ::std::os::raw::c_void,
input_len: usize,
);
pub fn blake3_hasher_finalize(self_: *const blake3_hasher, out: *mut u8, out_len: usize);
pub fn blake3_hasher_finalize_seek(
self_: *const blake3_hasher,
seek: u64,
out: *mut u8,
out_len: usize,
);
pub fn blake3_hasher_reset(self_: *mut blake3_hasher);
// portable low-level functions
pub fn blake3_compress_in_place_portable(
cv: *mut u32,
block: *const u8,
block_len: u8,
counter: u64,
flags: u8,
);
pub fn blake3_compress_xof_portable(
cv: *const u32,
block: *const u8,
block_len: u8,
counter: u64,
flags: u8,
out: *mut u8,
);
pub fn blake3_hash_many_portable(
inputs: *const *const u8,
num_inputs: usize,
blocks: usize,
key: *const u32,
counter: u64,
increment_counter: bool,
flags: u8,
flags_start: u8,
flags_end: u8,
out: *mut u8,
);
}
#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
pub mod x86 {
extern "C" {
// SSE2 low level functions
pub fn blake3_compress_in_place_sse2(
cv: *mut u32,
block: *const u8,
block_len: u8,
counter: u64,
flags: u8,
);
pub fn blake3_compress_xof_sse2(
cv: *const u32,
block: *const u8,
block_len: u8,
counter: u64,
flags: u8,
out: *mut u8,
);
pub fn blake3_hash_many_sse2(
inputs: *const *const u8,
num_inputs: usize,
blocks: usize,
key: *const u32,
counter: u64,
increment_counter: bool,
flags: u8,
flags_start: u8,
flags_end: u8,
out: *mut u8,
);
// SSE4.1 low level functions
pub fn blake3_compress_in_place_sse41(
cv: *mut u32,
block: *const u8,
block_len: u8,
counter: u64,
flags: u8,
);
pub fn blake3_compress_xof_sse41(
cv: *const u32,
block: *const u8,
block_len: u8,
counter: u64,
flags: u8,
out: *mut u8,
);
pub fn blake3_hash_many_sse41(
inputs: *const *const u8,
num_inputs: usize,
blocks: usize,
key: *const u32,
counter: u64,
increment_counter: bool,
flags: u8,
flags_start: u8,
flags_end: u8,
out: *mut u8,
);
// AVX2 low level functions
pub fn blake3_hash_many_avx2(
inputs: *const *const u8,
num_inputs: usize,
blocks: usize,
key: *const u32,
counter: u64,
increment_counter: bool,
flags: u8,
flags_start: u8,
flags_end: u8,
out: *mut u8,
);
// AVX-512 low level functions
pub fn blake3_compress_xof_avx512(
cv: *const u32,
block: *const u8,
block_len: u8,
counter: u64,
flags: u8,
out: *mut u8,
);
pub fn blake3_compress_in_place_avx512(
cv: *mut u32,
block: *const u8,
block_len: u8,
counter: u64,
flags: u8,
);
pub fn blake3_hash_many_avx512(
inputs: *const *const u8,
num_inputs: usize,
blocks: usize,
key: *const u32,
counter: u64,
increment_counter: bool,
flags: u8,
flags_start: u8,
flags_end: u8,
out: *mut u8,
);
}
}
#[cfg(feature = "neon")]
pub mod neon {
extern "C" {
// NEON low level functions
pub fn blake3_hash_many_neon(
inputs: *const *const u8,
num_inputs: usize,
blocks: usize,
key: *const u32,
counter: u64,
increment_counter: bool,
flags: u8,
flags_start: u8,
flags_end: u8,
out: *mut u8,
);
}
}
}
|
