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#![no_std]
#![doc(html_logo_url =
"https://raw.githubusercontent.com/RustCrypto/meta/master/logo_small.png")]
extern crate block_buffer;
#[macro_use] extern crate opaque_debug;
#[macro_use] pub extern crate digest;
#[cfg(feature = "asm")]
extern crate md5_asm as utils;
#[cfg(feature = "std")]
extern crate std;
#[cfg(not(feature = "asm"))]
mod utils;
use utils::compress;
use block_buffer::BlockBuffer;
use block_buffer::byteorder::{LE, ByteOrder};
pub use digest::Digest;
use digest::{Input, BlockInput, FixedOutput, Reset};
use digest::generic_array::GenericArray;
use digest::generic_array::typenum::{U16, U64};
mod consts;
#[derive(Clone)]
pub struct Md5 {
length_bytes: u64,
buffer: BlockBuffer<U64>,
state: [u32; 4],
}
impl Default for Md5 {
fn default() -> Self {
Md5 {
length_bytes: 0,
buffer: Default::default(),
state: consts::S0,
}
}
}
#[inline(always)]
fn convert(d: &GenericArray<u8, U64>) -> &[u8; 64] {
unsafe { &*(d.as_ptr() as *const [u8; 64]) }
}
impl Md5 {
#[inline]
fn finalize(&mut self) {
let state = &mut self.state;
let l = (self.length_bytes << 3) as u64;
self.buffer.len64_padding::<LE, _>(l, |d| compress(state, convert(d)));
}
}
impl BlockInput for Md5 {
type BlockSize = U64;
}
impl Input for Md5 {
#[inline]
fn input<B: AsRef<[u8]>>(&mut self, input: B) {
let input = input.as_ref();
self.length_bytes = self.length_bytes.wrapping_add(input.len() as u64);
let self_state = &mut self.state;
self.buffer.input(input, |d| compress(self_state, convert(d)));
}
}
impl FixedOutput for Md5 {
type OutputSize = U16;
#[inline]
fn fixed_result(mut self) -> GenericArray<u8, Self::OutputSize> {
let mut out = GenericArray::default();
self.finalize();
LE::write_u32_into(&self.state, &mut out);
out
}
}
impl Reset for Md5 {
fn reset(&mut self) {
self.state = consts::S0;
self.length_bytes = 0;
self.buffer.reset();
}
}
impl_opaque_debug!(Md5);
impl_write!(Md5);