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#![no_std]
extern crate generic_array;
extern crate byte_tools;
extern crate digest;
extern crate digest_buffer;
pub use digest::Digest;
use byte_tools::{write_u32v_le, write_u32_le, add_bytes_to_bits};
use digest_buffer::{DigestBuffer};
use generic_array::GenericArray;
use generic_array::typenum::{U20, U64};
mod block;
use block::{process_msg_block, DIGEST_BUF_LEN};
type BlockSize = U64;
type Block = GenericArray<u8, BlockSize>;
#[derive(Clone, Copy)]
pub struct Ripemd160 {
h: [u32; DIGEST_BUF_LEN],
length_bits: u64,
buffer: DigestBuffer<BlockSize>,
}
impl Ripemd160 {
fn finalize(&mut self) {
let st_h = &mut self.h;
self.buffer.standard_padding(8, |d: &Block| {
process_msg_block(d, &mut *st_h)
});
write_u32_le(self.buffer.next(4), self.length_bits as u32);
write_u32_le(self.buffer.next(4), (self.length_bits >> 32) as u32);
process_msg_block(self.buffer.full_buffer(), st_h);
}
}
impl Default for Ripemd160 {
fn default() -> Self {
Self {
h: [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0],
length_bits: 0,
buffer: Default::default(),
}
}
}
impl digest::Input for Ripemd160 {
type BlockSize = BlockSize;
fn digest(&mut self, input: &[u8]) {
self.length_bits = add_bytes_to_bits(self.length_bits,
input.len() as u64);
let st_h = &mut self.h;
self.buffer.input(input, |d: &Block| {
process_msg_block(d, &mut *st_h);
});
}
}
impl digest::FixedOutput for Ripemd160 {
type OutputSize = U20;
fn fixed_result(mut self) -> GenericArray<u8, Self::OutputSize> {
self.finalize();
let mut out = GenericArray::default();
write_u32v_le(&mut out[..], &self.h);
out
}
}