1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
//! An implementation of the [SHA-1][1] cryptographic hash algorithm.
//!
//! # Usage
//!
//! ```rust
//! # #[macro_use] extern crate hex_literal;
//! # extern crate sha1;
//! # fn main() {
//! use sha1::{Sha1, Digest};
//!
//! // create a Sha1 object
//! let mut hasher = Sha1::new();
//!
//! // process input message
//! hasher.input(b"hello world");
//!
//! // acquire hash digest in the form of GenericArray,
//! // which in this case is equivalent to [u8; 20]
//! let result = hasher.result();
//! assert_eq!(result[..], hex!("2aae6c35c94fcfb415dbe95f408b9ce91ee846ed"));
//! # }
//! ```
//!
//! Also see [RustCrypto/hashes][2] readme.
//!
//! [1]: https://en.wikipedia.org/wiki/SHA-1
//! [2]: https://github.com/RustCrypto/hashes
#![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 = "std")]
extern crate std;
#[cfg(not(feature = "asm"))]
extern crate fake_simd as simd;
#[cfg(feature = "asm")]
extern crate sha1_asm;
#[cfg(feature = "asm")]
#[inline(always)]
fn compress(state: &mut [u32; 5], block: &GenericArray<u8, U64>) {
let block: &[u8; 64] = unsafe { core::mem::transmute(block) };
sha1_asm::compress(state, block);
}
#[cfg(not(feature = "asm"))]
mod utils;
#[cfg(not(feature = "asm"))]
use utils::compress;
pub use digest::Digest;
use digest::{Input, BlockInput, FixedOutput, Reset};
use digest::generic_array::GenericArray;
use digest::generic_array::typenum::{U20, U64};
use block_buffer::BlockBuffer;
use block_buffer::byteorder::{BE, ByteOrder};
mod consts;
use consts::{STATE_LEN, H};
/// Structure representing the state of a SHA-1 computation
#[derive(Clone)]
pub struct Sha1 {
h: [u32; STATE_LEN],
len: u64,
buffer: BlockBuffer<U64>,
}
impl Default for Sha1 {
fn default() -> Self {
Sha1{ h: H, len: 0u64, buffer: Default::default() }
}
}
impl BlockInput for Sha1 {
type BlockSize = U64;
}
impl Input for Sha1 {
fn input<B: AsRef<[u8]>>(&mut self, input: B) {
let input = input.as_ref();
// Assumes that `length_bits<<3` will not overflow
self.len += input.len() as u64;
let state = &mut self.h;
self.buffer.input(input, |d| compress(state, d));
}
}
impl FixedOutput for Sha1 {
type OutputSize = U20;
fn fixed_result(mut self) -> GenericArray<u8, Self::OutputSize> {
{
let state = &mut self.h;
let l = self.len << 3;
self.buffer.len64_padding::<BE, _>(l, |d| compress(state, d));
}
let mut out = GenericArray::default();
BE::write_u32_into(&self.h,&mut out);
out
}
}
impl Reset for Sha1 {
fn reset(&mut self) {
self.h = H;
self.len = 0;
self.buffer.reset();
}
}
impl_opaque_debug!(Sha1);
impl_write!(Sha1);
|
