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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
//! An implementation of the [SM3] cryptographic hash function defined
//! in OSCCA GM/T 0004-2012.
//!
//! # Usage
//! Hasher functionality is expressed via traits defined in the [`digest`]
//! crate.
//!
//! ```rust
//! use hex_literal::hex;
//! use sm3::{Digest, Sm3};
//!
//! // create a hasher object, to use it do not forget to import `Digest` trait
//! let mut hasher = Sm3::new();
//!
//! // write input message
//! hasher.update(b"hello world");
//!
//! // read hash digest and consume hasher
//! let result = hasher.finalize();
//!
//! assert_eq!(result[..], hex!("
//! 44f0061e69fa6fdfc290c494654a05dc0c053da7e5c52b84ef93a9d67d3fff88
//! ")[..]);
//! ```
//!
//! Also see [RustCrypto/hashes] readme.
//!
//! [SM3]: https://en.wikipedia.org/wiki/SM3_(hash_function)
//! [RustCrypto/hashes]: https://github.com/RustCrypto/hashes
#![no_std]
#![doc(
html_logo_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg",
html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg"
)]
#![forbid(unsafe_code)]
#![warn(missing_docs, rust_2018_idioms)]
pub use digest::{self, Digest};
use core::{fmt, slice::from_ref};
use digest::{
block_buffer::Eager,
core_api::{
AlgorithmName, Block, BlockSizeUser, Buffer, BufferKindUser, CoreWrapper, FixedOutputCore,
OutputSizeUser, Reset, UpdateCore,
},
typenum::{Unsigned, U32, U64},
HashMarker, Output,
};
mod compress;
mod consts;
use compress::compress;
/// Core SM3 hasher state.
#[derive(Clone)]
pub struct Sm3Core {
block_len: u64,
h: [u32; 8],
}
impl HashMarker for Sm3Core {}
impl BlockSizeUser for Sm3Core {
type BlockSize = U64;
}
impl BufferKindUser for Sm3Core {
type BufferKind = Eager;
}
impl OutputSizeUser for Sm3Core {
type OutputSize = U32;
}
impl UpdateCore for Sm3Core {
#[inline]
fn update_blocks(&mut self, blocks: &[Block<Self>]) {
self.block_len += blocks.len() as u64;
compress(&mut self.h, blocks);
}
}
impl FixedOutputCore for Sm3Core {
#[inline]
fn finalize_fixed_core(&mut self, buffer: &mut Buffer<Self>, out: &mut Output<Self>) {
let bs = Self::BlockSize::U64;
let bit_len = 8 * (buffer.get_pos() as u64 + bs * self.block_len);
let mut h = self.h;
buffer.len64_padding_be(bit_len, |b| compress(&mut h, from_ref(b)));
for (chunk, v) in out.chunks_exact_mut(4).zip(h.iter()) {
chunk.copy_from_slice(&v.to_be_bytes());
}
}
}
impl Default for Sm3Core {
#[inline]
fn default() -> Self {
Self {
h: consts::H0,
block_len: 0,
}
}
}
impl Reset for Sm3Core {
#[inline]
fn reset(&mut self) {
*self = Default::default();
}
}
impl AlgorithmName for Sm3Core {
fn write_alg_name(f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("Sm3")
}
}
impl fmt::Debug for Sm3Core {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("Sm3Core { ... }")
}
}
/// Sm3 hasher state.
pub type Sm3 = CoreWrapper<Sm3Core>;
|
