1#![allow(
5 non_snake_case,
6 clippy::cast_lossless,
7 clippy::eq_op,
8 clippy::identity_op,
9 clippy::many_single_char_names,
10 clippy::unreadable_literal
11)]
12
13#[cfg_attr(feature = "opt_size", inline(never))]
14#[cfg_attr(not(feature = "opt_size"), inline(always))]
15fn load_be(base: &[u8], offset: usize) -> u64 {
16 let addr = &base[offset..];
17 (addr[7] as u64)
18 | (addr[6] as u64) << 8
19 | (addr[5] as u64) << 16
20 | (addr[4] as u64) << 24
21 | (addr[3] as u64) << 32
22 | (addr[2] as u64) << 40
23 | (addr[1] as u64) << 48
24 | (addr[0] as u64) << 56
25}
26
27#[cfg_attr(feature = "opt_size", inline(never))]
28#[cfg_attr(not(feature = "opt_size"), inline(always))]
29fn store_be(base: &mut [u8], offset: usize, x: u64) {
30 let addr = &mut base[offset..];
31 addr[7] = x as u8;
32 addr[6] = (x >> 8) as u8;
33 addr[5] = (x >> 16) as u8;
34 addr[4] = (x >> 24) as u8;
35 addr[3] = (x >> 32) as u8;
36 addr[2] = (x >> 40) as u8;
37 addr[1] = (x >> 48) as u8;
38 addr[0] = (x >> 56) as u8;
39}
40
41struct W([u64; 16]);
42
43#[derive(Copy, Clone)]
44struct State([u64; 8]);
45
46impl W {
47 fn new(input: &[u8]) -> Self {
48 let mut w = [0u64; 16];
49 for (i, e) in w.iter_mut().enumerate() {
50 *e = load_be(input, i * 8)
51 }
52 W(w)
53 }
54
55 #[cfg_attr(feature = "opt_size", inline(never))]
56 #[cfg_attr(not(feature = "opt_size"), inline(always))]
57 fn Ch(x: u64, y: u64, z: u64) -> u64 {
58 (x & y) ^ (!x & z)
59 }
60
61 #[cfg_attr(feature = "opt_size", inline(never))]
62 #[cfg_attr(not(feature = "opt_size"), inline(always))]
63 fn Maj(x: u64, y: u64, z: u64) -> u64 {
64 (x & y) ^ (x & z) ^ (y & z)
65 }
66
67 #[cfg_attr(feature = "opt_size", inline(never))]
68 #[cfg_attr(not(feature = "opt_size"), inline(always))]
69 fn Sigma0(x: u64) -> u64 {
70 x.rotate_right(28) ^ x.rotate_right(34) ^ x.rotate_right(39)
71 }
72
73 #[cfg_attr(feature = "opt_size", inline(never))]
74 #[cfg_attr(not(feature = "opt_size"), inline(always))]
75 fn Sigma1(x: u64) -> u64 {
76 x.rotate_right(14) ^ x.rotate_right(18) ^ x.rotate_right(41)
77 }
78
79 #[cfg_attr(feature = "opt_size", inline(never))]
80 #[cfg_attr(not(feature = "opt_size"), inline(always))]
81 fn sigma0(x: u64) -> u64 {
82 x.rotate_right(1) ^ x.rotate_right(8) ^ (x >> 7)
83 }
84
85 #[cfg_attr(feature = "opt_size", inline(never))]
86 #[cfg_attr(not(feature = "opt_size"), inline(always))]
87 fn sigma1(x: u64) -> u64 {
88 x.rotate_right(19) ^ x.rotate_right(61) ^ (x >> 6)
89 }
90
91 #[cfg_attr(feature = "opt_size", inline(never))]
92 #[cfg_attr(not(feature = "opt_size"), inline(always))]
93 fn M(&mut self, a: usize, b: usize, c: usize, d: usize) {
94 let w = &mut self.0;
95 w[a] = w[a]
96 .wrapping_add(Self::sigma1(w[b]))
97 .wrapping_add(w[c])
98 .wrapping_add(Self::sigma0(w[d]));
99 }
100
101 #[cfg_attr(feature = "opt_size", inline(never))]
102 #[cfg_attr(not(feature = "opt_size"), inline(always))]
103 fn expand(&mut self) {
104 self.M(0, (0 + 14) & 15, (0 + 9) & 15, (0 + 1) & 15);
105 self.M(1, (1 + 14) & 15, (1 + 9) & 15, (1 + 1) & 15);
106 self.M(2, (2 + 14) & 15, (2 + 9) & 15, (2 + 1) & 15);
107 self.M(3, (3 + 14) & 15, (3 + 9) & 15, (3 + 1) & 15);
108 self.M(4, (4 + 14) & 15, (4 + 9) & 15, (4 + 1) & 15);
109 self.M(5, (5 + 14) & 15, (5 + 9) & 15, (5 + 1) & 15);
110 self.M(6, (6 + 14) & 15, (6 + 9) & 15, (6 + 1) & 15);
111 self.M(7, (7 + 14) & 15, (7 + 9) & 15, (7 + 1) & 15);
112 self.M(8, (8 + 14) & 15, (8 + 9) & 15, (8 + 1) & 15);
113 self.M(9, (9 + 14) & 15, (9 + 9) & 15, (9 + 1) & 15);
114 self.M(10, (10 + 14) & 15, (10 + 9) & 15, (10 + 1) & 15);
115 self.M(11, (11 + 14) & 15, (11 + 9) & 15, (11 + 1) & 15);
116 self.M(12, (12 + 14) & 15, (12 + 9) & 15, (12 + 1) & 15);
117 self.M(13, (13 + 14) & 15, (13 + 9) & 15, (13 + 1) & 15);
118 self.M(14, (14 + 14) & 15, (14 + 9) & 15, (14 + 1) & 15);
119 self.M(15, (15 + 14) & 15, (15 + 9) & 15, (15 + 1) & 15);
120 }
121
122 #[cfg_attr(feature = "opt_size", inline(never))]
123 #[cfg_attr(not(feature = "opt_size"), inline(always))]
124 fn F(&mut self, state: &mut State, i: usize, k: u64) {
125 let t = &mut state.0;
126 t[(16 - i + 7) & 7] = t[(16 - i + 7) & 7]
127 .wrapping_add(Self::Sigma1(t[(16 - i + 4) & 7]))
128 .wrapping_add(Self::Ch(
129 t[(16 - i + 4) & 7],
130 t[(16 - i + 5) & 7],
131 t[(16 - i + 6) & 7],
132 ))
133 .wrapping_add(k)
134 .wrapping_add(self.0[i]);
135 t[(16 - i + 3) & 7] = t[(16 - i + 3) & 7].wrapping_add(t[(16 - i + 7) & 7]);
136 t[(16 - i + 7) & 7] = t[(16 - i + 7) & 7]
137 .wrapping_add(Self::Sigma0(t[(16 - i + 0) & 7]))
138 .wrapping_add(Self::Maj(
139 t[(16 - i + 0) & 7],
140 t[(16 - i + 1) & 7],
141 t[(16 - i + 2) & 7],
142 ));
143 }
144
145 fn G(&mut self, state: &mut State, s: usize) {
146 const ROUND_CONSTANTS: [u64; 80] = [
147 0x428a2f98d728ae22,
148 0x7137449123ef65cd,
149 0xb5c0fbcfec4d3b2f,
150 0xe9b5dba58189dbbc,
151 0x3956c25bf348b538,
152 0x59f111f1b605d019,
153 0x923f82a4af194f9b,
154 0xab1c5ed5da6d8118,
155 0xd807aa98a3030242,
156 0x12835b0145706fbe,
157 0x243185be4ee4b28c,
158 0x550c7dc3d5ffb4e2,
159 0x72be5d74f27b896f,
160 0x80deb1fe3b1696b1,
161 0x9bdc06a725c71235,
162 0xc19bf174cf692694,
163 0xe49b69c19ef14ad2,
164 0xefbe4786384f25e3,
165 0x0fc19dc68b8cd5b5,
166 0x240ca1cc77ac9c65,
167 0x2de92c6f592b0275,
168 0x4a7484aa6ea6e483,
169 0x5cb0a9dcbd41fbd4,
170 0x76f988da831153b5,
171 0x983e5152ee66dfab,
172 0xa831c66d2db43210,
173 0xb00327c898fb213f,
174 0xbf597fc7beef0ee4,
175 0xc6e00bf33da88fc2,
176 0xd5a79147930aa725,
177 0x06ca6351e003826f,
178 0x142929670a0e6e70,
179 0x27b70a8546d22ffc,
180 0x2e1b21385c26c926,
181 0x4d2c6dfc5ac42aed,
182 0x53380d139d95b3df,
183 0x650a73548baf63de,
184 0x766a0abb3c77b2a8,
185 0x81c2c92e47edaee6,
186 0x92722c851482353b,
187 0xa2bfe8a14cf10364,
188 0xa81a664bbc423001,
189 0xc24b8b70d0f89791,
190 0xc76c51a30654be30,
191 0xd192e819d6ef5218,
192 0xd69906245565a910,
193 0xf40e35855771202a,
194 0x106aa07032bbd1b8,
195 0x19a4c116b8d2d0c8,
196 0x1e376c085141ab53,
197 0x2748774cdf8eeb99,
198 0x34b0bcb5e19b48a8,
199 0x391c0cb3c5c95a63,
200 0x4ed8aa4ae3418acb,
201 0x5b9cca4f7763e373,
202 0x682e6ff3d6b2b8a3,
203 0x748f82ee5defb2fc,
204 0x78a5636f43172f60,
205 0x84c87814a1f0ab72,
206 0x8cc702081a6439ec,
207 0x90befffa23631e28,
208 0xa4506cebde82bde9,
209 0xbef9a3f7b2c67915,
210 0xc67178f2e372532b,
211 0xca273eceea26619c,
212 0xd186b8c721c0c207,
213 0xeada7dd6cde0eb1e,
214 0xf57d4f7fee6ed178,
215 0x06f067aa72176fba,
216 0x0a637dc5a2c898a6,
217 0x113f9804bef90dae,
218 0x1b710b35131c471b,
219 0x28db77f523047d84,
220 0x32caab7b40c72493,
221 0x3c9ebe0a15c9bebc,
222 0x431d67c49c100d4c,
223 0x4cc5d4becb3e42b6,
224 0x597f299cfc657e2a,
225 0x5fcb6fab3ad6faec,
226 0x6c44198c4a475817,
227 ];
228 let rc = &ROUND_CONSTANTS[s * 16..];
229 self.F(state, 0, rc[0]);
230 self.F(state, 1, rc[1]);
231 self.F(state, 2, rc[2]);
232 self.F(state, 3, rc[3]);
233 self.F(state, 4, rc[4]);
234 self.F(state, 5, rc[5]);
235 self.F(state, 6, rc[6]);
236 self.F(state, 7, rc[7]);
237 self.F(state, 8, rc[8]);
238 self.F(state, 9, rc[9]);
239 self.F(state, 10, rc[10]);
240 self.F(state, 11, rc[11]);
241 self.F(state, 12, rc[12]);
242 self.F(state, 13, rc[13]);
243 self.F(state, 14, rc[14]);
244 self.F(state, 15, rc[15]);
245 }
246}
247
248impl State {
249 fn new() -> Self {
250 const IV: [u8; 64] = [
251 0x6a, 0x09, 0xe6, 0x67, 0xf3, 0xbc, 0xc9, 0x08, 0xbb, 0x67, 0xae, 0x85, 0x84, 0xca,
252 0xa7, 0x3b, 0x3c, 0x6e, 0xf3, 0x72, 0xfe, 0x94, 0xf8, 0x2b, 0xa5, 0x4f, 0xf5, 0x3a,
253 0x5f, 0x1d, 0x36, 0xf1, 0x51, 0x0e, 0x52, 0x7f, 0xad, 0xe6, 0x82, 0xd1, 0x9b, 0x05,
254 0x68, 0x8c, 0x2b, 0x3e, 0x6c, 0x1f, 0x1f, 0x83, 0xd9, 0xab, 0xfb, 0x41, 0xbd, 0x6b,
255 0x5b, 0xe0, 0xcd, 0x19, 0x13, 0x7e, 0x21, 0x79,
256 ];
257 let mut t = [0u64; 8];
258 for (i, e) in t.iter_mut().enumerate() {
259 *e = load_be(&IV, i * 8)
260 }
261 State(t)
262 }
263
264 #[cfg_attr(feature = "opt_size", inline(never))]
265 #[cfg_attr(not(feature = "opt_size"), inline(always))]
266 fn add(&mut self, x: &State) {
267 let sx = &mut self.0;
268 let ex = &x.0;
269 sx[0] = sx[0].wrapping_add(ex[0]);
270 sx[1] = sx[1].wrapping_add(ex[1]);
271 sx[2] = sx[2].wrapping_add(ex[2]);
272 sx[3] = sx[3].wrapping_add(ex[3]);
273 sx[4] = sx[4].wrapping_add(ex[4]);
274 sx[5] = sx[5].wrapping_add(ex[5]);
275 sx[6] = sx[6].wrapping_add(ex[6]);
276 sx[7] = sx[7].wrapping_add(ex[7]);
277 }
278
279 fn store(&self, out: &mut [u8]) {
280 for (i, &e) in self.0.iter().enumerate() {
281 store_be(out, i * 8, e);
282 }
283 }
284
285 fn blocks(&mut self, mut input: &[u8]) -> usize {
286 let mut t = *self;
287 let mut inlen = input.len();
288 while inlen >= 128 {
289 let mut w = W::new(input);
290 w.G(&mut t, 0);
291 w.expand();
292 w.G(&mut t, 1);
293 w.expand();
294 w.G(&mut t, 2);
295 w.expand();
296 w.G(&mut t, 3);
297 w.expand();
298 w.G(&mut t, 4);
299 t.add(self);
300 self.0 = t.0;
301 input = &input[128..];
302 inlen -= 128;
303 }
304 inlen
305 }
306}
307
308#[derive(Copy, Clone)]
309pub struct Hash {
310 state: State,
311 w: [u8; 128],
312 r: usize,
313 len: usize,
314}
315
316impl Hash {
317 pub fn new() -> Hash {
318 Hash {
319 state: State::new(),
320 r: 0,
321 w: [0u8; 128],
322 len: 0,
323 }
324 }
325
326 pub fn update<T: AsRef<[u8]>>(&mut self, input: T) {
328 let input = input.as_ref();
329 let mut n = input.len();
330 self.len += n;
331 let av = 128 - self.r;
332 let tc = ::core::cmp::min(n, av);
333 self.w[self.r..self.r + tc].copy_from_slice(&input[0..tc]);
334 self.r += tc;
335 n -= tc;
336 let pos = tc;
337 if self.r == 128 {
338 self.state.blocks(&self.w);
339 self.r = 0;
340 }
341 if self.r == 0 && n > 0 {
342 let rb = self.state.blocks(&input[pos..]);
343 if rb > 0 {
344 self.w[..rb].copy_from_slice(&input[pos + n - rb..]);
345 self.r = rb;
346 }
347 }
348 }
349
350 pub fn finalize(mut self) -> [u8; 64] {
352 let mut padded = [0u8; 256];
353 padded[..self.r].copy_from_slice(&self.w[..self.r]);
354 padded[self.r] = 0x80;
355 let r = if self.r < 112 { 128 } else { 256 };
356 let bits = self.len * 8;
357 for i in 0..8 {
358 padded[r - 8 + i] = (bits as u64 >> (56 - i * 8)) as u8;
359 }
360 self.state.blocks(&padded[..r]);
361 let mut out = [0u8; 64];
362 self.state.store(&mut out);
363 out
364 }
365
366 pub fn hash<T: AsRef<[u8]>>(input: T) -> [u8; 64] {
368 let mut h = Hash::new();
369 h.update(input);
370 h.finalize()
371 }
372}
373
374impl Default for Hash {
375 fn default() -> Self {
376 Self::new()
377 }
378}