| /* |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| */ |
| |
| const HASH256_H0: u32 = 0x6A09E667; |
| const HASH256_H1: u32 = 0xBB67AE85; |
| const HASH256_H2: u32 = 0x3C6EF372; |
| const HASH256_H3: u32 = 0xA54FF53A; |
| const HASH256_H4: u32 = 0x510E527F; |
| const HASH256_H5: u32 = 0x9B05688C; |
| const HASH256_H6: u32 = 0x1F83D9AB; |
| const HASH256_H7: u32 = 0x5BE0CD19; |
| |
| const HASH256_K: [u32; 64] = [ |
| 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, |
| 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, |
| 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, |
| 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, |
| 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, |
| 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, |
| 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, |
| 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2, |
| ]; |
| |
| pub struct HASH256 { |
| length: [u32; 2], |
| h: [u32; 8], |
| w: [u32; 64], |
| } |
| |
| impl HASH256 { |
| fn s(n: u32, x: u32) -> u32 { |
| return ((x) >> n) | ((x) << (32 - n)); |
| } |
| fn r(n: u32, x: u32) -> u32 { |
| return (x) >> n; |
| } |
| |
| fn ch(x: u32, y: u32, z: u32) -> u32 { |
| return (x & y) ^ (!(x) & z); |
| } |
| |
| fn maj(x: u32, y: u32, z: u32) -> u32 { |
| return (x & y) ^ (x & z) ^ (y & z); |
| } |
| fn sig0(x: u32) -> u32 { |
| return HASH256::s(2, x) ^ HASH256::s(13, x) ^ HASH256::s(22, x); |
| } |
| |
| fn sig1(x: u32) -> u32 { |
| return HASH256::s(6, x) ^ HASH256::s(11, x) ^ HASH256::s(25, x); |
| } |
| |
| fn theta0(x: u32) -> u32 { |
| return HASH256::s(7, x) ^ HASH256::s(18, x) ^ HASH256::r(3, x); |
| } |
| |
| fn theta1(x: u32) -> u32 { |
| return HASH256::s(17, x) ^ HASH256::s(19, x) ^ HASH256::r(10, x); |
| } |
| |
| fn transform(&mut self) { |
| /* basic transformation step */ |
| for j in 16..64 { |
| self.w[j] = HASH256::theta1(self.w[j - 2]) |
| .wrapping_add(self.w[j - 7]) |
| .wrapping_add(HASH256::theta0(self.w[j - 15])) |
| .wrapping_add(self.w[j - 16]); |
| } |
| let mut a = self.h[0]; |
| let mut b = self.h[1]; |
| let mut c = self.h[2]; |
| let mut d = self.h[3]; |
| let mut e = self.h[4]; |
| let mut f = self.h[5]; |
| let mut g = self.h[6]; |
| let mut hh = self.h[7]; |
| for j in 0..64 { |
| /* 64 times - mush it up */ |
| let t1 = hh |
| .wrapping_add(HASH256::sig1(e)) |
| .wrapping_add(HASH256::ch(e, f, g)) |
| .wrapping_add(HASH256_K[j]) |
| .wrapping_add(self.w[j]); |
| let t2 = HASH256::sig0(a).wrapping_add(HASH256::maj(a, b, c)); |
| hh = g; |
| g = f; |
| f = e; |
| e = d.wrapping_add(t1); |
| d = c; |
| c = b; |
| b = a; |
| a = t1.wrapping_add(t2); |
| } |
| self.h[0] = self.h[0].wrapping_add(a); |
| self.h[1] = self.h[1].wrapping_add(b); |
| self.h[2] = self.h[2].wrapping_add(c); |
| self.h[3] = self.h[3].wrapping_add(d); |
| self.h[4] = self.h[4].wrapping_add(e); |
| self.h[5] = self.h[5].wrapping_add(f); |
| self.h[6] = self.h[6].wrapping_add(g); |
| self.h[7] = self.h[7].wrapping_add(hh); |
| } |
| |
| /* Initialise Hash function */ |
| pub fn init(&mut self) { |
| /* initialise */ |
| for i in 0..64 { |
| self.w[i] = 0 |
| } |
| self.length[0] = 0; |
| self.length[1] = 0; |
| self.h[0] = HASH256_H0; |
| self.h[1] = HASH256_H1; |
| self.h[2] = HASH256_H2; |
| self.h[3] = HASH256_H3; |
| self.h[4] = HASH256_H4; |
| self.h[5] = HASH256_H5; |
| self.h[6] = HASH256_H6; |
| self.h[7] = HASH256_H7; |
| } |
| |
| pub fn new() -> HASH256 { |
| let mut nh = HASH256 { |
| length: [0; 2], |
| h: [0; 8], |
| w: [0; 64], |
| }; |
| nh.init(); |
| return nh; |
| } |
| |
| /* process a single byte */ |
| pub fn process(&mut self, byt: u8) { |
| /* process the next message byte */ |
| let cnt = ((self.length[0] / 32) % 16) as usize; |
| self.w[cnt] <<= 8; |
| self.w[cnt] |= (byt & 0xFF) as u32; |
| self.length[0] += 8; |
| if self.length[0] == 0 { |
| self.length[1] += 1; |
| self.length[0] = 0 |
| } |
| if (self.length[0] % 512) == 0 { |
| self.transform() |
| } |
| } |
| |
| /* process an array of bytes */ |
| |
| pub fn process_array(&mut self, b: &[u8]) { |
| for i in 0..b.len() { |
| self.process(b[i]) |
| } |
| } |
| |
| /* process a 32-bit integer */ |
| pub fn process_num(&mut self, n: i32) { |
| self.process(((n >> 24) & 0xff) as u8); |
| self.process(((n >> 16) & 0xff) as u8); |
| self.process(((n >> 8) & 0xff) as u8); |
| self.process((n & 0xff) as u8); |
| } |
| |
| /* Generate 32-byte Hash */ |
| pub fn hash(&mut self) -> [u8; 32] { |
| /* pad message and finish - supply digest */ |
| let mut digest: [u8; 32] = [0; 32]; |
| let len0 = self.length[0]; |
| let len1 = self.length[1]; |
| self.process(0x80); |
| while (self.length[0] % 512) != 448 { |
| self.process(0) |
| } |
| self.w[14] = len1; |
| self.w[15] = len0; |
| self.transform(); |
| for i in 0..32 { |
| /* convert to bytes */ |
| digest[i] = ((self.h[i / 4] >> (8 * (3 - i % 4))) & 0xff) as u8; |
| } |
| self.init(); |
| return digest; |
| } |
| } |
| |
| //248d6a61 d20638b8 e5c02693 0c3e6039 a33ce459 64ff2167 f6ecedd4 19db06c1 |
| /* |
| fn main() { |
| let s = String::from("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"); |
| let test = s.into_bytes(); |
| let mut sh=HASH256::new(); |
| |
| for i in 0..test.len(){ |
| sh.process(test[i]); |
| } |
| |
| let digest=sh.hash(); |
| for i in 0..32 {print!("{:02x}",digest[i])} |
| } |
| */ |