| /* |
| 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])} |
| } |
| */ |