algorithm/JavaScript
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/JavaScript.git synced 2025-07-07 02:05:08 +08:00
Code Issues Packages Projects Releases Wiki Activity

SHA256.js: Standardjs fixes

Browse Source
This commit is contained in:
Christian Clauss
2020-05-04 21:38:33 +02:00
committed by GitHub
parent ab22a0ebc4
commit fb188108bb
1 changed files with 25 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
Hashes/SHA256.js
View File

@ -125,43 +125,43 @@ function SHA256 (message) {
// extend 16 32-bit words to 80 32-bit words // extend 16 32-bit words to 80 32-bit words
for (let i = 16; i < 64; i++) { for (let i = 16; i < 64; i++) {
const W1 = words[i - 15] const W1 = words[i - 15]
const W2 = words[i - 2] const W2 = words[i - 2]
const R1 = rotateRight(W1, 7) const R1 = rotateRight(W1, 7)
const R2 = rotateRight(W1, 18) const R2 = rotateRight(W1, 18)
const R3 = rotateRight(W2, 17) const R3 = rotateRight(W2, 17)
const R4 = rotateRight(W2, 19) const R4 = rotateRight(W2, 19)
const S0 = parseInt(R1, 2) ^ parseInt(R2, 2) ^ (parseInt(W1, 2) >>> 3) const S0 = parseInt(R1, 2) ^ parseInt(R2, 2) ^ (parseInt(W1, 2) >>> 3)
const S1 = parseInt(R3, 2) ^ parseInt(R4, 2) ^ (parseInt(W2, 2) >>> 10) const S1 = parseInt(R3, 2) ^ parseInt(R4, 2) ^ (parseInt(W2, 2) >>> 10)
const val = parseInt(words[i - 16], 2) + S0 + parseInt(words[i - 7], 2) + S1 const val = parseInt(words[i - 16], 2) + S0 + parseInt(words[i - 7], 2) + S1
words[i] = pad((val >>> 0).toString(2), 32) words[i] = pad((val >>> 0).toString(2), 32)
} }
// initialize variables for this chunk // initialize variables for this chunk
let [a, b, c, d, e, f, g, h] = [H0, H1, H2, H3, H4, H5, H6, H7] let [a, b, c, d, e, f, g, h] = [H0, H1, H2, H3, H4, H5, H6, H7]
for (let i = 0; i < 64; i++) { for (let i = 0; i < 64; i++) {
const S1 = [6, 11, 25] const S1 = [6, 11, 25]
.map(turns => rotateRight(pad(e.toString(2), 32), turns)) .map(turns => rotateRight(pad(e.toString(2), 32), turns))
.map(bitstring => parseInt(bitstring, 2)) .map(bitstring => parseInt(bitstring, 2))
.reduce((acc, curr) => acc ^ curr, 0) >>> 0 .reduce((acc, curr) => acc ^ curr, 0) >>> 0
const CH = ((e & f) ^ (~e & g)) >>> 0 const CH = ((e & f) ^ (~e & g)) >>> 0
const temp1 = (h + S1 + CH + K[i] + parseInt(words[i], 2)) >>> 0 const temp1 = (h + S1 + CH + K[i] + parseInt(words[i], 2)) >>> 0
const S0 = [2, 13, 22] const S0 = [2, 13, 22]
.map(turns => rotateRight(pad(a.toString(2), 32), turns)) .map(turns => rotateRight(pad(a.toString(2), 32), turns))
.map(bitstring => parseInt(bitstring, 2)) .map(bitstring => parseInt(bitstring, 2))
.reduce((acc, curr) => acc ^ curr, 0) >>> 0 .reduce((acc, curr) => acc ^ curr, 0) >>> 0
const maj = ((a & b) ^ (a & c) ^ (b & c)) >>> 0 const maj = ((a & b) ^ (a & c) ^ (b & c)) >>> 0
const temp2 = (S0 + maj) >>> 0 const temp2 = (S0 + maj) >>> 0
h = g h = g
g = f g = f
f = e f = e
e = (d + temp1) >>> 0 e = (d + temp1) >>> 0
d = c d = c
c = b c = b
b = a b = a
a = (temp1 + temp2) >>> 0 a = (temp1 + temp2) >>> 0
} }
// add values for this chunk to main hash variables (unsigned) // add values for this chunk to main hash variables (unsigned)