hash160
Version:
239 lines (231 loc) • 8 kB
JavaScript
// Extracted from https://github.com/crypto-browserify/ripemd160
const ARRAY16 = new Array(16)
const zl = initU8Array([
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
])
const zr = initU8Array([
5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
])
const sl = initU8Array([
11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
])
const sr = initU8Array([
8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
])
const hl = initU32Array([0x00000000, 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xa953fd4e])
const hr = initU32Array([0x50a28be6, 0x5c4dd124, 0x6d703ef3, 0x7a6d76e9, 0x00000000])
function rotl(x, n) {
return (x << n) | (x >>> (32 - n))
}
function fn1(a, b, c, d, e, m, k, s) {
return (rotl((a + (b ^ c ^ d) + m + k) | 0, s) + e) | 0
}
function fn2(a, b, c, d, e, m, k, s) {
return (rotl((a + ((b & c) | ((~b) & d)) + m + k) | 0, s) + e) | 0
}
function fn3(a, b, c, d, e, m, k, s) {
return (rotl((a + ((b | (~c)) ^ d) + m + k) | 0, s) + e) | 0
}
function fn4(a, b, c, d, e, m, k, s) {
return (rotl((a + ((b & d) | (c & (~d))) + m + k) | 0, s) + e) | 0
}
function fn5(a, b, c, d, e, m, k, s) {
return (rotl((a + (b ^ (c | (~d))) + m + k) | 0, s) + e) | 0
}
function readInt32LE(buffer, offset) {
offset >>>= 0
return (buffer[offset]) |
(buffer[offset + 1] << 8) |
(buffer[offset + 2] << 16) |
(buffer[offset + 3] << 24)
}
function writeUInt32LE(buffer, value, offset) {
value = +value
offset >>>= 0
buffer[offset + 3] = (value >>> 24)
buffer[offset + 2] = (value >>> 16)
buffer[offset + 1] = (value >>> 8)
buffer[offset] = (value & 0xff)
return offset + 4
}
function writeInt32LE(buffer, value, offset) {
value = +value
offset >>>= 0
buffer[offset] = (value & 0xff)
buffer[offset + 1] = (value >>> 8)
buffer[offset + 2] = (value >>> 16)
buffer[offset + 3] = (value >>> 24)
return offset + 4
}
function initU32Array(data) {
if (typeof Uint32Array !== 'undefined') {
return new Uint32Array(data)
} else {
return data
}
}
function initU8Array(data) {
if (typeof Uint8Array !== 'undefined') {
return new Uint8Array(data)
} else {
return data
}
}
function createU8Array(size) {
if (typeof Uint8Array !== 'undefined') {
return new Uint8Array(size)
} else {
return new Array(size)
}
}
export class RIPEMD160 {
constructor() {
this._block = createU8Array(64)
this._blockSize = 64
this._blockOffset = 0
this._length = [0, 0, 0, 0]
this._finalized = false
this._a = 0x67452301
this._b = 0xefcdab89
this._c = 0x98badcfe
this._d = 0x10325476
this._e = 0xc3d2e1f0
}
update(data) {
if (this._finalized) { throw new Error('Digest already called') }
// consume data
const block = this._block
let offset = 0
while (this._blockOffset + data.length - offset >= this._blockSize) {
for (let i = this._blockOffset; i < this._blockSize;) { block[i++] = data[offset++] }
this._update()
this._blockOffset = 0
}
while (offset < data.length) { block[this._blockOffset++] = data[offset++] }
// update length
for (let j = 0, carry = data.length * 8; carry > 0; ++j) {
this._length[j] += carry
carry = (this._length[j] / 0x0100000000) | 0
if (carry > 0) { this._length[j] -= 0x0100000000 * carry }
}
return this
}
_update() {
const words = ARRAY16
for (let j = 0; j < 16; ++j) {
words[j] = readInt32LE(this._block, j * 4)
}
let al = this._a | 0
let bl = this._b | 0
let cl = this._c | 0
let dl = this._d | 0
let el = this._e | 0
let ar = this._a | 0
let br = this._b | 0
let cr = this._c | 0
let dr = this._d | 0
let er = this._e | 0
// computation
for (let i = 0; i < 80; i += 1) {
let tl
let tr
if (i < 16) {
tl = fn1(al, bl, cl, dl, el, words[zl[i]], hl[0], sl[i])
tr = fn5(ar, br, cr, dr, er, words[zr[i]], hr[0], sr[i])
} else if (i < 32) {
tl = fn2(al, bl, cl, dl, el, words[zl[i]], hl[1], sl[i])
tr = fn4(ar, br, cr, dr, er, words[zr[i]], hr[1], sr[i])
} else if (i < 48) {
tl = fn3(al, bl, cl, dl, el, words[zl[i]], hl[2], sl[i])
tr = fn3(ar, br, cr, dr, er, words[zr[i]], hr[2], sr[i])
} else if (i < 64) {
tl = fn4(al, bl, cl, dl, el, words[zl[i]], hl[3], sl[i])
tr = fn2(ar, br, cr, dr, er, words[zr[i]], hr[3], sr[i])
} else { // if (i<80) {
tl = fn5(al, bl, cl, dl, el, words[zl[i]], hl[4], sl[i])
tr = fn1(ar, br, cr, dr, er, words[zr[i]], hr[4], sr[i])
}
al = el
el = dl
dl = rotl(cl, 10)
cl = bl
bl = tl
ar = er
er = dr
dr = rotl(cr, 10)
cr = br
br = tr
}
// update state
const t = (this._b + cl + dr) | 0
this._b = (this._c + dl + er) | 0
this._c = (this._d + el + ar) | 0
this._d = (this._e + al + br) | 0
this._e = (this._a + bl + cr) | 0
this._a = t
}
digest() {
if (this._finalized) {
throw new Error('Digest already called')
}
this._finalized = true
// create padding and handle blocks
this._block[this._blockOffset++] = 0x80
if (this._blockOffset > 56) {
this._block.fill(0, this._blockOffset, 64)
this._update()
this._blockOffset = 0
}
this._block.fill(0, this._blockOffset, 56)
writeUInt32LE(this._block, this._length[0], 56)
writeUInt32LE(this._block, this._length[1], 60)
this._update()
// produce result
const buffer = createU8Array(20)
writeInt32LE(buffer, this._a, 0)
writeInt32LE(buffer, this._b, 4)
writeInt32LE(buffer, this._c, 8)
writeInt32LE(buffer, this._d, 12)
writeInt32LE(buffer, this._e, 16)
// reset state
this._block.fill(0)
this._blockOffset = 0
for (let i = 0; i < 4; ++i) {
this._length[i] = 0
}
return buffer
}
}
function hexToBytes(hex) {
const bytes = []
for (let i = 0; i < hex.length; i += 2) {
bytes.push(parseInt(hex.substr(i, 2), 16))
}
return new Uint8Array(bytes)
}
function bytesToHex(byteArray) {
return Array.from(byteArray, function (byte) {
return ('0' + (byte & 0xFF).toString(16)).slice(-2)
}).join('')
}
function ripemd(hex) {
const bytes = new RIPEMD160().update(hexToBytes(hex)).digest('hex')
return bytesToHex(bytes)
}
export default ripemd