sodium-javascript/helpers.js
Emil Bay a338ae9f9d
Missing helpers (#24)
* Detach buffers by sending to an empty message channel

* Move helpers out

* fix import

* export helpers

* Try browser testing

* messagechannel check

* xvfb-run --auto-servernum npm run test-browser fails weirdly on ci, removing

Co-authored-by: Mathias Buus <mathiasbuus@gmail.com>
2020-08-12 15:39:14 +02:00

32 lines
607 B
JavaScript

/* eslint-disable camelcase */
const assert = require('nanoassert')
const { vn } = require('./crypto_verify')
function sodium_increment (n) {
const nlen = n.byteLength
var c = 1
for (var i = 0; i < nlen; i++) {
c += n[i]
n[i] = c
c >>= 8
}
}
function sodium_memcmp (a, b) {
assert(a.byteLength === b.byteLength, 'buffers must be the same size')
return vn(a, 0, b, 0, a.byteLength) === 0
}
function sodium_is_zero (arr) {
var d = 0
for (let i = 0; i < arr.length; i++) d |= arr[i]
return d === 0
}
module.exports = {
sodium_increment,
sodium_memcmp,
sodium_is_zero
}