sodium-javascript/helpers.js

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JavaScript
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/* 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
}