1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
import { assertEmptyRest } from './assert.js'
import { typedView } from './array.js'
import { E_STRING } from './fallback/_utils.js'
import * as js from './fallback/base32.js'
// See https://datatracker.ietf.org/doc/html/rfc4648
// 8 chars per 5 bytes
export const toBase32 = (arr, { padding = false } = {}) => js.toBase32(arr, false, padding)
export const toBase32hex = (arr, { padding = false } = {}) => js.toBase32(arr, true, padding)
// By default, valid padding is accepted but not required
export function fromBase32(str, options) {
if (!options) return fromBase32common(str, false, 'both', 'uint8', null)
const { format = 'uint8', padding = 'both', ...rest } = options
return fromBase32common(str, false, padding, format, rest)
}
export function fromBase32hex(str, options) {
if (!options) return fromBase32common(str, true, 'both', 'uint8', null)
const { format = 'uint8', padding = 'both', ...rest } = options
return fromBase32common(str, true, padding, format, rest)
}
function fromBase32common(str, isBase32Hex, padding, format, rest) {
if (typeof str !== 'string') throw new TypeError(E_STRING)
if (rest !== null) assertEmptyRest(rest)
if (padding === true) {
if (str.length % 8 !== 0) throw new SyntaxError(js.E_PADDING)
} else if (padding === false) {
if (str.endsWith('=')) throw new SyntaxError('Did not expect padding in base32 input')
} else if (padding !== 'both') {
throw new TypeError('Invalid padding option')
}
return typedView(js.fromBase32(str, isBase32Hex), format)
}
|
