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1 | 1 | const runningOnBrowser = typeof window !== 'undefined' |
2 | 2 |
|
3 | | -// Pad out with standard base64 required padding characters if missing |
4 | | -const base64AddPadding = base64String => { |
5 | | - const missingPadding = '='.repeat((4 - base64String.length % 4) % 4) |
6 | | - return base64String + missingPadding |
7 | | -} |
8 | | - |
9 | | -// Replace non-url compatible chars with base64 standard chars |
10 | | -const base64UrlDecode = base64UrlString => { |
11 | | - return base64UrlString |
| 3 | +const base64urlToBase64 = base64UrlString => { |
| 4 | + // Replace non-url compatible chars with base64 standard chars |
| 5 | + const base64 = base64UrlString |
12 | 6 | .replace(/-/g, '+') |
13 | 7 | .replace(/_/g, '/') |
| 8 | + |
| 9 | + // Pad out with standard base64 required padding characters if missing |
| 10 | + const missingPadding = '='.repeat((4 - base64.length % 4) % 4) |
| 11 | + |
| 12 | + return base64 + missingPadding |
14 | 13 | } |
15 | 14 |
|
16 | | -const atob = data => { |
| 15 | +const base64Decode = data => { |
17 | 16 | if (runningOnBrowser) { |
18 | | - return window.atob(data) |
| 17 | + return atob(data) |
19 | 18 | } |
20 | 19 | // atob polyfill for Node |
21 | 20 | return Buffer.from(data, 'base64').toString('binary') |
22 | 21 | } |
23 | 22 |
|
24 | 23 | const base64ToUint8Array = base64String => { |
25 | 24 | // base64 sanitizing |
26 | | - const base64 = base64UrlDecode(base64AddPadding(base64String)) |
| 25 | + const base64 = base64urlToBase64(base64String) |
27 | 26 |
|
28 | 27 | // base64 decoding |
29 | | - const rawData = atob(base64) |
| 28 | + const rawData = base64Decode(base64) |
30 | 29 |
|
31 | 30 | // Converting raw data to Uint8Array |
32 | 31 | return Uint8Array.from(rawData, char => char.charCodeAt(0)) |
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