https://github.com/jedisct1/js-base64-ct

Safe Base64 encoding/decoding in pure JavaScript.
https://github.com/jedisct1/js-base64-ct

base64 constant-time javascript typescript

Last synced: about 2 months ago
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Safe Base64 encoding/decoding in pure JavaScript.

• Host: GitHub
• URL: https://github.com/jedisct1/js-base64-ct
• Owner: jedisct1
• License: mit
• Created: 2021-07-10T13:10:17.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2021-07-10T13:20:34.000Z (over 3 years ago)
• Last Synced: 2024-10-10T12:52:51.067Z (2 months ago)
• Topics: base64, constant-time, javascript, typescript
• Language: TypeScript
• Homepage:
• Size: 6.84 KB
• Stars: 16
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Safe Base64 codecs for JavaScript

A pure JavaScript port of the libsodium base64 codecs.

Features:

* Supports traditional and URL-safe variants, with or without padding

* Rejects non-canonical padding

* Constant-time (best-effort), suitable for encoding/decoding secrets

* Characters can be ignored by the decoder

Available on NPM: [base64-ct](https://www.npmjs.com/package/base64-ct)

Usage:

- Traditional alphabet, padding:

```js

const codec = new Base64(true);

const b64 = codec.encode(data);

const data2 = codec.decode(b64);

```

- Traditional alphabet, no padding:

```js

const codec = new Base64(false);

const b64 = codec.encode(data);

const data2 = codec.decode(b64);

```

- URL-safe, no padding:

```js

const codec = new Base64UrlSafe(false);

const b64 = codec.encode(data);

const data2 = codec.decode(b64);

```

- URL-safe, padding, ignoring spaces and `\n`:

```js

const codec = new Base64UrlSafe(true, " \n");

const b64 = codec.encode(data);

const data2 = codec.decode(b64);

```