Re: base64url format

On 09.01.2023 at 19:49, Sara Golemon wrote: > I've been working with JWTs lately and that means working with Base64URL > format. (Ref: https://www.rfc-editor.org/rfc/rfc4648#section-5 > ) > This is essentially the same thing as normal Base64, but instead of '+' and > '/', it uses '-' and '_', respectively. It also allows leaving > off the > training '=' padding characters. > > So far, I've just been including polyfills like this: > > function base64url_decode(string $str): string { > return base64_decode(str_pad(strtr($str, '-_', '+/'), (4 - > (strlen($str) % 4)) % 4, '=')); > } > > function base64_encode(string $str): string { > return rtrim(strtr(base64_encode($str), '+/', '-_'), '='); > } > > These work fine, but they create a LOT of string copies along the way which > shouldn't be necessary. > Would anyone mind if skipped RFC and just added > base64url_encode() and > base64url_decode() to PHP 8.3? > > Can hold a vote if anyone objects, but this seems fairly non-controversial. IMO, go with a PR first. If that is controversial, an RFC can still be done. I, personally, would be more interested in base32, but that's another story. -- Christoph M. Becker