forked from https://github.com/symfony/symfony
1b300985ff
This PR was merged into the 3.4 branch.
Discussion
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[Security] Argon2i Password Encoder
| Q | A
| ------------- | ---
| Branch? | master
| Bug fix? | no
| New feature? | yes
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets |
| License | MIT
| Doc PR | WIP
Since the [libsodium RFC](https://wiki.php.net/rfc/libsodium) passed with flying colours, I'd like to kick start a discussion about adding Argon2i as a password encoder to the security component. The initial code proposal in this PR supports both the upcoming public API confirmed for PHP 7.2, and the [libsodium PECL extension](https://pecl.php.net/package/libsodium) for those below 7.2 (available for PHP 5.4+).
#### Concerns
- Should the test cover hash length? At the moment the result of Argon2i is 96 characters, but because the hashing parameters are included in the result (`$argon2i$v=19$m=32768,t=4,p=1$...`) this is not guaranteed.
- I've used one password encoder class because the result *should* be the same whether running natively in 7.2 or from the PECL extension, but should the logic be split out into separate private methods (like `Argon2iPasswordEncoder::encodePassword()`) or not (like in `Argon2iPasswordEncoder::isPasswordValid()`)? Since I can't really find anything concrete on Symfony choosing one way over another I'm assuming it's down to personal preference?
#### The Future
Whilst the libsodium RFC has been approved and the public API confirmed, there has been no confirmation of Argon2i becoming an official algorithm for `passhword_hash()`. If that is confirmed, then the implementation should *absolutely* use the native `password_*` functions since the `sodium_*` functions do not have an equivalent to the `password_needs_rehash()` function.
Any feedback would be greatly appreciated 😃
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| UPGRADE-4.0.md | ||
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