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[Security] Return null instead of empty username to fix deprecation notice #59640

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Merged
merged 1 commit into from
Feb 5, 2025
Merged

[Security] Return null instead of empty username to fix deprecation notice #59640

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2 changes: 1 addition & 1 deletion src/Symfony/Component/Security/Http/Authenticator/RemoteUserAuthenticator.php
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,6 @@ protected function extractUsername(Request $request): ?string
throw new BadCredentialsException(sprintf('User key was not found: "%s".', $this->userKey));
}

return $request->server->get($this->userKey);
return $request->server->get($this->userKey) ?: null;
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@phasdev phasdev Jan 28, 2025 •
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Looking at how the method is used I wonder if we shouldn’t throw a BadCredentialsException here then.
(xabbuh's comment on previous PR)

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@phasdev phasdev Jan 28, 2025 •
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Throwing an exception would be consistent with the FormLoginAuthenticator's behaviour :

symfony/src/Symfony/Component/Security/Http/Authenticator/FormLoginAuthenticator.php

Lines 130 to 131 in 0deaa1e

if ('' === $credentials['username']) {
throw new BadCredentialsException(\sprintf('The key "%s" must be a non-empty string.', $this->options['username_parameter']));

OTOH the base class' abstract extractUsername() returns a nullable string and the null check in supports() indicates this is due to being unable to extract a username. Other users who've extended the base class may expect that behaviour, so throwing an exception (in a reference implementation) may be confusing.

symfony/src/Symfony/Component/Security/Http/Authenticator/AbstractPreAuthenticatedAuthenticator.php

Line 53 in 0deaa1e

abstract protected function extractUsername(Request $request): ?string;

symfony/src/Symfony/Component/Security/Http/Authenticator/AbstractPreAuthenticatedAuthenticator.php

Lines 67 to 68 in 0deaa1e

if (null === $username) {
$this->logger?->debug('Skipping pre-authenticated authenticator no username could be extracted.', ['authenticator' => static::class]);

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Makes sense to me

}
}
1 change: 1 addition & 0 deletions src/Symfony/Component/Security/Http/Tests/Authenticator/RemoteUserAuthenticatorTest.php
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Expand Up @@ -36,6 +36,7 @@ public function testSupportNoUser()
$authenticator = new RemoteUserAuthenticator(new InMemoryUserProvider(), new TokenStorage(), 'main');

$this->assertFalse($authenticator->supports($this->createRequest([])));
$this->assertFalse($authenticator->supports($this->createRequest(['REMOTE_USER' => ''])));
}

public function testSupportTokenStorageWithToken()
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