Senior LevelLaravel
How do you implement custom OAuth2 Grant Types in Laravel Passport?
❓ Interview Prompt: Explain extending League OAuth2 Server in Passport, custom grant types (AbstractGrant), user authentication, and token issuance.
When building enterprise identity platforms, default OAuth2 grants (authorization code, client credentials) may be insufficient. Custom Grant Types allow authenticating via custom tokens (e.g. mobile OTP or biometric tokens):
Steps:
1
Extend 'LeagueOAuth2ServerGrantAbstractGrant'.
2
Implement 'validateGrantType()', verifying the custom credentials.
3
Register grant in 'PassportServiceProvider' via 'app(AuthorizationServer::class)->enableGrantType(...)'.
Code Implementation Example
php
<?php
namespace AppGrants;
use LeagueOAuth2ServerGrantAbstractGrant;
use PsrHttpMessageServerRequestInterface;
class MobileOtpGrant extends AbstractGrant
{
public function getIdentifier(): string {
return 'mobile_otp';
}
// Custom OTP validation logic...
}💡Custom OAuth2 Grant Type implementation extending AbstractGrant.
🎯 Interview Key Takeaway
Extend League OAuth2 Server AbstractGrant to implement custom OAuth2 authorization grant types in Passport.
#Passport#Custom Grant#OAuth2#Senior
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