httpsrichardy.federation/Applications/Backend/Source/HttpsRichardy.Federation.Application/Validators/Identity/ClientAuthenticationCredentialsValidator.cs at bf5ee3331e323cc72ecbdc8faa049dd3da3e9823 · https-richardy/httpsrichardy.federation · GitHub

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namespace HttpsRichardy.Federation.Application.Validators.Identity;

public sealed class ClientAuthenticationCredentialsValidator : AbstractValidator<ClientAuthenticationCredentials>
{
    public ClientAuthenticationCredentialsValidator()
    {
        RuleFor(credential => credential.GrantType)
            .NotEmpty()
            .WithMessage("grant type must not be empty.")
            .Must(grant => grant == SupportedGrantType.ClientCredentials || grant == SupportedGrantType.AuthorizationCode)
            .WithMessage("grant type must be either 'client_credentials' or 'authorization_code'.");

        When(credential => credential.GrantType == SupportedGrantType.ClientCredentials, () =>
        {
            RuleFor(credential => credential.ClientId)
            .NotEmpty()
            .WithMessage("client identifier must not be empty.")
            .MaximumLength(200)
            .WithMessage("client identifier must be at most 200 characters long.");

            RuleFor(credential => credential.ClientSecret)
            .NotEmpty()
            .WithMessage("client secret must not be empty.")
            .MaximumLength(500)
            .WithMessage("client secret must be at most 500 characters long.");
        });

        When(credential => credential.GrantType == SupportedGrantType.AuthorizationCode, () =>
        {
            RuleFor(credential => credential.ClientId)
                .NotEmpty()
                .WithMessage("client identifier must not be empty.")
                .MaximumLength(200)
                .WithMessage("client identifier must be at most 200 characters long.");

            RuleFor(credential => credential.Code)
                .NotEmpty()
                .WithMessage("code must not be empty.");

            RuleFor(credential => credential.CodeVerifier)
                .NotEmpty()
                .WithMessage("code verifier must not be empty.")
                .MinimumLength(43)
                .WithMessage("code verifier must be at least 43 characters.")
                .MaximumLength(128)
                .WithMessage("code verifier must be at most 128 characters.")
                .Matches("^[a-zA-Z0-9_-]+$")
                .WithMessage("code verifier must be base64url encoded.");
        });
    }
}