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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/webauthn/core/browser/immediate_request_rate_limiter.h"
#include <memory>
#include <string>
#include "base/time/time.h"
#include "components/webauthn/core/browser/rate_limiter_slide_window.h"
#include "device/fido/features.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "url/origin.h"
namespace {
constexpr size_t kBucketCount = 1;
}
namespace webauthn {
ImmediateRequestRateLimiter::ImmediateRequestRateLimiter() = default;
ImmediateRequestRateLimiter::~ImmediateRequestRateLimiter() = default;
bool ImmediateRequestRateLimiter::IsRequestAllowed(const url::Origin& origin) {
if (!base::FeatureList::IsEnabled(
device::kWebAuthnImmediateRequestRateLimit)) {
return true;
}
if (origin.host() == "localhost") {
return true;
}
std::string relying_party =
net::registry_controlled_domains::GetDomainAndRegistry(
origin, net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
CHECK(!relying_party.empty());
auto it = rate_limits_.find(relying_party);
if (it == rate_limits_.end()) {
int max_requests =
device::kWebAuthnImmediateRequestRateLimitMaxRequests.Get();
int window_seconds =
device::kWebAuthnImmediateRequestRateLimitWindowSeconds.Get();
base::TimeDelta time_window = base::Seconds(window_seconds);
// Use try_emplace to insert the new rate limiter.
it = rate_limits_
.try_emplace(relying_party,
std::make_unique<webauthn::RateLimiterSlideWindow>(
max_requests, time_window, kBucketCount))
.first;
}
return it->second->Acquire(1);
}
} // namespace webauthn
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