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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/ip_protection/common/probabilistic_reveal_token_registry.h"
#include <string>
#include "base/containers/flat_set.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "base/values.h"
#include "net/base/features.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "url/gurl.h"
namespace ip_protection {
namespace {
constexpr char kDomainsFieldName[] = "domains";
} // namespace
ProbabilisticRevealTokenRegistry::ProbabilisticRevealTokenRegistry() {
if (net::features::kUseCustomProbabilisticRevealTokenRegistry.Get()) {
std::string custom_registry_csv =
net::features::kCustomProbabilisticRevealTokenRegistry.Get();
base::StringTokenizer registry_tokenizer(custom_registry_csv, ",");
while (registry_tokenizer.GetNext()) {
custom_domains_.insert(base::ToLowerASCII(registry_tokenizer.token()));
}
}
}
ProbabilisticRevealTokenRegistry::~ProbabilisticRevealTokenRegistry() = default;
ProbabilisticRevealTokenRegistry::ProbabilisticRevealTokenRegistry(
const ProbabilisticRevealTokenRegistry&) = default;
ProbabilisticRevealTokenRegistry& ProbabilisticRevealTokenRegistry::operator=(
const ProbabilisticRevealTokenRegistry&) = default;
bool ProbabilisticRevealTokenRegistry::IsRegistered(const GURL& request_url) {
// Check if the eTLD+1 of the request URL is registered.
std::string request_domain =
net::registry_controlled_domains::GetDomainAndRegistry(
request_url,
net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
// Remove the trailing dot if it exists.
if (request_domain.size() > 0 && request_domain.back() == '.') {
request_domain = request_domain.substr(0, request_domain.length() - 1);
}
if (net::features::kUseCustomProbabilisticRevealTokenRegistry.Get()) {
return custom_domains_.contains(base::ToLowerASCII(request_domain));
}
return domains_.contains(base::ToLowerASCII(request_domain));
}
void ProbabilisticRevealTokenRegistry::UpdateRegistry(
base::Value::Dict registry) {
domains_.clear();
base::Value* domains = registry.Find(kDomainsFieldName);
if (!domains) {
return;
}
base::Value::List* domain_list = domains->GetIfList();
if (!domain_list) {
return;
}
for (const base::Value& domain : *domain_list) {
const std::string* domain_string = domain.GetIfString();
if (!domain_string) {
return;
}
domains_.insert(base::ToLowerASCII(*domain_string));
}
}
} // namespace ip_protection
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