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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/connection_endpoint_metadata.h"
#include <string>
#include <utility>
#include <vector>
#include "base/base64.h"
#include "base/values.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
namespace net {
namespace {
const char kSupportedProtocolAlpnsKey[] = "supported_protocol_alpns";
const char kEchConfigListKey[] = "ech_config_list";
const char kTargetNameKey[] = "target_name";
} // namespace
ConnectionEndpointMetadata::ConnectionEndpointMetadata() = default;
ConnectionEndpointMetadata::~ConnectionEndpointMetadata() = default;
ConnectionEndpointMetadata::ConnectionEndpointMetadata(
const ConnectionEndpointMetadata&) = default;
ConnectionEndpointMetadata::ConnectionEndpointMetadata(
ConnectionEndpointMetadata&&) = default;
base::Value ConnectionEndpointMetadata::ToValue() const {
base::Value::Dict dict;
base::Value::List alpns_list;
for (const std::string& alpn : supported_protocol_alpns) {
alpns_list.Append(alpn);
}
dict.Set(kSupportedProtocolAlpnsKey, std::move(alpns_list));
dict.Set(kEchConfigListKey, base::Base64Encode(ech_config_list));
if (!target_name.empty()) {
dict.Set(kTargetNameKey, target_name);
}
return base::Value(std::move(dict));
}
// static
absl::optional<ConnectionEndpointMetadata>
ConnectionEndpointMetadata::FromValue(const base::Value& value) {
const base::Value::Dict* dict = value.GetIfDict();
if (!dict)
return absl::nullopt;
const base::Value::List* alpns_list =
dict->FindList(kSupportedProtocolAlpnsKey);
const std::string* ech_config_list_value =
dict->FindString(kEchConfigListKey);
const std::string* target_name_value = dict->FindString(kTargetNameKey);
if (!alpns_list || !ech_config_list_value)
return absl::nullopt;
ConnectionEndpointMetadata metadata;
std::vector<std::string> alpns;
for (const base::Value& alpn : *alpns_list) {
if (!alpn.is_string())
return absl::nullopt;
metadata.supported_protocol_alpns.push_back(alpn.GetString());
}
absl::optional<std::vector<uint8_t>> decoded =
base::Base64Decode(*ech_config_list_value);
if (!decoded)
return absl::nullopt;
metadata.ech_config_list = std::move(*decoded);
if (target_name_value) {
metadata.target_name = *target_name_value;
}
return metadata;
}
} // namespace net
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