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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 "chromeos/ash/components/network/cellular_utils.h"
#include <algorithm>
#include "ash/constants/ash_features.h"
#include "base/containers/flat_map.h"
#include "base/containers/flat_set.h"
#include "base/logging.h"
#include "base/strings/strcat.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "chromeos/ash/components/cryptohome/system_salt_getter.h"
#include "chromeos/ash/components/dbus/hermes/hermes_euicc_client.h"
#include "chromeos/ash/components/dbus/hermes/hermes_manager_client.h"
#include "chromeos/ash/components/dbus/hermes/hermes_profile_client.h"
#include "chromeos/ash/components/network/cellular_esim_profile.h"
#include "chromeos/ash/components/network/network_handler.h"
#include "chromeos/ash/components/network/network_profile.h"
#include "chromeos/ash/components/network/network_profile_handler.h"
#include "crypto/sha2.h"
namespace ash {
namespace cellular_utils {
const char kSmdsGsma[] = "1$lpa.ds.gsma.com$";
const char kSmdsStork[] = "1$prod.smds.rsp.goog$";
const char kSmdsAndroidProduction[] = "1$lpa.live.esimdiscovery.com$";
const char kSmdsAndroidStaging[] = "1$lpa.live.esimdiscovery.dev$";
} // namespace cellular_utils
namespace {
const char kNonShillCellularNetworkPathPrefix[] = "/non-shill-cellular/";
std::string GetLogSafeEid(const std::string& eid) {
const SystemSaltGetter::RawSalt* salt = SystemSaltGetter::Get()->GetRawSalt();
if (!salt) {
return std::string();
}
return crypto::SHA256HashString(
eid + SystemSaltGetter::ConvertRawSaltToHexString(*salt));
}
} // namespace
base::flat_set<dbus::ObjectPath> GetProfilePathsFromEuicc(
HermesEuiccClient::Properties* euicc_properties) {
base::flat_set<dbus::ObjectPath> profile_paths;
for (const dbus::ObjectPath& path : euicc_properties->profiles().value()) {
profile_paths.insert(path);
}
return profile_paths;
}
CellularESimProfile::State FromProfileState(hermes::profile::State state) {
switch (state) {
case hermes::profile::State::kPending:
return CellularESimProfile::State::kPending;
case hermes::profile::State::kInactive:
return CellularESimProfile::State::kInactive;
case hermes::profile::State::kActive:
return CellularESimProfile::State::kActive;
default:
NOTREACHED() << "Unexpected Hermes profile state: " << state;
}
}
std::vector<CellularESimProfile> GenerateProfilesFromEuicc(
const dbus::ObjectPath& euicc_path) {
std::vector<CellularESimProfile> profiles;
HermesEuiccClient::Properties* euicc_properties =
HermesEuiccClient::Get()->GetProperties(euicc_path);
std::string eid = euicc_properties->eid().value();
for (const dbus::ObjectPath& profile_path :
GetProfilePathsFromEuicc(euicc_properties)) {
HermesProfileClient::Properties* profile_properties =
HermesProfileClient::Get()->GetProperties(profile_path);
// Hermes only exposes eSIM profiles with relevant profile class. e.g.
// Test profiles are exposed only when Hermes is put into test mode.
// No additional profile filtering is done on Chrome side.
profiles.emplace_back(
FromProfileState(profile_properties->state().value()), profile_path,
eid, profile_properties->iccid().value(),
base::UTF8ToUTF16(profile_properties->name().value()),
base::UTF8ToUTF16(profile_properties->nick_name().value()),
base::UTF8ToUTF16(profile_properties->service_provider().value()),
profile_properties->activation_code().value());
}
return profiles;
}
const base::flat_map<int32_t, std::string> GetESimSlotToEidMap() {
base::flat_map<int32_t, std::string> esim_slot_to_eid;
const std::vector<dbus::ObjectPath>& available_euiccs =
HermesManagerClient::Get()->GetAvailableEuiccs();
VLOG(1) << "GetESimSlotToEidMap(): Num available EUICCs: "
<< available_euiccs.size();
for (auto& euicc_path : available_euiccs) {
HermesEuiccClient::Properties* properties =
HermesEuiccClient::Get()->GetProperties(euicc_path);
int32_t slot_id = properties->physical_slot().value();
std::string eid = properties->eid().value();
esim_slot_to_eid.emplace(slot_id, eid);
VLOG(1) << "EUICC: " << euicc_path.value() << ", slot id: " << slot_id
<< ", eid: " << GetLogSafeEid(eid);
}
return esim_slot_to_eid;
}
namespace cellular_utils {
std::vector<CellularESimProfile> GenerateProfilesFromHermes() {
std::vector<CellularESimProfile> profiles;
for (const dbus::ObjectPath& euicc_path :
HermesManagerClient::Get()->GetAvailableEuiccs()) {
std::vector<CellularESimProfile> profiles_from_euicc =
GenerateProfilesFromEuicc(euicc_path);
std::ranges::copy(profiles_from_euicc, std::back_inserter(profiles));
}
return profiles;
}
const DeviceState::CellularSIMSlotInfos GetSimSlotInfosWithUpdatedEid(
const DeviceState* device) {
const base::flat_map<int32_t, std::string> esim_slot_to_eid =
GetESimSlotToEidMap();
DeviceState::CellularSIMSlotInfos sim_slot_infos = device->GetSimSlotInfos();
VLOG(1) << "GetSimSlotInfosWithUpdatedEid(): Num SIM slot infos: "
<< sim_slot_infos.size();
for (auto& sim_slot_info : sim_slot_infos) {
const std::string shill_provided_eid = sim_slot_info.eid;
VLOG(1) << "SIM slot id: " << sim_slot_info.slot_id
<< ", Shill provided eid: " << GetLogSafeEid(shill_provided_eid);
// If there is no associated |slot_id| in the map, the SIM slot info refers
// to a pSIM, and the Hermes provided data is irrelevant.
auto it = esim_slot_to_eid.find(sim_slot_info.slot_id);
if (it == esim_slot_to_eid.end())
continue;
const std::string hermes_provided_eid = it->second;
if (!shill_provided_eid.empty() &&
hermes_provided_eid != shill_provided_eid) {
LOG(ERROR) << "Hermes provided EID of " << hermes_provided_eid
<< " does not match Shill provided non-empty EID of "
<< shill_provided_eid << ". Defaulting to Shill provided EID.";
} else {
sim_slot_info.eid = hermes_provided_eid;
}
}
return sim_slot_infos;
}
bool IsSimPrimary(const std::string& iccid, const DeviceState* device) {
for (const auto& sim_slot_info : device->GetSimSlotInfos()) {
if (sim_slot_info.iccid == iccid && sim_slot_info.primary) {
return true;
}
}
return false;
}
std::string GenerateStubCellularServicePath(const std::string& iccid) {
return base::StrCat({kNonShillCellularNetworkPathPrefix, iccid});
}
const NetworkProfile* GetCellularProfile(
const NetworkProfileHandler* network_profile_handler) {
DCHECK(network_profile_handler);
return network_profile_handler->GetProfileForUserhash(
/*userhash=*/std::string());
}
bool IsStubCellularServicePath(const std::string& service_path) {
return base::StartsWith(service_path, kNonShillCellularNetworkPathPrefix);
}
std::optional<dbus::ObjectPath> GetCurrentEuiccPath() {
// Always use the first Euicc if Hermes only exposes one Euicc.
// If useSecondEuicc flag is set and there are two Euicc available,
// use the second available Euicc.
const std::vector<dbus::ObjectPath>& euicc_paths =
HermesManagerClient::Get()->GetAvailableEuiccs();
if (euicc_paths.empty())
return std::nullopt;
if (euicc_paths.size() == 1)
return euicc_paths[0];
bool use_second_euicc =
base::FeatureList::IsEnabled(features::kCellularUseSecondEuicc);
return use_second_euicc ? euicc_paths[1] : euicc_paths[0];
}
std::vector<std::string> GetSmdsActivationCodes() {
std::vector<std::string> activation_codes;
if (features::ShouldUseStorkSmds()) {
activation_codes.emplace_back(kSmdsStork);
}
if (features::ShouldUseAndroidStagingSmds()) {
activation_codes.emplace_back(kSmdsAndroidStaging);
}
if (activation_codes.empty()) {
activation_codes = {
kSmdsAndroidProduction,
kSmdsGsma,
};
}
return activation_codes;
}
} // namespace cellular_utils
} // namespace ash
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