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/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <aidl/Gtest.h>
#include <aidl/Vintf.h>
#include <aidl/android/hardware/secure_element/BnSecureElementCallback.h>
#include <aidl/android/hardware/secure_element/ISecureElement.h>
#include <android-base/logging.h>
#include <android/binder_manager.h>
#include <android/binder_process.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <chrono>
#include <condition_variable>
#include <mutex>
using namespace std::chrono_literals;
using aidl::android::hardware::secure_element::BnSecureElementCallback;
using aidl::android::hardware::secure_element::ISecureElement;
using aidl::android::hardware::secure_element::LogicalChannelResponse;
using ndk::ScopedAStatus;
using ndk::SharedRefBase;
using ndk::SpAIBinder;
using testing::ElementsAre;
using testing::ElementsAreArray;
#define EXPECT_OK(status) \
do { \
auto status_impl = (status); \
EXPECT_TRUE(status_impl.isOk()) << status_impl.getDescription(); \
} while (false)
#define EXPECT_ERR(status) \
do { \
auto status_impl = (status); \
EXPECT_FALSE(status_impl.isOk()) << status_impl.getDescription(); \
} while (false)
// APDU defined in CTS tests.
// The applet selected with kSelectableAid will return 256 bytes of data
// in response.
static const std::vector<uint8_t> kDataApdu = {
0x00, 0x08, 0x00, 0x00, 0x00,
};
// Selectable test AID defined in CTS tests.
static const std::vector<uint8_t> kSelectableAid = {
0xA0, 0x00, 0x00, 0x04, 0x76, 0x41, 0x6E, 0x64,
0x72, 0x6F, 0x69, 0x64, 0x43, 0x54, 0x53, 0x31,
};
// Non-selectable test AID defined in CTS tests.
static const std::vector<uint8_t> kNonSelectableAid = {
0xA0, 0x00, 0x00, 0x04, 0x76, 0x41, 0x6E, 0x64,
0x72, 0x6F, 0x69, 0x64, 0x43, 0x54, 0x53, 0xFF,
};
class MySecureElementCallback : public BnSecureElementCallback {
public:
ScopedAStatus onStateChange(bool state, const std::string& debugReason) override {
{
std::unique_lock<std::mutex> l(m);
(void)debugReason;
history.push_back(state);
}
cv.notify_one();
return ScopedAStatus::ok();
};
void expectCallbackHistory(std::vector<bool>&& want) {
std::unique_lock<std::mutex> l(m);
cv.wait_for(l, 5s, [&]() { return history.size() >= want.size(); });
EXPECT_THAT(history, ElementsAreArray(want));
}
void resetCallbackHistory() {
std::unique_lock<std::mutex> l(m);
history.clear();
}
private:
std::mutex m; // guards history
std::condition_variable cv;
std::vector<bool> history;
};
class SecureElementAidl : public ::testing::TestWithParam<std::string> {
public:
void SetUp() override {
SpAIBinder binder = SpAIBinder(AServiceManager_waitForService(GetParam().c_str()));
secure_element_ = ISecureElement::fromBinder(binder);
ASSERT_NE(secure_element_, nullptr);
secure_element_callback_ = SharedRefBase::make<MySecureElementCallback>();
ASSERT_NE(secure_element_callback_, nullptr);
EXPECT_OK(secure_element_->init(secure_element_callback_));
secure_element_callback_->expectCallbackHistory({true});
// Check if the basic channel is supported by the bound SE.
std::vector<uint8_t> basic_channel_response;
auto status =
secure_element_->openBasicChannel(kSelectableAid, 0x00, &basic_channel_response);
if (status.isOk()) {
basic_channel_supported_ = true;
secure_element_->closeChannel(0);
}
}
void TearDown() override {
secure_element_callback_->resetCallbackHistory();
EXPECT_OK(secure_element_->reset());
secure_element_callback_->expectCallbackHistory({false, true});
secure_element_ = nullptr;
secure_element_callback_ = nullptr;
}
// Call transmit with kDataApdu and the selected channel number.
// Return the response sstatus code.
uint16_t transmit(uint8_t channel_number) {
std::vector<uint8_t> apdu = kDataApdu;
std::vector<uint8_t> response;
// Edit the channel number into the CLA header byte.
if (channel_number < 4) {
apdu[0] |= channel_number;
} else {
apdu[0] |= (channel_number - 4) | 0x40;
}
// transmit() will return an empty response with the error
// code CHANNEL_NOT_AVAILABLE when the SE cannot be
// communicated with.
auto status = secure_element_->transmit(apdu, &response);
if (!status.isOk()) {
return 0x6881;
}
// transmit() will return a response containing at least
// the APDU response status otherwise.
EXPECT_GE(response.size(), 2u);
uint16_t apdu_status =
(response[response.size() - 2] << 8) | (response[response.size() - 1] << 0);
// When the command is successful the response
// must contain 256 bytes of data.
if (apdu_status == 0x9000) {
EXPECT_EQ(response.size(), 258);
}
return apdu_status;
}
std::shared_ptr<ISecureElement> secure_element_;
std::shared_ptr<MySecureElementCallback> secure_element_callback_;
bool basic_channel_supported_{false};
};
TEST_P(SecureElementAidl, init) {
// init(nullptr) shall fail.
EXPECT_ERR(secure_element_->init(nullptr));
// init with a valid callback pointer shall succeed.
EXPECT_OK(secure_element_->init(secure_element_callback_));
secure_element_callback_->expectCallbackHistory({true, true});
}
TEST_P(SecureElementAidl, reset) {
std::vector<uint8_t> basic_channel_response;
LogicalChannelResponse logical_channel_response;
// reset called after init shall succeed.
if (basic_channel_supported_) {
EXPECT_OK(secure_element_->openBasicChannel(kSelectableAid, 0x00, &basic_channel_response));
}
EXPECT_OK(secure_element_->openLogicalChannel(kSelectableAid, 0x00, &logical_channel_response));
EXPECT_OK(secure_element_->reset());
secure_element_callback_->expectCallbackHistory({true, false, true});
// All opened channels must be closed.
if (basic_channel_supported_) {
EXPECT_NE(transmit(0), 0x9000);
}
EXPECT_NE(transmit(logical_channel_response.channelNumber), 0x9000);
}
TEST_P(SecureElementAidl, isCardPresent) {
bool res = false;
// isCardPresent called after init shall succeed.
EXPECT_OK(secure_element_->isCardPresent(&res));
EXPECT_TRUE(res);
}
TEST_P(SecureElementAidl, getAtr) {
std::vector<uint8_t> atr;
// getAtr called after init shall succeed.
// The ATR has size between 0 and 32 bytes.
EXPECT_OK(secure_element_->getAtr(&atr));
EXPECT_LE(atr.size(), 32u);
}
TEST_P(SecureElementAidl, openBasicChannel) {
std::vector<uint8_t> response;
if (!basic_channel_supported_) {
return;
}
// openBasicChannel called with an invalid AID shall fail.
EXPECT_ERR(secure_element_->openBasicChannel(kNonSelectableAid, 0x00, &response));
// openBasicChannel called after init shall succeed.
// The response size must be larger than 2 bytes as it includes the
// status code.
EXPECT_OK(secure_element_->openBasicChannel(kSelectableAid, 0x00, &response));
EXPECT_GE(response.size(), 2u);
// transmit called on the basic channel should succeed.
EXPECT_EQ(transmit(0), 0x9000);
// openBasicChannel called a second time shall fail.
// The basic channel can only be opened once.
EXPECT_ERR(secure_element_->openBasicChannel(kSelectableAid, 0x00, &response));
// openBasicChannel called after closing the basic channel shall succeed.
EXPECT_OK(secure_element_->closeChannel(0));
EXPECT_OK(secure_element_->openBasicChannel(kSelectableAid, 0x00, &response));
}
TEST_P(SecureElementAidl, openLogicalChannel) {
LogicalChannelResponse response;
// openLogicalChannel called with an invalid AID shall fail.
EXPECT_ERR(secure_element_->openLogicalChannel(kNonSelectableAid, 0x00, &response));
// openLogicalChannel called after init shall succeed.
// The response size must be larger than 2 bytes as it includes the
// status code. The channel number must be in the range 1-19.
EXPECT_OK(secure_element_->openLogicalChannel(kSelectableAid, 0x00, &response));
EXPECT_GE(response.selectResponse.size(), 2u);
EXPECT_GE(response.channelNumber, 1u);
EXPECT_LE(response.channelNumber, 19u);
// transmit called on the logical channel should succeed.
EXPECT_EQ(transmit(response.channelNumber), 0x9000);
}
TEST_P(SecureElementAidl, closeChannel) {
std::vector<uint8_t> basic_channel_response;
LogicalChannelResponse logical_channel_response;
// closeChannel called on non-existing basic or logical channel
// shall fail.
EXPECT_ERR(secure_element_->closeChannel(0));
EXPECT_ERR(secure_element_->closeChannel(1));
// closeChannel called on basic channel closes the basic channel.
if (basic_channel_supported_) {
EXPECT_OK(secure_element_->openBasicChannel(kSelectableAid, 0x00, &basic_channel_response));
EXPECT_OK(secure_element_->closeChannel(0));
// transmit called on the basic channel should fail.
EXPECT_NE(transmit(0), 0x9000);
}
// closeChannel called on logical channel closes the logical channel.
EXPECT_OK(secure_element_->openLogicalChannel(kSelectableAid, 0x00, &logical_channel_response));
EXPECT_OK(secure_element_->closeChannel(logical_channel_response.channelNumber));
// transmit called on the logical channel should fail.
EXPECT_NE(transmit(logical_channel_response.channelNumber), 0x9000);
}
TEST_P(SecureElementAidl, transmit) {
std::vector<uint8_t> response;
LogicalChannelResponse logical_channel_response;
/* Temporaly disable this check to clarify Basic Channel behavior (b/300502872)
// Note: no channel is opened for this test
// transmit() will return an empty response with the error
// code CHANNEL_NOT_AVAILABLE when the SE cannot be
// communicated with.
EXPECT_ERR(secure_element_->transmit(kDataApdu, &response));
*/
EXPECT_OK(secure_element_->openLogicalChannel(kSelectableAid, 0x00, &logical_channel_response));
EXPECT_GE(logical_channel_response.selectResponse.size(), 2u);
EXPECT_GE(logical_channel_response.channelNumber, 1u);
EXPECT_LE(logical_channel_response.channelNumber, 19u);
// transmit called on the logical channel should succeed.
EXPECT_EQ(transmit(logical_channel_response.channelNumber), 0x9000);
}
GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(SecureElementAidl);
INSTANTIATE_TEST_SUITE_P(
SecureElement, SecureElementAidl,
testing::ValuesIn(android::getAidlHalInstanceNames(ISecureElement::descriptor)),
android::PrintInstanceNameToString);
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
ABinderProcess_setThreadPoolMaxThreadCount(1);
ABinderProcess_startThreadPool();
return RUN_ALL_TESTS();
}