mirror of
https://github.com/Evolution-X/hardware_interfaces
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4b780ebe46
The AIDL interface states that closeChannel must return FAILED if the channel is not opened. The default AIDL implementation did not respect this requirement either. Bug: 266384111 Test: m VtsHalSecureElementTargetTest Change-Id: I3e7142e6bbeb9d79cea2c109689da59c0615167a
717 lines
29 KiB
C++
717 lines
29 KiB
C++
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <aidl/android/hardware/secure_element/BnSecureElement.h>
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#include <android-base/hex.h>
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#include <android-base/logging.h>
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#include <android/binder_manager.h>
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#include <android/binder_process.h>
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#include <algorithm>
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using aidl::android::hardware::secure_element::BnSecureElement;
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using aidl::android::hardware::secure_element::ISecureElementCallback;
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using aidl::android::hardware::secure_element::LogicalChannelResponse;
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using android::base::HexString;
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using ndk::ScopedAStatus;
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static const std::vector<uint8_t> kIssuerSecurityDomainSelectResponse = {0x00, 0x00, 0x90, 0x00};
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namespace se {
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// Application identifier.
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using Aid = std::vector<uint8_t>;
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// ISO7816 APDU status codes.
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enum Status : uint16_t {
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SW_WRONG_DATA = 0x6A80,
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SW_LOGICAL_CHANNEL_NOT_SUPPORTED = 0x6881,
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SW_CONDITIONS_NOT_SATISFIED = 0x6985,
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SW_INCORRECT_P1P2 = 0x6A86,
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SW_BYTES_REMAINING_00 = 0x6100,
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SW_WRONG_LENGTH = 0x6700,
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SW_CORRECT_LENGTH_00 = 0x6C00,
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SW_INS_NOT_SUPPORTED = 0x6D00,
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SW_NO_ERROR = 0x9000,
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};
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// Type for raw APDUs.
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using RawApdu = std::vector<uint8_t>;
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// Wrap a command APDU (Application Processing Data Unit) to provide
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// accessors for header fields.
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struct Apdu {
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public:
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// Construct a command Apdu.
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Apdu(std::vector<uint8_t> packet) : bytes_(std::move(packet)) {
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CHECK(bytes_.size() >= kHeaderSize) << "command APDU created with invalid length";
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size_t payload_len = bytes_.size() - kHeaderSize;
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// TODO(b/123254068) - add support for extended command APDUs.
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// Pre compute Lc and Le.
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// Case 1: CLA | INS | P1 | P2
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if (payload_len == 0) {
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lc_ = 0;
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le_ = 0;
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return;
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}
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// Case 2: CLA | INS | P1 | P2 | Le
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// Le has a value of 1 to 255.
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if (payload_len == 1) {
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le_ = bytes_[kHeaderSize];
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le_ = le_ == 0 ? 256 : le_;
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lc_ = 0;
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return;
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}
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// Case 3: CLA | INS | P1 | P2 | Lc | Data
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// Lc is less than 256 bytes
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// of data, and Le is zero.
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lc_ = bytes_[kHeaderSize];
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if (payload_len <= (1 + lc_)) {
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le_ = 0;
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}
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// Case 4: CLA | INS | P1 | P2 | Lc | Data | Le
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// The legacy Case 4. Lc and Le
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// are less than 256 bytes of data.
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else {
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le_ = bytes_[bytes_.size() - 1];
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le_ = le_ == 0 ? 256 : le_;
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}
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}
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// Construct a response Apdu with data.
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static RawApdu CreateResponse(std::vector<uint8_t> data, Status status) {
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// Append status word.
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data.push_back(status >> 8);
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data.push_back(status);
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return data;
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}
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// Construct a response Apdu with no data.
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static RawApdu CreateResponse(Status status) {
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// Append status word.
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return std::vector<uint8_t>{static_cast<uint8_t>(status >> 8),
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static_cast<uint8_t>(status)};
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}
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// Return if command APDU is extended.
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// The ISO/IEC 7816-4:2013 specification defines an extended APDU as any APDU
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// whose payload data, response data or expected data length exceeds the 256
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// byte limit.
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bool IsExtended() const { return (bytes_.size() - kHeaderSize) > 256; }
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// Return if command APDU has payload bytes.
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bool HasPayload() const { return bytes_.size() > kHeaderSize; }
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uint8_t get_cla() const { return bytes_[0]; }
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uint8_t get_ins() const { return bytes_[1]; }
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uint8_t get_p1() const { return bytes_[2]; }
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uint8_t get_p2() const { return bytes_[3]; }
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// Return the channel number encoded in the CLA field.
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uint8_t get_channel_number() const {
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// Type 4 commands — Encode legacy ISO/IEC 7816-4 logical channel
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// information. Type 16 commands — Defined by the ISO/IEC 7816-4:2013
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// specification to
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// encode information for additional 16 logical channels in the card.
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uint8_t cla = get_cla();
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return (cla & 0x40) == 0 ? cla & 0x3 : 4 + (cla & 0xf);
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}
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// Return the length of the command data field.
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uint16_t get_lc() const { return lc_; }
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// Return the expected length of the response data field.
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// Le should be have the same format as Lc.
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uint16_t get_le() const { return le_; }
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// Get the pointer to the APDU raw data.
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std::vector<uint8_t> const& get_data() const { return bytes_; }
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private:
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// Size of command header, including CLA, INS, P1, P2 fields.
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const size_t kHeaderSize = 4;
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// Command or response buffer.
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std::vector<uint8_t> bytes_{};
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// Lengths of command data field and expected response data field.
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uint16_t lc_{0};
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uint16_t le_{0};
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};
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// Type of SE applets.
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class Applet {
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public:
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virtual ~Applet() {}
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// Called to inform this applet that it has been selected.
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virtual RawApdu Select(Aid const& aid, uint8_t p2) = 0;
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// Called by the Java Card runtime environment to process an
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// incoming APDU command. SELECT commands are processed by \ref select
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// instead.
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virtual RawApdu Process(Apdu const& apdu) = 0;
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};
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}; // namespace se
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// Implement the Google-eSE-test.cap test applet for passing OMAPI CTS tests
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// on Cuttlefish. The reference can be found here:
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// cts/tests/tests/secure_element/sample_applet/src/com/android/cts/omapi/test/CtsAndroidOmapiTestApplet.java
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class CtsAndroidOmapiTestApplet : public se::Applet {
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public:
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CtsAndroidOmapiTestApplet() {}
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virtual ~CtsAndroidOmapiTestApplet() {}
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se::RawApdu Select(se::Aid const& aid, uint8_t /*p2*/) override {
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if (aid[aid.size() - 1] == 0x31) {
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// AID: A000000476416E64726F696443545331
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return se::Apdu::CreateResponse(se::Status::SW_NO_ERROR);
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} else {
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// AID: A000000476416E64726F696443545332
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return se::Apdu::CreateResponse(GenerateBerTLVBytes(SELECT_RESPONSE_DATA_LENGTH),
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se::Status::SW_NO_ERROR);
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}
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}
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se::RawApdu ReadNextResponseChunk(uint16_t max_output_len) {
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uint16_t output_len = static_cast<uint16_t>(response_.size() - response_offset_);
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output_len = std::min<uint16_t>(max_output_len, output_len);
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std::vector<uint8_t> output{
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&response_[response_offset_],
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&response_[response_offset_ + output_len],
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};
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response_offset_ += output_len;
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uint16_t remaining_len = response_.size() - response_offset_;
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se::Status status = se::Status::SW_NO_ERROR;
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if (remaining_len > 0) {
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if (remaining_len > 256) {
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remaining_len = 0x00;
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}
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status = se::Status(se::Status::SW_BYTES_REMAINING_00 | remaining_len);
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} else {
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response_.clear();
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response_offset_ = 0;
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}
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return se::Apdu::CreateResponse(output, status);
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}
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se::RawApdu Process(se::Apdu const& apdu) override {
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uint16_t lc;
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uint16_t le = apdu.get_le();
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uint8_t p1 = apdu.get_p1();
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uint8_t p2 = apdu.get_p2();
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switch (apdu.get_ins()) {
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case NO_DATA_INS_1:
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case NO_DATA_INS_2:
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LOG(INFO) << __func__ << ": NO_DATA_INS_1|2";
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return se::Apdu::CreateResponse(se::Status::SW_NO_ERROR);
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case DATA_INS_1:
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case DATA_INS_2:
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// Return 256 bytes of data.
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LOG(INFO) << __func__ << ": DATA_INS_1|2";
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return se::Apdu::CreateResponse(GeneratesBytes(256), se::Status::SW_NO_ERROR);
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case GET_RESPONSE_INS:
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// ISO GET_RESPONSE command.
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LOG(INFO) << __func__ << ": GET_RESPONSE_INS";
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if (response_.empty()) {
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return se::Apdu::CreateResponse(se::Status::SW_CONDITIONS_NOT_SATISFIED);
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}
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return ReadNextResponseChunk(apdu.get_le());
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case SW_62xx_APDU_INS:
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LOG(INFO) << __func__ << ": SW_62xx_APDU_INS";
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if (p1 < 1 || p1 > 16) {
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return se::Apdu::CreateResponse(se::Status::SW_INCORRECT_P1P2);
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}
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if (p2 == SW_62xx_DATA_APDU_P2) {
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return se::Apdu::CreateResponse(GeneratesBytes(3),
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se::Status(SW_62xx_resp[p1 - 1]));
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}
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if (p2 == SW_62xx_VALIDATE_DATA_P2) {
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std::vector<uint8_t> output{SW_62xx_VALIDATE_DATA_RESP.begin(),
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SW_62xx_VALIDATE_DATA_RESP.end()};
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output[2] = p1;
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return se::Apdu::CreateResponse(std::move(output),
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se::Status(SW_62xx_resp[p1 - 1]));
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}
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return se::Apdu::CreateResponse(se::Status(SW_62xx_resp[p1 - 1]));
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case SEGMENTED_RESP_INS_1:
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case SEGMENTED_RESP_INS_2:
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LOG(INFO) << __func__ << ": SEGMENTED_RESP_INS_1|2";
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response_ = GeneratesBytes((static_cast<uint16_t>(p1) << 8) | p2);
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response_offset_ = 0;
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return ReadNextResponseChunk(std::min<uint16_t>(apdu.get_le(), 256));
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case SEGMENTED_RESP_INS_3:
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case SEGMENTED_RESP_INS_4:
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LOG(INFO) << __func__ << ": SEGMENTED_RESP_INS_3|4";
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response_ = GeneratesBytes((static_cast<uint16_t>(p1) << 8) | p2);
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response_offset_ = 0;
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return ReadNextResponseChunk(apdu.get_le());
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case SEGMENTED_RESP_INS_5:
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LOG(INFO) << __func__ << ": SEGMENTED_RESP_INS_5";
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if (le == 0xff) {
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return se::Apdu::CreateResponse(
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se::Status(se::Status::SW_CORRECT_LENGTH_00 | 0xff));
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}
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response_ = GeneratesBytes((static_cast<uint16_t>(p1) << 8) | p2);
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response_offset_ = 0;
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return ReadNextResponseChunk(apdu.get_le());
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case CHECK_SELECT_P2_APDU:
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LOG(INFO) << __func__ << ": CHECK_SELECT_P2_APDU";
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return se::Apdu::CreateResponse(std::vector<uint8_t>{apdu.get_p2()},
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se::Status::SW_NO_ERROR);
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default:
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// Case is not known.
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LOG(INFO) << __func__ << ": UNKNOWN_INS";
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return se::Apdu::CreateResponse(se::Status::SW_INS_NOT_SUPPORTED);
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}
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}
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private:
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std::vector<uint8_t> response_{};
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uint16_t response_offset_{0};
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static const uint8_t NO_DATA_INS_1 = 0x06;
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static const uint8_t NO_DATA_INS_2 = 0x0A;
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static const uint8_t DATA_INS_1 = 0x08;
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static const uint8_t DATA_INS_2 = 0x0C;
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static const uint8_t SW_62xx_APDU_INS = 0xF3;
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static const uint8_t SW_62xx_DATA_APDU_P2 = 0x08;
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static const uint8_t SW_62xx_VALIDATE_DATA_P2 = 0x0C;
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static constexpr std::array<uint8_t, 7> SW_62xx_VALIDATE_DATA_RESP = {0x01, 0xF3, 0x00, 0x0C,
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0x01, 0xAA, 0x00};
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static constexpr uint16_t SW_62xx_resp[] = {
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0x6200, 0x6281, 0x6282, 0x6283, 0x6285, 0x62F1, 0x62F2, 0x63F1,
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0x63F2, 0x63C2, 0x6202, 0x6280, 0x6284, 0x6286, 0x6300, 0x6381,
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};
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static const uint8_t SEGMENTED_RESP_INS_1 = 0xC2;
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static const uint8_t SEGMENTED_RESP_INS_2 = 0xC4;
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static const uint8_t SEGMENTED_RESP_INS_3 = 0xC6;
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static const uint8_t SEGMENTED_RESP_INS_4 = 0xC8;
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static const uint8_t SEGMENTED_RESP_INS_5 = 0xCF;
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static const uint8_t CHECK_SELECT_P2_APDU = 0xF4;
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static const uint8_t GET_RESPONSE_INS = 0xC0;
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static const uint8_t BER_TLV_TYPE = 0x1F;
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static const uint16_t SELECT_RESPONSE_DATA_LENGTH = 252;
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static const uint16_t LENGTH_256 = 0x0100;
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static constexpr std::array<uint8_t, 256> resp_bytes256{
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D,
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0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B,
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0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29,
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0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,
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0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53,
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0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 0x60, 0x61,
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0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D,
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0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B,
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0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
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0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
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0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5,
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0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3,
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0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1,
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0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
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0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED,
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0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB,
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0xFC, 0xFD, 0xFE, 0xFF};
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// Generate a response buffer of the selected length containing valid
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// BER TLV bytes.
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static std::vector<uint8_t> GenerateBerTLVBytes(uint16_t le) {
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// Support length from 0x00 - 0x7FFF.
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uint16_t le_len = 1;
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if (le < (uint16_t)0x80) {
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le_len = 1;
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} else if (le < (uint16_t)0x100) {
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le_len = 2;
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} else {
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le_len = 3;
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}
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uint16_t total_len = (uint16_t)(le + 2 + le_len);
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std::vector<uint8_t> output(total_len);
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uint16_t i = 0;
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output[i++] = BER_TLV_TYPE;
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output[i++] = 0x00; // second byte of Type
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if (le < 0x80) {
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output[i++] = le;
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} else if (le < 0x100) {
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output[i++] = 0x81;
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output[i++] = le;
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} else {
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output[i++] = 0x82;
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output[i++] = (le >> 8);
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output[i++] = (le & 0xFF);
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}
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while (i < total_len) {
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output[i++] = ((i - 2 - le_len) & 0xFF);
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}
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// Set the last byte to 0xFF for CTS validation.
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output[total_len - 1] = 0xFF;
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return output;
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}
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// Generate a response buffer of the selected length using the
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// array resp_bytes256 as input.
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static std::vector<uint8_t> GeneratesBytes(uint16_t total_len) {
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std::vector<uint8_t> output(total_len);
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uint16_t i = 0;
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while (i < total_len) {
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if ((total_len - i) >= resp_bytes256.size()) {
|
|
std::memcpy(&output[i], resp_bytes256.data(), resp_bytes256.size());
|
|
i += resp_bytes256.size();
|
|
} else {
|
|
output[i] = i & 0xFF;
|
|
i += 1;
|
|
}
|
|
}
|
|
|
|
// Set the last byte to 0xFF for CTS validation.
|
|
output[total_len - 1] = 0xFF;
|
|
return output;
|
|
}
|
|
};
|
|
|
|
class EmulatedSecureElement : public BnSecureElement {
|
|
public:
|
|
EmulatedSecureElement() {
|
|
std::shared_ptr<CtsAndroidOmapiTestApplet> test_applet =
|
|
std::make_shared<CtsAndroidOmapiTestApplet>();
|
|
|
|
applets_.push_back(std::pair{se::Aid{0xA0, 0x00, 0x00, 0x04, 0x76, 0x41, 0x6E, 0x64, 0x72,
|
|
0x6F, 0x69, 0x64, 0x43, 0x54, 0x53, 0x31},
|
|
test_applet});
|
|
|
|
applets_.push_back(std::pair{se::Aid{0xA0, 0x00, 0x00, 0x04, 0x76, 0x41, 0x6E, 0x64, 0x72,
|
|
0x6F, 0x69, 0x64, 0x43, 0x54, 0x53, 0x32},
|
|
test_applet});
|
|
}
|
|
|
|
ScopedAStatus init(const std::shared_ptr<ISecureElementCallback>& client_callback) override {
|
|
LOG(INFO) << __func__ << " callback: " << client_callback.get();
|
|
if (client_callback == nullptr) {
|
|
return ScopedAStatus::fromExceptionCode(EX_NULL_POINTER);
|
|
}
|
|
for (auto& channel : channels_) {
|
|
channel = Channel();
|
|
}
|
|
client_callback_ = client_callback;
|
|
client_callback_->onStateChange(true, "init");
|
|
return ScopedAStatus::ok();
|
|
}
|
|
|
|
ScopedAStatus getAtr(std::vector<uint8_t>* aidl_return) override {
|
|
LOG(INFO) << __func__;
|
|
if (client_callback_ == nullptr) {
|
|
return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
|
|
}
|
|
*aidl_return = atr_;
|
|
return ScopedAStatus::ok();
|
|
}
|
|
|
|
ScopedAStatus reset() override {
|
|
LOG(INFO) << __func__;
|
|
if (client_callback_ == nullptr) {
|
|
return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
|
|
}
|
|
client_callback_->onStateChange(false, "reset");
|
|
client_callback_->onStateChange(true, "reset");
|
|
// All channels are closed after reset.
|
|
for (auto& channel : channels_) {
|
|
channel = Channel();
|
|
}
|
|
return ScopedAStatus::ok();
|
|
}
|
|
|
|
ScopedAStatus isCardPresent(bool* aidl_return) override {
|
|
LOG(INFO) << __func__;
|
|
if (client_callback_ == nullptr) {
|
|
return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
|
|
}
|
|
*aidl_return = true;
|
|
return ScopedAStatus::ok();
|
|
}
|
|
|
|
ScopedAStatus openBasicChannel(const std::vector<uint8_t>& aid, int8_t p2,
|
|
std::vector<uint8_t>* aidl_return) override {
|
|
LOG(INFO) << __func__ << " aid: " << HexString(aid.data(), aid.size()) << " (" << aid.size()
|
|
<< ") p2 " << p2;
|
|
if (client_callback_ == nullptr) {
|
|
return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
|
|
}
|
|
|
|
std::vector<uint8_t> select_response;
|
|
std::shared_ptr<se::Applet> applet = nullptr;
|
|
|
|
// The basic channel can only be opened once, and stays opened
|
|
// and locked until the channel is closed.
|
|
if (channels_[0].opened) {
|
|
LOG(INFO) << __func__ << " basic channel already opened";
|
|
return ScopedAStatus::fromServiceSpecificError(CHANNEL_NOT_AVAILABLE);
|
|
}
|
|
|
|
// If the AID is defined (the AID is not Null and the length of the
|
|
// AID is not 0) and the channel is not locked then the corresponding
|
|
// applet shall be selected.
|
|
if (aid.size() > 0) {
|
|
applet = SelectApplet(aid);
|
|
if (applet == nullptr) {
|
|
// No applet registered with matching AID.
|
|
LOG(INFO) << __func__ << " basic channel AID not found";
|
|
return ScopedAStatus::fromServiceSpecificError(NO_SUCH_ELEMENT_ERROR);
|
|
}
|
|
select_response = applet->Select(aid, p2);
|
|
}
|
|
|
|
// If the AID is a 0 length AID and the channel is not locked, the
|
|
// method will select the Issuer Security Domain of the SE by sending a
|
|
// SELECT command with a 0 length AID as defined in
|
|
// [GP Card specification].
|
|
if (aid.size() == 0) {
|
|
select_response = kIssuerSecurityDomainSelectResponse;
|
|
}
|
|
|
|
LOG(INFO) << __func__ << " sending response: "
|
|
<< HexString(select_response.data(), select_response.size());
|
|
|
|
// TODO(b/123254068) - this is not an implementation of the OMAPI protocol
|
|
// or APDU. The functionality here is enough to exercise the framework,
|
|
// but actual calls to the secure element will fail. This implementation
|
|
// does not model channel isolation or any other aspects important to
|
|
// implementing secure element.
|
|
channels_[0] = Channel(aid, p2, applet);
|
|
*aidl_return = select_response;
|
|
return ScopedAStatus::ok();
|
|
}
|
|
|
|
ScopedAStatus openLogicalChannel(
|
|
const std::vector<uint8_t>& aid, int8_t p2,
|
|
::aidl::android::hardware::secure_element::LogicalChannelResponse* aidl_return)
|
|
override {
|
|
LOG(INFO) << __func__ << " aid: " << HexString(aid.data(), aid.size()) << " (" << aid.size()
|
|
<< ") p2 " << p2;
|
|
|
|
if (client_callback_ == nullptr) {
|
|
return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
|
|
}
|
|
|
|
size_t channel_number = 1;
|
|
std::vector<uint8_t> select_response;
|
|
std::shared_ptr<se::Applet> applet = nullptr;
|
|
|
|
// Look for an available channel number.
|
|
for (; channel_number < channels_.size(); channel_number++) {
|
|
if (channels_[channel_number].opened == false) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// All channels are currently allocated.
|
|
if (channel_number >= channels_.size()) {
|
|
LOG(INFO) << __func__ << " all logical channels already opened";
|
|
return ScopedAStatus::fromServiceSpecificError(CHANNEL_NOT_AVAILABLE);
|
|
}
|
|
|
|
// If the AID is defined (the AID is not Null and the length of the
|
|
// AID is not 0) then the corresponding applet shall be selected.
|
|
if (aid.size() > 0) {
|
|
applet = SelectApplet(aid);
|
|
if (applet == nullptr) {
|
|
// No applet registered with matching AID.
|
|
LOG(INFO) << __func__ << " logical channel AID not found";
|
|
return ScopedAStatus::fromServiceSpecificError(NO_SUCH_ELEMENT_ERROR);
|
|
}
|
|
select_response = applet->Select(aid, p2);
|
|
}
|
|
|
|
// If the length of the AID is 0, the method will select the
|
|
// Issuer Security Domain of the SE by sending a SELECT command
|
|
// with 0 length AID as defined in [GPCS].
|
|
if (aid.size() == 0) {
|
|
select_response = kIssuerSecurityDomainSelectResponse;
|
|
}
|
|
|
|
LOG(INFO) << __func__ << " sending response: "
|
|
<< HexString(select_response.data(), select_response.size());
|
|
|
|
// TODO(b/123254068) - this is not an implementation of the OMAPI protocol
|
|
// or APDU. The functionality here is enough to exercise the framework,
|
|
// but actual calls to the secure element will fail. This implementation
|
|
// does not model channel isolation or any other aspects important to
|
|
// implementing secure element.
|
|
channels_[channel_number] = Channel(aid, p2, applet);
|
|
*aidl_return = LogicalChannelResponse{
|
|
.channelNumber = static_cast<int8_t>(channel_number),
|
|
.selectResponse = select_response,
|
|
};
|
|
return ScopedAStatus::ok();
|
|
}
|
|
|
|
ScopedAStatus closeChannel(int8_t channel_number) override {
|
|
LOG(INFO) << __func__ << " channel number: " << static_cast<int>(channel_number);
|
|
if (client_callback_ == nullptr) {
|
|
return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
|
|
}
|
|
|
|
// The selected basic or logical channel is not opened.
|
|
if (channel_number >= channels_.size() || !channels_[channel_number].opened) {
|
|
return ScopedAStatus::fromServiceSpecificError(FAILED);
|
|
}
|
|
|
|
// TODO(b/123254068) - this is not an implementation of the OMAPI protocol
|
|
// or APDU. The functionality here is enough to exercise the framework,
|
|
// but actual calls to the secure element will fail. This implementation
|
|
// does not model channel isolation or any other aspects important to
|
|
// implementing secure element.
|
|
channels_[channel_number].opened = false;
|
|
return ScopedAStatus::ok();
|
|
}
|
|
|
|
ScopedAStatus transmit(const std::vector<uint8_t>& data,
|
|
std::vector<uint8_t>* aidl_return) override {
|
|
LOG(INFO) << __func__ << " data: " << HexString(data.data(), data.size()) << " ("
|
|
<< data.size() << ")";
|
|
if (client_callback_ == nullptr) {
|
|
return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
|
|
}
|
|
|
|
se::Apdu apdu(data);
|
|
uint8_t channel_number = apdu.get_channel_number();
|
|
std::vector<uint8_t> response_apdu;
|
|
|
|
switch (apdu.get_ins()) {
|
|
// TODO(b/123254068) - Implement support channel management APDUs.
|
|
case MANAGE_CHANNEL_INS:
|
|
// P1 = '00' to open
|
|
// P1 = '80' to close
|
|
LOG(INFO) << __func__ << " MANAGE_CHANNEL apdu";
|
|
response_apdu =
|
|
se::Apdu::CreateResponse(se::Status::SW_LOGICAL_CHANNEL_NOT_SUPPORTED);
|
|
break;
|
|
|
|
// TODO(b/123254068) - Implement support channel management APDUs.
|
|
case SELECT_INS:
|
|
LOG(INFO) << __func__ << " SELECT apdu";
|
|
response_apdu =
|
|
se::Apdu::CreateResponse(se::Status::SW_LOGICAL_CHANNEL_NOT_SUPPORTED);
|
|
break;
|
|
|
|
default:
|
|
CHECK(channel_number < channels_.size()) << " invalid channel number";
|
|
if (!channels_[channel_number].opened) {
|
|
LOG(INFO) << __func__ << " the channel " << static_cast<int>(channel_number)
|
|
<< " is not opened";
|
|
response_apdu =
|
|
se::Apdu::CreateResponse(se::Status::SW_LOGICAL_CHANNEL_NOT_SUPPORTED);
|
|
break;
|
|
}
|
|
// Send the APDU to the applet for processing.
|
|
// Applet implementation is optional, default to sending
|
|
// SW_INS_NOT_SUPPORTED.
|
|
if (channels_[channel_number].applet == nullptr) {
|
|
response_apdu = se::Apdu::CreateResponse(se::Status::SW_INS_NOT_SUPPORTED);
|
|
} else {
|
|
response_apdu = channels_[channel_number].applet->Process(apdu);
|
|
}
|
|
break;
|
|
}
|
|
|
|
aidl_return->assign(response_apdu.begin(), response_apdu.end());
|
|
LOG(INFO) << __func__
|
|
<< " response: " << HexString(aidl_return->data(), aidl_return->size()) << " ("
|
|
<< aidl_return->size() << ")";
|
|
return ScopedAStatus::ok();
|
|
}
|
|
|
|
private:
|
|
struct Channel {
|
|
public:
|
|
Channel() = default;
|
|
Channel(Channel const&) = default;
|
|
Channel(se::Aid const& aid, uint8_t p2, std::shared_ptr<se::Applet> applet)
|
|
: opened(true), aid(aid), p2(p2), applet(std::move(applet)) {}
|
|
Channel& operator=(Channel const&) = default;
|
|
|
|
bool opened{false};
|
|
se::Aid aid{};
|
|
uint8_t p2{0};
|
|
std::shared_ptr<se::Applet> applet{nullptr};
|
|
};
|
|
|
|
// OMAPI abstraction.
|
|
|
|
// Channel 0 is the basic channel, channels 1-19 are the logical channels.
|
|
std::array<Channel, 20> channels_{};
|
|
std::shared_ptr<ISecureElementCallback> client_callback_{nullptr};
|
|
|
|
// Secure element abstraction.
|
|
|
|
static const uint8_t MANAGE_CHANNEL_INS = 0x70;
|
|
static const uint8_t SELECT_INS = 0xa4;
|
|
|
|
// Secure element ATR (Answer-To-Reset).
|
|
// The format is specified by ISO/IEC 1816-4 2020 and lists
|
|
// the capabilities of the card.
|
|
//
|
|
// TODO(b/123254068): encode the default SE properties in the ATR:
|
|
// support for extended Lc / Le fields, maximum number of logical channels.
|
|
// The CTS tests are *not* checking this value.
|
|
std::vector<uint8_t> const atr_{};
|
|
|
|
// Applet registration.
|
|
std::vector<std::pair<se::Aid, std::shared_ptr<se::Applet>>> applets_{};
|
|
|
|
// Return the first applet that matches the selected aid.
|
|
std::shared_ptr<se::Applet> SelectApplet(se::Aid const& aid) {
|
|
for (auto& [applet_aid, applet] : applets_) {
|
|
if (applet_aid == aid) {
|
|
return applet;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
};
|
|
|
|
int main() {
|
|
ABinderProcess_setThreadPoolMaxThreadCount(0);
|
|
|
|
auto se = ndk::SharedRefBase::make<EmulatedSecureElement>();
|
|
const std::string name = std::string() + BnSecureElement::descriptor + "/eSE1";
|
|
binder_status_t status = AServiceManager_addService(se->asBinder().get(), name.c_str());
|
|
CHECK_EQ(status, STATUS_OK);
|
|
|
|
ABinderProcess_joinThreadPool();
|
|
return EXIT_FAILURE; // should not reach
|
|
}
|