hidl/fingerprint/BiometricsFingerprint.cpp - LeafOS-Devices/android_hardware_samsung - Gitiles

 /*
  * Copyright (C) 2019 The LineageOS 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.
  */
 #define LOG_TAG "android.hardware.biometrics.fingerprint@2.3-service.samsung"

 #include <android-base/logging.h>

 #include <hardware/hw_auth_token.h>

 #include <hardware/fingerprint.h>
 #include <hardware/hardware.h>
 #include "BiometricsFingerprint.h"

 #include <dlfcn.h>
 #include <fstream>
 #include <inttypes.h>
 #include <unistd.h>

 #ifdef HAS_FINGERPRINT_GESTURES
 #include <fcntl.h>
 #endif

 namespace android {
 namespace hardware {
 namespace biometrics {
 namespace fingerprint {
 namespace V2_3 {
 namespace implementation {

 using RequestStatus = android::hardware::biometrics::fingerprint::V2_1::RequestStatus;

 BiometricsFingerprint* BiometricsFingerprint::sInstance = nullptr;

 BiometricsFingerprint::BiometricsFingerprint() : mClientCallback(nullptr) {
     sInstance = this;  // keep track of the most recent instance
     if (!openHal()) {
         LOG(ERROR) << "Can't open HAL module";
     }

     std::ifstream in("/sys/devices/virtual/fingerprint/fingerprint/position");
     mIsUdfps = !!in;
     if (in)
         in.close();

 #ifdef HAS_FINGERPRINT_GESTURES
     request(FINGERPRINT_REQUEST_NAVIGATION_MODE_START, 1);

     uinputFd = open("/dev/uinput", O_WRONLY | O_NONBLOCK);
     if (uinputFd < 0) {
         LOG(ERROR) << "Unable to open uinput node";
         return;
     }

     int err = ioctl(uinputFd, UI_SET_EVBIT, EV_KEY) |
           ioctl(uinputFd, UI_SET_KEYBIT, KEY_UP) |
           ioctl(uinputFd, UI_SET_KEYBIT, KEY_DOWN);
     if (err != 0) {
         LOG(ERROR) << "Unable to enable key events";
         return;
     }

     struct uinput_user_dev uidev;
     sprintf(uidev.name, "uinput-sec-fp");
     uidev.id.bustype = BUS_VIRTUAL;

     err = write(uinputFd, &uidev, sizeof(uidev));
     if (err < 0) {
        LOG(ERROR) << "Write user device to uinput node failed";
        return;
     }

     err = ioctl(uinputFd, UI_DEV_CREATE);
     if (err < 0) {
        LOG(ERROR) << "Unable to create uinput device";
        return;
     }

     LOG(INFO) << "Successfully registered uinput-sec-fp for fingerprint gestures";
 #endif
 }

 BiometricsFingerprint::~BiometricsFingerprint() {
     if (ss_fingerprint_close() != 0) {
         LOG(ERROR) << "Can't close HAL module";
     }
 }

 Return<bool> BiometricsFingerprint::isUdfps(uint32_t) {
     return mIsUdfps;
 }

 Return<void> BiometricsFingerprint::onFingerDown(uint32_t, uint32_t, float, float) {
 #ifdef REQUEST_TOUCH_EVENT
     request(SEM_REQUEST_TOUCH_EVENT, 2);
 #endif
     return Void();
 }

 Return<void> BiometricsFingerprint::onFingerUp() {
 #ifdef REQUEST_TOUCH_EVENT
     request(SEM_REQUEST_TOUCH_EVENT, 1);
 #endif
     return Void();
 }

 Return<RequestStatus> BiometricsFingerprint::ErrorFilter(int32_t error) {
     switch (error) {
         case 0:
             return RequestStatus::SYS_OK;
         case -2:
             return RequestStatus::SYS_ENOENT;
         case -4:
             return RequestStatus::SYS_EINTR;
         case -5:
             return RequestStatus::SYS_EIO;
         case -11:
             return RequestStatus::SYS_EAGAIN;
         case -12:
             return RequestStatus::SYS_ENOMEM;
         case -13:
             return RequestStatus::SYS_EACCES;
         case -14:
             return RequestStatus::SYS_EFAULT;
         case -16:
             return RequestStatus::SYS_EBUSY;
         case -22:
             return RequestStatus::SYS_EINVAL;
         case -28:
             return RequestStatus::SYS_ENOSPC;
         case -110:
             return RequestStatus::SYS_ETIMEDOUT;
         default:
             LOG(ERROR) << "An unknown error returned from fingerprint vendor library: " << error;
             return RequestStatus::SYS_UNKNOWN;
     }
 }

 // Translate from errors returned by traditional HAL (see fingerprint.h) to
 // HIDL-compliant FingerprintError.
 FingerprintError BiometricsFingerprint::VendorErrorFilter(int32_t error, int32_t* vendorCode) {
     *vendorCode = 0;
     switch (error) {
         case FINGERPRINT_ERROR_HW_UNAVAILABLE:
             return FingerprintError::ERROR_HW_UNAVAILABLE;
         case FINGERPRINT_ERROR_UNABLE_TO_PROCESS:
             return FingerprintError::ERROR_UNABLE_TO_PROCESS;
         case FINGERPRINT_ERROR_TIMEOUT:
             return FingerprintError::ERROR_TIMEOUT;
         case FINGERPRINT_ERROR_NO_SPACE:
             return FingerprintError::ERROR_NO_SPACE;
         case FINGERPRINT_ERROR_CANCELED:
             return FingerprintError::ERROR_CANCELED;
         case FINGERPRINT_ERROR_UNABLE_TO_REMOVE:
             return FingerprintError::ERROR_UNABLE_TO_REMOVE;
         case FINGERPRINT_ERROR_LOCKOUT:
             return FingerprintError::ERROR_LOCKOUT;
         default:
             if (error >= FINGERPRINT_ERROR_VENDOR_BASE) {
                 // vendor specific code.
                 *vendorCode = error - FINGERPRINT_ERROR_VENDOR_BASE;
                 return FingerprintError::ERROR_VENDOR;
             }
     }
     LOG(ERROR) << "Unknown error from fingerprint vendor library: " << error;
     return FingerprintError::ERROR_UNABLE_TO_PROCESS;
 }

 // Translate acquired messages returned by traditional HAL (see fingerprint.h)
 // to HIDL-compliant FingerprintAcquiredInfo.
 FingerprintAcquiredInfo BiometricsFingerprint::VendorAcquiredFilter(int32_t info,
                                                                     int32_t* vendorCode) {
     *vendorCode = 0;
     switch (info) {
         case FINGERPRINT_ACQUIRED_GOOD:
             return FingerprintAcquiredInfo::ACQUIRED_GOOD;
         case FINGERPRINT_ACQUIRED_PARTIAL:
             return FingerprintAcquiredInfo::ACQUIRED_PARTIAL;
         case FINGERPRINT_ACQUIRED_INSUFFICIENT:
             return FingerprintAcquiredInfo::ACQUIRED_INSUFFICIENT;
         case FINGERPRINT_ACQUIRED_IMAGER_DIRTY:
             return FingerprintAcquiredInfo::ACQUIRED_IMAGER_DIRTY;
         case FINGERPRINT_ACQUIRED_TOO_SLOW:
             return FingerprintAcquiredInfo::ACQUIRED_TOO_SLOW;
         case FINGERPRINT_ACQUIRED_TOO_FAST:
             return FingerprintAcquiredInfo::ACQUIRED_TOO_FAST;
         default:
             if (info >= FINGERPRINT_ACQUIRED_VENDOR_BASE) {
                 // vendor specific code.
                 *vendorCode = info - FINGERPRINT_ACQUIRED_VENDOR_BASE;
                 return FingerprintAcquiredInfo::ACQUIRED_VENDOR;
             }
     }
     LOG(ERROR) << "Unknown acquiredmsg from fingerprint vendor library: " << info;
     return FingerprintAcquiredInfo::ACQUIRED_INSUFFICIENT;
 }

 Return<uint64_t> BiometricsFingerprint::setNotify(
     const sp<IBiometricsFingerprintClientCallback>& clientCallback) {
     std::lock_guard<std::mutex> lock(mClientCallbackMutex);
     mClientCallback = clientCallback;
     // This is here because HAL 2.3 doesn't have a way to propagate a
     // unique token for its driver. Subsequent versions should send a unique
     // token for each call to setNotify(). This is fine as long as there's only
     // one fingerprint device on the platform.
     return reinterpret_cast<uint64_t>(this);
 }

 Return<uint64_t> BiometricsFingerprint::preEnroll() {
     return ss_fingerprint_pre_enroll();
 }

 Return<RequestStatus> BiometricsFingerprint::enroll(const hidl_array<uint8_t, 69>& hat,
                                                     uint32_t gid, uint32_t timeoutSec) {
     const hw_auth_token_t* authToken = reinterpret_cast<const hw_auth_token_t*>(hat.data());

 #ifdef REQUEST_FORCE_CALIBRATE
     request(SEM_REQUEST_FORCE_CBGE, 1);
 #endif

     return ErrorFilter(ss_fingerprint_enroll(authToken, gid, timeoutSec));
 }

 Return<RequestStatus> BiometricsFingerprint::postEnroll() {
     return ErrorFilter(ss_fingerprint_post_enroll());
 }

 Return<uint64_t> BiometricsFingerprint::getAuthenticatorId() {
     return ss_fingerprint_get_auth_id();
 }

 Return<RequestStatus> BiometricsFingerprint::cancel() {
     int32_t ret = ss_fingerprint_cancel();

 #ifdef CALL_NOTIFY_ON_CANCEL
     if (ret == 0) {
         fingerprint_msg_t msg{};
         msg.type = FINGERPRINT_ERROR;
         msg.data.error = FINGERPRINT_ERROR_CANCELED;
         notify(&msg);
     }
 #endif

     return ErrorFilter(ret);
 }

 Return<RequestStatus> BiometricsFingerprint::enumerate() {
     if (ss_fingerprint_enumerate != nullptr) {
         return ErrorFilter(ss_fingerprint_enumerate());
     }

     return RequestStatus::SYS_UNKNOWN;
 }

 Return<RequestStatus> BiometricsFingerprint::remove(uint32_t gid, uint32_t fid) {
     return ErrorFilter(ss_fingerprint_remove(gid, fid));
 }

 Return<RequestStatus> BiometricsFingerprint::setActiveGroup(uint32_t gid,
                                                             const hidl_string& storePath) {
     if (storePath.size() >= PATH_MAX || storePath.size() <= 0) {
         LOG(ERROR) << "Bad path length: " << storePath.size();
         return RequestStatus::SYS_EINVAL;
     }

     if (access(storePath.c_str(), W_OK)) {
         return RequestStatus::SYS_EINVAL;
     }

     return ErrorFilter(ss_fingerprint_set_active_group(gid, storePath.c_str()));
 }

 Return<RequestStatus> BiometricsFingerprint::authenticate(uint64_t operationId, uint32_t gid) {
     return ErrorFilter(ss_fingerprint_authenticate(operationId, gid));
 }

 IBiometricsFingerprint* BiometricsFingerprint::getInstance() {
     if (!sInstance) {
         sInstance = new BiometricsFingerprint();
     }
     return sInstance;
 }

 bool BiometricsFingerprint::openHal() {
     void* handle = dlopen("libbauthserver.so", RTLD_NOW);
     if (handle) {
         int err;

         ss_fingerprint_close =
             reinterpret_cast<typeof(ss_fingerprint_close)>(dlsym(handle, "ss_fingerprint_close"));
         ss_fingerprint_open =
             reinterpret_cast<typeof(ss_fingerprint_open)>(dlsym(handle, "ss_fingerprint_open"));

         ss_set_notify_callback = reinterpret_cast<typeof(ss_set_notify_callback)>(
             dlsym(handle, "ss_set_notify_callback"));
         ss_fingerprint_pre_enroll = reinterpret_cast<typeof(ss_fingerprint_pre_enroll)>(
             dlsym(handle, "ss_fingerprint_pre_enroll"));
         ss_fingerprint_enroll =
             reinterpret_cast<typeof(ss_fingerprint_enroll)>(dlsym(handle, "ss_fingerprint_enroll"));
         ss_fingerprint_post_enroll = reinterpret_cast<typeof(ss_fingerprint_post_enroll)>(
             dlsym(handle, "ss_fingerprint_post_enroll"));
         ss_fingerprint_get_auth_id = reinterpret_cast<typeof(ss_fingerprint_get_auth_id)>(
             dlsym(handle, "ss_fingerprint_get_auth_id"));
         ss_fingerprint_cancel =
             reinterpret_cast<typeof(ss_fingerprint_cancel)>(dlsym(handle, "ss_fingerprint_cancel"));
         ss_fingerprint_enumerate = reinterpret_cast<typeof(ss_fingerprint_enumerate)>(
             dlsym(handle, "ss_fingerprint_enumerate"));
         ss_fingerprint_remove =
             reinterpret_cast<typeof(ss_fingerprint_remove)>(dlsym(handle, "ss_fingerprint_remove"));
         ss_fingerprint_set_active_group = reinterpret_cast<typeof(ss_fingerprint_set_active_group)>(
             dlsym(handle, "ss_fingerprint_set_active_group"));
         ss_fingerprint_authenticate = reinterpret_cast<typeof(ss_fingerprint_authenticate)>(
             dlsym(handle, "ss_fingerprint_authenticate"));
         ss_fingerprint_request = reinterpret_cast<typeof(ss_fingerprint_request)>(
             dlsym(handle, "ss_fingerprint_request"));

         if ((err = ss_fingerprint_open(nullptr)) != 0) {
             LOG(ERROR) << "Can't open fingerprint, error: " << err;
             return false;
         }

         if ((err = ss_set_notify_callback(BiometricsFingerprint::notify)) != 0) {
             LOG(ERROR) << "Can't register fingerprint module callback, error: " << err;
             return false;
         }

         return true;
     }

     return false;
 }

 void BiometricsFingerprint::notify(const fingerprint_msg_t* msg) {
     BiometricsFingerprint* thisPtr =
         static_cast<BiometricsFingerprint*>(BiometricsFingerprint::getInstance());
     std::lock_guard<std::mutex> lock(thisPtr->mClientCallbackMutex);
     if (thisPtr == nullptr || thisPtr->mClientCallback == nullptr) {
         LOG(ERROR) << "Receiving callbacks before the client callback is registered.";
         return;
     }
     const uint64_t devId = 1;
     switch (msg->type) {
         case FINGERPRINT_ERROR: {
             int32_t vendorCode = 0;
             FingerprintError result = VendorErrorFilter(msg->data.error, &vendorCode);
             LOG(DEBUG) << "onError(" << static_cast<int>(result) << ")";
             if (!thisPtr->mClientCallback->onError(devId, result, vendorCode).isOk()) {
                 LOG(ERROR) << "failed to invoke fingerprint onError callback";
             }
         } break;
         case FINGERPRINT_ACQUIRED: {
             if (msg->data.acquired.acquired_info > SEM_FINGERPRINT_EVENT_BASE) {
                 thisPtr->handleEvent(msg->data.acquired.acquired_info);
                 return;
             }
             int32_t vendorCode = 0;
             FingerprintAcquiredInfo result =
                 VendorAcquiredFilter(msg->data.acquired.acquired_info, &vendorCode);
             LOG(DEBUG) << "onAcquired(" << static_cast<int>(result) << ")";
             if (!thisPtr->mClientCallback->onAcquired(devId, result, vendorCode).isOk()) {
                 LOG(ERROR) << "failed to invoke fingerprint onAcquired callback";
             }
         } break;
         case FINGERPRINT_TEMPLATE_ENROLLING:
 #ifdef USES_PERCENTAGE_SAMPLES
             const_cast<fingerprint_msg_t*>(msg)->data.enroll.samples_remaining =
                 100 - msg->data.enroll.samples_remaining;
 #endif
 #ifdef CALL_CANCEL_ON_ENROLL_COMPLETION
             if(msg->data.enroll.samples_remaining == 0) {
                 thisPtr->ss_fingerprint_cancel();
             }
 #endif
             LOG(DEBUG) << "onEnrollResult(fid=" << msg->data.enroll.finger.fid
                        << ", gid=" << msg->data.enroll.finger.gid
                        << ", rem=" << msg->data.enroll.samples_remaining << ")";
             if (!thisPtr->mClientCallback
                     ->onEnrollResult(devId, msg->data.enroll.finger.fid,
                                      msg->data.enroll.finger.gid, msg->data.enroll.samples_remaining)
                     .isOk()) {
                 LOG(ERROR) << "failed to invoke fingerprint onEnrollResult callback";
             }
             break;
         case FINGERPRINT_TEMPLATE_REMOVED:
             LOG(DEBUG) << "onRemove(fid=" << msg->data.removed.finger.fid
                        << ", gid=" << msg->data.removed.finger.gid
                        << ", rem=" << msg->data.removed.remaining_templates << ")";
             if (!thisPtr->mClientCallback
                      ->onRemoved(devId, msg->data.removed.finger.fid, msg->data.removed.finger.gid,
                                  msg->data.removed.remaining_templates)
                      .isOk()) {
                 LOG(ERROR) << "failed to invoke fingerprint onRemoved callback";
             }
             break;
         case FINGERPRINT_AUTHENTICATED:
             LOG(DEBUG) << "onAuthenticated(fid=" << msg->data.authenticated.finger.fid
                        << ", gid=" << msg->data.authenticated.finger.gid << ")";
             if (msg->data.authenticated.finger.fid != 0) {
                 const uint8_t* hat = reinterpret_cast<const uint8_t*>(&msg->data.authenticated.hat);
                 const hidl_vec<uint8_t> token(
                     std::vector<uint8_t>(hat, hat + sizeof(msg->data.authenticated.hat)));
                 if (!thisPtr->mClientCallback
                          ->onAuthenticated(devId, msg->data.authenticated.finger.fid,
                                            msg->data.authenticated.finger.gid, token)
                          .isOk()) {
                     LOG(ERROR) << "failed to invoke fingerprint onAuthenticated callback";
                 }
             } else {
                 // Not a recognized fingerprint
                 if (!thisPtr->mClientCallback
                          ->onAuthenticated(devId, msg->data.authenticated.finger.fid,
                                            msg->data.authenticated.finger.gid, hidl_vec<uint8_t>())
                          .isOk()) {
                     LOG(ERROR) << "failed to invoke fingerprint onAuthenticated callback";
                 }
             }
             break;
         case FINGERPRINT_TEMPLATE_ENUMERATING:
             LOG(DEBUG) << "onEnumerate(fid=" << msg->data.enumerated.finger.fid
                        << ", gid=" << msg->data.enumerated.finger.gid
                        << ", rem=" << msg->data.enumerated.remaining_templates << ")";
             if (!thisPtr->mClientCallback
                      ->onEnumerate(devId, msg->data.enumerated.finger.fid,
                                    msg->data.enumerated.finger.gid,
                                    msg->data.enumerated.remaining_templates)
                      .isOk()) {
                 LOG(ERROR) << "failed to invoke fingerprint onEnumerate callback";
             }
             break;
     }
 }

 void BiometricsFingerprint::handleEvent(int eventCode) {
     switch (eventCode) {
 #ifdef HAS_FINGERPRINT_GESTURES
         case SEM_FINGERPRINT_EVENT_GESTURE_SWIPE_DOWN:
         case SEM_FINGERPRINT_EVENT_GESTURE_SWIPE_UP:
             struct input_event event {};
             int keycode = eventCode == SEM_FINGERPRINT_EVENT_GESTURE_SWIPE_UP ?
                           KEY_UP : KEY_DOWN;

             // Report the key
             event.type = EV_KEY;
             event.code = keycode;
             event.value = 1;
             if (write(uinputFd, &event, sizeof(event)) < 0) {
                 LOG(ERROR) << "Write EV_KEY to uinput node failed";
                 return;
             }

             // Force a flush with an EV_SYN
             event.type = EV_SYN;
             event.code = SYN_REPORT;
             event.value = 0;
             if (write(uinputFd, &event, sizeof(event)) < 0) {
                 LOG(ERROR) << "Write EV_SYN to uinput node failed";
                 return;
             }

             // Report the key
             event.type = EV_KEY;
             event.code = keycode;
             event.value = 0;
             if (write(uinputFd, &event, sizeof(event)) < 0) {
                 LOG(ERROR) << "Write EV_KEY to uinput node failed";
                 return;
             }

             // Force a flush with an EV_SYN
             event.type = EV_SYN;
             event.code = SYN_REPORT;
             event.value = 0;
             if (write(uinputFd, &event, sizeof(event)) < 0) {
                 LOG(ERROR) << "Write EV_SYN to uinput node failed";
                 return;
             }
         break;
 #endif
     }
 }

 int BiometricsFingerprint::request(int cmd, int param) {
     // TO-DO: input, output handling not implemented
     int result = ss_fingerprint_request(cmd, nullptr, 0, nullptr, 0, param);
     LOG(INFO) << "request(cmd=" << cmd << ", param=" << param << ", result=" << result << ")";
     return result;
 }

 int BiometricsFingerprint::waitForSensor(std::chrono::milliseconds pollWait,
                                          std::chrono::milliseconds timeOut) {
     int sensorStatus = SEM_SENSOR_STATUS_WORKING;
     std::chrono::milliseconds timeWaited = 0ms;
     while (sensorStatus != SEM_SENSOR_STATUS_OK) {
         if (sensorStatus == SEM_SENSOR_STATUS_CALIBRATION_ERROR
                 || sensorStatus == SEM_SENSOR_STATUS_ERROR){
             return -1;
         }
         if (timeWaited >= timeOut) {
             return -2;
         }
         sensorStatus = request(FINGERPRINT_REQUEST_GET_SENSOR_STATUS, 0);
         std::this_thread::sleep_for(pollWait);
         timeWaited += pollWait;
     }
     return 0;
 }

 }  // namespace implementation
 }  // namespace V2_3
 }  // namespace fingerprint
 }  // namespace biometrics
 }  // namespace hardware
 }  // namespace android
	/*
	* Copyright (C) 2019 The LineageOS 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.
	*/
	#define LOG_TAG "android.hardware.biometrics.fingerprint@2.3-service.samsung"

	#include <android-base/logging.h>

	#include <hardware/hw_auth_token.h>

	#include <hardware/fingerprint.h>
	#include <hardware/hardware.h>
	#include "BiometricsFingerprint.h"

	#include <dlfcn.h>
	#include <fstream>
	#include <inttypes.h>
	#include <unistd.h>

	#ifdef HAS_FINGERPRINT_GESTURES
	#include <fcntl.h>
	#endif

	namespace android {
	namespace hardware {
	namespace biometrics {
	namespace fingerprint {
	namespace V2_3 {
	namespace implementation {

	using RequestStatus = android::hardware::biometrics::fingerprint::V2_1::RequestStatus;

	BiometricsFingerprint* BiometricsFingerprint::sInstance = nullptr;

	BiometricsFingerprint::BiometricsFingerprint() : mClientCallback(nullptr) {
	sInstance = this; // keep track of the most recent instance
	if (!openHal()) {
	LOG(ERROR) << "Can't open HAL module";
	}

	std::ifstream in("/sys/devices/virtual/fingerprint/fingerprint/position");
	mIsUdfps = !!in;
	if (in)
	in.close();

	#ifdef HAS_FINGERPRINT_GESTURES
	request(FINGERPRINT_REQUEST_NAVIGATION_MODE_START, 1);

	uinputFd = open("/dev/uinput", O_WRONLY \| O_NONBLOCK);
	if (uinputFd < 0) {
	LOG(ERROR) << "Unable to open uinput node";
	return;
	}

	int err = ioctl(uinputFd, UI_SET_EVBIT, EV_KEY) \|
	ioctl(uinputFd, UI_SET_KEYBIT, KEY_UP) \|
	ioctl(uinputFd, UI_SET_KEYBIT, KEY_DOWN);
	if (err != 0) {
	LOG(ERROR) << "Unable to enable key events";
	return;
	}

	struct uinput_user_dev uidev;
	sprintf(uidev.name, "uinput-sec-fp");
	uidev.id.bustype = BUS_VIRTUAL;

	err = write(uinputFd, &uidev, sizeof(uidev));
	if (err < 0) {
	LOG(ERROR) << "Write user device to uinput node failed";
	return;
	}

	err = ioctl(uinputFd, UI_DEV_CREATE);
	if (err < 0) {
	LOG(ERROR) << "Unable to create uinput device";
	return;
	}

	LOG(INFO) << "Successfully registered uinput-sec-fp for fingerprint gestures";
	#endif
	}

	BiometricsFingerprint::~BiometricsFingerprint() {
	if (ss_fingerprint_close() != 0) {
	LOG(ERROR) << "Can't close HAL module";
	}
	}

	Return<bool> BiometricsFingerprint::isUdfps(uint32_t) {
	return mIsUdfps;
	}

	Return<void> BiometricsFingerprint::onFingerDown(uint32_t, uint32_t, float, float) {
	#ifdef REQUEST_TOUCH_EVENT
	request(SEM_REQUEST_TOUCH_EVENT, 2);
	#endif
	return Void();
	}

	Return<void> BiometricsFingerprint::onFingerUp() {
	#ifdef REQUEST_TOUCH_EVENT
	request(SEM_REQUEST_TOUCH_EVENT, 1);
	#endif
	return Void();
	}

	Return<RequestStatus> BiometricsFingerprint::ErrorFilter(int32_t error) {
	switch (error) {
	case 0:
	return RequestStatus::SYS_OK;
	case -2:
	return RequestStatus::SYS_ENOENT;
	case -4:
	return RequestStatus::SYS_EINTR;
	case -5:
	return RequestStatus::SYS_EIO;
	case -11:
	return RequestStatus::SYS_EAGAIN;
	case -12:
	return RequestStatus::SYS_ENOMEM;
	case -13:
	return RequestStatus::SYS_EACCES;
	case -14:
	return RequestStatus::SYS_EFAULT;
	case -16:
	return RequestStatus::SYS_EBUSY;
	case -22:
	return RequestStatus::SYS_EINVAL;
	case -28:
	return RequestStatus::SYS_ENOSPC;
	case -110:
	return RequestStatus::SYS_ETIMEDOUT;
	default:
	LOG(ERROR) << "An unknown error returned from fingerprint vendor library: " << error;
	return RequestStatus::SYS_UNKNOWN;
	}
	}

	// Translate from errors returned by traditional HAL (see fingerprint.h) to
	// HIDL-compliant FingerprintError.
	FingerprintError BiometricsFingerprint::VendorErrorFilter(int32_t error, int32_t* vendorCode) {
	*vendorCode = 0;
	switch (error) {
	case FINGERPRINT_ERROR_HW_UNAVAILABLE:
	return FingerprintError::ERROR_HW_UNAVAILABLE;
	case FINGERPRINT_ERROR_UNABLE_TO_PROCESS:
	return FingerprintError::ERROR_UNABLE_TO_PROCESS;
	case FINGERPRINT_ERROR_TIMEOUT:
	return FingerprintError::ERROR_TIMEOUT;
	case FINGERPRINT_ERROR_NO_SPACE:
	return FingerprintError::ERROR_NO_SPACE;
	case FINGERPRINT_ERROR_CANCELED:
	return FingerprintError::ERROR_CANCELED;
	case FINGERPRINT_ERROR_UNABLE_TO_REMOVE:
	return FingerprintError::ERROR_UNABLE_TO_REMOVE;
	case FINGERPRINT_ERROR_LOCKOUT:
	return FingerprintError::ERROR_LOCKOUT;
	default:
	if (error >= FINGERPRINT_ERROR_VENDOR_BASE) {
	// vendor specific code.
	*vendorCode = error - FINGERPRINT_ERROR_VENDOR_BASE;
	return FingerprintError::ERROR_VENDOR;
	}
	}
	LOG(ERROR) << "Unknown error from fingerprint vendor library: " << error;
	return FingerprintError::ERROR_UNABLE_TO_PROCESS;
	}

	// Translate acquired messages returned by traditional HAL (see fingerprint.h)
	// to HIDL-compliant FingerprintAcquiredInfo.
	FingerprintAcquiredInfo BiometricsFingerprint::VendorAcquiredFilter(int32_t info,
	int32_t* vendorCode) {
	*vendorCode = 0;
	switch (info) {
	case FINGERPRINT_ACQUIRED_GOOD:
	return FingerprintAcquiredInfo::ACQUIRED_GOOD;
	case FINGERPRINT_ACQUIRED_PARTIAL:
	return FingerprintAcquiredInfo::ACQUIRED_PARTIAL;
	case FINGERPRINT_ACQUIRED_INSUFFICIENT:
	return FingerprintAcquiredInfo::ACQUIRED_INSUFFICIENT;
	case FINGERPRINT_ACQUIRED_IMAGER_DIRTY:
	return FingerprintAcquiredInfo::ACQUIRED_IMAGER_DIRTY;
	case FINGERPRINT_ACQUIRED_TOO_SLOW:
	return FingerprintAcquiredInfo::ACQUIRED_TOO_SLOW;
	case FINGERPRINT_ACQUIRED_TOO_FAST:
	return FingerprintAcquiredInfo::ACQUIRED_TOO_FAST;
	default:
	if (info >= FINGERPRINT_ACQUIRED_VENDOR_BASE) {
	// vendor specific code.
	*vendorCode = info - FINGERPRINT_ACQUIRED_VENDOR_BASE;
	return FingerprintAcquiredInfo::ACQUIRED_VENDOR;
	}
	}
	LOG(ERROR) << "Unknown acquiredmsg from fingerprint vendor library: " << info;
	return FingerprintAcquiredInfo::ACQUIRED_INSUFFICIENT;
	}

	Return<uint64_t> BiometricsFingerprint::setNotify(
	const sp<IBiometricsFingerprintClientCallback>& clientCallback) {
	std::lock_guard<std::mutex> lock(mClientCallbackMutex);
	mClientCallback = clientCallback;
	// This is here because HAL 2.3 doesn't have a way to propagate a
	// unique token for its driver. Subsequent versions should send a unique
	// token for each call to setNotify(). This is fine as long as there's only
	// one fingerprint device on the platform.
	return reinterpret_cast<uint64_t>(this);
	}

	Return<uint64_t> BiometricsFingerprint::preEnroll() {
	return ss_fingerprint_pre_enroll();
	}

	Return<RequestStatus> BiometricsFingerprint::enroll(const hidl_array<uint8_t, 69>& hat,
	uint32_t gid, uint32_t timeoutSec) {
	const hw_auth_token_t* authToken = reinterpret_cast<const hw_auth_token_t*>(hat.data());

	#ifdef REQUEST_FORCE_CALIBRATE
	request(SEM_REQUEST_FORCE_CBGE, 1);
	#endif

	return ErrorFilter(ss_fingerprint_enroll(authToken, gid, timeoutSec));
	}

	Return<RequestStatus> BiometricsFingerprint::postEnroll() {
	return ErrorFilter(ss_fingerprint_post_enroll());
	}

	Return<uint64_t> BiometricsFingerprint::getAuthenticatorId() {
	return ss_fingerprint_get_auth_id();
	}

	Return<RequestStatus> BiometricsFingerprint::cancel() {
	int32_t ret = ss_fingerprint_cancel();

	#ifdef CALL_NOTIFY_ON_CANCEL
	if (ret == 0) {
	fingerprint_msg_t msg{};
	msg.type = FINGERPRINT_ERROR;
	msg.data.error = FINGERPRINT_ERROR_CANCELED;
	notify(&msg);
	}
	#endif

	return ErrorFilter(ret);
	}

	Return<RequestStatus> BiometricsFingerprint::enumerate() {
	if (ss_fingerprint_enumerate != nullptr) {
	return ErrorFilter(ss_fingerprint_enumerate());
	}

	return RequestStatus::SYS_UNKNOWN;
	}

	Return<RequestStatus> BiometricsFingerprint::remove(uint32_t gid, uint32_t fid) {
	return ErrorFilter(ss_fingerprint_remove(gid, fid));
	}

	Return<RequestStatus> BiometricsFingerprint::setActiveGroup(uint32_t gid,
	const hidl_string& storePath) {
	if (storePath.size() >= PATH_MAX \|\| storePath.size() <= 0) {
	LOG(ERROR) << "Bad path length: " << storePath.size();
	return RequestStatus::SYS_EINVAL;
	}

	if (access(storePath.c_str(), W_OK)) {
	return RequestStatus::SYS_EINVAL;
	}

	return ErrorFilter(ss_fingerprint_set_active_group(gid, storePath.c_str()));
	}

	Return<RequestStatus> BiometricsFingerprint::authenticate(uint64_t operationId, uint32_t gid) {
	return ErrorFilter(ss_fingerprint_authenticate(operationId, gid));
	}

	IBiometricsFingerprint* BiometricsFingerprint::getInstance() {
	if (!sInstance) {
	sInstance = new BiometricsFingerprint();
	}
	return sInstance;
	}

	bool BiometricsFingerprint::openHal() {
	void* handle = dlopen("libbauthserver.so", RTLD_NOW);
	if (handle) {
	int err;

	ss_fingerprint_close =
	reinterpret_cast<typeof(ss_fingerprint_close)>(dlsym(handle, "ss_fingerprint_close"));
	ss_fingerprint_open =
	reinterpret_cast<typeof(ss_fingerprint_open)>(dlsym(handle, "ss_fingerprint_open"));

	ss_set_notify_callback = reinterpret_cast<typeof(ss_set_notify_callback)>(
	dlsym(handle, "ss_set_notify_callback"));
	ss_fingerprint_pre_enroll = reinterpret_cast<typeof(ss_fingerprint_pre_enroll)>(
	dlsym(handle, "ss_fingerprint_pre_enroll"));
	ss_fingerprint_enroll =
	reinterpret_cast<typeof(ss_fingerprint_enroll)>(dlsym(handle, "ss_fingerprint_enroll"));
	ss_fingerprint_post_enroll = reinterpret_cast<typeof(ss_fingerprint_post_enroll)>(
	dlsym(handle, "ss_fingerprint_post_enroll"));
	ss_fingerprint_get_auth_id = reinterpret_cast<typeof(ss_fingerprint_get_auth_id)>(
	dlsym(handle, "ss_fingerprint_get_auth_id"));
	ss_fingerprint_cancel =
	reinterpret_cast<typeof(ss_fingerprint_cancel)>(dlsym(handle, "ss_fingerprint_cancel"));
	ss_fingerprint_enumerate = reinterpret_cast<typeof(ss_fingerprint_enumerate)>(
	dlsym(handle, "ss_fingerprint_enumerate"));
	ss_fingerprint_remove =
	reinterpret_cast<typeof(ss_fingerprint_remove)>(dlsym(handle, "ss_fingerprint_remove"));
	ss_fingerprint_set_active_group = reinterpret_cast<typeof(ss_fingerprint_set_active_group)>(
	dlsym(handle, "ss_fingerprint_set_active_group"));
	ss_fingerprint_authenticate = reinterpret_cast<typeof(ss_fingerprint_authenticate)>(
	dlsym(handle, "ss_fingerprint_authenticate"));
	ss_fingerprint_request = reinterpret_cast<typeof(ss_fingerprint_request)>(
	dlsym(handle, "ss_fingerprint_request"));

	if ((err = ss_fingerprint_open(nullptr)) != 0) {
	LOG(ERROR) << "Can't open fingerprint, error: " << err;
	return false;
	}

	if ((err = ss_set_notify_callback(BiometricsFingerprint::notify)) != 0) {
	LOG(ERROR) << "Can't register fingerprint module callback, error: " << err;
	return false;
	}

	return true;
	}

	return false;
	}

	void BiometricsFingerprint::notify(const fingerprint_msg_t* msg) {
	BiometricsFingerprint* thisPtr =
	static_cast<BiometricsFingerprint*>(BiometricsFingerprint::getInstance());
	std::lock_guard<std::mutex> lock(thisPtr->mClientCallbackMutex);
	if (thisPtr == nullptr \|\| thisPtr->mClientCallback == nullptr) {
	LOG(ERROR) << "Receiving callbacks before the client callback is registered.";
	return;
	}
	const uint64_t devId = 1;
	switch (msg->type) {
	case FINGERPRINT_ERROR: {
	int32_t vendorCode = 0;
	FingerprintError result = VendorErrorFilter(msg->data.error, &vendorCode);
	LOG(DEBUG) << "onError(" << static_cast<int>(result) << ")";
	if (!thisPtr->mClientCallback->onError(devId, result, vendorCode).isOk()) {
	LOG(ERROR) << "failed to invoke fingerprint onError callback";
	}
	} break;
	case FINGERPRINT_ACQUIRED: {
	if (msg->data.acquired.acquired_info > SEM_FINGERPRINT_EVENT_BASE) {
	thisPtr->handleEvent(msg->data.acquired.acquired_info);
	return;
	}
	int32_t vendorCode = 0;
	FingerprintAcquiredInfo result =
	VendorAcquiredFilter(msg->data.acquired.acquired_info, &vendorCode);
	LOG(DEBUG) << "onAcquired(" << static_cast<int>(result) << ")";
	if (!thisPtr->mClientCallback->onAcquired(devId, result, vendorCode).isOk()) {
	LOG(ERROR) << "failed to invoke fingerprint onAcquired callback";
	}
	} break;
	case FINGERPRINT_TEMPLATE_ENROLLING:
	#ifdef USES_PERCENTAGE_SAMPLES
	const_cast<fingerprint_msg_t*>(msg)->data.enroll.samples_remaining =
	100 - msg->data.enroll.samples_remaining;
	#endif
	#ifdef CALL_CANCEL_ON_ENROLL_COMPLETION
	if(msg->data.enroll.samples_remaining == 0) {
	thisPtr->ss_fingerprint_cancel();
	}
	#endif
	LOG(DEBUG) << "onEnrollResult(fid=" << msg->data.enroll.finger.fid
	<< ", gid=" << msg->data.enroll.finger.gid
	<< ", rem=" << msg->data.enroll.samples_remaining << ")";
	if (!thisPtr->mClientCallback
	->onEnrollResult(devId, msg->data.enroll.finger.fid,
	msg->data.enroll.finger.gid, msg->data.enroll.samples_remaining)
	.isOk()) {
	LOG(ERROR) << "failed to invoke fingerprint onEnrollResult callback";
	}
	break;
	case FINGERPRINT_TEMPLATE_REMOVED:
	LOG(DEBUG) << "onRemove(fid=" << msg->data.removed.finger.fid
	<< ", gid=" << msg->data.removed.finger.gid
	<< ", rem=" << msg->data.removed.remaining_templates << ")";
	if (!thisPtr->mClientCallback
	->onRemoved(devId, msg->data.removed.finger.fid, msg->data.removed.finger.gid,
	msg->data.removed.remaining_templates)
	.isOk()) {
	LOG(ERROR) << "failed to invoke fingerprint onRemoved callback";
	}
	break;
	case FINGERPRINT_AUTHENTICATED:
	LOG(DEBUG) << "onAuthenticated(fid=" << msg->data.authenticated.finger.fid
	<< ", gid=" << msg->data.authenticated.finger.gid << ")";
	if (msg->data.authenticated.finger.fid != 0) {
	const uint8_t* hat = reinterpret_cast<const uint8_t*>(&msg->data.authenticated.hat);
	const hidl_vec<uint8_t> token(
	std::vector<uint8_t>(hat, hat + sizeof(msg->data.authenticated.hat)));
	if (!thisPtr->mClientCallback
	->onAuthenticated(devId, msg->data.authenticated.finger.fid,
	msg->data.authenticated.finger.gid, token)
	.isOk()) {
	LOG(ERROR) << "failed to invoke fingerprint onAuthenticated callback";
	}
	} else {
	// Not a recognized fingerprint
	if (!thisPtr->mClientCallback
	->onAuthenticated(devId, msg->data.authenticated.finger.fid,
	msg->data.authenticated.finger.gid, hidl_vec<uint8_t>())
	.isOk()) {
	LOG(ERROR) << "failed to invoke fingerprint onAuthenticated callback";
	}
	}
	break;
	case FINGERPRINT_TEMPLATE_ENUMERATING:
	LOG(DEBUG) << "onEnumerate(fid=" << msg->data.enumerated.finger.fid
	<< ", gid=" << msg->data.enumerated.finger.gid
	<< ", rem=" << msg->data.enumerated.remaining_templates << ")";
	if (!thisPtr->mClientCallback
	->onEnumerate(devId, msg->data.enumerated.finger.fid,
	msg->data.enumerated.finger.gid,
	msg->data.enumerated.remaining_templates)
	.isOk()) {
	LOG(ERROR) << "failed to invoke fingerprint onEnumerate callback";
	}
	break;
	}
	}

	void BiometricsFingerprint::handleEvent(int eventCode) {
	switch (eventCode) {
	#ifdef HAS_FINGERPRINT_GESTURES
	case SEM_FINGERPRINT_EVENT_GESTURE_SWIPE_DOWN:
	case SEM_FINGERPRINT_EVENT_GESTURE_SWIPE_UP:
	struct input_event event {};
	int keycode = eventCode == SEM_FINGERPRINT_EVENT_GESTURE_SWIPE_UP ?
	KEY_UP : KEY_DOWN;

	// Report the key
	event.type = EV_KEY;
	event.code = keycode;
	event.value = 1;
	if (write(uinputFd, &event, sizeof(event)) < 0) {
	LOG(ERROR) << "Write EV_KEY to uinput node failed";
	return;
	}

	// Force a flush with an EV_SYN
	event.type = EV_SYN;
	event.code = SYN_REPORT;
	event.value = 0;
	if (write(uinputFd, &event, sizeof(event)) < 0) {
	LOG(ERROR) << "Write EV_SYN to uinput node failed";
	return;
	}

	// Report the key
	event.type = EV_KEY;
	event.code = keycode;
	event.value = 0;
	if (write(uinputFd, &event, sizeof(event)) < 0) {
	LOG(ERROR) << "Write EV_KEY to uinput node failed";
	return;
	}

	// Force a flush with an EV_SYN
	event.type = EV_SYN;
	event.code = SYN_REPORT;
	event.value = 0;
	if (write(uinputFd, &event, sizeof(event)) < 0) {
	LOG(ERROR) << "Write EV_SYN to uinput node failed";
	return;
	}
	break;
	#endif
	}
	}

	int BiometricsFingerprint::request(int cmd, int param) {
	// TO-DO: input, output handling not implemented
	int result = ss_fingerprint_request(cmd, nullptr, 0, nullptr, 0, param);
	LOG(INFO) << "request(cmd=" << cmd << ", param=" << param << ", result=" << result << ")";
	return result;
	}

	int BiometricsFingerprint::waitForSensor(std::chrono::milliseconds pollWait,
	std::chrono::milliseconds timeOut) {
	int sensorStatus = SEM_SENSOR_STATUS_WORKING;
	std::chrono::milliseconds timeWaited = 0ms;
	while (sensorStatus != SEM_SENSOR_STATUS_OK) {
	if (sensorStatus == SEM_SENSOR_STATUS_CALIBRATION_ERROR
	\|\| sensorStatus == SEM_SENSOR_STATUS_ERROR){
	return -1;
	}
	if (timeWaited >= timeOut) {
	return -2;
	}
	sensorStatus = request(FINGERPRINT_REQUEST_GET_SENSOR_STATUS, 0);
	std::this_thread::sleep_for(pollWait);
	timeWaited += pollWait;
	}
	return 0;
	}

	} // namespace implementation
	} // namespace V2_3
	} // namespace fingerprint
	} // namespace biometrics
	} // namespace hardware
	} // namespace android