249 lines
8.1 KiB
C++
249 lines
8.1 KiB
C++
/*
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* Copyright (C) 2015 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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#define LOG_NDEBUG 0
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#define LOG_TAG "FingerprintDaemonProxy"
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#include <cutils/properties.h>
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#include <binder/IServiceManager.h>
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#include <hardware/hardware.h>
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#include <hardware/fingerprint.h>
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#include <hardware/hw_auth_token.h>
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#include <keystore/IKeystoreService.h>
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#include <keystore/keystore.h> // for error codes
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#include <utils/Log.h>
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#include "FingerprintDaemonProxy.h"
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namespace android {
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FingerprintDaemonProxy* FingerprintDaemonProxy::sInstance = NULL;
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// Supported fingerprint HAL version
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static const uint16_t kVersion = HARDWARE_MODULE_API_VERSION(2, 0);
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FingerprintDaemonProxy::FingerprintDaemonProxy() : mModule(NULL), mDevice(NULL), mCallback(NULL) {
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}
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FingerprintDaemonProxy::~FingerprintDaemonProxy() {
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closeHal();
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}
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void FingerprintDaemonProxy::hal_notify_callback(const fingerprint_msg_t *msg) {
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FingerprintDaemonProxy* instance = FingerprintDaemonProxy::getInstance();
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const sp<IFingerprintDaemonCallback> callback = instance->mCallback;
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if (callback == NULL) {
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ALOGE("Invalid callback object");
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return;
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}
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const int64_t device = (int64_t) instance->mDevice;
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switch (msg->type) {
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case FINGERPRINT_ERROR:
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callback->onError(device, msg->data.error);
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break;
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case FINGERPRINT_ACQUIRED:
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callback->onAcquired(device, msg->data.acquired.acquired_info);
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break;
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case FINGERPRINT_AUTHENTICATED:
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if (msg->data.authenticated.finger.fid != 0) {
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const uint8_t* hat = reinterpret_cast<const uint8_t *>(&msg->data.authenticated.hat);
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instance->notifyKeystore(hat, sizeof(msg->data.authenticated.hat));
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}
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callback->onAuthenticated(device,
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msg->data.authenticated.finger.fid,
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msg->data.authenticated.finger.gid);
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break;
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case FINGERPRINT_TEMPLATE_ENROLLING:
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callback->onEnrollResult(device,
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msg->data.enroll.finger.fid,
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msg->data.enroll.finger.gid,
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msg->data.enroll.samples_remaining);
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break;
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case FINGERPRINT_TEMPLATE_REMOVED:
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callback->onRemoved(device,
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msg->data.removed.finger.fid,
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msg->data.removed.finger.gid);
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break;
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case FINGERPRINT_TEMPLATE_ENUMERATING:
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callback->onEnumerate(device,
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msg->data.enumerated.finger.fid,
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msg->data.enumerated.finger.gid,
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msg->data.enumerated.remaining_templates);
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break;
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default:
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ALOGE("invalid msg type: %d", msg->type);
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return;
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}
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}
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void FingerprintDaemonProxy::notifyKeystore(const uint8_t *auth_token, const size_t auth_token_length) {
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if (auth_token != NULL && auth_token_length > 0) {
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// TODO: cache service?
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sp < IServiceManager > sm = defaultServiceManager();
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sp < IBinder > binder = sm->getService(String16("android.security.keystore"));
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sp < IKeystoreService > service = interface_cast < IKeystoreService > (binder);
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if (service != NULL) {
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status_t ret = service->addAuthToken(auth_token, auth_token_length);
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if (ret != (int)ResponseCode::NO_ERROR) {
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ALOGE("Falure sending auth token to KeyStore: %d", ret);
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}
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} else {
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ALOGE("Unable to communicate with KeyStore");
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}
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}
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}
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void FingerprintDaemonProxy::init(const sp<IFingerprintDaemonCallback>& callback) {
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if (mCallback != NULL && IInterface::asBinder(callback) != IInterface::asBinder(mCallback)) {
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IInterface::asBinder(mCallback)->unlinkToDeath(this);
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}
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IInterface::asBinder(callback)->linkToDeath(this);
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mCallback = callback;
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}
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int32_t FingerprintDaemonProxy::enroll(const uint8_t* token, ssize_t tokenSize, int32_t groupId,
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int32_t timeout) {
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if (tokenSize != sizeof(hw_auth_token_t) ) {
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ALOGE("enroll() : invalid token size %zu\n", tokenSize);
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return -1;
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}
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const hw_auth_token_t* authToken = reinterpret_cast<const hw_auth_token_t*>(token);
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return mDevice->enroll(mDevice, authToken, groupId, timeout);
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}
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uint64_t FingerprintDaemonProxy::preEnroll() {
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return mDevice->pre_enroll(mDevice);
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}
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int32_t FingerprintDaemonProxy::postEnroll() {
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return mDevice->post_enroll(mDevice);
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}
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int32_t FingerprintDaemonProxy::stopEnrollment() {
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return mDevice->cancel(mDevice);
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}
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int32_t FingerprintDaemonProxy::authenticate(uint64_t sessionId, uint32_t groupId) {
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return mDevice->authenticate(mDevice, sessionId, groupId);
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}
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int32_t FingerprintDaemonProxy::stopAuthentication() {
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return mDevice->cancel(mDevice);
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}
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int32_t FingerprintDaemonProxy::remove(int32_t fingerId, int32_t groupId) {
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return mDevice->remove(mDevice, groupId, fingerId);
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}
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int32_t FingerprintDaemonProxy::enumerate() {
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return mDevice->enumerate(mDevice);
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}
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int32_t FingerprintDaemonProxy::cancel() {
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int ret = mDevice->cancel(mDevice);
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return ret;
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}
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uint64_t FingerprintDaemonProxy::getAuthenticatorId() {
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return mDevice->get_authenticator_id(mDevice);
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}
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int32_t FingerprintDaemonProxy::setActiveGroup(int32_t groupId, const uint8_t* path,
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ssize_t pathlen) {
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if (pathlen >= PATH_MAX || pathlen <= 0) {
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ALOGE("Bad path length: %zd", pathlen);
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return -1;
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}
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// Convert to null-terminated string
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char path_name[PATH_MAX];
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memcpy(path_name, path, pathlen);
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path_name[pathlen] = '\0';
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return mDevice->set_active_group(mDevice, groupId, path_name);
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}
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int64_t FingerprintDaemonProxy::openHal() {
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int err;
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const hw_module_t *hw_module = NULL;
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if (0 != (err = hw_get_module(FINGERPRINT_HARDWARE_MODULE_ID, &hw_module))) {
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ALOGE("Can't open fingerprint HW Module, error: %d", err);
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return 0;
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}
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if (NULL == hw_module) {
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ALOGE("No valid fingerprint module");
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return 0;
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}
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mModule = reinterpret_cast<const fingerprint_module_t*>(hw_module);
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if (mModule->common.methods->open == NULL) {
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ALOGE("No valid open method");
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return 0;
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}
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hw_device_t *device = NULL;
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if (0 != (err = mModule->common.methods->open(hw_module, NULL, &device))) {
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ALOGE("Can't open fingerprint methods, error: %d", err);
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return 0;
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}
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if (kVersion != device->version) {
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ALOGE("Wrong fp version. Expected %d, got %d", kVersion, device->version);
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// return 0;
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}
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mDevice = reinterpret_cast<fingerprint_device_t*>(device);
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err = mDevice->set_notify(mDevice, hal_notify_callback);
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if (err < 0) {
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ALOGE("Failed in call to set_notify(), err=%d", err);
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return 0;
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}
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// Sanity check - remove
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if (mDevice->notify != hal_notify_callback) {
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ALOGE("NOTIFY not set properly: %p != %p", mDevice->notify, hal_notify_callback);
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}
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ALOGE("fingerprint HAL successfully initialized");
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return reinterpret_cast<int64_t>(mDevice); // This is just a handle
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}
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int32_t FingerprintDaemonProxy::closeHal() {
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if (mDevice == NULL) {
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ALOGE("No valid device");
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return -ENOSYS;
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}
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int err;
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if (0 != (err = mDevice->common.close(reinterpret_cast<hw_device_t*>(mDevice)))) {
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ALOGE("Can't close fingerprint module, error: %d", err);
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return err;
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}
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mDevice = NULL;
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return 0;
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}
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void FingerprintDaemonProxy::binderDied(const wp<IBinder>& who) {
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int err;
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if (0 != (err = closeHal())) {
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ALOGE("Can't close fingerprint device, error: %d", err);
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}
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if (IInterface::asBinder(mCallback) == who) {
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mCallback = NULL;
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}
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}
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}
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