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platform_system_core/fingerprintd/FingerprintDaemonProxy.cpp

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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "fingerprintd"
#include <binder/IServiceManager.h>
#include <hardware/hardware.h>
#include <hardware/fingerprint.h>
#include <hardware/hw_auth_token.h>
#include <keystore/IKeystoreService.h>
#include <keystore/keystore.h> // for error codes
#include <utils/Log.h>
#include "FingerprintDaemonProxy.h"
namespace android {
FingerprintDaemonProxy* FingerprintDaemonProxy::sInstance = NULL;
// Supported fingerprint HAL version
static const uint16_t kVersion = HARDWARE_MODULE_API_VERSION(2, 0);
FingerprintDaemonProxy::FingerprintDaemonProxy() : mModule(NULL), mDevice(NULL), mCallback(NULL) {
}
FingerprintDaemonProxy::~FingerprintDaemonProxy() {
closeHal();
}
void FingerprintDaemonProxy::hal_notify_callback(const fingerprint_msg_t *msg) {
FingerprintDaemonProxy* instance = FingerprintDaemonProxy::getInstance();
const sp<IFingerprintDaemonCallback> callback = instance->mCallback;
if (callback == NULL) {
ALOGE("Invalid callback object");
return;
}
const int64_t device = (int64_t) instance->mDevice;
switch (msg->type) {
case FINGERPRINT_ERROR:
ALOGD("onError(%d)", msg->data.error);
callback->onError(device, msg->data.error);
break;
case FINGERPRINT_ACQUIRED:
ALOGD("onAcquired(%d)", msg->data.acquired.acquired_info);
callback->onAcquired(device, msg->data.acquired.acquired_info);
break;
case FINGERPRINT_AUTHENTICATED:
ALOGD("onAuthenticated(fid=%d, gid=%d)",
msg->data.authenticated.finger.fid,
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);
instance->notifyKeystore(hat, sizeof(msg->data.authenticated.hat));
}
callback->onAuthenticated(device,
msg->data.authenticated.finger.fid,
msg->data.authenticated.finger.gid);
break;
case FINGERPRINT_TEMPLATE_ENROLLING:
ALOGD("onEnrollResult(fid=%d, gid=%d, rem=%d)",
msg->data.enroll.finger.fid,
msg->data.enroll.finger.gid,
msg->data.enroll.samples_remaining);
callback->onEnrollResult(device,
msg->data.enroll.finger.fid,
msg->data.enroll.finger.gid,
msg->data.enroll.samples_remaining);
break;
case FINGERPRINT_TEMPLATE_REMOVED:
ALOGD("onRemove(fid=%d, gid=%d)",
msg->data.removed.finger.fid,
msg->data.removed.finger.gid);
callback->onRemoved(device,
msg->data.removed.finger.fid,
msg->data.removed.finger.gid);
break;
case FINGERPRINT_TEMPLATE_ENUMERATING:
ALOGD("onEnumerate(fid=%d, gid=%d, rem=%d)",
msg->data.enumerated.finger.fid,
msg->data.enumerated.finger.gid,
msg->data.enumerated.remaining_templates);
callback->onEnumerate(device,
msg->data.enumerated.finger.fid,
msg->data.enumerated.finger.gid,
msg->data.enumerated.remaining_templates);
break;
default:
ALOGE("invalid msg type: %d", msg->type);
return;
}
}
void FingerprintDaemonProxy::notifyKeystore(const uint8_t *auth_token, const size_t auth_token_length) {
if (auth_token != NULL && auth_token_length > 0) {
// TODO: cache service?
sp < IServiceManager > sm = defaultServiceManager();
sp < IBinder > binder = sm->getService(String16("android.security.keystore"));
sp < IKeystoreService > service = interface_cast < IKeystoreService > (binder);
if (service != NULL) {
status_t ret = service->addAuthToken(auth_token, auth_token_length);
if (ret != ResponseCode::NO_ERROR) {
ALOGE("Falure sending auth token to KeyStore: %d", ret);
}
} else {
ALOGE("Unable to communicate with KeyStore");
}
}
}
void FingerprintDaemonProxy::init(const sp<IFingerprintDaemonCallback>& callback) {
if (mCallback != NULL && IInterface::asBinder(callback) != IInterface::asBinder(mCallback)) {
IInterface::asBinder(mCallback)->unlinkToDeath(this);
}
IInterface::asBinder(callback)->linkToDeath(this);
mCallback = callback;
}
int32_t FingerprintDaemonProxy::enroll(const uint8_t* token, ssize_t tokenSize, int32_t groupId,
int32_t timeout) {
ALOG(LOG_VERBOSE, LOG_TAG, "enroll(gid=%d, timeout=%d)\n", groupId, timeout);
if (tokenSize != sizeof(hw_auth_token_t) ) {
ALOG(LOG_VERBOSE, LOG_TAG, "enroll() : invalid token size %zu\n", tokenSize);
return -1;
}
const hw_auth_token_t* authToken = reinterpret_cast<const hw_auth_token_t*>(token);
return mDevice->enroll(mDevice, authToken, groupId, timeout);
}
uint64_t FingerprintDaemonProxy::preEnroll() {
return mDevice->pre_enroll(mDevice);
}
int32_t FingerprintDaemonProxy::postEnroll() {
return mDevice->post_enroll(mDevice);
}
int32_t FingerprintDaemonProxy::stopEnrollment() {
ALOG(LOG_VERBOSE, LOG_TAG, "stopEnrollment()\n");
return mDevice->cancel(mDevice);
}
int32_t FingerprintDaemonProxy::authenticate(uint64_t sessionId, uint32_t groupId) {
ALOG(LOG_VERBOSE, LOG_TAG, "authenticate(sid=%" PRId64 ", gid=%d)\n", sessionId, groupId);
return mDevice->authenticate(mDevice, sessionId, groupId);
}
int32_t FingerprintDaemonProxy::stopAuthentication() {
ALOG(LOG_VERBOSE, LOG_TAG, "stopAuthentication()\n");
return mDevice->cancel(mDevice);
}
int32_t FingerprintDaemonProxy::remove(int32_t fingerId, int32_t groupId) {
ALOG(LOG_VERBOSE, LOG_TAG, "remove(fid=%d, gid=%d)\n", fingerId, groupId);
return mDevice->remove(mDevice, groupId, fingerId);
}
int32_t FingerprintDaemonProxy::enumerate() {
ALOG(LOG_VERBOSE, LOG_TAG, "enumerate()\n");
return mDevice->enumerate(mDevice);
}
uint64_t FingerprintDaemonProxy::getAuthenticatorId() {
return mDevice->get_authenticator_id(mDevice);
}
int32_t FingerprintDaemonProxy::setActiveGroup(int32_t groupId, const uint8_t* path,
ssize_t pathlen) {
if (pathlen >= PATH_MAX || pathlen <= 0) {
ALOGE("Bad path length: %zd", pathlen);
return -1;
}
// Convert to null-terminated string
char path_name[PATH_MAX];
memcpy(path_name, path, pathlen);
path_name[pathlen] = '\0';
ALOG(LOG_VERBOSE, LOG_TAG, "setActiveGroup(%d, %s, %zu)", groupId, path_name, pathlen);
return mDevice->set_active_group(mDevice, groupId, path_name);
}
int64_t FingerprintDaemonProxy::openHal() {
ALOG(LOG_VERBOSE, LOG_TAG, "nativeOpenHal()\n");
int err;
const hw_module_t *hw_module = NULL;
if (0 != (err = hw_get_module(FINGERPRINT_HARDWARE_MODULE_ID, &hw_module))) {
ALOGE("Can't open fingerprint HW Module, error: %d", err);
return 0;
}
if (NULL == hw_module) {
ALOGE("No valid fingerprint module");
return 0;
}
mModule = reinterpret_cast<const fingerprint_module_t*>(hw_module);
if (mModule->common.methods->open == NULL) {
ALOGE("No valid open method");
return 0;
}
hw_device_t *device = NULL;
if (0 != (err = mModule->common.methods->open(hw_module, NULL, &device))) {
ALOGE("Can't open fingerprint methods, error: %d", err);
return 0;
}
if (kVersion != device->version) {
ALOGE("Wrong fp version. Expected %d, got %d", kVersion, device->version);
// return 0; // FIXME
}
mDevice = reinterpret_cast<fingerprint_device_t*>(device);
err = mDevice->set_notify(mDevice, hal_notify_callback);
if (err < 0) {
ALOGE("Failed in call to set_notify(), err=%d", err);
return 0;
}
// Sanity check - remove
if (mDevice->notify != hal_notify_callback) {
ALOGE("NOTIFY not set properly: %p != %p", mDevice->notify, hal_notify_callback);
}
ALOG(LOG_VERBOSE, LOG_TAG, "fingerprint HAL successfully initialized");
return reinterpret_cast<int64_t>(mDevice); // This is just a handle
}
int32_t FingerprintDaemonProxy::closeHal() {
ALOG(LOG_VERBOSE, LOG_TAG, "nativeCloseHal()\n");
if (mDevice == NULL) {
ALOGE("No valid device");
return -ENOSYS;
}
int err;
if (0 != (err = mDevice->common.close(reinterpret_cast<hw_device_t*>(mDevice)))) {
ALOGE("Can't close fingerprint module, error: %d", err);
return err;
}
mDevice = NULL;
return 0;
}
void FingerprintDaemonProxy::binderDied(const wp<IBinder>& who) {
ALOGD("binder died");
int err;
if (0 != (err = closeHal())) {
ALOGE("Can't close fingerprint device, error: %d", err);
}
if (IInterface::asBinder(mCallback) == who) {
mCallback = NULL;
}
}
}
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