/*
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* Copyright (C) 2014 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_TAG "Fingerprint-JNI"
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#include <nativehelper/JNIHelp.h>
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#include <inttypes.h>
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#include <android_runtime/AndroidRuntime.h>
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#include <android_runtime/Log.h>
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#include <android_os_MessageQueue.h>
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#include <binder/IServiceManager.h>
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#include <utils/String16.h>
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#include <utils/Looper.h>
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#include <keystore/IKeystoreService.h>
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#include <keystore/keystore.h> // for error code
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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 <utils/Log.h>
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#include "core_jni_helpers.h"
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namespace android {
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static const uint16_t kVersion = HARDWARE_MODULE_API_VERSION(2, 0);
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static const char* FINGERPRINT_SERVICE = "com/android/server/fingerprint/FingerprintService";
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static struct {
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jclass clazz;
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jmethodID notify;
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} gFingerprintServiceClassInfo;
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static struct {
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fingerprint_module_t const* module;
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fingerprint_device_t *device;
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} gContext;
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static sp<Looper> gLooper;
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static jobject gCallback;
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class CallbackHandler : public MessageHandler {
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int type;
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int arg1, arg2, arg3;
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public:
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CallbackHandler(int type, int arg1, int arg2, int arg3)
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: type(type), arg1(arg1), arg2(arg2), arg3(arg3) { }
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virtual void handleMessage(const Message& message) {
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//ALOG(LOG_VERBOSE, LOG_TAG, "hal_notify(msg=%d, arg1=%d, arg2=%d)\n", msg.type, arg1, arg2);
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JNIEnv* env = AndroidRuntime::getJNIEnv();
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env->CallVoidMethod(gCallback, gFingerprintServiceClassInfo.notify, type, arg1, arg2, arg3);
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}
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};
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static void notifyKeystore(uint8_t *auth_token, 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 != 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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// Called by the HAL to notify us of fingerprint events
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static void hal_notify_callback(fingerprint_msg_t msg) {
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uint32_t arg1 = 0;
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uint32_t arg2 = 0;
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uint32_t arg3 = 0;
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switch (msg.type) {
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case FINGERPRINT_ERROR:
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arg1 = msg.data.error;
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break;
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case FINGERPRINT_ACQUIRED:
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arg1 = msg.data.acquired.acquired_info;
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break;
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case FINGERPRINT_AUTHENTICATED:
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arg1 = msg.data.authenticated.finger.fid;
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arg2 = msg.data.authenticated.finger.gid;
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if (arg1 != 0) {
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notifyKeystore(reinterpret_cast<uint8_t *>(&msg.data.authenticated.hat),
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sizeof(msg.data.authenticated.hat));
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}
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break;
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case FINGERPRINT_TEMPLATE_ENROLLING:
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arg1 = msg.data.enroll.finger.fid;
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arg2 = msg.data.enroll.finger.gid;
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arg3 = msg.data.enroll.samples_remaining;
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break;
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case FINGERPRINT_TEMPLATE_REMOVED:
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arg1 = msg.data.removed.finger.fid;
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arg2 = msg.data.removed.finger.gid;
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break;
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default:
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ALOGE("fingerprint: invalid msg: %d", msg.type);
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return;
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}
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// This call potentially comes in on a thread not owned by us. Hand it off to our
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// looper so it runs on our thread when calling back to FingerprintService.
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// CallbackHandler object is reference-counted, so no cleanup necessary.
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gLooper->sendMessage(new CallbackHandler(msg.type, arg1, arg2, arg3), Message());
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}
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static void nativeInit(JNIEnv *env, jobject clazz, jobject mQueue, jobject callbackObj) {
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ALOG(LOG_VERBOSE, LOG_TAG, "nativeInit()\n");
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gCallback = MakeGlobalRefOrDie(env, callbackObj);
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gLooper = android_os_MessageQueue_getMessageQueue(env, mQueue)->getLooper();
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}
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static jint nativeEnroll(JNIEnv* env, jobject clazz, jbyteArray token, jint groupId, jint timeout) {
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ALOG(LOG_VERBOSE, LOG_TAG, "nativeEnroll(gid=%d, timeout=%d)\n", groupId, timeout);
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const int tokenSize = env->GetArrayLength(token);
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jbyte* tokenData = env->GetByteArrayElements(token, 0);
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if (tokenSize != sizeof(hw_auth_token_t)) {
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ALOG(LOG_VERBOSE, LOG_TAG, "nativeEnroll() : invalid token size %d\n", tokenSize);
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return -1;
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}
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int ret = gContext.device->enroll(gContext.device,
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reinterpret_cast<const hw_auth_token_t*>(tokenData), groupId, timeout);
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env->ReleaseByteArrayElements(token, tokenData, 0);
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return reinterpret_cast<jint>(ret);
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}
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static jlong nativePreEnroll(JNIEnv* env, jobject clazz) {
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uint64_t ret = gContext.device->pre_enroll(gContext.device);
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// ALOG(LOG_VERBOSE, LOG_TAG, "nativePreEnroll(), result = %llx", ret);
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return reinterpret_cast<jlong>((int64_t)ret);
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}
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static jint nativeStopEnrollment(JNIEnv* env, jobject clazz) {
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ALOG(LOG_VERBOSE, LOG_TAG, "nativeStopEnrollment()\n");
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int ret = gContext.device->cancel(gContext.device);
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return reinterpret_cast<jint>(ret);
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}
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static jint nativeAuthenticate(JNIEnv* env, jobject clazz, jlong sessionId, jint groupId) {
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ALOG(LOG_VERBOSE, LOG_TAG, "nativeAuthenticate(sid=%" PRId64 ", gid=%d)\n", sessionId, groupId);
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int ret = gContext.device->authenticate(gContext.device, sessionId, groupId);
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return reinterpret_cast<jint>(ret);
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}
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static jint nativeStopAuthentication(JNIEnv* env, jobject clazz) {
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ALOG(LOG_VERBOSE, LOG_TAG, "nativeStopAuthentication()\n");
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int ret = gContext.device->cancel(gContext.device);
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return reinterpret_cast<jint>(ret);
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}
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static jint nativeRemove(JNIEnv* env, jobject clazz, jint fingerId, jint groupId) {
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ALOG(LOG_VERBOSE, LOG_TAG, "nativeRemove(fid=%d, gid=%d)\n", fingerId, groupId);
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fingerprint_finger_id_t finger;
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finger.fid = fingerId;
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finger.gid = groupId;
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int ret = gContext.device->remove(gContext.device, finger);
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return reinterpret_cast<jint>(ret);
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}
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static jlong nativeGetAuthenticatorId(JNIEnv *, jobject clazz) {
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return gContext.device->get_authenticator_id(gContext.device);
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}
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static jint nativeSetActiveGroup(JNIEnv *env, jobject clazz, jint gid, jbyteArray path) {
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const int pathSize = env->GetArrayLength(path);
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jbyte* pathData = env->GetByteArrayElements(path, 0);
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if (pathSize >= PATH_MAX) {
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ALOGE("Path name is too long\n");
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return -1;
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}
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char path_name[PATH_MAX] = {0};
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memcpy(path_name, pathData, pathSize);
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ALOG(LOG_VERBOSE, LOG_TAG, "nativeSetActiveGroup() path: %s, gid: %d\n", path_name, gid);
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int result = gContext.device->set_active_group(gContext.device, gid, path_name);
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env->ReleaseByteArrayElements(path, pathData, 0);
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return result;
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}
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static jint nativeOpenHal(JNIEnv* env, jobject clazz) {
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ALOG(LOG_VERBOSE, LOG_TAG, "nativeOpenHal()\n");
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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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gContext.module = reinterpret_cast<const fingerprint_module_t*>(hw_module);
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if (gContext.module->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 = gContext.module->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; // FIXME
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}
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gContext.device = reinterpret_cast<fingerprint_device_t*>(device);
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err = gContext.device->set_notify(gContext.device, 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 (gContext.device->notify != hal_notify_callback) {
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ALOGE("NOTIFY not set properly: %p != %p", gContext.device->notify, hal_notify_callback);
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}
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ALOG(LOG_VERBOSE, LOG_TAG, "fingerprint HAL successfully initialized");
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return reinterpret_cast<jlong>(gContext.device);
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}
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static jint nativeCloseHal(JNIEnv* env, jobject clazz) {
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return -ENOSYS; // TODO
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}
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// ----------------------------------------------------------------------------
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// TODO: clean up void methods
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static const JNINativeMethod g_methods[] = {
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{ "nativeAuthenticate", "(JI)I", (void*)nativeAuthenticate },
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{ "nativeStopAuthentication", "()I", (void*)nativeStopAuthentication },
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{ "nativeEnroll", "([BII)I", (void*)nativeEnroll },
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{ "nativeSetActiveGroup", "(I[B)I", (void*)nativeSetActiveGroup },
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{ "nativePreEnroll", "()J", (void*)nativePreEnroll },
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{ "nativeStopEnrollment", "()I", (void*)nativeStopEnrollment },
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{ "nativeRemove", "(II)I", (void*)nativeRemove },
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{ "nativeGetAuthenticatorId", "()J", (void*)nativeGetAuthenticatorId },
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{ "nativeOpenHal", "()I", (void*)nativeOpenHal },
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{ "nativeCloseHal", "()I", (void*)nativeCloseHal },
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{ "nativeInit","(Landroid/os/MessageQueue;"
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"Lcom/android/server/fingerprint/FingerprintService;)V", (void*)nativeInit }
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};
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int register_android_server_fingerprint_FingerprintService(JNIEnv* env) {
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jclass clazz = FindClassOrDie(env, FINGERPRINT_SERVICE);
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gFingerprintServiceClassInfo.clazz = MakeGlobalRefOrDie(env, clazz);
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gFingerprintServiceClassInfo.notify =
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GetMethodIDOrDie(env, gFingerprintServiceClassInfo.clazz,"notify", "(IIII)V");
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int result = RegisterMethodsOrDie(env, FINGERPRINT_SERVICE, g_methods, NELEM(g_methods));
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ALOG(LOG_VERBOSE, LOG_TAG, "FingerprintManager JNI ready.\n");
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return result;
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}
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} // namespace android
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