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/*
* Copyright (C) 2017 Jesse Chan, 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 "SS Fingerprint HAL"
#include <dlfcn.h>
#include <stdlib.h>
#include <errno.h>
#include <cutils/log.h>
#include <hardware/hardware.h>
#include <hardware/fingerprint.h>
#include <utils/threads.h>
typedef struct {
void *libhandle;
int (*ss_fingerprint_close)(void);
uint64_t (*ss_fingerprint_pre_enroll)(void);
int (*ss_fingerprint_enroll)(const hw_auth_token_t *hat, uint32_t gid, uint32_t timeout_sec);
int (*ss_fingerprint_post_enroll)(void);
uint64_t (*ss_fingerprint_get_auth_id)(void);
int (*ss_fingerprint_remove)(uint32_t gid, uint32_t fid);
int (*ss_fingerprint_set_active_group)(uint32_t gid, const char *store_path);
int (*ss_fingerprint_authenticate)(uint64_t operation_id, uint32_t gid);
int (*ss_set_notify_callback)(fingerprint_notify_t notify);
int (*ss_fingerprint_cancel)(void);
int (*ss_fingerprint_open)(const char *id);
} bauth_server_handle_t;
bauth_server_handle_t* bauth_handle;
static fingerprint_notify_t original_notify;
static int load_bauth_server(void)
{
bauth_handle = (bauth_server_handle_t *)malloc(sizeof(bauth_server_handle_t));
if (bauth_handle == NULL)
goto no_memory;
void *libhandle = bauth_handle->libhandle;
libhandle = dlopen("libbauthserver.so", RTLD_NOW);
bauth_handle->ss_fingerprint_close = dlsym(libhandle, "ss_fingerprint_close");
bauth_handle->ss_fingerprint_pre_enroll = dlsym(libhandle, "ss_fingerprint_pre_enroll");
bauth_handle->ss_fingerprint_enroll = dlsym(libhandle, "ss_fingerprint_enroll");
bauth_handle->ss_fingerprint_post_enroll = dlsym(libhandle, "ss_fingerprint_post_enroll");
bauth_handle->ss_fingerprint_get_auth_id = dlsym(libhandle, "ss_fingerprint_get_auth_id");
bauth_handle->ss_fingerprint_remove = dlsym(libhandle, "ss_fingerprint_remove");
bauth_handle->ss_fingerprint_set_active_group = dlsym(libhandle, "ss_fingerprint_set_active_group");
bauth_handle->ss_fingerprint_authenticate = dlsym(libhandle, "ss_fingerprint_authenticate");
bauth_handle->ss_set_notify_callback = dlsym(libhandle, "ss_set_notify_callback");
bauth_handle->ss_fingerprint_cancel = dlsym(libhandle, "ss_fingerprint_cancel");
bauth_handle->ss_fingerprint_open = dlsym(libhandle, "ss_fingerprint_open");
return 0;
no_memory:
ALOGE("%s: not enough memory to load the libhandle", __func__);
return -ENOMEM;
}
static void hal_notify_convert(const fingerprint_msg_t *msg)
{
fingerprint_msg_t *new_msg = (fingerprint_msg_t *)msg;
switch (msg->type) {
case FINGERPRINT_TEMPLATE_ENROLLING:
new_msg->data.enroll.samples_remaining = 100 - msg->data.enroll.samples_remaining;
break;
default:
break;
}
return original_notify(new_msg);
}
static int fingerprint_close(hw_device_t *dev)
{
bauth_handle->ss_fingerprint_close();
if (dev)
free(dev);
return 0;
}
static uint64_t fingerprint_pre_enroll(struct fingerprint_device __unused *dev)
{
return bauth_handle->ss_fingerprint_pre_enroll();
}
static int fingerprint_enroll(struct fingerprint_device __unused *dev, const hw_auth_token_t *hat,
uint32_t gid, uint32_t timeout_sec)
{
return bauth_handle->ss_fingerprint_enroll(hat, gid, timeout_sec);
}
static int fingerprint_post_enroll(struct fingerprint_device __unused *dev)
{
return bauth_handle->ss_fingerprint_post_enroll();
}
static uint64_t fingerprint_get_auth_id(struct fingerprint_device __unused *dev)
{
return bauth_handle->ss_fingerprint_get_auth_id();
}
static int fingerprint_cancel(struct fingerprint_device __unused *dev)
{
return bauth_handle->ss_fingerprint_cancel();
}
static int fingerprint_remove(struct fingerprint_device __unused *dev, uint32_t gid, uint32_t fid)
{
return bauth_handle->ss_fingerprint_remove(gid, fid);
}
static int fingerprint_set_active_group(struct fingerprint_device __unused *dev, uint32_t gid,
const char *store_path)
{
return bauth_handle->ss_fingerprint_set_active_group(gid, store_path);
}
static int fingerprint_authenticate(struct fingerprint_device __unused *dev, uint64_t operation_id,
uint32_t gid)
{
return bauth_handle->ss_fingerprint_authenticate(operation_id, gid);
}
static int set_notify_callback(struct fingerprint_device *dev, fingerprint_notify_t notify)
{
/* Decorate with locks */
dev->notify = notify;
original_notify = notify;
return bauth_handle->ss_set_notify_callback(hal_notify_convert);
}
static int fingerprint_open(const hw_module_t* module, const char *id, hw_device_t** device)
{
int ret;
fingerprint_device_t *dev = NULL;
if (device == NULL) {
ALOGE("NULL device on open");
ret = -ENODEV;
goto fail;
}
ret = load_bauth_server();
if (ret < 0)
goto fail;
dev = (fingerprint_device_t*)calloc(1, sizeof(fingerprint_device_t));
if (dev == NULL) {
ret = -ENOMEM;
goto fail;
}
dev->common.tag = HARDWARE_DEVICE_TAG;
dev->common.version = FINGERPRINT_MODULE_API_VERSION_2_0;
dev->common.module = (struct hw_module_t*) module;
dev->common.close = fingerprint_close;
dev->pre_enroll = fingerprint_pre_enroll;
dev->enroll = fingerprint_enroll;
dev->post_enroll = fingerprint_post_enroll;
dev->get_authenticator_id = fingerprint_get_auth_id;
dev->cancel = fingerprint_cancel;
dev->remove = fingerprint_remove;
dev->set_active_group = fingerprint_set_active_group;
dev->authenticate = fingerprint_authenticate;
dev->set_notify = set_notify_callback;
dev->notify = NULL;
*device = (hw_device_t*) dev;
return (*bauth_handle->ss_fingerprint_open)(id);
fail:
ALOGE("%s: failed to open FP device (ret=%d)", __func__, ret);
return ret;
}
static struct hw_module_methods_t fingerprint_module_methods = {
.open = fingerprint_open,
};
fingerprint_module_t HAL_MODULE_INFO_SYM = {
.common = {
.tag = HARDWARE_MODULE_TAG,
.module_api_version = FINGERPRINT_MODULE_API_VERSION_2_0,
.hal_api_version = HARDWARE_HAL_API_VERSION,
.id = FINGERPRINT_HARDWARE_MODULE_ID,
.name = "Samsung TZ Fingerprint HAL",
.author = "The LineageOS Project",
.methods = &fingerprint_module_methods,
},
};
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