blob: 8b416c3f9acc5d792114edef2aa02da8ad568cb9 [file] [log] [blame]
/*
**
** Copyright 2016, 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 "android.hardware.keymaster@3.0-impl"
#include "KeymasterDevice.h"
#include <log/log.h>
#include <AndroidKeymaster3Device.h>
#include <hardware/keymaster1.h>
#include <hardware/keymaster2.h>
#include <hardware/keymaster_defs.h>
namespace android {
namespace hardware {
namespace keymaster {
namespace V3_0 {
namespace implementation {
static int get_keymaster1_dev(keymaster1_device_t** dev, const hw_module_t* mod) {
int rc = keymaster1_open(mod, dev);
if (rc) {
ALOGE("Error %d opening keystore keymaster1 device", rc);
if (*dev) {
(*dev)->common.close(&(*dev)->common);
*dev = nullptr;
}
}
return rc;
}
static int get_keymaster2_dev(keymaster2_device_t** dev, const hw_module_t* mod) {
int rc = keymaster2_open(mod, dev);
if (rc) {
ALOGE("Error %d opening keystore keymaster2 device", rc);
*dev = nullptr;
}
return rc;
}
static IKeymasterDevice* createKeymaster3Device() {
const hw_module_t* mod = nullptr;
int rc = hw_get_module_by_class(KEYSTORE_HARDWARE_MODULE_ID, NULL, &mod);
if (rc) {
ALOGI("Could not find any keystore module, using software-only implementation.");
// SoftKeymasterDevice will be deleted by keymaster_device_release()
return ::keymaster::ng::CreateKeymasterDevice();
}
if (mod->module_api_version < KEYMASTER_MODULE_API_VERSION_1_0) {
return nullptr;
} else if (mod->module_api_version == KEYMASTER_MODULE_API_VERSION_1_0) {
keymaster1_device_t* dev = nullptr;
if (get_keymaster1_dev(&dev, mod)) {
return nullptr;
}
return ::keymaster::ng::CreateKeymasterDevice(dev);
} else {
keymaster2_device_t* dev = nullptr;
if (get_keymaster2_dev(&dev, mod)) {
return nullptr;
}
return ::keymaster::ng::CreateKeymasterDevice(dev);
}
}
IKeymasterDevice* HIDL_FETCH_IKeymasterDevice(const char* name) {
ALOGI("Fetching keymaster device name %s", name);
if (name && strcmp(name, "softwareonly") == 0) {
return ::keymaster::ng::CreateKeymasterDevice();
} else if (name && strcmp(name, "default") == 0) {
return createKeymaster3Device();
}
return nullptr;
}
} // namespace implementation
} // namespace V3_0
} // namespace keymaster
} // namespace hardware
} // namespace android