1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #include <errno.h>
17 #include <string.h>
18
19 #include <hardware/hardware.h>
20 #include <hardware/keymaster0.h>
21 #include <keymaster/soft_keymaster_device.h>
22
23 #include "trusty_keymaster_device.h"
24 #include "trusty_keymaster_ipc.h"
25
26 using keymaster::TrustyKeymasterDevice;
27
28 /*
29 * Generic device handling
30 */
trusty_keymaster_open(const hw_module_t * module __unused,const char * name,hw_device_t ** device)31 static int trusty_keymaster_open(const hw_module_t* module __unused, const char* name, hw_device_t** device) {
32 if (strcmp(name, KEYSTORE_KEYMASTER) != 0) {
33 return -EINVAL;
34 }
35 // Use softkeymaster in guest instead of connecting to host implementation of softkeymaster
36 *device = reinterpret_cast<hw_device_t*>((new keymaster::SoftKeymasterDevice())->keymaster2_device());
37 return 0;
38 }
39
40 static struct hw_module_methods_t keystore_module_methods = {
41 .open = trusty_keymaster_open,
42 };
43
44 struct keystore_module HAL_MODULE_INFO_SYM __attribute__((visibility("default"))) = {
45 .common =
46 {
47 .tag = HARDWARE_MODULE_TAG,
48 .module_api_version = KEYMASTER_MODULE_API_VERSION_2_0,
49 .hal_api_version = HARDWARE_HAL_API_VERSION,
50 .id = KEYSTORE_HARDWARE_MODULE_ID,
51 .name = "Trusty Keymaster HAL",
52 .author = "The Android Open Source Project",
53 .methods = &keystore_module_methods,
54 .dso = 0,
55 .reserved = {},
56 },
57 };
58