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
22 #include "trusty_keymaster_device.h"
23
24 using keymaster::TrustyKeymasterDevice;
25
26 /*
27 * Generic device handling
28 */
trusty_keymaster_open(const hw_module_t * module,const char * name,hw_device_t ** device)29 static int trusty_keymaster_open(const hw_module_t* module, const char* name, hw_device_t** device) {
30 if (strcmp(name, KEYSTORE_KEYMASTER) != 0) {
31 return -EINVAL;
32 }
33
34 TrustyKeymasterDevice* dev = new TrustyKeymasterDevice(module);
35 if (dev == NULL) {
36 return -ENOMEM;
37 }
38 *device = dev->hw_device();
39 // Do not delete dev; it will get cleaned up when the caller calls device->close(), and must
40 // exist until then.
41 return 0;
42 }
43
44 static struct hw_module_methods_t keystore_module_methods = {
45 .open = trusty_keymaster_open,
46 };
47
48 struct keystore_module HAL_MODULE_INFO_SYM __attribute__((visibility("default"))) = {
49 .common =
50 {
51 .tag = HARDWARE_MODULE_TAG,
52 .module_api_version = KEYMASTER_MODULE_API_VERSION_2_0,
53 .hal_api_version = HARDWARE_HAL_API_VERSION,
54 .id = KEYSTORE_HARDWARE_MODULE_ID,
55 .name = "Trusty Keymaster HAL",
56 .author = "The Android Open Source Project",
57 .methods = &keystore_module_methods,
58 .dso = 0,
59 .reserved = {},
60 },
61 };
62