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,
30 hw_device_t** device) {
31 if (strcmp(name, KEYSTORE_KEYMASTER) != 0)
32 return -EINVAL;
33
34 TrustyKeymasterDevice* dev = new TrustyKeymasterDevice(module);
35 if (dev == NULL)
36 return -ENOMEM;
37 *device = dev->hw_device();
38 // Do not delete dev; it will get cleaned up when the caller calls device->close(), and must
39 // exist until then.
40 return 0;
41 }
42
43 static struct hw_module_methods_t keystore_module_methods = {
44 .open = trusty_keymaster_open,
45 };
46
47 struct keystore_module HAL_MODULE_INFO_SYM __attribute__((visibility("default"))) = {
48 .common =
49 {
50 .tag = HARDWARE_MODULE_TAG,
51 .module_api_version = KEYMASTER_MODULE_API_VERSION_0_3,
52 .hal_api_version = HARDWARE_HAL_API_VERSION,
53 .id = KEYSTORE_HARDWARE_MODULE_ID,
54 .name = "Trusty Keymaster HAL",
55 .author = "The Android Open Source Project",
56 .methods = &keystore_module_methods,
57 .dso = 0,
58 .reserved = {},
59 },
60 };
61