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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/legacy/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 
35     TrustyKeymasterDevice* dev = new TrustyKeymasterDevice(module);
36     if (dev == NULL) {
37         return -ENOMEM;
38     }
39     *device = dev->hw_device();
40     // Do not delete dev; it will get cleaned up when the caller calls device->close(), and must
41     // exist until then.
42     return 0;
43 }
44 
45 static struct hw_module_methods_t keystore_module_methods = {
46         .open = trusty_keymaster_open,
47 };
48 
49 struct keystore_module HAL_MODULE_INFO_SYM __attribute__((visibility("default"))) = {
50         .common =
51                 {
52                         .tag = HARDWARE_MODULE_TAG,
53                         .module_api_version = KEYMASTER_MODULE_API_VERSION_2_0,
54                         .hal_api_version = HARDWARE_HAL_API_VERSION,
55                         .id = KEYSTORE_HARDWARE_MODULE_ID,
56                         .name = "Trusty Keymaster HAL",
57                         .author = "The Android Open Source Project",
58                         .methods = &keystore_module_methods,
59                         .dso = 0,
60                         .reserved = {},
61                 },
62 };
63