xref: /aosp_15_r20/hardware/interfaces/keymaster/3.0/default/KeymasterDevice.cpp (revision 4d7e907c777eeecc4c5bd7cf640a754fac206ff7)
1*4d7e907cSAndroid Build Coastguard Worker /*
2*4d7e907cSAndroid Build Coastguard Worker  **
3*4d7e907cSAndroid Build Coastguard Worker  ** Copyright 2016, The Android Open Source Project
4*4d7e907cSAndroid Build Coastguard Worker  **
5*4d7e907cSAndroid Build Coastguard Worker  ** Licensed under the Apache License, Version 2.0 (the "License");
6*4d7e907cSAndroid Build Coastguard Worker  ** you may not use this file except in compliance with the License.
7*4d7e907cSAndroid Build Coastguard Worker  ** You may obtain a copy of the License at
8*4d7e907cSAndroid Build Coastguard Worker  **
9*4d7e907cSAndroid Build Coastguard Worker  **     http://www.apache.org/licenses/LICENSE-2.0
10*4d7e907cSAndroid Build Coastguard Worker  **
11*4d7e907cSAndroid Build Coastguard Worker  ** Unless required by applicable law or agreed to in writing, software
12*4d7e907cSAndroid Build Coastguard Worker  ** distributed under the License is distributed on an "AS IS" BASIS,
13*4d7e907cSAndroid Build Coastguard Worker  ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14*4d7e907cSAndroid Build Coastguard Worker  ** See the License for the specific language governing permissions and
15*4d7e907cSAndroid Build Coastguard Worker  ** limitations under the License.
16*4d7e907cSAndroid Build Coastguard Worker  */
17*4d7e907cSAndroid Build Coastguard Worker 
18*4d7e907cSAndroid Build Coastguard Worker #define LOG_TAG "[email protected]"
19*4d7e907cSAndroid Build Coastguard Worker 
20*4d7e907cSAndroid Build Coastguard Worker #include "KeymasterDevice.h"
21*4d7e907cSAndroid Build Coastguard Worker 
22*4d7e907cSAndroid Build Coastguard Worker #include <log/log.h>
23*4d7e907cSAndroid Build Coastguard Worker 
24*4d7e907cSAndroid Build Coastguard Worker #include <AndroidKeymaster3Device.h>
25*4d7e907cSAndroid Build Coastguard Worker #include <hardware/keymaster1.h>
26*4d7e907cSAndroid Build Coastguard Worker #include <hardware/keymaster2.h>
27*4d7e907cSAndroid Build Coastguard Worker #include <hardware/keymaster_defs.h>
28*4d7e907cSAndroid Build Coastguard Worker 
29*4d7e907cSAndroid Build Coastguard Worker namespace android {
30*4d7e907cSAndroid Build Coastguard Worker namespace hardware {
31*4d7e907cSAndroid Build Coastguard Worker namespace keymaster {
32*4d7e907cSAndroid Build Coastguard Worker namespace V3_0 {
33*4d7e907cSAndroid Build Coastguard Worker namespace implementation {
34*4d7e907cSAndroid Build Coastguard Worker 
get_keymaster1_dev(keymaster1_device_t ** dev,const hw_module_t * mod)35*4d7e907cSAndroid Build Coastguard Worker static int get_keymaster1_dev(keymaster1_device_t** dev, const hw_module_t* mod) {
36*4d7e907cSAndroid Build Coastguard Worker     int rc = keymaster1_open(mod, dev);
37*4d7e907cSAndroid Build Coastguard Worker     if (rc) {
38*4d7e907cSAndroid Build Coastguard Worker         ALOGE("Error %d opening keystore keymaster1 device", rc);
39*4d7e907cSAndroid Build Coastguard Worker         if (*dev) {
40*4d7e907cSAndroid Build Coastguard Worker             (*dev)->common.close(&(*dev)->common);
41*4d7e907cSAndroid Build Coastguard Worker             *dev = nullptr;
42*4d7e907cSAndroid Build Coastguard Worker         }
43*4d7e907cSAndroid Build Coastguard Worker     }
44*4d7e907cSAndroid Build Coastguard Worker     return rc;
45*4d7e907cSAndroid Build Coastguard Worker }
46*4d7e907cSAndroid Build Coastguard Worker 
get_keymaster2_dev(keymaster2_device_t ** dev,const hw_module_t * mod)47*4d7e907cSAndroid Build Coastguard Worker static int get_keymaster2_dev(keymaster2_device_t** dev, const hw_module_t* mod) {
48*4d7e907cSAndroid Build Coastguard Worker     int rc = keymaster2_open(mod, dev);
49*4d7e907cSAndroid Build Coastguard Worker     if (rc) {
50*4d7e907cSAndroid Build Coastguard Worker         ALOGE("Error %d opening keystore keymaster2 device", rc);
51*4d7e907cSAndroid Build Coastguard Worker         *dev = nullptr;
52*4d7e907cSAndroid Build Coastguard Worker     }
53*4d7e907cSAndroid Build Coastguard Worker     return rc;
54*4d7e907cSAndroid Build Coastguard Worker }
55*4d7e907cSAndroid Build Coastguard Worker 
createKeymaster3Device()56*4d7e907cSAndroid Build Coastguard Worker static IKeymasterDevice* createKeymaster3Device() {
57*4d7e907cSAndroid Build Coastguard Worker     const hw_module_t* mod = nullptr;
58*4d7e907cSAndroid Build Coastguard Worker 
59*4d7e907cSAndroid Build Coastguard Worker     int rc = hw_get_module_by_class(KEYSTORE_HARDWARE_MODULE_ID, NULL, &mod);
60*4d7e907cSAndroid Build Coastguard Worker     if (rc) {
61*4d7e907cSAndroid Build Coastguard Worker         ALOGI("Could not find any keystore module, using software-only implementation.");
62*4d7e907cSAndroid Build Coastguard Worker         // SoftKeymasterDevice will be deleted by keymaster_device_release()
63*4d7e907cSAndroid Build Coastguard Worker         return ::keymaster::ng::CreateKeymasterDevice();
64*4d7e907cSAndroid Build Coastguard Worker     }
65*4d7e907cSAndroid Build Coastguard Worker 
66*4d7e907cSAndroid Build Coastguard Worker     if (mod->module_api_version < KEYMASTER_MODULE_API_VERSION_1_0) {
67*4d7e907cSAndroid Build Coastguard Worker         return nullptr;
68*4d7e907cSAndroid Build Coastguard Worker     } else if (mod->module_api_version == KEYMASTER_MODULE_API_VERSION_1_0) {
69*4d7e907cSAndroid Build Coastguard Worker         keymaster1_device_t* dev = nullptr;
70*4d7e907cSAndroid Build Coastguard Worker         if (get_keymaster1_dev(&dev, mod)) {
71*4d7e907cSAndroid Build Coastguard Worker             return nullptr;
72*4d7e907cSAndroid Build Coastguard Worker         }
73*4d7e907cSAndroid Build Coastguard Worker         return ::keymaster::ng::CreateKeymasterDevice(dev);
74*4d7e907cSAndroid Build Coastguard Worker     } else {
75*4d7e907cSAndroid Build Coastguard Worker         keymaster2_device_t* dev = nullptr;
76*4d7e907cSAndroid Build Coastguard Worker         if (get_keymaster2_dev(&dev, mod)) {
77*4d7e907cSAndroid Build Coastguard Worker             return nullptr;
78*4d7e907cSAndroid Build Coastguard Worker         }
79*4d7e907cSAndroid Build Coastguard Worker         return ::keymaster::ng::CreateKeymasterDevice(dev);
80*4d7e907cSAndroid Build Coastguard Worker     }
81*4d7e907cSAndroid Build Coastguard Worker }
82*4d7e907cSAndroid Build Coastguard Worker 
HIDL_FETCH_IKeymasterDevice(const char * name)83*4d7e907cSAndroid Build Coastguard Worker IKeymasterDevice* HIDL_FETCH_IKeymasterDevice(const char* name) {
84*4d7e907cSAndroid Build Coastguard Worker     ALOGI("Fetching keymaster device name %s", name);
85*4d7e907cSAndroid Build Coastguard Worker 
86*4d7e907cSAndroid Build Coastguard Worker     if (name && strcmp(name, "softwareonly") == 0) {
87*4d7e907cSAndroid Build Coastguard Worker         return ::keymaster::ng::CreateKeymasterDevice();
88*4d7e907cSAndroid Build Coastguard Worker     } else if (name && strcmp(name, "default") == 0) {
89*4d7e907cSAndroid Build Coastguard Worker         return createKeymaster3Device();
90*4d7e907cSAndroid Build Coastguard Worker     }
91*4d7e907cSAndroid Build Coastguard Worker     return nullptr;
92*4d7e907cSAndroid Build Coastguard Worker }
93*4d7e907cSAndroid Build Coastguard Worker 
94*4d7e907cSAndroid Build Coastguard Worker }  // namespace implementation
95*4d7e907cSAndroid Build Coastguard Worker }  // namespace V3_0
96*4d7e907cSAndroid Build Coastguard Worker }  // namespace keymaster
97*4d7e907cSAndroid Build Coastguard Worker }  // namespace hardware
98*4d7e907cSAndroid Build Coastguard Worker }  // namespace android
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