1 //
2 // Copyright (C) 2020 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 #pragma once
17 
18 #include <keymaster/android_keymaster_utils.h>
19 #include <tss2/tss2_esys.h>
20 
21 #include "host/commands/secure_env/tpm_auth.h"
22 
23 /**
24  * Encrypt `data_in` to `data_out`, which are both buffers of size `data_size`.
25  *
26  * There are no integrity guarantees on this data: if the encrypted data is
27  * corrupted, decrypting it could either fail or produce corrupted output.
28  */
29 bool TpmEncrypt(
30     ESYS_CONTEXT* esys,
31     ESYS_TR key_handle,
32     TpmAuth auth,
33     uint8_t* data_in,
34     uint8_t* data_out,
35     size_t data_size);
36 
37 
38 /**
39  * Decrypt `data_in` to `data_out`, which are both buffers of size `data_size`.
40  *
41  * There are no integrity guarantees on this data: if the encrypted data is
42  * corrupted, decrypting it could either fail or produce corrupted output.
43  */
44 bool TpmDecrypt(
45     ESYS_CONTEXT* esys,
46     ESYS_TR key_handle,
47     TpmAuth auth,
48     uint8_t* data_in,
49     uint8_t* data_out,
50     size_t data_size);
51