1 /*
2  * Copyright (C) 2021 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 
17 #pragma once
18 
19 #include <stdint.h>
20 
21 #ifdef __cplusplus
22 extern "C" {
23 #endif
24 
25 #define ACVP_PORT "com.android.trusty.acvp"
26 
27 /*
28  * Maximum number of arguments
29  */
30 #define ACVP_MAX_NUM_ARGUMENTS 9
31 
32 /*
33  * Maximum length of an algorithm name
34  */
35 #define ACVP_MAX_NAME_LENGTH 30
36 
37 /*
38  * Maximum length of an ACVP request message
39  */
40 #define ACVP_MAX_MESSAGE_LENGTH sizeof(struct acvp_req)
41 
42 /*
43  * Minimum length of the shared memory buffer
44  *
45  * This must be at least as long as the longest reply from the ACVP service
46  * (currently the reply from getConfig()).
47  */
48 #define ACVP_MIN_SHARED_MEMORY 32768
49 
50 /**
51  * acvp_req - Request for the Trusty ACVP app
52  * @num_args: Number of acvp_arg structures following this struct
53  * @buffer_size: Total size of shared memory buffer
54  * @lengths: Length of each argument in the shared memory buffer
55  *
56  * @num_args copies of the acvp_arg struct follow this structure.
57  */
58 struct acvp_req {
59     uint32_t num_args;
60     uint32_t buffer_size;
61     uint32_t lengths[ACVP_MAX_NUM_ARGUMENTS];
62 };
63 
64 /**
65  * acvp_resp - Response to a ACVP request
66  *
67  * @num_spans: Number of response sections
68  * @lengths: Length of each response section
69  */
70 struct acvp_resp {
71     uint32_t num_spans;
72     uint32_t lengths[ACVP_MAX_NUM_ARGUMENTS];
73 };
74 
75 #ifdef __cplusplus
76 }  // extern "C"
77 #endif
78