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      1 /*
      2  * Copyright (C) 2012 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 #define KEYMASTER_PORT "com.android.trusty.keymaster"
     20 #define KEYMASTER_MAX_BUFFER_LENGTH 4096
     21 
     22 // Commands
     23 enum keymaster_command {
     24 	KEYMASTER_RESP_BIT              = 1,
     25 	KEYMASTER_REQ_SHIFT             = 1,
     26 
     27     KM_GENERATE_KEY                 = (0 << KEYMASTER_REQ_SHIFT),
     28     KM_BEGIN_OPERATION              = (1 << KEYMASTER_REQ_SHIFT),
     29     KM_UPDATE_OPERATION             = (2 << KEYMASTER_REQ_SHIFT),
     30     KM_FINISH_OPERATION             = (3 << KEYMASTER_REQ_SHIFT),
     31     KM_ABORT_OPERATION              = (4 << KEYMASTER_REQ_SHIFT),
     32     KM_IMPORT_KEY                   = (5 << KEYMASTER_REQ_SHIFT),
     33     KM_EXPORT_KEY                   = (6 << KEYMASTER_REQ_SHIFT),
     34     KM_GET_VERSION                  = (7 << KEYMASTER_REQ_SHIFT),
     35     KM_ADD_RNG_ENTROPY              = (8 << KEYMASTER_REQ_SHIFT),
     36     KM_GET_SUPPORTED_ALGORITHMS     = (9 << KEYMASTER_REQ_SHIFT),
     37     KM_GET_SUPPORTED_BLOCK_MODES    = (10 << KEYMASTER_REQ_SHIFT),
     38     KM_GET_SUPPORTED_PADDING_MODES  = (11 << KEYMASTER_REQ_SHIFT),
     39     KM_GET_SUPPORTED_DIGESTS        = (12 << KEYMASTER_REQ_SHIFT),
     40     KM_GET_SUPPORTED_IMPORT_FORMATS = (13 << KEYMASTER_REQ_SHIFT),
     41     KM_GET_SUPPORTED_EXPORT_FORMATS = (14 << KEYMASTER_REQ_SHIFT),
     42     KM_GET_KEY_CHARACTERISTICS      = (15 << KEYMASTER_REQ_SHIFT),
     43 };
     44 
     45 #ifdef __ANDROID__
     46 
     47 /**
     48  * keymaster_message - Serial header for communicating with KM server
     49  * @cmd: the command, one of keymaster_command.
     50  * @payload: start of the serialized command specific payload
     51  */
     52 struct keymaster_message {
     53 	uint32_t cmd;
     54 	uint8_t payload[0];
     55 };
     56 
     57 #endif
     58