551 lines
21 KiB
C
551 lines
21 KiB
C
/*
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* Copyright (c) 2014, STMicroelectronics International N.V.
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* All rights reserved.
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* Copyright (c) 2015, Linaro Limited
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TEE_CLIENT_API_H
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#define TEE_CLIENT_API_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <limits.h>
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/*
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* Defines the number of available memory references in an open session or
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* invoke command operation payload.
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*/
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#define TEEC_CONFIG_PAYLOAD_REF_COUNT 4
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/**
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* Defines the maximum size of a single shared memory block, in bytes, of both
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* API allocated and API registered memory. There is no good value to put here
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* (limits depend on specific config used), so this define does not provide any
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* restriction in this implementation.
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*/
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#define TEEC_CONFIG_SHAREDMEM_MAX_SIZE ULONG_MAX
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/**
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* Flag constants indicating the type of parameters encoded inside the
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* operation payload (TEEC_Operation), Type is uint32_t.
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*
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* TEEC_NONE The Parameter is not used
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*
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* TEEC_VALUE_INPUT The Parameter is a TEEC_Value tagged as input.
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*
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* TEEC_VALUE_OUTPUT The Parameter is a TEEC_Value tagged as output.
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*
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* TEEC_VALUE_INOUT The Parameter is a TEEC_Value tagged as both as
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* input and output, i.e., for which both the
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* behaviors of TEEC_VALUE_INPUT and
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* TEEC_VALUE_OUTPUT apply.
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*
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* TEEC_MEMREF_TEMP_INPUT The Parameter is a TEEC_TempMemoryReference
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* describing a region of memory which needs to be
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* temporarily registered for the duration of the
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* Operation and is tagged as input.
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*
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* TEEC_MEMREF_TEMP_OUTPUT Same as TEEC_MEMREF_TEMP_INPUT, but the Memory
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* Reference is tagged as output. The
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* Implementation may update the size field to
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* reflect the required output size in some use
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* cases.
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*
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* TEEC_MEMREF_TEMP_INOUT A Temporary Memory Reference tagged as both
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* input and output, i.e., for which both the
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* behaviors of TEEC_MEMREF_TEMP_INPUT and
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* TEEC_MEMREF_TEMP_OUTPUT apply.
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*
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* TEEC_MEMREF_WHOLE The Parameter is a Registered Memory Reference
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* that refers to the entirety of its parent Shared
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* Memory block. The parameter structure is a
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* TEEC_MemoryReference. In this structure, the
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* Implementation MUST read only the parent field
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* and MAY update the size field when the operation
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* completes.
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*
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* TEEC_MEMREF_PARTIAL_INPUT A Registered Memory Reference structure that
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* refers to a partial region of its parent Shared
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* Memory block and is tagged as input.
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*
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* TEEC_MEMREF_PARTIAL_OUTPUT Registered Memory Reference structure that
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* refers to a partial region of its parent Shared
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* Memory block and is tagged as output.
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*
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* TEEC_MEMREF_PARTIAL_INOUT The Registered Memory Reference structure that
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* refers to a partial region of its parent Shared
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* Memory block and is tagged as both input and
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* output, i.e., for which both the behaviors of
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* TEEC_MEMREF_PARTIAL_INPUT and
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* TEEC_MEMREF_PARTIAL_OUTPUT apply.
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*/
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#define TEEC_NONE 0x00000000
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#define TEEC_VALUE_INPUT 0x00000001
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#define TEEC_VALUE_OUTPUT 0x00000002
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#define TEEC_VALUE_INOUT 0x00000003
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#define TEEC_MEMREF_TEMP_INPUT 0x00000005
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#define TEEC_MEMREF_TEMP_OUTPUT 0x00000006
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#define TEEC_MEMREF_TEMP_INOUT 0x00000007
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#define TEEC_MEMREF_WHOLE 0x0000000C
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#define TEEC_MEMREF_PARTIAL_INPUT 0x0000000D
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#define TEEC_MEMREF_PARTIAL_OUTPUT 0x0000000E
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#define TEEC_MEMREF_PARTIAL_INOUT 0x0000000F
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/**
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* Flag constants indicating the data transfer direction of memory in
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* TEEC_Parameter. TEEC_MEM_INPUT signifies data transfer direction from the
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* client application to the TEE. TEEC_MEM_OUTPUT signifies data transfer
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* direction from the TEE to the client application. Type is uint32_t.
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*
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* TEEC_MEM_INPUT The Shared Memory can carry data from the client
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* application to the Trusted Application.
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* TEEC_MEM_OUTPUT The Shared Memory can carry data from the Trusted
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* Application to the client application.
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*/
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#define TEEC_MEM_INPUT 0x00000001
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#define TEEC_MEM_OUTPUT 0x00000002
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/**
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* Return values. Type is TEEC_Result
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*
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* TEEC_SUCCESS The operation was successful.
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* TEEC_ERROR_GENERIC Non-specific cause.
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* TEEC_ERROR_ACCESS_DENIED Access privileges are not sufficient.
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* TEEC_ERROR_CANCEL The operation was canceled.
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* TEEC_ERROR_ACCESS_CONFLICT Concurrent accesses caused conflict.
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* TEEC_ERROR_EXCESS_DATA Too much data for the requested operation was
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* passed.
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* TEEC_ERROR_BAD_FORMAT Input data was of invalid format.
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* TEEC_ERROR_BAD_PARAMETERS Input parameters were invalid.
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* TEEC_ERROR_BAD_STATE Operation is not valid in the current state.
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* TEEC_ERROR_ITEM_NOT_FOUND The requested data item is not found.
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* TEEC_ERROR_NOT_IMPLEMENTED The requested operation should exist but is not
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* yet implemented.
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* TEEC_ERROR_NOT_SUPPORTED The requested operation is valid but is not
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* supported in this implementation.
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* TEEC_ERROR_NO_DATA Expected data was missing.
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* TEEC_ERROR_OUT_OF_MEMORY System ran out of resources.
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* TEEC_ERROR_BUSY The system is busy working on something else.
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* TEEC_ERROR_COMMUNICATION Communication with a remote party failed.
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* TEEC_ERROR_SECURITY A security fault was detected.
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* TEEC_ERROR_SHORT_BUFFER The supplied buffer is too short for the
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* generated output.
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* TEEC_ERROR_TARGET_DEAD Trusted Application has panicked
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* during the operation.
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*/
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/**
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* Standard defined error codes.
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*/
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#define TEEC_SUCCESS 0x00000000
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#define TEEC_ERROR_STORAGE_NOT_AVAILABLE 0xF0100003
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#define TEEC_ERROR_GENERIC 0xFFFF0000
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#define TEEC_ERROR_ACCESS_DENIED 0xFFFF0001
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#define TEEC_ERROR_CANCEL 0xFFFF0002
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#define TEEC_ERROR_ACCESS_CONFLICT 0xFFFF0003
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#define TEEC_ERROR_EXCESS_DATA 0xFFFF0004
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#define TEEC_ERROR_BAD_FORMAT 0xFFFF0005
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#define TEEC_ERROR_BAD_PARAMETERS 0xFFFF0006
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#define TEEC_ERROR_BAD_STATE 0xFFFF0007
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#define TEEC_ERROR_ITEM_NOT_FOUND 0xFFFF0008
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#define TEEC_ERROR_NOT_IMPLEMENTED 0xFFFF0009
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#define TEEC_ERROR_NOT_SUPPORTED 0xFFFF000A
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#define TEEC_ERROR_NO_DATA 0xFFFF000B
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#define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C
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#define TEEC_ERROR_BUSY 0xFFFF000D
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#define TEEC_ERROR_COMMUNICATION 0xFFFF000E
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#define TEEC_ERROR_SECURITY 0xFFFF000F
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#define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010
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#define TEEC_ERROR_EXTERNAL_CANCEL 0xFFFF0011
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#define TEEC_ERROR_TARGET_DEAD 0xFFFF3024
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/**
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* Function error origins, of type TEEC_ErrorOrigin. These indicate where in
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* the software stack a particular return value originates from.
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*
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* TEEC_ORIGIN_API The error originated within the TEE Client API
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* implementation.
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* TEEC_ORIGIN_COMMS The error originated within the underlying
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* communications stack linking the rich OS with
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* the TEE.
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* TEEC_ORIGIN_TEE The error originated within the common TEE code.
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* TEEC_ORIGIN_TRUSTED_APP The error originated within the Trusted Application
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* code.
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*/
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#define TEEC_ORIGIN_API 0x00000001
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#define TEEC_ORIGIN_COMMS 0x00000002
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#define TEEC_ORIGIN_TEE 0x00000003
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#define TEEC_ORIGIN_TRUSTED_APP 0x00000004
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/**
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* Session login methods, for use in TEEC_OpenSession() as parameter
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* connectionMethod. Type is uint32_t.
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*
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* TEEC_LOGIN_PUBLIC No login data is provided.
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* TEEC_LOGIN_USER Login data about the user running the Client
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* Application process is provided.
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* TEEC_LOGIN_GROUP Login data about the group running the Client
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* Application process is provided.
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* TEEC_LOGIN_APPLICATION Login data about the running Client Application
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* itself is provided.
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* TEEC_LOGIN_USER_APPLICATION Login data about the user and the running
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* Client Application itself is provided.
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* TEEC_LOGIN_GROUP_APPLICATION Login data about the group and the running
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* Client Application itself is provided.
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*/
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#define TEEC_LOGIN_PUBLIC 0x00000000
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#define TEEC_LOGIN_USER 0x00000001
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#define TEEC_LOGIN_GROUP 0x00000002
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#define TEEC_LOGIN_APPLICATION 0x00000004
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#define TEEC_LOGIN_USER_APPLICATION 0x00000005
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#define TEEC_LOGIN_GROUP_APPLICATION 0x00000006
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/**
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* Encode the paramTypes according to the supplied types.
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*
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* @param p0 The first param type.
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* @param p1 The second param type.
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* @param p2 The third param type.
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* @param p3 The fourth param type.
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*/
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#define TEEC_PARAM_TYPES(p0, p1, p2, p3) \
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((p0) | ((p1) << 4) | ((p2) << 8) | ((p3) << 12))
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/**
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* Get the i_th param type from the paramType.
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*
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* @param p The paramType.
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* @param i The i-th parameter to get the type for.
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*/
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#define TEEC_PARAM_TYPE_GET(p, i) (((p) >> (i * 4)) & 0xF)
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typedef uint32_t TEEC_Result;
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/**
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* struct TEEC_Context - Represents a connection between a client application
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* and a TEE.
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*/
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typedef struct {
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/* Implementation defined */
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int fd;
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bool reg_mem;
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} TEEC_Context;
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/**
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* This type contains a Universally Unique Resource Identifier (UUID) type as
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* defined in RFC4122. These UUID values are used to identify Trusted
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* Applications.
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*/
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typedef struct {
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uint32_t timeLow;
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uint16_t timeMid;
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uint16_t timeHiAndVersion;
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uint8_t clockSeqAndNode[8];
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} TEEC_UUID;
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/**
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* struct TEEC_SharedMemory - Memory to transfer data between a client
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* application and trusted code.
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*
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* @param buffer The memory buffer which is to be, or has been, shared
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* with the TEE.
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* @param size The size, in bytes, of the memory buffer.
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* @param flags Bit-vector which holds properties of buffer.
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* The bit-vector can contain either or both of the
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* TEEC_MEM_INPUT and TEEC_MEM_OUTPUT flags.
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*
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* A shared memory block is a region of memory allocated in the context of the
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* client application memory space that can be used to transfer data between
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* that client application and a trusted application. The user of this struct
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* is responsible to populate the buffer pointer.
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*/
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typedef struct {
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void *buffer;
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size_t size;
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uint32_t flags;
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/*
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* Implementation-Defined
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*/
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int id;
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size_t alloced_size;
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void *shadow_buffer;
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int registered_fd;
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bool buffer_allocated;
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} TEEC_SharedMemory;
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/**
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* struct TEEC_TempMemoryReference - Temporary memory to transfer data between
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* a client application and trusted code, only used for the duration of the
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* operation.
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*
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* @param buffer The memory buffer which is to be, or has been shared with
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* the TEE.
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* @param size The size, in bytes, of the memory buffer.
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*
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* A memory buffer that is registered temporarily for the duration of the
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* operation to be called.
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*/
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typedef struct {
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void *buffer;
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size_t size;
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} TEEC_TempMemoryReference;
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/**
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* struct TEEC_RegisteredMemoryReference - use a pre-registered or
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* pre-allocated shared memory block of memory to transfer data between
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* a client application and trusted code.
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*
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* @param parent Points to a shared memory structure. The memory reference
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* may utilize the whole shared memory or only a part of it.
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* Must not be NULL
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*
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* @param size The size, in bytes, of the memory buffer.
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*
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* @param offset The offset, in bytes, of the referenced memory region from
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* the start of the shared memory block.
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*
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*/
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typedef struct {
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TEEC_SharedMemory *parent;
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size_t size;
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size_t offset;
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} TEEC_RegisteredMemoryReference;
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/**
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* struct TEEC_Value - Small raw data container
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*
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* Instead of allocating a shared memory buffer this structure can be used
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* to pass small raw data between a client application and trusted code.
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*
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* @param a The first integer value.
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*
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* @param b The second value.
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*/
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typedef struct {
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uint32_t a;
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uint32_t b;
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} TEEC_Value;
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/**
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* union TEEC_Parameter - Memory container to be used when passing data between
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* client application and trusted code.
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*
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* Either the client uses a shared memory reference, parts of it or a small raw
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* data container.
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*
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* @param tmpref A temporary memory reference only valid for the duration
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* of the operation.
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*
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* @param memref The entire shared memory or parts of it.
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*
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* @param value The small raw data container to use
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*/
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typedef union {
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TEEC_TempMemoryReference tmpref;
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TEEC_RegisteredMemoryReference memref;
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TEEC_Value value;
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} TEEC_Parameter;
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/**
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* struct TEEC_Session - Represents a connection between a client application
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* and a trusted application.
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*/
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typedef struct {
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/* Implementation defined */
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TEEC_Context *ctx;
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uint32_t session_id;
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} TEEC_Session;
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/**
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* struct TEEC_Operation - Holds information and memory references used in
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* TEEC_InvokeCommand().
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*
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* @param started Client must initialize to zero if it needs to cancel
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* an operation about to be performed.
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* @param paramTypes Type of data passed. Use TEEC_PARAMS_TYPE macro to
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* create the correct flags.
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* 0 means TEEC_NONE is passed for all params.
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* @param params Array of parameters of type TEEC_Parameter.
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* @param session Internal pointer to the last session used by
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* TEEC_InvokeCommand with this operation.
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*
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*/
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typedef struct {
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uint32_t started;
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uint32_t paramTypes;
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TEEC_Parameter params[TEEC_CONFIG_PAYLOAD_REF_COUNT];
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/* Implementation-Defined */
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TEEC_Session *session;
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} TEEC_Operation;
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/**
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* TEEC_InitializeContext() - Initializes a context holding connection
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* information on the specific TEE, designated by the name string.
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* @param name A zero-terminated string identifying the TEE to connect to.
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* If name is set to NULL, the default TEE is connected to. NULL
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* is the only supported value in this version of the API
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* implementation.
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*
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* @param context The context structure which is to be initialized.
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*
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* @return TEEC_SUCCESS The initialization was successful.
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* @return TEEC_Result Something failed.
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*/
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TEEC_Result TEEC_InitializeContext(const char *name, TEEC_Context *context);
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/**
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* TEEC_FinalizeContext() - Destroys a context holding connection information
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* on the specific TEE.
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*
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* This function destroys an initialized TEE context, closing the connection
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* between the client application and the TEE. This function must only be
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* called when all sessions related to this TEE context have been closed and
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* all shared memory blocks have been released.
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*
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* @param context The context to be destroyed.
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*/
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void TEEC_FinalizeContext(TEEC_Context *context);
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/**
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* TEEC_OpenSession() - Opens a new session with the specified trusted
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* application.
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*
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* @param context The initialized TEE context structure in which
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* scope to open the session.
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* @param session The session to initialize.
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* @param destination A structure identifying the trusted application
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* with which to open a session.
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*
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* @param connectionMethod The connection method to use.
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* @param connectionData Any data necessary to connect with the chosen
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* connection method. Not supported, should be set to
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* NULL.
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* @param operation An operation structure to use in the session. May
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* be set to NULL to signify no operation structure
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* needed.
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*
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* @param returnOrigin A parameter which will hold the error origin if
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* this function returns any value other than
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* TEEC_SUCCESS.
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*
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* @return TEEC_SUCCESS OpenSession successfully opened a new session.
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* @return TEEC_Result Something failed.
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*
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*/
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TEEC_Result TEEC_OpenSession(TEEC_Context *context,
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TEEC_Session *session,
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const TEEC_UUID *destination,
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uint32_t connectionMethod,
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const void *connectionData,
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TEEC_Operation *operation,
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uint32_t *returnOrigin);
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/**
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* TEEC_CloseSession() - Closes the session which has been opened with the
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* specific trusted application.
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*
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* @param session The opened session to close.
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*/
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void TEEC_CloseSession(TEEC_Session *session);
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/**
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* TEEC_InvokeCommand() - Executes a command in the specified trusted
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* application.
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*
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* @param session A handle to an open connection to the trusted
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* application.
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* @param commandID Identifier of the command in the trusted application
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* to invoke.
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* @param operation An operation structure to use in the invoke command.
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* May be set to NULL to signify no operation structure
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* needed.
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* @param returnOrigin A parameter which will hold the error origin if this
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* function returns any value other than TEEC_SUCCESS.
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*
|
|
* @return TEEC_SUCCESS OpenSession successfully opened a new session.
|
|
* @return TEEC_Result Something failed.
|
|
*/
|
|
TEEC_Result TEEC_InvokeCommand(TEEC_Session *session,
|
|
uint32_t commandID,
|
|
TEEC_Operation *operation,
|
|
uint32_t *returnOrigin);
|
|
|
|
/**
|
|
* TEEC_RegisterSharedMemory() - Register a block of existing memory as a
|
|
* shared block within the scope of the specified context.
|
|
*
|
|
* @param context The initialized TEE context structure in which scope to
|
|
* open the session.
|
|
* @param sharedMem pointer to the shared memory structure to register.
|
|
*
|
|
* @return TEEC_SUCCESS The registration was successful.
|
|
* @return TEEC_ERROR_OUT_OF_MEMORY Memory exhaustion.
|
|
* @return TEEC_Result Something failed.
|
|
*/
|
|
TEEC_Result TEEC_RegisterSharedMemory(TEEC_Context *context,
|
|
TEEC_SharedMemory *sharedMem);
|
|
|
|
/**
|
|
* TEEC_AllocateSharedMemory() - Allocate shared memory for TEE.
|
|
*
|
|
* @param context The initialized TEE context structure in which scope to
|
|
* open the session.
|
|
* @param sharedMem Pointer to the allocated shared memory.
|
|
*
|
|
* @return TEEC_SUCCESS The registration was successful.
|
|
* @return TEEC_ERROR_OUT_OF_MEMORY Memory exhaustion.
|
|
* @return TEEC_Result Something failed.
|
|
*/
|
|
TEEC_Result TEEC_AllocateSharedMemory(TEEC_Context *context,
|
|
TEEC_SharedMemory *sharedMem);
|
|
|
|
/**
|
|
* TEEC_ReleaseSharedMemory() - Free or deregister the shared memory.
|
|
*
|
|
* @param sharedMem Pointer to the shared memory to be freed.
|
|
*/
|
|
void TEEC_ReleaseSharedMemory(TEEC_SharedMemory *sharedMemory);
|
|
|
|
/**
|
|
* TEEC_RequestCancellation() - Request the cancellation of a pending open
|
|
* session or command invocation.
|
|
*
|
|
* @param operation Pointer to an operation previously passed to open session
|
|
* or invoke.
|
|
*/
|
|
void TEEC_RequestCancellation(TEEC_Operation *operation);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|