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tee_api.c
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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2014, STMicroelectronics International N.V.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <string.h>
#include <tee_api.h>
#include <utee_syscalls.h>
#include <user_ta_header.h>
#include "tee_user_mem.h"
//#include "tee_api_private.h"
#include "utee_types.h"
static const void *tee_api_instance_data;
/* System API - Internal Client API */
void __utee_from_param(struct utee_params *up, uint32_t param_types,
const TEE_Param params[TEE_NUM_PARAMS])
{
size_t n;
up->types = param_types;
for (n = 0; n < TEE_NUM_PARAMS; n++) {
switch (TEE_PARAM_TYPE_GET(param_types, n)) {
case TEE_PARAM_TYPE_VALUE_INPUT:
case TEE_PARAM_TYPE_VALUE_OUTPUT:
case TEE_PARAM_TYPE_VALUE_INOUT:
up->vals[n * 2] = params[n].value.a;
up->vals[n * 2 + 1] = params[n].value.b;
break;
case TEE_PARAM_TYPE_MEMREF_INPUT:
case TEE_PARAM_TYPE_MEMREF_OUTPUT:
case TEE_PARAM_TYPE_MEMREF_INOUT:
up->vals[n * 2] = (uintptr_t)params[n].memref.buffer;
up->vals[n * 2 + 1] = params[n].memref.size;
break;
default:
up->vals[n * 2] = 0;
up->vals[n * 2 + 1] = 0;
break;
}
}
}
void __utee_to_param(TEE_Param params[TEE_NUM_PARAMS],
uint32_t *param_types, const struct utee_params *up)
{
size_t n;
uint32_t types = up->types;
for (n = 0; n < TEE_NUM_PARAMS; n++) {
uintptr_t a = up->vals[n * 2];
uintptr_t b = up->vals[n * 2 + 1];
switch (TEE_PARAM_TYPE_GET(types, n)) {
case TEE_PARAM_TYPE_VALUE_INPUT:
case TEE_PARAM_TYPE_VALUE_OUTPUT:
case TEE_PARAM_TYPE_VALUE_INOUT:
params[n].value.a = a;
params[n].value.b = b;
break;
case TEE_PARAM_TYPE_MEMREF_INPUT:
case TEE_PARAM_TYPE_MEMREF_OUTPUT:
case TEE_PARAM_TYPE_MEMREF_INOUT:
params[n].memref.buffer = (void *)a;
params[n].memref.size = b;
break;
default:
break;
}
}
if (param_types)
*param_types = types;
}
TEE_Result TEE_OpenTASession(const TEE_UUID *destination,
uint32_t cancellationRequestTimeout,
uint32_t paramTypes,
TEE_Param params[TEE_NUM_PARAMS],
TEE_TASessionHandle *session,
uint32_t *returnOrigin)
{
TEE_Result res;
struct utee_params up;
uint32_t s;
__utee_from_param(&up, paramTypes, params);
res = utee_open_ta_session(destination, cancellationRequestTimeout,
&up, &s, returnOrigin);
__utee_to_param(params, NULL, &up);
/*
* Specification says that *session must hold TEE_HANDLE_NULL is
* TEE_SUCCESS isn't returned. Set it here explicitly in case
* the syscall fails before out parameters has been updated.
*/
if (res != TEE_SUCCESS)
s = TEE_HANDLE_NULL;
*session = (TEE_TASessionHandle)(uintptr_t)s;
return res;
}
void TEE_CloseTASession(TEE_TASessionHandle session)
{
if (session != TEE_HANDLE_NULL) {
TEE_Result res = utee_close_ta_session((uintptr_t)session);
if (res != TEE_SUCCESS)
TEE_Panic(res);
}
}
TEE_Result TEE_InvokeTACommand(TEE_TASessionHandle session,
uint32_t cancellationRequestTimeout,
uint32_t commandID, uint32_t paramTypes,
TEE_Param params[TEE_NUM_PARAMS],
uint32_t *returnOrigin)
{
TEE_Result res;
uint32_t ret_origin;
struct utee_params up;
__utee_from_param(&up, paramTypes, params);
res = utee_invoke_ta_command((uintptr_t)session,
cancellationRequestTimeout,
commandID, &up, &ret_origin);
__utee_to_param(params, NULL, &up);
if (returnOrigin != NULL)
*returnOrigin = ret_origin;
if (ret_origin == TEE_ORIGIN_TRUSTED_APP)
return res;
if (res != TEE_SUCCESS &&
res != TEE_ERROR_OUT_OF_MEMORY &&
res != TEE_ERROR_TARGET_DEAD)
TEE_Panic(res);
return res;
}
/* System API - Cancellations */
bool TEE_GetCancellationFlag(void)
{
uint32_t c;
TEE_Result res = utee_get_cancellation_flag(&c);
if (res != TEE_SUCCESS)
c = 0;
return !!c;
}
bool TEE_UnmaskCancellation(void)
{
uint32_t old_mask;
TEE_Result res = utee_unmask_cancellation(&old_mask);
if (res != TEE_SUCCESS)
TEE_Panic(res);
return !!old_mask;
}
bool TEE_MaskCancellation(void)
{
uint32_t old_mask;
TEE_Result res = utee_mask_cancellation(&old_mask);
if (res != TEE_SUCCESS)
TEE_Panic(res);
return !!old_mask;
}
/* System API - Memory Management */
TEE_Result TEE_CheckMemoryAccessRights(uint32_t accessFlags, void *buffer,
uint32_t size)
{
TEE_Result res;
if (size == 0)
return TEE_SUCCESS;
/* Check access rights against memory mapping */
res = utee_check_access_rights(accessFlags, buffer, size);
if (res != TEE_SUCCESS)
goto out;
/*
* Check access rights against input parameters
* Previous legacy code was removed and will need to be restored
*/
res = TEE_SUCCESS;
out:
return res;
}
void TEE_SetInstanceData(const void *instanceData)
{
tee_api_instance_data = instanceData;
}
const void *TEE_GetInstanceData(void)
{
return tee_api_instance_data;
}
void *TEE_MemMove(void *dest, const void *src, uint32_t size)
{
return memmove(dest, src, size);
}
int32_t TEE_MemCompare(const void *buffer1, const void *buffer2, uint32_t size)
{
return memcmp(buffer1, buffer2, size);
}
void *TEE_MemFill(void *buff, uint32_t x, uint32_t size)
{
return memset(buff, x, size);
}
/* Date & Time API */
void TEE_GetSystemTime(TEE_Time *time)
{
TEE_Result res = utee_get_time(UTEE_TIME_CAT_SYSTEM, time);
if (res != TEE_SUCCESS)
TEE_Panic(res);
}
TEE_Result TEE_Wait(uint32_t timeout)
{
TEE_Result res = utee_wait(timeout);
if (res != TEE_SUCCESS && res != TEE_ERROR_CANCEL)
TEE_Panic(res);
return res;
}
TEE_Result TEE_GetTAPersistentTime(TEE_Time *time)
{
TEE_Result res;
res = utee_get_time(UTEE_TIME_CAT_TA_PERSISTENT, time);
if (res != TEE_SUCCESS && res != TEE_ERROR_OVERFLOW) {
time->seconds = 0;
time->millis = 0;
}
if (res != TEE_SUCCESS &&
res != TEE_ERROR_TIME_NOT_SET &&
res != TEE_ERROR_TIME_NEEDS_RESET &&
res != TEE_ERROR_OVERFLOW &&
res != TEE_ERROR_OUT_OF_MEMORY)
TEE_Panic(res);
return res;
}
TEE_Result TEE_SetTAPersistentTime(const TEE_Time *time)
{
TEE_Result res;
res = utee_set_ta_time(time);
if (res != TEE_SUCCESS &&
res != TEE_ERROR_OUT_OF_MEMORY &&
res != TEE_ERROR_STORAGE_NO_SPACE)
TEE_Panic(res);
return res;
}
void TEE_GetREETime(TEE_Time *time)
{
TEE_Result res = utee_get_time(UTEE_TIME_CAT_REE, time);
if (res != TEE_SUCCESS)
TEE_Panic(res);
}
void *TEE_Malloc(uint32_t len, uint32_t hint)
{
return tee_user_mem_alloc(len, hint);
}
void *TEE_Realloc(const void *buffer, uint32_t newSize)
{
/*
* GP TEE Internal API specifies newSize as 'uint32_t'.
* use unsigned 'size_t' type. it is at least 32bit!
*/
return tee_user_mem_realloc((void *)buffer, (size_t) newSize);
}
void TEE_Free(void *buffer)
{
tee_user_mem_free(buffer);
}
/* Cache maintenance support (TA requires the CACHE_MAINTENANCE property) */
TEE_Result TEE_CacheClean(char *buf, size_t len)
{
return utee_cache_operation(buf, len, TEE_CACHECLEAN);
}
TEE_Result TEE_CacheFlush(char *buf, size_t len)
{
return utee_cache_operation(buf, len, TEE_CACHEFLUSH);
}
TEE_Result TEE_CacheInvalidate(char *buf, size_t len)
{
return utee_cache_operation(buf, len, TEE_CACHEINVALIDATE);
}