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/*
* Copyright (c) 2016, Linaro Limited
* 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 <err.h>
#include <stdio.h>
#include <string.h>
/* OP-TEE TEE client API (built by optee_client) */
#include <tee_client_api.h>
/* To the the UUID (found the the TA's h-file(s)) */
#include <logger_ta.h>
int main(int argc, char *argv[])
{
TEEC_Result res;
TEEC_Context ctx;
TEEC_Session sess;
TEEC_Operation op;
TEEC_UUID uuid = TA_LOGGER_UUID;
uint32_t err_origin;
/* Initialize a context connecting us to the TEE */
res = TEEC_InitializeContext(NULL, &ctx);
if (res != TEEC_SUCCESS)
errx(1, "TEEC_InitializeContext failed with code 0x%x", res);
/*
* Open a session to the "hello world" TA, the TA will print "hello
* world!" in the log when the session is created.
*/
res = TEEC_OpenSession(&ctx, &sess, &uuid,
TEEC_LOGIN_PUBLIC, NULL, NULL, &err_origin);
if (res != TEEC_SUCCESS)
errx(1, "TEEC_Opensession failed with code 0x%x origin 0x%x",
res, err_origin);
/*
* Execute a function in the TA by invoking it, in this case
* we're incrementing a number.
*
* The value of command ID part and how the parameters are
* interpreted is part of the interface provided by the TA.
*/
/* Clear the TEEC_Operation struct */
memset(&op, 0, sizeof(op));
/*
* Prepare the argument. Pass a value in the first parameter,
* the remaining three parameters are unused.
*/
op.paramTypes = TEEC_PARAM_TYPES(TEEC_VALUE_INOUT, TEEC_NONE,
TEEC_NONE, TEEC_NONE);
op.params[0].value.a = 42;
printf("Invoking TA to increment %d\n", op.params[0].value.a);
res = TEEC_InvokeCommand(&sess, 1, &op,
&err_origin);
if (res != TEEC_SUCCESS)
errx(1, "TEEC_InvokeCommand failed with code 0x%x origin 0x%x",
res, err_origin);
printf("TA incremented value to %d\n", op.params[0].value.a);
/*
* We're done with the TA, close the session and
* destroy the context.
*
* The TA will print "Goodbye!" in the log when the
* session is closed.
*/
TEEC_CloseSession(&sess);
TEEC_FinalizeContext(&ctx);
return 0;
}
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