/* * 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 #include #include /* OP-TEE TEE client API (built by optee_client) */ #include /* For the UUID (found in the TA's h-file(s)) */ #include int main(void) { TEEC_Result res; TEEC_Context ctx; TEEC_Session sess; TEEC_Operation op; TEEC_UUID uuid = TA_HELLO_WORLD_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; /* * TA_HELLO_WORLD_CMD_INC_VALUE is the actual function in the TA to be * called. */ printf("Invoking TA to increment %d\n", op.params[0].value.a); res = TEEC_InvokeCommand(&sess, TA_HELLO_WORLD_CMD_INC_VALUE, &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; }