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Hernan Gatta
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Add sample for using Generic RPC's.
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‎rpc/Android.mk

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###################### optee-rpc ######################
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LOCAL_PATH := $(call my-dir)
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OPTEE_CLIENT_EXPORT = $(LOCAL_PATH)/../../optee_client/out/export
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include $(CLEAR_VARS)
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LOCAL_CFLAGS += -DANDROID_BUILD
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LOCAL_CFLAGS += -Wall
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LOCAL_SRC_FILES += host/main.c
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LOCAL_C_INCLUDES := $(LOCAL_PATH)/ta/include \
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$(OPTEE_CLIENT_EXPORT)/include \
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LOCAL_SHARED_LIBRARIES := libteec
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LOCAL_MODULE := optee_example_rpc
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LOCAL_VENDOR_MODULE := true
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LOCAL_MODULE_TAGS := optional
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include $(BUILD_EXECUTABLE)
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include $(LOCAL_PATH)/ta/Android.mk

‎rpc/CMakeLists.txt

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project (optee_example_rpc C)
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set (SRC host/main.c)
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add_executable (${PROJECT_NAME} ${SRC})
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target_include_directories(${PROJECT_NAME}
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PRIVATE ta/include
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PRIVATE include)
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add_compile_options(-g)
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add_compile_options(-O0)
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add_compile_options(-no-pie)
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add_compile_options(-no-pic)
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target_link_libraries (${PROJECT_NAME} PRIVATE teec)
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install (TARGETS ${PROJECT_NAME} DESTINATION ${CMAKE_INSTALL_BINDIR})

‎rpc/Makefile

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export V?=0
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HOST_CROSS_COMPILE ?= $(CROSS_COMPILE)
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TA_CROSS_COMPILE ?= $(CROSS_COMPILE)
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.PHONY: all
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all:
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$(MAKE) -C host CROSS_COMPILE="$(HOST_CROSS_COMPILE)" --no-builtin-variables
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$(MAKE) -C ta CROSS_COMPILE="$(TA_CROSS_COMPILE)" LDFLAGS=""
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.PHONY: clean
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clean:
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$(MAKE) -C host clean
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$(MAKE) -C ta clean

‎rpc/host/Makefile

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CC ?= $(CROSS_COMPILE)gcc
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LD ?= $(CROSS_COMPILE)ld
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AR ?= $(CROSS_COMPILE)ar
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NM ?= $(CROSS_COMPILE)nm
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OBJCOPY ?= $(CROSS_COMPILE)objcopy
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OBJDUMP ?= $(CROSS_COMPILE)objdump
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READELF ?= $(CROSS_COMPILE)readelf
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OBJS = main.o
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CFLAGS += -Wall -I../ta/include -I$(TEEC_EXPORT)/include -I./include -g -O0 -no-pie -no-pic
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LDADD += -lteec -L$(TEEC_EXPORT)/lib
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BINARY = optee_example_rpc
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.PHONY: all
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all: $(BINARY)
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$(BINARY): $(OBJS)
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$(CC) -o $@ $< $(LDADD)
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.PHONY: clean
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clean:
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rm -f $(OBJS) $(BINARY)
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%.o: %.c
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$(CC) $(CFLAGS) -c $< -o $@

‎rpc/host/main.c

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/*
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* Copyright (c) 2019, Microsoft Corporation
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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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#include <err.h>
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#include <stdio.h>
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#include <string.h>
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#include <tee_client_api.h>
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#include <tee_client_api_extensions.h>
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#include <rpc.h>
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static TEEC_Result rpc_callback(int func_id, TEEC_Parameter *parameters,
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void *context)
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{
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struct ta_rpc_func_params *par;
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const char *msg = "wonderful world!";
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const char *full_msg = "What a wonderful world!";
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printf("Have RPC: %i\n", func_id);
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switch (func_id)
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{
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case TA_RPC_FUNC_NO_PARAMS:
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break;
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case TA_RPC_FUNC_PARAMS_IN:
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printf("First param: 0x%x, 0x%x.\n", parameters[0].value.a,
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parameters[0].value.b);
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printf("Fourth param: %s\n",
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(char *)parameters[3].tmpref.buffer);
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break;
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case TA_RPC_FUNC_PARAMS_INOUT:
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par = (struct ta_rpc_func_params *)parameters[2].tmpref.buffer;
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printf("First param: 0x%x, 0x%x.\n", parameters[0].value.a,
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parameters[0].value.b);
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printf("Second param: 0x%x, 0x%x.\n", parameters[1].value.a,
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parameters[1].value.b);
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printf("Third param: %s\n", par->second);
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printf("Fourth param: %s\n",
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(char *)parameters[3].tmpref.buffer);
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parameters[1].value.a = 0x3;
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parameters[1].value.b = 0xA;
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memcpy(par->second, msg, strlen(msg) + 1);
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break;
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case TA_RPC_FUNC_PARAMS_OUT:
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parameters[0].value.a = 0x4;
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parameters[0].value.b = 0xB;
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parameters[3].tmpref.size = strlen(full_msg) + 1;
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memcpy(parameters[3].tmpref.buffer, full_msg,
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parameters[3].tmpref.size);
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break;
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default:
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TEEC_ERROR_BAD_PARAMETERS;
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}
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return TEEC_SUCCESS;
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}
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int main(void)
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{
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TEEC_Result res;
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TEEC_Context ctx;
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TEEC_Session sess;
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TEEC_Operation op;
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TEEC_UUID uuid = TA_RPC_UUID;
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uint32_t err_origin;
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res = TEEC_InitializeContext(NULL, &ctx);
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if (res != TEEC_SUCCESS)
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errx(1, "TEEC_InitializeContext failed with code 0x%x", res);
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res = TEEC_OpenSessionEx(&ctx, &sess, &uuid,
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TEEC_LOGIN_PUBLIC, NULL, NULL, &err_origin,
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rpc_callback, &sess);
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if (res != TEEC_SUCCESS)
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errx(1, "TEEC_OpenSessionEx failed with code 0x%x origin 0x%x",
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res, err_origin);
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/*
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* First Call
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*/
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memset(&op, 0, sizeof(op));
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op.paramTypes = TEEC_PARAM_TYPES(TEEC_NONE, TEEC_NONE, TEEC_NONE,
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TEEC_NONE);
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printf("Invoking TA to perform RPC back to host\n");
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res = TEEC_InvokeCommand(&sess, TA_RPC_CMD_TEST_RPC_NO_PARAMS, &op,
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&err_origin);
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if (res != TEEC_SUCCESS)
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errx(1, "TEEC_InvokeCommand failed with code 0x%x origin 0x%x",
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res, err_origin);
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printf("Performed call\n");
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/*
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* Second Call
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*/
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printf("Invoking TA to perform RPC back to host\n");
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res = TEEC_InvokeCommand(&sess, TA_RPC_CMD_TEST_RPC_PARAM_IN, &op,
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&err_origin);
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if (res != TEEC_SUCCESS)
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errx(1, "TEEC_InvokeCommand failed with code 0x%x origin 0x%x",
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res, err_origin);
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printf("Performed call\n");
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/*
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* Third Call
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*/
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printf("Invoking TA to perform RPC back to host\n");
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res = TEEC_InvokeCommand(&sess, TA_RPC_CMD_TEST_RPC_PARAM_INOUT, &op,
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&err_origin);
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if (res != TEEC_SUCCESS)
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errx(1, "TEEC_InvokeCommand failed with code 0x%x origin 0x%x",
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res, err_origin);
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printf("Performed call\n");
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/*
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* Fourth Call
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*/
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printf("Invoking TA to perform RPC back to host\n");
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res = TEEC_InvokeCommand(&sess, TA_RPC_CMD_TEST_RPC_PARAM_OUT, &op,
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&err_origin);
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if (res != TEEC_SUCCESS)
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errx(1, "TEEC_InvokeCommand failed with code 0x%x origin 0x%x",
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res, err_origin);
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printf("Performed call\n");
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TEEC_CloseSession(&sess);
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TEEC_FinalizeContext(&ctx);
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return 0;
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}

‎rpc/ta/Android.mk

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LOCAL_PATH := $(call my-dir)
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local_module := 926297c6-c2d3-4bd9-82b4-17460f55b6a4.ta
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include $(BUILD_OPTEE_MK)

‎rpc/ta/Makefile

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CFG_TEE_TA_LOG_LEVEL ?= 4
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CPPFLAGS += -DCFG_TEE_TA_LOG_LEVEL=$(CFG_TEE_TA_LOG_LEVEL)
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BINARY=926297c6-c2d3-4bd9-82b4-17460f55b6a4
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-include $(TA_DEV_KIT_DIR)/mk/ta_dev_kit.mk
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ifeq ($(wildcard $(TA_DEV_KIT_DIR)/mk/ta_dev_kit.mk), )
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clean:
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@echo 'Note: $$(TA_DEV_KIT_DIR)/mk/ta_dev_kit.mk not found, cannot clean TA'
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@echo 'Note: TA_DEV_KIT_DIR=$(TA_DEV_KIT_DIR)'
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endif

‎rpc/ta/include/rpc.h

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/*
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* Copyright (c) 2019, Microsoft Corporation
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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
18+
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
19+
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20+
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21+
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22+
* 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 TA_RPC_H
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#define TA_RPC_H
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#define TA_RPC_UUID \
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{ 0x926297c6, 0xc2d3, 0x4bd9, \
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{ 0x82, 0xb4, 0x17, 0x46, 0x0f, 0x55, 0xb6, 0xa4} }
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#define TA_RPC_CMD_TEST_RPC_NO_PARAMS 0
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#define TA_RPC_CMD_TEST_RPC_PARAM_IN 1
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#define TA_RPC_CMD_TEST_RPC_PARAM_INOUT 2
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#define TA_RPC_CMD_TEST_RPC_PARAM_OUT 3
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#define TA_RPC_FUNC_NO_PARAMS 1
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#define TA_RPC_FUNC_PARAMS_IN 2
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#define TA_RPC_FUNC_PARAMS_INOUT 3
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#define TA_RPC_FUNC_PARAMS_OUT 4
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/* Sample function parameters marshalling structure. */
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struct ta_rpc_func_params {
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uint32_t first;
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char second[256];
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};
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#endif /*TA_RPC_H*/

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