OP-TEE : Client/Host application, Trusted Application and Pseudo Trusted Applications

Client/Host application, Trusted Application and Pseudo Trusted Applications

Refer below links for more examples:

 

https://github.com/DevendraDevadiga/optee-secure-bootlog

https://github.com/DevendraDevadiga/OP-TEE-I2C-Test

https://github.com/DevendraDevadiga/raspberry-optee-i2c

https://github.com/DevendraDevadiga/optee-trusted-application

 

Here explaining the complete flow of Client/Host application, Trusted Application and Pseudo Trusted Applications using sample application.

 

Client/Host application

The example Client and Trusted application is provided below:

https://github.com/linaro-swg/optee_examples

We recommend to get the complete source code setup by following QEMU build for ARMv7 by following below link:

https://optee.readthedocs.io/en/latest/building/devices/qemu.html

Enter the optee_example directory and take copy of existing code

$ cd optee_examples
$ mkdir demo
$ cp -rf hello_world/* demo/
$ cd demo

The source codes under "host" folder is for Client/Host application.

$ tree
.
├── Android.mk
├── CMakeLists.txt
├── host
│   ├── main.c
│   └── Makefile
├── Makefile
└── ta
    ├── Android.mk
    ├── hello_world_ta.c
    ├── include
    │   └── hello_world_ta.h
    ├── Makefile
    ├── sub.mk
    └── user_ta_header_defines.h

3 directories, 11 files
$

Change the name of your host application. In make files binary name used as "optee_example_hello_world". This can be named as anything as your wish, its the name of the host binary which will be generated.

E.g SecureApp or optee_example_demo etc For demo purpose we can use as "optee_example_demo"

Android.mk and CMakeLists.txt- When OP-TEE used along with Android OS build setup, this file will be used.

$ vi Android.mk

-LOCAL_MODULE := optee_example_hello_world
+LOCAL_MODULE := optee_example_demo

$ vi CMakeLists.txt

-project (optee_example_hello_world C)
+project (optee_example_demo C)

host/Makefile - When OP-TEE used with Linux build setup this file will be used.

$ vi host/Makefile

-BINARY = optee_example_hello_world
+BINARY = optee_example_demo