README.md · gjj/incubator-teaclave-trustzone-sdk

# Teaclave TrustZone SDK

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Teaclave TrustZone SDK (Rust OP-TEE TrustZone SDK) provides abilities to build
safe TrustZone applications in Rust. The SDK is based on the
[OP-TEE](https://www.op-tee.org/) project which follows
[GlobalPlatform](https://globalplatform.org/) [TEE
specifications](https://globalplatform.org/specs-library/tee-internal-core-api-specification/)
and provides ergonomic APIs. In addition, it enables the capability to write
TrustZone applications with Rust's standard library (std) and many third-party
libraries (i.e., crates). Teaclave TrustZone SDK is a sub-project of [Apache
Teaclave (incubating)](https://teaclave.apache.org/).

## Table of Contents

- [Quick start with the OP-TEE Repo for QEMUv8](#quick-start-with-the-op-tee-repo-for-qemuv8)
- [Getting started](#getting-started)
  - [Environment](#environment)
    - [Develop with QEMUv8](#develop-with-qemuv8)
    - [Develop on other platforms](#develop-on-other-platforms)
  - [Build & Install](#build--install)
  - [Run Rust Applications](#run-rust-applications)
    - [Run Rust Applications in QEMUv8](#run-rust-applications-in-qemuv8)
    - [Run Rust Applications on other platforms](#run-rust-applications-on-other-platforms)
- [Documentation](#documentation)
- [Publication](#publication)
- [Contributing](#contributing)
- [Community](#community)

## Quick start with the OP-TEE Repo for QEMUv8

Teaclave TrustZone SDK has been integrated into the OP-TEE Repo since OP-TEE
Release 3.15.0 (18/Oct/21). The aarch64 Rust examples are built and installed
into OP-TEE's default filesystem for QEMUv8. Follow [this
documentation](https://optee.readthedocs.io/en/latest/building/optee_with_rust.html)
to set up the OP-TEE repo and try the Rust examples!

## Getting started

### Environment

To get started with Teaclave TrustZone SDK, you could choose either [QEMU for
Armv8-A](#develop-with-qemuv8) (QEMUv8) or [other
platforms](#develop-on-other-platforms) ([platforms OP-TEE
supported](https://optee.readthedocs.io/en/latest/general/platforms.html)) as
your development environment.

#### Develop with QEMUv8

The OP-TEE libraries are needed when building Rust applications, so you should
finish the [Quick start with the OP-TEE Repo for
QEMUv8](#quick-start-with-the-op-tee-repo-for-qemuv8) part first. Then
initialize the building environment in Teaclave TrustZone SDK, build Rust
applications and copy them into the target's filesystem.

Teaclave TrustZone SDK is located in `[YOUR_OPTEE_DIR]/optee_rust/`. Teaclave
TrustZone SDK in OP-TEE repo is pinned to the release version. Alternatively,
you can try the develop version using `git pull`:

```sh
cd [YOUR_OPTEE_DIR]/optee_rust/
git pull github master
```

#### Develop on other platforms

If you are building trusted applications for other platforms ([platforms OP-TEE
supported](https://optee.readthedocs.io/en/latest/general/platforms.html)). QEMU
and the filesystem in the OP-TEE repo are not needed.  You can follow these
steps to clone the project and build applications independently from the
complete OP-TEE repo. In this case, the necessary OP-TEE libraries are
initialized in the setup process.

1. The complete list of prerequisites can be found here: [OP-TEE
Prerequisites](https://optee.readthedocs.io/en/latest/building/prerequisites.html).

``` sh
# install dependencies
sudo apt-get install android-tools-adb android-tools-fastboot autoconf \
  automake bc bison build-essential ccache cscope curl device-tree-compiler \
  expect flex ftp-upload gdisk iasl libattr1-dev libc6:i386 libcap-dev \
  libfdt-dev libftdi-dev libglib2.0-dev libhidapi-dev libncurses5-dev \
  libpixman-1-dev libssl-dev libstdc++6:i386 libtool libz1:i386 make \
  mtools netcat python-crypto python3-crypto python-pyelftools \
  python3-pycryptodome python3-pyelftools python-serial python3-serial \
  rsync unzip uuid-dev xdg-utils xterm xz-utils zlib1g-dev
```

Alternatively, you can use a docker container built with our
[Dockerfile](Dockerfile).

2. After installing dependencies or building the Docker image, fetch the source
   code from the official GitHub repository:

``` sh
# clone the project
git clone https://github.com/apache/incubator-teaclave-trustzone-sdk.git
cd incubator-teaclave-trustzone-sdk
```

### Build & Install

To build the project, the Rust environment and several related submodules are
required.

1. By default, the `OPTEE_DIR` is `incubator-teaclave-trustzone-sdk/optee/`.
  OP-TEE submodules (`optee_os`, `optee_client` and `build`) will be initialized
automatically in `setup.sh`.

If you are building within QEMUv8 or already have the [OP-TEE
repository](https://github.com/OP-TEE)  cloned somewhere, you can set the OP-TEE
root directory with:

```sh
export OPTEE_DIR=[YOUR_OPTEE_DIR]
```

Note: your OPTEE root directory should have `build/`, `optee_os/` and
`optee_client/` as sub-directory.

2. Run the script as follows to install the Rust environment and initialize
   submodules:

```sh
./setup.sh
```

3. Before building examples, the environment should be properly set up with:

``` sh
source environment
```

Note: by default, the target platform is `aarch64`. If you want to build for the
`arm` target, you can setup `ARCH` before the `source environment` command:

```sh
export ARCH=arm
source environment
```

4. Before building rust examples and applications, you need to build OP-TEE
   libraries using:

``` sh
make optee
```

5. Run this command to build all Rust examples:

``` sh
make examples
```

Or build your own CA and TA:

```sh
make -C examples/[YOUR_APPLICATION]
```

Besides, you can collect all example CAs and TAs to
`/incubator-teaclave-trustzone-sdk/out`:

```sh
make examples-install
```

### Run Rust Applications

Considering the platform has been chosen
([QEMUv8](#run-rust-applications-in-qemuv8) or
[other](#run-rust-applications-on-other-platforms)), the ways to run the Rust
applications are different.

#### Run Rust Applications in QEMUv8

1. The shared folder is needed to share CAs and TAs with the QEMU guest system.
Recompile QEMU in OP-TEE to enable QEMU VirtFS:

```sh
(cd $OPTEE_DIR/build && make QEMU_VIRTFS_ENABLE=y qemu)
```

2. Copy all the Rust examples or your own applications to the shared folder:

```sh
mkdir shared_folder
cd [YOUR_OPTEE_DIR]/optee_rust/ && make examples-install)
cp -r [YOUR_OPTEE_DIR]/optee_rust/out/* shared_folder/
```

3. Run QEMU:

```sh
(cd $OPTEE_DIR/build && make run-only QEMU_VIRTFS_ENABLE=y
QEMU_VIRTFS_HOST_DIR=$(pwd)/shared_folder)
```

4. After the QEMU has been booted, you need to mount the shared folder in the
QEMU guest system (username: root), in order to access the compiled CA/TA from
QEMU. Run the command as follows in the QEMU guest terminal:

```sh
mkdir shared && mount -t 9p -o trans=virtio host shared
```

5. Then run CA and TA as [this
documentation](https://optee.readthedocs.io/en/latest/building/optee_with_rust.html)
describes.

#### Run Rust Applications on other platforms

Copy the applications to your platform and run.

## Documentation

- [Overview of OP-TEE Rust
  Examples](https://teaclave.apache.org/trustzone-sdk-docs/overview-of-optee-rust-examples/)
- [Debugging OP-TEE
  TA](https://teaclave.apache.org/trustzone-sdk-docs/debugging-optee-ta.md/)
- [Host API
  Reference](https://teaclave.apache.org/api-docs/trustzone-sdk/optee-teec/)
- [TA API
  Reference](https://teaclave.apache.org/api-docs/trustzone-sdk/optee-utee/)

## Publication

More details about the design and implementation can be found in our paper
published in ACSAC 2020:
[RusTEE: Developing Memory-Safe ARM TrustZone
Applications](https://csis.gmu.edu/ksun/publications/ACSAC20_RusTEE_2020.pdf).
Here is the BiBTeX record for your reference.

```bibtex
@inproceedings{wan20rustee,
    author    = "Shengye Wan and Mingshen Sun and Kun Sun and Ning Zhang and Xu
He",
    title     = "{RusTEE: Developing Memory-Safe ARM TrustZone Applications}",
    booktitle = "Proceedings of the 36th Annual Computer Security Applications
Conference",
    series    = "ACSAC '20",
    year      = "2020",
    month     = "12",
}
```

## Contributing

Teaclave is open source in [The Apache
Way](https://www.apache.org/theapacheway/),
we aim to create a project that is maintained and owned by the community. All
kinds of contributions are welcome.
Thanks to our [contributors](https://teaclave.apache.org/contributors/).

## Community

- Join us on our [mailing
  list](https://lists.apache.org/list.html?dev@teaclave.apache.org).
- Follow us at [@ApacheTeaclave](https://twitter.com/ApacheTeaclave).
- See [more](https://teaclave.apache.org/community/).

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