meta-parsec layer

This layer contains recipes for the Parsec service and parsec tools.

Dependencies

This layer depends on:

URI: git://git.openembedded.org/meta-openembedded
branch: master

URI git://git.yoctoproject.org/meta-security
branch: master

URI https://github.com/kraj/meta-clang.git
branch: master

Adding the meta-parsec layer to your build

In order to use this layer, you need to make the build system aware of it.

You can add it to the build system by adding the location of the meta-parsec layer to bblayers.conf, along with any other layers needed. e.g.:

BBLAYERS ?= " \
  /path/to/yocto/meta \
  /path/to/yocto/meta-yocto \
  /path/to/yocto/meta-yocto-bsp \
  /path/to/meta-openembedded/meta-oe \
  /path/to/meta-openembedded/meta-python \
  /path/to/meta-clang \
  /path/to/meta-security/meta-tpm \
  /path/to/meta-security/meta-parsec \
  "

To include the Parsec service into your image add following into the local.conf:

IMAGE_INSTALL:append = " parsec-service"

By default the Parsec service will be deployed into the image with PKCS11 and MBED-CRYPTO providers build-in. The TPM provider will also be built by default if:

  • DISTRO_FEATURES contains "tmp2" and
  • "tpm-layer" (meta-tpm) is included in BBLAYERS

The trusted service provider depends on libts recipe from meta-arm layer.

You can use PACKAGECONFIG for Parsec servic recipe to define what providers should be built in. For example:

PACKAGECONFIG:pn-parsec-service = "TS"

The default Parsec service config file is taken from the Parsec repository: https://github.com/parallaxsecond/parsec/blob/main/config.toml This config file contains the MbedCrypto provider enabled. The config needs to be updated to use the Parsec service with other providers like TPM or PKCS11. The required changes are covered in Parsec documentation https://parallaxsecond.github.io/parsec-book/

PARSEC_CONFIG can be used in a bbappend file to replace the default config. For example:

FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
SRC_URI += "file://config-TS.toml \
           "
PARSEC_CONFIG = "${WORKDIR}/config-TS.toml"

Updating recipes

The parsec-service and parsec-tool recipes use include files with lists of all rust crates required. This allows bitbake to fetch all the necessary dependent crates, as well as a pegged version of the crates.io index, to ensure maximum reproducibility. It's recommended to use cargo-bitbake to generate include files for new versions of parsec recipes. https://github.com/meta-rust/cargo-bitbake

When you have crago-bitbake built:

  1. Checkout the required version of parsec repository.
  2. Run cargo-bitbake inside the repository. It will produce a BB file.
  3. Create a new include file with SRC_URI and LIC_FILES_CHKSUM from the BB file.

Automated Parsec testing with runqemu

The Yocto build system has the ability to run a series of automated tests for qemu images. All the tests are actually commands run on the target system over ssh.

Meta-parsec includes automated unittests which run end to end Parsec tests. The tests are run against:

  • all providers pre-configured in the Parsec config file included in the image.
  • PKCS11 and TPM providers with software backends if softhsm and swtpm packages included in the image.
  • TS Provider if Parsec is built with it included.

Meta-parsec also contains a recipe for security-parsec-image image with Parsec, softhsm and swtpm included.

Please notice that the account you use to run bitbake should have access to /dev/kvm. You might need to change permissions or add the account into kvm unix group.

  1. Testing Parsec with your own image where parsec-service and parsec-tool are already included.
  • Add into your local.conf:
INHERIT += "testimage"
TEST_SUITES = "ping ssh parsec"
  • Build your image
bitbake <your-image>
  • Run tests
bitbake <your-image> -c testimage
  1. Testing Parsec with pre-defined security-parsec-image image.
  • Add into your local.conf:
DISTRO_FEATURES += " tpm2"
INHERIT += "testimage"
TEST_SUITES = "ping ssh parsec"
  • Build security-parsec-image image
bitbake security-parsec-image
  • Run tests
bitbake security-parsec-image -c testimage

Output of a successfull tests run should look similar to:

RESULTS:
RESULTS - ping.PingTest.test_ping: PASSED (0.05s)
RESULTS - ssh.SSHTest.test_ssh: PASSED (0.25s)
RESULTS - parsec.ParsecTest.test_all_providers: PASSED (1.84s)
RESULTS - parsec.ParsecTest.test_pkcs11_provider: PASSED (2.91s)
RESULTS - parsec.ParsecTest.test_tpm_provider: PASSED (3.33s)
SUMMARY:
security-parsec-image () - Ran 5 tests in 8.386s
security-parsec-image - OK - All required tests passed (successes=5, skipped=0, failures=0, errors=0)

Manual testing with runqemu

This layer also contains a recipe for pasec-tool which can be used for manual testing of the Parsec service:

IMAGE_INSTALL:append = " parsec-tool"

There are a series of Parsec Demo videos showing how to use parsec-tool to test the Parsec service base functionality: https://www.youtube.com/watch?v=ido0CyUdMHM&list=PLKjl7IFAwc4S7WQqqphCsyy6DPDxJ2Skg&index=4

The parsec-tool recipe also includes parsec-cli-tests.sh script which runs e2e tests against all providers enabled and configured in Parsec service.

You can use runqemu to start a VM with a built image file and run manual tests with parsec-tool.

Enabling Parsec providers for manual testing

  1. MbedCrypto provider The default Parsec service config file contains the MbedCrypto provider enabled. No changes required.

  2. PKCS11 provider The Software HSM can be used for manual testing of the provider by including it into your test image:

    IMAGE_INSTALL:append = " softhsm"

Inside the running VM:

  • Stop Parsec
systemctl stop parsec
  • Initialise a token and notice the result slot number
softhsm2-util --init-token --slot 0 --label "Parsec Service" --pin 123456 --so-pin 123456
  • Change the token ownership:
for d in /var/lib/softhsm/tokens/*; do chown -R parsec $d; done
  • Enable the PKCS11 provider and update its parameters in the Parsec config file /etc/parsec/config.toml
library_path = "/usr/lib/softhsm/libsofthsm2.so"
slot_number = <slot number>
user_pin = "123456"
  • Start Parsec
systemctl start parsec

  1. TPM provider The IBM Software TPM service can be used for manual testing of the provider by including it into your test image:

    IMAGE_INSTALL:append = " swtpm tpm2-tools libtss2 libtss2-tcti-mssim"

Inside the running VM:

  • Stop Parsec
systemctl stop parsec
  • Start and configure the Software TPM server
   /usr/bin/tpm_server &
   sleep 5
   /usr/bin/tpm2_startup -c -T mssim
   /usr/bin/tpm2_changeauth -c owner tpm_pass
  • Enable the TPM provider and update its parameters in the Parsec config file /etc/parsec/config.toml
tcti = "mssim"
owner_hierarchy_auth = "hex:74706d5f70617373"
  • Start Parsec
systemctl start parsec

Maintenance

Send pull requests, patches, comments or questions to yocto-patches@lists.yoctoproject.org

When sending single patches, please using something like: 'git send-email -1 --to yocto-patches@lists.yoctoproject.org --subject-prefix=meta-parsec][PATCH'

These values can be set as defaults for this repository:

$ git config sendemail.to yocto-patches@lists.yoctoproject.org $ git config format.subjectPrefix meta-parsec][PATCH

Now you can just do 'git send-email origin/master' to send all local patches.

Maintainers: Anton Antonov Anton.Antonov@arm.com Armin Kuster akuster808@gmail.com

License

All metadata is MIT licensed unless otherwise stated. Source code included in tree for individual recipes is under the LICENSE stated in each recipe (.bb file) unless otherwise stated.