040000 tree b4430aba9a1a9ec29181cbbaed1ed72a3a484863	boringssl
040000 tree f76d5fccfd0a4d2e554fc405c0eb85c56de7641e	mbedtls
160000 commit 049485ff557178f646d573eca3bd647f543b760b	nanopb
040000 tree e1310f305cb5a036d857d987770460d2dc7cb403	picotls
160000 commit 959b883061cd10018b2e69660b057e2d593cbe71	pigweed