040000 tree e631556bd6245f796253794e9389c74d821176fc	boringssl
040000 tree 9fae156178317edce995b9147c6422da8dde840c	mbedtls
160000 commit 049485ff557178f646d573eca3bd647f543b760b	nanopb
040000 tree 0c9483d41bc1b5d076d051b626357e4022b36b3e	picotls
160000 commit 2981da2fbef7b80366a0c7d7931b651cb0c9198c	pigweed
040000 tree d579b6e218b51e63a3039dd16cb9690dd9cf64a1	stm32cubef4