040000 tree e631556bd6245f796253794e9389c74d821176fc	boringssl
040000 tree f667ada51f6b4914586cf95a0c803b4ecf6a64c2	freertos
040000 tree 9fae156178317edce995b9147c6422da8dde840c	mbedtls
160000 commit 049485ff557178f646d573eca3bd647f543b760b	nanopb
040000 tree 0c9483d41bc1b5d076d051b626357e4022b36b3e	picotls
160000 commit e485396bb16b735b0c6c227fe64e1e0c551143b6	pigweed