VPP/HostStack/TLS
From fd.io
TLS App
TLS service is offered by the stack to other client applications via a custom builtin application. The TLS application implements a special transport type that allows it to behave as an application, from the underlying TCP transport perspective, but also as a transport, from the client application perspective. The app does not directly implement the TLS protocol, i.e., the record layer, handshaking protocols and the cryptographic computations and suites [1], instead it relies on the mbedtls library.
References
[1] | RFC5246 The Transport Layer Security (TLS) Protocol Version 1.2 [2] | mbedtls library