Primitives for identity and authorization (library)

 Libtrust is library for managing authentication and authorization using
 public key cryptography.
 .
 Authentication is handled using the identity attached to the public key.
 Libtrust provides multiple methods to prove possession of the private
 key associated with an identity.
 .
  * TLS x509 certificates
  * Signature verification
  * Key Challenge
 .
 Authorization and access control is managed through a distributed trust
 graph. Trust servers are used as the authorities of the trust graph and
 allow caching portions of the graph for faster access.
 .
 This package contains a fork of Docker's libtrust that is being worked
 by the github containers commnuity.