EncryptAndSignContract returns a function that signs the workload and env part of a contract and that adds the public key of the signature - enc encrypts a piece of data - signer signs a piece of data - pubKey extracts the public key from the private key.

EncryptContract encrypts the field in a contract with the given public key.

ReadContract reads a contract document from a YAML file, parses and validates it and returns it as a strongly typed data structure.