Specification

We want the ability to generate the TLS cert chain and private key PEMs for testing. We should also create fast-check arbitraries for this.

We need to replicate the KeyPair generation, x509 certificate creation and PEM format from the Polykey methods. Since these will be used for testing, the types can be striped down to primitives and any extra information can be as placeholder as possible. Refer to the keys domain in Polykey for how these are created.

Additional context

• Related Enable TLS Configuration with in-memory PEM strings #2
• Does boringssl support Ed25519 certificates? cloudflare/boring#113
• How to get Ed25519 x509 certificates working with quiche? cloudflare/quiche#1482

Tasks

1. Create simplified method for generating key pairs.
2. Create simplified method for generating x509 certificates
3. Create simplified method for generating cert chain and private key PEM formats.