CreateTestECDSACertificate creates a valid ECDSA P-256 certificate.

CreateTestEd25519Certificate creates an Ed25519 certificate which should be rejected in FIPS mode.

CreateTestRSACertificate creates a valid 2048-bit RSA certificate.

GenerateSelfSignedCert generates a self-signed certificate that is valid for given domain names and IPs.

Credentials keeps the typical 3 components of a proper TLS configuration.