Function challengeKey

solvers.go:856–864

challengeKey returns the map key for a given challenge; it is the identifier unless it is an IP address using the TLS-ALPN challenge.

(chal acme.Challenge)

// challengeKey returns the map key for a given challenge; it is the identifier
// unless it is an IP address using the TLS-ALPN challenge.
func challengeKey(chal acme.Challenge) string {
	if chal.Type == acme.ChallengeTypeTLSALPN01 && chal.Identifier.Type == "ip" {
		reversed, err := dns.ReverseAddr(chal.Identifier.Value)
		if err == nil {
			return reversed[:len(reversed)-1] // strip off '.'
		}
	}
	return chal.Identifier.Value
}

// solverWrapper should be used to wrap all challenge solvers so that
// we can add the challenge info to memory; this makes challenges globally