Hack in command-line specification of domain, cert and key

internal/store/store.go

@@ -2,20 +2,60 @@ package store
 
 import (
 	"context"
+	"crypto/tls"
 )
 
 type Interface interface {
 	Domain() string
+	TLS() tls.Certificate
+	TLSConfig() *tls.Config
+
+	SetDomain(string)
+	SetTLS(tls.Certificate)
 }
 
 func New(ctx context.Context, filename string) (Interface, error) {
-	return &concrete{domain: "example.com"}, nil
+	return &concrete{
+		filename: filename,
+	}, nil
 }
 
 type concrete struct {
+	filename string
+
+	// TODO: these will eventually be persisted to the file in `filename`
 	domain string
+	cert   tls.Certificate
 }
 
 func (c *concrete) Domain() string {
 	return c.domain
 }
+
+func (c *concrete) TLS() tls.Certificate {
+	return c.cert
+}
+
+func (c *concrete) TLSConfig() *tls.Config {
+	return &tls.Config{
+		GetCertificate: func(*tls.ClientHelloInfo) (*tls.Certificate, error) {
+			certCopy := c.TLS()
+
+			return &certCopy, nil
+		},
+
+		ServerName: c.Domain(),
+	}
+}
+
+func (c *concrete) SetDomain(domain string) {
+	c.domain = domain
+
+	return
+}
+
+func (c *concrete) SetTLS(cert tls.Certificate) {
+	c.cert = cert
+
+	return
+}