From bf50d7010a26468791f4397c0f0c4f9a8ed1d6a2 Mon Sep 17 00:00:00 2001
From: Matthew Holt <mholt@users.noreply.github.com>
Date: Tue, 2 Feb 2021 17:23:52 -0700
Subject: acmeserver: Support custom CAs from Caddyfile

The HTTP Caddyfile adapter can now configure the PKI app, and the acme_server directive can now be used to specify a custom CA used for issuing certificates. More customization options can follow later as needed.
---
 modules/caddypki/acmeserver/caddyfile.go | 47 ++++++++++++++++++++++++++++----
 1 file changed, 41 insertions(+), 6 deletions(-)

(limited to 'modules/caddypki/acmeserver')

diff --git a/modules/caddypki/acmeserver/caddyfile.go b/modules/caddypki/acmeserver/caddyfile.go
index 6687460..9ac0bb2 100644
--- a/modules/caddypki/acmeserver/caddyfile.go
+++ b/modules/caddypki/acmeserver/caddyfile.go
@@ -16,23 +16,58 @@ package acmeserver
 
 import (
 	"github.com/caddyserver/caddy/v2/caddyconfig/httpcaddyfile"
-	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
+	"github.com/caddyserver/caddy/v2/modules/caddypki"
 )
 
 func init() {
-	httpcaddyfile.RegisterHandlerDirective("acme_server", parseACMEServer)
+	httpcaddyfile.RegisterDirective("acme_server", parseACMEServer)
 }
 
 // parseACMEServer sets up an ACME server handler from Caddyfile tokens.
 //
-//     acme_server [<matcher>]
+//     acme_server [<matcher>] {
+//         ca <id>
+//     }
 //
-func parseACMEServer(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
-	var as Handler
+func parseACMEServer(h httpcaddyfile.Helper) ([]httpcaddyfile.ConfigValue, error) {
+	if !h.Next() {
+		return nil, h.ArgErr()
+	}
+
+	matcherSet, err := h.ExtractMatcherSet()
+	if err != nil {
+		return nil, err
+	}
+
+	var acmeServer Handler
+	var ca *caddypki.CA
+
 	for h.Next() {
 		if h.NextArg() {
 			return nil, h.ArgErr()
 		}
+		for h.NextBlock(0) {
+			switch h.Val() {
+			case "ca":
+				if !h.AllArgs(&acmeServer.CA) {
+					return nil, h.ArgErr()
+				}
+				if ca == nil {
+					ca = new(caddypki.CA)
+				}
+				ca.ID = acmeServer.CA
+			}
+		}
 	}
-	return as, nil
+
+	configVals := h.NewRoute(matcherSet, acmeServer)
+
+	if ca == nil {
+		return configVals, nil
+	}
+
+	return append(configVals, httpcaddyfile.ConfigValue{
+		Class: "pki.ca",
+		Value: ca,
+	}), nil
 }
-- 
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