// tofuproxy -- flexible HTTP/HTTPS proxy, TLS terminator, X.509 TOFU
//              manager, WARC/geminispace browser
// Copyright (C) 2021-2024 Sergey Matveev <stargrave@stargrave.org>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package fifos

import (
	"crypto/tls"
	"log"
	"strings"

	"go.cypherpunks.su/ucspi/v2"
	"go.stargrave.org/tofuproxy/caches"
)

func addTLSAuth(p string) {
	for {
		for _, line := range readLinesFromFIFO(p) {
			cols := strings.SplitN(line, " ", 2)
			if len(cols) != 2 {
				log.Println("invalid add-tls-auth line format")
				continue
			}
			if cols[1] == "NONE" {
				caches.TLSAuthCacheM.Lock()
				caches.TLSAuthCache[cols[0]] = &tls.Certificate{}
				caches.TLSAuthCacheM.Unlock()
				log.Printf("%s: added host %s: NONE\n", p, cols[0])
				continue
			}
			_, cert, err := ucspi.CertificateFromFile(cols[1])
			if err != nil {
				log.Fatalln(err)
			}
			prv, err := ucspi.PrivateKeyFromFile(cols[1])
			if err != nil {
				log.Fatalln(err)
			}
			caches.TLSAuthCacheM.Lock()
			caches.TLSAuthCache[cols[0]] = &tls.Certificate{
				Certificate: [][]byte{cert.Raw},
				PrivateKey:  prv,
			}
			caches.TLSAuthCacheM.Unlock()
			log.Printf("%s: added host %s: %s\n", p, cols[0], cert.Subject)
		}
	}
}