2 tofuproxy -- flexible HTTP/HTTPS proxy, TLS terminator, X.509 TOFU
3 manager, WARC/geminispace browser
4 Copyright (C) 2021-2023 Sergey Matveev <stargrave@stargrave.org>
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, version 3 of the License.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
35 type X509Keypair struct {
36 cert *x509.Certificate
41 hostCerts = make(map[string]*X509Keypair)
49 max = max.SetBit(max, 128, 1)
51 Serial, err = rand.Int(rand.Reader, max)
57 func NewKeypair(ai string) (pub, prv any) {
60 prvEcdsa, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
65 pub = prvEcdsa.Public()
68 pub, prv, err = ed25519.GenerateKey(rand.Reader)
73 log.Fatalln("unknown algorithm specified")
80 caCert *x509.Certificate,
81 caPrv crypto.PrivateKey,
83 pub, prv := NewKeypair(X509Algo)
84 notBefore := time.Now()
85 notAfter := notBefore.Add(24 * time.Hour)
86 Serial = Serial.Add(Serial, big.NewInt(1))
87 template := x509.Certificate{
89 Subject: pkix.Name{CommonName: host},
90 DNSNames: []string{host},
94 certRaw, err := x509.CreateCertificate(
95 rand.Reader, &template, caCert, pub, caPrv,
100 cert, err := x509.ParseCertificate(certRaw)
104 return &X509Keypair{cert, prv}