-
Notifications
You must be signed in to change notification settings - Fork 155
/
dialer_pinning_checker_default.go
48 lines (40 loc) · 1.32 KB
/
dialer_pinning_checker_default.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
// Copyright (c) 2022 Proton AG
//
// This file is part of Proton Mail Bridge.Bridge.
//
// Proton Mail Bridge 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, either version 3 of the License, or
// (at your option) any later version.
//
// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
//go:build !build_qa
package dialer
import (
"crypto/tls"
"errors"
"net"
)
// CheckCertificate returns whether the connection presents a known TLS certificate.
func (p *TLSPinChecker) CheckCertificate(conn net.Conn) error {
tlsConn, ok := conn.(*tls.Conn)
if !ok {
return errors.New("connection is not a TLS connection")
}
connState := tlsConn.ConnectionState()
for _, peerCert := range connState.PeerCertificates {
fingerprint := certFingerprint(peerCert)
for _, pin := range p.trustedPins {
if pin == fingerprint {
return nil
}
}
}
return ErrTLSMismatch
}