49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
// Copyright (c) 2023 Proton AG
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//
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// This file is part of Proton Mail Bridge.Bridge.
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//
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// Proton Mail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Proton Mail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
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//go:build !build_qa
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package dialer
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import (
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"crypto/tls"
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"errors"
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"net"
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)
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// CheckCertificate returns whether the connection presents a known TLS certificate.
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func (p *TLSPinChecker) CheckCertificate(conn net.Conn) error {
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tlsConn, ok := conn.(*tls.Conn)
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if !ok {
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return errors.New("connection is not a TLS connection")
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}
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connState := tlsConn.ConnectionState()
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for _, peerCert := range connState.PeerCertificates {
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fingerprint := certFingerprint(peerCert)
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for _, pin := range p.trustedPins {
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if pin == fingerprint {
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return nil
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}
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}
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}
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return ErrTLSMismatch
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}
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