mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-02 23:31:08 +08:00
72 lines
2.4 KiB
Go
72 lines
2.4 KiB
Go
/*
|
|
* Teleport
|
|
* Copyright (C) 2023 Gravitational, Inc.
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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 Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package utils
|
|
|
|
import (
|
|
"crypto/sha256"
|
|
"crypto/subtle"
|
|
"crypto/x509"
|
|
"encoding/hex"
|
|
"strings"
|
|
|
|
"github.com/gravitational/trace"
|
|
)
|
|
|
|
// CalculateSPKI the hash value of the SPKI header in a certificate.
|
|
func CalculateSPKI(cert *x509.Certificate) string {
|
|
sum := sha256.Sum256(cert.RawSubjectPublicKeyInfo)
|
|
return "sha256:" + hex.EncodeToString(sum[:])
|
|
}
|
|
|
|
// CheckSPKI the passed in pin against the calculated value from a certificate.
|
|
func CheckSPKI(pins []string, certs []*x509.Certificate) error {
|
|
// check pins
|
|
for _, pin := range pins {
|
|
// Check that the format of the pin is valid.
|
|
parts := strings.Split(pin, ":")
|
|
if len(parts) != 2 {
|
|
return trace.BadParameter("invalid format for certificate pin, expected algorithm:pin")
|
|
}
|
|
if parts[0] != "sha256" {
|
|
return trace.BadParameter("sha256 only supported hashing algorithm for certificate pin")
|
|
}
|
|
}
|
|
// Timing of this check depends only on the number of pins and certs, not
|
|
// their contents.
|
|
outer:
|
|
for _, cert := range certs {
|
|
for _, pin := range pins {
|
|
// Check that that pin itself matches that value calculated from the passed
|
|
// in certificate.
|
|
if subtle.ConstantTimeCompare([]byte(CalculateSPKI(cert)), []byte(pin)) == 1 {
|
|
continue outer
|
|
}
|
|
}
|
|
return trace.BadParameter(errorMessage)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
var errorMessage = "cluster pin does not match any provided certificate authority pin. " +
|
|
"This could have occurred if the Certificate Authority (CA) for the cluster " +
|
|
"was rotated, invalidating the old pin. This could also occur if a new HSM was " +
|
|
"added. Run \"tctl status\" to compare the pin used to join the cluster to the " +
|
|
"actual pin(s) for the cluster."
|