forked from gravitational/teleport
/
fingerprint.go
49 lines (44 loc) · 1.54 KB
/
fingerprint.go
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/*
* 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 sshutils
import (
"github.com/gravitational/trace"
"golang.org/x/crypto/ssh"
)
// Fingerprint returns SSH RFC4716 fingerprint of the key
func Fingerprint(key ssh.PublicKey) string {
return ssh.FingerprintSHA256(key)
}
// AuthorizedKeyFingerprint returns fingerprint from public key
// in authorized key format
func AuthorizedKeyFingerprint(publicKey []byte) (string, error) {
key, _, _, _, err := ssh.ParseAuthorizedKey(publicKey)
if err != nil {
return "", trace.Wrap(err)
}
return Fingerprint(key), nil
}
// PrivateKeyFingerprint returns fingerprint of the public key
// extracted from the PEM encoded private key
func PrivateKeyFingerprint(keyBytes []byte) (string, error) {
signer, err := ssh.ParsePrivateKey(keyBytes)
if err != nil {
return "", trace.Wrap(err)
}
return Fingerprint(signer.PublicKey()), nil
}