mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-02 23:31:08 +08:00
STeve (Xin) Huang
903fee053f
* GitHub Proxy part 3: gen github user cert and export CA * address pr comment * minor refactor * use cache * fix build and cache
67 lines
2.0 KiB
Go
67 lines
2.0 KiB
Go
/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* This program 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package sshutils
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import (
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"strings"
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"github.com/gravitational/trace"
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"golang.org/x/crypto/ssh"
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)
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// Fingerprint returns SSH RFC4716 fingerprint of the key
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func Fingerprint(key ssh.PublicKey) string {
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return ssh.FingerprintSHA256(key)
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}
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// AuthorizedKeyFingerprint returns fingerprint from public key
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// in authorized key format
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func AuthorizedKeyFingerprint(publicKey []byte) (string, error) {
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key, _, _, _, err := ssh.ParseAuthorizedKey(publicKey)
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if err != nil {
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return "", trace.Wrap(err)
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}
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return Fingerprint(key), nil
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}
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// PrivateKeyFingerprint returns fingerprint of the public key
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// extracted from the PEM encoded private key
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func PrivateKeyFingerprint(keyBytes []byte) (string, error) {
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signer, err := ssh.ParsePrivateKey(keyBytes)
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if err != nil {
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return "", trace.Wrap(err)
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}
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return Fingerprint(signer.PublicKey()), nil
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}
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// fingerprintPrefix is the fingerprint prefix added by ssh.FingerprintSHA256.
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const fingerprintPrefix = "SHA256:"
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func maybeAddPrefix(fingerprint string) string {
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if !strings.HasPrefix(fingerprint, fingerprintPrefix) {
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return fingerprintPrefix + fingerprint
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}
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return fingerprint
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}
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// EqualFingerprints checks if two finger prints are equal.
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func EqualFingerprints(a, b string) bool {
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return strings.EqualFold(maybeAddPrefix(a), maybeAddPrefix(b))
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}
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