mirror of https://github.com/status-im/consul.git
38 lines
1.0 KiB
Go
38 lines
1.0 KiB
Go
//
|
|
// Copyright (c) 2018, Joyent, Inc. All rights reserved.
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public
|
|
// License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
//
|
|
|
|
package authentication
|
|
|
|
import (
|
|
"crypto/md5"
|
|
"fmt"
|
|
"strings"
|
|
|
|
"golang.org/x/crypto/ssh"
|
|
)
|
|
|
|
// formatPublicKeyFingerprint produces the MD5 fingerprint of the given SSH
|
|
// public key. If display is true, the fingerprint is formatted with colons
|
|
// between each byte, as per the output of OpenSSL.
|
|
func formatPublicKeyFingerprint(key ssh.PublicKey, display bool) string {
|
|
publicKeyFingerprint := md5.New()
|
|
publicKeyFingerprint.Write(key.Marshal())
|
|
publicKeyFingerprintString := fmt.Sprintf("%x", publicKeyFingerprint.Sum(nil))
|
|
|
|
if !display {
|
|
return publicKeyFingerprintString
|
|
}
|
|
|
|
formatted := ""
|
|
for i := 0; i < len(publicKeyFingerprintString); i = i + 2 {
|
|
formatted = fmt.Sprintf("%s%s:", formatted, publicKeyFingerprintString[i:i+2])
|
|
}
|
|
|
|
return strings.TrimSuffix(formatted, ":")
|
|
}
|