mirror of
https://github.com/ClusterCockpit/cc-backend
synced 2024-09-20 11:27:26 +02:00
82 lines
2.4 KiB
Go
82 lines
2.4 KiB
Go
// Copyright (C) 2022 Paderborn Center for Parallel Computing, Paderborn University
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// This code is released under MIT License:
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package main
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import (
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"crypto/ed25519"
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"crypto/x509"
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"encoding/base64"
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"encoding/pem"
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"fmt"
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"os"
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)
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func main() {
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filepath := ""
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if len(os.Args) > 1 {
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filepath = os.Args[1]
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} else {
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PrintUsage()
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os.Exit(1)
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}
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pubkey, err := LoadEd255519PubkeyFromPEMFile(filepath)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %s\n", err.Error())
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os.Exit(1)
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}
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fmt.Fprintf(os.Stdout,
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"CROSS_LOGIN_JWT_PUBLIC_KEY=%#v\n",
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base64.StdEncoding.EncodeToString(pubkey))
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}
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// Loads an ed25519 public key stored in a file in PEM format
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func LoadEd255519PubkeyFromPEMFile(filePath string) (ed25519.PublicKey, error) {
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buffer, err := os.ReadFile(filePath)
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if err != nil {
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return nil, err
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}
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block, _ := pem.Decode(buffer)
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if block == nil {
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return nil, fmt.Errorf("no pem block found")
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}
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pubkey, err := x509.ParsePKIXPublicKey(block.Bytes)
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if err != nil {
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return nil, err
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}
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ed25519PublicKey, success := pubkey.(ed25519.PublicKey)
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if !success {
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return nil, fmt.Errorf("not an ed25519 key")
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}
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return ed25519PublicKey, nil
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}
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func PrintUsage() {
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fmt.Fprintf(os.Stderr, "Usage: %s <filename>\n", os.Args[0])
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fmt.Fprintf(os.Stderr, "where <filename> contains an Ed25519 public key in PEM format\n")
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fmt.Fprintf(os.Stderr, "(starting with '-----BEGIN PUBLIC KEY-----')\n")
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}
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