61 lines
1.1 KiB
Go
61 lines
1.1 KiB
Go
package main
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import (
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"crypto"
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"crypto/ed25519"
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"encoding/hex"
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"fmt"
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"flag"
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"log"
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"os"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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func main() {
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flagKey := flag.String("key", "jwt.key", "key file")
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flag.Parse()
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pub, key, err := loadKey(*flagKey)
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if err != nil {
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log.Fatalln(err)
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}
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token := jwt.NewWithClaims(jwt.SigningMethodEdDSA, jwt.MapClaims{
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"publickey": hex.EncodeToString(pub),
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"iat": time.Now().UTC().Unix(),
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})
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s, err := token.SignedString(key)
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if err != nil {
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log.Fatalln(err)
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}
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fmt.Println(s)
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}
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func loadKey(name string) (ed25519.PublicKey, crypto.Signer, error) {
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b, err := os.ReadFile(name)
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if err == nil {
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key := ed25519.NewKeyFromSeed(b)
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pub := key.Public().(ed25519.PublicKey)
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return pub, key, nil
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}
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if err != nil && !os.IsNotExist(err) {
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return nil, nil, err
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}
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var (
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key ed25519.PrivateKey
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pub ed25519.PublicKey
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)
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if pub, key, err = ed25519.GenerateKey(nil); err != nil {
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return nil, nil, err
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}
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if err = os.WriteFile(name, key.Seed(), 0600); err != nil {
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return nil, nil, err
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}
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return pub, key, nil
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}
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