111 lines
2.3 KiB
Go
111 lines
2.3 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"io/ioutil"
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"os"
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"strings"
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crp "github.com/libp2p/go-libp2p-core/crypto"
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peer "github.com/libp2p/go-libp2p-core/peer"
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)
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func main() {
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size := flag.Int("bitsize", 2048, "select the bitsize of the key to generate")
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typ := flag.String("type", "", "select type of key to generate (RSA, Ed25519, Secp256k1 or ECDSA)")
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key := flag.String("key", "", "specify the location of the key to decode it's peerID")
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flag.Parse()
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if *key != "" {
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if err := readKey(key, typ); err != nil {
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fmt.Fprintln(os.Stderr, err)
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}
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return
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}
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if *typ == "" {
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*typ = "RSA"
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}
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if err := genKey(typ, size); err != nil {
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fmt.Fprintln(os.Stderr, err)
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}
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return
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}
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func readKey(keyLoc *string, typ *string) error {
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data, err := ioutil.ReadFile(*keyLoc)
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if err != nil {
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return err
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}
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fmt.Fprintf(os.Stderr, "Reading key at: %s\n", *keyLoc)
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var unmarshalPrivateKeyFucn func(data []byte) (crp.PrivKey, error)
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// rsa and ed25519 unmarshalPrivateKeyFucn are for backward compatibility
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// for keys saved with raw(), to read such keys, specify the key type
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switch strings.ToLower(*typ) {
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case "rsa":
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unmarshalPrivateKeyFucn = crp.UnmarshalRsaPrivateKey
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case "ed25519":
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unmarshalPrivateKeyFucn = crp.UnmarshalEd25519PrivateKey
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default:
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unmarshalPrivateKeyFucn = crp.UnmarshalPrivateKey
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}
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prvk, err := unmarshalPrivateKeyFucn(data)
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if err != nil {
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return err
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}
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id, err := peer.IDFromPrivateKey(prvk)
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if err != nil {
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return err
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}
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_, err = fmt.Fprintf(os.Stderr, "Success!\nID for %s key: %s\n", prvk.Type().String(), id.Pretty())
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return err
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}
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func genKey(typ *string, size *int) error {
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var atyp int
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switch strings.ToLower(*typ) {
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case "rsa":
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atyp = crp.RSA
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case "ed25519":
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atyp = crp.Ed25519
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case "secp256k1":
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atyp = crp.Secp256k1
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case "ecdsa":
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atyp = crp.ECDSA
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default:
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return fmt.Errorf("unrecognized key type: %s", *typ)
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}
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fmt.Fprintf(os.Stderr, "Generating a %d bit %s key...\n", *size, *typ)
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priv, pub, err := crp.GenerateKeyPair(atyp, *size)
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if err != nil {
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return err
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}
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pid, err := peer.IDFromPublicKey(pub)
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if err != nil {
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return err
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}
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data, err := crp.MarshalPrivateKey(priv)
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if err != nil {
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return err
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}
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_, err = os.Stdout.Write(data)
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if err != nil {
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return nil
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}
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_, err = fmt.Fprintf(os.Stderr, "Success!\nID for generated key: %s\n", pid.Pretty())
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return err
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}
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