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main.go
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main.go
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// Copyright (c) 2020-2021 Blockwatch Data Inc.
// Author: alex@blockwatch.cc
// Key examples
//
// # Private Keys
// mv1: edsk3nM41ygNfSxVU4w1uAW3G9EnTQEB5rjojeZedLTGmiGRcierVv
// mv2: spsk1zkqrmst1yg2c4xi3crWcZPqgdc9KtPtb9SAZWYHAdiQzdHy7j
// mv3: p2sk3PM77YMR99AvD3fSSxeLChMdiQ6kkEzqoPuSwQqhPsh29irGLC
//
// # Encrypted keys (pw: foo)
// mv1: edesk1uiM6BaysskGto8pRtzKQqFqsy1sea1QRjTzaQYuBxYNhuN6eqEU78TGRXZocsVRJYcN7AaU9JDykwUd8KW
// mv2: spesk246GnDVaqGoYZvKbjrWM1g6xUXnyETXtwZgEYFnP8BQXcaS4rfQQco7C94D1yBmcL1v46Sqy8fXrhBSM7TW
// mv3: p2esk27ocLPLp1JkTWfxByXysGyB7MBDURYJAzAGJLR3XSEV9Nq8wFFdDVXVTwvCwR7Ne2dcUveamjXbvZf3on6T
//
// # Signatures
// edsigtzLBGCyadERX1QsYHKpwnxSxEYQeGLnJGsSkHEsyY8vB5GcNdnvzUZDdFevJK7YZQ2ujwVjvQZn62ahCEcy74AwtbA8HuN
// spsig1RriZtYADyRhyNoQMa6AiPuJJ7AUDcrxWZfgqexzgANqMv4nXs6qsXDoXcoChBgmCcn2t7Y3EkJaVRuAmNh2cDDxWTdmsz
// sigUdRdXYCXW14xqT8mFTMkX4wSmDMBmcW1Vuz1vanGWqYTmuBodueUHGPUsbxgn73AroNwpEBHwPdhXUswzmvCzquiqtcHC
package main
import (
"encoding/hex"
"flag"
"fmt"
"log"
"os"
"strings"
"syscall"
"github.com/mavryk-network/mvgo/mavryk"
"golang.org/x/term"
)
var (
flags = flag.NewFlagSet("key", flag.ContinueOnError)
verbose bool
password string
)
func init() {
flags.Usage = func() {}
flags.BoolVar(&verbose, "v", false, "be verbose")
flags.StringVar(&password, "password", "", "password for encrypted keys (may also use env TEZOS_KEY_PASSPHRASE)")
}
func main() {
if err := flags.Parse(os.Args[1:]); err != nil {
if err == flag.ErrHelp {
fmt.Println("Usage: key <cmd> [args]")
fmt.Println("\nCommands")
fmt.Printf(" gen <type> generate a new key of type\n")
fmt.Printf(" normal: edsk [mv1], spsk [mv2], p2sk [mv3]\n")
fmt.Printf(" encrypted: edesk, spesk, p2esk\n")
fmt.Printf(" info <key> prints info about `key`\n")
fmt.Printf(" encrypt <key> encrypt private `key`\n")
fmt.Printf(" sign <sk> <msg> [generic] sign blake2b hash of message `msg` with key\n")
fmt.Printf(" outputs typed signature by default\n")
fmt.Printf(" use `generic` to create a generic signature\n")
fmt.Printf(" sign-digest <sk> <digest> [generic] sign blake2b digest with key\n")
fmt.Printf(" outputs typed signature by default\n")
fmt.Printf(" use `generic` to create a generic signature\n")
fmt.Printf(" verify <pk> <sig> <msg> verify signature `sig` using pubkey `pk` against blake2b hash of message `msg`\n")
flags.PrintDefaults()
os.Exit(0)
}
log.Fatalln("Error:", err)
}
if err := run(); err != nil {
log.Fatalln("Error:", err)
}
}
func run() error {
n := flags.NArg()
if n < 1 {
return fmt.Errorf("Command required")
}
switch cmd := flags.Arg(0); cmd {
case "info":
if n != 2 {
return fmt.Errorf("Missing key")
}
return info(flags.Arg(1))
case "gen":
if n != 2 {
return fmt.Errorf("Missing key type")
}
return gen(flags.Arg(1))
case "encrypt":
if n != 2 {
return fmt.Errorf("Missing key")
}
return encrypt(flags.Arg(1))
case "sign":
if n < 3 {
return fmt.Errorf("Missing arguments")
}
generic := n == 4 && flags.Arg(3) == "generic"
return sign(flags.Arg(1), flags.Arg(2), generic)
case "sign-digest":
if n < 3 {
return fmt.Errorf("Missing arguments")
}
generic := n == 4 && flags.Arg(3) == "generic"
return signDigest(flags.Arg(1), flags.Arg(2), generic)
case "verify":
if n < 4 {
return fmt.Errorf("Missing arguments")
}
return verify(flags.Arg(1), flags.Arg(2), flags.Arg(3))
default:
return fmt.Errorf("Unknown command %q", cmd)
}
}
func readPassword() mavryk.PassphraseFunc {
pwd := password
source := "command line"
if pwd == "" {
pwd = os.Getenv("TEZOS_KEY_PASSPHRASE")
source = "env TEZOS_KEY_PASSPHRASE"
}
if pwd != "" {
fmt.Printf("Using password from %s %s", source, strings.Repeat("*", len(pwd)))
return func() ([]byte, error) { return []byte(pwd), nil }
} else {
return func() ([]byte, error) {
fmt.Print("Enter Password: ")
buf, err := term.ReadPassword(int(syscall.Stdin))
fmt.Println()
return buf, err
}
}
}
func info(val string) error {
if mavryk.IsPrivateKey(val) {
var (
sk mavryk.PrivateKey
err error
)
if mavryk.IsEncryptedKey(val) {
sk, err = mavryk.ParseEncryptedPrivateKey(val, readPassword())
} else {
sk, err = mavryk.ParsePrivateKey(val)
}
if err != nil {
return err
}
if !sk.IsValid() {
return fmt.Errorf("Invalid private key")
}
pk := sk.Public()
if !pk.IsValid() {
return fmt.Errorf("Invalid public key")
}
fmt.Printf("Key Type %s\n", sk.Type)
fmt.Printf("Private Key %s\n", sk)
fmt.Printf("Public Key %s\n", pk)
fmt.Printf("Address %s\n", pk.Address())
fmt.Printf("Private Key Hex %x (%d)\n", sk.Data, len(sk.Data))
fmt.Printf("Public Key Hex %x (%d)\n", pk.Data, len(pk.Data))
} else if mavryk.IsPublicKey(val) {
pk, err := mavryk.ParseKey(val)
if err != nil {
return err
}
if !pk.IsValid() {
return fmt.Errorf("Invalid public key")
}
fmt.Printf("Key Type %s\n", pk.Type)
fmt.Printf("Public Key %s\n", pk)
fmt.Printf("Public Key Hex %x (%d)\n", pk.Data, len(pk.Data))
fmt.Printf("Address %s\n", pk.Address())
} else if mavryk.IsSignature(val) {
sig, err := mavryk.ParseSignature(val)
if err != nil {
return err
}
if !sig.IsValid() {
return fmt.Errorf("Invalid signature")
}
fmt.Printf("Sig Type %s\n", sig.Type)
fmt.Printf("Sig Hex %x (%d)\n", sig.Data, len(sig.Data))
}
return nil
}
func gen(val string) error {
if !mavryk.IsPrivateKey(val) {
return fmt.Errorf("unsupported private key type")
}
typ, doEncrypt := mavryk.ParseKeyType(val)
if !typ.IsValid() {
return fmt.Errorf("invalid private key type")
}
sk, err := mavryk.GenerateKey(typ)
if err != nil {
return err
}
pk := sk.Public()
fmt.Printf("Key Type %s\n", sk.Type.SkPrefix())
fmt.Printf("Private Key %s\n", sk)
fmt.Printf("Public Key %s\n", pk)
fmt.Printf("Address %s\n", pk.Address())
fmt.Printf("Private Key Hex %x (%d)\n", sk.Data, len(sk.Data))
fmt.Printf("Public Key Hex %x (%d)\n", pk.Data, len(pk.Data))
if doEncrypt {
enc, err := sk.Encrypt(readPassword())
if err != nil {
return err
}
fmt.Printf("Encrypted Key %s\n", enc)
}
return nil
}
func encrypt(key string) error {
if !mavryk.IsPrivateKey(key) {
return fmt.Errorf("private key required")
}
sk, err := mavryk.ParseEncryptedPrivateKey(key, readPassword())
if err != nil {
return err
}
pk := sk.Public()
fmt.Printf("Key Type %s\n", sk.Type.SkPrefix())
fmt.Printf("Private Key %s\n", sk)
fmt.Printf("Public Key %s\n", pk)
fmt.Printf("Address %s\n", pk.Address())
fmt.Printf("Private Key Hex %x (%d)\n", sk.Data, len(sk.Data))
fmt.Printf("Public Key Hex %x (%d)\n", pk.Data, len(pk.Data))
enc, err := sk.Encrypt(readPassword())
if err != nil {
return err
}
fmt.Printf("Encrypted Key %s\n", enc)
return nil
}
func sign(key, msg string, generic bool) error {
sk, err := mavryk.ParseEncryptedPrivateKey(key, readPassword())
if err != nil {
return err
}
pk := sk.Public()
digest := mavryk.Digest([]byte(msg))
sig, err := sk.Sign(digest[:])
if err != nil {
return err
}
fmt.Printf("Key Type %s\n", sk.Type)
fmt.Printf("Private Key %s\n", sk)
fmt.Printf("Public Key %s\n", pk)
fmt.Printf("Address %s\n", pk.Address())
fmt.Printf("Msg digest %x\n", digest[:])
fmt.Printf("Signature %s\n", sig)
fmt.Printf("Signature Hex %x\n", sig.Data)
if generic {
fmt.Printf("Generic Sig %s\n", sig.Generic())
}
return nil
}
func signDigest(key, dgst string, generic bool) error {
sk, err := mavryk.ParseEncryptedPrivateKey(key, readPassword())
if err != nil {
return err
}
pk := sk.Public()
digest, err := hex.DecodeString(dgst)
if err != nil {
return err
}
sig, err := sk.Sign(digest[:])
if err != nil {
return err
}
fmt.Printf("Key Type %s\n", sk.Type)
fmt.Printf("Private Key %s\n", sk)
fmt.Printf("Public Key %s\n", pk)
fmt.Printf("Address %s\n", pk.Address())
fmt.Printf("Msg digest %x\n", digest[:])
fmt.Printf("Signature %s\n", sig)
fmt.Printf("Signature Hex %x\n", sig.Bytes())
if generic {
fmt.Printf("Generic Sig %s\n", sig.Generic())
}
return nil
}
func verify(key, sig, msg string) error {
pk, err := mavryk.ParseKey(key)
if err != nil {
return err
}
s, err := mavryk.ParseSignature(sig)
if err != nil {
return err
}
m := []byte(msg)
if strings.HasPrefix(msg, "0x") {
m, err = hex.DecodeString(msg)
if err != nil {
return err
}
}
digest := mavryk.Digest([]byte(m))
if err := pk.Verify(digest[:], s); err == nil {
fmt.Println("Signature OK")
} else {
return err
}
return nil
}