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// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"fmt"
"io"
"os"
"github.com/algorand/go-algorand/crypto"
"github.com/algorand/go-algorand/crypto/passphrase"
)
const (
stdoutFilenameValue = "-"
stdinFileNameValue = "-"
)
func loadKeyfileOrMnemonic(keyfile string, mnemonic string) crypto.Seed {
if keyfile != "" && mnemonic != "" {
fmt.Fprintf(os.Stderr, "Cannot specify both keyfile and mnemonic\n")
os.Exit(1)
}
if keyfile != "" {
return loadKeyfile(keyfile)
}
if mnemonic != "" {
return loadMnemonic(mnemonic)
}
fmt.Fprintf(os.Stderr, "Must specify one of keyfile or mnemonic\n")
os.Exit(1)
panic("unreachable")
}
func loadMnemonic(mnemonic string) crypto.Seed {
seedbytes, err := passphrase.MnemonicToKey(mnemonic)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot recover key seed from mnemonic: %v\n", err)
os.Exit(1)
}
var seed crypto.Seed
copy(seed[:], seedbytes)
return seed
}
func loadKeyfile(keyfile string) crypto.Seed {
seedbytes, err := os.ReadFile(keyfile)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot read key seed from %s: %v\n", keyfile, err)
os.Exit(1)
}
var seed crypto.Seed
copy(seed[:], seedbytes)
return seed
}
func writePrivateKey(keyfile string, seed crypto.Seed) {
err := os.WriteFile(keyfile, seed[:], 0600)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot write key to %s: %v\n", keyfile, err)
os.Exit(1)
}
}
func writePublicKey(pubkeyfile string, checksummed string) {
data := fmt.Sprintf("%s\n", checksummed)
err := os.WriteFile(pubkeyfile, []byte(data), 0666)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot write public key to %s: %v\n", pubkeyfile, err)
os.Exit(1)
}
}
func computeMnemonic(seed crypto.Seed) string {
mnemonic, err := passphrase.KeyToMnemonic(seed[:])
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot generate key mnemonic: %v\n", err)
os.Exit(1)
}
return mnemonic
}
// writeFile is a wrapper of os.WriteFile which considers the special
// case of stdout filename
func writeFile(filename string, data []byte, perm os.FileMode) error {
var err error
if filename == stdoutFilenameValue {
// Write to Stdout
if _, err = os.Stdout.Write(data); err != nil {
return err
}
return nil
}
return os.WriteFile(filename, data, perm)
}
// readFile is a wrapper of os.ReadFile which considers the
// special case of stdin filename
func readFile(filename string) ([]byte, error) {
if filename == stdinFileNameValue {
return io.ReadAll(os.Stdin)
}
return os.ReadFile(filename)
}
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