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ed25519.go
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ed25519.go
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// Copyright (C) 2018 go-gamc authors
//
// This file is part of the go-gamc library.
//
// the go-gamc library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// the go-gamc library 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with the go-gamc library. If not, see <http://www.gnu.org/licenses/>.
//
package ed25519
import "C"
import (
"errors"
"golang.org/x/crypto/ed25519"
)
var ( // ErrGetPublicKeyFailed private key to public failed
ErrGetPublicKeyFailed = errors.New("private key to public failed")
ErrGetSeedFailed = errors.New("private key to seed failed")
)
// GetPublicKey private key to public key
func GetPublicKey(prikey []byte) ([]byte, error) {
if len(prikey) != ed25519.PrivateKeySize {
return nil, ErrGetPublicKeyFailed
}
publicKey := make([]byte, ed25519.PublicKeySize)
copy(publicKey, prikey[32:])
return publicKey, nil
}
func GetSeed(prikey []byte) ([]byte, error) {
if len(prikey) != ed25519.PrivateKeySize {
return nil, ErrGetSeedFailed
}
seed := make([]byte, ed25519.SeedSize)
copy(seed, prikey[:32])
return seed, nil
}
// Verify verify with public key
func Verify(pubKey []byte, message, sig []byte) bool {
return ed25519.Verify(pubKey, message, sig)
}
// Sign sign hash with private key
func Sign(priKey []byte, message []byte) []byte {
return ed25519.Sign(priKey, message)
}