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privatekey.go
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privatekey.go
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// Copyright (C) 2018 MediBloc
//
// This program 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.
//
// This program 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 this program. If not, see <https://www.gnu.org/licenses/>
package secp256k1
import (
"crypto/ecdsa"
"github.com/medibloc/go-medibloc/crypto/signature"
"github.com/medibloc/go-medibloc/crypto/signature/algorithm"
)
// PrivateKey ecdsa privatekey
type PrivateKey struct {
privateKey *ecdsa.PrivateKey
}
// NewPrivateKey new a private key with ecdsa.PrivateKey
func NewPrivateKey(key *ecdsa.PrivateKey) *PrivateKey {
priv := new(PrivateKey)
priv.privateKey = key
return priv
}
// GeneratePrivateKey generate a new private key
func GeneratePrivateKey() *PrivateKey {
priv := new(PrivateKey)
ECDSA := NewECDSAPrivateKey()
priv.privateKey = ECDSA
return priv
}
// NewPrivateKeyFromHex gets new private key from hex string.
func NewPrivateKeyFromHex(b string) (*PrivateKey, error) {
ecdsaKey, err := HexToECDSA(b)
if err != nil {
return nil, err
}
privKey := NewPrivateKey(ecdsaKey)
return privKey, nil
}
// Algorithm returns algorithm name.
func (k *PrivateKey) Algorithm() algorithm.CryptoAlgorithm {
return algorithm.SECP256K1
}
// Encoded encodes to bytes.
func (k *PrivateKey) Encoded() ([]byte, error) {
return FromECDSAPrivateKey(k.privateKey), nil
}
// Decode decode data to key.
func (k *PrivateKey) Decode(b []byte) error {
priv, err := ToECDSAPrivateKey(b)
if err != nil {
return err
}
k.privateKey = priv
return nil
}
// Clear clear key content.
func (k *PrivateKey) Clear() {
zeroKey(k.privateKey)
}
// PublicKey returns public key.
func (k *PrivateKey) PublicKey() signature.PublicKey {
return NewPublicKey(k.privateKey.PublicKey)
}
// Sign sing bytes with private key.
func (k *PrivateKey) Sign(msg []byte) ([]byte, error) {
return Sign(msg, FromECDSAPrivateKey(k.privateKey))
}