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private_account.go
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private_account.go
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// Copyright 2017 Monax Industries Limited
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package account
import (
"fmt"
"github.com/hyperledger/burrow/crypto"
)
type AddressableSigner interface {
Addressable
crypto.Signer
}
type PrivateAccount interface {
AddressableSigner
PrivateKey() crypto.PrivateKey
}
//
type ConcretePrivateAccount struct {
Address crypto.Address
PublicKey crypto.PublicKey
PrivateKey crypto.PrivateKey
}
type concretePrivateAccountWrapper struct {
*ConcretePrivateAccount `json:"unwrap"`
}
var _ PrivateAccount = concretePrivateAccountWrapper{}
func AsConcretePrivateAccount(privateAccount PrivateAccount) *ConcretePrivateAccount {
if privateAccount == nil {
return nil
}
// Avoid a copy
if ca, ok := privateAccount.(concretePrivateAccountWrapper); ok {
return ca.ConcretePrivateAccount
}
return &ConcretePrivateAccount{
Address: privateAccount.Address(),
PublicKey: privateAccount.PublicKey(),
PrivateKey: privateAccount.PrivateKey(),
}
}
func (cpaw concretePrivateAccountWrapper) Address() crypto.Address {
return cpaw.ConcretePrivateAccount.Address
}
func (cpaw concretePrivateAccountWrapper) PublicKey() crypto.PublicKey {
return cpaw.ConcretePrivateAccount.PublicKey
}
func (cpaw concretePrivateAccountWrapper) PrivateKey() crypto.PrivateKey {
return cpaw.ConcretePrivateAccount.PrivateKey
}
func (cpaw concretePrivateAccountWrapper) String() string {
return cpaw.ConcretePrivateAccount.String()
}
// ConcretePrivateAccount
func (pa ConcretePrivateAccount) PrivateAccount() PrivateAccount {
return concretePrivateAccountWrapper{ConcretePrivateAccount: &pa}
}
func (pa ConcretePrivateAccount) Sign(msg []byte) (crypto.Signature, error) {
return pa.PrivateKey.Sign(msg)
}
func (pa *ConcretePrivateAccount) String() string {
return fmt.Sprintf("ConcretePrivateAccount{%s}", pa.Address)
}
// Convert slice of ConcretePrivateAccounts to slice of SigningAccounts
func SigningAccounts(concretePrivateAccounts []*ConcretePrivateAccount) []AddressableSigner {
signingAccounts := make([]AddressableSigner, len(concretePrivateAccounts))
for i, cpa := range concretePrivateAccounts {
signingAccounts[i] = cpa.PrivateAccount()
}
return signingAccounts
}
// Generates a new account with private key.
func GeneratePrivateAccount() (PrivateAccount, error) {
privateKey, err := crypto.GeneratePrivateKey(nil, crypto.CurveTypeEd25519)
if err != nil {
return nil, err
}
publicKey := privateKey.GetPublicKey()
return ConcretePrivateAccount{
Address: publicKey.Address(),
PublicKey: publicKey,
PrivateKey: privateKey,
}.PrivateAccount(), nil
}
// Generates a new account with private key from SHA256 hash of a secret
func GeneratePrivateAccountFromSecret(secret string) PrivateAccount {
privateKey := crypto.PrivateKeyFromSecret(secret, crypto.CurveTypeEd25519)
publicKey := privateKey.GetPublicKey()
return ConcretePrivateAccount{
Address: publicKey.Address(),
PublicKey: publicKey,
PrivateKey: privateKey,
}.PrivateAccount()
}
func GeneratePrivateAccountFromPrivateKeyBytes(privKeyBytes []byte) (PrivateAccount, error) {
privateKey, err := crypto.PrivateKeyFromRawBytes(privKeyBytes, crypto.CurveTypeEd25519)
if err != nil {
return nil, err
}
publicKey := privateKey.GetPublicKey()
return ConcretePrivateAccount{
Address: publicKey.Address(),
PublicKey: publicKey,
PrivateKey: privateKey,
}.PrivateAccount(), nil
}