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130 lines
2.8 KiB
130 lines
2.8 KiB
package ethcrypto
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import (
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"fmt"
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"sync"
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"github.com/ethereum/go-ethereum/ethutil"
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)
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type KeyManager struct {
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keyRing *KeyRing
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session string
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keyStore KeyStore // interface
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keyRings map[string]*KeyRing // cache
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keyPair *KeyPair
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}
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func NewDBKeyManager(db ethutil.Database) *KeyManager {
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return &KeyManager{keyStore: &DBKeyStore{db: db}, keyRings: make(map[string]*KeyRing)}
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}
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func NewFileKeyManager(basedir string) *KeyManager {
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return &KeyManager{keyStore: &FileKeyStore{basedir: basedir}, keyRings: make(map[string]*KeyRing)}
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}
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func (k *KeyManager) KeyPair() *KeyPair {
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return k.keyPair
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}
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func (k *KeyManager) KeyRing() *KeyPair {
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return k.keyPair
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}
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func (k *KeyManager) PrivateKey() []byte {
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return k.keyPair.PrivateKey
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}
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func (k *KeyManager) PublicKey() []byte {
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return k.keyPair.PublicKey
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}
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func (k *KeyManager) Address() []byte {
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return k.keyPair.Address()
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}
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func (k *KeyManager) save(session string, keyRing *KeyRing) error {
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err := k.keyStore.Save(session, keyRing)
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if err != nil {
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return err
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}
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k.keyRings[session] = keyRing
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return nil
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}
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func (k *KeyManager) load(session string) (*KeyRing, error) {
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keyRing, found := k.keyRings[session]
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if !found {
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var err error
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keyRing, err = k.keyStore.Load(session)
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if err != nil {
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return nil, err
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}
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}
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return keyRing, nil
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}
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func cursorError(cursor int, len int) error {
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return fmt.Errorf("cursor %d out of range (0..%d)", cursor, len)
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}
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func (k *KeyManager) reset(session string, cursor int, keyRing *KeyRing) error {
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if cursor >= keyRing.Len() {
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return cursorError(cursor, keyRing.Len())
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}
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lock := &sync.Mutex{}
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lock.Lock()
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defer lock.Unlock()
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err := k.save(session, keyRing)
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if err != nil {
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return err
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}
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k.session = session
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k.keyRing = keyRing
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k.keyPair = keyRing.GetKeyPair(cursor)
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return nil
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}
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func (k *KeyManager) SetCursor(cursor int) error {
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if cursor >= k.keyRing.Len() {
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return cursorError(cursor, k.keyRing.Len())
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}
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k.keyPair = k.keyRing.GetKeyPair(cursor)
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return nil
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}
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func (k *KeyManager) Init(session string, cursor int, force bool) error {
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var keyRing *KeyRing
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if !force {
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var err error
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keyRing, err = k.load(session)
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if err != nil {
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return err
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}
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}
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if keyRing == nil {
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keyRing = NewGeneratedKeyRing(1)
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}
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return k.reset(session, cursor, keyRing)
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}
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func (k *KeyManager) InitFromSecretsFile(session string, cursor int, secretsfile string) error {
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keyRing, err := NewKeyRingFromFile(secretsfile)
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if err != nil {
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return err
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}
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return k.reset(session, cursor, keyRing)
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}
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func (k *KeyManager) InitFromString(session string, cursor int, secrets string) error {
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keyRing, err := NewKeyRingFromString(secrets)
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if err != nil {
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return err
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}
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return k.reset(session, cursor, keyRing)
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}
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func (k *KeyManager) Export(dir string) error {
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fileKeyStore := FileKeyStore{dir}
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return fileKeyStore.Save(k.session, k.keyRing)
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}
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