コード例 #1
0
ファイル: address.go プロジェクト: conseweb/stcwallet
// PrivKey returns the private key for the address.  It can fail if the address
// manager is watching-only or locked, or the address does not have any keys.
//
// This is part of the ManagedPubKeyAddress interface implementation.
func (a *managedAddress) PrivKey() (*btcec.PrivateKey, error) {
	// No private keys are available for a watching-only address manager.
	if a.manager.watchingOnly {
		return nil, managerError(ErrWatchingOnly, errWatchingOnly, nil)
	}

	a.manager.mtx.Lock()
	defer a.manager.mtx.Unlock()

	// Account manager must be unlocked to decrypt the private key.
	if a.manager.locked {
		return nil, managerError(ErrLocked, errLocked, nil)
	}

	// Decrypt the key as needed.  Also, make sure it's a copy since the
	// private key stored in memory can be cleared at any time.  Otherwise
	// the returned private key could be invalidated from under the caller.
	privKeyCopy, err := a.unlock(a.manager.cryptoKeyPriv)
	if err != nil {
		return nil, err
	}

	privKey, _ := btcec.PrivKeyFromBytes(btcec.S256(), privKeyCopy)
	zero.Bytes(privKeyCopy)
	return privKey, nil
}
コード例 #2
0
ファイル: address.go プロジェクト: conseweb/stcwallet
// lock zeroes the associated clear text private key.
func (a *scriptAddress) lock() {
	// Zero and nil the clear text script associated with this address.
	a.scriptMutex.Lock()
	zero.Bytes(a.scriptCT)
	a.scriptCT = nil
	a.scriptMutex.Unlock()
}
コード例 #3
0
ファイル: address.go プロジェクト: conseweb/stcwallet
// lock zeroes the associated clear text private key.
func (a *managedAddress) lock() {
	// Zero and nil the clear text private key associated with this
	// address.
	a.privKeyMutex.Lock()
	zero.Bytes(a.privKeyCT)
	a.privKeyCT = nil
	a.privKeyMutex.Unlock()
}
コード例 #4
0
ファイル: pool.go プロジェクト: conseweb/stcwallet
// decryptExtendedKey uses Manager.Decrypt() to decrypt the encrypted byte slice and return
// an extended (public or private) key representing it.
//
// This method must be called with the Pool's manager unlocked.
func (p *Pool) decryptExtendedKey(keyType waddrmgr.CryptoKeyType, encrypted []byte) (*hdkeychain.ExtendedKey, error) {
	decrypted, err := p.manager.Decrypt(keyType, encrypted)
	if err != nil {
		str := fmt.Sprintf("cannot decrypt key %v", encrypted)
		return nil, newError(ErrCrypto, str, err)
	}
	result, err := hdkeychain.NewKeyFromString(string(decrypted))
	zero.Bytes(decrypted)
	if err != nil {
		str := fmt.Sprintf("cannot get key from string %v", decrypted)
		return nil, newError(ErrKeyChain, str, err)
	}
	return result, nil
}
コード例 #5
0
ファイル: snacl.go プロジェクト: conseweb/stcwallet
// deriveKey fills out the Key field.
func (sk *SecretKey) deriveKey(password *[]byte) error {
	key, err := scrypt.Key(*password, sk.Parameters.Salt[:],
		sk.Parameters.N,
		sk.Parameters.R,
		sk.Parameters.P,
		len(sk.Key))
	if err != nil {
		return err
	}
	copy(sk.Key[:], key)
	zero.Bytes(key)

	// I'm not a fan of forced garbage collections, but scrypt allocates a
	// ton of memory and calling it back to back without a GC cycle in
	// between means you end up needing twice the amount of memory.  For
	// example, if your scrypt parameters are such that you require 1GB and
	// you call it twice in a row, without this you end up allocating 2GB
	// since the first GB probably hasn't been released yet.
	debug.FreeOSMemory()

	return nil
}