Golang objects.Hash類代碼示例

// Get Encrypted Public Key from database.
func GetPubkey(log chan string, addrHash objects.Hash) *objects.EncryptedPubkey {
	mutex.Lock()
	defer mutex.Unlock()

	hash := addrHash.GetBytes()

	if hashList == nil || dbConn == nil {
		return nil
	}
	if hashList[string(hash)] != PUBKEY {
		return nil
	}

	for s, err := dbConn.Query("SELECT payload FROM pubkey WHERE hash=?", hash); err == nil; err = s.Next() {
		var payload []byte
		s.Scan(&payload) // Assigns 1st column to rowid, the rest to row
		pub := new(objects.EncryptedPubkey)
		pub.AddrHash = addrHash
		copy(pub.IV[:], payload[:16])
		pub.Payload = payload[16:]
		return pub
	}
	// Not Found
	return nil
}

// Add Purge Token to database, and remove corresponding message if necessary.
func AddPurge(log chan string, p objects.Purge) error {
	mutex.Lock()
	defer mutex.Unlock()

	txid := p.GetBytes()
	hashArr := sha512.Sum384(txid)
	hash := hashArr[:]

	if hashList == nil || dbConn == nil {
		return DBError(EUNINIT)
	}
	hashObj := new(objects.Hash)
	hashObj.FromBytes(hash)

	if Contains(*hashObj) == PURGE {
		return nil
	}

	err := dbConn.Exec("INSERT INTO purge VALUES (?, ?)", hash, txid)
	if err != nil {
		log <- fmt.Sprintf("Error inserting purge into db... %s", err)
		return err
	}

	Add(*hashObj, PURGE)
	return nil
}

// Get basic message from database.
func GetMessage(log chan string, txidHash objects.Hash) *objects.Message {
	mutex.Lock()
	defer mutex.Unlock()

	hash := txidHash.GetBytes()

	if hashList == nil || dbConn == nil {
		return nil
	}
	if hashList[string(hash)] != MSG && hashList[string(hash)] != PUB {
		return nil
	}

	msg := new(objects.Message)

	for s, err := dbConn.Query("SELECT * FROM msg WHERE hash=?", hash); err == nil; err = s.Next() {
		var timestamp int64
		encrypted := make([]byte, 0, 0)
		txidhash := make([]byte, 0, 0)
		addrhash := make([]byte, 0, 0)
		s.Scan(&txidhash, &addrhash, &timestamp, &encrypted)

		msg.TxidHash.FromBytes(txidhash)
		msg.AddrHash.FromBytes(addrhash)
		msg.Timestamp = time.Unix(timestamp, 0)
		msg.Content.FromBytes(encrypted)

		return msg
	}
	// Not Found
	return nil
}

// Remove any object from the database and hash list.
func RemoveHash(log chan string, hashObj objects.Hash) error {
	mutex.Lock()
	defer mutex.Unlock()

	hash := hashObj.GetBytes()

	if hashList == nil || dbConn == nil {
		return DBError(EUNINIT)
	}

	var sql string

	switch Contains(hashObj) {
	case PUBKEY:
		sql = "DELETE FROM pubkey WHERE hash=?"
	case MSG:
		sql = "DELETE FROM msg WHERE hash=?"
	case PURGE:
		sql = "DELETE FROM purge WHERE hash=?"
	default:
		return nil
	}

	err := dbConn.Exec(sql, hash)
	if err != nil {
		log <- fmt.Sprintf("Error deleting hash from db... %s", err)
		return nil
	}

	Delete(hashObj)
	return nil
}

func DeleteAddress(addrHash *objects.Hash) error {
	localMutex.Lock()
	defer localMutex.Unlock()

	if Contains(*addrHash) > ADDRESS {
		return errors.New("Error Deleting Message: Not Found!")
	}

	return LocalDB.Exec("DELETE FROM addressbook WHERE hash=?", addrHash.GetBytes())
}

func DeleteMessage(txidHash *objects.Hash) error {
	localMutex.Lock()
	defer localMutex.Unlock()

	if Contains(*txidHash) > SENDBOX {
		return errors.New("Error Deleting Message: Not Found!")
	}

	return LocalDB.Exec("DELETE FROM msg WHERE txid_hash=?", txidHash.GetBytes())
}

// Get type of object in Hash List
func Contains(hashObj objects.Hash) int {
	hash := string(hashObj.GetBytes())
	if hashList != nil {
		hashType, ok := hashList[hash]
		if ok {
			return hashType
		} else {
			return NOTFOUND
		}
	}
	return NOTFOUND
}

// List of all hashes in the hash list.
func ObjList() *objects.Obj {
	if hashList == nil {
		return nil
	}

	ret := new(objects.Obj)
	ret.HashList = make([]objects.Hash, 0, 0)

	hash := new(objects.Hash)

	for key, _ := range hashList {
		hash.FromBytes([]byte(key))
		ret.HashList = append(ret.HashList, *hash)
	}
	return ret
}

func (service *EMPService) GetEncrypted(r *http.Request, args *[]byte, reply *encryption.EncryptedMessage) error {
	if !basicAuth(service.Config, r) {
		service.Config.Log <- fmt.Sprintf("Unauthorized RPC Request from: %s", r.RemoteAddr)
		return errors.New("Unauthorized")
	}

	var txidHash objects.Hash
	txidHash.FromBytes(*args)

	// Get Message from Database
	msg, err := localdb.GetMessageDetail(txidHash)
	if err != nil {
		return err
	}

	*reply = *msg.Encrypted
	return nil
}

func GetMessageDetail(txidHash objects.Hash) (*objects.FullMessage, error) {
	localMutex.Lock()
	defer localMutex.Unlock()

	if Contains(txidHash) > SENDBOX {
		return nil, errors.New("Message not found!")
	}

	ret := new(objects.FullMessage)
	ret.Encrypted = new(encryption.EncryptedMessage)
	ret.Decrypted = new(objects.DecryptedMessage)

	s, err := LocalDB.Query("SELECT * FROM msg WHERE txid_hash=?", txidHash.GetBytes())
	if err == nil {
		recipient := make([]byte, 0, 0)
		sender := make([]byte, 0, 0)
		encrypted := make([]byte, 0, 0)
		decrypted := make([]byte, 0, 0)
		txidHash := make([]byte, 0, 0)
		var timestamp int64
		var purged bool
		var box int

		s.Scan(&txidHash, &recipient, &timestamp, &box, &encrypted, &decrypted, &purged, &sender)
		ret.MetaMessage.TxidHash.FromBytes(txidHash)
		ret.MetaMessage.Recipient = encryption.AddressToString(recipient)
		ret.MetaMessage.Sender = encryption.AddressToString(sender)
		ret.MetaMessage.Timestamp = time.Unix(timestamp, 0)
		ret.MetaMessage.Purged = purged
		ret.Encrypted.FromBytes(encrypted)
		if len(decrypted) > 0 {
			ret.Decrypted.FromBytes(decrypted)
		} else {
			ret.Decrypted = nil
		}
		return ret, nil
	}

	return nil, err

}

func DeleteObject(obj objects.Hash) error {
	var err error
	switch Contains(obj) {
	case INBOX:
		fallthrough
	case SENDBOX:
		fallthrough
	case OUTBOX:
		err = LocalDB.Exec("DELETE FROM msg WHERE txid_hash=?", obj.GetBytes())
	case ADDRESS:
		err = LocalDB.Exec("DELETE FROM addressbook WHERE hash=?", obj.GetBytes())
	default:
		err = errors.New("Hash not found!")
	}

	if err == nil {
		Del(obj)
	}

	return err
}

// Get purge token from the database.
func GetPurge(log chan string, txidHash objects.Hash) *objects.Purge {
	mutex.Lock()
	defer mutex.Unlock()

	hash := txidHash.GetBytes()

	if hashList == nil || dbConn == nil {
		return nil
	}
	if hashList[string(hash)] != PURGE {
		return nil
	}

	for s, err := dbConn.Query("SELECT txid FROM purge WHERE hash=?", hash); err == nil; err = s.Next() {
		var txid []byte
		s.Scan(&txid) // Assigns 1st column to rowid, the rest to row
		p := new(objects.Purge)
		p.FromBytes(txid)
		return p
	}
	// Not Found
	return nil
}

func (service *EMPService) DeleteMessage(r *http.Request, args *[]byte, reply *NilParam) error {
	txidHash := new(objects.Hash)
	txidHash.FromBytes(*args)

	return localdb.DeleteMessage(txidHash)
}

// Delete hash from Hash List
func Del(hashObj objects.Hash) {
	hash := string(hashObj.GetBytes())
	if hashList != nil {
		delete(hashList, hash)
	}
}

// Add to global Hash List.
func Add(hashObj objects.Hash, hashType int) {
	hash := string(hashObj.GetBytes())
	if hashList != nil {
		hashList[hash] = hashType
	}
}