mirror of
https://github.com/gravitl/netmaker.git
synced 2024-11-14 05:40:50 +08:00
104 lines
2.6 KiB
Go
104 lines
2.6 KiB
Go
package mq
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import (
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"errors"
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"fmt"
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"strings"
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"time"
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"github.com/gravitl/netmaker/logic"
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"github.com/gravitl/netmaker/models"
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"github.com/gravitl/netmaker/netclient/ncutils"
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)
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func decryptMsgWithHost(host *models.Host, msg []byte) ([]byte, error) {
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if host.OS == models.OS_Types.IoT { // just pass along IoT messages
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return msg, nil
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}
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trafficKey, trafficErr := logic.RetrievePrivateTrafficKey() // get server private key
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if trafficErr != nil {
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return nil, trafficErr
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}
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serverPrivTKey, err := ncutils.ConvertBytesToKey(trafficKey)
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if err != nil {
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return nil, err
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}
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nodePubTKey, err := ncutils.ConvertBytesToKey(host.TrafficKeyPublic)
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if err != nil {
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return nil, err
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}
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return ncutils.DeChunk(msg, nodePubTKey, serverPrivTKey)
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}
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func decryptMsg(node *models.Node, msg []byte) ([]byte, error) {
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if len(msg) <= 24 { // make sure message is of appropriate length
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return nil, fmt.Errorf("recieved invalid message from broker %v", msg)
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}
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host, err := logic.GetHost(node.HostID.String())
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if err != nil {
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return nil, err
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}
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return decryptMsgWithHost(host, msg)
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}
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func encryptMsg(host *models.Host, msg []byte) ([]byte, error) {
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if host.OS == models.OS_Types.IoT {
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return msg, nil
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}
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// fetch server public key to be certain hasn't changed in transit
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trafficKey, trafficErr := logic.RetrievePrivateTrafficKey()
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if trafficErr != nil {
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return nil, trafficErr
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}
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serverPrivKey, err := ncutils.ConvertBytesToKey(trafficKey)
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if err != nil {
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return nil, err
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}
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nodePubKey, err := ncutils.ConvertBytesToKey(host.TrafficKeyPublic)
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if err != nil {
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return nil, err
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}
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if strings.Contains(host.Version, "0.10.0") {
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return ncutils.BoxEncrypt(msg, nodePubKey, serverPrivKey)
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}
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return ncutils.Chunk(msg, nodePubKey, serverPrivKey)
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}
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func publish(host *models.Host, dest string, msg []byte) error {
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encrypted, encryptErr := encryptMsg(host, msg)
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if encryptErr != nil {
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return encryptErr
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}
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if mqclient == nil {
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return errors.New("cannot publish ... mqclient not connected")
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}
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if token := mqclient.Publish(dest, 0, true, encrypted); !token.WaitTimeout(MQ_TIMEOUT*time.Second) || token.Error() != nil {
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var err error
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if token.Error() == nil {
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err = errors.New("connection timeout")
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} else {
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err = token.Error()
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}
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return err
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}
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return nil
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}
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// decodes a message queue topic and returns the embedded node.ID
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func getID(topic string) (string, error) {
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parts := strings.Split(topic, "/")
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count := len(parts)
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if count == 1 {
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return "", fmt.Errorf("invalid topic")
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}
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//the last part of the topic will be the node.ID
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return parts[count-1], nil
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}
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