tor: move AddOnion to its own file
This commit is contained in:
Wilmer Paulino
parent
1467cd4dd3
commit
46f4da0b6b
149
tor/add_onion.go
Normal file
149
tor/add_onion.go
Normal file
@ -0,0 +1,149 @@
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package tor
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"os"
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)
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// OnionType denotes the type of the onion service.
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type OnionType int
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const (
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// V2 denotes that the onion service is V2.
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V2 OnionType = iota
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// V3 denotes that the onion service is V3.
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V3
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)
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// AddOnionConfig houses all of the required parameters in order to successfully
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// create a new onion service or restore an existing one.
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type AddOnionConfig struct {
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// Type denotes the type of the onion service that should be created.
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Type OnionType
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// VirtualPort is the externally reachable port of the onion address.
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VirtualPort int
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// TargetPorts is the set of ports that the service will be listening on
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// locally. The Tor server will use choose a random port from this set
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// to forward the traffic from the virtual port.
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//
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// NOTE: If nil/empty, the virtual port will be used as the only target
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// port.
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TargetPorts []int
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// PrivateKeyPath is the full path to where the onion service's private
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// key is stored. This can be used to restore an existing onion service.
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PrivateKeyPath string
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}
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// AddOnion creates an onion service and returns its onion address. Once
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// created, the new onion service will remain active until the connection
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// between the controller and the Tor server is closed.
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func (c *Controller) AddOnion(cfg AddOnionConfig) (*OnionAddr, error) {
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// Before sending the request to create an onion service to the Tor
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// server, we'll make sure that it supports V3 onion services if that
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// was the type requested.
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if cfg.Type == V3 {
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if err := supportsV3(c.version); err != nil {
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return nil, err
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}
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}
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// We'll start off by checking if the file containing the private key
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// exists. If it does not, then we should request the server to create
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// a new onion service and return its private key. Otherwise, we'll
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// request the server to recreate the onion server from our private key.
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var keyParam string
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if _, err := os.Stat(cfg.PrivateKeyPath); os.IsNotExist(err) {
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switch cfg.Type {
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case V2:
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keyParam = "NEW:RSA1024"
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case V3:
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keyParam = "NEW:ED25519-V3"
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}
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} else {
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privateKey, err := ioutil.ReadFile(cfg.PrivateKeyPath)
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if err != nil {
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return nil, err
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}
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keyParam = string(privateKey)
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}
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// Now, we'll create a mapping from the virtual port to each target
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// port. If no target ports were specified, we'll use the virtual port
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// to provide a one-to-one mapping.
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var portParam string
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// Helper function which appends the correct Port param depending on
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// whether the user chose to use a custom target IP address or not.
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pushPortParam := func(targetPort int) {
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if c.targetIPAddress == "" {
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portParam += fmt.Sprintf("Port=%d,%d ", cfg.VirtualPort,
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targetPort)
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} else {
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portParam += fmt.Sprintf("Port=%d,%s:%d ", cfg.VirtualPort,
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c.targetIPAddress, targetPort)
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}
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}
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if len(cfg.TargetPorts) == 0 {
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pushPortParam(cfg.VirtualPort)
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} else {
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for _, targetPort := range cfg.TargetPorts {
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pushPortParam(targetPort)
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}
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}
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// Send the command to create the onion service to the Tor server and
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// await its response.
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cmd := fmt.Sprintf("ADD_ONION %s %s", keyParam, portParam)
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_, reply, err := c.sendCommand(cmd)
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if err != nil {
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return nil, err
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}
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// If successful, the reply from the server should be of the following
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// format, depending on whether a private key has been requested:
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//
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// C: ADD_ONION RSA1024:[Blob Redacted] Port=80,8080
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// S: 250-ServiceID=testonion1234567
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// S: 250 OK
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//
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// C: ADD_ONION NEW:RSA1024 Port=80,8080
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// S: 250-ServiceID=testonion1234567
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// S: 250-PrivateKey=RSA1024:[Blob Redacted]
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// S: 250 OK
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//
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// We're interested in retrieving the service ID, which is the public
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// name of the service, and the private key if requested.
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replyParams := parseTorReply(reply)
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serviceID, ok := replyParams["ServiceID"]
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if !ok {
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return nil, errors.New("service id not found in reply")
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}
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// If a new onion service was created, we'll write its private key to
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// disk under strict permissions in the event that it needs to be
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// recreated later on.
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if privateKey, ok := replyParams["PrivateKey"]; ok {
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err := ioutil.WriteFile(
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cfg.PrivateKeyPath, []byte(privateKey), 0600,
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)
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if err != nil {
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return nil, fmt.Errorf("unable to write private key "+
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"to file: %v", err)
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}
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}
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// Finally, we'll return the onion address composed of the service ID,
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// along with the onion suffix, and the port this onion service can be
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// reached at externally.
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return &OnionAddr{
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OnionService: serviceID + ".onion",
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Port: cfg.VirtualPort,
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}, nil
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}
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@ -10,7 +10,6 @@ import (
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"fmt"
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"io/ioutil"
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"net/textproto"
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"os"
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"strconv"
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"strings"
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"sync/atomic"
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@ -403,144 +402,3 @@ func (c *Controller) ProtocolInfo() ([]string, string, string, error) {
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return authMethods, cookieFilePath, torVersion, nil
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}
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// OnionType denotes the type of the onion service.
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type OnionType int
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const (
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// V2 denotes that the onion service is V2.
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V2 OnionType = iota
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// V3 denotes that the onion service is V3.
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V3
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)
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// AddOnionConfig houses all of the required parameters in order to successfully
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// create a new onion service or restore an existing one.
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type AddOnionConfig struct {
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// Type denotes the type of the onion service that should be created.
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Type OnionType
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// VirtualPort is the externally reachable port of the onion address.
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VirtualPort int
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// TargetPorts is the set of ports that the service will be listening on
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// locally. The Tor server will use choose a random port from this set
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// to forward the traffic from the virtual port.
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//
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// NOTE: If nil/empty, the virtual port will be used as the only target
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// port.
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TargetPorts []int
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// PrivateKeyPath is the full path to where the onion service's private
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// key is stored. This can be used to restore an existing onion service.
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PrivateKeyPath string
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}
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// AddOnion creates an onion service and returns its onion address. Once
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// created, the new onion service will remain active until the connection
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// between the controller and the Tor server is closed.
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func (c *Controller) AddOnion(cfg AddOnionConfig) (*OnionAddr, error) {
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// Before sending the request to create an onion service to the Tor
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// server, we'll make sure that it supports V3 onion services if that
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// was the type requested.
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if cfg.Type == V3 {
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if err := supportsV3(c.version); err != nil {
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return nil, err
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}
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}
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// We'll start off by checking if the file containing the private key
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// exists. If it does not, then we should request the server to create
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// a new onion service and return its private key. Otherwise, we'll
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// request the server to recreate the onion server from our private key.
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var keyParam string
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if _, err := os.Stat(cfg.PrivateKeyPath); os.IsNotExist(err) {
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switch cfg.Type {
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case V2:
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keyParam = "NEW:RSA1024"
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case V3:
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keyParam = "NEW:ED25519-V3"
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}
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} else {
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privateKey, err := ioutil.ReadFile(cfg.PrivateKeyPath)
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if err != nil {
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return nil, err
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}
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keyParam = string(privateKey)
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}
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// Now, we'll create a mapping from the virtual port to each target
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// port. If no target ports were specified, we'll use the virtual port
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// to provide a one-to-one mapping.
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var portParam string
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// Helper function which appends the correct Port param depending on
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// whether the user chose to use a custom target IP address or not.
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pushPortParam := func(targetPort int) {
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if c.targetIPAddress == "" {
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portParam += fmt.Sprintf("Port=%d,%d ", cfg.VirtualPort,
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targetPort)
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} else {
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portParam += fmt.Sprintf("Port=%d,%s:%d ", cfg.VirtualPort,
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c.targetIPAddress, targetPort)
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}
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}
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if len(cfg.TargetPorts) == 0 {
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pushPortParam(cfg.VirtualPort)
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} else {
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for _, targetPort := range cfg.TargetPorts {
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pushPortParam(targetPort)
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}
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}
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// Send the command to create the onion service to the Tor server and
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// await its response.
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cmd := fmt.Sprintf("ADD_ONION %s %s", keyParam, portParam)
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_, reply, err := c.sendCommand(cmd)
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if err != nil {
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return nil, err
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}
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// If successful, the reply from the server should be of the following
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// format, depending on whether a private key has been requested:
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//
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// C: ADD_ONION RSA1024:[Blob Redacted] Port=80,8080
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// S: 250-ServiceID=testonion1234567
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// S: 250 OK
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//
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// C: ADD_ONION NEW:RSA1024 Port=80,8080
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// S: 250-ServiceID=testonion1234567
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// S: 250-PrivateKey=RSA1024:[Blob Redacted]
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// S: 250 OK
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//
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// We're interested in retrieving the service ID, which is the public
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// name of the service, and the private key if requested.
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replyParams := parseTorReply(reply)
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serviceID, ok := replyParams["ServiceID"]
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if !ok {
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return nil, errors.New("service id not found in reply")
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}
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// If a new onion service was created, we'll write its private key to
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// disk under strict permissions in the event that it needs to be
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// recreated later on.
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if privateKey, ok := replyParams["PrivateKey"]; ok {
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err := ioutil.WriteFile(
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cfg.PrivateKeyPath, []byte(privateKey), 0600,
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)
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if err != nil {
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return nil, fmt.Errorf("unable to write private key "+
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"to file: %v", err)
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}
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}
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// Finally, we'll return the onion address composed of the service ID,
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// along with the onion suffix, and the port this onion service can be
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// reached at externally.
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return &OnionAddr{
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OnionService: serviceID + ".onion",
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Port: cfg.VirtualPort,
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}, nil
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}
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