mirror of https://github.com/lightninglabs/loop
Merge pull request #281 from guggero/macaroons
[2/3] loopd: add macaroon authentication to the loop RPC serverpull/294/head
Oliver Gugger
4 years ago
committed by
GitHub
commit
d638d07fe3
@ -0,0 +1,192 @@
|
||||
package loopd
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"io/ioutil"
|
||||
"os"
|
||||
|
||||
"github.com/lightningnetwork/lnd/lnrpc"
|
||||
"github.com/lightningnetwork/lnd/macaroons"
|
||||
"google.golang.org/grpc"
|
||||
"gopkg.in/macaroon-bakery.v2/bakery"
|
||||
)
|
||||
|
||||
const (
|
||||
// loopMacaroonLocation is the value we use for the loopd macaroons'
|
||||
// "Location" field when baking them.
|
||||
loopMacaroonLocation = "loop"
|
||||
)
|
||||
|
||||
var (
|
||||
// RequiredPermissions is a map of all loop RPC methods and their
|
||||
// required macaroon permissions to access loopd.
|
||||
RequiredPermissions = map[string][]bakery.Op{
|
||||
"/looprpc.SwapClient/LoopOut": {{
|
||||
Entity: "swap",
|
||||
Action: "execute",
|
||||
}, {
|
||||
Entity: "loop",
|
||||
Action: "out",
|
||||
}},
|
||||
"/looprpc.SwapClient/LoopIn": {{
|
||||
Entity: "swap",
|
||||
Action: "execute",
|
||||
}, {
|
||||
Entity: "loop",
|
||||
Action: "in",
|
||||
}},
|
||||
"/looprpc.SwapClient/Monitor": {{
|
||||
Entity: "swap",
|
||||
Action: "read",
|
||||
}},
|
||||
"/looprpc.SwapClient/ListSwaps": {{
|
||||
Entity: "swap",
|
||||
Action: "read",
|
||||
}},
|
||||
"/looprpc.SwapClient/SwapInfo": {{
|
||||
Entity: "swap",
|
||||
Action: "read",
|
||||
}},
|
||||
"/looprpc.SwapClient/LoopOutTerms": {{
|
||||
Entity: "terms",
|
||||
Action: "read",
|
||||
}, {
|
||||
Entity: "loop",
|
||||
Action: "out",
|
||||
}},
|
||||
"/looprpc.SwapClient/LoopOutQuote": {{
|
||||
Entity: "swap",
|
||||
Action: "read",
|
||||
}, {
|
||||
Entity: "loop",
|
||||
Action: "out",
|
||||
}},
|
||||
"/looprpc.SwapClient/GetLoopInTerms": {{
|
||||
Entity: "terms",
|
||||
Action: "read",
|
||||
}, {
|
||||
Entity: "loop",
|
||||
Action: "in",
|
||||
}},
|
||||
"/looprpc.SwapClient/GetLoopInQuote": {{
|
||||
Entity: "swap",
|
||||
Action: "read",
|
||||
}, {
|
||||
Entity: "loop",
|
||||
Action: "in",
|
||||
}},
|
||||
"/looprpc.SwapClient/GetLsatTokens": {{
|
||||
Entity: "auth",
|
||||
Action: "read",
|
||||
}},
|
||||
}
|
||||
|
||||
// allPermissions is the list of all existing permissions that exist
|
||||
// for loopd's RPC. The default macaroon that is created on startup
|
||||
// contains all these permissions and is therefore equivalent to lnd's
|
||||
// admin.macaroon but for loop.
|
||||
allPermissions = []bakery.Op{{
|
||||
Entity: "loop",
|
||||
Action: "out",
|
||||
}, {
|
||||
Entity: "loop",
|
||||
Action: "in",
|
||||
}, {
|
||||
Entity: "swap",
|
||||
Action: "execute",
|
||||
}, {
|
||||
Entity: "swap",
|
||||
Action: "read",
|
||||
}, {
|
||||
Entity: "terms",
|
||||
Action: "read",
|
||||
}, {
|
||||
Entity: "auth",
|
||||
Action: "read",
|
||||
}}
|
||||
|
||||
// macDbDefaultPw is the default encryption password used to encrypt the
|
||||
// loop macaroon database. The macaroon service requires us to set a
|
||||
// non-nil password so we set it to an empty string. This will cause the
|
||||
// keys to be encrypted on disk but won't provide any security at all as
|
||||
// the password is known to anyone.
|
||||
//
|
||||
// TODO(guggero): Allow the password to be specified by the user. Needs
|
||||
// create/unlock calls in the RPC. Using a password should be optional
|
||||
// though.
|
||||
macDbDefaultPw = []byte("")
|
||||
)
|
||||
|
||||
// startMacaroonService starts the macaroon validation service, creates or
|
||||
// unlocks the macaroon database and creates the default macaroon if it doesn't
|
||||
// exist yet. If macaroons are disabled in general in the configuration, none of
|
||||
// these actions are taken.
|
||||
func (d *Daemon) startMacaroonService() error {
|
||||
// Create the macaroon authentication/authorization service.
|
||||
var err error
|
||||
d.macaroonService, err = macaroons.NewService(
|
||||
d.cfg.DataDir, loopMacaroonLocation, macaroons.IPLockChecker,
|
||||
)
|
||||
if err != nil {
|
||||
return fmt.Errorf("unable to set up macaroon authentication: "+
|
||||
"%v", err)
|
||||
}
|
||||
|
||||
// Try to unlock the macaroon store with the private password.
|
||||
err = d.macaroonService.CreateUnlock(&macDbDefaultPw)
|
||||
if err != nil {
|
||||
return fmt.Errorf("unable to unlock macaroon DB: %v", err)
|
||||
}
|
||||
|
||||
// Create macaroon files for loop CLI to use if they don't exist.
|
||||
if !lnrpc.FileExists(d.cfg.MacaroonPath) {
|
||||
ctx := context.Background()
|
||||
|
||||
// We only generate one default macaroon that contains all
|
||||
// existing permissions (equivalent to the admin.macaroon in
|
||||
// lnd). Custom macaroons can be created through the bakery
|
||||
// RPC.
|
||||
loopMac, err := d.macaroonService.NewMacaroon(
|
||||
ctx, macaroons.DefaultRootKeyID,
|
||||
allPermissions...,
|
||||
)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
loopMacBytes, err := loopMac.M().MarshalBinary()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
err = ioutil.WriteFile(d.cfg.MacaroonPath, loopMacBytes, 0644)
|
||||
if err != nil {
|
||||
if err := os.Remove(d.cfg.MacaroonPath); err != nil {
|
||||
log.Errorf("Unable to remove %s: %v",
|
||||
d.cfg.MacaroonPath, err)
|
||||
}
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// stopMacaroonService closes the macaroon database.
|
||||
func (d *Daemon) stopMacaroonService() error {
|
||||
return d.macaroonService.Close()
|
||||
}
|
||||
|
||||
// macaroonInterceptor creates gRPC server options with the macaroon security
|
||||
// interceptors.
|
||||
func (d *Daemon) macaroonInterceptor() []grpc.ServerOption {
|
||||
unaryInterceptor := d.macaroonService.UnaryServerInterceptor(
|
||||
RequiredPermissions,
|
||||
)
|
||||
streamInterceptor := d.macaroonService.StreamServerInterceptor(
|
||||
RequiredPermissions,
|
||||
)
|
||||
return []grpc.ServerOption{
|
||||
grpc.UnaryInterceptor(unaryInterceptor),
|
||||
grpc.StreamInterceptor(streamInterceptor),
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue