fix(auth): use hashed secret as identity to verify token authenticity (…

…#384)

cmd/lk/cloud.go

@@ -246,7 +246,14 @@ func requireToken(_ context.Context, cmd *cli.Command) (*config.ProjectConfig, s
 		return nil, "", err
 	}
 
-	at := auth.NewAccessToken(cfg.APIKey, cfg.APISecret)
+	// construct a token from the chosen project, using the hashed secret as the identity
+	// as a means of preventing any old token generated with this key/secret pair from
+	// deleting it
+	hash, err := hashString(cfg.APISecret)
+	if err != nil {
+		return nil, "", err
+	}
+	at := auth.NewAccessToken(cfg.APIKey, cfg.APISecret).SetIdentity(hash)
 	token, err := at.ToJWT()
 	if err != nil {
 		return nil, "", err

cmd/lk/utils.go

@@ -15,6 +15,8 @@
 package main
 
 import (
+	"crypto/sha256"
+	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -149,6 +151,15 @@ func wrapWith(wrap string) func(string) string {
 	}
 }
 
+func hashString(str string) (string, error) {
+	hash := sha256.New()
+	if _, err := hash.Write([]byte(str)); err != nil {
+		return "", err
+	}
+	bytes := hash.Sum(nil)
+	return hex.EncodeToString(bytes), nil
+}
+
 func PrintJSON(obj any) {
 	txt, _ := json.MarshalIndent(obj, "", "  ")
 	fmt.Println(string(txt))