store passwords on disk using JSON instead of gob

storage/dir.go

@@ -1,7 +1,7 @@
 package storage
 
 import (
-	"encoding/gob"
+	"encoding/json"
 	"log"
 	"os"
 	"path"
@@ -20,6 +20,11 @@ type dir struct {
 	path string
 }
 
+type dirEntry struct {
+	Password  []byte    `json:"password"`
+	ExpiresAt time.Time `json:"expires-at"`
+}
+
 func (store *dir) Create(password []byte, expiresAt time.Time) (string, error) {
 	for range 1000 {
 		id := generateId(24)
@@ -39,12 +44,12 @@ func (store *dir) Create(password []byte, expiresAt time.Time) (string, error) {
 
 		defer file.Close()
 
-		entry := entry{
+		entry := dirEntry{
 			Password:  password,
 			ExpiresAt: expiresAt,
 		}
 
-		err = gob.NewEncoder(file).Encode(&entry)
+		err = json.NewEncoder(file).Encode(&entry)
 		if err != nil {
 			log.Printf("%s", err)
 			return "", err
@@ -72,8 +77,8 @@ func (store *dir) Get(id string) ([]byte, error) {
 
 	defer file.Close()
 
-	var entry entry
-	err = gob.NewDecoder(file).Decode(&entry)
+	var entry dirEntry
+	err = json.NewDecoder(file).Decode(&entry)
 	if err != nil {
 		return nil, err
 	}
@@ -113,8 +118,8 @@ func (store *dir) ClearExpired() error {
 
 		defer file.Close()
 
-		var entry entry
-		err = gob.NewDecoder(file).Decode(&entry)
+		var entry dirEntry
+		err = json.NewDecoder(file).Decode(&entry)
 		if err != nil {
 			return err
 		}

storage/ram.go

@@ -7,7 +7,7 @@ import (
 
 func NewRamStore() Store {
 	store := &ram{
-		passwords: make(map[string]entry),
+		passwords: make(map[string]ramEntry),
 		lock:      sync.Mutex{},
 	}
 
@@ -15,10 +15,15 @@ func NewRamStore() Store {
 }
 
 type ram struct {
-	passwords map[string]entry
+	passwords map[string]ramEntry
 	lock      sync.Mutex
 }
 
+type ramEntry struct {
+	Password  []byte
+	ExpiresAt time.Time
+}
+
 func (store *ram) Create(password []byte, expiresAt time.Time) (string, error) {
 	store.lock.Lock()
 	defer store.lock.Unlock()
@@ -30,7 +35,7 @@ func (store *ram) Create(password []byte, expiresAt time.Time) (string, error) {
 			continue
 		}
 
-		store.passwords[id] = entry{
+		store.passwords[id] = ramEntry{
 			Password:  password,
 			ExpiresAt: expiresAt,
 		}

storage/storage.go

@@ -14,11 +14,6 @@ var (
 	ErrFull     = errors.New("storage is filled")
 )
 
-type entry struct {
-	Password  []byte
-	ExpiresAt time.Time
-}
-
 type Store interface {
 	Create(password []byte, expiresAt time.Time) (string, error)
 	Get(id string) ([]byte, error)