chore(tfstated): refactor helpers to their own package

pkg/model/account.go

@@ -1,17 +1,10 @@
 package model
 
 import (
-	"crypto/sha256"
 	"crypto/subtle"
 	"time"
 
-	"git.adyxax.org/adyxax/tfstated/pkg/scrypto"
-	"golang.org/x/crypto/pbkdf2"
-)
-
-const (
-	PBKDF2Iterations = 600000
-	SaltSize         = 32
+	"git.adyxax.org/adyxax/tfstated/pkg/helpers"
 )
 
 type AccountContextKey struct{}
@@ -28,14 +21,6 @@ type Account struct {
 }
 
 func (account *Account) CheckPassword(password string) bool {
-	hash := HashPassword(password, account.Salt)
+	hash := helpers.HashPassword(password, account.Salt)
 	return subtle.ConstantTimeCompare(hash, account.PasswordHash) == 1
 }
-
-func GenerateSalt() []byte {
-	return scrypto.RandomBytes(SaltSize)
-}
-
-func HashPassword(password string, salt []byte) []byte {
-	return pbkdf2.Key([]byte(password), salt, PBKDF2Iterations, 32, sha256.New)
-}