chore(tfstated): refactor helpers to their own package

pkg/helpers/crypto.go

@@ -0,0 +1,21 @@
+package helpers
+
+import (
+	"crypto/sha256"
+
+	"git.adyxax.org/adyxax/tfstated/pkg/scrypto"
+	"golang.org/x/crypto/pbkdf2"
+)
+
+const (
+	PBKDF2Iterations = 600000
+	SaltSize         = 32
+)
+
+func GenerateSalt() []byte {
+	return scrypto.RandomBytes(SaltSize)
+}
+
+func HashPassword(password string, salt []byte) []byte {
+	return pbkdf2.Key([]byte(password), salt, PBKDF2Iterations, 32, sha256.New)
+}