From aeded3fb37f874555ce101a959dc52fcb0f10925 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20Schw=C3=B6rer?= <pubgit@mikescher.com>
Date: Sat, 24 Dec 2022 03:11:09 +0100
Subject: [PATCH] v0.0.53

---
 cryptext/passHash.go | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/cryptext/passHash.go b/cryptext/passHash.go
index 673c74d..379b2b8 100644
--- a/cryptext/passHash.go
+++ b/cryptext/passHash.go
@@ -245,6 +245,35 @@ func (ph PassHash) WithTOTP(totpSecret []byte) (PassHash, error) {
 	return "", errors.New("unknown version")
 }
 
+func (ph PassHash) Change(newPlainPass string) (PassHash, error) {
+	version, _, _, hastotp, totpsecret, valid := ph.Data()
+	if !valid {
+		return "", errors.New("invalid PassHash")
+	}
+
+	if version == 0 {
+		return HashPasswordV0(newPlainPass)
+	}
+
+	if version == 1 {
+		return HashPasswordV1(newPlainPass)
+	}
+
+	if version == 2 {
+		return HashPasswordV2(newPlainPass)
+	}
+
+	if version == 3 {
+		return HashPasswordV3(newPlainPass, langext.Conditional(hastotp, totpsecret, nil))
+	}
+
+	if version == 4 {
+		return HashPasswordV4(newPlainPass, langext.Conditional(hastotp, totpsecret, nil))
+	}
+
+	return "", errors.New("unknown version")
+}
+
 func (ph PassHash) String() string {
 	return string(ph)
 }