Whenever the password is updated ensure that the hash algorithm is too (#13966)

`user.HashPassword` may potentially - and in fact now likely does - change
the `passwd_hash_algo` therefore whenever the `passwd` is updated, this
also needs to be updated.

Fix #13832

Thanks @fblaese for the hint

Signed-off-by: Andrew Thornton <art27@cantab.net>

cmd/admin.go

@@ -335,7 +335,7 @@ func runChangePassword(c *cli.Context) error {
 	}
 	user.HashPassword(c.String("password"))
 
-	if err := models.UpdateUserCols(user, "passwd", "salt"); err != nil {
+	if err := models.UpdateUserCols(user, "passwd", "passwd_hash_algo", "salt"); err != nil {
 		return err
 	}
 

routers/user/auth.go

@@ -1514,7 +1514,7 @@ func ResetPasswdPost(ctx *context.Context) {
 	}
 	u.HashPassword(passwd)
 	u.MustChangePassword = false
-	if err := models.UpdateUserCols(u, "must_change_password", "passwd", "rands", "salt"); err != nil {
+	if err := models.UpdateUserCols(u, "must_change_password", "passwd", "passwd_hash_algo", "rands", "salt"); err != nil {
 		ctx.ServerError("UpdateUser", err)
 		return
 	}
@@ -1590,7 +1590,7 @@ func MustChangePasswordPost(ctx *context.Context, cpt *captcha.Captcha, form aut
 	u.HashPassword(form.Password)
 	u.MustChangePassword = false
 
-	if err := models.UpdateUserCols(u, "must_change_password", "passwd", "salt"); err != nil {
+	if err := models.UpdateUserCols(u, "must_change_password", "passwd", "passwd_hash_algo", "salt"); err != nil {
 		ctx.ServerError("UpdateUser", err)
 		return
 	}

routers/user/setting/account.go

@@ -68,7 +68,7 @@ func AccountPost(ctx *context.Context, form auth.ChangePasswordForm) {
 			return
 		}
 		ctx.User.HashPassword(form.Password)
-		if err := models.UpdateUserCols(ctx.User, "salt", "passwd"); err != nil {
+		if err := models.UpdateUserCols(ctx.User, "salt", "passwd_hash_algo", "passwd"); err != nil {
 			ctx.ServerError("UpdateUser", err)
 			return
 		}