From f7b99a39152694f72104b95e6a30e245248c75d7 Mon Sep 17 00:00:00 2001
From: Joseph Richey <joerichey94@gmail.com>
Date: Tue, 24 Oct 2017 13:19:08 -0700
Subject: crypto: Merge with security package

---
 security/privileges.go | 99 --------------------------------------------------
 1 file changed, 99 deletions(-)
 delete mode 100644 security/privileges.go

(limited to 'security/privileges.go')

diff --git a/security/privileges.go b/security/privileges.go
deleted file mode 100644
index 7d69da9..0000000
--- a/security/privileges.go
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * privileges.go - Functions for managing users and privileges.
- *
- * Copyright 2017 Google Inc.
- * Author: Joe Richey (joerichey@google.com)
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
-
-// Package security manages:
-//  - Cache clearing (cache.go)
-//  - Keyring Operations (keyring.go)
-//  - Privilege manipulation (privileges.go)
-//  - Maintaining the link between the root and user keyrings.
-package security
-
-import (
-	"log"
-	"os"
-	"os/user"
-
-	"github.com/pkg/errors"
-	"golang.org/x/sys/unix"
-
-	"github.com/google/fscrypt/util"
-)
-
-// SetThreadPrivileges temporarily drops the privileges of the current thread to
-// have the effective uid/gid of the target user. The privileges can be changed
-// again with another call to SetThreadPrivileges.
-func SetThreadPrivileges(target *user.User) error {
-	euid := util.AtoiOrPanic(target.Uid)
-	egid := util.AtoiOrPanic(target.Gid)
-	if os.Geteuid() == euid {
-		log.Printf("Privileges already set to %q", target.Username)
-		return nil
-	}
-	log.Printf("Setting privileges to %q", target.Username)
-
-	// If setting privs to root, we want to set the uid first, so we will
-	// then have the necessary permissions to perform the other actions.
-	if euid == 0 {
-		if err := setUids(-1, euid); err != nil {
-			return err
-		}
-	}
-	if err := setGids(-1, egid); err != nil {
-		return err
-	}
-	if err := setGroups(target); err != nil {
-		return err
-	}
-	// If not setting privs to root, we want to avoid dropping the uid
-	// util the very end.
-	if euid != 0 {
-		if err := setUids(-1, euid); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func setUids(ruid, euid int) error {
-	err := unix.Setreuid(ruid, euid)
-	log.Printf("Setreuid(%d, %d) = %v", ruid, euid, err)
-	return errors.Wrapf(err, "setting uids")
-}
-
-func setGids(rgid, egid int) error {
-	err := unix.Setregid(rgid, egid)
-	log.Printf("Setregid(%d, %d) = %v", rgid, egid, err)
-	return errors.Wrapf(err, "setting gids")
-}
-
-func setGroups(target *user.User) error {
-	groupStrings, err := target.GroupIds()
-	if err != nil {
-		return util.SystemError(err.Error())
-	}
-
-	gids := make([]int, len(groupStrings))
-	for i, groupString := range groupStrings {
-		gids[i] = util.AtoiOrPanic(groupString)
-	}
-
-	err = unix.Setgroups(gids)
-	log.Printf("Setgroups(%v) = %v", gids, err)
-	return errors.Wrapf(err, "setting groups")
-}
-- 
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