86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
// +build !windows
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// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package certs
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import (
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"crypto/x509"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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)
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// Possible directories with certificate files, this is an extended
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// list from https://golang.org/src/crypto/x509/root_unix.go?#L18
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// for k8s platform
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var certDirectories = []string{
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"/var/run/secrets/kubernetes.io/serviceaccount",
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}
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// readUniqueDirectoryEntries is like ioutil.ReadDir but omits
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// symlinks that point within the directory.
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func readUniqueDirectoryEntries(dir string) ([]os.FileInfo, error) {
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fis, err := ioutil.ReadDir(dir)
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if err != nil {
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return nil, err
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}
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uniq := fis[:0]
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for _, fi := range fis {
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if !isSameDirSymlink(fi, dir) {
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uniq = append(uniq, fi)
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}
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}
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return uniq, nil
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}
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// isSameDirSymlink reports whether fi in dir is a symlink with a
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// target not containing a slash.
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func isSameDirSymlink(fi os.FileInfo, dir string) bool {
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if fi.Mode()&os.ModeSymlink == 0 {
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return false
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}
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target, err := os.Readlink(filepath.Join(dir, fi.Name()))
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return err == nil && !strings.Contains(target, "/")
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}
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func loadSystemRoots() (*x509.CertPool, error) {
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caPool, err := x509.SystemCertPool()
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if err != nil {
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return caPool, err
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}
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for _, directory := range certDirectories {
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fis, err := readUniqueDirectoryEntries(directory)
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if err != nil {
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if os.IsNotExist(err) || os.IsPermission(err) {
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return caPool, nil
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}
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return caPool, err
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}
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for _, fi := range fis {
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data, err := ioutil.ReadFile(directory + "/" + fi.Name())
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if err == nil {
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caPool.AppendCertsFromPEM(data)
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}
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}
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}
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return caPool, nil
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}
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