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