| // Copyright 2011 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build aix dragonfly freebsd js,wasm linux netbsd openbsd solaris |
| |
| package x509 |
| |
| import ( |
| "io/fs" |
| "io/ioutil" |
| "os" |
| "path/filepath" |
| "strings" |
| ) |
| |
| const ( |
| // certFileEnv is the environment variable which identifies where to locate |
| // the SSL certificate file. If set this overrides the system default. |
| certFileEnv = "SSL_CERT_FILE" |
| |
| // certDirEnv is the environment variable which identifies which directory |
| // to check for SSL certificate files. If set this overrides the system default. |
| // It is a colon separated list of directories. |
| // See https://www.openssl.org/docs/man1.0.2/man1/c_rehash.html. |
| certDirEnv = "SSL_CERT_DIR" |
| ) |
| |
| func (c *Certificate) systemVerify(opts *VerifyOptions) (chains [][]*Certificate, err error) { |
| return nil, nil |
| } |
| |
| func loadSystemRoots() (*CertPool, error) { |
| roots := NewCertPool() |
| |
| files := certFiles |
| if f := os.Getenv(certFileEnv); f != "" { |
| files = []string{f} |
| } |
| |
| var firstErr error |
| for _, file := range files { |
| data, err := ioutil.ReadFile(file) |
| if err == nil { |
| roots.AppendCertsFromPEM(data) |
| break |
| } |
| if firstErr == nil && !os.IsNotExist(err) { |
| firstErr = err |
| } |
| } |
| |
| dirs := certDirectories |
| if d := os.Getenv(certDirEnv); d != "" { |
| // OpenSSL and BoringSSL both use ":" as the SSL_CERT_DIR separator. |
| // See: |
| // * https://golang.org/issue/35325 |
| // * https://www.openssl.org/docs/man1.0.2/man1/c_rehash.html |
| dirs = strings.Split(d, ":") |
| } |
| |
| for _, directory := range dirs { |
| fis, err := readUniqueDirectoryEntries(directory) |
| if err != nil { |
| if firstErr == nil && !os.IsNotExist(err) { |
| firstErr = err |
| } |
| continue |
| } |
| for _, fi := range fis { |
| data, err := ioutil.ReadFile(directory + "/" + fi.Name()) |
| if err == nil { |
| roots.AppendCertsFromPEM(data) |
| } |
| } |
| } |
| |
| if len(roots.certs) > 0 || firstErr == nil { |
| return roots, nil |
| } |
| |
| return nil, firstErr |
| } |
| |
| // readUniqueDirectoryEntries is like ioutil.ReadDir but omits |
| // symlinks that point within the directory. |
| func readUniqueDirectoryEntries(dir string) ([]fs.FileInfo, error) { |
| fis, err := ioutil.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(fi fs.FileInfo, dir string) bool { |
| if fi.Mode()&fs.ModeSymlink == 0 { |
| return false |
| } |
| target, err := os.Readlink(filepath.Join(dir, fi.Name())) |
| return err == nil && !strings.Contains(target, "/") |
| } |