Source file src/crypto/x509/root_unix.go

     1	// Copyright 2011 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build aix dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris
     6	
     7	package x509
     8	
     9	import (
    10		"io/ioutil"
    11		"os"
    12	)
    13	
    14	// Possible directories with certificate files; stop after successfully
    15	// reading at least one file from a directory.
    16	var certDirectories = []string{
    17		"/etc/ssl/certs",               // SLES10/SLES11, https://golang.org/issue/12139
    18		"/system/etc/security/cacerts", // Android
    19		"/usr/local/share/certs",       // FreeBSD
    20		"/etc/pki/tls/certs",           // Fedora/RHEL
    21		"/etc/openssl/certs",           // NetBSD
    22		"/var/ssl/certs",               // AIX
    23	}
    24	
    25	const (
    26		// certFileEnv is the environment variable which identifies where to locate
    27		// the SSL certificate file. If set this overrides the system default.
    28		certFileEnv = "SSL_CERT_FILE"
    29	
    30		// certDirEnv is the environment variable which identifies which directory
    31		// to check for SSL certificate files. If set this overrides the system default.
    32		certDirEnv = "SSL_CERT_DIR"
    33	)
    34	
    35	func (c *Certificate) systemVerify(opts *VerifyOptions) (chains [][]*Certificate, err error) {
    36		return nil, nil
    37	}
    38	
    39	func loadSystemRoots() (*CertPool, error) {
    40		roots := NewCertPool()
    41	
    42		files := certFiles
    43		if f := os.Getenv(certFileEnv); f != "" {
    44			files = []string{f}
    45		}
    46	
    47		var firstErr error
    48		for _, file := range files {
    49			data, err := ioutil.ReadFile(file)
    50			if err == nil {
    51				roots.AppendCertsFromPEM(data)
    52				break
    53			}
    54			if firstErr == nil && !os.IsNotExist(err) {
    55				firstErr = err
    56			}
    57		}
    58	
    59		dirs := certDirectories
    60		if d := os.Getenv(certDirEnv); d != "" {
    61			dirs = []string{d}
    62		}
    63	
    64		for _, directory := range dirs {
    65			fis, err := ioutil.ReadDir(directory)
    66			if err != nil {
    67				if firstErr == nil && !os.IsNotExist(err) {
    68					firstErr = err
    69				}
    70				continue
    71			}
    72			rootsAdded := false
    73			for _, fi := range fis {
    74				data, err := ioutil.ReadFile(directory + "/" + fi.Name())
    75				if err == nil && roots.AppendCertsFromPEM(data) {
    76					rootsAdded = true
    77				}
    78			}
    79			if rootsAdded {
    80				return roots, nil
    81			}
    82		}
    83	
    84		if len(roots.certs) > 0 || firstErr == nil {
    85			return roots, nil
    86		}
    87	
    88		return nil, firstErr
    89	}
    90	

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