Move from deprecated ioutil to os and io packages (#4364)

4 files changed, 8 insertions, 9 deletions

diff --git a/modules/caddytls/acmeissuer.go b/modules/caddytls/acmeissuer.go
index 9a7e73c..42cef02 100644
--- a/modules/caddytls/acmeissuer.go
+++ b/modules/caddytls/acmeissuer.go
@@ -18,8 +18,8 @@ import (
 	"context"
 	"crypto/x509"
 	"fmt"
-	"io/ioutil"
 	"net/url"
+	"os"
 	"strconv"
 	"time"
 
@@ -152,7 +152,7 @@ func (iss *ACMEIssuer) Provision(ctx caddy.Context) error {
 	if len(iss.TrustedRootsPEMFiles) > 0 {
 		iss.rootPool = x509.NewCertPool()
 		for _, pemFile := range iss.TrustedRootsPEMFiles {
-			pemData, err := ioutil.ReadFile(pemFile)
+			pemData, err := os.ReadFile(pemFile)
 			if err != nil {
 				return fmt.Errorf("loading trusted root CA's PEM file: %s: %v", pemFile, err)
 			}
diff --git a/modules/caddytls/connpolicy.go b/modules/caddytls/connpolicy.go
index 6c7fe3f..65cda5f 100644
--- a/modules/caddytls/connpolicy.go
+++ b/modules/caddytls/connpolicy.go
@@ -19,7 +19,7 @@ import (
 	"crypto/x509"
 	"encoding/base64"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strings"
 
 	"github.com/caddyserver/caddy/v2"
@@ -369,7 +369,7 @@ func (clientauth *ClientAuthentication) ConfigureTLSConfig(cfg *tls.Config) erro
 			caPool.AddCert(clientCA)
 		}
 		for _, pemFile := range clientauth.TrustedCACertPEMFiles {
-			pemContents, err := ioutil.ReadFile(pemFile)
+			pemContents, err := os.ReadFile(pemFile)
 			if err != nil {
 				return fmt.Errorf("reading %s: %v", pemFile, err)
 			}
diff --git a/modules/caddytls/fileloader.go b/modules/caddytls/fileloader.go
index fdf5486..430932b 100644
--- a/modules/caddytls/fileloader.go
+++ b/modules/caddytls/fileloader.go
@@ -17,7 +17,7 @@ package caddytls
 import (
 	"crypto/tls"
 	"fmt"
-	"io/ioutil"
+	"os"
 
 	"github.com/caddyserver/caddy/v2"
 )
@@ -59,11 +59,11 @@ type CertKeyFilePair struct {
 func (fl FileLoader) LoadCertificates() ([]Certificate, error) {
 	certs := make([]Certificate, 0, len(fl))
 	for _, pair := range fl {
-		certData, err := ioutil.ReadFile(pair.Certificate)
+		certData, err := os.ReadFile(pair.Certificate)
 		if err != nil {
 			return nil, err
 		}
-		keyData, err := ioutil.ReadFile(pair.Key)
+		keyData, err := os.ReadFile(pair.Key)
 		if err != nil {
 			return nil, err
 		}
diff --git a/modules/caddytls/folderloader.go b/modules/caddytls/folderloader.go
index 10b017e..0ff0629 100644
--- a/modules/caddytls/folderloader.go
+++ b/modules/caddytls/folderloader.go
@@ -19,7 +19,6 @@ import (
 	"crypto/tls"
 	"encoding/pem"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -79,7 +78,7 @@ func (fl FolderLoader) LoadCertificates() ([]Certificate, error) {
 }
 
 func x509CertFromCertAndKeyPEMFile(fpath string) (tls.Certificate, error) {
-	bundle, err := ioutil.ReadFile(fpath)
+	bundle, err := os.ReadFile(fpath)
 	if err != nil {
 		return tls.Certificate{}, err
 	}