ocsp: replace uses of deprecated io/ioutil

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

ocsp/ocsp.go

@@ -1,9 +1,7 @@
 /*
-
 Package ocsp exposes OCSP signing functionality, much like the signer
 package does for certificate signing.  It also provies a basic OCSP
 responder stack for serving pre-signed OCSP responses.
-
 */
 package ocsp
 
@@ -12,7 +10,7 @@ import (
 	"crypto"
 	"crypto/x509"
 	"crypto/x509/pkix"
-	"io/ioutil"
+	"os"
 	"strconv"
 	"strings"
 	"time"
@@ -113,12 +111,12 @@ func NewSignerFromFile(issuerFile, responderFile, keyFile string, interval time.
 		return nil, err
 	}
 	log.Debug("Loading responder cert: ", responderFile)
-	responderBytes, err := ioutil.ReadFile(responderFile)
+	responderBytes, err := os.ReadFile(responderFile)
 	if err != nil {
 		return nil, err
 	}
 	log.Debug("Loading responder key: ", keyFile)
-	keyBytes, err := ioutil.ReadFile(keyFile)
+	keyBytes, err := os.ReadFile(keyFile)
 	if err != nil {
 		return nil, cferr.Wrap(cferr.CertificateError, cferr.ReadFailed, err)
 	}

ocsp/ocsp_test.go

@@ -1,13 +1,13 @@
 package ocsp
 
 import (
-	"io/ioutil"
+	"os"
 	"testing"
 	"time"
 
-	"golang.org/x/crypto/ocsp"
-
 	"github.com/cloudflare/cfssl/helpers"
+
+	"golang.org/x/crypto/ocsp"
 )
 
 const (
@@ -65,7 +65,7 @@ func TestNewSignerFromFile(t *testing.T) {
 
 func setup(t *testing.T) (SignRequest, time.Duration) {
 	dur, _ := time.ParseDuration("1ms")
-	certPEM, err := ioutil.ReadFile(otherCertFile)
+	certPEM, err := os.ReadFile(otherCertFile)
 	if err != nil {
 		t.Fatal(err)
 	}

ocsp/responder.go

@@ -15,9 +15,10 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
+	"os"
 	"regexp"
 	"time"
 
@@ -131,7 +132,7 @@ func (src DBSource) Response(req *ocsp.Request) ([]byte, http.Header, error) {
 // PEM without headers or whitespace).  Invalid responses are ignored.
 // This function pulls the entire file into an InMemorySource.
 func NewSourceFromFile(responseFile string) (Source, error) {
-	fileContents, err := ioutil.ReadFile(responseFile)
+	fileContents, err := os.ReadFile(responseFile)
 	if err != nil {
 		return nil, err
 	}
@@ -309,7 +310,7 @@ func (rs Responder) ServeHTTP(response http.ResponseWriter, request *http.Reques
 			return
 		}
 	case "POST":
-		requestBody, err = ioutil.ReadAll(request.Body)
+		requestBody, err = io.ReadAll(request.Body)
 		if err != nil {
 			log.Errorf("Problem reading body of POST: %s", err)
 			response.WriteHeader(http.StatusBadRequest)

ocsp/responder_test.go

@@ -2,10 +2,10 @@ package ocsp
 
 import (
 	"encoding/hex"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
+	"os"
 	"reflect"
 	"testing"
 	"time"
@@ -210,11 +210,11 @@ func TestSqliteTrivial(t *testing.T) {
 	// an OCSP request.
 	certFile := "testdata/sqlite_ca.pem"
 	issuerFile := "testdata/ca.pem"
-	certContent, err := ioutil.ReadFile(certFile)
+	certContent, err := os.ReadFile(certFile)
 	if err != nil {
 		t.Errorf("Error reading cert file: %s", err)
 	}
-	issuerContent, err := ioutil.ReadFile(issuerFile)
+	issuerContent, err := os.ReadFile(issuerFile)
 	if err != nil {
 		t.Errorf("Error reading issuer file: %s", err)
 	}
@@ -274,11 +274,11 @@ func TestSqliteRealResponse(t *testing.T) {
 
 	certFile := "testdata/cert.pem"
 	issuerFile := "testdata/ca.pem"
-	certContent, err := ioutil.ReadFile(certFile)
+	certContent, err := os.ReadFile(certFile)
 	if err != nil {
 		t.Errorf("Error reading cert file: %s", err)
 	}
-	issuerContent, err := ioutil.ReadFile(issuerFile)
+	issuerContent, err := os.ReadFile(issuerFile)
 	if err != nil {
 		t.Errorf("Error reading issuer file: %s", err)
 	}
@@ -308,7 +308,7 @@ func TestSqliteRealResponse(t *testing.T) {
 		ThisUpdate:   time.Now(),
 		NextUpdate:   time.Now().AddDate(0, 1, 0),
 	}
-	keyPEM, err := ioutil.ReadFile("testdata/ca-key.pem")
+	keyPEM, err := os.ReadFile("testdata/ca-key.pem")
 	if err != nil {
 		t.Errorf("Error reading private key file: %s", err)
 	}