From f8b3af78fc59c56edf318bdb763129ab45b07b54 Mon Sep 17 00:00:00 2001
From: Sebastiaan van Stijn <github@gone.nl>
Date: Wed, 2 Nov 2022 22:55:22 +0100
Subject: [PATCH] replace deprecated io/ioutil

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
---
 configuration/configuration.go                |   3 +-
 registry/auth/htpasswd/access_test.go         |  10 +-
 registry/auth/token/accesscontroller.go       |   4 +-
 registry/auth/token/token_test.go             |   3 +-
 registry/client/blob_writer.go                |   3 +-
 registry/client/errors.go                     |   3 +-
 registry/client/repository.go                 |   9 +-
 registry/client/repository_test.go            |   5 +-
 registry/handlers/api_test.go                 |   9 +-
 registry/handlers/health_test.go              |   3 +-
 registry/proxy/proxyblobstore_test.go         |  14 +--
 registry/registry.go                          |   3 +-
 registry/registry_test.go                     |   6 +-
 registry/storage/blob_test.go                 |   7 +-
 registry/storage/driver/azure/azure.go        |   5 +-
 registry/storage/driver/filesystem/driver.go  |   3 +-
 .../storage/driver/filesystem/driver_test.go  |   7 +-
 registry/storage/driver/gcs/gcs.go            |  10 +-
 registry/storage/driver/gcs/gcs_test.go       |  27 +----
 registry/storage/driver/inmemory/driver.go    |   5 +-
 .../middleware/cloudfront/middleware.go       |   4 +-
 .../middleware/cloudfront/middleware_test.go  |   3 +-
 .../driver/middleware/cloudfront/s3filter.go  |   4 +-
 registry/storage/driver/oss/oss.go            |   3 +-
 registry/storage/driver/oss/oss_test.go       |   9 +-
 registry/storage/driver/s3-aws/s3.go          |   7 +-
 registry/storage/driver/s3-aws/s3_test.go     | 106 ++++++------------
 registry/storage/driver/swift/swift.go        |   3 +-
 registry/storage/driver/swift/swift_test.go   |   9 +-
 .../storage/driver/testsuites/testsuites.go   |  19 ++--
 registry/storage/filereader.go                |   3 +-
 registry/storage/io.go                        |   3 +-
 testutil/handler.go                           |   3 +-
 33 files changed, 113 insertions(+), 202 deletions(-)

diff --git a/configuration/configuration.go b/configuration/configuration.go
index ad7b5009..c0d799f3 100644
--- a/configuration/configuration.go
+++ b/configuration/configuration.go
@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"reflect"
 	"strings"
@@ -654,7 +653,7 @@ type Proxy struct {
 // Configuration.Abc may be replaced by the value of REGISTRY_ABC,
 // Configuration.Abc.Xyz may be replaced by the value of REGISTRY_ABC_XYZ, and so forth
 func Parse(rd io.Reader) (*Configuration, error) {
-	in, err := ioutil.ReadAll(rd)
+	in, err := io.ReadAll(rd)
 	if err != nil {
 		return nil, err
 	}
diff --git a/registry/auth/htpasswd/access_test.go b/registry/auth/htpasswd/access_test.go
index 9253ccd2..25947757 100644
--- a/registry/auth/htpasswd/access_test.go
+++ b/registry/auth/htpasswd/access_test.go
@@ -2,7 +2,7 @@ package htpasswd
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"os"
@@ -21,7 +21,7 @@ func TestBasicAccessController(t *testing.T) {
 							MiShil:$2y$05$0oHgwMehvoe8iAWS8I.7l.KoECXrwVaC16RPfaSCU5eVTFrATuMI2
 							DeokMan:공주님`
 
-	tempFile, err := ioutil.TempFile("", "htpasswd-test")
+	tempFile, err := os.CreateTemp("", "htpasswd-test")
 	if err != nil {
 		t.Fatal("could not create temporary htpasswd file")
 	}
@@ -122,7 +122,7 @@ func TestBasicAccessController(t *testing.T) {
 }
 
 func TestCreateHtpasswdFile(t *testing.T) {
-	tempFile, err := ioutil.TempFile("", "htpasswd-test")
+	tempFile, err := os.CreateTemp("", "htpasswd-test")
 	if err != nil {
 		t.Fatalf("could not create temporary htpasswd file %v", err)
 	}
@@ -135,7 +135,7 @@ func TestCreateHtpasswdFile(t *testing.T) {
 	if _, err := newAccessController(options); err != nil {
 		t.Fatalf("error creating access controller %v", err)
 	}
-	content, err := ioutil.ReadAll(tempFile)
+	content, err := io.ReadAll(tempFile)
 	if err != nil {
 		t.Fatalf("failed to read file %v", err)
 	}
@@ -150,7 +150,7 @@ func TestCreateHtpasswdFile(t *testing.T) {
 	if _, err := newAccessController(options); err != nil {
 		t.Fatalf("error creating access controller %v", err)
 	}
-	content, err = ioutil.ReadFile(tempFile.Name())
+	content, err = os.ReadFile(tempFile.Name())
 	if err != nil {
 		t.Fatalf("failed to read file %v", err)
 	}
diff --git a/registry/auth/token/accesscontroller.go b/registry/auth/token/accesscontroller.go
index ec001ad1..e56a4ccd 100644
--- a/registry/auth/token/accesscontroller.go
+++ b/registry/auth/token/accesscontroller.go
@@ -7,7 +7,7 @@ import (
 	"encoding/pem"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"os"
 	"strings"
@@ -187,7 +187,7 @@ func newAccessController(options map[string]interface{}) (auth.AccessController,
 	}
 	defer fp.Close()
 
-	rawCertBundle, err := ioutil.ReadAll(fp)
+	rawCertBundle, err := io.ReadAll(fp)
 	if err != nil {
 		return nil, fmt.Errorf("unable to read token auth root certificate bundle file %q: %s", config.rootCertBundle, err)
 	}
diff --git a/registry/auth/token/token_test.go b/registry/auth/token/token_test.go
index 3d80fa2e..7fa62be5 100644
--- a/registry/auth/token/token_test.go
+++ b/registry/auth/token/token_test.go
@@ -8,7 +8,6 @@ import (
 	"encoding/json"
 	"encoding/pem"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"strings"
@@ -285,7 +284,7 @@ func writeTempRootCerts(rootKeys []libtrust.PrivateKey) (filename string, err er
 		return "", err
 	}
 
-	tempFile, err := ioutil.TempFile("", "rootCertBundle")
+	tempFile, err := os.CreateTemp("", "rootCertBundle")
 	if err != nil {
 		return "", err
 	}
diff --git a/registry/client/blob_writer.go b/registry/client/blob_writer.go
index cbda181b..7b467d84 100644
--- a/registry/client/blob_writer.go
+++ b/registry/client/blob_writer.go
@@ -5,7 +5,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"time"
 
@@ -38,7 +37,7 @@ func (hbu *httpBlobUpload) handleErrorResponse(resp *http.Response) error {
 }
 
 func (hbu *httpBlobUpload) ReadFrom(r io.Reader) (n int64, err error) {
-	req, err := http.NewRequestWithContext(hbu.ctx, http.MethodPatch, hbu.location, ioutil.NopCloser(r))
+	req, err := http.NewRequestWithContext(hbu.ctx, http.MethodPatch, hbu.location, io.NopCloser(r))
 	if err != nil {
 		return 0, err
 	}
diff --git a/registry/client/errors.go b/registry/client/errors.go
index 7e5d1236..68bfe19d 100644
--- a/registry/client/errors.go
+++ b/registry/client/errors.go
@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 
 	"github.com/distribution/distribution/v3/registry/api/errcode"
@@ -40,7 +39,7 @@ func (e *UnexpectedHTTPResponseError) Error() string {
 
 func parseHTTPErrorResponse(statusCode int, r io.Reader) error {
 	var errors errcode.Errors
-	body, err := ioutil.ReadAll(r)
+	body, err := io.ReadAll(r)
 	if err != nil {
 		return err
 	}
diff --git a/registry/client/repository.go b/registry/client/repository.go
index 81adaac5..10c6fe3f 100644
--- a/registry/client/repository.go
+++ b/registry/client/repository.go
@@ -7,7 +7,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"strconv"
@@ -227,7 +226,7 @@ func (t *tags) All(ctx context.Context) ([]string, error) {
 		defer resp.Body.Close()
 
 		if SuccessStatus(resp.StatusCode) {
-			b, err := ioutil.ReadAll(resp.Body)
+			b, err := io.ReadAll(resp.Body)
 			if err != nil {
 				return tags, err
 			}
@@ -268,7 +267,7 @@ func descriptorFromResponse(response *http.Response) (distribution.Descriptor, e
 
 	digestHeader := headers.Get("Docker-Content-Digest")
 	if digestHeader == "" {
-		data, err := ioutil.ReadAll(response.Body)
+		data, err := io.ReadAll(response.Body)
 		if err != nil {
 			return distribution.Descriptor{}, err
 		}
@@ -527,7 +526,7 @@ func (ms *manifests) Get(ctx context.Context, dgst digest.Digest, options ...dis
 			}
 		}
 		mt := resp.Header.Get("Content-Type")
-		body, err := ioutil.ReadAll(resp.Body)
+		body, err := io.ReadAll(resp.Body)
 		if err != nil {
 			return nil, err
 		}
@@ -674,7 +673,7 @@ func (bs *blobs) Get(ctx context.Context, dgst digest.Digest) ([]byte, error) {
 	}
 	defer reader.Close()
 
-	return ioutil.ReadAll(reader)
+	return io.ReadAll(reader)
 }
 
 func (bs *blobs) Open(ctx context.Context, dgst digest.Digest) (distribution.ReadSeekCloser, error) {
diff --git a/registry/client/repository_test.go b/registry/client/repository_test.go
index b4b527cb..4e926de7 100644
--- a/registry/client/repository_test.go
+++ b/registry/client/repository_test.go
@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"net/http/httptest"
@@ -126,7 +125,7 @@ func TestBlobServeBlob(t *testing.T) {
 		t.Errorf("Error serving blob: %s", err.Error())
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		t.Errorf("Error reading response body: %s", err.Error())
 	}
@@ -175,7 +174,7 @@ func TestBlobServeBlobHEAD(t *testing.T) {
 		t.Errorf("Error serving blob: %s", err.Error())
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		t.Errorf("Error reading response body: %s", err.Error())
 	}
diff --git a/registry/handlers/api_test.go b/registry/handlers/api_test.go
index 2822e071..dcbc1de6 100644
--- a/registry/handlers/api_test.go
+++ b/registry/handlers/api_test.go
@@ -7,7 +7,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"net/http/httputil"
@@ -69,7 +68,7 @@ func TestCheckAPI(t *testing.T) {
 		"Content-Length": []string{"2"},
 	})
 
-	p, err := ioutil.ReadAll(resp.Body)
+	p, err := io.ReadAll(resp.Body)
 	if err != nil {
 		t.Fatalf("unexpected error reading response body: %v", err)
 	}
@@ -1857,7 +1856,7 @@ func testManifestAPISchema2(t *testing.T, env *testEnv, imageName reference.Name
 	}
 	defer resp.Body.Close()
 
-	manifestBytes, err := ioutil.ReadAll(resp.Body)
+	manifestBytes, err := io.ReadAll(resp.Body)
 	if err != nil {
 		t.Fatalf("error reading response body: %v", err)
 	}
@@ -2091,7 +2090,7 @@ func testManifestAPIManifestList(t *testing.T, env *testEnv, args manifestArgs)
 	}
 	defer resp.Body.Close()
 
-	manifestBytes, err := ioutil.ReadAll(resp.Body)
+	manifestBytes, err := io.ReadAll(resp.Body)
 	if err != nil {
 		t.Fatalf("error reading response body: %v", err)
 	}
@@ -2614,7 +2613,7 @@ func checkResponse(t *testing.T, msg string, resp *http.Response, expectedStatus
 // expected error codes, returning the error structure, the json slice and a
 // count of the errors by code.
 func checkBodyHasErrorCodes(t *testing.T, msg string, resp *http.Response, errorCodes ...errcode.ErrorCode) (errcode.Errors, []byte, map[errcode.ErrorCode]int) {
-	p, err := ioutil.ReadAll(resp.Body)
+	p, err := io.ReadAll(resp.Body)
 	if err != nil {
 		t.Fatalf("unexpected error reading body %s: %v", msg, err)
 	}
diff --git a/registry/handlers/health_test.go b/registry/handlers/health_test.go
index 9b28ebfb..e0d61555 100644
--- a/registry/handlers/health_test.go
+++ b/registry/handlers/health_test.go
@@ -1,7 +1,6 @@
 package handlers
 
 import (
-	"io/ioutil"
 	"net"
 	"net/http"
 	"net/http/httptest"
@@ -17,7 +16,7 @@ import (
 func TestFileHealthCheck(t *testing.T) {
 	interval := time.Second
 
-	tmpfile, err := ioutil.TempFile(os.TempDir(), "healthcheck")
+	tmpfile, err := os.CreateTemp(os.TempDir(), "healthcheck")
 	if err != nil {
 		t.Fatalf("could not create temporary file: %v", err)
 	}
diff --git a/registry/proxy/proxyblobstore_test.go b/registry/proxy/proxyblobstore_test.go
index 9b0c1c20..386bd41f 100644
--- a/registry/proxy/proxyblobstore_test.go
+++ b/registry/proxy/proxyblobstore_test.go
@@ -2,7 +2,6 @@ package proxy
 
 import (
 	"context"
-	"io/ioutil"
 	"math/rand"
 	"net/http"
 	"net/http/httptest"
@@ -114,6 +113,8 @@ func (te *testEnv) RemoteStats() *map[string]int {
 
 // Populate remote store and record the digests
 func makeTestEnv(t *testing.T, name string) *testEnv {
+	t.Helper()
+
 	nameRef, err := reference.WithName(name)
 	if err != nil {
 		t.Fatalf("unable to parse reference: %s", err)
@@ -121,15 +122,8 @@ func makeTestEnv(t *testing.T, name string) *testEnv {
 
 	ctx := context.Background()
 
-	truthDir, err := ioutil.TempDir("", "truth")
-	if err != nil {
-		t.Fatalf("unable to create tempdir: %s", err)
-	}
-
-	cacheDir, err := ioutil.TempDir("", "cache")
-	if err != nil {
-		t.Fatalf("unable to create tempdir: %s", err)
-	}
+	truthDir := t.TempDir()
+	cacheDir := t.TempDir()
 
 	localDriver, err := filesystem.FromParameters(map[string]interface{}{
 		"rootdirectory": truthDir,
diff --git a/registry/registry.go b/registry/registry.go
index 8eebe6a4..e7fe1699 100644
--- a/registry/registry.go
+++ b/registry/registry.go
@@ -5,7 +5,6 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"os/signal"
@@ -268,7 +267,7 @@ func (registry *Registry) ListenAndServe() error {
 			pool := x509.NewCertPool()
 
 			for _, ca := range config.HTTP.TLS.ClientCAs {
-				caPem, err := ioutil.ReadFile(ca)
+				caPem, err := os.ReadFile(ca)
 				if err != nil {
 					return err
 				}
diff --git a/registry/registry_test.go b/registry/registry_test.go
index c8800b93..5a7210ff 100644
--- a/registry/registry_test.go
+++ b/registry/registry_test.go
@@ -13,7 +13,7 @@ import (
 	"crypto/x509/pkix"
 	"encoding/pem"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"math/big"
 	"net"
 	"net/http"
@@ -121,7 +121,7 @@ func TestGracefulShutdown(t *testing.T) {
 	if resp.Status != "200 OK" {
 		t.Error("response status is not 200 OK: ", resp.Status)
 	}
-	if body, err := ioutil.ReadAll(resp.Body); err != nil || string(body) != "{}" {
+	if body, err := io.ReadAll(resp.Body); err != nil || string(body) != "{}" {
 		t.Error("Body is not {}; ", string(body))
 	}
 }
@@ -316,7 +316,7 @@ func TestRegistrySupportedCipherSuite(t *testing.T) {
 	if resp.Status != "200 OK" {
 		t.Error("response status is not 200 OK: ", resp.Status)
 	}
-	if body, err := ioutil.ReadAll(resp.Body); err != nil || string(body) != "{}" {
+	if body, err := io.ReadAll(resp.Body); err != nil || string(body) != "{}" {
 		t.Error("Body is not {}; ", string(body))
 	}
 
diff --git a/registry/storage/blob_test.go b/registry/storage/blob_test.go
index b0f88ac1..6df9e700 100644
--- a/registry/storage/blob_test.go
+++ b/registry/storage/blob_test.go
@@ -6,7 +6,6 @@ import (
 	"crypto/sha256"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"path"
 	"reflect"
 	"testing"
@@ -210,7 +209,7 @@ func TestSimpleBlobUpload(t *testing.T) {
 	}
 
 	// Re-upload the blob
-	randomBlob, err := ioutil.ReadAll(randomDataReader)
+	randomBlob, err := io.ReadAll(randomDataReader)
 	if err != nil {
 		t.Fatalf("Error reading all of blob %s", err.Error())
 	}
@@ -328,7 +327,7 @@ func TestSimpleBlobRead(t *testing.T) {
 		t.Fatalf("seek failed: expected 0 offset, got %d", offset)
 	}
 
-	p, err := ioutil.ReadAll(rc)
+	p, err := io.ReadAll(rc)
 	if err != nil {
 		t.Fatalf("error reading all of blob: %v", err)
 	}
@@ -343,7 +342,7 @@ func TestSimpleBlobRead(t *testing.T) {
 		t.Fatalf("error resetting layer reader: %v", err)
 	}
 
-	randomLayerData, err := ioutil.ReadAll(randomLayerReader)
+	randomLayerData, err := io.ReadAll(randomLayerReader)
 	if err != nil {
 		t.Fatalf("random layer read failed: %v", err)
 	}
diff --git a/registry/storage/driver/azure/azure.go b/registry/storage/driver/azure/azure.go
index 8ef753dc..05b95e47 100644
--- a/registry/storage/driver/azure/azure.go
+++ b/registry/storage/driver/azure/azure.go
@@ -8,7 +8,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"strings"
 	"time"
@@ -115,7 +114,7 @@ func (d *driver) GetContent(ctx context.Context, path string) ([]byte, error) {
 	}
 
 	defer blob.Close()
-	return ioutil.ReadAll(blob)
+	return io.ReadAll(blob)
 }
 
 // PutContent stores the []byte content at a location designated by "path".
@@ -172,7 +171,7 @@ func (d *driver) Reader(ctx context.Context, path string, offset int64) (io.Read
 	info := blobRef.Properties
 	size := info.ContentLength
 	if offset >= size {
-		return ioutil.NopCloser(bytes.NewReader(nil)), nil
+		return io.NopCloser(bytes.NewReader(nil)), nil
 	}
 
 	resp, err := blobRef.GetRange(&azure.GetBlobRangeOptions{
diff --git a/registry/storage/driver/filesystem/driver.go b/registry/storage/driver/filesystem/driver.go
index c0cae7ca..3db3ebff 100644
--- a/registry/storage/driver/filesystem/driver.go
+++ b/registry/storage/driver/filesystem/driver.go
@@ -6,7 +6,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path"
 	"time"
@@ -123,7 +122,7 @@ func (d *driver) GetContent(ctx context.Context, path string) ([]byte, error) {
 	}
 	defer rc.Close()
 
-	p, err := ioutil.ReadAll(rc)
+	p, err := io.ReadAll(rc)
 	if err != nil {
 		return nil, err
 	}
diff --git a/registry/storage/driver/filesystem/driver_test.go b/registry/storage/driver/filesystem/driver_test.go
index 2203625f..3f56f168 100644
--- a/registry/storage/driver/filesystem/driver_test.go
+++ b/registry/storage/driver/filesystem/driver_test.go
@@ -1,7 +1,6 @@
 package filesystem
 
 import (
-	"io/ioutil"
 	"os"
 	"reflect"
 	"testing"
@@ -15,13 +14,13 @@ import (
 func Test(t *testing.T) { TestingT(t) }
 
 func init() {
-	root, err := ioutil.TempDir("", "driver-")
+	root, err := os.MkdirTemp("", "driver-")
 	if err != nil {
 		panic(err)
 	}
 	defer os.Remove(root)
 
-	driver, err := FromParameters(map[string]interface{}{
+	drvr, err := FromParameters(map[string]interface{}{
 		"rootdirectory": root,
 	})
 	if err != nil {
@@ -29,7 +28,7 @@ func init() {
 	}
 
 	testsuites.RegisterSuite(func() (storagedriver.StorageDriver, error) {
-		return driver, nil
+		return drvr, nil
 	}, testsuites.NeverSkip)
 }
 
diff --git a/registry/storage/driver/gcs/gcs.go b/registry/storage/driver/gcs/gcs.go
index abc32be8..161fdf84 100644
--- a/registry/storage/driver/gcs/gcs.go
+++ b/registry/storage/driver/gcs/gcs.go
@@ -21,10 +21,10 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"net/http"
 	"net/url"
+	"os"
 	"reflect"
 	"regexp"
 	"sort"
@@ -151,7 +151,7 @@ func FromParameters(parameters map[string]interface{}) (storagedriver.StorageDri
 	var ts oauth2.TokenSource
 	jwtConf := new(jwt.Config)
 	if keyfile, ok := parameters["keyfile"]; ok {
-		jsonKey, err := ioutil.ReadFile(fmt.Sprint(keyfile))
+		jsonKey, err := os.ReadFile(fmt.Sprint(keyfile))
 		if err != nil {
 			return nil, err
 		}
@@ -263,7 +263,7 @@ func (d *driver) GetContent(context context.Context, path string) ([]byte, error
 	}
 	defer rc.Close()
 
-	p, err := ioutil.ReadAll(rc)
+	p, err := io.ReadAll(rc)
 	if err != nil {
 		return nil, err
 	}
@@ -299,7 +299,7 @@ func (d *driver) Reader(context context.Context, path string, offset int64) (io.
 					return nil, err
 				}
 				if offset == int64(obj.Size) {
-					return ioutil.NopCloser(bytes.NewReader([]byte{})), nil
+					return io.NopCloser(bytes.NewReader([]byte{})), nil
 				}
 				return nil, storagedriver.InvalidOffsetError{Path: path, Offset: offset}
 			}
@@ -557,7 +557,7 @@ func (w *writer) init(path string) error {
 	if err != nil {
 		return err
 	}
-	buffer, err := ioutil.ReadAll(res.Body)
+	buffer, err := io.ReadAll(res.Body)
 	if err != nil {
 		return err
 	}
diff --git a/registry/storage/driver/gcs/gcs_test.go b/registry/storage/driver/gcs/gcs_test.go
index 1f13c3c9..c4271cbd 100644
--- a/registry/storage/driver/gcs/gcs_test.go
+++ b/registry/storage/driver/gcs/gcs_test.go
@@ -5,7 +5,6 @@ package gcs
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -43,7 +42,7 @@ func init() {
 		return
 	}
 
-	root, err := ioutil.TempDir("", "driver-")
+	root, err := os.MkdirTemp("", "driver-")
 	if err != nil {
 		panic(err)
 	}
@@ -95,11 +94,7 @@ func TestCommitEmpty(t *testing.T) {
 		t.Skip(skipGCS())
 	}
 
-	validRoot, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(validRoot)
+	validRoot := t.TempDir()
 
 	driver, err := gcsDriverConstructor(validRoot)
 	if err != nil {
@@ -141,11 +136,7 @@ func TestCommit(t *testing.T) {
 		t.Skip(skipGCS())
 	}
 
-	validRoot, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(validRoot)
+	validRoot := t.TempDir()
 
 	driver, err := gcsDriverConstructor(validRoot)
 	if err != nil {
@@ -227,11 +218,7 @@ func TestEmptyRootList(t *testing.T) {
 		t.Skip(skipGCS())
 	}
 
-	validRoot, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(validRoot)
+	validRoot := t.TempDir()
 
 	rootedDriver, err := gcsDriverConstructor(validRoot)
 	if err != nil {
@@ -282,11 +269,7 @@ func TestMoveDirectory(t *testing.T) {
 		t.Skip(skipGCS())
 	}
 
-	validRoot, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(validRoot)
+	validRoot := t.TempDir()
 
 	driver, err := gcsDriverConstructor(validRoot)
 	if err != nil {
diff --git a/registry/storage/driver/inmemory/driver.go b/registry/storage/driver/inmemory/driver.go
index 7e8054e9..c803ac9b 100644
--- a/registry/storage/driver/inmemory/driver.go
+++ b/registry/storage/driver/inmemory/driver.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"sync"
 	"time"
 
@@ -79,7 +78,7 @@ func (d *driver) GetContent(ctx context.Context, path string) ([]byte, error) {
 	}
 	defer rc.Close()
 
-	return ioutil.ReadAll(rc)
+	return io.ReadAll(rc)
 }
 
 // PutContent stores the []byte content at a location designated by "path".
@@ -127,7 +126,7 @@ func (d *driver) reader(ctx context.Context, path string, offset int64) (io.Read
 		return nil, fmt.Errorf("%q is a directory", path)
 	}
 
-	return ioutil.NopCloser(found.(*file).sectionReader(offset)), nil
+	return io.NopCloser(found.(*file).sectionReader(offset)), nil
 }
 
 // Writer returns a FileWriter which will store the content written to it
diff --git a/registry/storage/driver/middleware/cloudfront/middleware.go b/registry/storage/driver/middleware/cloudfront/middleware.go
index e538e05e..5c2c0995 100644
--- a/registry/storage/driver/middleware/cloudfront/middleware.go
+++ b/registry/storage/driver/middleware/cloudfront/middleware.go
@@ -7,8 +7,8 @@ import (
 	"crypto/x509"
 	"encoding/pem"
 	"fmt"
-	"io/ioutil"
 	"net/url"
+	"os"
 	"strings"
 	"time"
 
@@ -89,7 +89,7 @@ func newCloudFrontStorageMiddleware(storageDriver storagedriver.StorageDriver, o
 	}
 
 	// get urlSigner from the file specified in pkPath
-	pkBytes, err := ioutil.ReadFile(pkPath)
+	pkBytes, err := os.ReadFile(pkPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to read privatekey file: %s", err)
 	}
diff --git a/registry/storage/driver/middleware/cloudfront/middleware_test.go b/registry/storage/driver/middleware/cloudfront/middleware_test.go
index e9cefa56..4e75c643 100644
--- a/registry/storage/driver/middleware/cloudfront/middleware_test.go
+++ b/registry/storage/driver/middleware/cloudfront/middleware_test.go
@@ -1,7 +1,6 @@
 package middleware
 
 import (
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -41,7 +40,7 @@ pZeMRablbPQdp8/1NyIwimq1VlG0ohQ4P6qhW7E09ZMC
 -----END RSA PRIVATE KEY-----
 `
 
-	file, err := ioutil.TempFile("", "pkey")
+	file, err := os.CreateTemp("", "pkey")
 	if err != nil {
 		t.Fatal("File cannot be created")
 	}
diff --git a/registry/storage/driver/middleware/cloudfront/s3filter.go b/registry/storage/driver/middleware/cloudfront/s3filter.go
index c7eb56a3..6b02d29d 100644
--- a/registry/storage/driver/middleware/cloudfront/s3filter.go
+++ b/registry/storage/driver/middleware/cloudfront/s3filter.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"net/http"
 	"strings"
@@ -68,7 +68,7 @@ func fetchAWSIPs(url string) (awsIPResponse, error) {
 		return response, err
 	}
 	if resp.StatusCode != 200 {
-		body, _ := ioutil.ReadAll(resp.Body)
+		body, _ := io.ReadAll(resp.Body)
 		return response, fmt.Errorf("failed to fetch network data. response = %s", body)
 	}
 	decoder := json.NewDecoder(resp.Body)
diff --git a/registry/storage/driver/oss/oss.go b/registry/storage/driver/oss/oss.go
index aa5b56d2..0c5f76f0 100644
--- a/registry/storage/driver/oss/oss.go
+++ b/registry/storage/driver/oss/oss.go
@@ -17,7 +17,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"reflect"
 	"strconv"
@@ -273,7 +272,7 @@ func (d *driver) Reader(ctx context.Context, path string, offset int64) (io.Read
 	// OSS sever will always return http.StatusPartialContent if range is acceptable.
 	if resp.StatusCode != http.StatusPartialContent {
 		resp.Body.Close()
-		return ioutil.NopCloser(bytes.NewReader(nil)), nil
+		return io.NopCloser(bytes.NewReader(nil)), nil
 	}
 
 	return resp.Body, nil
diff --git a/registry/storage/driver/oss/oss_test.go b/registry/storage/driver/oss/oss_test.go
index f1e4a607..a23e166a 100644
--- a/registry/storage/driver/oss/oss_test.go
+++ b/registry/storage/driver/oss/oss_test.go
@@ -4,7 +4,6 @@
 package oss
 
 import (
-	"io/ioutil"
 	"os"
 	"strconv"
 	"testing"
@@ -36,7 +35,7 @@ func init() {
 		encryptionKeyID = os.Getenv("OSS_ENCRYPTIONKEYID")
 	)
 
-	root, err := ioutil.TempDir("", "driver-")
+	root, err := os.MkdirTemp("", "driver-")
 	if err != nil {
 		panic(err)
 	}
@@ -102,11 +101,7 @@ func TestEmptyRootList(t *testing.T) {
 		t.Skip(skipCheck())
 	}
 
-	validRoot, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(validRoot)
+	validRoot := t.TempDir()
 
 	rootedDriver, err := ossDriverConstructor(validRoot)
 	if err != nil {
diff --git a/registry/storage/driver/s3-aws/s3.go b/registry/storage/driver/s3-aws/s3.go
index c3d86bb8..8b6e213e 100644
--- a/registry/storage/driver/s3-aws/s3.go
+++ b/registry/storage/driver/s3-aws/s3.go
@@ -18,7 +18,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math"
 	"net/http"
 	"path/filepath"
@@ -607,7 +606,7 @@ func (d *driver) GetContent(ctx context.Context, path string) ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
-	return ioutil.ReadAll(reader)
+	return io.ReadAll(reader)
 }
 
 // PutContent stores the []byte content at a location designated by "path".
@@ -635,7 +634,7 @@ func (d *driver) Reader(ctx context.Context, path string, offset int64) (io.Read
 	})
 	if err != nil {
 		if s3Err, ok := err.(awserr.Error); ok && s3Err.Code() == "InvalidRange" {
-			return ioutil.NopCloser(bytes.NewReader(nil)), nil
+			return io.NopCloser(bytes.NewReader(nil)), nil
 		}
 
 		return nil, parseError(path, err)
@@ -1356,7 +1355,7 @@ func (w *writer) Write(p []byte) (int, error) {
 			}
 			defer resp.Body.Close()
 			w.parts = nil
-			w.readyPart, err = ioutil.ReadAll(resp.Body)
+			w.readyPart, err = io.ReadAll(resp.Body)
 			if err != nil {
 				return 0, err
 			}
diff --git a/registry/storage/driver/s3-aws/s3_test.go b/registry/storage/driver/s3-aws/s3_test.go
index d9dbb722..0c79a009 100644
--- a/registry/storage/driver/s3-aws/s3_test.go
+++ b/registry/storage/driver/s3-aws/s3_test.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"math/rand"
 	"os"
 	"path"
@@ -52,7 +51,7 @@ func init() {
 		accelerate       = os.Getenv("S3_ACCELERATE")
 	)
 
-	root, err := ioutil.TempDir("", "driver-")
+	root, err := os.MkdirTemp("", "driver-")
 	if err != nil {
 		panic(err)
 	}
@@ -166,12 +165,7 @@ func TestEmptyRootList(t *testing.T) {
 		t.Skip(skipS3())
 	}
 
-	validRoot, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(validRoot)
-
+	validRoot := t.TempDir()
 	rootedDriver, err := s3DriverConstructor(validRoot, s3.StorageClassStandard)
 	if err != nil {
 		t.Fatalf("unexpected error creating rooted driver: %v", err)
@@ -204,9 +198,9 @@ func TestEmptyRootList(t *testing.T) {
 	}
 
 	keys, _ = slashRootDriver.List(ctx, "/")
-	for _, path := range keys {
-		if !storagedriver.PathRegexp.MatchString(path) {
-			t.Fatalf("unexpected string in path: %q != %q", path, storagedriver.PathRegexp)
+	for _, p := range keys {
+		if !storagedriver.PathRegexp.MatchString(p) {
+			t.Fatalf("unexpected string in path: %q != %q", p, storagedriver.PathRegexp)
 		}
 	}
 }
@@ -249,12 +243,7 @@ func TestStorageClass(t *testing.T) {
 		t.Skip(skipS3())
 	}
 
-	rootDir, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(rootDir)
-
+	rootDir := t.TempDir()
 	contents := []byte("contents")
 	ctx := context.Background()
 	for _, storageClass := range s3StorageClasses {
@@ -307,13 +296,9 @@ func TestDelete(t *testing.T) {
 		t.Skip(skipS3())
 	}
 
-	rootDir, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(rootDir)
+	rootDir := t.TempDir()
 
-	driver, err := s3DriverConstructor(rootDir, s3.StorageClassStandard)
+	drvr, err := s3DriverConstructor(rootDir, s3.StorageClassStandard)
 	if err != nil {
 		t.Fatalf("unexpected error creating driver with standard storage: %v", err)
 	}
@@ -421,35 +406,35 @@ func TestDelete(t *testing.T) {
 		"/file1": true,
 	}
 	// create a test case for each file
-	for _, path := range objs {
-		if skipCase[path] {
+	for _, p := range objs {
+		if skipCase[p] {
 			continue
 		}
 		tcs = append(tcs, testCase{
-			name:     fmt.Sprintf("delete path:'%s'", path),
-			delete:   path,
-			expected: []string{path},
+			name:     fmt.Sprintf("delete path:'%s'", p),
+			delete:   p,
+			expected: []string{p},
 		})
 	}
 
 	init := func() []string {
 		// init file structure matching objs
 		var created []string
-		for _, path := range objs {
-			err := driver.PutContent(context.Background(), path, []byte("content "+path))
+		for _, p := range objs {
+			err := drvr.PutContent(context.Background(), p, []byte("content "+p))
 			if err != nil {
-				fmt.Printf("unable to init file %s: %s\n", path, err)
+				fmt.Printf("unable to init file %s: %s\n", p, err)
 				continue
 			}
-			created = append(created, path)
+			created = append(created, p)
 		}
 		return created
 	}
 
 	cleanup := func(objs []string) {
 		var lastErr error
-		for _, path := range objs {
-			err := driver.Delete(context.Background(), path)
+		for _, p := range objs {
+			err := drvr.Delete(context.Background(), p)
 			if err != nil {
 				switch err.(type) {
 				case storagedriver.PathNotFoundError:
@@ -468,7 +453,7 @@ func TestDelete(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			objs := init()
 
-			err := driver.Delete(context.Background(), tc.delete)
+			err := drvr.Delete(context.Background(), tc.delete)
 
 			if tc.err != nil {
 				if err == nil {
@@ -496,7 +481,7 @@ func TestDelete(t *testing.T) {
 				return false
 			}
 			for _, path := range objs {
-				stat, err := driver.Stat(context.Background(), path)
+				stat, err := drvr.Stat(context.Background(), path)
 				if err != nil {
 					switch err.(type) {
 					case storagedriver.PathNotFoundError:
@@ -530,13 +515,9 @@ func TestWalk(t *testing.T) {
 		t.Skip(skipS3())
 	}
 
-	rootDir, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(rootDir)
+	rootDir := t.TempDir()
 
-	driver, err := s3DriverConstructor(rootDir, s3.StorageClassStandard)
+	drvr, err := s3DriverConstructor(rootDir, s3.StorageClassStandard)
 	if err != nil {
 		t.Fatalf("unexpected error creating driver with standard storage: %v", err)
 	}
@@ -552,22 +533,22 @@ func TestWalk(t *testing.T) {
 
 	// create file structure matching fileset above
 	var created []string
-	for _, path := range fileset {
-		err := driver.PutContent(context.Background(), path, []byte("content "+path))
+	for _, p := range fileset {
+		err := drvr.PutContent(context.Background(), p, []byte("content "+p))
 		if err != nil {
-			fmt.Printf("unable to create file %s: %s\n", path, err)
+			fmt.Printf("unable to create file %s: %s\n", p, err)
 			continue
 		}
-		created = append(created, path)
+		created = append(created, p)
 	}
 
 	// cleanup
 	defer func() {
 		var lastErr error
-		for _, path := range created {
-			err := driver.Delete(context.Background(), path)
+		for _, p := range created {
+			err := drvr.Delete(context.Background(), p)
 			if err != nil {
-				_ = fmt.Errorf("cleanup failed for path %s: %s", path, err)
+				_ = fmt.Errorf("cleanup failed for path %s: %s", p, err)
 				lastErr = err
 			}
 		}
@@ -669,7 +650,7 @@ func TestWalk(t *testing.T) {
 			tc.from = "/"
 		}
 		t.Run(tc.name, func(t *testing.T) {
-			err := driver.Walk(context.Background(), tc.from, func(fileInfo storagedriver.FileInfo) error {
+			err := drvr.Walk(context.Background(), tc.from, func(fileInfo storagedriver.FileInfo) error {
 				walked = append(walked, fileInfo.Path())
 				return tc.fn(fileInfo)
 			})
@@ -689,12 +670,7 @@ func TestOverThousandBlobs(t *testing.T) {
 		t.Skip(skipS3())
 	}
 
-	rootDir, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(rootDir)
-
+	rootDir := t.TempDir()
 	standardDriver, err := s3DriverConstructor(rootDir, s3.StorageClassStandard)
 	if err != nil {
 		t.Fatalf("unexpected error creating driver with standard storage: %v", err)
@@ -722,12 +698,7 @@ func TestMoveWithMultipartCopy(t *testing.T) {
 		t.Skip(skipS3())
 	}
 
-	rootDir, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(rootDir)
-
+	rootDir := t.TempDir()
 	d, err := s3DriverConstructor(rootDir, s3.StorageClassStandard)
 	if err != nil {
 		t.Fatalf("unexpected error creating driver: %v", err)
@@ -776,12 +747,7 @@ func TestListObjectsV2(t *testing.T) {
 		t.Skip(skipS3())
 	}
 
-	rootDir, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(rootDir)
-
+	rootDir := t.TempDir()
 	d, err := s3DriverConstructor(rootDir, s3.StorageClassStandard)
 	if err != nil {
 		t.Fatalf("unexpected error creating driver: %v", err)
@@ -794,8 +760,8 @@ func TestListObjectsV2(t *testing.T) {
 	for i := 0; i < n; i++ {
 		filePaths = append(filePaths, fmt.Sprintf("%s/%d", prefix, i))
 	}
-	for _, path := range filePaths {
-		if err := d.PutContent(ctx, path, []byte(path)); err != nil {
+	for _, p := range filePaths {
+		if err := d.PutContent(ctx, p, []byte(p)); err != nil {
 			t.Fatalf("unexpected error putting content: %v", err)
 		}
 	}
diff --git a/registry/storage/driver/swift/swift.go b/registry/storage/driver/swift/swift.go
index 753c9992..b5c4dcd4 100644
--- a/registry/storage/driver/swift/swift.go
+++ b/registry/storage/driver/swift/swift.go
@@ -25,7 +25,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"strconv"
@@ -336,7 +335,7 @@ func (d *driver) Reader(ctx context.Context, path string, offset int64) (io.Read
 				return nil, storagedriver.PathNotFoundError{Path: path}
 			}
 			if swiftErr, ok := err.(*swift.Error); ok && swiftErr.StatusCode == http.StatusRequestedRangeNotSatisfiable {
-				return ioutil.NopCloser(bytes.NewReader(nil)), nil
+				return io.NopCloser(bytes.NewReader(nil)), nil
 			}
 			return file, err
 		}
diff --git a/registry/storage/driver/swift/swift_test.go b/registry/storage/driver/swift/swift_test.go
index af1d78ba..6b4342dd 100644
--- a/registry/storage/driver/swift/swift_test.go
+++ b/registry/storage/driver/swift/swift_test.go
@@ -1,7 +1,6 @@
 package swift
 
 import (
-	"io/ioutil"
 	"os"
 	"reflect"
 	"strconv"
@@ -58,7 +57,7 @@ func init() {
 		container = "test"
 	}
 
-	prefix, err := ioutil.TempDir("", "driver-")
+	prefix, err := os.MkdirTemp("", "driver-")
 	if err != nil {
 		panic(err)
 	}
@@ -100,11 +99,7 @@ func init() {
 }
 
 func TestEmptyRootList(t *testing.T) {
-	validRoot, err := ioutil.TempDir("", "driver-")
-	if err != nil {
-		t.Fatalf("unexpected error creating temporary directory: %v", err)
-	}
-	defer os.Remove(validRoot)
+	validRoot := t.TempDir()
 
 	rootedDriver, err := swiftDriverConstructor(validRoot)
 	if err != nil {
diff --git a/registry/storage/driver/testsuites/testsuites.go b/registry/storage/driver/testsuites/testsuites.go
index 4c4c15f6..58f6b6d6 100644
--- a/registry/storage/driver/testsuites/testsuites.go
+++ b/registry/storage/driver/testsuites/testsuites.go
@@ -5,7 +5,6 @@ import (
 	"context"
 	"crypto/sha256"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"net/http"
 	"os"
@@ -325,7 +324,7 @@ func (suite *DriverSuite) TestReaderWithOffset(c *check.C) {
 	c.Assert(err, check.IsNil)
 	defer reader.Close()
 
-	readContents, err := ioutil.ReadAll(reader)
+	readContents, err := io.ReadAll(reader)
 	c.Assert(err, check.IsNil)
 
 	c.Assert(readContents, check.DeepEquals, append(append(contentsChunk1, contentsChunk2...), contentsChunk3...))
@@ -334,7 +333,7 @@ func (suite *DriverSuite) TestReaderWithOffset(c *check.C) {
 	c.Assert(err, check.IsNil)
 	defer reader.Close()
 
-	readContents, err = ioutil.ReadAll(reader)
+	readContents, err = io.ReadAll(reader)
 	c.Assert(err, check.IsNil)
 
 	c.Assert(readContents, check.DeepEquals, append(contentsChunk2, contentsChunk3...))
@@ -343,7 +342,7 @@ func (suite *DriverSuite) TestReaderWithOffset(c *check.C) {
 	c.Assert(err, check.IsNil)
 	defer reader.Close()
 
-	readContents, err = ioutil.ReadAll(reader)
+	readContents, err = io.ReadAll(reader)
 	c.Assert(err, check.IsNil)
 	c.Assert(readContents, check.DeepEquals, contentsChunk3)
 
@@ -643,7 +642,7 @@ func (suite *DriverSuite) TestURLFor(c *check.C) {
 	c.Assert(err, check.IsNil)
 	defer response.Body.Close()
 
-	read, err := ioutil.ReadAll(response.Body)
+	read, err := io.ReadAll(response.Body)
 	c.Assert(err, check.IsNil)
 	c.Assert(read, check.DeepEquals, contents)
 
@@ -874,7 +873,7 @@ func (suite *DriverSuite) TestConcurrentStreamReads(c *check.C) {
 		reader, err := suite.StorageDriver.Reader(suite.ctx, filename, offset)
 		c.Assert(err, check.IsNil)
 
-		readContents, err := ioutil.ReadAll(reader)
+		readContents, err := io.ReadAll(reader)
 		c.Assert(err, check.IsNil)
 		c.Assert(readContents, check.DeepEquals, contents[offset:])
 	}
@@ -941,7 +940,7 @@ func (suite *DriverSuite) TestConcurrentFileStreams(c *check.C) {
 // 			reader, err := suite.StorageDriver.Reader(suite.ctx, filename, offset)
 // 			c.Assert(err, check.IsNil)
 //
-// 			readContents, err := ioutil.ReadAll(reader)
+// 			readContents, err := io.ReadAll(reader)
 // 			c.Assert(err, check.IsNil)
 //
 // 			c.Assert(readContents, check.DeepEquals, contents)
@@ -1104,7 +1103,7 @@ func (suite *DriverSuite) benchmarkDeleteFiles(c *check.C, numFiles int64) {
 }
 
 func (suite *DriverSuite) testFileStreams(c *check.C, size int64) {
-	tf, err := ioutil.TempFile("", "tf")
+	tf, err := os.CreateTemp("", "tf")
 	c.Assert(err, check.IsNil)
 	defer os.Remove(tf.Name())
 	defer tf.Close()
@@ -1135,7 +1134,7 @@ func (suite *DriverSuite) testFileStreams(c *check.C, size int64) {
 	c.Assert(err, check.IsNil)
 	defer reader.Close()
 
-	readContents, err := ioutil.ReadAll(reader)
+	readContents, err := io.ReadAll(reader)
 	c.Assert(err, check.IsNil)
 
 	c.Assert(readContents, check.DeepEquals, contents)
@@ -1171,7 +1170,7 @@ func (suite *DriverSuite) writeReadCompareStreams(c *check.C, filename string, c
 	c.Assert(err, check.IsNil)
 	defer reader.Close()
 
-	readContents, err := ioutil.ReadAll(reader)
+	readContents, err := io.ReadAll(reader)
 	c.Assert(err, check.IsNil)
 
 	c.Assert(readContents, check.DeepEquals, contents)
diff --git a/registry/storage/filereader.go b/registry/storage/filereader.go
index 031204bd..b5004eb4 100644
--- a/registry/storage/filereader.go
+++ b/registry/storage/filereader.go
@@ -6,7 +6,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 
 	storagedriver "github.com/distribution/distribution/v3/registry/storage/driver"
 )
@@ -126,7 +125,7 @@ func (fr *fileReader) reader() (io.Reader, error) {
 			// reader that returns io.EOF. However, we do not set fr.rc,
 			// allowing future attempts at getting a reader to possibly
 			// succeed if the file turns up later.
-			return ioutil.NopCloser(bytes.NewReader([]byte{})), nil
+			return io.NopCloser(bytes.NewReader([]byte{})), nil
 		default:
 			return nil, err
 		}
diff --git a/registry/storage/io.go b/registry/storage/io.go
index 561704ae..a96296e5 100644
--- a/registry/storage/io.go
+++ b/registry/storage/io.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"io"
-	"io/ioutil"
 
 	"github.com/distribution/distribution/v3/registry/storage/driver"
 )
@@ -25,7 +24,7 @@ func getContent(ctx context.Context, driver driver.StorageDriver, p string) ([]b
 
 func readAllLimited(r io.Reader, limit int64) ([]byte, error) {
 	r = limitReader(r, limit)
-	return ioutil.ReadAll(r)
+	return io.ReadAll(r)
 }
 
 // limitReader returns a new reader limited to n bytes. Unlike io.LimitReader,
diff --git a/testutil/handler.go b/testutil/handler.go
index 00cd8a6a..9e691106 100644
--- a/testutil/handler.go
+++ b/testutil/handler.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"sort"
@@ -111,7 +110,7 @@ func NewHandler(requestResponseMap RequestResponseMap) http.Handler {
 func (app *testHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	defer r.Body.Close()
 
-	requestBody, _ := ioutil.ReadAll(r.Body)
+	requestBody, _ := io.ReadAll(r.Body)
 	request := Request{
 		Method:      r.Method,
 		Route:       r.URL.Path,