Handle rand deprecations in go 1.20

Signed-off-by: James Hewitt <james.hewitt@uk.ibm.com>

registry/api/v2/routes_test.go

@@ -9,7 +9,6 @@ import (
 	"reflect"
 	"strings"
 	"testing"
-	"time"
 
 	"github.com/gorilla/mux"
 )
@@ -221,7 +220,6 @@ func TestRouterWithBadCharacters(t *testing.T) {
 		// with random UTF8 characters not in the 128 bit ASCII range.
 		// These are not valid characters for the router and we expect
 		// 404s on every test.
-		rand.Seed(time.Now().UTC().UnixNano())
 		tests := make([]routeTestCase, 1000)
 		for idx := range tests {
 			tests[idx] = routeTestCase{

registry/proxy/proxyblobstore_test.go

@@ -21,6 +21,7 @@ import (
 )
 
 var sbsMu sync.Mutex
+var randSource rand.Rand
 
 type statsBlobStore struct {
 	stats map[string]int
@@ -189,13 +190,13 @@ func makeTestEnv(t *testing.T, name string) *testEnv {
 func makeBlob(size int) []byte {
 	blob := make([]byte, size)
 	for i := 0; i < size; i++ {
-		blob[i] = byte('A' + rand.Int()%48)
+		blob[i] = byte('A' + randSource.Int()%48)
 	}
 	return blob
 }
 
 func init() {
-	rand.Seed(42)
+	randSource = *rand.New(rand.NewSource(42))
 }
 
 func populate(t *testing.T, te *testEnv, blobCount, size, numUnique int) {

registry/storage/driver/s3-aws/s3_test.go

@@ -2,9 +2,9 @@ package s3
 
 import (
 	"bytes"
+	"crypto/rand"
 	"errors"
 	"fmt"
-	"math/rand"
 	"os"
 	"path"
 	"reflect"

registry/storage/driver/testsuites/testsuites.go

@@ -3,6 +3,7 @@ package testsuites
 import (
 	"bytes"
 	"context"
+	crand "crypto/rand"
 	"crypto/sha256"
 	"io"
 	"math/rand"
@@ -1232,7 +1233,7 @@ func randomFilename(length int64) string {
 var randomBytes = make([]byte, 128<<20)
 
 func init() {
-	_, _ = rand.Read(randomBytes) // always returns len(randomBytes) and nil error
+	_, _ = crand.Read(randomBytes) // always returns len(randomBytes) and nil error
 }
 
 func randomContents(length int64) []byte {

registry/storage/filereader_test.go

@@ -2,6 +2,7 @@ package storage
 
 import (
 	"bytes"
+	crand "crypto/rand"
 	"io"
 	mrand "math/rand"
 	"testing"
@@ -14,7 +15,7 @@ import (
 func TestSimpleRead(t *testing.T) {
 	ctx := context.Background()
 	content := make([]byte, 1<<20)
-	n, err := mrand.Read(content)
+	n, err := crand.Read(content)
 	if err != nil {
 		t.Fatalf("unexpected error building random data: %v", err)
 	}