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package layout
import (
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"io"
"net/http"
"net/http/httptest"
"os"
"strings"
"testing"
"github.com/containers/image/v5/internal/private"
"github.com/containers/image/v5/pkg/blobinfocache/memory"
"github.com/containers/image/v5/types"
digest "github.com/opencontainers/go-digest"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var _ private.ImageSource = (*ociImageSource)(nil)
const RemoteLayerContent = "This is the remote layer content"
var httpServerAddr string
func TestMain(m *testing.M) {
httpServer, err := startRemoteLayerServer()
if err != nil {
fmt.Fprintf(os.Stderr, "Error starting test TLS server: %v", err.Error())
os.Exit(1)
}
httpServerAddr = strings.Replace(httpServer.URL, "127.0.0.1", "localhost", 1)
code := m.Run()
httpServer.Close()
os.Exit(code)
}
func TestGetBlobForRemoteLayers(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "Hello world")
}))
defer ts.Close()
cache := memory.New()
imageSource := createImageSource(t, &types.SystemContext{})
defer imageSource.Close()
layerInfo := types.BlobInfo{
Digest: digest.FromBytes([]byte("Hello world")),
Size: -1,
URLs: []string{
"brokenurl",
ts.URL,
},
}
reader, _, err := imageSource.GetBlob(context.Background(), layerInfo, cache)
require.NoError(t, err)
defer reader.Close()
data, err := io.ReadAll(reader)
require.NoError(t, err)
assert.Contains(t, string(data), "Hello world")
}
func TestGetBlobForRemoteLayersWithTLS(t *testing.T) {
imageSource := createImageSource(t, &types.SystemContext{
OCICertPath: "fixtures/accepted_certs",
})
defer imageSource.Close()
cache := memory.New()
layer, size, err := imageSource.GetBlob(context.Background(), types.BlobInfo{
URLs: []string{httpServerAddr},
}, cache)
require.NoError(t, err)
layerContent, _ := io.ReadAll(layer)
assert.Equal(t, RemoteLayerContent, string(layerContent))
assert.Equal(t, int64(len(RemoteLayerContent)), size)
}
func TestGetBlobForRemoteLayersOnTLSFailure(t *testing.T) {
imageSource := createImageSource(t, &types.SystemContext{
OCICertPath: "fixtures/rejected_certs",
})
defer imageSource.Close()
cache := memory.New()
layer, size, err := imageSource.GetBlob(context.Background(), types.BlobInfo{
URLs: []string{httpServerAddr},
}, cache)
require.Error(t, err)
assert.Nil(t, layer)
assert.Equal(t, int64(0), size)
}
func remoteLayerContent(w http.ResponseWriter, req *http.Request) {
fmt.Fprint(w, RemoteLayerContent)
}
func startRemoteLayerServer() (*httptest.Server, error) {
certBytes, err := os.ReadFile("fixtures/accepted_certs/cert.cert")
if err != nil {
return nil, err
}
clientCertPool := x509.NewCertPool()
if !clientCertPool.AppendCertsFromPEM(certBytes) {
return nil, fmt.Errorf("Could not append certificate")
}
cert, err := tls.LoadX509KeyPair("fixtures/accepted_certs/cert.cert", "fixtures/accepted_certs/cert.key")
if err != nil {
return nil, err
}
tlsConfig := &tls.Config{
// Reject any TLS certificate that cannot be validated
ClientAuth: tls.RequireAndVerifyClientCert,
// Ensure that we only use our "CA" to validate certificates
ClientCAs: clientCertPool,
Certificates: []tls.Certificate{cert},
}
httpServer := httptest.NewUnstartedServer(http.HandlerFunc(remoteLayerContent))
httpServer.TLS = tlsConfig
httpServer.StartTLS()
return httpServer, nil
}
func createImageSource(t *testing.T, sys *types.SystemContext) types.ImageSource {
imageRef, err := NewReference("fixtures/manifest", "")
require.NoError(t, err)
imageSource, err := imageRef.NewImageSource(context.Background(), sys)
require.NoError(t, err)
return imageSource
}
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