compat handlers: add X-Registry-Auth header support

 * Support the `X-Registry-Auth` http-request header.

 * The content of the header is a base64 encoded JSON payload which can
   either be a single auth config or a map of auth configs (user+pw or
   token) with the corresponding registries being the keys.  Vanilla
   Docker, projectatomic Docker and the bindings are transparantly
   supported.

 * Add a hidden `--registries-conf` flag.  Buildah exposes the same
   flag, mostly for testing purposes.

 * Do all credential parsing in the client (i.e., `cmd/podman`) pass
   the username and password in the backend instead of unparsed
   credentials.

 * Add a `pkg/auth` which handles most of the heavy lifting.

 * Go through the authentication-handling code of most commands, bindings
   and endpoints.  Migrate them to the new code and fix issues as seen.
   A final evaluation and more tests is still required *after* this
   change.

 * The manifest-push endpoint is missing certain parameters and should
   use the ABI function instead.  Adding auth-support isn't really
   possible without these parts working.

 * The container commands and endpoints (i.e., create and run) have not
   been changed yet.  The APIs don't yet account for the authfile.

 * Add authentication tests to `pkg/bindings`.

Fixes: #6384
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

3 files changed, 37 insertions, 12 deletions

diff --git a/pkg/domain/infra/abi/images.go b/pkg/domain/infra/abi/images.go
index 6e774df8e..d8af4d339 100644
--- a/pkg/domain/infra/abi/images.go
+++ b/pkg/domain/infra/abi/images.go
@@ -121,12 +121,11 @@ func (ir *ImageEngine) Pull(ctx context.Context, rawImage string, options entiti
 	}
 
 	var registryCreds *types.DockerAuthConfig
-	if options.Credentials != "" {
-		creds, err := util.ParseRegistryCreds(options.Credentials)
-		if err != nil {
-			return nil, err
+	if len(options.Username) > 0 && len(options.Password) > 0 {
+		registryCreds = &types.DockerAuthConfig{
+			Username: options.Username,
+			Password: options.Password,
 		}
-		registryCreds = creds
 	}
 	dockerRegistryOptions := image.DockerRegistryOptions{
 		DockerRegistryCreds:         registryCreds,
@@ -226,12 +225,11 @@ func (ir *ImageEngine) Push(ctx context.Context, source string, destination stri
 	}
 
 	var registryCreds *types.DockerAuthConfig
-	if options.Credentials != "" {
-		creds, err := util.ParseRegistryCreds(options.Credentials)
-		if err != nil {
-			return err
+	if len(options.Username) > 0 && len(options.Password) > 0 {
+		registryCreds = &types.DockerAuthConfig{
+			Username: options.Username,
+			Password: options.Password,
 		}
-		registryCreds = creds
 	}
 	dockerRegistryOptions := image.DockerRegistryOptions{
 		DockerRegistryCreds:         registryCreds,
diff --git a/pkg/domain/infra/abi/manifest.go b/pkg/domain/infra/abi/manifest.go
index fca34dda2..6e311dec7 100644
--- a/pkg/domain/infra/abi/manifest.go
+++ b/pkg/domain/infra/abi/manifest.go
@@ -16,6 +16,7 @@ import (
 	"github.com/containers/image/v5/docker"
 	"github.com/containers/image/v5/manifest"
 	"github.com/containers/image/v5/transports/alltransports"
+	"github.com/containers/image/v5/types"
 	libpodImage "github.com/containers/libpod/libpod/image"
 	"github.com/containers/libpod/pkg/domain/entities"
 	"github.com/containers/libpod/pkg/util"
@@ -179,12 +180,28 @@ func (ir *ImageEngine) ManifestPush(ctx context.Context, names []string, opts en
 		case "v2s2", "docker":
 			manifestType = manifest.DockerV2Schema2MediaType
 		default:
-			return errors.Errorf("unknown format %q. Choose on of the supported formats: 'oci' or 'v2s2'", opts.Format)
+			return errors.Errorf("unknown format %q. Choose one of the supported formats: 'oci' or 'v2s2'", opts.Format)
 		}
 	}
+
+	// Set the system context.
+	sys := ir.Libpod.SystemContext()
+	if sys != nil {
+		sys = &types.SystemContext{}
+	}
+	sys.AuthFilePath = opts.Authfile
+	sys.DockerInsecureSkipTLSVerify = opts.SkipTLSVerify
+
+	if opts.Username != "" && opts.Password != "" {
+		sys.DockerAuthConfig = &types.DockerAuthConfig{
+			Username: opts.Username,
+			Password: opts.Password,
+		}
+	}
+
 	options := manifests.PushOptions{
 		Store:              ir.Libpod.GetStore(),
-		SystemContext:      ir.Libpod.SystemContext(),
+		SystemContext:      sys,
 		ImageListSelection: cp.CopySpecificImages,
 		Instances:          nil,
 		RemoveSignatures:   opts.RemoveSignatures,
diff --git a/pkg/domain/infra/abi/play.go b/pkg/domain/infra/abi/play.go
index cd7eec7e6..6d0919d2b 100644
--- a/pkg/domain/infra/abi/play.go
+++ b/pkg/domain/infra/abi/play.go
@@ -56,6 +56,9 @@ func (ic *ContainerEngine) PlayKube(ctx context.Context, path string, options en
 		return nil, errors.Wrapf(err, "unable to read %q as YAML", path)
 	}
 
+	// NOTE: pkg/bindings/play is also parsing the file.
+	// A pkg/kube would be nice to refactor and abstract
+	// parts of the K8s-related code.
 	if podYAML.Kind != "Pod" {
 		return nil, errors.Errorf("invalid YAML kind: %q. Pod is the only supported Kubernetes YAML kind", podYAML.Kind)
 	}
@@ -147,6 +150,13 @@ func (ic *ContainerEngine) PlayKube(ctx context.Context, path string, options en
 		writer = os.Stderr
 	}
 
+	if len(options.Username) > 0 && len(options.Password) > 0 {
+		registryCreds = &types.DockerAuthConfig{
+			Username: options.Username,
+			Password: options.Password,
+		}
+	}
+
 	dockerRegistryOptions := image.DockerRegistryOptions{
 		DockerRegistryCreds:         registryCreds,
 		DockerCertPath:              options.CertDir,