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, 43 insertions, 21 deletions

diff --git a/pkg/bindings/images/diff.go b/pkg/bindings/images/diff.go
index cfdd06a97..e2d344ea0 100644
--- a/pkg/bindings/images/diff.go
+++ b/pkg/bindings/images/diff.go
@@ -15,7 +15,7 @@ func Diff(ctx context.Context, nameOrId string) ([]archive.Change, error) {
 		return nil, err
 	}
 
-	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/changes", nil, nameOrId)
+	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/changes", nil, nil, nameOrId)
 	if err != nil {
 		return nil, err
 	}
diff --git a/pkg/bindings/images/images.go b/pkg/bindings/images/images.go
index f9c02d199..e0802a6e1 100644
--- a/pkg/bindings/images/images.go
+++ b/pkg/bindings/images/images.go
@@ -12,6 +12,7 @@ import (
 	"github.com/containers/buildah"
 	"github.com/containers/image/v5/types"
 	"github.com/containers/libpod/pkg/api/handlers"
+	"github.com/containers/libpod/pkg/auth"
 	"github.com/containers/libpod/pkg/bindings"
 	"github.com/containers/libpod/pkg/domain/entities"
 	"github.com/docker/go-units"
@@ -26,7 +27,7 @@ func Exists(ctx context.Context, nameOrID string) (bool, error) {
 	if err != nil {
 		return false, err
 	}
-	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/exists", nil, nameOrID)
+	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/exists", nil, nil, nameOrID)
 	if err != nil {
 		return false, err
 	}
@@ -52,7 +53,7 @@ func List(ctx context.Context, all *bool, filters map[string][]string) ([]*entit
 		}
 		params.Set("filters", strFilters)
 	}
-	response, err := conn.DoRequest(nil, http.MethodGet, "/images/json", params)
+	response, err := conn.DoRequest(nil, http.MethodGet, "/images/json", params, nil)
 	if err != nil {
 		return imageSummary, err
 	}
@@ -71,7 +72,7 @@ func GetImage(ctx context.Context, nameOrID string, size *bool) (*entities.Image
 		params.Set("size", strconv.FormatBool(*size))
 	}
 	inspectedData := entities.ImageInspectReport{}
-	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/json", params, nameOrID)
+	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/json", params, nil, nameOrID)
 	if err != nil {
 		return &inspectedData, err
 	}
@@ -89,7 +90,7 @@ func Tree(ctx context.Context, nameOrId string, whatRequires *bool) (*entities.I
 	if whatRequires != nil {
 		params.Set("size", strconv.FormatBool(*whatRequires))
 	}
-	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/tree", params, nameOrId)
+	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/tree", params, nil, nameOrId)
 	if err != nil {
 		return nil, err
 	}
@@ -103,7 +104,7 @@ func History(ctx context.Context, nameOrID string) ([]*handlers.HistoryResponse,
 	if err != nil {
 		return nil, err
 	}
-	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/history", nil, nameOrID)
+	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/history", nil, nil, nameOrID)
 	if err != nil {
 		return history, err
 	}
@@ -120,7 +121,7 @@ func Load(ctx context.Context, r io.Reader, name *string) (*entities.ImageLoadRe
 	if name != nil {
 		params.Set("reference", *name)
 	}
-	response, err := conn.DoRequest(r, http.MethodPost, "/images/load", params)
+	response, err := conn.DoRequest(r, http.MethodPost, "/images/load", params, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -141,7 +142,7 @@ func Export(ctx context.Context, nameOrID string, w io.Writer, format *string, c
 	if compress != nil {
 		params.Set("compress", strconv.FormatBool(*compress))
 	}
-	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/get", params, nameOrID)
+	response, err := conn.DoRequest(nil, http.MethodGet, "/images/%s/get", params, nil, nameOrID)
 	if err != nil {
 		return err
 	}
@@ -174,7 +175,7 @@ func Prune(ctx context.Context, all *bool, filters map[string][]string) ([]strin
 		}
 		params.Set("filters", stringFilter)
 	}
-	response, err := conn.DoRequest(nil, http.MethodPost, "/images/prune", params)
+	response, err := conn.DoRequest(nil, http.MethodPost, "/images/prune", params, nil)
 	if err != nil {
 		return deleted, err
 	}
@@ -190,7 +191,7 @@ func Tag(ctx context.Context, nameOrID, tag, repo string) error {
 	params := url.Values{}
 	params.Set("tag", tag)
 	params.Set("repo", repo)
-	response, err := conn.DoRequest(nil, http.MethodPost, "/images/%s/tag", params, nameOrID)
+	response, err := conn.DoRequest(nil, http.MethodPost, "/images/%s/tag", params, nil, nameOrID)
 	if err != nil {
 		return err
 	}
@@ -206,7 +207,7 @@ func Untag(ctx context.Context, nameOrID, tag, repo string) error {
 	params := url.Values{}
 	params.Set("tag", tag)
 	params.Set("repo", repo)
-	response, err := conn.DoRequest(nil, http.MethodPost, "/images/%s/untag", params, nameOrID)
+	response, err := conn.DoRequest(nil, http.MethodPost, "/images/%s/untag", params, nil, nameOrID)
 	if err != nil {
 		return err
 	}
@@ -297,7 +298,7 @@ func Build(ctx context.Context, containerFiles []string, options entities.BuildO
 	}
 	//	TODO outputs?
 
-	response, err := conn.DoRequest(tarfile, http.MethodPost, "/build", params)
+	response, err := conn.DoRequest(tarfile, http.MethodPost, "/build", params, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -341,7 +342,7 @@ func Import(ctx context.Context, changes []string, message, reference, u *string
 	if u != nil {
 		params.Set("url", *u)
 	}
-	response, err := conn.DoRequest(r, http.MethodPost, "/images/import", params)
+	response, err := conn.DoRequest(r, http.MethodPost, "/images/import", params, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -359,7 +360,6 @@ func Pull(ctx context.Context, rawImage string, options entities.ImagePullOption
 	}
 	params := url.Values{}
 	params.Set("reference", rawImage)
-	params.Set("credentials", options.Credentials)
 	params.Set("overrideArch", options.OverrideArch)
 	params.Set("overrideOS", options.OverrideOS)
 	if options.SkipTLSVerify != types.OptionalBoolUndefined {
@@ -369,7 +369,13 @@ func Pull(ctx context.Context, rawImage string, options entities.ImagePullOption
 	}
 	params.Set("allTags", strconv.FormatBool(options.AllTags))
 
-	response, err := conn.DoRequest(nil, http.MethodPost, "/images/pull", params)
+	// TODO: have a global system context we can pass around (1st argument)
+	header, err := auth.Header(nil, options.Authfile, options.Username, options.Password)
+	if err != nil {
+		return nil, err
+	}
+
+	response, err := conn.DoRequest(nil, http.MethodPost, "/images/pull", params, header)
 	if err != nil {
 		return nil, err
 	}
@@ -397,8 +403,14 @@ func Push(ctx context.Context, source string, destination string, options entiti
 	if err != nil {
 		return err
 	}
+
+	// TODO: have a global system context we can pass around (1st argument)
+	header, err := auth.Header(nil, options.Authfile, options.Username, options.Password)
+	if err != nil {
+		return err
+	}
+
 	params := url.Values{}
-	params.Set("credentials", options.Credentials)
 	params.Set("destination", destination)
 	if options.SkipTLSVerify != types.OptionalBoolUndefined {
 		// Note: we have to verify if skipped is false.
@@ -407,8 +419,12 @@ func Push(ctx context.Context, source string, destination string, options entiti
 	}
 
 	path := fmt.Sprintf("/images/%s/push", source)
-	_, err = conn.DoRequest(nil, http.MethodPost, path, params)
-	return err
+	response, err := conn.DoRequest(nil, http.MethodPost, path, params, header)
+	if err != nil {
+		return err
+	}
+
+	return response.Process(err)
 }
 
 // Search is the binding for libpod's v2 endpoints for Search images.
@@ -430,7 +446,13 @@ func Search(ctx context.Context, term string, opts entities.ImageSearchOptions)
 		params.Set("tlsVerify", strconv.FormatBool(verifyTLS))
 	}
 
-	response, err := conn.DoRequest(nil, http.MethodGet, "/images/search", params)
+	// TODO: have a global system context we can pass around (1st argument)
+	header, err := auth.Header(nil, opts.Authfile, "", "")
+	if err != nil {
+		return nil, err
+	}
+
+	response, err := conn.DoRequest(nil, http.MethodGet, "/images/search", params, header)
 	if err != nil {
 		return nil, err
 	}
diff --git a/pkg/bindings/images/rm.go b/pkg/bindings/images/rm.go
index 05aa3f9ca..c315bfce7 100644
--- a/pkg/bindings/images/rm.go
+++ b/pkg/bindings/images/rm.go
@@ -30,7 +30,7 @@ func BatchRemove(ctx context.Context, images []string, opts entities.ImageRemove
 		params.Add("images", i)
 	}
 
-	response, err := conn.DoRequest(nil, http.MethodDelete, "/images/remove", params)
+	response, err := conn.DoRequest(nil, http.MethodDelete, "/images/remove", params, nil)
 	if err != nil {
 		return nil, []error{err}
 	}
@@ -52,7 +52,7 @@ func Remove(ctx context.Context, nameOrID string, force bool) (*entities.ImageRe
 
 	params := url.Values{}
 	params.Set("force", strconv.FormatBool(force))
-	response, err := conn.DoRequest(nil, http.MethodDelete, "/images/%s", params, nameOrID)
+	response, err := conn.DoRequest(nil, http.MethodDelete, "/images/%s", params, nil, nameOrID)
 	if err != nil {
 		return nil, err
 	}