Add support for Fulcio and Rekor, and --sign-by-sigstore=param-file

(skopeo copy) and (skopeo sync) now support --sign-by-sigstore=param-file,
using the containers-sigstore-signing-params.yaml(5) file format.

That notably adds support for Fulcio and Rekor signing.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

vendor/github.com/go-openapi/runtime/middleware/doc.go

@@ -0,0 +1,62 @@
+// Copyright 2015 go-swagger maintainers
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*Package middleware provides the library with helper functions for serving swagger APIs.
+
+Pseudo middleware handler
+
+  import (
+  	"net/http"
+
+  	"github.com/go-openapi/errors"
+  )
+
+  func newCompleteMiddleware(ctx *Context) http.Handler {
+  	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+  		// use context to lookup routes
+  		if matched, ok := ctx.RouteInfo(r); ok {
+
+  			if matched.NeedsAuth() {
+  				if _, err := ctx.Authorize(r, matched); err != nil {
+  					ctx.Respond(rw, r, matched.Produces, matched, err)
+  					return
+  				}
+  			}
+
+  			bound, validation := ctx.BindAndValidate(r, matched)
+  			if validation != nil {
+  				ctx.Respond(rw, r, matched.Produces, matched, validation)
+  				return
+  			}
+
+  			result, err := matched.Handler.Handle(bound)
+  			if err != nil {
+  				ctx.Respond(rw, r, matched.Produces, matched, err)
+  				return
+  			}
+
+  			ctx.Respond(rw, r, matched.Produces, matched, result)
+  			return
+  		}
+
+  		// Not found, check if it exists in the other methods first
+  		if others := ctx.AllowedMethods(r); len(others) > 0 {
+  			ctx.Respond(rw, r, ctx.spec.RequiredProduces(), nil, errors.MethodNotAllowed(r.Method, others))
+  			return
+  		}
+  		ctx.Respond(rw, r, ctx.spec.RequiredProduces(), nil, errors.NotFound("path %s was not found", r.URL.Path))
+  	})
+  }
+*/
+package middleware