spire package with tests

Signed-off-by: pxp928 <parth.psu@gmail.com>

Author: pxp928

go.mod

@@ -16,6 +16,8 @@ require (
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/opencontainers/image-spec v1.0.3-0.20220114050600-8b9d41f48198
 	github.com/pkg/errors v0.9.1
+	github.com/spiffe/go-spiffe/v2 v2.1.0
+	github.com/spiffe/spire-api-sdk v1.3.1
 	github.com/tektoncd/plumbing v0.0.0-20220329085922-d765a5cba75f
 	go.opencensus.io v0.23.0
 	go.uber.org/zap v1.19.1
@@ -31,6 +33,12 @@ require (
 	sigs.k8s.io/yaml v1.3.0
 )
 
+require (
+	github.com/Microsoft/go-winio v0.5.2 // indirect
+	github.com/zeebo/errs v1.2.2 // indirect
+	gopkg.in/square/go-jose.v2 v2.5.1 // indirect
+)
+
 require (
 	cloud.google.com/go/compute v1.5.0 // indirect
 	contrib.go.opencensus.io/exporter/ocagent v0.7.1-0.20200907061046-05415f1de66d // indirect
@@ -115,7 +123,7 @@ require (
 	github.com/shurcooL/graphql v0.0.0-20181231061246-d48a9a75455f // indirect
 	github.com/sirupsen/logrus v1.8.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/stretchr/testify v1.7.0 // indirect
+	github.com/stretchr/testify v1.7.1 // indirect
 	github.com/tektoncd/resolution v0.0.0-20220331203013-e4203c70c5eb
 	github.com/vbatts/tar-split v0.11.2 // indirect
 	go.uber.org/atomic v1.9.0 // indirect
@@ -135,8 +143,8 @@ require (
 	google.golang.org/api v0.70.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/genproto v0.0.0-20220303160752-862486edd9cc // indirect
-	google.golang.org/grpc v1.44.0 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
+	google.golang.org/grpc v1.46.0
+	google.golang.org/protobuf v1.28.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect

go.sum

@@ -0,0 +1,68 @@
+/*
+Copyright 2022 The Tekton Authors
+
+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 config
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+)
+
+// SpireConfig holds the images reference for a number of container images used
+// across tektoncd pipelines.
+type SpireConfig struct {
+	// The trust domain corresponds to the trust root of a SPIFFE identity provider.
+	TrustDomain string
+	// Path to the spire agent socket defined by the CSI driver
+	SocketPath string
+	// Spire server address
+	ServerAddr string
+	// Prefix to attach to the node name when registering it with the spire server
+	NodeAliasPrefix string
+
+	// MockSpire only to be used for testing the controller, will not exhibit
+	// all characteristics of spire since it is only being used in the context
+	// of process memory.
+	MockSpire bool
+}
+
+// Validate returns an error if any image is not set.
+func (c SpireConfig) Validate() error {
+	var unset []string
+	for _, f := range []struct {
+		v, name string
+	}{
+		{c.TrustDomain, "spire-trust-domain"},
+		{c.SocketPath, "spire-socket-path"},
+		{c.ServerAddr, "spire-server-addr"},
+		{c.NodeAliasPrefix, "spire-node-alias-prefix"},
+	} {
+		if f.v == "" {
+			unset = append(unset, f.name)
+		}
+	}
+	if len(unset) > 0 {
+		sort.Strings(unset)
+		return fmt.Errorf("found unset image flags: %s", unset)
+	}
+
+	if !strings.HasPrefix(c.NodeAliasPrefix, "/") {
+		return fmt.Errorf("Spire node alias should start with a /")
+	}
+
+	return nil
+}