File: issuer_test.go

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// Copyright 2023 The Sigstore 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 kubernetes

import (
	"context"
	"encoding/json"
	"testing"

	"github.com/coreos/go-oidc/v3/oidc"
	"github.com/sigstore/fulcio/pkg/config"
	"github.com/sigstore/fulcio/pkg/identity"
)

func TestIssuer(t *testing.T) {
	ctx := context.Background()
	url := "test-issuer-url"
	issuer := Issuer(url)

	// test the Match function
	t.Run("match", func(t *testing.T) {
		if matches := issuer.Match(ctx, url); !matches {
			t.Fatal("expected url to match but it doesn't")
		}
		if matches := issuer.Match(ctx, "some-other-url"); matches {
			t.Fatal("expected match to fail but it didn't")
		}
	})

	t.Run("authenticate", func(t *testing.T) {
		token := &oidc.IDToken{
			Issuer:  "https://iss.example.com",
			Subject: "subject",
		}
		claims, err := json.Marshal(map[string]interface{}{
			"aud": []string{"sigstore"},
			"iss": "https://iss.example.com",
			"kubernetes.io": map[string]interface{}{
				"namespace": "foo",
				"pod": map[string]string{
					"name": "bar",
					"uid":  "2ff0bae1-6b8a-445b-ae03-1f8d2a08d031",
				},
				"serviceaccount": map[string]string{
					"name": "baz",
					"uid":  "5cb6264f-e283-4365-9a1f-d5a15090527e",
				},
			},
			"sub": "system:serviceaccount:foo:baz",
		})
		if err != nil {
			t.Fatal(err)
		}
		withClaims(token, claims)

		identity.Authorize = func(_ context.Context, _ string, _ ...config.InsecureOIDCConfigOption) (*oidc.IDToken, error) {
			return token, nil
		}
		principal, err := issuer.Authenticate(ctx, "token")
		if err != nil {
			t.Fatal(err)
		}

		if principal.Name(ctx) != "subject" {
			t.Fatalf("got unexpected name %s", principal.Name(ctx))
		}
	})
}