sdk: add identity token helpers to consistently apply fields in plugi…

…ns (#24925)

changelog/24925.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+sdk: Add identity token helpers to consistently apply new plugin WIF fields across integrations.
+```

sdk/helper/pluginidentityutil/fields.go

@@ -0,0 +1,70 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+package pluginidentityutil
+
+import (
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/hashicorp/vault/sdk/framework"
+)
+
+// PluginIdentityTokenParams contains a set of common parameters that plugins
+// can use for setting plugin identity token behavior.
+type PluginIdentityTokenParams struct {
+	// IdentityTokenTTL is the duration that tokens will be valid for
+	IdentityTokenTTL time.Duration `json:"identity_token_ttl"`
+	// IdentityTokenAudience identifies the recipient of the token
+	IdentityTokenAudience string `json:"identity_token_audience"`
+}
+
+// ParsePluginIdentityTokenFields provides common field parsing to embedding structs.
+func (p *PluginIdentityTokenParams) ParsePluginIdentityTokenFields(d *framework.FieldData) error {
+	if tokenTTLRaw, ok := d.GetOk("identity_token_ttl"); ok {
+		p.IdentityTokenTTL = time.Duration(tokenTTLRaw.(int)) * time.Second
+	}
+	if p.IdentityTokenTTL == 0 {
+		p.IdentityTokenTTL = time.Hour
+	}
+
+	if tokenAudienceRaw, ok := d.GetOk("identity_token_audience"); ok {
+		p.IdentityTokenAudience = tokenAudienceRaw.(string)
+	}
+	if p.IdentityTokenAudience == "" {
+		return errors.New("missing required identity_token_audience")
+	}
+
+	return nil
+}
+
+// PopulatePluginIdentityTokenData adds PluginIdentityTokenParams info into the given map.
+func (p *PluginIdentityTokenParams) PopulatePluginIdentityTokenData(m map[string]interface{}) {
+	m["identity_token_ttl"] = int64(p.IdentityTokenTTL.Seconds())
+	m["identity_token_audience"] = p.IdentityTokenAudience
+}
+
+// AddPluginIdentityTokenFields adds plugin identity token fields to the given
+// field schema map.
+func AddPluginIdentityTokenFields(m map[string]*framework.FieldSchema) {
+	fields := map[string]*framework.FieldSchema{
+		"identity_token_audience": {
+			Type:        framework.TypeString,
+			Description: "Audience of plugin identity tokens",
+			Default:     "",
+		},
+		"identity_token_ttl": {
+			Type:        framework.TypeDurationSecond,
+			Description: "Time-to-live of plugin identity tokens",
+			Default:     3600,
+		},
+	}
+
+	for name, schema := range fields {
+		if _, ok := m[name]; ok {
+			panic(fmt.Sprintf("adding field %q would overwrite existing field", name))
+		}
+		m[name] = schema
+	}
+}

sdk/helper/pluginidentityutil/fields_test.go

@@ -0,0 +1,172 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+package pluginidentityutil
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/hashicorp/vault/sdk/framework"
+)
+
+const (
+	fieldIDTokenTTL      = "identity_token_ttl"
+	fieldIDTokenAudience = "identity_token_audience"
+)
+
+func identityTokenFieldData(raw map[string]interface{}) *framework.FieldData {
+	return &framework.FieldData{
+		Raw: raw,
+		Schema: map[string]*framework.FieldSchema{
+			fieldIDTokenTTL: {
+				Type: framework.TypeDurationSecond,
+			},
+			fieldIDTokenAudience: {
+				Type: framework.TypeString,
+			},
+		},
+	}
+}
+
+func TestParsePluginIdentityTokenFields(t *testing.T) {
+	testcases := []struct {
+		name    string
+		d       *framework.FieldData
+		wantErr bool
+		want    map[string]interface{}
+	}{
+		{
+			name: "basic",
+			d: identityTokenFieldData(map[string]interface{}{
+				fieldIDTokenTTL:      10,
+				fieldIDTokenAudience: "test-aud",
+			}),
+			want: map[string]interface{}{
+				fieldIDTokenTTL:      time.Duration(10) * time.Second,
+				fieldIDTokenAudience: "test-aud",
+			},
+		},
+		{
+			name: "empty-ttl",
+			d: identityTokenFieldData(map[string]interface{}{
+				fieldIDTokenAudience: "test-aud",
+			}),
+			want: map[string]interface{}{
+				fieldIDTokenTTL:      time.Hour,
+				fieldIDTokenAudience: "test-aud",
+			},
+		},
+		{
+			name:    "empty-audience",
+			d:       identityTokenFieldData(map[string]interface{}{}),
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range testcases {
+		t.Run(tt.name, func(t *testing.T) {
+			p := new(PluginIdentityTokenParams)
+			err := p.ParsePluginIdentityTokenFields(tt.d)
+			if tt.wantErr {
+				assert.Error(t, err)
+				return
+			}
+			got := map[string]interface{}{
+				fieldIDTokenTTL:      p.IdentityTokenTTL,
+				fieldIDTokenAudience: p.IdentityTokenAudience,
+			}
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}
+
+func TestPopulatePluginIdentityTokenData(t *testing.T) {
+	testcases := []struct {
+		name string
+		p    *PluginIdentityTokenParams
+		want map[string]interface{}
+	}{
+		{
+			name: "basic",
+			p: &PluginIdentityTokenParams{
+				IdentityTokenAudience: "test-aud",
+				IdentityTokenTTL:      time.Duration(10) * time.Second,
+			},
+			want: map[string]interface{}{
+				fieldIDTokenTTL:      int64(10),
+				fieldIDTokenAudience: "test-aud",
+			},
+		},
+	}
+
+	for _, tt := range testcases {
+		t.Run(tt.name, func(t *testing.T) {
+			got := make(map[string]interface{})
+			tt.p.PopulatePluginIdentityTokenData(got)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}
+
+func TestAddPluginIdentityTokenFields(t *testing.T) {
+	testcases := []struct {
+		name  string
+		input map[string]*framework.FieldSchema
+		want  map[string]*framework.FieldSchema
+	}{
+		{
+			name:  "basic",
+			input: map[string]*framework.FieldSchema{},
+			want: map[string]*framework.FieldSchema{
+				fieldIDTokenAudience: {
+					Type:        framework.TypeString,
+					Description: "Audience of plugin identity tokens",
+					Default:     "",
+				},
+				fieldIDTokenTTL: {
+					Type:        framework.TypeDurationSecond,
+					Description: "Time-to-live of plugin identity tokens",
+					Default:     3600,
+				},
+			},
+		},
+		{
+			name: "additional-fields",
+			input: map[string]*framework.FieldSchema{
+				"test": {
+					Type:        framework.TypeString,
+					Description: "Test description",
+					Default:     "default",
+				},
+			},
+			want: map[string]*framework.FieldSchema{
+				fieldIDTokenAudience: {
+					Type:        framework.TypeString,
+					Description: "Audience of plugin identity tokens",
+					Default:     "",
+				},
+				fieldIDTokenTTL: {
+					Type:        framework.TypeDurationSecond,
+					Description: "Time-to-live of plugin identity tokens",
+					Default:     3600,
+				},
+				"test": {
+					Type:        framework.TypeString,
+					Description: "Test description",
+					Default:     "default",
+				},
+			},
+		},
+	}
+
+	for _, tt := range testcases {
+		t.Run(tt.name, func(t *testing.T) {
+			got := tt.input
+			AddPluginIdentityTokenFields(got)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}