Expose unknown fields and duplicate sections as diagnose warnings (#11455)

* Expose unknown fields and duplicate sections as diagnose warnings

* section counts not needed, already handled

* Address PR feedback

* Prune more of the new fields before tests call deep.Equals

* Update go.mod

command/agent/config/config.go

@@ -30,6 +30,20 @@ type Config struct {
 	Templates     []*ctconfig.TemplateConfig `hcl:"templates"`
 }
 
+func (c *Config) Prune() {
+	for _, l := range c.Listeners {
+		l.RawConfig = nil
+	}
+	c.FoundKeys = nil
+	c.UnusedKeys = nil
+	c.SharedConfig.FoundKeys = nil
+	c.SharedConfig.UnusedKeys = nil
+	if c.Telemetry != nil {
+		c.Telemetry.FoundKeys = nil
+		c.Telemetry.UnusedKeys = nil
+	}
+}
+
 type Retry struct {
 	NumRetries int `hcl:"num_retries"`
 }
@@ -131,6 +145,14 @@ func LoadConfig(path string) (*Config, error) {
 		return nil, err
 	}
 
+	// Attribute
+	ast.Walk(obj, func(n ast.Node) (ast.Node, bool) {
+		if k, ok := n.(*ast.ObjectKey); ok {
+			k.Token.Pos.Filename = path
+		}
+		return n, true
+	})
+
 	// Start building the result
 	result := NewConfig()
 	if err := hcl.DecodeObject(result, obj); err != nil {

command/agent/config/config_test.go

@@ -88,9 +88,7 @@ func TestLoadConfigFile_AgentCache(t *testing.T) {
 		},
 	}
 
-	config.Listeners[0].RawConfig = nil
-	config.Listeners[1].RawConfig = nil
-	config.Listeners[2].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -101,9 +99,7 @@ func TestLoadConfigFile_AgentCache(t *testing.T) {
 	}
 	expected.Vault.TLSSkipVerifyRaw = interface{}(true)
 
-	config.Listeners[0].RawConfig = nil
-	config.Listeners[1].RawConfig = nil
-	config.Listeners[2].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -168,6 +164,7 @@ func TestLoadConfigFile(t *testing.T) {
 		},
 	}
 
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -177,6 +174,7 @@ func TestLoadConfigFile(t *testing.T) {
 		t.Fatalf("err: %s", err)
 	}
 
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -218,6 +216,7 @@ func TestLoadConfigFile_Method_Wrapping(t *testing.T) {
 		},
 	}
 
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -248,7 +247,7 @@ func TestLoadConfigFile_AgentCache_NoAutoAuth(t *testing.T) {
 		},
 	}
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -341,7 +340,7 @@ func TestLoadConfigFile_AgentCache_AutoAuth_NoSink(t *testing.T) {
 		},
 	}
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -385,7 +384,7 @@ func TestLoadConfigFile_AgentCache_AutoAuth_Force(t *testing.T) {
 		},
 	}
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -429,7 +428,7 @@ func TestLoadConfigFile_AgentCache_AutoAuth_True(t *testing.T) {
 		},
 	}
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -484,7 +483,7 @@ func TestLoadConfigFile_AgentCache_AutoAuth_False(t *testing.T) {
 		},
 	}
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -523,12 +522,7 @@ func TestLoadConfigFile_AgentCache_Persist(t *testing.T) {
 		},
 	}
 
-	config.Listeners[0].RawConfig = nil
-	if diff := deep.Equal(config, expected); diff != nil {
-		t.Fatal(diff)
-	}
-
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -644,6 +638,7 @@ func TestLoadConfigFile_Template(t *testing.T) {
 				Templates: tc.expectedTemplates,
 			}
 
+			config.Prune()
 			if diff := deep.Equal(config, expected); diff != nil {
 				t.Fatal(diff)
 			}
@@ -744,6 +739,7 @@ func TestLoadConfigFile_Template_NoSinks(t *testing.T) {
 				},
 			}
 
+			config.Prune()
 			if diff := deep.Equal(config, expected); diff != nil {
 				t.Fatal(diff)
 			}
@@ -790,6 +786,7 @@ func TestLoadConfigFile_Vault_Retry(t *testing.T) {
 		},
 	}
 
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -834,6 +831,7 @@ func TestLoadConfigFile_Vault_Retry_Empty(t *testing.T) {
 		},
 	}
 
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -867,7 +865,7 @@ func TestLoadConfigFile_EnforceConsistency(t *testing.T) {
 		},
 	}
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}

command/commands.go

@@ -337,6 +337,11 @@ func initCommands(ui, serverCmdUi cli.Ui, runOpts *RunOptions) {
 				BaseCommand: getBaseCommand(),
 			}, nil
 		},
+		"operator diagnose": func() (cli.Command, error) {
+			return &OperatorDiagnoseCommand{
+				BaseCommand: getBaseCommand(),
+			}, nil
+		},
 		"operator generate-root": func() (cli.Command, error) {
 			return &OperatorGenerateRootCommand{
 				BaseCommand: getBaseCommand(),

command/server/config.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/hashicorp/hcl/hcl/token"
 	"io"
 	"io/ioutil"
 	"os"
@@ -22,6 +23,7 @@ import (
 
 // Config is the configuration for the vault server.
 type Config struct {
+	UnusedKeys map[string][]token.Pos `hcl:",unusedKeyPositions"`
 	entConfig
 
 	*configutil.SharedConfig `hcl:"-"`
@@ -41,33 +43,33 @@ type Config struct {
 	EnableUIRaw interface{} `hcl:"ui"`
 
 	MaxLeaseTTL        time.Duration `hcl:"-"`
-	MaxLeaseTTLRaw     interface{}   `hcl:"max_lease_ttl"`
+	MaxLeaseTTLRaw     interface{}   `hcl:"max_lease_ttl,alias:MaxLeaseTTL"`
 	DefaultLeaseTTL    time.Duration `hcl:"-"`
-	DefaultLeaseTTLRaw interface{}   `hcl:"default_lease_ttl"`
+	DefaultLeaseTTLRaw interface{}   `hcl:"default_lease_ttl,alias:DefaultLeaseTTL"`
 
 	ClusterCipherSuites string `hcl:"cluster_cipher_suites"`
 
 	PluginDirectory string `hcl:"plugin_directory"`
 
 	EnableRawEndpoint    bool        `hcl:"-"`
-	EnableRawEndpointRaw interface{} `hcl:"raw_storage_endpoint"`
+	EnableRawEndpointRaw interface{} `hcl:"raw_storage_endpoint,alias:EnableRawEndpoint"`
 
 	APIAddr              string      `hcl:"api_addr"`
 	ClusterAddr          string      `hcl:"cluster_addr"`
 	DisableClustering    bool        `hcl:"-"`
-	DisableClusteringRaw interface{} `hcl:"disable_clustering"`
+	DisableClusteringRaw interface{} `hcl:"disable_clustering,alias:DisableClustering"`
 
 	DisablePerformanceStandby    bool        `hcl:"-"`
-	DisablePerformanceStandbyRaw interface{} `hcl:"disable_performance_standby"`
+	DisablePerformanceStandbyRaw interface{} `hcl:"disable_performance_standby,alias:DisablePerformanceStandby"`
 
 	DisableSealWrap    bool        `hcl:"-"`
-	DisableSealWrapRaw interface{} `hcl:"disable_sealwrap"`
+	DisableSealWrapRaw interface{} `hcl:"disable_sealwrap,alias:DisableSealWrap"`
 
 	DisableIndexing    bool        `hcl:"-"`
-	DisableIndexingRaw interface{} `hcl:"disable_indexing"`
+	DisableIndexingRaw interface{} `hcl:"disable_indexing,alias:DisableIndexing"`
 
 	DisableSentinelTrace    bool        `hcl:"-"`
-	DisableSentinelTraceRaw interface{} `hcl:"disable_sentinel_trace"`
+	DisableSentinelTraceRaw interface{} `hcl:"disable_sentinel_trace,alias:DisableSentinelTrace"`
 
 	EnableResponseHeaderHostname    bool        `hcl:"-"`
 	EnableResponseHeaderHostnameRaw interface{} `hcl:"enable_response_header_hostname"`
@@ -76,6 +78,18 @@ type Config struct {
 	EnableResponseHeaderRaftNodeIDRaw interface{} `hcl:"enable_response_header_raft_node_id"`
 }
 
+const (
+	sectionSeal = "Seal"
+)
+
+func (c *Config) Validate(sourceFilePath string) []configutil.ConfigError {
+	results := configutil.ValidateUnusedFields(c.UnusedKeys, sourceFilePath)
+	if c.Telemetry != nil {
+		results = append(results, c.Telemetry.Validate(sourceFilePath)...)
+	}
+	return results
+}
+
 // DevConfig is a Config that is used for dev mode of Vault.
 func DevConfig(storageType string) (*Config, error) {
 	hclStr := `
@@ -102,7 +116,7 @@ ui = true
 `
 
 	hclStr = fmt.Sprintf(hclStr, storageType)
-	parsed, err := ParseConfig(hclStr)
+	parsed, err := ParseConfig(hclStr, "")
 	if err != nil {
 		return nil, fmt.Errorf("error parsing dev config: %w", err)
 	}
@@ -111,6 +125,7 @@ ui = true
 
 // Storage is the underlying storage configuration for the server.
 type Storage struct {
+	UnusedKeys        []string `hcl:",unusedKeys"`
 	Type              string
 	RedirectAddr      string
 	ClusterAddr       string
@@ -330,7 +345,7 @@ func LoadConfigFile(path string) (*Config, error) {
 		return nil, err
 	}
 
-	conf, err := ParseConfig(string(d))
+	conf, err := ParseConfig(string(d), path)
 	if err != nil {
 		return nil, err
 	}
@@ -338,7 +353,7 @@ func LoadConfigFile(path string) (*Config, error) {
 	return conf, nil
 }
 
-func ParseConfig(d string) (*Config, error) {
+func ParseConfig(d, source string) (*Config, error) {
 	// Parse!
 	obj, err := hcl.Parse(d)
 	if err != nil {
@@ -476,6 +491,15 @@ func ParseConfig(d string) (*Config, error) {
 		return nil, errwrap.Wrapf("error parsing enterprise config: {{err}}", err)
 	}
 
+	// Remove all unused keys from Config that were satisfied by SharedConfig.
+	result.UnusedKeys = configutil.UnusedFieldDifference(result.UnusedKeys, sharedConfig.UnusedKeys, append(result.FoundKeys, sharedConfig.FoundKeys...))
+	// Assign file info
+	for _, v := range result.UnusedKeys {
+		for _, p := range v {
+			p.Filename = source
+		}
+	}
+
 	return result, nil
 }
 
@@ -816,3 +840,17 @@ func (c *Config) Sanitized() map[string]interface{} {
 
 	return result
 }
+
+func (c *Config) Prune() {
+	for _, l := range c.Listeners {
+		l.RawConfig = nil
+	}
+	c.FoundKeys = nil
+	c.UnusedKeys = nil
+	c.SharedConfig.FoundKeys = nil
+	c.SharedConfig.UnusedKeys = nil
+	if c.Telemetry != nil {
+		c.Telemetry.FoundKeys = nil
+		c.Telemetry.UnusedKeys = nil
+	}
+}

command/server/config_test.go

@@ -57,3 +57,7 @@ func TestConfigRaftRetryJoin(t *testing.T) {
 func TestParseSeals(t *testing.T) {
 	testParseSeals(t)
 }
+
+func TestUnknownFieldValidation(t *testing.T) {
+	testUnknownFieldValidation(t)
+}

command/server/config_test_helpers.go

@@ -2,6 +2,7 @@ package server
 
 import (
 	"fmt"
+	"reflect"
 	"strings"
 	"testing"
 	"time"
@@ -11,6 +12,7 @@ import (
 	"github.com/go-test/deep"
 	"github.com/hashicorp/hcl"
 	"github.com/hashicorp/hcl/hcl/ast"
+	"github.com/hashicorp/hcl/hcl/token"
 	"github.com/hashicorp/vault/internalshared/configutil"
 )
 
@@ -40,7 +42,7 @@ func testConfigRaftRetryJoin(t *testing.T) {
 			},
 		},
 	}
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -150,7 +152,7 @@ func testLoadConfigFile_topLevel(t *testing.T, entropy *configutil.Entropy) {
 	if entropy != nil {
 		expected.Entropy = entropy
 	}
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -239,8 +241,8 @@ func testLoadConfigFile_json2(t *testing.T, entropy *configutil.Entropy) {
 	if entropy != nil {
 		expected.Entropy = entropy
 	}
-	config.Listeners[0].RawConfig = nil
-	config.Listeners[1].RawConfig = nil
+
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -257,7 +259,7 @@ func testParseEntropy(t *testing.T, oss bool) {
 				mode = "augmentation"
 				}`,
 			outErr:     nil,
-			outEntropy: configutil.Entropy{configutil.EntropyAugmentation},
+			outEntropy: configutil.Entropy{Mode: configutil.EntropyAugmentation},
 		},
 		{
 			inConfig: `entropy "seal" {
@@ -355,7 +357,7 @@ func testLoadConfigFileIntegerAndBooleanValuesCommon(t *testing.T, path string)
 		EnableUIRaw:     true,
 	}
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -450,12 +452,57 @@ func testLoadConfigFile(t *testing.T) {
 
 	addExpectedEntConfig(expected, []string{})
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
 }
 
+func testUnknownFieldValidation(t *testing.T) {
+	config, err := LoadConfigFile("./test-fixtures/config.hcl")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	expected := []configutil.ConfigError{
+		{
+			Problem: "unknown field bad_value found in configuration",
+			Position: token.Pos{
+				Filename: "./test-fixtures/config.hcl",
+				Offset:   603,
+				Line:     35,
+				Column:   5,
+			},
+		},
+	}
+	errors := config.Validate("./test-fixtures/config.hcl")
+
+	for _, er1 := range errors {
+		found := false
+		for _, ex := range expected {
+			// Only test the string, pos may change
+			if ex.Problem == er1.Problem && reflect.DeepEqual(ex.Position, er1.Position) {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Fatalf("found unexpected error: %v", er1.String())
+		}
+	}
+	for _, ex := range expected {
+		found := false
+		for _, er1 := range errors {
+			if ex.Problem == er1.Problem && reflect.DeepEqual(ex.Position, er1.Position) {
+				found = true
+			}
+		}
+		if !found {
+			t.Fatalf("could not find expected error: %v", ex.String())
+		}
+	}
+}
+
 func testLoadConfigFile_json(t *testing.T) {
 	config, err := LoadConfigFile("./test-fixtures/config.hcl.json")
 	if err != nil {
@@ -533,7 +580,7 @@ func testLoadConfigFile_json(t *testing.T) {
 
 	addExpectedEntConfig(expected, []string{})
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -597,7 +644,7 @@ func testLoadConfigDir(t *testing.T) {
 
 	addExpectedEntConfig(expected, []string{"http"})
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -699,7 +746,7 @@ func testConfig_Sanitized(t *testing.T) {
 
 	addExpectedEntSanitizedConfig(expected, []string{"http"})
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(sanitizedConfig, expected); len(diff) > 0 {
 		t.Fatalf("bad, diff: %#v", diff)
 	}
@@ -765,7 +812,7 @@ listener "tcp" {
 			},
 		},
 	}
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, *expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -825,6 +872,7 @@ func testParseSeals(t *testing.T) {
 			},
 		},
 	}
+	config.Prune()
 	require.Equal(t, config, expected)
 }
 
@@ -912,7 +960,7 @@ func testLoadConfigFileLeaseMetrics(t *testing.T) {
 
 	addExpectedEntConfig(expected, []string{})
 
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}
@@ -945,7 +993,7 @@ func testConfigRaftAutopilot(t *testing.T) {
 			},
 		},
 	}
-	config.Listeners[0].RawConfig = nil
+	config.Prune()
 	if diff := deep.Equal(config, expected); diff != nil {
 		t.Fatal(diff)
 	}

command/server/test-fixtures/config.hcl

@@ -32,6 +32,7 @@ telemetry {
     dogstatsd_addr = "127.0.0.1:7254"
     dogstatsd_tags = ["tag_1:val_1", "tag_2:val_2"]
     metrics_prefix = "myprefix"
+    bad_value = "shouldn't be here"
 }
 
 sentinel {

go.mod

@@ -73,7 +73,7 @@ require (
 	github.com/hashicorp/go-syslog v1.0.0
 	github.com/hashicorp/go-uuid v1.0.2
 	github.com/hashicorp/golang-lru v0.5.4
-	github.com/hashicorp/hcl v1.0.1-vault
+	github.com/hashicorp/hcl v1.0.1-vault-2
 	github.com/hashicorp/nomad/api v0.0.0-20191220223628-edc62acd919d
 	github.com/hashicorp/raft v1.3.0
 	github.com/hashicorp/raft-autopilot v0.1.3

go.sum

@@ -486,7 +486,6 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.4 h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@@ -644,8 +643,8 @@ github.com/hashicorp/golang-lru v0.5.3/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uG
 github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
 github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
-github.com/hashicorp/hcl v1.0.1-vault h1:UiJeEzCWAYdVaJr8Xo4lBkTozlW1+1yxVUnpbS1xVEk=
-github.com/hashicorp/hcl v1.0.1-vault/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
+github.com/hashicorp/hcl v1.0.1-vault-2 h1:j0lTHGBdaU13Pc3GaTCdWjmsT22X98bsHnA+ShzIOtg=
+github.com/hashicorp/hcl v1.0.1-vault-2/go.mod h1:XYhtn6ijBSAj6n4YqAaf7RBPS4I06AItNorpy+MoQNM=
 github.com/hashicorp/logutils v1.0.0 h1:dLEQVugN8vlakKOUE3ihGLTZJRB4j+M2cdTm/ORI65Y=
 github.com/hashicorp/logutils v1.0.0/go.mod h1:QIAnNjmIWmVIIkWDTG1z5v++HQmx9WQRO+LraFDTW64=
 github.com/hashicorp/mdns v1.0.0/go.mod h1:tL+uN++7HEJ6SQLQ2/p+z2pH24WQKWjBPkE0mNTz8vQ=
@@ -1156,7 +1155,6 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
-github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
@@ -1228,6 +1226,7 @@ go.opentelemetry.io/otel v0.20.0 h1:eaP0Fqu7SXHwvjiqDq83zImeehOHX8doTvU9AwXON8g=
 go.opentelemetry.io/otel v0.20.0/go.mod h1:Y3ugLH2oa81t5QO+Lty+zXf8zC9L26ax4Nzoxm/dooo=
 go.opentelemetry.io/otel/metric v0.20.0 h1:4kzhXFP+btKm4jwxpjIqjs41A7MakRFUS86bqLHTIw8=
 go.opentelemetry.io/otel/metric v0.20.0/go.mod h1:598I5tYlH1vzBjn+BTuhzTCSb/9debfNp6R3s7Pr1eU=
+go.opentelemetry.io/otel/oteltest v0.20.0 h1:HiITxCawalo5vQzdHfKeZurV8x7ljcqAgiWzF6Vaeaw=
 go.opentelemetry.io/otel/oteltest v0.20.0/go.mod h1:L7bgKf9ZB7qCwT9Up7i9/pn0PWIa9FqQ2IQ8LoxiGnw=
 go.opentelemetry.io/otel/sdk v0.20.0 h1:JsxtGXd06J8jrnya7fdI/U/MR6yXA5DtbZy+qoHQlr8=
 go.opentelemetry.io/otel/sdk v0.20.0/go.mod h1:g/IcepuwNsoiX5Byy2nNV0ySUF1em498m7hBWC279Yc=

internalshared/configutil/config.go

@@ -2,6 +2,7 @@ package configutil
 
 import (
 	"fmt"
+	"github.com/hashicorp/hcl/hcl/token"
 	"io/ioutil"
 	"time"
 
@@ -13,6 +14,10 @@ import (
 
 // SharedConfig contains some shared values
 type SharedConfig struct {
+	FoundKeys  []string     `hcl:",decodedFields"`
+	UnusedKeys UnusedKeyMap `hcl:",unusedKeyPositions"`
+	Sections   map[string][]token.Pos
+
 	EntSharedConfig
 
 	Listeners []*Listener `hcl:"-"`
@@ -67,6 +72,7 @@ func ParseConfig(d string) (*SharedConfig, error) {
 
 	// Start building the result
 	var result SharedConfig
+
 	if err := hcl.DecodeObject(&result, obj); err != nil {
 		return nil, err
 	}
@@ -75,6 +81,7 @@ func ParseConfig(d string) (*SharedConfig, error) {
 		if result.DefaultMaxRequestDuration, err = parseutil.ParseDurationSecond(result.DefaultMaxRequestDurationRaw); err != nil {
 			return nil, err
 		}
+		result.FoundKeys = append(result.FoundKeys, "DefaultMaxRequestDuration")
 		result.DefaultMaxRequestDurationRaw = nil
 	}
 
@@ -82,6 +89,7 @@ func ParseConfig(d string) (*SharedConfig, error) {
 		if result.DisableMlock, err = parseutil.ParseBool(result.DisableMlockRaw); err != nil {
 			return nil, err
 		}
+		result.FoundKeys = append(result.FoundKeys, "DisableMlock")
 		result.DisableMlockRaw = nil
 	}
 

internalshared/configutil/config_util.go

@@ -3,11 +3,30 @@
 package configutil
 
 import (
+	"fmt"
+	"github.com/asaskevich/govalidator"
 	"github.com/hashicorp/hcl/hcl/ast"
+	"github.com/hashicorp/hcl/hcl/token"
+	"github.com/hashicorp/vault/sdk/helper/strutil"
 )
 
 type EntSharedConfig struct{}
 
+type UnusedKeyMap map[string][]token.Pos
+
+type ConfigError struct {
+	Problem  string
+	Position token.Pos
+}
+
+func (c *ConfigError) String() string {
+	return fmt.Sprintf("%s at %s", c.Problem, c.Position.String())
+}
+
+type ValidatableConfig interface {
+	Validate() []ConfigError
+}
+
 func (ec *EntSharedConfig) ParseConfig(list *ast.ObjectList) error {
 	return nil
 }
@@ -15,3 +34,41 @@ func (ec *EntSharedConfig) ParseConfig(list *ast.ObjectList) error {
 func ParseEntropy(result *SharedConfig, list *ast.ObjectList, blockName string) error {
 	return nil
 }
+
+// Creates the ConfigErrors for unused fields, which occur in various structs
+func ValidateUnusedFields(unusedKeyPositions UnusedKeyMap, sourceFilePath string) []ConfigError {
+	if unusedKeyPositions == nil {
+		return nil
+	}
+	var errors []ConfigError
+	for field, positions := range unusedKeyPositions {
+		problem := fmt.Sprintf("unknown field %s found in configuration", field)
+		for _, pos := range positions {
+			if pos.Filename == "" && sourceFilePath != "" {
+				pos.Filename = sourceFilePath
+			}
+			errors = append(errors, ConfigError{
+				Problem:  problem,
+				Position: pos,
+			})
+		}
+	}
+	return errors
+}
+
+// UnusedFieldDifference returns all the keys in map a that are not present in map b, and also not present in foundKeys.
+func UnusedFieldDifference(a, b UnusedKeyMap, foundKeys []string) UnusedKeyMap {
+	if a == nil {
+		return nil
+	}
+	if b == nil {
+		return a
+	}
+	res := make(UnusedKeyMap)
+	for k, v := range a {
+		if _, ok := b[k]; !ok && !strutil.StrListContainsCaseInsensitive(foundKeys, govalidator.UnderscoreToCamelCase(k)) {
+			res[k] = v
+		}
+	}
+	return res
+}

internalshared/configutil/kms.go

@@ -42,6 +42,7 @@ type Entropy struct {
 
 // KMS contains KMS configuration for the server
 type KMS struct {
+	UnusedKeys []string `hcl:",unusedKeys"`
 	Type       string
 	// Purpose can be used to allow a string-based specification of what this
 	// KMS is designated for, in situations where we want to allow more than

internalshared/configutil/listener.go

@@ -28,6 +28,7 @@ type ListenerProfiling struct {
 
 // Listener is the listener configuration for the server.
 type Listener struct {
+	UnusedKeys []string `hcl:",unusedKeys"`
 	RawConfig  map[string]interface{}
 
 	Type       string

internalshared/configutil/telemetry.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"github.com/hashicorp/vault/sdk/helper/parseutil"
 	"time"
 
 	monitoring "cloud.google.com/go/monitoring/apiv3"
@@ -18,7 +19,6 @@ import (
 	"github.com/hashicorp/hcl"
 	"github.com/hashicorp/hcl/hcl/ast"
 	"github.com/hashicorp/vault/helper/metricsutil"
-	"github.com/hashicorp/vault/sdk/helper/parseutil"
 	"github.com/mitchellh/cli"
 	"google.golang.org/api/option"
 )
@@ -33,6 +33,8 @@ const (
 
 // Telemetry is the telemetry configuration for the server
 type Telemetry struct {
+	FoundKeys    []string     `hcl:",decodedFields"`
+	UnusedKeys   UnusedKeyMap `hcl:",unusedKeyPositions"`
 	StatsiteAddr string       `hcl:"statsite_address"`
 	StatsdAddr   string       `hcl:"statsd_address"`
 
@@ -151,6 +153,10 @@ type Telemetry struct {
 	LeaseMetricsNameSpaceLabels bool `hcl:"add_lease_metrics_namespace_labels"`
 }
 
+func (t *Telemetry) Validate(source string) []ConfigError {
+	return ValidateUnusedFields(t.UnusedKeys, source)
+}
+
 func (t *Telemetry) GoString() string {
 	return fmt.Sprintf("*%#v", *t)
 }

sdk/helper/strutil/strutil.go

@@ -32,6 +32,16 @@ func StrListContains(haystack []string, needle string) bool {
 	return false
 }
 
+// StrListContainsCaseInsensitive looks for a string in a list of strings.
+func StrListContainsCaseInsensitive(haystack []string, needle string) bool {
+	for _, item := range haystack {
+		if strings.EqualFold(item, needle) {
+			return true
+		}
+	}
+	return false
+}
+
 // StrListSubset checks if a given list is a subset
 // of another set
 func StrListSubset(super, sub []string) bool {

vendor/github.com/hashicorp/hcl/decoder.go

@@ -505,7 +505,7 @@ func expandObject(node ast.Node, result reflect.Value) ast.Node {
 	// we need to un-flatten the ast enough to decode
 	newNode := &ast.ObjectItem{
 		Keys: []*ast.ObjectKey{
-			&ast.ObjectKey{
+			{
 				Token: keyToken,
 			},
 		},
@@ -628,6 +628,18 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 	decodedFields := make([]string, 0, len(fields))
 	decodedFieldsVal := make([]reflect.Value, 0)
 	unusedKeysVal := make([]reflect.Value, 0)
+
+	// fill unusedNodeKeys with keys from the AST
+	// a slice because we have to do equals case fold to match Filter
+	unusedNodeKeys := make(map[string][]token.Pos, 0)
+	for _, item := range list.Items {
+		for _, k := range item.Keys {
+			fn := k.Token.Value().(string)
+			sl := unusedNodeKeys[fn]
+			unusedNodeKeys[fn]  = append(sl, k.Token.Pos)
+		}
+	}
+
 	for _, f := range fields {
 		field, fieldValue := f.field, f.val
 		if !fieldValue.IsValid() {
@@ -661,7 +673,7 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 
 				fieldValue.SetString(item.Keys[0].Token.Value().(string))
 				continue
-			case "unusedKeys":
+			case "unusedKeyPositions":
 				unusedKeysVal = append(unusedKeysVal, fieldValue)
 				continue
 			}
@@ -682,8 +694,9 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 			continue
 		}
 
-		// Track the used key
+		// Track the used keys
 		usedKeys[fieldName] = struct{}{}
+		unusedNodeKeys = removeCaseFold(unusedNodeKeys, fieldName)
 
 		// Create the field name and decode. We range over the elements
 		// because we actually want the value.
@@ -716,6 +729,13 @@ func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value)
 		}
 	}
 
+	if len(unusedNodeKeys) > 0 {
+		// like decodedFields, populated the unusedKeys field(s)
+		for _, v := range unusedKeysVal {
+			v.Set(reflect.ValueOf(unusedNodeKeys))
+		}
+	}
+
 	return nil
 }
 
@@ -727,3 +747,17 @@ func findNodeType() reflect.Type {
 	value := reflect.ValueOf(nodeContainer).FieldByName("Node")
 	return value.Type()
 }
+
+func removeCaseFold(xs map[string][]token.Pos, y string) map[string][]token.Pos {
+	var toDel []string
+
+	for i := range xs {
+		if strings.EqualFold(i, y) {
+			toDel = append(toDel, i)
+		}
+	}
+	for _, i := range toDel {
+		delete(xs, i)
+	}
+	return xs
+}

vendor/github.com/hashicorp/hcl/go.mod

@@ -1,3 +1,5 @@
 module github.com/hashicorp/hcl
 
+go 1.15
+
 require github.com/davecgh/go-spew v1.1.1

vendor/github.com/hashicorp/vault/sdk/helper/strutil/strutil.go

@@ -32,6 +32,16 @@ func StrListContains(haystack []string, needle string) bool {
 	return false
 }
 
+// StrListContainsCaseInsensitive looks for a string in a list of strings.
+func StrListContainsCaseInsensitive(haystack []string, needle string) bool {
+	for _, item := range haystack {
+		if strings.EqualFold(item, needle) {
+			return true
+		}
+	}
+	return false
+}
+
 // StrListSubset checks if a given list is a subset
 // of another set
 func StrListSubset(super, sub []string) bool {

vendor/modules.txt

@@ -589,7 +589,7 @@ github.com/hashicorp/go-version
 ## explicit
 github.com/hashicorp/golang-lru
 github.com/hashicorp/golang-lru/simplelru
-# github.com/hashicorp/hcl v1.0.1-vault
+# github.com/hashicorp/hcl v1.0.1-vault-2
 ## explicit
 github.com/hashicorp/hcl
 github.com/hashicorp/hcl/hcl/ast