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juliaElastic authored Nov 13, 2023
2 parents bf6c9e3 + a465d09 commit 2cc1e7d
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Showing 4 changed files with 122 additions and 54 deletions.
1 change: 1 addition & 0 deletions .buildkite/pipeline.yml
Original file line number Diff line number Diff line change
Expand Up @@ -81,6 +81,7 @@ steps:
image: "docker.elastic.co/cloud-ci/sonarqube/buildkite-scanner:latest"
command:
- "buildkite-agent artifact download build/*coverage.out ."
- "buildkite-agent artifact download build/test-unit.out.xml ."
- "/scan-source-code.sh"
depends_on:
- step: "unit-test"
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Original file line number Diff line number Diff line change
@@ -0,0 +1,32 @@
# Kind can be one of:
# - breaking-change: a change to previously-documented behavior
# - deprecation: functionality that is being removed in a later release
# - bug-fix: fixes a problem in a previous version
# - enhancement: extends functionality but does not break or fix existing behavior
# - feature: new functionality
# - known-issue: problems that we are aware of in a given version
# - security: impacts on the security of a product or a user’s deployment.
# - upgrade: important information for someone upgrading from a prior version
# - other: does not fit into any of the other categories
kind: bug-fix

# Change summary; a 80ish characters long description of the change.
summary: Replace all secret references in input objects

# Long description; in case the summary is not enough to describe the change
# this field accommodate a description without length limits.
# NOTE: This field will be rendered only for breaking-change and known-issue kinds at the moment.
#description:

# Affected component; a word indicating the component this changeset affects.
component:

# PR URL; optional; the PR number that added the changeset.
# If not present is automatically filled by the tooling finding the PR where this changelog fragment has been added.
# NOTE: the tooling supports backports, so it's able to fill the original PR number instead of the backport PR number.
# Please provide it if you are adding a fragment for a different PR.
#pr: https://github.com/owner/repo/1234

# Issue URL; optional; the GitHub issue related to this changeset (either closes or is part of).
# If not present is automatically filled by the tooling with the issue linked to the PR number.
issue: 3083
73 changes: 30 additions & 43 deletions internal/pkg/policy/secret.go
Original file line number Diff line number Diff line change
Expand Up @@ -57,27 +57,41 @@ func getPolicyInputsWithSecrets(ctx context.Context, data *model.PolicyData, bul
for _, input := range data.Inputs {
newInput := make(map[string]interface{})
for k, v := range input {
// replace secret refs in input stream fields
if k == "streams" {
if streams, ok := v.([]any); ok {
newInput[k] = processStreams(streams, secretValues)
}
// replace secret refs in input fields
} else if ref, ok := input[k].(string); ok {
val := replaceSecretRef(ref, secretValues)
newInput[k] = val
}
// if any field was not processed, add back as is
if _, ok := newInput[k]; !ok {
newInput[k] = v
}
newInput[k] = replaceAnyRef(v, secretValues)
}
result = append(result, newInput)
}
data.SecretReferences = nil
return result, nil
}

// replaceAnyRef is a generic approach to replacing any secret references in the passed item.
// It will go through any slices or maps and replace any secret references.
//
// go's generic parameters are not a good fit for rewriting this method as the typeswitch will not work.
func replaceAnyRef(ref any, secrets map[string]string) any {
var r any
switch val := ref.(type) {
case string:
r = replaceStringRef(val, secrets)
case map[string]any:
obj := make(map[string]any)
for k, v := range val {
obj[k] = replaceAnyRef(v, secrets)
}
r = obj
case []any:
arr := make([]any, len(val))
for i, v := range val {
arr[i] = replaceAnyRef(v, secrets)
}
r = arr
default:
r = val
}
return r
}

type OutputSecret struct {
Path []string
ID string
Expand Down Expand Up @@ -162,35 +176,8 @@ func processOutputSecret(ctx context.Context, output smap.Map, bulker bulk.Bulk)
return nil
}

func processStreams(streams []any, secretValues map[string]string) []any {
newStreams := make([]any, 0)
for _, stream := range streams {
if streamMap, ok := stream.(map[string]interface{}); ok {
newStream := replaceSecretsInStream(streamMap, secretValues)
newStreams = append(newStreams, newStream)
} else {
newStreams = append(newStreams, stream)
}
}
return newStreams
}

// if field values are secret refs, replace with secret value, otherwise noop
func replaceSecretsInStream(streamMap map[string]interface{}, secretValues map[string]string) map[string]interface{} {
newStream := make(map[string]interface{})
for streamKey, streamVal := range streamMap {
if streamRef, ok := streamMap[streamKey].(string); ok {
replacedVal := replaceSecretRef(streamRef, secretValues)
newStream[streamKey] = replacedVal
} else {
newStream[streamKey] = streamVal
}
}
return newStream
}

// replace values mathing a secret ref regex, e.g. $co.elastic.secret{<secret ref>} -> <secret value>
func replaceSecretRef(ref string, secretValues map[string]string) string {
// replaceStringRef replaces values matching a secret ref regex, e.g. $co.elastic.secret{<secret ref>} -> <secret value>
func replaceStringRef(ref string, secretValues map[string]string) string {
matches := secretRegex.FindStringSubmatch(ref)
if len(matches) > 1 {
secretRef := matches[1]
Expand Down
70 changes: 59 additions & 11 deletions internal/pkg/policy/secret_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -15,45 +15,46 @@ import (
ftesting "github.com/elastic/fleet-server/v7/internal/pkg/testing"

"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)

func TestReplaceSecretRef(t *testing.T) {
func TestReplaceStringRef(t *testing.T) {
secretRefs := map[string]string{
"abcd": "value1",
}
val := replaceSecretRef("$co.elastic.secret{abcd}", secretRefs)
val := replaceStringRef("$co.elastic.secret{abcd}", secretRefs)
assert.Equal(t, "value1", val)
}

func TestReplaceSecretRefPartial(t *testing.T) {
func TestReplaceStringRefPartial(t *testing.T) {
secretRefs := map[string]string{
"abcd": "value1",
}
val := replaceSecretRef("partial $co.elastic.secret{abcd}", secretRefs)
val := replaceStringRef("partial $co.elastic.secret{abcd}", secretRefs)
assert.Equal(t, "partial value1", val)
}

func TestReplaceSecretRefPartial2(t *testing.T) {
func TestReplaceStringRefPartial2(t *testing.T) {
secretRefs := map[string]string{
"abcd": "http://localhost",
}
val := replaceSecretRef("$co.elastic.secret{abcd}/services", secretRefs)
val := replaceStringRef("$co.elastic.secret{abcd}/services", secretRefs)
assert.Equal(t, "http://localhost/services", val)
}

func TestReplaceSecretRefNotASecret(t *testing.T) {
func TestReplaceStringRefNotASecret(t *testing.T) {
secretRefs := map[string]string{
"abcd": "value1",
}
val := replaceSecretRef("abcd", secretRefs)
val := replaceStringRef("abcd", secretRefs)
assert.Equal(t, "abcd", val)
}

func TestReplaceSecretRefNotFound(t *testing.T) {
func TestReplaceStringRefNotFound(t *testing.T) {
secretRefs := map[string]string{
"abcd": "value1",
}
val := replaceSecretRef("$co.elastic.secret{other}", secretRefs)
val := replaceStringRef("$co.elastic.secret{other}", secretRefs)
assert.Equal(t, "$co.elastic.secret{other}", val)
}

Expand Down Expand Up @@ -107,6 +108,53 @@ func TestGetPolicyInputsWithSecretsAndStreams(t *testing.T) {
assert.Nil(t, pData.SecretReferences)
}

func TestPolicyInputSteamsEmbedded(t *testing.T) {
refs := []model.SecretReferencesItems{{ID: "ref1"}}
inputs := []map[string]interface{}{
{"id": "input1", "streams": []interface{}{
map[string]interface{}{
"id": "stream1",
"key": "val",
"embedded": map[string]interface{}{
"embedded-key": "embedded-val",
"embedded-arr": []interface{}{
map[string]interface{}{
"embedded-secret": "$co.elastic.secret{ref1}",
},
}},
},
}},
}

pData := model.PolicyData{
SecretReferences: refs,
Inputs: inputs,
}
bulker := ftesting.NewMockBulk()
expected := []map[string]interface{}{{
"id": "input1",
"streams": []interface{}{
map[string]interface{}{
"id": "stream1",
"key": "val",
"embedded": map[string]interface{}{
"embedded-key": "embedded-val",
"embedded-arr": []interface{}{
map[string]interface{}{
"embedded-secret": "ref1_value",
},
}},
},
}},
}

result, err := getPolicyInputsWithSecrets(context.TODO(), &pData, bulker)
require.NoError(t, err)

assert.Equal(t, expected, result)

}

func TestGetPolicyInputsNoopWhenNoSecrets(t *testing.T) {
inputs := []map[string]interface{}{
{"id": "input1"},
Expand Down Expand Up @@ -148,7 +196,7 @@ func TestProcessOutputSecret(t *testing.T) {
name: "Output with secrets",
outputJSON: `{
"secrets": {
"password": {"id": "passwordid"}
"password": {"id": "passwordid"}
}
}`,
expectOutputJSON: `{
Expand Down

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