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processorhandler.go
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processorhandler.go
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package opaprocessor
import (
"context"
"fmt"
"time"
"github.com/armosec/armoapi-go/armotypes"
logger "github.com/kubescape/go-logger"
"github.com/kubescape/go-logger/helpers"
"github.com/kubescape/kubescape/v2/core/cautils"
"github.com/kubescape/kubescape/v2/core/pkg/score"
"github.com/kubescape/opa-utils/objectsenvelopes"
"github.com/kubescape/opa-utils/reporthandling"
"github.com/kubescape/opa-utils/reporthandling/apis"
"github.com/kubescape/opa-utils/reporthandling/results/v1/resourcesresults"
"github.com/open-policy-agent/opa/storage"
"github.com/kubescape/k8s-interface/workloadinterface"
reporthandlingv2 "github.com/kubescape/opa-utils/reporthandling/v2"
"github.com/kubescape/opa-utils/resources"
"github.com/open-policy-agent/opa/ast"
"github.com/open-policy-agent/opa/rego"
)
const ScoreConfigPath = "/resources/config"
type OPAProcessor struct {
regoDependenciesData *resources.RegoDependenciesData
*cautils.OPASessionObj
}
func NewOPAProcessor(sessionObj *cautils.OPASessionObj, regoDependenciesData *resources.RegoDependenciesData) *OPAProcessor {
if regoDependenciesData != nil && sessionObj != nil {
regoDependenciesData.PostureControlInputs = sessionObj.RegoInputData.PostureControlInputs
regoDependenciesData.DataControlInputs = sessionObj.RegoInputData.DataControlInputs
}
return &OPAProcessor{
OPASessionObj: sessionObj,
regoDependenciesData: regoDependenciesData,
}
}
func (opap *OPAProcessor) ProcessRulesListenner() error {
opap.OPASessionObj.AllPolicies = ConvertFrameworksToPolicies(opap.Policies, cautils.BuildNumber)
ConvertFrameworksToSummaryDetails(&opap.Report.SummaryDetails, opap.Policies, opap.OPASessionObj.AllPolicies)
// process
if err := opap.Process(opap.OPASessionObj.AllPolicies); err != nil {
logger.L().Error(err.Error())
// Return error?
}
// edit results
opap.updateResults()
//TODO: review this location
scorewrapper := score.NewScoreWrapper(opap.OPASessionObj)
scorewrapper.Calculate(score.EPostureReportV2)
return nil
}
func (opap *OPAProcessor) Process(policies *cautils.Policies) error {
opap.loggerStartScanning()
cautils.StartSpinner()
var errs error
for _, control := range policies.Controls {
resourcesAssociatedControl, err := opap.processControl(&control)
if err != nil {
logger.L().Error(err.Error())
}
// update resources with latest results
if len(resourcesAssociatedControl) != 0 {
for resourceID, controlResult := range resourcesAssociatedControl {
if _, ok := opap.ResourcesResult[resourceID]; !ok {
opap.ResourcesResult[resourceID] = resourcesresults.Result{ResourceID: resourceID}
}
t := opap.ResourcesResult[resourceID]
t.AssociatedControls = append(t.AssociatedControls, controlResult)
opap.ResourcesResult[resourceID] = t
}
}
}
opap.Report.ReportGenerationTime = time.Now().UTC()
cautils.StopSpinner()
opap.loggerDoneScanning()
return errs
}
func (opap *OPAProcessor) loggerStartScanning() {
targetScan := opap.OPASessionObj.Metadata.ScanMetadata.ScanningTarget
if reporthandlingv2.Cluster == targetScan {
logger.L().Info("Scanning", helpers.String(targetScan.String(), cautils.ClusterName))
} else {
logger.L().Info("Scanning " + targetScan.String())
}
}
func (opap *OPAProcessor) loggerDoneScanning() {
targetScan := opap.OPASessionObj.Metadata.ScanMetadata.ScanningTarget
if reporthandlingv2.Cluster == targetScan {
logger.L().Success("Done scanning", helpers.String(targetScan.String(), cautils.ClusterName))
} else {
logger.L().Success("Done scanning " + targetScan.String())
}
}
func (opap *OPAProcessor) processControl(control *reporthandling.Control) (map[string]resourcesresults.ResourceAssociatedControl, error) {
var errs error
resourcesAssociatedControl := make(map[string]resourcesresults.ResourceAssociatedControl)
// ruleResults := make(map[string][]resourcesresults.ResourceAssociatedRule)
for i := range control.Rules {
resourceAssociatedRule, err := opap.processRule(&control.Rules[i], control.FixedInput)
if err != nil {
logger.L().Error(err.Error())
continue
}
// append failed rules to controls
if len(resourceAssociatedRule) != 0 {
for resourceID, ruleResponse := range resourceAssociatedRule {
controlResult := resourcesresults.ResourceAssociatedControl{}
controlResult.SetID(control.ControlID)
controlResult.SetName(control.Name)
if _, ok := resourcesAssociatedControl[resourceID]; ok {
controlResult.ResourceAssociatedRules = resourcesAssociatedControl[resourceID].ResourceAssociatedRules
}
if ruleResponse != nil {
controlResult.ResourceAssociatedRules = append(controlResult.ResourceAssociatedRules, *ruleResponse)
}
resourcesAssociatedControl[resourceID] = controlResult
}
}
}
return resourcesAssociatedControl, errs
}
func (opap *OPAProcessor) processRule(rule *reporthandling.PolicyRule, fixedControlInputs map[string][]string) (map[string]*resourcesresults.ResourceAssociatedRule, error) {
postureControlInputs := opap.regoDependenciesData.GetFilteredPostureControlInputs(rule.ConfigInputs) // get store
dataControlInputs := map[string]string{"cloudProvider": opap.OPASessionObj.Report.ClusterCloudProvider}
// Merge configurable control input and fixed control input
for k, v := range fixedControlInputs {
postureControlInputs[k] = v
}
RuleRegoDependenciesData := resources.RegoDependenciesData{DataControlInputs: dataControlInputs,
PostureControlInputs: postureControlInputs}
inputResources, err := reporthandling.RegoResourcesAggregator(rule, getAllSupportedObjects(opap.K8SResources, opap.ArmoResource, opap.AllResources, rule))
if err != nil {
return nil, fmt.Errorf("error getting aggregated k8sObjects: %s", err.Error())
}
if len(inputResources) == 0 {
return nil, nil // no resources found for testing
}
inputRawResources := workloadinterface.ListMetaToMap(inputResources)
resources := map[string]*resourcesresults.ResourceAssociatedRule{}
// the failed resources are a subgroup of the enumeratedData, so we store the enumeratedData like it was the input data
enumeratedData, err := opap.enumerateData(rule, inputRawResources)
if err != nil {
return nil, err
}
inputResources = objectsenvelopes.ListMapToMeta(enumeratedData)
for i := range inputResources {
resources[inputResources[i].GetID()] = &resourcesresults.ResourceAssociatedRule{
Name: rule.Name,
ControlConfigurations: postureControlInputs,
Status: apis.StatusPassed,
}
opap.AllResources[inputResources[i].GetID()] = inputResources[i]
}
ruleResponses, err := opap.runOPAOnSingleRule(rule, inputRawResources, ruleData, RuleRegoDependenciesData)
if err != nil {
// TODO - Handle error
logger.L().Error(err.Error())
} else {
// ruleResponse to ruleResult
for i := range ruleResponses {
failedResources := objectsenvelopes.ListMapToMeta(ruleResponses[i].GetFailedResources())
for j := range failedResources {
ruleResult := &resourcesresults.ResourceAssociatedRule{}
if r, k := resources[failedResources[j].GetID()]; k {
ruleResult = r
}
ruleResult.Status = apis.StatusFailed
for j := range ruleResponses[i].FailedPaths {
ruleResult.Paths = append(ruleResult.Paths, armotypes.PosturePaths{FailedPath: ruleResponses[i].FailedPaths[j]})
}
for j := range ruleResponses[i].FixPaths {
ruleResult.Paths = append(ruleResult.Paths, armotypes.PosturePaths{FixPath: ruleResponses[i].FixPaths[j]})
}
if ruleResponses[i].FixCommand != "" {
ruleResult.Paths = append(ruleResult.Paths, armotypes.PosturePaths{FixCommand: ruleResponses[i].FixCommand})
}
resources[failedResources[j].GetID()] = ruleResult
}
}
}
return resources, err
}
func (opap *OPAProcessor) runOPAOnSingleRule(rule *reporthandling.PolicyRule, k8sObjects []map[string]interface{}, getRuleData func(*reporthandling.PolicyRule) string, ruleRegoDependenciesData resources.RegoDependenciesData) ([]reporthandling.RuleResponse, error) {
switch rule.RuleLanguage {
case reporthandling.RegoLanguage, reporthandling.RegoLanguage2:
return opap.runRegoOnK8s(rule, k8sObjects, getRuleData, ruleRegoDependenciesData)
default:
return nil, fmt.Errorf("rule: '%s', language '%v' not supported", rule.Name, rule.RuleLanguage)
}
}
func (opap *OPAProcessor) runRegoOnK8s(rule *reporthandling.PolicyRule, k8sObjects []map[string]interface{}, getRuleData func(*reporthandling.PolicyRule) string, ruleRegoDependenciesData resources.RegoDependenciesData) ([]reporthandling.RuleResponse, error) {
// compile modules
modules, err := getRuleDependencies()
if err != nil {
return nil, fmt.Errorf("rule: '%s', %s", rule.Name, err.Error())
}
modules[rule.Name] = getRuleData(rule)
compiled, err := ast.CompileModules(modules)
if err != nil {
return nil, fmt.Errorf("in 'runRegoOnSingleRule', failed to compile rule, name: %s, reason: %s", rule.Name, err.Error())
}
store, err := ruleRegoDependenciesData.TOStorage()
if err != nil {
return nil, err
}
// Eval
results, err := opap.regoEval(k8sObjects, compiled, &store)
if err != nil {
logger.L().Error(err.Error())
}
return results, nil
}
func (opap *OPAProcessor) regoEval(inputObj []map[string]interface{}, compiledRego *ast.Compiler, store *storage.Store) ([]reporthandling.RuleResponse, error) {
// opap.regoDependenciesData.PostureControlInputs
rego := rego.New(
rego.Query("data.armo_builtins"), // get package name from rule
rego.Compiler(compiledRego),
rego.Input(inputObj),
rego.Store(*store),
)
// Run evaluation
resultSet, err := rego.Eval(context.Background())
if err != nil {
return nil, err
}
results, err := reporthandling.ParseRegoResult(&resultSet)
if err != nil {
return results, err
}
return results, nil
}
func (opap *OPAProcessor) enumerateData(rule *reporthandling.PolicyRule, k8sObjects []map[string]interface{}) ([]map[string]interface{}, error) {
if ruleEnumeratorData(rule) == "" {
return k8sObjects, nil
}
postureControlInputs := opap.regoDependenciesData.GetFilteredPostureControlInputs(rule.ConfigInputs)
dataControlInputs := map[string]string{"cloudProvider": opap.OPASessionObj.Report.ClusterCloudProvider}
RuleRegoDependenciesData := resources.RegoDependenciesData{DataControlInputs: dataControlInputs,
PostureControlInputs: postureControlInputs}
ruleResponse, err := opap.runOPAOnSingleRule(rule, k8sObjects, ruleEnumeratorData, RuleRegoDependenciesData)
if err != nil {
return nil, err
}
failedResources := []map[string]interface{}{}
for _, ruleResponse := range ruleResponse {
failedResources = append(failedResources, ruleResponse.GetFailedResources()...)
}
return failedResources, nil
}