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namespace_method_checker.go
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/
namespace_method_checker.go
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package authorization
import (
"fmt"
"reflect"
"regexp"
"strings"
"github.com/kiali/kiali/kubernetes"
"github.com/kiali/kiali/models"
"github.com/kiali/kiali/util/httputil"
)
var methodMatcher = regexp.MustCompile(`^((\/[a-zA-Z\.]+)+)(\/[a-zA-Z]+)$`)
type NamespaceMethodChecker struct {
AuthorizationPolicy kubernetes.IstioObject
Namespaces models.NamespaceNames
}
func (ap NamespaceMethodChecker) Check() ([]*models.IstioCheck, bool) {
checks, valid := make([]*models.IstioCheck, 0), true
// Getting rules array. If not present, quitting validation.
rulesStct, ok := ap.AuthorizationPolicy.GetSpec()["rules"]
if !ok {
return checks, valid
}
// Getting slice of Rules. Quitting if not an slice.
rules := reflect.ValueOf(rulesStct)
if rules.Kind() != reflect.Slice {
return checks, valid
}
for ruleIdx := 0; ruleIdx < rules.Len(); ruleIdx++ {
rule, ok := rules.Index(ruleIdx).Interface().(map[string]interface{})
if !ok || rule == nil {
continue
}
if rule["from"] != nil {
toChecks, toValid := ap.validateFromField(ruleIdx, rule["from"])
checks = append(checks, toChecks...)
valid = valid && toValid
}
if rule["to"] != nil {
fromChecks, fromValid := ap.validateToField(ruleIdx, rule["to"])
checks = append(checks, fromChecks...)
valid = valid && fromValid
}
}
return checks, valid
}
func (ap NamespaceMethodChecker) validateFromField(ruleIdx int, from interface{}) ([]*models.IstioCheck, bool) {
fromSl, ok := from.([]interface{})
if !ok {
return nil, true
}
checks, valid := make([]*models.IstioCheck, 0, len(fromSl)), true
for fromIdx, fromStc := range fromSl {
fromMap, ok := fromStc.(map[string]interface{})
if !ok {
continue
}
sourceMap, ok := fromMap["source"].(map[string]interface{})
if !ok {
continue
}
nsList, ok := sourceMap["namespaces"].([]interface{})
if !ok {
continue
}
for i, n := range nsList {
if !ap.Namespaces.Includes(n.(string)) {
valid = true
path := fmt.Sprintf("spec/rules[%d]/from[%d]/source/namespaces[%d]", ruleIdx, fromIdx, i)
validation := models.Build("authorizationpolicy.source.namespacenotfound", path)
checks = append(checks, &validation)
}
}
}
return checks, valid
}
func (ap NamespaceMethodChecker) validateToField(ruleIdx int, to interface{}) ([]*models.IstioCheck, bool) {
toSl, ok := to.([]interface{})
if !ok {
return nil, true
}
checks, valid := make([]*models.IstioCheck, 0, len(toSl)), true
for toIdx, toStc := range toSl {
toMap, ok := toStc.(map[string]interface{})
if !ok {
continue
}
sourceMap, ok := toMap["operation"].(map[string]interface{})
if !ok {
continue
}
mthdList, ok := sourceMap["methods"].([]interface{})
if !ok {
continue
}
for i, m := range mthdList {
if !validMethod(m.(string)) {
valid = true
path := fmt.Sprintf("spec/rules[%d]/to[%d]/operation/methods[%d]", ruleIdx, toIdx, i)
validation := models.Build("authorizationpolicy.to.wrongmethod", path)
checks = append(checks, &validation)
}
}
}
return checks, valid
}
func validMethod(m string) bool {
valid := false
for _, httpMethod := range httputil.HttpMethods() {
// HTTP methods allowed or
// For gRPC service, a fully-qualified name like “/package.service/method”
valid = valid || (strings.TrimSpace(strings.ToUpper(m)) == httpMethod || methodMatcher.MatchString(m))
}
return valid
}