/
runtime.go
127 lines (103 loc) · 2.48 KB
/
runtime.go
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// Copyright 2018 The OPA Authors. All rights reserved.
// Use of this source code is governed by an Apache2
// license that can be found in the LICENSE file.
package topdown
import (
"fmt"
"github.com/open-policy-agent/opa/ast"
)
func builtinOPARuntime(bctx BuiltinContext, _ []*ast.Term, iter func(*ast.Term) error) error {
if bctx.Runtime == nil {
return iter(ast.ObjectTerm())
}
if bctx.Runtime.Get(ast.StringTerm("config")) != nil {
iface, err := ast.ValueToInterface(bctx.Runtime.Value, illegalResolver{})
if err != nil {
return err
}
if object, ok := iface.(map[string]interface{}); ok {
if cfgRaw, ok := object["config"]; ok {
if config, ok := cfgRaw.(map[string]interface{}); ok {
configPurged, err := activeConfig(config)
if err != nil {
return err
}
object["config"] = configPurged
value, err := ast.InterfaceToValue(object)
if err != nil {
return err
}
return iter(ast.NewTerm(value))
}
}
}
}
return iter(bctx.Runtime)
}
func init() {
RegisterBuiltinFunc(ast.OPARuntime.Name, builtinOPARuntime)
}
func activeConfig(config map[string]interface{}) (interface{}, error) {
if config["services"] != nil {
err := removeServiceCredentials(config["services"])
if err != nil {
return nil, err
}
}
if config["keys"] != nil {
err := removeCryptoKeys(config["keys"])
if err != nil {
return nil, err
}
}
return config, nil
}
func removeServiceCredentials(x interface{}) error {
switch x := x.(type) {
case []interface{}:
for _, v := range x {
err := removeKey(v, "credentials")
if err != nil {
return err
}
}
case map[string]interface{}:
for _, v := range x {
err := removeKey(v, "credentials")
if err != nil {
return err
}
}
default:
return fmt.Errorf("illegal service config type: %T", x)
}
return nil
}
func removeCryptoKeys(x interface{}) error {
switch x := x.(type) {
case map[string]interface{}:
for _, v := range x {
err := removeKey(v, "key", "private_key")
if err != nil {
return err
}
}
default:
return fmt.Errorf("illegal keys config type: %T", x)
}
return nil
}
func removeKey(x interface{}, keys ...string) error {
val, ok := x.(map[string]interface{})
if !ok {
return fmt.Errorf("type assertion error")
}
for _, key := range keys {
delete(val, key)
}
return nil
}
type illegalResolver struct{}
func (illegalResolver) Resolve(ref ast.Ref) (interface{}, error) {
return nil, fmt.Errorf("illegal value: %v", ref)
}