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Fix some leaks in opa policies #1624

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merged 2 commits into from
May 15, 2024
Merged

Fix some leaks in opa policies #1624

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1575d4d
Fix some leaks in opa policies
NikitaSkrynnik May 14, 2024
5d3cb61
fix go linter issues
NikitaSkrynnik May 15, 2024
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52 changes: 20 additions & 32 deletions pkg/tools/opa/policy.go
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
// Copyright (c) 2020-2022 Doc.ai and/or its affiliates.
//
// Copyright (c) 2023 Cisco and/or its affiliates.
// Copyright (c) 2023-2024 Cisco and/or its affiliates.
//
// SPDX-License-Identifier: Apache-2.0
//
Expand All @@ -20,10 +20,10 @@ package opa

import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
"sync"

"github.com/open-policy-agent/opa/rego"
"github.com/pkg/errors"
Expand Down Expand Up @@ -77,15 +77,12 @@ func WithNamedPolicyFromSource(name, source, query string, checkQuery CheckQuery

// AuthorizationPolicy checks that passed tokens are valid
type AuthorizationPolicy struct {
initErr error
name string
policyFilePath string
policySource string
pkg string
query string
evalQuery *rego.PreparedEvalQuery
checker CheckAccessFunc
once sync.Once
}

// Name returns AuthorizationPolicy name
Expand All @@ -99,10 +96,11 @@ func (d *AuthorizationPolicy) Check(ctx context.Context, model interface{}) erro
if err != nil {
return err
}
if intErr := d.init(); intErr != nil {
evalQuery, intErr := d.init()
if intErr != nil {
return intErr
}
rs, err := d.evalQuery.Eval(ctx, rego.EvalInput(input))
rs, err := evalQuery.Eval(ctx, rego.EvalInput(input))
if err != nil {
return status.Error(codes.Internal, err.Error())
}
Expand All @@ -116,33 +114,23 @@ func (d *AuthorizationPolicy) Check(ctx context.Context, model interface{}) erro
return nil
}

func (d *AuthorizationPolicy) init() error {
d.once.Do(func() {
if d.query == "" {
d.query = strings.TrimSuffix(filepath.Base(d.policyFilePath), filepath.Ext(d.policyFilePath))
}
if d.initErr = d.loadSource(); d.initErr != nil {
return
}
if d.initErr = d.checkModule(); d.initErr != nil {
return
}
var r rego.PreparedEvalQuery
r, d.initErr = rego.New(
rego.Query(strings.Join([]string{"data", d.pkg, d.query}, ".")),
rego.Module(d.pkg, d.policySource)).PrepareForEval(context.Background())
if d.initErr != nil {
return
}
d.evalQuery = &r
})
if d.initErr != nil {
return d.initErr
func (d *AuthorizationPolicy) init() (*rego.PreparedEvalQuery, error) {
if d.query == "" {
d.query = strings.TrimSuffix(filepath.Base(d.policyFilePath), filepath.Ext(d.policyFilePath))
}
if d.evalQuery == nil {
return errors.Errorf("policy %v is not compiled", d.policySource)
if err := d.loadSource(); err != nil {
return nil, err
}
return nil
if err := d.checkModule(); err != nil {
return nil, err
}
r, err := rego.New(
rego.Query(strings.Join([]string{"data", d.pkg, d.query}, ".")),
rego.Module(d.pkg, d.policySource)).PrepareForEval(context.Background())
if err != nil {
return nil, errors.Wrap(err, fmt.Sprintf("policy %v is not compiled", d.policySource))
}
return &r, nil
}

func (d *AuthorizationPolicy) loadSource() error {
Expand Down
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