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//
// Copyright 2022 The Sigstore Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pem
import (
"bytes"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"reflect"
"testing"
"github.com/sigstore/sigstore/pkg/cryptoutils"
)
func FuzzLoadCertificates(f *testing.F) {
f.Fuzz(func(t *testing.T, data []byte) {
b, _ := pem.Decode(data)
if b == nil {
t.Skip("invalid pem")
}
result, err := cryptoutils.LoadCertificatesFromPEM(bytes.NewReader(data))
if err != nil {
if result != nil {
t.Errorf("result %v should be nil when there is an error %v", result, err)
}
t.Skip("invalid pem")
}
for _, cert := range result {
if len(cert.Raw) == 0 {
t.Errorf("x509 cert raw is empty")
}
}
})
}
func FuzzUnmarshalCertificatesFromPEM(f *testing.F) {
f.Fuzz(func(t *testing.T, data []byte) {
b, _ := pem.Decode(data)
if b == nil {
t.Skip("invalid pem")
}
result, err := cryptoutils.UnmarshalCertificatesFromPEM(data)
if err != nil {
if result != nil {
t.Errorf("result %v should be nil when there is an error %v", result, err)
}
t.Skip("invalid pem")
}
for _, cert := range result {
if len(cert.Raw) == 0 {
t.Errorf("x509 cert raw is empty")
}
}
})
}
func FuzzUnmarshalPEMToPublicKey(f *testing.F) {
f.Fuzz(func(t *testing.T, data []byte) {
b, _ := pem.Decode(data)
if b == nil {
t.Skip("invalid pem")
}
result, err := cryptoutils.UnmarshalPEMToPublicKey(data)
if err != nil {
if result != nil && !reflect.ValueOf(result).IsNil() {
t.Errorf("result %v should be nil when there is an error %v", result, err)
}
t.Skip("invalid pem")
}
if result == nil {
t.Errorf("result %v should not be nil", result)
}
})
}
func FuzzCertificate(f *testing.F) {
f.Fuzz(func(t *testing.T, withLimited bool, pemBytes []byte, iterations int) {
var certs []*x509.Certificate
var err error
if withLimited {
certs, err = cryptoutils.UnmarshalCertificatesFromPEMLimited(pemBytes, iterations)
if err != nil {
return
}
cryptoutils.MarshalCertificatesToPEM(certs)
} else {
certs, err = cryptoutils.UnmarshalCertificatesFromPEM(pemBytes)
if err != nil {
return
}
cryptoutils.MarshalCertificatesToPEM(certs)
}
for _, cert := range certs {
cryptoutils.GetSubjectAlternateNames(cert)
}
})
}
func FuzzPrivateKey(f *testing.F) {
f.Fuzz(func(t *testing.T, pemBytes, password []byte) {
passFunc := cryptoutils.StaticPasswordFunc(password)
privateKey, err := cryptoutils.UnmarshalPEMToPrivateKey(pemBytes, passFunc)
if err != nil {
return
}
cryptoutils.MarshalPrivateKeyToPEM(privateKey)
cryptoutils.MarshalPrivateKeyToEncryptedDER(privateKey, passFunc)
})
}
func FuzzPublicKey(f *testing.F) {
f.Fuzz(func(t *testing.T, firstKeyBytes, secondKeyBytes []byte) {
first, err := cryptoutils.UnmarshalPEMToPublicKey(firstKeyBytes)
if err != nil {
return
}
err = cryptoutils.ValidatePubKey(first)
if err != nil {
return
}
second, err := cryptoutils.UnmarshalPEMToPublicKey(secondKeyBytes)
if err != nil {
return
}
err = cryptoutils.ValidatePubKey(first)
if err != nil {
return
}
cryptoutils.EqualKeys(first, second)
cryptoutils.MarshalPublicKeyToPEM(first)
cryptoutils.MarshalPublicKeyToPEM(second)
cryptoutils.SKID(first)
cryptoutils.SKID(second)
})
}
func FuzzUnmarshalOtherNameSAN(f *testing.F) {
f.Fuzz(func(t *testing.T, value []byte) {
exts := []pkix.Extension{
pkix.Extension{
Id: cryptoutils.SANOID,
Value: value,
},
}
cryptoutils.UnmarshalOtherNameSAN(exts)
})
}
func FuzzMarshalUnmarshalOtherNameSAN(f *testing.F) {
f.Fuzz(func(t *testing.T, name string, critical bool) {
ext, err := cryptoutils.MarshalOtherNameSAN(name, critical)
if err != nil {
return
}
exts := []pkix.Extension{*ext}
cryptoutils.UnmarshalOtherNameSAN(exts)
})
}
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