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package s3crypto
import (
"bytes"
"encoding/base64"
"encoding/hex"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"reflect"
"strings"
"testing"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/awstesting/unit"
"github.com/aws/aws-sdk-go/service/kms"
)
func TestKmsContextKeyHandler_GenerateCipherDataWithCEKAlg(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
bodyBytes, err := ioutil.ReadAll(r.Body)
if err != nil {
w.WriteHeader(500)
return
}
var body map[string]interface{}
err = json.Unmarshal(bodyBytes, &body)
if err != nil {
w.WriteHeader(500)
return
}
md, ok := body["EncryptionContext"].(map[string]interface{})
if !ok {
w.WriteHeader(500)
return
}
exEncContext := map[string]interface{}{
"aws:" + cekAlgorithmHeader: "cekAlgValue",
}
if e, a := exEncContext, md; !reflect.DeepEqual(e, a) {
w.WriteHeader(500)
t.Errorf("expected %v, got %v", e, a)
return
}
fmt.Fprintln(w, `{"CiphertextBlob":"AQEDAHhqBCCY1MSimw8gOGcUma79cn4ANvTtQyv9iuBdbcEF1QAAAH4wfAYJKoZIhvcNAQcGoG8wbQIBADBoBgkqhkiG9w0BBwEwHgYJYIZIAWUDBAEuMBEEDJ6IcN5E4wVbk38MNAIBEIA7oF1E3lS7FY9DkoxPc/UmJsEwHzL82zMqoLwXIvi8LQHr8If4Lv6zKqY8u0+JRgSVoqCvZDx3p8Cn6nM=","KeyId":"arn:aws:kms:us-west-2:042062605278:key/c80a5cdb-8d09-4f9f-89ee-df01b2e3870a","Plaintext":"6tmyz9JLBE2yIuU7iXpArqpDVle172WSmxjcO6GNT7E="}`)
}))
defer ts.Close()
sess := unit.Session.Copy(&aws.Config{
MaxRetries: aws.Int(0),
Endpoint: aws.String(ts.URL),
DisableSSL: aws.Bool(true),
S3ForcePathStyle: aws.Bool(true),
Region: aws.String("us-west-2"),
})
svc := kms.New(sess)
handler := NewKMSContextKeyGenerator(svc, "testid", nil)
keySize := 32
ivSize := 16
cd, err := handler.GenerateCipherDataWithCEKAlg(aws.BackgroundContext(), keySize, ivSize, "cekAlgValue")
if err != nil {
t.Errorf("expected no error, but received %v", err)
}
if keySize != len(cd.Key) {
t.Errorf("expected %d, but received %d", keySize, len(cd.Key))
}
if ivSize != len(cd.IV) {
t.Errorf("expected %d, but received %d", ivSize, len(cd.IV))
}
}
func TestKmsContextKeyHandler_GenerateCipherDataWithCEKAlg_ReservedKeyConflict(t *testing.T) {
svc := kms.New(unit.Session.Copy())
handler := NewKMSContextKeyGenerator(svc, "testid", MaterialDescription{
"aws:x-amz-cek-alg": aws.String("something unexpected"),
})
_, err := handler.GenerateCipherDataWithCEKAlg(aws.BackgroundContext(), 32, 16, "cekAlgValue")
if err == nil {
t.Errorf("expected error, but none")
} else if !strings.Contains(err.Error(), "conflict in reserved KMS Encryption Context key aws:x-amz-cek-alg") {
t.Errorf("expected reserved key error, got %v", err)
}
}
func TestKmsContextKeyHandler_DecryptKey(t *testing.T) {
key, _ := hex.DecodeString("31bdadd96698c204aa9ce1448ea94ae1fb4a9a0b3c9d773b51bb1822666b8f22")
keyB64 := base64.URLEncoding.EncodeToString(key)
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
bodyBytes, err := ioutil.ReadAll(r.Body)
if err != nil {
t.Errorf("expected no error, got %v", err)
w.WriteHeader(500)
return
}
var body map[string]interface{}
err = json.Unmarshal(bodyBytes, &body)
if err != nil {
w.WriteHeader(500)
return
}
if _, ok := body["KeyId"]; ok {
t.Errorf("expected CMK to not be sent")
}
md, ok := body["EncryptionContext"].(map[string]interface{})
if !ok {
w.WriteHeader(500)
return
}
exEncContext := map[string]interface{}{
"aws:" + cekAlgorithmHeader: "AES/GCM/NoPadding",
}
if e, a := exEncContext, md; !reflect.DeepEqual(e, a) {
w.WriteHeader(500)
t.Errorf("expected %v, got %v", e, a)
return
}
fmt.Fprintln(w, fmt.Sprintf("%s%s%s", `{"KeyId":"test-key-id","Plaintext":"`, keyB64, `"}`))
}))
defer ts.Close()
sess := unit.Session.Copy(&aws.Config{
MaxRetries: aws.Int(0),
Endpoint: aws.String(ts.URL),
DisableSSL: aws.Bool(true),
S3ForcePathStyle: aws.Bool(true),
Region: aws.String("us-west-2"),
})
handler, err := newKMSContextWrapEntryWithAnyCMK(kms.New(sess))(Envelope{WrapAlg: KMSContextWrap, CEKAlg: "AES/GCM/NoPadding", MatDesc: `{"aws:x-amz-cek-alg": "AES/GCM/NoPadding"}`})
if err != nil {
t.Fatalf("expected no error, but received %v", err)
}
plaintextKey, err := handler.DecryptKey([]byte{1, 2, 3, 4})
if err != nil {
t.Errorf("expected no error, but received %v", err)
}
if !bytes.Equal(key, plaintextKey) {
t.Errorf("expected %v, but received %v", key, plaintextKey)
}
}
func TestKmsContextKeyHandler_decryptHandler_MismatchCEK(t *testing.T) {
_, err := newKMSContextWrapEntryWithAnyCMK(kms.New(unit.Session.Copy()))(Envelope{WrapAlg: KMSContextWrap, CEKAlg: "MismatchCEKValue", MatDesc: `{"aws:x-amz-cek-alg": "AES/GCM/NoPadding"}`})
if err == nil {
t.Fatal("expected error, but got none")
}
if e, a := "algorithm used at encryption time does not match the algorithm stored", err.Error(); !strings.Contains(a, e) {
t.Errorf("expected error to contain %v, got %v", e, a)
}
}
func TestKmsContextKeyHandler_decryptHandler_MissingContextKey(t *testing.T) {
_, err := newKMSContextWrapEntryWithAnyCMK(kms.New(unit.Session.Copy()))(Envelope{WrapAlg: KMSContextWrap, CEKAlg: "AES/GCM/NoPadding", MatDesc: `{}`})
if err == nil {
t.Fatal("expected error, but got none")
}
if e, a := "missing from encryption context", err.Error(); !strings.Contains(a, e) {
t.Errorf("expected error to contain %v, got %v", e, a)
}
}
func TestKmsContextKeyHandler_decryptHandler_MismatchWrap(t *testing.T) {
_, err := newKMSContextWrapEntryWithAnyCMK(kms.New(unit.Session.Copy()))(Envelope{WrapAlg: KMSWrap, CEKAlg: "AES/GCM/NoPadding", MatDesc: `{}`})
if err == nil {
t.Fatal("expected error, but got none")
}
if e, a := "x-amz-cek-alg value `kms` did not match the expected algorithm `kms+context` for this handler", err.Error(); !strings.Contains(a, e) {
t.Errorf("expected error to contain %v, got %v", e, a)
}
}
func TestKmsContextKeyHandler_DecryptKey_WithCMK(t *testing.T) {
key, _ := hex.DecodeString("31bdadd96698c204aa9ce1448ea94ae1fb4a9a0b3c9d773b51bb1822666b8f22")
keyB64 := base64.URLEncoding.EncodeToString(key)
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
t.Errorf("expected no error, got %v", err)
w.WriteHeader(500)
return
}
if !bytes.Contains(body, []byte(`"KeyId":"thisKey"`)) {
t.Errorf("expected CMK to be sent")
}
fmt.Fprintln(w, fmt.Sprintf("%s%s%s", `{"KeyId":"thisKey","Plaintext":"`, keyB64, `"}`))
}))
defer ts.Close()
sess := unit.Session.Copy(&aws.Config{
MaxRetries: aws.Int(0),
Endpoint: aws.String(ts.URL),
DisableSSL: aws.Bool(true),
S3ForcePathStyle: aws.Bool(true),
Region: aws.String("us-west-2"),
})
handler, err := newKMSContextWrapEntryWithCMK(kms.New(sess), "thisKey")(Envelope{WrapAlg: KMSContextWrap, CEKAlg: "AES/GCM/NoPadding", MatDesc: `{"aws:x-amz-cek-alg": "AES/GCM/NoPadding"}`})
if err != nil {
t.Errorf("expected no error, but received %v", err)
}
_, err = handler.DecryptKey([]byte{1, 2, 3, 4})
if err != nil {
t.Errorf("expected no error, but received %v", err)
}
}
func TestRegisterKMSContextWrapWithAnyCMK(t *testing.T) {
kmsClient := kms.New(unit.Session.Copy())
cr := NewCryptoRegistry()
if err := RegisterKMSContextWrapWithAnyCMK(cr, kmsClient); err != nil {
t.Errorf("expected no error, got %v", err)
}
if wrap, ok := cr.GetWrap(KMSContextWrap); !ok {
t.Errorf("expected wrapped to be present")
} else if wrap == nil {
t.Errorf("expected wrap to not be nil")
}
if err := RegisterKMSContextWrapWithCMK(cr, kmsClient, "test-key-id"); err == nil {
t.Error("expected error, got none")
}
}
func TestRegisterKMSContextWrapWithCMK(t *testing.T) {
kmsClient := kms.New(unit.Session.Copy())
cr := NewCryptoRegistry()
if err := RegisterKMSContextWrapWithCMK(cr, kmsClient, "cmkId"); err != nil {
t.Errorf("expected no error, got %v", err)
}
if wrap, ok := cr.GetWrap(KMSContextWrap); !ok {
t.Errorf("expected wrapped to be present")
} else if wrap == nil {
t.Errorf("expected wrap to not be nil")
}
if err := RegisterKMSContextWrapWithAnyCMK(cr, kmsClient); err == nil {
t.Error("expected error, got none")
}
}
|
