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//go:build go1.9 && s3crypto_integ
// +build go1.9,s3crypto_integ
package s3crypto_test
import (
"bytes"
"encoding/base64"
"fmt"
"io/ioutil"
"strings"
"testing"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/awstesting/integration"
"github.com/aws/aws-sdk-go/service/kms"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3crypto"
)
func TestInteg_EncryptFixtures(t *testing.T) {
sess := integration.SessionWithDefaultRegion("us-west-2")
const bucket = "aws-s3-shared-tests"
const version = "version_2"
cases := []struct {
CEKAlg string
KEK, V1, V2, CEK string
}{
{
CEKAlg: "aes_gcm",
KEK: "kms", V1: "AWS_SDK_TEST_ALIAS", V2: "us-west-2", CEK: "aes_gcm",
},
{
CEKAlg: "aes_cbc",
KEK: "kms", V1: "AWS_SDK_TEST_ALIAS", V2: "us-west-2", CEK: "aes_cbc",
},
}
for _, c := range cases {
t.Run(c.CEKAlg, func(t *testing.T) {
s3Client := s3.New(sess)
fixtures := getFixtures(t, s3Client, c.CEKAlg, bucket)
builder, masterKey := getEncryptFixtureBuilder(t, c.KEK, c.V1, c.V2, c.CEK)
encClient := s3crypto.NewEncryptionClient(sess, builder)
for caseKey, plaintext := range fixtures.Plaintexts {
_, err := encClient.PutObject(&s3.PutObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(
fmt.Sprintf("%s/%s/language_Go/ciphertext_test_case_%s",
fixtures.BaseFolder, version, caseKey),
),
Body: bytes.NewReader(plaintext),
Metadata: map[string]*string{
"Masterkey": &masterKey,
},
})
if err != nil {
t.Fatalf("failed to upload encrypted fixture, %v", err)
}
}
})
}
}
func TestInteg_DecryptFixtures(t *testing.T) {
sess := integration.SessionWithDefaultRegion("us-west-2")
const bucket = "aws-s3-shared-tests"
const version = "version_2"
cases := []struct {
CEKAlg string
Lang string
}{
{CEKAlg: "aes_cbc", Lang: "Go"},
{CEKAlg: "aes_gcm", Lang: "Go"},
{CEKAlg: "aes_cbc", Lang: "Java"},
{CEKAlg: "aes_gcm", Lang: "Java"},
}
for _, c := range cases {
t.Run(c.CEKAlg+"-"+c.Lang, func(t *testing.T) {
decClient := s3crypto.NewDecryptionClient(sess)
s3Client := s3.New(sess)
fixtures := getFixtures(t, s3Client, c.CEKAlg, bucket)
ciphertexts := decryptFixtures(t, decClient, s3Client, fixtures, bucket, c.Lang, version)
for caseKey, ciphertext := range ciphertexts {
if e, a := len(fixtures.Plaintexts[caseKey]), len(ciphertext); e != a {
t.Errorf("expect %v text len, got %v", e, a)
}
if e, a := fixtures.Plaintexts[caseKey], ciphertext; !bytes.Equal(e, a) {
t.Errorf("expect %v text, got %v", e, a)
}
}
})
}
}
type testFixtures struct {
BaseFolder string
Plaintexts map[string][]byte
}
func getFixtures(t *testing.T, s3Client *s3.S3, cekAlg, bucket string) testFixtures {
t.Helper()
prefix := "plaintext_test_case_"
baseFolder := "crypto_tests/" + cekAlg
out, err := s3Client.ListObjects(&s3.ListObjectsInput{
Bucket: aws.String(bucket),
Prefix: aws.String(baseFolder + "/" + prefix),
})
if err != nil {
t.Fatalf("unable to list fixtures %v", err)
}
plaintexts := map[string][]byte{}
for _, obj := range out.Contents {
ptObj, err := s3Client.GetObject(&s3.GetObjectInput{
Bucket: aws.String(bucket),
Key: obj.Key,
})
if err != nil {
t.Fatalf("unable to get fixture object %s, %v", *obj.Key, err)
}
caseKey := strings.TrimPrefix(*obj.Key, baseFolder+"/"+prefix)
plaintext, err := ioutil.ReadAll(ptObj.Body)
if err != nil {
t.Fatalf("unable to read fixture object %s, %v", *obj.Key, err)
}
plaintexts[caseKey] = plaintext
}
return testFixtures{
BaseFolder: baseFolder,
Plaintexts: plaintexts,
}
}
func getEncryptFixtureBuilder(t *testing.T, kek, v1, v2, cek string,
) (builder s3crypto.ContentCipherBuilder, masterKey string) {
t.Helper()
var handler s3crypto.CipherDataGenerator
switch kek {
case "kms":
arn, err := getAliasInformation(v1, v2)
if err != nil {
t.Fatalf("failed to get fixture alias info for %s, %v", v1, err)
}
masterKey = base64.StdEncoding.EncodeToString([]byte(arn))
if err != nil {
t.Fatalf("failed to encode alias's arn %v", err)
}
kmsSvc := kms.New(integration.Session, &aws.Config{
Region: &v2,
})
handler = s3crypto.NewKMSKeyGenerator(kmsSvc, arn)
default:
t.Fatalf("unknown fixture KEK, %v", kek)
}
switch cek {
case "aes_gcm":
builder = s3crypto.AESGCMContentCipherBuilder(handler)
case "aes_cbc":
builder = s3crypto.AESCBCContentCipherBuilder(handler, s3crypto.AESCBCPadder)
default:
t.Fatalf("unknown fixture CEK, %v", cek)
}
return builder, masterKey
}
func getAliasInformation(alias, region string) (string, error) {
arn := ""
svc := kms.New(integration.Session, &aws.Config{
Region: ®ion,
})
truncated := true
var marker *string
for truncated {
out, err := svc.ListAliases(&kms.ListAliasesInput{
Marker: marker,
})
if err != nil {
return arn, err
}
for _, aliasEntry := range out.Aliases {
if *aliasEntry.AliasName == "alias/"+alias {
return *aliasEntry.AliasArn, nil
}
}
truncated = *out.Truncated
marker = out.NextMarker
}
return "", fmt.Errorf("kms alias %s does not exist", alias)
}
func decryptFixtures(t *testing.T, decClient *s3crypto.DecryptionClient, s3Client *s3.S3,
fixtures testFixtures, bucket, lang, version string,
) map[string][]byte {
t.Helper()
prefix := "ciphertext_test_case_"
lang = "language_" + lang
ciphertexts := map[string][]byte{}
for caseKey := range fixtures.Plaintexts {
cipherKey := fixtures.BaseFolder + "/" + version + "/" + lang + "/" + prefix + caseKey
// To get metadata for encryption key
ctObj, err := s3Client.GetObject(&s3.GetObjectInput{
Bucket: &bucket,
Key: &cipherKey,
})
if err != nil {
// TODO error?
continue
}
// We don't support wrap, so skip it
if ctObj.Metadata["X-Amz-Wrap-Alg"] == nil || *ctObj.Metadata["X-Amz-Wrap-Alg"] != "kms" {
continue
}
ctObj, err = decClient.GetObject(&s3.GetObjectInput{
Bucket: &bucket,
Key: &cipherKey,
})
if err != nil {
t.Fatalf("failed to get encrypted object %v", err)
}
ciphertext, err := ioutil.ReadAll(ctObj.Body)
if err != nil {
t.Fatalf("failed to read object data %v", err)
}
ciphertexts[caseKey] = ciphertext
}
return ciphertexts
}
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