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Encrypt remote target if kms is configured (#11034)

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Co-authored-by: Poorna Krishnamoorthy <poorna@minio.io>
This commit is contained in:
Poorna Krishnamoorthy 2020-12-21 16:21:33 -08:00 committed by GitHub
parent 2ecaab55a6
commit c987313431
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 178 additions and 38 deletions
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1
cmd/admin-bucket-handlers.go
View File

@ -194,7 +194,6 @@ func (a adminAPIHandlers) SetRemoteTargetHandler(w http.ResponseWriter, r *http.
writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrAdminConfigBadJSON, err), r.URL)
return
}
if err = globalBucketMetadataSys.Update(bucket, bucketTargetsFile, tgtBytes); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return

6
cmd/bucket-metadata-sys.go
View File

@ -24,6 +24,7 @@ import (
"sync"
"github.com/minio/minio-go/v7/pkg/tags"
"github.com/minio/minio/cmd/crypto"
"github.com/minio/minio/cmd/logger"
bucketsse "github.com/minio/minio/pkg/bucket/encryption"
"github.com/minio/minio/pkg/bucket/lifecycle"
@ -168,7 +169,10 @@ func (sys *BucketMetadataSys) Update(bucket string, configFile string, configDat
}
meta.ReplicationConfigXML = configData
case bucketTargetsFile:
meta.BucketTargetsConfigJSON = configData
meta.BucketTargetsConfigJSON, meta.BucketTargetsConfigMetaJSON, err = encryptBucketMetadata(meta.Name, configData, crypto.Context{bucket: meta.Name, bucketTargetsFile: bucketTargetsFile})
if err != nil {
return fmt.Errorf("Error encrypting bucket target metadata %w", err)
}
default:
return fmt.Errorf("Unknown bucket %s metadata update requested %s", bucket, configFile)
}

95
cmd/bucket-metadata.go
View File

@ -19,6 +19,7 @@ package cmd
import (
"bytes"
"context"
"crypto/rand"
"encoding/binary"
"encoding/json"
"encoding/xml"
@ -28,6 +29,7 @@ import (
"time"
"github.com/minio/minio-go/v7/pkg/tags"
"github.com/minio/minio/cmd/crypto"
"github.com/minio/minio/cmd/logger"
bucketsse "github.com/minio/minio/pkg/bucket/encryption"
"github.com/minio/minio/pkg/bucket/lifecycle"
@ -37,6 +39,7 @@ import (
"github.com/minio/minio/pkg/bucket/versioning"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/madmin"
"github.com/minio/sio"
)
const (
@ -74,6 +77,7 @@ type BucketMetadata struct {
QuotaConfigJSON []byte
ReplicationConfigXML []byte
BucketTargetsConfigJSON []byte
BucketTargetsConfigMetaJSON []byte
// Unexported fields. Must be updated atomically.
policyConfig *policy.Policy
@ -86,6 +90,7 @@ type BucketMetadata struct {
quotaConfig *madmin.BucketQuota
replicationConfig *replication.Config
bucketTargetConfig *madmin.BucketTargets
bucketTargetConfigMeta map[string]string
}
// newBucketMetadata creates BucketMetadata with the supplied name and Created to Now.
@ -101,6 +106,7 @@ func newBucketMetadata(name string) BucketMetadata {
XMLNS: "http://s3.amazonaws.com/doc/2006-03-01/",
},
bucketTargetConfig: &madmin.BucketTargets{},
bucketTargetConfigMeta: make(map[string]string),
}
}
@ -140,16 +146,16 @@ func (b *BucketMetadata) Load(ctx context.Context, api ObjectLayer, name string)
func loadBucketMetadata(ctx context.Context, objectAPI ObjectLayer, bucket string) (BucketMetadata, error) {
b := newBucketMetadata(bucket)
err := b.Load(ctx, objectAPI, b.Name)
if err == nil {
return b, b.convertLegacyConfigs(ctx, objectAPI)
}
if !errors.Is(err, errConfigNotFound) {
if err != nil && !errors.Is(err, errConfigNotFound) {
return b, err
}
// Old bucket without bucket metadata. Hence we migrate existing settings.
return b, b.convertLegacyConfigs(ctx, objectAPI)
if err := b.convertLegacyConfigs(ctx, objectAPI); err != nil {
return b, err
}
// migrate unencrypted remote targets
return b, b.migrateTargetConfig(ctx, objectAPI)
}
// parseAllConfigs will parse all configs and populate the private fields.
@ -234,7 +240,8 @@ func (b *BucketMetadata) parseAllConfigs(ctx context.Context, objectAPI ObjectLa
}
if len(b.BucketTargetsConfigJSON) != 0 {
if err = json.Unmarshal(b.BucketTargetsConfigJSON, b.bucketTargetConfig); err != nil {
b.bucketTargetConfig, err = parseBucketTargetConfig(b.Name, b.BucketTargetsConfigJSON, b.BucketTargetsConfigMetaJSON)
if err != nil {
return err
}
} else {
@ -354,6 +361,7 @@ func (b *BucketMetadata) Save(ctx context.Context, api ObjectLayer) error {
if err != nil {
return err
}
configFile := path.Join(bucketConfigPrefix, b.Name, bucketMetadataFile)
return saveConfig(ctx, api, configFile, data)
}
@ -373,3 +381,76 @@ func deleteBucketMetadata(ctx context.Context, obj objectDeleter, bucket string)
}
return nil
}
// migrate config for remote targets by encrypting data if currently unencrypted and kms is configured.
func (b *BucketMetadata) migrateTargetConfig(ctx context.Context, objectAPI ObjectLayer) error {
var err error
// early return if no targets or already encrypted
if len(b.BucketTargetsConfigJSON) == 0 || GlobalKMS == nil || len(b.BucketTargetsConfigMetaJSON) != 0 {
return nil
}
encBytes, metaBytes, err := encryptBucketMetadata(b.Name, b.BucketTargetsConfigJSON, crypto.Context{b.Name: b.Name, bucketTargetsFile: bucketTargetsFile})
if err != nil {
return err
}
b.BucketTargetsConfigJSON = encBytes
b.BucketTargetsConfigMetaJSON = metaBytes
return b.Save(ctx, objectAPI)
}
// encrypt bucket metadata if kms is configured.
func encryptBucketMetadata(bucket string, input []byte, kmsContext crypto.Context) (output, metabytes []byte, err error) {
var sealedKey crypto.SealedKey
if GlobalKMS == nil {
output = input
return
}
var (
key [32]byte
encKey []byte
)
metadata := make(map[string]string)
key, encKey, err = GlobalKMS.GenerateKey(GlobalKMS.DefaultKeyID(), kmsContext)
if err != nil {
return
}
outbuf := bytes.NewBuffer(nil)
objectKey := crypto.GenerateKey(key, rand.Reader)
sealedKey = objectKey.Seal(key, crypto.GenerateIV(rand.Reader), crypto.S3.String(), bucket, "")
crypto.S3.CreateMetadata(metadata, GlobalKMS.DefaultKeyID(), encKey, sealedKey)
_, err = sio.Encrypt(outbuf, bytes.NewBuffer(input), sio.Config{Key: objectKey[:], MinVersion: sio.Version20})
if err != nil {
return output, metabytes, err
}
metabytes, err = json.Marshal(metadata)
if err != nil {
return
}
return outbuf.Bytes(), metabytes, nil
}
// decrypt bucket metadata if kms is configured.
func decryptBucketMetadata(input []byte, bucket string, meta map[string]string, kmsContext crypto.Context) ([]byte, error) {
if GlobalKMS == nil {
return nil, errKMSNotConfigured
}
keyID, kmsKey, sealedKey, err := crypto.S3.ParseMetadata(meta)
if err != nil {
return nil, err
}
extKey, err := GlobalKMS.UnsealKey(keyID, kmsKey, kmsContext)
if err != nil {
return nil, err
}
var objectKey crypto.ObjectKey
if err = objectKey.Unseal(extKey, sealedKey, crypto.S3.String(), bucket, ""); err != nil {
return nil, err
}
outbuf := bytes.NewBuffer(nil)
_, err = sio.Decrypt(outbuf, bytes.NewBuffer(input), sio.Config{Key: objectKey[:], MinVersion: sio.Version20})
return outbuf.Bytes(), err
}

35
cmd/bucket-metadata_gen.go
View File

@ -102,6 +102,12 @@ func (z *BucketMetadata) DecodeMsg(dc *msgp.Reader) (err error) {
err = msgp.WrapError(err, "BucketTargetsConfigJSON")
return
}
case "BucketTargetsConfigMetaJSON":
z.BucketTargetsConfigMetaJSON, err = dc.ReadBytes(z.BucketTargetsConfigMetaJSON)
if err != nil {
err = msgp.WrapError(err, "BucketTargetsConfigMetaJSON")
return
}
default:
err = dc.Skip()
if err != nil {
@ -115,9 +121,9 @@ func (z *BucketMetadata) DecodeMsg(dc *msgp.Reader) (err error) {
// EncodeMsg implements msgp.Encodable
func (z *BucketMetadata) EncodeMsg(en *msgp.Writer) (err error) {
// map header, size 13
// map header, size 14
// write "Name"
err = en.Append(0x8d, 0xa4, 0x4e, 0x61, 0x6d, 0x65)
err = en.Append(0x8e, 0xa4, 0x4e, 0x61, 0x6d, 0x65)
if err != nil {
return
}
@ -246,15 +252,25 @@ func (z *BucketMetadata) EncodeMsg(en *msgp.Writer) (err error) {
err = msgp.WrapError(err, "BucketTargetsConfigJSON")
return
}
// write "BucketTargetsConfigMetaJSON"
err = en.Append(0xbb, 0x42, 0x75, 0x63, 0x6b, 0x65, 0x74, 0x54, 0x61, 0x72, 0x67, 0x65, 0x74, 0x73, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x4d, 0x65, 0x74, 0x61, 0x4a, 0x53, 0x4f, 0x4e)
if err != nil {
return
}
err = en.WriteBytes(z.BucketTargetsConfigMetaJSON)
if err != nil {
err = msgp.WrapError(err, "BucketTargetsConfigMetaJSON")
return
}
return
}
// MarshalMsg implements msgp.Marshaler
func (z *BucketMetadata) MarshalMsg(b []byte) (o []byte, err error) {
o = msgp.Require(b, z.Msgsize())
// map header, size 13
// map header, size 14
// string "Name"
o = append(o, 0x8d, 0xa4, 0x4e, 0x61, 0x6d, 0x65)
o = append(o, 0x8e, 0xa4, 0x4e, 0x61, 0x6d, 0x65)
o = msgp.AppendString(o, z.Name)
// string "Created"
o = append(o, 0xa7, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x64)
@ -292,6 +308,9 @@ func (z *BucketMetadata) MarshalMsg(b []byte) (o []byte, err error) {
// string "BucketTargetsConfigJSON"
o = append(o, 0xb7, 0x42, 0x75, 0x63, 0x6b, 0x65, 0x74, 0x54, 0x61, 0x72, 0x67, 0x65, 0x74, 0x73, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x4a, 0x53, 0x4f, 0x4e)
o = msgp.AppendBytes(o, z.BucketTargetsConfigJSON)
// string "BucketTargetsConfigMetaJSON"
o = append(o, 0xbb, 0x42, 0x75, 0x63, 0x6b, 0x65, 0x74, 0x54, 0x61, 0x72, 0x67, 0x65, 0x74, 0x73, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x4d, 0x65, 0x74, 0x61, 0x4a, 0x53, 0x4f, 0x4e)
o = msgp.AppendBytes(o, z.BucketTargetsConfigMetaJSON)
return
}
@ -391,6 +410,12 @@ func (z *BucketMetadata) UnmarshalMsg(bts []byte) (o []byte, err error) {
err = msgp.WrapError(err, "BucketTargetsConfigJSON")
return
}
case "BucketTargetsConfigMetaJSON":
z.BucketTargetsConfigMetaJSON, bts, err = msgp.ReadBytesBytes(bts, z.BucketTargetsConfigMetaJSON)
if err != nil {
err = msgp.WrapError(err, "BucketTargetsConfigMetaJSON")
return
}
default:
bts, err = msgp.Skip(bts)
if err != nil {
@ -405,6 +430,6 @@ func (z *BucketMetadata) UnmarshalMsg(bts []byte) (o []byte, err error) {
// Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message
func (z *BucketMetadata) Msgsize() (s int) {
s = 1 + 5 + msgp.StringPrefixSize + len(z.Name) + 8 + msgp.TimeSize + 12 + msgp.BoolSize + 17 + msgp.BytesPrefixSize + len(z.PolicyConfigJSON) + 22 + msgp.BytesPrefixSize + len(z.NotificationConfigXML) + 19 + msgp.BytesPrefixSize + len(z.LifecycleConfigXML) + 20 + msgp.BytesPrefixSize + len(z.ObjectLockConfigXML) + 20 + msgp.BytesPrefixSize + len(z.VersioningConfigXML) + 20 + msgp.BytesPrefixSize + len(z.EncryptionConfigXML) + 17 + msgp.BytesPrefixSize + len(z.TaggingConfigXML) + 16 + msgp.BytesPrefixSize + len(z.QuotaConfigJSON) + 21 + msgp.BytesPrefixSize + len(z.ReplicationConfigXML) + 24 + msgp.BytesPrefixSize + len(z.BucketTargetsConfigJSON)
s = 1 + 5 + msgp.StringPrefixSize + len(z.Name) + 8 + msgp.TimeSize + 12 + msgp.BoolSize + 17 + msgp.BytesPrefixSize + len(z.PolicyConfigJSON) + 22 + msgp.BytesPrefixSize + len(z.NotificationConfigXML) + 19 + msgp.BytesPrefixSize + len(z.LifecycleConfigXML) + 20 + msgp.BytesPrefixSize + len(z.ObjectLockConfigXML) + 20 + msgp.BytesPrefixSize + len(z.VersioningConfigXML) + 20 + msgp.BytesPrefixSize + len(z.EncryptionConfigXML) + 17 + msgp.BytesPrefixSize + len(z.TaggingConfigXML) + 16 + msgp.BytesPrefixSize + len(z.QuotaConfigJSON) + 21 + msgp.BytesPrefixSize + len(z.ReplicationConfigXML) + 24 + msgp.BytesPrefixSize + len(z.BucketTargetsConfigJSON) + 28 + msgp.BytesPrefixSize + len(z.BucketTargetsConfigMetaJSON)
return
}

31
cmd/bucket-targets.go
View File

@ -19,6 +19,7 @@ package cmd
import (
"context"
"encoding/hex"
"encoding/json"
"net/http"
"strings"
"sync"
@ -27,6 +28,7 @@ import (
minio "github.com/minio/minio-go/v7"
miniogo "github.com/minio/minio-go/v7"
"github.com/minio/minio-go/v7/pkg/credentials"
"github.com/minio/minio/cmd/crypto"
"github.com/minio/minio/pkg/bucket/versioning"
"github.com/minio/minio/pkg/madmin"
sha256 "github.com/minio/sha256-simd"
@ -391,3 +393,32 @@ func generateARN(t *madmin.BucketTarget) string {
}
return arn.String()
}
// Returns parsed target config. If KMS is configured, remote target is decrypted
func parseBucketTargetConfig(bucket string, cdata, cmetadata []byte) (*madmin.BucketTargets, error) {
var (
data []byte
err error
t madmin.BucketTargets
meta map[string]string
)
if len(cdata) == 0 {
return nil, nil
}
data = cdata
if len(cmetadata) != 0 {
if err := json.Unmarshal(cmetadata, &meta); err != nil {
return nil, err
}
if crypto.S3.IsEncrypted(meta) {
if data, err = decryptBucketMetadata(cdata, bucket, meta, crypto.Context{bucket: bucket, bucketTargetsFile: bucketTargetsFile}); err != nil {
return nil, err
}
}
}
if err = json.Unmarshal(data, &t); err != nil {
return nil, err
}
return &t, nil
}