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Optimize decryptObjectInfo (#10726)

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`decryptObjectInfo` is a significant bottleneck when listing objects.

Reduce the allocations for a significant speedup.

https://github.com/minio/sio/pull/40

```
λ benchcmp before.txt after.txt
benchmark                          old ns/op     new ns/op     delta
Benchmark_decryptObjectInfo-32     24260928      808656        -96.67%

benchmark                          old MB/s     new MB/s     speedup
Benchmark_decryptObjectInfo-32     0.04         1.24         31.00x

benchmark                          old allocs     new allocs     delta
Benchmark_decryptObjectInfo-32     75112          48996          -34.77%

benchmark                          old bytes     new bytes     delta
Benchmark_decryptObjectInfo-32     287694772     4228076       -98.53%
```
This commit is contained in:
Klaus Post 2020-10-29 09:34:20 -07:00 committed by GitHub
parent 4bf90ca67f
commit 6b14c4ab1e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 195 additions and 35 deletions
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10
cmd/crypto/kes.go
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@ -177,11 +177,10 @@ func (kes *kesService) CreateKey(keyID string) error { return kes.client.CreateK
// named key referenced by keyID. It also binds the generated key
// cryptographically to the provided context.
func (kes *kesService) GenerateKey(keyID string, ctx Context) (key [32]byte, sealedKey []byte, err error) {
var context bytes.Buffer
ctx.WriteTo(&context)
context := ctx.AppendTo(make([]byte, 0, 128))
var plainKey []byte
plainKey, sealedKey, err = kes.client.GenerateDataKey(keyID, context.Bytes())
plainKey, sealedKey, err = kes.client.GenerateDataKey(keyID, context)
if err != nil {
return key, nil, err
}
@ -200,11 +199,10 @@ func (kes *kesService) GenerateKey(keyID string, ctx Context) (key [32]byte, sea
// The context must be same context as the one provided while
// generating the plaintext key / sealedKey.
func (kes *kesService) UnsealKey(keyID string, sealedKey []byte, ctx Context) (key [32]byte, err error) {
var context bytes.Buffer
ctx.WriteTo(&context)
context := ctx.AppendTo(make([]byte, 0, 128))
var plainKey []byte
plainKey, err = kes.client.DecryptDataKey(keyID, sealedKey, context.Bytes())
plainKey, err = kes.client.DecryptDataKey(keyID, sealedKey, context)
if err != nil {
return key, err
}

10
cmd/crypto/key.go
View File

@ -103,7 +103,6 @@ func (key ObjectKey) Seal(extKey, iv [32]byte, domain, bucket, object string) Se
func (key *ObjectKey) Unseal(extKey [32]byte, sealedKey SealedKey, domain, bucket, object string) error {
var (
unsealConfig sio.Config
decryptedKey bytes.Buffer
)
switch sealedKey.Algorithm {
default:
@ -122,10 +121,9 @@ func (key *ObjectKey) Unseal(extKey [32]byte, sealedKey SealedKey, domain, bucke
unsealConfig = sio.Config{MinVersion: sio.Version10, Key: sha.Sum(nil)}
}
if n, err := sio.Decrypt(&decryptedKey, bytes.NewReader(sealedKey.Key[:]), unsealConfig); n != 32 || err != nil {
if out, err := sio.DecryptBuffer(key[:0], sealedKey.Key[:], unsealConfig); len(out) != 32 || err != nil {
return ErrSecretKeyMismatch
}
copy(key[:], decryptedKey.Bytes())
return nil
}
@ -165,11 +163,7 @@ func (key ObjectKey) UnsealETag(etag []byte) ([]byte, error) {
if !IsETagSealed(etag) {
return etag, nil
}
var buffer bytes.Buffer
mac := hmac.New(sha256.New, key[:])
mac.Write([]byte("SSE-etag"))
if _, err := sio.Decrypt(&buffer, bytes.NewReader(etag), sio.Config{Key: mac.Sum(nil)}); err != nil {
return nil, err
}
return buffer.Bytes(), nil
return sio.DecryptBuffer(make([]byte, 0, len(etag)), etag, sio.Config{Key: mac.Sum(nil)})
}

56
cmd/crypto/kms.go
View File

@ -39,6 +39,8 @@ type Context map[string]string
//
// WriteTo sorts the context keys and writes the sorted
// key-value pairs as canonical JSON object to w.
//
// Note that neither keys nor values are escaped for JSON.
func (c Context) WriteTo(w io.Writer) (n int64, err error) {
sortedKeys := make(sort.StringSlice, 0, len(c))
for k := range c {
@ -67,6 +69,53 @@ func (c Context) WriteTo(w io.Writer) (n int64, err error) {
return n + int64(nn), err
}
// AppendTo appends the context in a canonical from to dst.
//
// AppendTo sorts the context keys and writes the sorted
// key-value pairs as canonical JSON object to w.
//
// Note that neither keys nor values are escaped for JSON.
func (c Context) AppendTo(dst []byte) (output []byte) {
if len(c) == 0 {
return append(dst, '{', '}')
}
// out should not escape.
out := bytes.NewBuffer(dst)
// No need to copy+sort
if len(c) == 1 {
for k, v := range c {
out.WriteString(`{"`)
out.WriteString(k)
out.WriteString(`":"`)
out.WriteString(v)
out.WriteString(`"}`)
}
return out.Bytes()
}
sortedKeys := make([]string, 0, len(c))
for k := range c {
sortedKeys = append(sortedKeys, k)
}
sort.Strings(sortedKeys)
out.WriteByte('{')
for i, k := range sortedKeys {
out.WriteByte('"')
out.WriteString(k)
out.WriteString(`":"`)
out.WriteString(c[k])
out.WriteByte('"')
if i < len(sortedKeys)-1 {
out.WriteByte(',')
}
}
out.WriteByte('}')
return out.Bytes()
}
// KMS represents an active and authenticted connection
// to a Key-Management-Service. It supports generating
// data key generation and unsealing of KMS-generated
@ -155,13 +204,12 @@ func (kms *masterKeyKMS) Info() (info KMSInfo) {
func (kms *masterKeyKMS) UnsealKey(keyID string, sealedKey []byte, ctx Context) (key [32]byte, err error) {
var (
buffer bytes.Buffer
derivedKey = kms.deriveKey(keyID, ctx)
)
if n, err := sio.Decrypt(&buffer, bytes.NewReader(sealedKey), sio.Config{Key: derivedKey[:]}); err != nil || n != 32 {
out, err := sio.DecryptBuffer(key[:0], sealedKey, sio.Config{Key: derivedKey[:]})
if err != nil || len(out) != 32 {
return key, err // TODO(aead): upgrade sio to use sio.Error
}
copy(key[:], buffer.Bytes())
return key, nil
}
@ -171,7 +219,7 @@ func (kms *masterKeyKMS) deriveKey(keyID string, context Context) (key [32]byte)
}
mac := hmac.New(sha256.New, kms.masterKey[:])
mac.Write([]byte(keyID))
context.WriteTo(mac)
mac.Write(context.AppendTo(make([]byte, 0, 128)))
mac.Sum(key[:0])
return key
}

30
cmd/crypto/kms_test.go
View File

@ -16,6 +16,7 @@ package crypto
import (
"bytes"
"fmt"
"path"
"strings"
"testing"
@ -83,3 +84,32 @@ func TestContextWriteTo(t *testing.T) {
}
}
}
func TestContextAppendTo(t *testing.T) {
for i, test := range contextWriteToTests {
dst := make([]byte, 0, 1024)
dst = test.Context.AppendTo(dst)
if s := string(dst); s != test.ExpectedJSON {
t.Errorf("Test %d: JSON representation differ - got: '%s' want: '%s'", i, s, test.ExpectedJSON)
}
// Append one more
dst = test.Context.AppendTo(dst)
if s := string(dst); s != test.ExpectedJSON+test.ExpectedJSON {
t.Errorf("Test %d: JSON representation differ - got: '%s' want: '%s'", i, s, test.ExpectedJSON+test.ExpectedJSON)
}
}
}
func BenchmarkContext_AppendTo(b *testing.B) {
tests := []Context{{}, {"bucket": "warp-benchmark-bucket"}, {"0": "1", "-": "2", ".": "#"}, {"34trg": "dfioutr89", "ikjfdghkjf": "jkedfhgfjkhg", "sdfhsdjkh": "if88889", "asddsirfh804": "kjfdshgdfuhgfg78-45604586#$%"}}
for _, test := range tests {
b.Run(fmt.Sprintf("%d-elems", len(test)), func(b *testing.B) {
dst := make([]byte, 0, 1024)
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
dst = test.AppendTo(dst[:0])
}
})
}
}

14
cmd/crypto/metadata.go
View File

@ -204,15 +204,17 @@ func (s3) ParseMetadata(metadata map[string]string) (keyID string, kmsKey []byte
}
// Check whether all extracted values are well-formed
iv, err := base64.StdEncoding.DecodeString(b64IV)
if err != nil || len(iv) != 32 {
var iv [32]byte
n, err := base64.StdEncoding.Decode(iv[:], []byte(b64IV))
if err != nil || n != 32 {
return keyID, kmsKey, sealedKey, errInvalidInternalIV
}
if algorithm != SealAlgorithm {
return keyID, kmsKey, sealedKey, errInvalidInternalSealAlgorithm
}
encryptedKey, err := base64.StdEncoding.DecodeString(b64SealedKey)
if err != nil || len(encryptedKey) != 64 {
var encryptedKey [64]byte
n, err = base64.StdEncoding.Decode(encryptedKey[:], []byte(b64SealedKey))
if err != nil || n != 64 {
return keyID, kmsKey, sealedKey, Errorf("The internal sealed key for SSE-S3 is invalid")
}
if idPresent && kmsKeyPresent { // We are using a KMS -> parse the sealed KMS data key.
@ -223,8 +225,8 @@ func (s3) ParseMetadata(metadata map[string]string) (keyID string, kmsKey []byte
}
sealedKey.Algorithm = algorithm
copy(sealedKey.IV[:], iv)
copy(sealedKey.Key[:], encryptedKey)
sealedKey.IV = iv
sealedKey.Key = encryptedKey
return keyID, kmsKey, sealedKey, nil
}

16
cmd/crypto/vault.go
View File

@ -15,7 +15,6 @@
package crypto
import (
"bytes"
"encoding/base64"
"errors"
"fmt"
@ -224,11 +223,10 @@ func (v *vaultService) CreateKey(keyID string) error {
// named key referenced by keyID. It also binds the generated key
// cryptographically to the provided context.
func (v *vaultService) GenerateKey(keyID string, ctx Context) (key [32]byte, sealedKey []byte, err error) {
var contextStream bytes.Buffer
ctx.WriteTo(&contextStream)
context := ctx.AppendTo(make([]byte, 0, 128))
payload := map[string]interface{}{
"context": base64.StdEncoding.EncodeToString(contextStream.Bytes()),
"context": base64.StdEncoding.EncodeToString(context),
}
s, err := v.client.Logical().Write(fmt.Sprintf("/transit/datakey/plaintext/%s", keyID), payload)
if err != nil {
@ -260,12 +258,11 @@ func (v *vaultService) GenerateKey(keyID string, ctx Context) (key [32]byte, sea
// The context must be same context as the one provided while
// generating the plaintext key / sealedKey.
func (v *vaultService) UnsealKey(keyID string, sealedKey []byte, ctx Context) (key [32]byte, err error) {
var contextStream bytes.Buffer
ctx.WriteTo(&contextStream)
context := ctx.AppendTo(make([]byte, 0, 128))
payload := map[string]interface{}{
"ciphertext": string(sealedKey),
"context": base64.StdEncoding.EncodeToString(contextStream.Bytes()),
"context": base64.StdEncoding.EncodeToString(context),
}
s, err := v.client.Logical().Write(fmt.Sprintf("/transit/decrypt/%s", keyID), payload)
@ -294,12 +291,11 @@ func (v *vaultService) UnsealKey(keyID string, sealedKey []byte, ctx Context) (k
// The context must be same context as the one provided while
// generating the plaintext key / sealedKey.
func (v *vaultService) UpdateKey(keyID string, sealedKey []byte, ctx Context) (rotatedKey []byte, err error) {
var contextStream bytes.Buffer
ctx.WriteTo(&contextStream)
context := ctx.AppendTo(make([]byte, 0, 128))
payload := map[string]interface{}{
"ciphertext": string(sealedKey),
"context": base64.StdEncoding.EncodeToString(contextStream.Bytes()),
"context": base64.StdEncoding.EncodeToString(context),
}
s, err := v.client.Logical().Write(fmt.Sprintf("/transit/rewrap/%s", keyID), payload)
if err != nil {

90
cmd/encryption-v1_test.go
View File

@ -19,10 +19,14 @@ package cmd
import (
"bytes"
"encoding/base64"
"encoding/json"
"fmt"
"net/http"
"os"
"testing"
humanize "github.com/dustin/go-humanize"
"github.com/klauspost/compress/zstd"
"github.com/minio/minio-go/v7/pkg/encrypt"
"github.com/minio/minio/cmd/crypto"
"github.com/minio/sio"
@ -622,3 +626,89 @@ func TestGetDefaultOpts(t *testing.T) {
}
}
}
func Test_decryptObjectInfo(t *testing.T) {
var testSet []struct {
Bucket string
Name string
UserDef map[string]string
}
file, err := os.Open("testdata/decryptObjectInfo.json.zst")
if err != nil {
t.Fatal(err)
}
defer file.Close()
dec, err := zstd.NewReader(file)
if err != nil {
t.Fatal(err)
}
defer dec.Close()
js := json.NewDecoder(dec)
err = js.Decode(&testSet)
if err != nil {
t.Fatal(err)
}
os.Setenv("MINIO_KMS_MASTER_KEY", "my-minio-key:6368616e676520746869732070617373776f726420746f206120736563726574")
defer os.Setenv("MINIO_KMS_MASTER_KEY", "")
GlobalKMS, err = crypto.NewKMS(crypto.KMSConfig{})
if err != nil {
t.Fatal(err)
}
var dst [32]byte
for i := range testSet {
t.Run(fmt.Sprint("case-", i), func(t *testing.T) {
test := &testSet[i]
_, err := decryptObjectInfo(dst[:], test.Bucket, test.Name, test.UserDef)
if err != nil {
t.Fatal(err)
}
})
}
}
func Benchmark_decryptObjectInfo(b *testing.B) {
var testSet []struct {
Bucket string
Name string
UserDef map[string]string
}
file, err := os.Open("testdata/decryptObjectInfo.json.zst")
if err != nil {
b.Fatal(err)
}
defer file.Close()
dec, err := zstd.NewReader(file)
if err != nil {
b.Fatal(err)
}
defer dec.Close()
js := json.NewDecoder(dec)
err = js.Decode(&testSet)
if err != nil {
b.Fatal(err)
}
os.Setenv("MINIO_KMS_MASTER_KEY", "my-minio-key:6368616e676520746869732070617373776f726420746f206120736563726574")
defer os.Setenv("MINIO_KMS_MASTER_KEY", "")
GlobalKMS, err = crypto.NewKMS(crypto.KMSConfig{})
if err != nil {
b.Fatal(err)
}
b.ReportAllocs()
b.ResetTimer()
b.SetBytes(int64(len(testSet)))
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
var dst [32]byte
for i := range testSet {
test := &testSet[i]
_, err := decryptObjectInfo(dst[:], test.Bucket, test.Name, test.UserDef)
if err != nil {
b.Fatal(err)
}
}
}
})
}

BIN
cmd/testdata/decryptObjectInfo.json.zst vendored Normal file
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Binary file not shown.

2
go.mod
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@ -52,7 +52,7 @@ require (
github.com/minio/selfupdate v0.3.1
github.com/minio/sha256-simd v0.1.1
github.com/minio/simdjson-go v0.1.5
github.com/minio/sio v0.2.0
github.com/minio/sio v0.2.1
github.com/mitchellh/go-homedir v1.1.0
github.com/mmcloughlin/avo v0.0.0-20200803215136-443f81d77104 // indirect
github.com/montanaflynn/stats v0.5.0

2
go.sum
View File

@ -318,6 +318,8 @@ github.com/minio/simdjson-go v0.1.5 h1:6T5mHh7r3kUvgwhmFWQAjoPV5Yt5oD/VPjAI9ViH1
github.com/minio/simdjson-go v0.1.5/go.mod h1:oKURrZZEBtqObgJrSjN1Ln2n9MJj2icuBTkeJzZnvSI=
github.com/minio/sio v0.2.0 h1:NCRCFLx0r5pRbXf65LVNjxbCGZgNQvNFQkgX3XF4BoA=
github.com/minio/sio v0.2.0/go.mod h1:nKM5GIWSrqbOZp0uhyj6M1iA0X6xQzSGtYSaTKSCut0=
github.com/minio/sio v0.2.1 h1:NjzKiIMSMcHediVQR0AFVx2tp7Wxh9tKPfDI3kH7aHQ=
github.com/minio/sio v0.2.1/go.mod h1:8b0yPp2avGThviy/+OCJBI6OMpvxoUuiLvE6F1lebhw=
github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
github.com/mitchellh/copystructure v1.0.0/go.mod h1:SNtv71yrdKgLRyLFxmLdkAbkKEFWgYaq1OVrnRcwhnw=
github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=