| // 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 streamingaead_test |
| |
| import ( |
| "bytes" |
| "fmt" |
| "testing" |
| |
| "github.com/golang/protobuf/proto" |
| "github.com/google/tink/go/core/registry" |
| "github.com/google/tink/go/streamingaead/subtle" |
| "github.com/google/tink/go/testutil" |
| ctrhmacpb "github.com/google/tink/go/proto/aes_ctr_hmac_streaming_go_proto" |
| commonpb "github.com/google/tink/go/proto/common_go_proto" |
| tinkpb "github.com/google/tink/go/proto/tink_go_proto" |
| ) |
| |
| var aesCTRHMACKeySizes = []uint32{16, 32} |
| |
| func TestAESCTRHMACGetPrimitiveBasic(t *testing.T) { |
| keyManager, err := registry.GetKeyManager(testutil.AESCTRHMACTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain AES-CTR-HMAC key manager: %s", err) |
| } |
| for _, keySize := range aesCTRHMACKeySizes { |
| key := testutil.NewAESCTRHMACKey(testutil.AESCTRHMACKeyVersion, keySize, commonpb.HashType_SHA256, keySize, commonpb.HashType_SHA256, 16, 4096) |
| serializedKey, err := proto.Marshal(key) |
| if err != nil { |
| t.Errorf("failed to marshal key: %s", err) |
| } |
| p, err := keyManager.Primitive(serializedKey) |
| if err != nil { |
| t.Errorf("unexpected error: %s", err) |
| } |
| if err := validateAESCTRHMACPrimitive(p, key); err != nil { |
| t.Errorf("%s", err) |
| } |
| } |
| } |
| |
| func TestAESCTRHMACGetPrimitiveWithInvalidInput(t *testing.T) { |
| keyManager, err := registry.GetKeyManager(testutil.AESCTRHMACTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain AES-CTR-HMAC key manager: %s", err) |
| } |
| |
| testKeys := genInvalidAESCTRHMACKeys() |
| for i := 0; i < len(testKeys); i++ { |
| serializedKey, err := proto.Marshal(testKeys[i]) |
| if err != nil { |
| t.Errorf("failed to marshal key: %s", err) |
| } |
| if _, err := keyManager.Primitive(serializedKey); err == nil { |
| t.Errorf("expect an error in test case %d", i) |
| } |
| } |
| |
| if _, err := keyManager.Primitive(nil); err == nil { |
| t.Errorf("expect an error when input is nil") |
| } |
| if _, err := keyManager.Primitive([]byte{}); err == nil { |
| t.Errorf("expect an error when input is empty") |
| } |
| } |
| |
| func TestAESCTRHMACNewKeyMultipleTimes(t *testing.T) { |
| keyManager, err := registry.GetKeyManager(testutil.AESCTRHMACTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain AES-CTR-HMAC key manager: %s", err) |
| } |
| format := testutil.NewAESCTRHMACKeyFormat(32, commonpb.HashType_SHA256, 32, commonpb.HashType_SHA256, 16, 4096) |
| serializedFormat, err := proto.Marshal(format) |
| if err != nil { |
| t.Errorf("failed to marshal key: %s", err) |
| } |
| keys := make(map[string]struct{}) |
| n := 26 |
| for i := 0; i < n; i++ { |
| key, _ := keyManager.NewKey(serializedFormat) |
| serializedKey, err := proto.Marshal(key) |
| if err != nil { |
| t.Errorf("failed to marshal key: %s", err) |
| } |
| keys[string(serializedKey)] = struct{}{} |
| |
| keyData, _ := keyManager.NewKeyData(serializedFormat) |
| serializedKey = keyData.Value |
| keys[string(serializedKey)] = struct{}{} |
| } |
| if len(keys) != n*2 { |
| t.Errorf("key is repeated") |
| } |
| } |
| |
| func TestAESCTRHMACNewKeyBasic(t *testing.T) { |
| keyManager, err := registry.GetKeyManager(testutil.AESCTRHMACTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain AES-CTR-HMAC key manager: %s", err) |
| } |
| for _, keySize := range aesCTRHMACKeySizes { |
| format := testutil.NewAESCTRHMACKeyFormat(keySize, commonpb.HashType_SHA256, keySize, commonpb.HashType_SHA256, 16, 4096) |
| serializedFormat, err := proto.Marshal(format) |
| if err != nil { |
| t.Errorf("failed to marshal key: %s", err) |
| } |
| m, err := keyManager.NewKey(serializedFormat) |
| if err != nil { |
| t.Errorf("unexpected error: %s", err) |
| } |
| key := m.(*ctrhmacpb.AesCtrHmacStreamingKey) |
| if err := validateAESCTRHMACKey(key, format); err != nil { |
| t.Errorf("%s", err) |
| } |
| } |
| } |
| |
| func TestAESCTRHMACNewKeyWithInvalidInput(t *testing.T) { |
| keyManager, err := registry.GetKeyManager(testutil.AESCTRHMACTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain AES-CTR-HMAC key manager: %s", err) |
| } |
| // bad format |
| badFormats := genInvalidAESCTRHMACKeyFormats() |
| for i := 0; i < len(badFormats); i++ { |
| serializedFormat, err := proto.Marshal(badFormats[i]) |
| if err != nil { |
| t.Errorf("failed to marshal key: %s", err) |
| } |
| if _, err := keyManager.NewKey(serializedFormat); err == nil { |
| t.Errorf("expect an error in test case %d", i) |
| } |
| } |
| // nil |
| if _, err := keyManager.NewKey(nil); err == nil { |
| t.Errorf("expect an error when input is nil") |
| } |
| // empty array |
| if _, err := keyManager.NewKey([]byte{}); err == nil { |
| t.Errorf("expect an error when input is empty") |
| } |
| } |
| |
| func TestAESCTRHMACNewKeyDataBasic(t *testing.T) { |
| keyManager, err := registry.GetKeyManager(testutil.AESCTRHMACTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain AES-CTR-HMAC key manager: %s", err) |
| } |
| for _, keySize := range aesCTRHMACKeySizes { |
| format := testutil.NewAESCTRHMACKeyFormat(keySize, commonpb.HashType_SHA256, keySize, commonpb.HashType_SHA256, 16, 4096) |
| serializedFormat, err := proto.Marshal(format) |
| if err != nil { |
| t.Errorf("failed to marshal key: %s", err) |
| } |
| keyData, err := keyManager.NewKeyData(serializedFormat) |
| if err != nil { |
| t.Errorf("unexpected error: %s", err) |
| } |
| if keyData.TypeUrl != testutil.AESCTRHMACTypeURL { |
| t.Errorf("incorrect type url") |
| } |
| if keyData.KeyMaterialType != tinkpb.KeyData_SYMMETRIC { |
| t.Errorf("incorrect key material type") |
| } |
| key := new(ctrhmacpb.AesCtrHmacStreamingKey) |
| if err := proto.Unmarshal(keyData.Value, key); err != nil { |
| t.Errorf("incorrect key value") |
| } |
| if err := validateAESCTRHMACKey(key, format); err != nil { |
| t.Errorf("%s", err) |
| } |
| } |
| } |
| |
| func TestAESCTRHMACNewKeyDataWithInvalidInput(t *testing.T) { |
| km, err := registry.GetKeyManager(testutil.AESCTRHMACTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain AES-CTR-HMAC key manager: %s", err) |
| } |
| badFormats := genInvalidAESCTRHMACKeyFormats() |
| for i := 0; i < len(badFormats); i++ { |
| serializedFormat, err := proto.Marshal(badFormats[i]) |
| if err != nil { |
| t.Errorf("failed to marshal key: %s", err) |
| } |
| if _, err := km.NewKeyData(serializedFormat); err == nil { |
| t.Errorf("expect an error in test case %d", i) |
| } |
| } |
| // nil input |
| if _, err := km.NewKeyData(nil); err == nil { |
| t.Errorf("expect an error when input is nil") |
| } |
| // empty input |
| if _, err := km.NewKeyData([]byte{}); err == nil { |
| t.Errorf("expect an error when input is empty") |
| } |
| } |
| |
| func TestAESCTRHMACDoesSupport(t *testing.T) { |
| keyManager, err := registry.GetKeyManager(testutil.AESCTRHMACTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain AES-CTR-HMAC key manager: %s", err) |
| } |
| if !keyManager.DoesSupport(testutil.AESCTRHMACTypeURL) { |
| t.Errorf("AESCTRHMACKeyManager must support %s", testutil.AESCTRHMACTypeURL) |
| } |
| if keyManager.DoesSupport("some bad type") { |
| t.Errorf("AESCTRHMACKeyManager must support only %s", testutil.AESCTRHMACTypeURL) |
| } |
| } |
| |
| func TestAESCTRHMACTypeURL(t *testing.T) { |
| keyManager, err := registry.GetKeyManager(testutil.AESCTRHMACTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain AES-CTR-HMAC key manager: %s", err) |
| } |
| if keyManager.TypeURL() != testutil.AESCTRHMACTypeURL { |
| t.Errorf("incorrect key type") |
| } |
| } |
| |
| func genInvalidAESCTRHMACKeys() []proto.Message { |
| return []proto.Message{ |
| // not a AESCTRHMACKey |
| testutil.NewAESCTRHMACKeyFormat(32, commonpb.HashType_SHA256, 32, commonpb.HashType_SHA256, 16, 4096), |
| |
| // bad key size |
| testutil.NewAESCTRHMACKey(testutil.AESGCMKeyVersion, 17, commonpb.HashType_SHA256, 16, commonpb.HashType_SHA256, 16, 4096), |
| testutil.NewAESCTRHMACKey(testutil.AESGCMKeyVersion, 16, commonpb.HashType_SHA256, 17, commonpb.HashType_SHA256, 16, 4096), |
| testutil.NewAESCTRHMACKey(testutil.AESGCMKeyVersion, 33, commonpb.HashType_SHA256, 33, commonpb.HashType_SHA256, 16, 4096), |
| |
| // bad version |
| testutil.NewAESCTRHMACKey(testutil.AESGCMKeyVersion+1, 16, commonpb.HashType_SHA256, 16, commonpb.HashType_SHA256, 16, 4096), |
| } |
| } |
| |
| func genInvalidAESCTRHMACKeyFormats() []proto.Message { |
| return []proto.Message{ |
| // not AESGCMKeyFormat |
| testutil.NewAESCTRHMACKey(testutil.AESGCMKeyVersion, 16, commonpb.HashType_SHA256, 16, commonpb.HashType_SHA256, 16, 4096), |
| |
| // invalid key size |
| testutil.NewAESCTRHMACKeyFormat(17, commonpb.HashType_SHA256, 16, commonpb.HashType_SHA256, 16, 4096), |
| testutil.NewAESCTRHMACKeyFormat(16, commonpb.HashType_SHA256, 17, commonpb.HashType_SHA256, 16, 4096), |
| testutil.NewAESCTRHMACKeyFormat(33, commonpb.HashType_SHA256, 33, commonpb.HashType_SHA256, 16, 4096), |
| } |
| } |
| |
| func validateAESCTRHMACKey(key *ctrhmacpb.AesCtrHmacStreamingKey, format *ctrhmacpb.AesCtrHmacStreamingKeyFormat) error { |
| if uint32(len(key.KeyValue)) != format.KeySize { |
| return fmt.Errorf("incorrect key size") |
| } |
| if key.Version != testutil.AESGCMKeyVersion { |
| return fmt.Errorf("incorrect key version") |
| } |
| if key.Params.CiphertextSegmentSize != format.Params.CiphertextSegmentSize { |
| return fmt.Errorf("incorrect ciphertext segment size") |
| } |
| if key.Params.DerivedKeySize != format.Params.DerivedKeySize { |
| return fmt.Errorf("incorrect derived key size") |
| } |
| if key.Params.HkdfHashType != format.Params.HkdfHashType { |
| return fmt.Errorf("incorrect HKDF hash type") |
| } |
| // try to encrypt and decrypt |
| p, err := subtle.NewAESCTRHMAC( |
| key.KeyValue, |
| key.Params.HkdfHashType.String(), |
| int(key.Params.DerivedKeySize), |
| key.Params.HmacParams.Hash.String(), |
| int(key.Params.HmacParams.TagSize), |
| int(key.Params.CiphertextSegmentSize), |
| 0, |
| ) |
| if err != nil { |
| return fmt.Errorf("invalid key") |
| } |
| return validateAESCTRHMACPrimitive(p, key) |
| } |
| |
| func validateAESCTRHMACPrimitive(p interface{}, key *ctrhmacpb.AesCtrHmacStreamingKey) error { |
| cipher := p.(*subtle.AESCTRHMAC) |
| if !bytes.Equal(cipher.MainKey, key.KeyValue) { |
| return fmt.Errorf("main key and primitive don't match") |
| } |
| return encryptDecrypt(cipher, cipher, 32, 32) |
| } |
