| // 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 signature_test |
| |
| import ( |
| "fmt" |
| "math/big" |
| "testing" |
| |
| "github.com/golang/protobuf/proto" |
| "github.com/google/tink/go/signature" |
| "github.com/google/tink/go/subtle/random" |
| subtleSig "github.com/google/tink/go/subtle/signature" |
| "github.com/google/tink/go/testutil" |
| commonpb "github.com/google/tink/proto/common_go_proto" |
| ecdsapb "github.com/google/tink/proto/ecdsa_go_proto" |
| tinkpb "github.com/google/tink/proto/tink_go_proto" |
| ) |
| |
| type ecdsaParams struct { |
| hashType commonpb.HashType |
| curve commonpb.EllipticCurveType |
| } |
| |
| func TestNewEcdsaSignKeyManager(t *testing.T) { |
| var km *signature.EcdsaSignKeyManager = signature.NewEcdsaSignKeyManager() |
| if km == nil { |
| t.Error("NewEcdsaSignKeyManager returns nil") |
| } |
| } |
| |
| func TestEcdsaSignGetPrimitiveBasic(t *testing.T) { |
| testParams := genValidEcdsaParams() |
| km := signature.NewEcdsaSignKeyManager() |
| for i := 0; i < len(testParams); i++ { |
| key := testutil.NewEcdsaPrivateKey(testParams[i].hashType, testParams[i].curve) |
| tmp, err := km.GetPrimitiveFromKey(key) |
| if err != nil { |
| t.Errorf("unexpect error in test case %d: %s ", i, err) |
| } |
| var _ *subtleSig.EcdsaSign = tmp.(*subtleSig.EcdsaSign) |
| |
| serializedKey, _ := proto.Marshal(key) |
| tmp, err = km.GetPrimitiveFromSerializedKey(serializedKey) |
| if err != nil { |
| t.Errorf("unexpect error in test case %d: %s ", i, err) |
| } |
| var _ *subtleSig.EcdsaSign = tmp.(*subtleSig.EcdsaSign) |
| } |
| } |
| |
| func TestEcdsaSignGetPrimitiveWithInvalidInput(t *testing.T) { |
| // invalid params |
| testParams := genInvalidEcdsaParams() |
| km := signature.NewEcdsaSignKeyManager() |
| for i := 0; i < len(testParams); i++ { |
| key := testutil.NewEcdsaPrivateKey(testParams[i].hashType, testParams[i].curve) |
| if _, err := km.GetPrimitiveFromKey(key); err == nil { |
| t.Errorf("expect an error in test case %d", i) |
| } |
| serializedKey, _ := proto.Marshal(key) |
| if _, err := km.GetPrimitiveFromSerializedKey(serializedKey); err == nil { |
| t.Errorf("expect an error in test case %d", i) |
| } |
| } |
| // invalid version |
| key := testutil.NewEcdsaPrivateKey(commonpb.HashType_SHA256, |
| commonpb.EllipticCurveType_NIST_P256) |
| key.Version = signature.EcdsaSignKeyVersion + 1 |
| if _, err := km.GetPrimitiveFromKey(key); err == nil { |
| t.Errorf("expect an error when version is invalid") |
| } |
| // nil input |
| if _, err := km.GetPrimitiveFromKey(nil); err == nil { |
| t.Errorf("expect an error when input is nil") |
| } |
| if _, err := km.GetPrimitiveFromSerializedKey(nil); err == nil { |
| t.Errorf("expect an error when input is nil") |
| } |
| if _, err := km.GetPrimitiveFromSerializedKey([]byte{}); err == nil { |
| t.Errorf("expect an error when input is empty slice") |
| } |
| } |
| |
| func TestEcdsaSignNewKeyBasic(t *testing.T) { |
| testParams := genValidEcdsaParams() |
| km := signature.NewEcdsaSignKeyManager() |
| for i := 0; i < len(testParams); i++ { |
| params := signature.NewEcdsaParams(testParams[i].hashType, testParams[i].curve, |
| ecdsapb.EcdsaSignatureEncoding_DER) |
| format := signature.NewEcdsaKeyFormat(params) |
| tmp, err := km.NewKeyFromKeyFormat(format) |
| if err != nil { |
| t.Errorf("unexpected error: %s", err) |
| } |
| var key *ecdsapb.EcdsaPrivateKey = tmp.(*ecdsapb.EcdsaPrivateKey) |
| if err := validateEcdsaPrivateKey(key, params); err != nil { |
| t.Errorf("invalid private key in test case %d: %s", i, err) |
| } |
| |
| serializedFormat, _ := proto.Marshal(format) |
| tmp, err = km.NewKeyFromSerializedKeyFormat(serializedFormat) |
| if err != nil { |
| t.Errorf("unexpected error: %s", err) |
| } |
| key = tmp.(*ecdsapb.EcdsaPrivateKey) |
| if err := validateEcdsaPrivateKey(key, params); err != nil { |
| t.Errorf("invalid private key in test case %d: %s", i, err) |
| } |
| } |
| } |
| |
| func TestEcdsaSignNewKeyWithInvalidInput(t *testing.T) { |
| km := signature.NewEcdsaSignKeyManager() |
| // invalid hash and curve type |
| testParams := genInvalidEcdsaParams() |
| for i := 0; i < len(testParams); i++ { |
| params := signature.NewEcdsaParams(testParams[i].hashType, testParams[i].curve, |
| ecdsapb.EcdsaSignatureEncoding_DER) |
| format := signature.NewEcdsaKeyFormat(params) |
| if _, err := km.NewKeyFromKeyFormat(format); err == nil { |
| t.Errorf("expect an error in test case %d", i) |
| } |
| serializedFormat, _ := proto.Marshal(format) |
| if _, err := km.NewKeyFromSerializedKeyFormat(serializedFormat); err == nil { |
| t.Errorf("expect an error in test case %d", i) |
| } |
| } |
| // invalid encoding |
| testParams = genValidEcdsaParams() |
| for i := 0; i < len(testParams); i++ { |
| params := signature.NewEcdsaParams(testParams[i].hashType, testParams[i].curve, |
| ecdsapb.EcdsaSignatureEncoding_UNKNOWN_ENCODING) |
| format := signature.NewEcdsaKeyFormat(params) |
| if _, err := km.NewKeyFromKeyFormat(format); err == nil { |
| t.Errorf("expect an error in test case %d", i) |
| } |
| serializedFormat, _ := proto.Marshal(format) |
| if _, err := km.NewKeyFromSerializedKeyFormat(serializedFormat); err == nil { |
| t.Errorf("expect an error in test case %d", i) |
| } |
| } |
| // nil input |
| if _, err := km.NewKeyFromKeyFormat(nil); err == nil { |
| t.Errorf("expect an error when input is nil") |
| } |
| if _, err := km.NewKeyFromSerializedKeyFormat(nil); err == nil { |
| t.Errorf("expect an error when input is nil") |
| } |
| if _, err := km.NewKeyFromSerializedKeyFormat([]byte{}); err == nil { |
| t.Errorf("expect an error when input is empty slice") |
| } |
| } |
| |
| func TestEcdsaSignNewKeyMultipleTimes(t *testing.T) { |
| km := signature.NewEcdsaSignKeyManager() |
| testParams := genValidEcdsaParams() |
| nTest := 27 |
| for i := 0; i < len(testParams); i++ { |
| keys := make(map[string]bool) |
| params := signature.NewEcdsaParams(testParams[i].hashType, testParams[i].curve, |
| ecdsapb.EcdsaSignatureEncoding_DER) |
| format := signature.NewEcdsaKeyFormat(params) |
| serializedFormat, _ := proto.Marshal(format) |
| for j := 0; j < nTest; j++ { |
| key, _ := km.NewKeyFromKeyFormat(format) |
| serializedKey, _ := proto.Marshal(key) |
| keys[string(serializedKey)] = true |
| |
| key, _ = km.NewKeyFromSerializedKeyFormat(serializedFormat) |
| serializedKey, _ = proto.Marshal(key) |
| keys[string(serializedKey)] = true |
| |
| keyData, _ := km.NewKeyData(serializedFormat) |
| serializedKey = keyData.Value |
| keys[string(serializedKey)] = true |
| } |
| if len(keys) != nTest*3 { |
| t.Errorf("key is repeated with params: %s", params) |
| } |
| } |
| } |
| |
| func TestEcdsaSignNewKeyDataBasic(t *testing.T) { |
| km := signature.NewEcdsaSignKeyManager() |
| testParams := genValidEcdsaParams() |
| for i := 0; i < len(testParams); i++ { |
| params := signature.NewEcdsaParams(testParams[i].hashType, testParams[i].curve, |
| ecdsapb.EcdsaSignatureEncoding_DER) |
| format := signature.NewEcdsaKeyFormat(params) |
| serializedFormat, _ := proto.Marshal(format) |
| |
| keyData, err := km.NewKeyData(serializedFormat) |
| if err != nil { |
| t.Errorf("unexpected error in test case %d: %s", i, err) |
| } |
| if keyData.TypeUrl != signature.EcdsaSignTypeURL { |
| t.Errorf("incorrect type url in test case %d: expect %s, got %s", |
| i, signature.EcdsaSignTypeURL, keyData.TypeUrl) |
| } |
| if keyData.KeyMaterialType != tinkpb.KeyData_ASYMMETRIC_PRIVATE { |
| t.Errorf("incorrect key material type in test case %d: expect %s, got %s", |
| i, tinkpb.KeyData_ASYMMETRIC_PRIVATE, keyData.KeyMaterialType) |
| } |
| key := new(ecdsapb.EcdsaPrivateKey) |
| if err := proto.Unmarshal(keyData.Value, key); err != nil { |
| t.Errorf("unexpect error in test case %d: %s", i, err) |
| } |
| if err := validateEcdsaPrivateKey(key, params); err != nil { |
| t.Errorf("invalid private key in test case %d: %s", i, err) |
| } |
| } |
| } |
| |
| func TestEcdsaSignNewKeyDataWithInvalidInput(t *testing.T) { |
| km := signature.NewEcdsaSignKeyManager() |
| testParams := genInvalidEcdsaParams() |
| for i := 0; i < len(testParams); i++ { |
| params := signature.NewEcdsaParams(testParams[i].hashType, testParams[i].curve, |
| ecdsapb.EcdsaSignatureEncoding_DER) |
| format := signature.NewEcdsaKeyFormat(params) |
| serializedFormat, _ := proto.Marshal(format) |
| |
| 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") |
| } |
| } |
| |
| func TestGetPublicKeyDataBasic(t *testing.T) { |
| testParams := genValidEcdsaParams() |
| km := signature.NewEcdsaSignKeyManager() |
| for i := 0; i < len(testParams); i++ { |
| key := testutil.NewEcdsaPrivateKey(testParams[i].hashType, testParams[i].curve) |
| serializedKey, _ := proto.Marshal(key) |
| |
| pubKeyData, err := km.GetPublicKeyData(serializedKey) |
| if err != nil { |
| t.Errorf("unexpect error in test case %d: %s ", i, err) |
| } |
| if pubKeyData.TypeUrl != signature.EcdsaVerifyTypeURL { |
| t.Errorf("incorrect type url: %s", pubKeyData.TypeUrl) |
| } |
| if pubKeyData.KeyMaterialType != tinkpb.KeyData_ASYMMETRIC_PUBLIC { |
| t.Errorf("incorrect key material type: %d", pubKeyData.KeyMaterialType) |
| } |
| pubKey := new(ecdsapb.EcdsaPublicKey) |
| if err = proto.Unmarshal(pubKeyData.Value, pubKey); err != nil { |
| t.Errorf("invalid public key: %s", err) |
| } |
| } |
| } |
| |
| func TestGetPublicKeyDataWithInvalidInput(t *testing.T) { |
| km := signature.NewEcdsaSignKeyManager() |
| // modified key |
| key := testutil.NewEcdsaPrivateKey(commonpb.HashType_SHA256, |
| commonpb.EllipticCurveType_NIST_P256) |
| serializedKey, _ := proto.Marshal(key) |
| serializedKey[0] = 0 |
| if _, err := km.GetPublicKeyData(serializedKey); err == nil { |
| t.Errorf("expect an error when input is a modified serialized key") |
| } |
| // nil |
| if _, err := km.GetPublicKeyData(nil); err == nil { |
| t.Errorf("expect an error when input is nil") |
| } |
| // empty slice |
| if _, err := km.GetPublicKeyData([]byte{}); err == nil { |
| t.Errorf("expect an error when input is an empty slice") |
| } |
| } |
| |
| var errSmallKey = fmt.Errorf("private key doesn't have adequate size") |
| |
| func validateEcdsaPrivateKey(key *ecdsapb.EcdsaPrivateKey, params *ecdsapb.EcdsaParams) error { |
| if key.Version != signature.EcdsaSignKeyVersion { |
| return fmt.Errorf("incorrect private key's version: expect %d, got %d", |
| signature.EcdsaSignKeyVersion, key.Version) |
| } |
| publicKey := key.PublicKey |
| if publicKey.Version != signature.EcdsaSignKeyVersion { |
| return fmt.Errorf("incorrect public key's version: expect %d, got %d", |
| signature.EcdsaSignKeyVersion, key.Version) |
| } |
| if params.HashType != publicKey.Params.HashType || |
| params.Curve != publicKey.Params.Curve || |
| params.Encoding != publicKey.Params.Encoding { |
| return fmt.Errorf("incorrect params: expect %s, got %s", params, publicKey.Params) |
| } |
| if len(publicKey.X) == 0 || len(publicKey.Y) == 0 { |
| return fmt.Errorf("public points are not initialized") |
| } |
| // check private key's size |
| d := new(big.Int).SetBytes(key.KeyValue) |
| keySize := len(d.Bytes()) |
| switch params.Curve { |
| case commonpb.EllipticCurveType_NIST_P256: |
| if keySize < 256/8-8 || keySize > 256/8+1 { |
| return errSmallKey |
| } |
| case commonpb.EllipticCurveType_NIST_P384: |
| if keySize < 384/8-8 || keySize > 384/8+1 { |
| return errSmallKey |
| } |
| case commonpb.EllipticCurveType_NIST_P521: |
| if keySize < 521/8-8 || keySize > 521/8+1 { |
| return errSmallKey |
| } |
| } |
| // try to sign and verify with the key |
| hash, curve, encoding := signature.GetEcdsaParamNames(publicKey.Params) |
| signer, err := subtleSig.NewEcdsaSign(hash, curve, encoding, key.KeyValue) |
| if err != nil { |
| return fmt.Errorf("unexpected error when creating EcdsaSign: %s", err) |
| } |
| verifier, err := subtleSig.NewEcdsaVerify(hash, curve, encoding, publicKey.X, publicKey.Y) |
| if err != nil { |
| return fmt.Errorf("unexpected error when creating EcdsaVerify: %s", err) |
| } |
| data := random.GetRandomBytes(1281) |
| signature, err := signer.Sign(data) |
| if err != nil { |
| return fmt.Errorf("unexpected error when signing: %s", err) |
| } |
| if err := verifier.Verify(signature, data); err != nil { |
| return fmt.Errorf("unexpected error when verifying signature: %s", err) |
| } |
| return nil |
| } |
| |
| func genValidEcdsaParams() []ecdsaParams { |
| return []ecdsaParams{ |
| ecdsaParams{ |
| hashType: commonpb.HashType_SHA256, |
| curve: commonpb.EllipticCurveType_NIST_P256, |
| }, |
| ecdsaParams{ |
| hashType: commonpb.HashType_SHA512, |
| curve: commonpb.EllipticCurveType_NIST_P384, |
| }, |
| ecdsaParams{ |
| hashType: commonpb.HashType_SHA512, |
| curve: commonpb.EllipticCurveType_NIST_P521, |
| }, |
| } |
| } |
| |
| func genInvalidEcdsaParams() []ecdsaParams { |
| return []ecdsaParams{ |
| ecdsaParams{ |
| hashType: commonpb.HashType_SHA1, |
| curve: commonpb.EllipticCurveType_NIST_P256, |
| }, |
| ecdsaParams{ |
| hashType: commonpb.HashType_SHA1, |
| curve: commonpb.EllipticCurveType_NIST_P384, |
| }, |
| ecdsaParams{ |
| hashType: commonpb.HashType_SHA1, |
| curve: commonpb.EllipticCurveType_NIST_P521, |
| }, |
| ecdsaParams{ |
| hashType: commonpb.HashType_SHA256, |
| curve: commonpb.EllipticCurveType_NIST_P384, |
| }, |
| ecdsaParams{ |
| hashType: commonpb.HashType_SHA256, |
| curve: commonpb.EllipticCurveType_NIST_P521, |
| }, |
| ecdsaParams{ |
| hashType: commonpb.HashType_SHA512, |
| curve: commonpb.EllipticCurveType_NIST_P256, |
| }, |
| } |
| } |
