| // Copyright 2022 Google LLC |
| // |
| // 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 ( |
| "math/big" |
| "testing" |
| |
| "github.com/google/go-cmp/cmp" |
| "google.golang.org/protobuf/proto" |
| "google.golang.org/protobuf/testing/protocmp" |
| "github.com/google/tink/go/core/registry" |
| "github.com/google/tink/go/signature/internal" |
| "github.com/google/tink/go/subtle/random" |
| cpb "github.com/google/tink/go/proto/common_go_proto" |
| rsassapkcs1pb "github.com/google/tink/go/proto/rsa_ssa_pkcs1_go_proto" |
| tinkpb "github.com/google/tink/go/proto/tink_go_proto" |
| ) |
| |
| const ( |
| rsaPKCS1PrivateKeyTypeURL = "type.googleapis.com/google.crypto.tink.RsaSsaPkcs1PrivateKey" |
| ) |
| |
| func TestRSASSAPKCS1SignerKeyManagerDoesSupport(t *testing.T) { |
| skm, err := registry.GetKeyManager(rsaPKCS1PrivateKeyTypeURL) |
| if err != nil { |
| t.Fatalf("registry.GetKeyManager(%q) err = %v, want nil", rsaPKCS1PrivateKeyTypeURL, err) |
| } |
| if !skm.DoesSupport(rsaPKCS1PrivateKeyTypeURL) { |
| t.Errorf("DoesSupport(%q) = false, want true", rsaPKCS1PrivateKeyTypeURL) |
| } |
| if skm.DoesSupport("not.valid.type") { |
| t.Errorf("DoesSupport(%q) = true, want false", "not.valid.type") |
| } |
| } |
| |
| func TestRSASSAPKCS1SignerTypeURL(t *testing.T) { |
| skm, err := registry.GetKeyManager(rsaPKCS1PrivateKeyTypeURL) |
| if err != nil { |
| t.Fatalf("registry.GetKeyManager(%q) err = %v, want nil", rsaPKCS1PrivateKeyTypeURL, err) |
| } |
| if skm.TypeURL() != rsaPKCS1PrivateKeyTypeURL { |
| t.Errorf("TypeURL() = %q, want %q", skm.TypeURL(), rsaPKCS1PrivateKeyTypeURL) |
| } |
| } |
| |
| func TestRSASSAPKCS1SignerKeyManagerPublicData(t *testing.T) { |
| skm, err := registry.GetKeyManager(rsaPKCS1PrivateKeyTypeURL) |
| if err != nil { |
| t.Fatalf("registry.GetKeyManager(%q) err = %v, want nil", rsaPKCS1PrivateKeyTypeURL, err) |
| } |
| privKey, err := makeValidRSAPKCS1Key() |
| if err != nil { |
| t.Fatalf("makeValidRSAPKCS1Key() err = %v, want nil", err) |
| } |
| serializedPrivate, err := proto.Marshal(privKey) |
| if err != nil { |
| t.Fatalf("proto.Marshal() err = %v, want nil", err) |
| } |
| serializedPublic, err := proto.Marshal(privKey.PublicKey) |
| if err != nil { |
| t.Fatalf("proto.Marshal() err = %v, want nil", err) |
| } |
| got, err := skm.(registry.PrivateKeyManager).PublicKeyData(serializedPrivate) |
| if err != nil { |
| t.Fatalf("PublicKeyData() err = %v, want nil", err) |
| } |
| want := &tinkpb.KeyData{ |
| TypeUrl: rsaPKCS1PublicTypeURL, |
| KeyMaterialType: tinkpb.KeyData_ASYMMETRIC_PUBLIC, |
| Value: serializedPublic, |
| } |
| if !cmp.Equal(got, want, protocmp.Transform()) { |
| t.Errorf("got = %v, want = %v, with diff: %v", got, want, cmp.Diff(got, want, protocmp.Transform())) |
| } |
| } |
| |
| func TestRSASSAPKCS1SignerKeyManagerPublicDataFailsWithInvalidInput(t *testing.T) { |
| type testCase struct { |
| name string |
| pubKey *rsassapkcs1pb.RsaSsaPkcs1PublicKey |
| } |
| validPrivKey, err := makeValidRSAPKCS1Key() |
| if err != nil { |
| t.Fatalf("makeValidRSAPKCS1Key() err = %v, want nil", err) |
| } |
| skm, err := registry.GetKeyManager(rsaPKCS1PrivateKeyTypeURL) |
| if err != nil { |
| t.Fatalf("registry.GetKeyManager(%q) err = %v, want nil", rsaPKCS1PrivateKeyTypeURL, err) |
| } |
| for _, tc := range []testCase{ |
| { |
| name: "nil public key", |
| pubKey: nil, |
| }, |
| { |
| name: "invalid hash function", |
| pubKey: &rsassapkcs1pb.RsaSsaPkcs1PublicKey{ |
| Version: validPrivKey.GetVersion(), |
| Params: &rsassapkcs1pb.RsaSsaPkcs1Params{ |
| HashType: cpb.HashType_SHA1, |
| }, |
| N: validPrivKey.GetPublicKey().GetN(), |
| E: validPrivKey.GetPublicKey().GetE(), |
| }, |
| }, |
| { |
| name: "invalid exponent", |
| pubKey: &rsassapkcs1pb.RsaSsaPkcs1PublicKey{ |
| Version: validPrivKey.GetVersion(), |
| Params: validPrivKey.GetPublicKey().GetParams(), |
| N: validPrivKey.GetPublicKey().GetN(), |
| E: []byte{0x08}, |
| }, |
| }, |
| { |
| name: "invalid modulus", |
| pubKey: &rsassapkcs1pb.RsaSsaPkcs1PublicKey{ |
| Version: validPrivKey.GetVersion(), |
| Params: validPrivKey.GetPublicKey().GetParams(), |
| N: []byte{0x00, 0x00, 0x00}, |
| E: validPrivKey.GetPublicKey().GetE(), |
| }, |
| }, |
| { |
| name: "invalid version", |
| pubKey: &rsassapkcs1pb.RsaSsaPkcs1PublicKey{ |
| Version: validPrivKey.GetVersion() + 1, |
| Params: validPrivKey.GetPublicKey().GetParams(), |
| N: validPrivKey.GetPublicKey().GetN(), |
| E: validPrivKey.GetPublicKey().GetE(), |
| }, |
| }, |
| } { |
| t.Run(tc.name, func(t *testing.T) { |
| InvalidPub := validPrivKey |
| InvalidPub.PublicKey = tc.pubKey |
| serializedPrivateKey, err := proto.Marshal(InvalidPub) |
| if err != nil { |
| t.Fatalf("proto.Marshal() err= %v, want nil", err) |
| } |
| if _, err := skm.(registry.PrivateKeyManager).PublicKeyData(serializedPrivateKey); err == nil { |
| t.Fatalf("PublicKeyData() err = nil, want error") |
| } |
| }) |
| } |
| } |
| |
| func TestRSASSAPKCS1SignerKeyManagerPrimitiveSignVerify(t *testing.T) { |
| skm, err := registry.GetKeyManager(rsaPKCS1PrivateKeyTypeURL) |
| if err != nil { |
| t.Fatalf("registry.GetKeyManager(%q) err = %v, want nil", rsaPKCS1PrivateKeyTypeURL, err) |
| } |
| privKey, err := makeValidRSAPKCS1Key() |
| if err != nil { |
| t.Fatalf("makeValidRSAPKCS1Key() err = %v, want nil", err) |
| } |
| serializedPrivate, err := proto.Marshal(privKey) |
| if err != nil { |
| t.Fatalf("proto.Marshal() err = %v, want nil", err) |
| } |
| p, err := skm.Primitive(serializedPrivate) |
| if err != nil { |
| t.Fatalf("Primitive() err = %v, want nil", err) |
| } |
| signer, ok := p.(*internal.RSA_SSA_PKCS1_Signer) |
| if !ok { |
| t.Fatalf("primitive is not of type RSA_SSA_PKCS1_Signer") |
| } |
| vkm, err := registry.GetKeyManager(rsaPKCS1PublicTypeURL) |
| if err != nil { |
| t.Fatalf("regitry.GetKeyManager(%q) err = %v, want nil", rsaPKCS1PublicTypeURL, err) |
| } |
| serializedPublic, err := proto.Marshal(privKey.PublicKey) |
| if err != nil { |
| t.Fatalf("Failed serializing public key proto: %v", err) |
| } |
| p, err = vkm.Primitive(serializedPublic) |
| if err != nil { |
| t.Fatalf("rsaSSAPKCS1VerifierKeyManager.Primitive() failed: %v", err) |
| } |
| v, ok := p.(*internal.RSA_SSA_PKCS1_Verifier) |
| if !ok { |
| t.Fatalf("primitve is not of type RSA_SSA_PKCS1_Verifier") |
| } |
| data := random.GetRandomBytes(1281) |
| signature, err := signer.Sign(data) |
| if err != nil { |
| t.Fatalf("Sign() err = %v, want nil", err) |
| } |
| if err := v.Verify(signature, data); err != nil { |
| t.Fatalf("Verify() err = %v, want nil", err) |
| } |
| } |
| |
| func TestRSASSAPKCS1SignerKeyManagerPrimitiveWithInvalidInputFails(t *testing.T) { |
| km, err := registry.GetKeyManager(rsaPKCS1PrivateKeyTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain RSASSAPKCS1Signer key manager: %s", err) |
| } |
| validPrivKey, err := makeValidRSAPKCS1Key() |
| if err != nil { |
| t.Fatalf("makeValidRSAPKCS1Key() err = %v, want nil", err) |
| } |
| type testCase struct { |
| name string |
| key *rsassapkcs1pb.RsaSsaPkcs1PrivateKey |
| } |
| for _, tc := range []testCase{ |
| { |
| name: "empty key", |
| key: &rsassapkcs1pb.RsaSsaPkcs1PrivateKey{}, |
| }, |
| { |
| name: "nil key", |
| key: nil, |
| }, |
| { |
| name: "invalid version", |
| key: &rsassapkcs1pb.RsaSsaPkcs1PrivateKey{ |
| Version: validPrivKey.GetVersion() + 1, |
| PublicKey: validPrivKey.GetPublicKey(), |
| D: validPrivKey.GetD(), |
| P: validPrivKey.GetP(), |
| Q: validPrivKey.GetQ(), |
| Dp: validPrivKey.GetDp(), |
| Dq: validPrivKey.GetDq(), |
| Crt: validPrivKey.GetCrt(), |
| }, |
| }, |
| { |
| name: "invalid hash algorithm ", |
| key: &rsassapkcs1pb.RsaSsaPkcs1PrivateKey{ |
| Version: validPrivKey.Version, |
| PublicKey: &rsassapkcs1pb.RsaSsaPkcs1PublicKey{ |
| Version: validPrivKey.GetPublicKey().GetVersion(), |
| E: validPrivKey.GetPublicKey().GetE(), |
| N: validPrivKey.GetPublicKey().GetN(), |
| Params: &rsassapkcs1pb.RsaSsaPkcs1Params{ |
| HashType: cpb.HashType_SHA224, |
| }, |
| }, |
| D: validPrivKey.GetD(), |
| P: validPrivKey.GetP(), |
| Q: validPrivKey.GetQ(), |
| Dp: validPrivKey.GetDp(), |
| Dq: validPrivKey.GetDq(), |
| Crt: validPrivKey.GetCrt(), |
| }, |
| }, |
| { |
| name: "invalid modulus", |
| key: &rsassapkcs1pb.RsaSsaPkcs1PrivateKey{ |
| Version: validPrivKey.Version, |
| PublicKey: &rsassapkcs1pb.RsaSsaPkcs1PublicKey{ |
| Version: validPrivKey.GetPublicKey().GetVersion(), |
| E: validPrivKey.GetPublicKey().GetE(), |
| N: []byte{3, 4, 5}, |
| Params: validPrivKey.GetPublicKey().GetParams(), |
| }, |
| D: validPrivKey.GetD(), |
| P: validPrivKey.GetP(), |
| Q: validPrivKey.GetQ(), |
| Dp: validPrivKey.GetDp(), |
| Dq: validPrivKey.GetDq(), |
| Crt: validPrivKey.GetCrt(), |
| }, |
| }, |
| { |
| name: "invalid public key exponent", |
| key: &rsassapkcs1pb.RsaSsaPkcs1PrivateKey{ |
| Version: validPrivKey.Version, |
| PublicKey: &rsassapkcs1pb.RsaSsaPkcs1PublicKey{ |
| Version: validPrivKey.GetPublicKey().GetVersion(), |
| E: []byte{0x06}, |
| N: validPrivKey.GetPublicKey().GetN(), |
| Params: validPrivKey.GetPublicKey().GetParams(), |
| }, |
| D: validPrivKey.GetD(), |
| P: validPrivKey.GetP(), |
| Q: validPrivKey.GetQ(), |
| Dp: validPrivKey.GetDp(), |
| Dq: validPrivKey.GetDq(), |
| Crt: validPrivKey.GetCrt(), |
| }, |
| }, |
| { |
| name: "invalid private key", |
| key: &rsassapkcs1pb.RsaSsaPkcs1PrivateKey{ |
| Version: validPrivKey.Version, |
| PublicKey: &rsassapkcs1pb.RsaSsaPkcs1PublicKey{ |
| Version: validPrivKey.GetPublicKey().GetVersion(), |
| E: validPrivKey.GetPublicKey().GetE(), |
| N: validPrivKey.GetPublicKey().GetN(), |
| Params: validPrivKey.GetPublicKey().GetParams(), |
| }, |
| D: nil, |
| P: nil, |
| Q: nil, |
| Dp: validPrivKey.GetDp(), |
| Dq: validPrivKey.GetDq(), |
| Crt: validPrivKey.GetCrt(), |
| }, |
| }, |
| { |
| name: "invalid precomputed values in private key", |
| key: &rsassapkcs1pb.RsaSsaPkcs1PrivateKey{ |
| Version: validPrivKey.Version, |
| PublicKey: &rsassapkcs1pb.RsaSsaPkcs1PublicKey{ |
| Version: validPrivKey.GetPublicKey().GetVersion(), |
| E: validPrivKey.GetPublicKey().GetE(), |
| N: validPrivKey.GetPublicKey().GetN(), |
| Params: validPrivKey.GetPublicKey().GetParams(), |
| }, |
| D: validPrivKey.GetD(), |
| P: validPrivKey.GetP(), |
| Q: validPrivKey.GetQ(), |
| Dp: nil, |
| Dq: nil, |
| Crt: nil, |
| }, |
| }, |
| } { |
| t.Run(tc.name, func(t *testing.T) { |
| serializedKey, err := proto.Marshal(tc.key) |
| if err != nil { |
| t.Fatalf("proto.Marshal() err = %v, want nil", err) |
| } |
| if _, err := km.Primitive(serializedKey); err == nil { |
| t.Errorf("Primitive() err = nil, want error") |
| } |
| }) |
| } |
| } |
| |
| func TestRSASSAPKCS1SignerKeyManagerPrimitiveNewKey(t *testing.T) { |
| km, err := registry.GetKeyManager(rsaPKCS1PrivateKeyTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain RSASSAPKCS1Signer key manager: %s", err) |
| } |
| validPrivKey, err := makeValidRSAPKCS1Key() |
| if err != nil { |
| t.Fatalf("makeValidRSAPKCS1Key() err = %v, want nil", err) |
| } |
| keyFormat := &rsassapkcs1pb.RsaSsaPkcs1KeyFormat{ |
| Params: &rsassapkcs1pb.RsaSsaPkcs1Params{ |
| HashType: cpb.HashType_SHA256, |
| }, |
| ModulusSizeInBits: 3072, |
| PublicExponent: []byte{0x01, 0x00, 0x01}, |
| } |
| serializedFormat, err := proto.Marshal(keyFormat) |
| if err != nil { |
| t.Fatalf("proto.Marshal() err = %v, want nil", err) |
| } |
| m, err := km.NewKey(serializedFormat) |
| if err != nil { |
| t.Fatalf("NewKey() err = %v, want nil", err) |
| } |
| privKey, ok := m.(*rsassapkcs1pb.RsaSsaPkcs1PrivateKey) |
| if !ok { |
| t.Fatalf("privateKey is not a RsaSsaPkcs1PrivateKey") |
| } |
| if privKey.GetVersion() != validPrivKey.GetVersion() { |
| t.Errorf("GetVersion() = %d, want %d", privKey.GetVersion(), validPrivKey.GetVersion()) |
| } |
| wantPubKey := validPrivKey.GetPublicKey() |
| gotPubKey := privKey.GetPublicKey() |
| if gotPubKey.GetParams().GetHashType() != wantPubKey.GetParams().GetHashType() { |
| t.Errorf("GetHashType() = %v, want %v", gotPubKey.GetParams().GetHashType(), wantPubKey.GetParams().GetHashType()) |
| } |
| if !cmp.Equal(gotPubKey.GetE(), wantPubKey.GetE()) { |
| t.Errorf("GetE() = %v, want %v", gotPubKey.GetE(), wantPubKey.GetE()) |
| } |
| gotModSize := new(big.Int).SetBytes(gotPubKey.GetN()).BitLen() |
| if gotModSize != 3072 { |
| t.Errorf("Modulus Size = %d, want %d", gotModSize, 3072) |
| } |
| } |
| |
| func TestRSASSAPKCS1SignerKeyManagerPrimitiveNewKeyWithInvalidInputFails(t *testing.T) { |
| type testCase struct { |
| name string |
| format *rsassapkcs1pb.RsaSsaPkcs1KeyFormat |
| } |
| km, err := registry.GetKeyManager(rsaPKCS1PrivateKeyTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain RSASSAPKCS1Signer key manager: %s", err) |
| } |
| for _, tc := range []testCase{ |
| { |
| name: "empty format", |
| format: &rsassapkcs1pb.RsaSsaPkcs1KeyFormat{}, |
| }, |
| { |
| name: "invalid hash", |
| format: &rsassapkcs1pb.RsaSsaPkcs1KeyFormat{ |
| ModulusSizeInBits: 2048, |
| PublicExponent: []byte{0x01, 0x00, 0x01}, |
| Params: &rsassapkcs1pb.RsaSsaPkcs1Params{ |
| HashType: cpb.HashType_SHA224, |
| }, |
| }, |
| }, |
| { |
| name: "invalid public exponent", |
| format: &rsassapkcs1pb.RsaSsaPkcs1KeyFormat{ |
| ModulusSizeInBits: 2048, |
| PublicExponent: []byte{0x01}, |
| Params: &rsassapkcs1pb.RsaSsaPkcs1Params{ |
| HashType: cpb.HashType_SHA256, |
| }, |
| }, |
| }, |
| { |
| name: "invalid modulus size", |
| format: &rsassapkcs1pb.RsaSsaPkcs1KeyFormat{ |
| ModulusSizeInBits: 1024, |
| PublicExponent: []byte{0x01}, |
| Params: &rsassapkcs1pb.RsaSsaPkcs1Params{ |
| HashType: cpb.HashType_SHA256, |
| }, |
| }, |
| }, |
| } { |
| t.Run(tc.name, func(t *testing.T) { |
| serializedFormat, err := proto.Marshal(tc.format) |
| if err != nil { |
| t.Fatalf("proto.Marshal() err = %v, want nil", err) |
| } |
| if _, err := km.NewKey(serializedFormat); err == nil { |
| t.Fatalf("NewKey() err = nil, want error") |
| } |
| }) |
| } |
| } |
| |
| func TestRSASSAPKCS1SignerKeyManagerPrimitiveNewKeyData(t *testing.T) { |
| km, err := registry.GetKeyManager(rsaPKCS1PrivateKeyTypeURL) |
| if err != nil { |
| t.Errorf("cannot obtain RSASSAPKCS1Signer key manager: %s", err) |
| } |
| keyFormat := &rsassapkcs1pb.RsaSsaPkcs1KeyFormat{ |
| ModulusSizeInBits: 2048, |
| PublicExponent: []byte{0x01, 0x00, 0x01}, |
| Params: &rsassapkcs1pb.RsaSsaPkcs1Params{ |
| HashType: cpb.HashType_SHA256, |
| }, |
| } |
| serializedFormat, err := proto.Marshal(keyFormat) |
| if err != nil { |
| t.Fatalf("proto.Marshal() err = %v, want nil", err) |
| } |
| keyData, err := km.NewKeyData(serializedFormat) |
| if err != nil { |
| t.Fatalf("NewKeyData() err = %v, want nil", err) |
| } |
| if keyData.GetTypeUrl() != rsaPKCS1PrivateKeyTypeURL { |
| t.Fatalf("GetTypeUrl() = %v, want %v", keyData.GetTypeUrl(), rsaPKCS1PrivateKeyTypeURL) |
| } |
| if keyData.GetKeyMaterialType() != tinkpb.KeyData_ASYMMETRIC_PRIVATE { |
| t.Fatalf("GetKeyMaterialType() = %v, want %v", keyData.GetKeyMaterialType(), tinkpb.KeyData_ASYMMETRIC_PRIVATE) |
| } |
| } |
