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// Copyright 2023 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 ecies_test
import (
"testing"
"github.com/tink-crypto/tink-go/v2/core/registry"
"github.com/tink-crypto/tink-go/v2/hybrid/subtle"
commonpb "github.com/tink-crypto/tink-go/v2/proto/common_go_proto"
eahpb "github.com/tink-crypto/tink-go/v2/proto/ecies_aead_hkdf_go_proto"
)
const (
publicKeyTypeURL = "type.googleapis.com/google.crypto.tink.EciesAeadHkdfPublicKey"
publicKeyVersion = 0
)
func TestPublicKeyManagerPrimitive(t *testing.T) {
km, err := registry.GetKeyManager(publicKeyTypeURL)
if err != nil {
t.Fatalf("registry.GetKeyManager(%q) err = %v, want nil", publicKeyTypeURL, err)
}
serializedPublicKey := mustMarshal(t, makeValidECIESAEADHKDFPublicKey(t))
primitive, err := km.Primitive(serializedPublicKey)
if err != nil {
t.Fatalf("km.Primitive(serilizedPublicKey) err = %v, want nil", err)
}
if _, ok := primitive.(*subtle.ECIESAEADHKDFHybridEncrypt); !ok {
t.Errorf("primitive is not ECIESAEADHKDFHybridEncrypt")
}
}
func TestPublicKeyManagerPrimitiveErrors(t *testing.T) {
km, err := registry.GetKeyManager(publicKeyTypeURL)
if err != nil {
t.Fatalf("registry.GetKeyManager(%q) err = %v, want nil", publicKeyTypeURL, err)
}
testCases := []struct {
name string
key []byte
}{
{
name: "nil_key",
key: nil,
},
{
name: "invalid_version",
key: func() []byte {
k := makeValidECIESAEADHKDFPublicKey(t)
k.Version = publicKeyVersion + 1
return mustMarshal(t, k)
}(),
},
{
name: "nil_params",
key: func() []byte {
k := makeValidECIESAEADHKDFPublicKey(t)
k.Params = nil
return mustMarshal(t, k)
}(),
},
{
name: "nil_kem_params",
key: func() []byte {
k := makeValidECIESAEADHKDFPublicKey(t)
k.GetParams().KemParams = nil
return mustMarshal(t, k)
}(),
},
{
name: "nil_dem_params",
key: func() []byte {
k := makeValidECIESAEADHKDFPublicKey(t)
k.GetParams().DemParams = nil
return mustMarshal(t, k)
}(),
},
{
name: "unknown_kem_curve_type",
key: func() []byte {
k := makeValidECIESAEADHKDFPublicKey(t)
k.GetParams().GetKemParams().CurveType = commonpb.EllipticCurveType_UNKNOWN_CURVE
return mustMarshal(t, k)
}(),
},
{
name: "unknown_kem_hash_type",
key: func() []byte {
k := makeValidECIESAEADHKDFPublicKey(t)
k.GetParams().GetKemParams().HkdfHashType = commonpb.HashType_UNKNOWN_HASH
return mustMarshal(t, k)
}(),
},
{
name: "nil_dem_aead",
key: func() []byte {
k := makeValidECIESAEADHKDFPublicKey(t)
k.GetParams().GetDemParams().AeadDem = nil
return mustMarshal(t, k)
}(),
},
{
name: "unknown_point_format",
key: func() []byte {
k := makeValidECIESAEADHKDFPublicKey(t)
k.GetParams().EcPointFormat = commonpb.EcPointFormat_UNKNOWN_FORMAT
return mustMarshal(t, k)
}(),
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
if _, err := km.Primitive(tc.key); err == nil {
t.Fatalf("km.Primitive(serilizedPublicKey) err = nil, want non-nil")
}
})
}
}
func makeValidECIESAEADHKDFPublicKey(t *testing.T) *eahpb.EciesAeadHkdfPublicKey {
t.Helper()
privateKey := makeValidECIESAEADHKDFPrivateKey(t)
return privateKey.GetPublicKey()
}
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