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// Copyright 2025 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 (
"bytes"
"fmt"
"testing"
"github.com/tink-crypto/tink-go/v2/aead/aesctrhmac"
"github.com/tink-crypto/tink-go/v2/aead/aesgcm"
"github.com/tink-crypto/tink-go/v2/aead/xchacha20poly1305"
"github.com/tink-crypto/tink-go/v2/daead/aessiv"
"github.com/tink-crypto/tink-go/v2/hybrid/ecies"
"github.com/tink-crypto/tink-go/v2/key"
)
func mustCreateSupportedDEMPArams(t *testing.T) map[string]key.Parameters {
aes128GCMParams, err := aesgcm.NewParameters(aesgcm.ParametersOpts{
KeySizeInBytes: 16,
IVSizeInBytes: 12,
TagSizeInBytes: 16,
Variant: aesgcm.VariantNoPrefix,
})
if err != nil {
t.Fatalf("failed to create AES128-GCM parameters: %v", err)
}
aes256GCMParams, err := aesgcm.NewParameters(aesgcm.ParametersOpts{
KeySizeInBytes: 32,
IVSizeInBytes: 12,
TagSizeInBytes: 16,
Variant: aesgcm.VariantNoPrefix,
})
if err != nil {
t.Fatalf("failed to create AES256-GCM parameters: %v", err)
}
aes256SIVParams, err := aessiv.NewParameters(64, aessiv.VariantNoPrefix)
if err != nil {
t.Fatalf("failed to create AES-SIV parameters: %v", err)
}
xchacha20poly1305Params, err := xchacha20poly1305.NewParameters(xchacha20poly1305.VariantNoPrefix)
if err != nil {
t.Fatalf("failed to create XChaCha20Poly1305 parameters: %v", err)
}
aes128CTRHMACSHA256Params, err := aesctrhmac.NewParameters(aesctrhmac.ParametersOpts{
AESKeySizeInBytes: 16,
HMACKeySizeInBytes: 32,
IVSizeInBytes: 16,
HashType: aesctrhmac.SHA256,
TagSizeInBytes: 16,
Variant: aesctrhmac.VariantNoPrefix,
})
if err != nil {
t.Fatalf("failed to create AES-CTR-HMAC parameters: %v", err)
}
aes256CTRHMACSHA256Params, err := aesctrhmac.NewParameters(aesctrhmac.ParametersOpts{
AESKeySizeInBytes: 32,
HMACKeySizeInBytes: 32,
IVSizeInBytes: 16,
HashType: aesctrhmac.SHA256,
TagSizeInBytes: 32,
Variant: aesctrhmac.VariantNoPrefix,
})
if err != nil {
t.Fatalf("failed to create AES256-CTR-HMAC parameters: %v", err)
}
return map[string]key.Parameters{
"AES128-GCM-NoPrefix": aes128GCMParams,
"AES256-GCM-NoPrefix": aes256GCMParams,
"AES256-SIV-NoPrefix": aes256SIVParams,
"XChaCha20Poly1305-NoPrefix": xchacha20poly1305Params,
"AES128-CTR-HMAC-SHA256-NoPrefix": aes128CTRHMACSHA256Params,
"AES256-CTR-HMAC-SHA256-NoPrefix": aes256CTRHMACSHA256Params,
}
}
func TestNewParametersInvalidValues(t *testing.T) {
demParams := mustCreateSupportedDEMPArams(t)
// Unsupported DEM parameters.
unsupportedDEMParams, err := aesgcm.NewParameters(aesgcm.ParametersOpts{
KeySizeInBytes: 24,
IVSizeInBytes: 12,
TagSizeInBytes: 16,
Variant: aesgcm.VariantNoPrefix,
})
if err != nil {
t.Fatalf("failed to create unsupported DEM parameters: %v", err)
}
testCases := []struct {
name string
opts ecies.ParametersOpts
}{
{
name: "unknown curve type",
opts: ecies.ParametersOpts{
CurveType: ecies.UnknownCurveType,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.CompressedPointFormat,
DEMParameters: demParams["AES128-GCM-NoPrefix"],
Variant: ecies.VariantTink,
},
},
{
name: "unusupported DEM",
opts: ecies.ParametersOpts{
CurveType: ecies.NISTP256,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.CompressedPointFormat,
DEMParameters: unsupportedDEMParams,
Variant: ecies.VariantTink,
},
},
{
name: "unspecified point format with NIST curve",
opts: ecies.ParametersOpts{
CurveType: ecies.NISTP256,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.UnspecifiedPointFormat,
DEMParameters: demParams["AES128-GCM-NoPrefix"],
Variant: ecies.VariantTink,
},
},
{
name: "specified point format with X25519 curve",
opts: ecies.ParametersOpts{
CurveType: ecies.X25519,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.CompressedPointFormat,
DEMParameters: demParams["AES128-GCM-NoPrefix"],
Variant: ecies.VariantTink,
},
},
{
name: "unknown variant",
opts: ecies.ParametersOpts{
CurveType: ecies.X25519,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.UnspecifiedPointFormat,
DEMParameters: demParams["AES128-GCM-NoPrefix"],
Variant: ecies.VariantUnknown,
},
},
{
name: "unknown hash type",
opts: ecies.ParametersOpts{
CurveType: ecies.NISTP256,
HashType: ecies.UnknownHashType,
NISTCurvePointFormat: ecies.CompressedPointFormat,
DEMParameters: demParams["AES128-GCM-NoPrefix"],
Variant: ecies.VariantTink,
},
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
if _, err := ecies.NewParameters(tc.opts); err == nil {
t.Errorf("ecies.NewParameters(%v) = nil, want error", tc.opts)
}
})
}
}
type testCase struct {
name string
opts ecies.ParametersOpts
}
func testCases(t *testing.T) []testCase {
demParams := mustCreateSupportedDEMPArams(t)
var testCases []testCase
for _, hashType := range []ecies.HashType{ecies.SHA256, ecies.SHA384, ecies.SHA512} {
for _, demID := range []string{"AES128-GCM-NoPrefix", "AES256-GCM-NoPrefix", "AES256-SIV-NoPrefix", "XChaCha20Poly1305-NoPrefix", "AES128-CTR-HMAC-SHA256-NoPrefix", "AES256-CTR-HMAC-SHA256-NoPrefix"} {
for _, variant := range []ecies.Variant{ecies.VariantTink, ecies.VariantNoPrefix, ecies.VariantCrunchy} {
for _, salt := range [][]byte{nil, []byte("salt")} {
for _, curveType := range []ecies.CurveType{ecies.NISTP256, ecies.NISTP384, ecies.NISTP521} {
for _, pointFormat := range []ecies.PointFormat{ecies.CompressedPointFormat, ecies.UncompressedPointFormat} {
testCases = append(testCases, testCase{
name: fmt.Sprintf("%v-%v-%v-%v-%v-%v", curveType, hashType, pointFormat, demID, variant, salt),
opts: ecies.ParametersOpts{
CurveType: curveType,
HashType: hashType,
NISTCurvePointFormat: pointFormat,
DEMParameters: demParams[demID],
Salt: salt,
Variant: variant,
},
})
}
}
testCases = append(testCases, testCase{
name: fmt.Sprintf("%v-%v-%v-%v-%v-%v", ecies.X25519, hashType, ecies.UnspecifiedPointFormat, demID, variant, salt),
opts: ecies.ParametersOpts{
CurveType: ecies.X25519,
HashType: hashType,
NISTCurvePointFormat: ecies.UnspecifiedPointFormat,
DEMParameters: demParams[demID],
Salt: salt,
Variant: variant,
},
})
}
}
}
}
return testCases
}
func TestNewParameters(t *testing.T) {
for _, tc := range testCases(t) {
t.Run(tc.name, func(t *testing.T) {
params, err := ecies.NewParameters(tc.opts)
if err != nil {
t.Fatalf("ecies.NewParameters(%v) = %v, want nil", tc.opts, err)
}
if got, want := params.CurveType(), tc.opts.CurveType; got != want {
t.Errorf("params.CurveType() = %v, want %v", got, want)
}
if got, want := params.HashType(), tc.opts.HashType; got != want {
t.Errorf("params.HashType() = %v, want %v", got, want)
}
if got, want := params.NISTCurvePointFormat(), tc.opts.NISTCurvePointFormat; got != want {
t.Errorf("params.NISTCurvePointFormat() = %v, want %v", got, want)
}
if got, want := params.Variant(), tc.opts.Variant; got != want {
t.Errorf("params.Variant() = %v, want %v", got, want)
}
if got, want := params.DEMParameters(), tc.opts.DEMParameters; !got.Equal(want) {
t.Errorf("params.DEMParameters() = %v, want %v", got, want)
}
if got, want := params.Salt(), tc.opts.Salt; !bytes.Equal(got, want) {
t.Errorf("params.Salt() = %v, want %v", got, want)
}
if got, want := params.HasIDRequirement(), tc.opts.Variant != ecies.VariantNoPrefix; got != want {
t.Errorf("params.HasIDRequirement() = %v, want %v", got, want)
}
other, err := ecies.NewParameters(tc.opts)
if err != nil {
t.Fatalf("ecies.NewParameters() = %v, want nil", err)
}
if !params.Equal(other) {
t.Errorf("params.Equal(other) = false, want true")
}
})
}
}
func TestParametersNotEqual(t *testing.T) {
aesGCMDEMParams, err := aesgcm.NewParameters(aesgcm.ParametersOpts{
KeySizeInBytes: 32,
IVSizeInBytes: 12,
TagSizeInBytes: 16,
Variant: aesgcm.VariantNoPrefix,
})
if err != nil {
t.Fatalf("aesgcm.NewParameters() err = %v, want nil", err)
}
aesGCMSIVDEMParams, err := aessiv.NewParameters(64, aessiv.VariantNoPrefix)
if err != nil {
t.Fatalf("aessiv.NewParameters() err = %v, want nil", err)
}
type paramsTestCase struct {
params *ecies.Parameters
}
for _, tc := range []struct {
name string
paramsOpts1 ecies.ParametersOpts
paramsOpts2 ecies.ParametersOpts
}{
{
name: "Different DEM parameters",
paramsOpts1: ecies.ParametersOpts{
CurveType: ecies.X25519,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.UnspecifiedPointFormat,
DEMParameters: aesGCMDEMParams,
Variant: ecies.VariantTink,
},
paramsOpts2: ecies.ParametersOpts{
CurveType: ecies.X25519,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.UnspecifiedPointFormat,
DEMParameters: aesGCMSIVDEMParams,
Variant: ecies.VariantTink,
},
},
{
name: "Different variant",
paramsOpts1: ecies.ParametersOpts{
CurveType: ecies.X25519,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.UnspecifiedPointFormat,
DEMParameters: aesGCMDEMParams,
Variant: ecies.VariantTink,
},
paramsOpts2: ecies.ParametersOpts{
CurveType: ecies.X25519,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.UnspecifiedPointFormat,
DEMParameters: aesGCMDEMParams,
Variant: ecies.VariantCrunchy,
},
},
{
name: "Different point format",
paramsOpts1: ecies.ParametersOpts{
CurveType: ecies.NISTP256,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.CompressedPointFormat,
DEMParameters: aesGCMDEMParams,
Variant: ecies.VariantTink,
},
paramsOpts2: ecies.ParametersOpts{
CurveType: ecies.NISTP256,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.UncompressedPointFormat,
DEMParameters: aesGCMDEMParams,
Variant: ecies.VariantTink,
},
},
{
name: "Different NIST curve",
paramsOpts1: ecies.ParametersOpts{
CurveType: ecies.NISTP256,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.CompressedPointFormat,
DEMParameters: aesGCMDEMParams,
Variant: ecies.VariantTink,
},
paramsOpts2: ecies.ParametersOpts{
CurveType: ecies.NISTP384,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.CompressedPointFormat,
DEMParameters: aesGCMDEMParams,
Variant: ecies.VariantTink,
},
},
{
name: "Different hash",
paramsOpts1: ecies.ParametersOpts{
CurveType: ecies.NISTP256,
HashType: ecies.SHA256,
NISTCurvePointFormat: ecies.CompressedPointFormat,
DEMParameters: aesGCMDEMParams,
Variant: ecies.VariantTink,
},
paramsOpts2: ecies.ParametersOpts{
CurveType: ecies.NISTP256,
HashType: ecies.SHA512,
NISTCurvePointFormat: ecies.CompressedPointFormat,
DEMParameters: aesGCMDEMParams,
Variant: ecies.VariantTink,
},
},
} {
t.Run(tc.name, func(t *testing.T) {
params1, err := ecies.NewParameters(tc.paramsOpts1)
if err != nil {
t.Fatalf("ecies.NewParameters(%v) err = %v, want nil", tc.paramsOpts1, err)
}
params2, err := ecies.NewParameters(tc.paramsOpts2)
if err != nil {
t.Fatalf("ecies.NewParameters(%v) err = %v, want nil", tc.paramsOpts2, err)
}
if params1.Equal(params2) {
t.Errorf("params1.Equal(params2) = true, want false")
}
})
}
}
|
