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// Copyright 2019 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 daead_test
import (
"bytes"
"fmt"
"testing"
"github.com/tink-crypto/tink-go/v2/daead"
"github.com/tink-crypto/tink-go/v2/keyset"
tinkpb "github.com/tink-crypto/tink-go/v2/proto/tink_go_proto"
)
func TestKeyTemplates(t *testing.T) {
var testCases = []struct {
name string
template *tinkpb.KeyTemplate
}{
{name: "AES256_SIV",
template: daead.AESSIVKeyTemplate()},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
if err := testEncryptDecrypt(tc.template); err != nil {
t.Errorf("%v", err)
}
})
}
}
func testEncryptDecrypt(template *tinkpb.KeyTemplate) error {
handle, err := keyset.NewHandle(template)
if err != nil {
return fmt.Errorf("keyset.NewHandle(template) failed: %v", err)
}
primitive, err := daead.New(handle)
if err != nil {
return fmt.Errorf("daead.New(handle) failed: %v", err)
}
var testInputs = []struct {
plaintext []byte
aad1 []byte
aad2 []byte
}{
{
plaintext: []byte("some data to encrypt"),
aad1: []byte("extra data to authenticate"),
aad2: []byte("extra data to authenticate"),
}, {
plaintext: []byte("some data to encrypt"),
aad1: []byte(""),
aad2: []byte(""),
}, {
plaintext: []byte("some data to encrypt"),
aad1: nil,
aad2: nil,
}, {
plaintext: []byte(""),
aad1: nil,
aad2: nil,
}, {
plaintext: nil,
aad1: []byte("extra data to authenticate"),
aad2: []byte("extra data to authenticate"),
}, {
plaintext: nil,
aad1: []byte(""),
aad2: []byte(""),
}, {
plaintext: nil,
aad1: nil,
aad2: nil,
}, {
plaintext: []byte("some data to encrypt"),
aad1: []byte(""),
aad2: nil,
}, {
plaintext: []byte("some data to encrypt"),
aad1: nil,
aad2: []byte(""),
},
}
for _, ti := range testInputs {
ciphertext, err := primitive.EncryptDeterministically(ti.plaintext, ti.aad1)
if err != nil {
return fmt.Errorf("encryption failed, error: %v", err)
}
decrypted, err := primitive.DecryptDeterministically(ciphertext, ti.aad2)
if err != nil {
return fmt.Errorf("decryption failed, error: %v", err)
}
if !bytes.Equal(ti.plaintext, decrypted) {
return fmt.Errorf("decrypted data doesn't match plaintext, got: %q, want: %q", decrypted, ti.plaintext)
}
}
return nil
}
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