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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 aessiv_test
import (
"testing"
"github.com/tink-crypto/tink-go/v2/daead/aessiv"
)
func TestNewParametersInvalidKeySize(t *testing.T) {
for _, keySize := range []int{1, 15, 17, 31, 33, 47, 49, 63, 65} {
if _, err := aessiv.NewParameters(keySize, aessiv.VariantTink); err == nil {
t.Errorf("aessiv.NewParameters(%v, %v) err = nil, want error", keySize, aessiv.VariantTink)
}
}
}
func TestNewParametersInvalidVariant(t *testing.T) {
if _, err := aessiv.NewParameters(32, aessiv.VariantUnknown); err == nil {
t.Errorf("aessiv.NewParameters(%v, %v) err = nil, want error", 32, aessiv.VariantUnknown)
}
}
func TestNewParametersWorks(t *testing.T) {
for _, test := range []struct {
name string
keySize int
variant aessiv.Variant
}{
{
name: "256-bit key with Tink prefix",
keySize: 32,
variant: aessiv.VariantTink,
},
{
name: "256-bit key with Crunchy prefix",
keySize: 32,
variant: aessiv.VariantCrunchy,
},
{
name: "256-bit key with NoPrefix prefix",
keySize: 32,
variant: aessiv.VariantNoPrefix,
},
{
name: "384-bit key with Tink prefix",
keySize: 48,
variant: aessiv.VariantTink,
},
{
name: "384-bit key with Crunchy prefix",
keySize: 48,
variant: aessiv.VariantCrunchy,
},
{
name: "384-bit key with NoPrefix prefix",
keySize: 48,
variant: aessiv.VariantNoPrefix,
},
{
name: "512-bit key with Tink prefix",
keySize: 64,
variant: aessiv.VariantTink,
},
{
name: "512-bit key with Crunchy prefix",
keySize: 64,
variant: aessiv.VariantCrunchy,
},
{
name: "512-bit key with NoPrefix prefix",
keySize: 64,
variant: aessiv.VariantNoPrefix,
},
} {
t.Run(test.name, func(t *testing.T) {
params, err := aessiv.NewParameters(test.keySize, test.variant)
if err != nil {
t.Fatalf("aessiv.NewParameters(%v, %v) err = %v, want nil", test.keySize, test.variant, err)
}
if params.HasIDRequirement() != (test.variant != aessiv.VariantNoPrefix) {
t.Errorf("params.HasIDRequirement() = %v, want %v", params.HasIDRequirement(), (test.variant != aessiv.VariantNoPrefix))
}
if params.KeySizeInBytes() != test.keySize {
t.Errorf("params.KeySizeInBytes()() = %v, want %v", params.KeySizeInBytes(), test.keySize)
}
if params.Variant() != test.variant {
t.Errorf("params.Variant() = %v, want %v", params.Variant(), test.variant)
}
otherParams, err := aessiv.NewParameters(test.keySize, test.variant)
if err != nil {
t.Fatalf("aessiv.NewParameters(%v, %v) err = %v, want nil", test.keySize, test.variant, err)
}
if !params.Equal(otherParams) {
t.Errorf("params.Equal(otherParams) = %v, want true", params.Equal(otherParams))
}
})
}
}
func TestParametersEqualFalseIfDifferent(t *testing.T) {
for _, test := range []struct {
name string
key1Size int
key1Variant aessiv.Variant
key2Size int
key2Variant aessiv.Variant
}{
{
name: "different key size",
key1Size: 32,
key1Variant: aessiv.VariantTink,
key2Size: 64,
key2Variant: aessiv.VariantTink,
},
{
name: "different prefix variant",
key1Size: 32,
key1Variant: aessiv.VariantCrunchy,
key2Size: 32,
key2Variant: aessiv.VariantTink,
},
} {
t.Run(test.name, func(t *testing.T) {
params1, err := aessiv.NewParameters(test.key1Size, test.key1Variant)
if err != nil {
t.Fatalf("aessiv.NewParameters(%v, %v) err = %v, want nil", test.key1Size, test.key1Variant, err)
}
params2, err := aessiv.NewParameters(test.key2Size, test.key2Variant)
if err != nil {
t.Errorf("aessiv.NewParameters(%v, %v) err = %v, want nil", test.key2Size, test.key2Variant, err)
}
if params1.Equal(params2) {
t.Errorf("params.Equal(params2) = %v, want false", params1.Equal(params2))
}
})
}
}
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