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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 slhdsa_test
import (
"testing"
"github.com/tink-crypto/tink-go/v2/keyset"
"github.com/tink-crypto/tink-go/v2/signature"
"github.com/tink-crypto/tink-go/v2/signature/slhdsa"
)
func TestCreateKeysetHandleFromParameters(t *testing.T) {
for _, tc := range []struct {
name string
hashType slhdsa.HashType
keySize int
sigType slhdsa.SignatureType
}{
{
name: "SLH-DSA-SHA2-128s",
hashType: slhdsa.SHA2,
keySize: 64,
sigType: slhdsa.SmallSignature,
},
{
name: "SLH-DSA-SHAKE-256f",
hashType: slhdsa.SHAKE,
keySize: 128,
sigType: slhdsa.FastSigning,
},
} {
t.Run(tc.name, func(t *testing.T) {
params, err := slhdsa.NewParameters(tc.hashType, tc.keySize, tc.sigType, slhdsa.VariantNoPrefix)
if err != nil {
t.Fatalf("slhdsa.NewParameters(%v, %v, %v, slhdsa.VariantNoPrefix) err = %v, want nil", tc.hashType, tc.keySize, tc.sigType, err)
}
manager := keyset.NewManager()
keyID, err := manager.AddNewKeyFromParameters(params)
if err != nil {
t.Fatalf("manager.AddNewKeyFromParameters(%v) err = %v, want nil", params, err)
}
manager.SetPrimary(keyID)
handle, err := manager.Handle()
if err != nil {
t.Fatalf("manager.Handle() err = %v, want nil", err)
}
// Make sure that we can sign and verify with the generated key.
signer, err := signature.NewSigner(handle)
if err != nil {
t.Fatalf("signature.NewSigner(handle) err = %v, want nil", err)
}
message := []byte("message")
signatureBytes, err := signer.Sign(message)
if err != nil {
t.Fatalf("signer.Sign(%v) err = %v, want nil", message, err)
}
publicHandle, err := handle.Public()
if err != nil {
t.Fatalf("handle.Public() err = %v, want nil", err)
}
verifier, err := signature.NewVerifier(publicHandle)
if err != nil {
t.Fatalf("signature.NewVerifier(handle) err = %v, want nil", err)
}
if err := verifier.Verify(signatureBytes, message); err != nil {
t.Fatalf("verifier.Verify(%v, %v) err = %v, want nil", signatureBytes, message, err)
}
// Create another keyset handle from the same parameters.
anotherManager := keyset.NewManager()
keyID, err = anotherManager.AddNewKeyFromParameters(params)
if err != nil {
t.Fatalf("anotherManager.AddNewKeyFromParameters(%v) err = %v, want nil", params, err)
}
anotherManager.SetPrimary(keyID)
anotherHandle, err := anotherManager.Handle()
if err != nil {
t.Fatalf("anotherManager.Handle() err = %v, want nil", err)
}
anotherPublicHandle, err := anotherHandle.Public()
if err != nil {
t.Fatalf("anotherHandle.Public() err = %v, want nil", err)
}
// Get the primary key entry from both keyset handles.
entry, err := handle.Primary()
if err != nil {
t.Fatalf("handle.Primary() err = %v, want nil", err)
}
anotherEntry, err := anotherHandle.Primary()
if err != nil {
t.Fatalf("anotherHandle.Primary() err = %v, want nil", err)
}
// Make sure that keys are different.
if entry.KeyID() == anotherEntry.KeyID() {
t.Fatalf("entry.KeyID() = %v, want different from anotherEntry.KeyID() = %v", entry.KeyID(), anotherEntry.KeyID())
}
if entry.Key().Equal(anotherEntry.Key()) {
t.Fatalf("entry.Key().Equal(anotherEntry.Key()) = true, want false")
}
publicEntry, err := publicHandle.Primary()
if err != nil {
t.Fatalf("handle.Primary() err = %v, want nil", err)
}
anotherPublicEntry, err := anotherHandle.Primary()
if err != nil {
t.Fatalf("anotherHandle.Primary() err = %v, want nil", err)
}
if publicEntry.KeyID() == anotherPublicEntry.KeyID() {
t.Fatalf("publicEntry.KeyID() = %v, want different from anotherPublicEntry.KeyID() = %v", publicEntry.KeyID(), anotherPublicEntry.KeyID())
}
if publicEntry.Key().Equal(anotherPublicEntry.Key()) {
t.Fatalf("publicEntry.Key().Equal(anotherPublicEntry.Key()) = true, want false")
}
// Make sure that a different generated key cannot verify the signature.
anotherVerifier, err := signature.NewVerifier(anotherPublicHandle)
if err != nil {
t.Fatalf("signature.NewVerifier(anotherHandle) err = %v, want nil", err)
}
if err := anotherVerifier.Verify(signatureBytes, message); err == nil {
t.Fatalf("anotherVerifier.Verify(%v, %v) err = nil, want error", signatureBytes, message)
}
})
}
}
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