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// Copyright 2022 The Sigstore Authors.
//
// 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 fake
import (
"bytes"
"context"
"crypto"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/sha256"
"testing"
"github.com/sigstore/sigstore/pkg/cryptoutils"
"github.com/sigstore/sigstore/pkg/signature/kms"
)
func TestFakeSigner(t *testing.T) {
msg := []byte{1, 2, 3, 4, 5}
signer, err := kms.Get(context.Background(), "fakekms://key", crypto.SHA256)
if err != nil {
t.Fatalf("unexpected error getting signer: %v", err)
}
pub, err := signer.PublicKey()
if err != nil {
t.Fatalf("unexpected error getting public key")
}
createdPub, err := signer.CreateKey(context.Background(), "")
if err != nil {
t.Fatalf("unexpected error creating key: %v", err)
}
if err := cryptoutils.EqualKeys(createdPub, pub); err != nil {
t.Fatalf("expected public keys to be equal: %v", err)
}
if signer.DefaultAlgorithm() != signer.SupportedAlgorithms()[0] {
t.Fatal("expected algorithms to match")
}
// Test crypto.Signer implementation
cryptoSigner, _, err := signer.CryptoSigner(context.Background(), func(_ error) {})
if err != nil {
t.Fatalf("unexpected error fetching crypto.Signer: %v", err)
}
if err := cryptoutils.EqualKeys(cryptoSigner.Public(), pub); err != nil {
t.Fatalf("expected public keys to be equal: %v", err)
}
sha := sha256.New()
sha.Write(msg)
digest := sha.Sum(nil)
sig, err := cryptoSigner.Sign(rand.Reader, digest, nil)
if err != nil {
t.Fatalf("unexpected error signing with crypto.Signer: %v", err)
}
if err := signer.VerifySignature(bytes.NewReader(sig), bytes.NewReader(msg)); err != nil {
t.Fatalf("unexpected error verifying signature: %v", err)
}
}
func TestFakeSignerWithPrivateKey(t *testing.T) {
msg := []byte{1, 2, 3, 4, 5}
priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
t.Fatalf("error generating ecdsa private key: %v", err)
}
signer, err := kms.Get(context.WithValue(context.TODO(), KmsCtxKey{}, priv), "fakekms://key", crypto.SHA256)
if err != nil {
t.Fatalf("unexpected error getting signer: %v", err)
}
pub, err := signer.PublicKey()
if err != nil {
t.Fatalf("unexpected error getting public key")
}
// Compare public key to provided key
if err := cryptoutils.EqualKeys(priv.Public(), pub); err != nil {
t.Fatalf("expected public keys to be equal: %v", err)
}
createdPub, err := signer.CreateKey(context.Background(), "")
if err != nil {
t.Fatalf("unexpected error creating key: %v", err)
}
if err := cryptoutils.EqualKeys(createdPub, pub); err != nil {
t.Fatalf("expected public keys to be equal: %v", err)
}
if signer.DefaultAlgorithm() != signer.SupportedAlgorithms()[0] {
t.Fatal("expected algorithms to match")
}
// Test crypto.Signer implementation
cryptoSigner, _, err := signer.CryptoSigner(context.Background(), func(_ error) {})
if err != nil {
t.Fatalf("unexpected error fetching crypto.Signer: %v", err)
}
if err := cryptoutils.EqualKeys(cryptoSigner.Public(), pub); err != nil {
t.Fatalf("expected public keys to be equal: %v", err)
}
sha := sha256.New()
sha.Write(msg)
digest := sha.Sum(nil)
sig, err := cryptoSigner.Sign(rand.Reader, digest, nil)
if err != nil {
t.Fatalf("unexpected error signing with crypto.Signer: %v", err)
}
if err := signer.VerifySignature(bytes.NewReader(sig), bytes.NewReader(msg)); err != nil {
t.Fatalf("unexpected error verifying signature: %v", err)
}
}
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