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signer_test.go
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signer_test.go
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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 rekor
import (
"bytes"
"context"
"crypto"
"encoding/base64"
"strings"
"testing"
"github.com/sigstore/cosign/internal/pkg/cosign/payload"
"github.com/sigstore/cosign/internal/pkg/cosign/rekor/mock"
"github.com/sigstore/cosign/pkg/cosign"
"github.com/sigstore/rekor/pkg/generated/client"
"github.com/sigstore/sigstore/pkg/signature"
)
func mustGetNewSigner(t *testing.T) signature.Signer {
t.Helper()
priv, err := cosign.GeneratePrivateKey()
if err != nil {
t.Fatalf("cosign.GeneratePrivateKey() failed: %v", err)
}
s, err := signature.LoadECDSASignerVerifier(priv, crypto.SHA256)
if err != nil {
t.Fatalf("signature.LoadECDSASignerVerifier(key, crypto.SHA256) failed: %v", err)
}
return s
}
func TestSigner(t *testing.T) {
// Need real cert and chain
payloadSigner := payload.NewSigner(mustGetNewSigner(t))
// Mock out Rekor client
var mClient client.Rekor
mClient.Entries = &mock.EntriesClient{}
testSigner := NewSigner(payloadSigner, &mClient)
testPayload := "test payload"
ociSig, pub, err := testSigner.Sign(context.Background(), strings.NewReader(testPayload))
if err != nil {
t.Fatalf("Sign() returned error: %v", err)
}
// Verify that the wrapped signer was called.
verifier, err := signature.LoadVerifier(pub, crypto.SHA256)
if err != nil {
t.Fatalf("signature.LoadVerifier(pub) returned error: %v", err)
}
b64Sig, err := ociSig.Base64Signature()
if err != nil {
t.Fatalf("ociSig.Base64Signature() returned error: %v", err)
}
sig, err := base64.StdEncoding.DecodeString(b64Sig)
if err != nil {
t.Fatalf("base64.StdEncoding.DecodeString(b64Sig) returned error: %v", err)
}
gotPayload, err := ociSig.Payload()
if err != nil {
t.Fatalf("ociSig.Payload() returned error: %v", err)
}
if string(gotPayload) != testPayload {
t.Errorf("ociSig.Payload() returned %q, wanted %q", string(gotPayload), testPayload)
}
if err = verifier.VerifySignature(bytes.NewReader(sig), bytes.NewReader(gotPayload)); err != nil {
t.Errorf("VerifySignature() returned error: %v", err)
}
}