1 files changed, 184 insertions, 0 deletions
diff --git a/pkg/signature/dsse/dsse_test.go b/pkg/signature/dsse/dsse_test.go
new file mode 100644
index 0000000..b89edc1
--- /dev/null
+++ b/pkg/signature/dsse/dsse_test.go
@@ -0,0 +1,184 @@
+//
+// Copyright 2021 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 dsse
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/json"
+	"strings"
+	"testing"
+
+	"github.com/secure-systems-lab/go-securesystemslib/dsse"
+	"github.com/sigstore/sigstore/pkg/signature"
+)
+
+func TestRoundTrip(t *testing.T) {
+	p, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sv, err := signature.LoadECDSASignerVerifier(p, crypto.SHA256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	data := "sometestdata"
+	payloadType := "foo"
+
+	wsv := WrapSignerVerifier(sv, payloadType)
+
+	sig, err := wsv.SignMessage(strings.NewReader(data))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if err := wsv.VerifySignature(bytes.NewReader(sig), nil); err != nil {
+		t.Fatal(err)
+	}
+
+	env := dsse.Envelope{}
+	if err := json.Unmarshal(sig, &env); err != nil {
+		t.Fatal(err)
+	}
+	if env.PayloadType != payloadType {
+		t.Errorf("Expected payloadType %s, got %s", payloadType, env.PayloadType)
+	}
+
+	got, err := base64.StdEncoding.DecodeString(env.Payload)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if string(got) != data {
+		t.Errorf("Expected payload %s, got %s", data, env.Payload)
+	}
+}
+
+func TestMultiRoundTrip(t *testing.T) {
+	p, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sv, err := signature.LoadECDSASignerVerifier(p, crypto.SHA256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p2, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sv2, err := signature.LoadECDSASignerVerifier(p2, crypto.SHA256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	data := "sometestdata"
+	payloadType := "foo"
+
+	wsv := WrapMultiSignerVerifier(payloadType, 2, sv, sv2)
+
+	sig, err := wsv.SignMessage(strings.NewReader(data))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if err := wsv.VerifySignature(bytes.NewReader(sig), nil); err != nil {
+		t.Fatal(err)
+	}
+
+	env := dsse.Envelope{}
+	if err := json.Unmarshal(sig, &env); err != nil {
+		t.Fatal(err)
+	}
+	if env.PayloadType != payloadType {
+		t.Errorf("Expected payloadType %s, got %s", payloadType, env.PayloadType)
+	}
+
+	got, err := base64.StdEncoding.DecodeString(env.Payload)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if string(got) != data {
+		t.Errorf("Expected payload %s, got %s", data, env.Payload)
+	}
+}
+
+func TestInvalidThresholdMultiRoundTrip(t *testing.T) {
+	p, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sv, err := signature.LoadECDSASignerVerifier(p, crypto.SHA256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p2, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sv2, err := signature.LoadECDSASignerVerifier(p2, crypto.SHA256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	data := "sometestdata"
+	payloadType := "foo"
+
+	ws := WrapMultiSigner(payloadType, sv, sv2)
+
+	sig, err := ws.SignMessage(strings.NewReader(data))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	wv := WrapMultiVerifier(payloadType, 2, sv)
+
+	if err := wv.VerifySignature(bytes.NewReader(sig), nil); err == nil {
+		t.Fatalf("Did not fail verification on bogus signature")
+	}
+}
+
+func TestInvalidSignature(t *testing.T) {
+	p, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	v, err := signature.LoadECDSAVerifier(&p.PublicKey, crypto.SHA256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	wv := WrapVerifier(v)
+	sig := []byte("not valid JSON")
+
+	if err := wv.VerifySignature(bytes.NewReader(sig), nil); err == nil {
+		t.Fatalf("Did not fail verification on bogus signature")
+	}
+}