Merge branch 'develop' of github.com-obscure:ethereum/go-ethereum into develop

1 files changed, 138 insertions, 0 deletions

diff --git a/whisper/message_test.go b/whisper/message_test.go
new file mode 100644
index 000000000..8d4c5e990
--- /dev/null
+++ b/whisper/message_test.go
@@ -0,0 +1,138 @@
+package whisper
+
+import (
+	"bytes"
+	"crypto/elliptic"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/crypto"
+)
+
+// Tests whether a message can be wrapped without any identity or encryption.
+func TestMessageSimpleWrap(t *testing.T) {
+	payload := []byte("hello world")
+
+	msg := NewMessage(payload)
+	if _, err := msg.Wrap(DefaultProofOfWork, Options{}); err != nil {
+		t.Fatalf("failed to wrap message: %v", err)
+	}
+	if msg.Flags&128 != 0 {
+		t.Fatalf("signature flag mismatch: have %d, want %d", (msg.Flags&128)>>7, 0)
+	}
+	if len(msg.Signature) != 0 {
+		t.Fatalf("signature found for simple wrapping: 0x%x", msg.Signature)
+	}
+	if bytes.Compare(msg.Payload, payload) != 0 {
+		t.Fatalf("payload mismatch after wrapping: have 0x%x, want 0x%x", msg.Payload, payload)
+	}
+}
+
+// Tests whether a message can be signed, and wrapped in plain-text.
+func TestMessageCleartextSignRecover(t *testing.T) {
+	key, err := crypto.GenerateKey()
+	if err != nil {
+		t.Fatalf("failed to create crypto key: %v", err)
+	}
+	payload := []byte("hello world")
+
+	msg := NewMessage(payload)
+	if _, err := msg.Wrap(DefaultProofOfWork, Options{
+		From: key,
+	}); err != nil {
+		t.Fatalf("failed to sign message: %v", err)
+	}
+	if msg.Flags&128 != 128 {
+		t.Fatalf("signature flag mismatch: have %d, want %d", (msg.Flags&128)>>7, 1)
+	}
+	if bytes.Compare(msg.Payload, payload) != 0 {
+		t.Fatalf("payload mismatch after signing: have 0x%x, want 0x%x", msg.Payload, payload)
+	}
+
+	pubKey := msg.Recover()
+	if pubKey == nil {
+		t.Fatalf("failed to recover public key")
+	}
+	p1 := elliptic.Marshal(crypto.S256(), key.PublicKey.X, key.PublicKey.Y)
+	p2 := elliptic.Marshal(crypto.S256(), pubKey.X, pubKey.Y)
+	if !bytes.Equal(p1, p2) {
+		t.Fatalf("public key mismatch: have 0x%x, want 0x%x", p2, p1)
+	}
+}
+
+// Tests whether a message can be encrypted and decrypted using an anonymous
+// sender (i.e. no signature).
+func TestMessageAnonymousEncryptDecrypt(t *testing.T) {
+	key, err := crypto.GenerateKey()
+	if err != nil {
+		t.Fatalf("failed to create recipient crypto key: %v", err)
+	}
+	payload := []byte("hello world")
+
+	msg := NewMessage(payload)
+	envelope, err := msg.Wrap(DefaultProofOfWork, Options{
+		To: &key.PublicKey,
+	})
+	if err != nil {
+		t.Fatalf("failed to encrypt message: %v", err)
+	}
+	if msg.Flags&128 != 0 {
+		t.Fatalf("signature flag mismatch: have %d, want %d", (msg.Flags&128)>>7, 0)
+	}
+	if len(msg.Signature) != 0 {
+		t.Fatalf("signature found for anonymous message: 0x%x", msg.Signature)
+	}
+
+	out, err := envelope.Open(key)
+	if err != nil {
+		t.Fatalf("failed to open encrypted message: %v", err)
+	}
+	if !bytes.Equal(out.Payload, payload) {
+		t.Error("payload mismatch: have 0x%x, want 0x%x", out.Payload, payload)
+	}
+}
+
+// Tests whether a message can be properly signed and encrypted.
+func TestMessageFullCrypto(t *testing.T) {
+	fromKey, err := crypto.GenerateKey()
+	if err != nil {
+		t.Fatalf("failed to create sender crypto key: %v", err)
+	}
+	toKey, err := crypto.GenerateKey()
+	if err != nil {
+		t.Fatalf("failed to create recipient crypto key: %v", err)
+	}
+
+	payload := []byte("hello world")
+	msg := NewMessage(payload)
+	envelope, err := msg.Wrap(DefaultProofOfWork, Options{
+		From: fromKey,
+		To:   &toKey.PublicKey,
+	})
+	if err != nil {
+		t.Fatalf("failed to encrypt message: %v", err)
+	}
+	if msg.Flags&128 != 128 {
+		t.Fatalf("signature flag mismatch: have %d, want %d", (msg.Flags&128)>>7, 1)
+	}
+	if len(msg.Signature) == 0 {
+		t.Fatalf("no signature found for signed message")
+	}
+
+	out, err := envelope.Open(toKey)
+	if err != nil {
+		t.Fatalf("failed to open encrypted message: %v", err)
+	}
+	if !bytes.Equal(out.Payload, payload) {
+		t.Error("payload mismatch: have 0x%x, want 0x%x", out.Payload, payload)
+	}
+
+	pubKey := out.Recover()
+	if pubKey == nil {
+		t.Fatalf("failed to recover public key")
+	}
+	p1 := elliptic.Marshal(crypto.S256(), fromKey.PublicKey.X, fromKey.PublicKey.Y)
+	p2 := elliptic.Marshal(crypto.S256(), pubKey.X, pubKey.Y)
+	if !bytes.Equal(p1, p2) {
+		t.Fatalf("public key mismatch: have 0x%x, want 0x%x", p2, p1)
+	}
+}