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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(DefaultPoW, Options{}); err != nil {
t.Fatalf("failed to wrap message: %v", err)
}
if msg.Flags&signatureFlag != 0 {
t.Fatalf("signature flag mismatch: have %d, want %d", msg.Flags&signatureFlag, 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(DefaultPoW, Options{
From: key,
}); err != nil {
t.Fatalf("failed to sign message: %v", err)
}
if msg.Flags&signatureFlag != signatureFlag {
t.Fatalf("signature flag mismatch: have %d, want %d", msg.Flags&signatureFlag, signatureFlag)
}
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(DefaultPoW, Options{
To: &key.PublicKey,
})
if err != nil {
t.Fatalf("failed to encrypt message: %v", err)
}
if msg.Flags&signatureFlag != 0 {
t.Fatalf("signature flag mismatch: have %d, want %d", msg.Flags&signatureFlag, 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(DefaultPoW, Options{
From: fromKey,
To: &toKey.PublicKey,
})
if err != nil {
t.Fatalf("failed to encrypt message: %v", err)
}
if msg.Flags&signatureFlag != signatureFlag {
t.Fatalf("signature flag mismatch: have %d, want %d", msg.Flags&signatureFlag, signatureFlag)
}
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)
}
}
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