func testKeyGeneration(t *testing.T, c *btcec.KoblitzCurve, tag string) {
priv, err := btcec.NewPrivateKey(c)
if err != nil {
t.Errorf("%s: error: %s", tag, err)
return
}
if !c.IsOnCurve(priv.PublicKey.X, priv.PublicKey.Y) {
t.Errorf("%s: public key invalid: %s", tag, err)
}
}
func TestGenerateSharedSecret(t *testing.T) {
privKey1, err := btcec.NewPrivateKey(btcec.S256())
if err != nil {
t.Errorf("private key generation error: %s", err)
return
}
privKey2, err := btcec.NewPrivateKey(btcec.S256())
if err != nil {
t.Errorf("private key generation error: %s", err)
return
}
secret1 := btcec.GenerateSharedSecret(privKey1, privKey2.PubKey())
secret2 := btcec.GenerateSharedSecret(privKey2, privKey1.PubKey())
if !bytes.Equal(secret1, secret2) {
t.Errorf("ECDH failed, secrets mismatch - first: %x, second: %x",
secret1, secret2)
}
}
func testSignCompact(t *testing.T, tag string, curve *btcec.KoblitzCurve,
data []byte, isCompressed bool) {
tmp, _ := btcec.NewPrivateKey(curve)
priv := (*btcec.PrivateKey)(tmp)
hashed := []byte("testing")
sig, err := btcec.SignCompact(curve, priv, hashed, isCompressed)
if err != nil {
t.Errorf("%s: error signing: %s", tag, err)
return
}
pk, wasCompressed, err := btcec.RecoverCompact(curve, sig, hashed)
if err != nil {
t.Errorf("%s: error recovering: %s", tag, err)
return
}
if pk.X.Cmp(priv.X) != 0 || pk.Y.Cmp(priv.Y) != 0 {
t.Errorf("%s: recovered pubkey doesn't match original "+
"(%v,%v) vs (%v,%v) ", tag, pk.X, pk.Y, priv.X, priv.Y)
return
}
if wasCompressed != isCompressed {
t.Errorf("%s: recovered pubkey doesn't match compressed state "+
"(%v vs %v)", tag, isCompressed, wasCompressed)
return
}
// If we change the compressed bit we should get the same key back,
// but the compressed flag should be reversed.
if isCompressed {
sig[0] -= 4
} else {
sig[0] += 4
}
pk, wasCompressed, err = btcec.RecoverCompact(curve, sig, hashed)
if err != nil {
t.Errorf("%s: error recovering (2): %s", tag, err)
return
}
if pk.X.Cmp(priv.X) != 0 || pk.Y.Cmp(priv.Y) != 0 {
t.Errorf("%s: recovered pubkey (2) doesn't match original "+
"(%v,%v) vs (%v,%v) ", tag, pk.X, pk.Y, priv.X, priv.Y)
return
}
if wasCompressed == isCompressed {
t.Errorf("%s: recovered pubkey doesn't match reversed "+
"compressed state (%v vs %v)", tag, isCompressed,
wasCompressed)
return
}
}
func testSignAndVerify(t *testing.T, c *btcec.KoblitzCurve, tag string) {
priv, _ := btcec.NewPrivateKey(c)
pub := priv.PubKey()
hashed := []byte("testing")
sig, err := priv.Sign(hashed)
if err != nil {
t.Errorf("%s: error signing: %s", tag, err)
return
}
if !sig.Verify(hashed, pub) {
t.Errorf("%s: Verify failed", tag)
}
hashed[0] ^= 0xff
if sig.Verify(hashed, pub) {
t.Errorf("%s: Verify always works!", tag)
}
}
// Test 1: Encryption and decryption
func TestCipheringBasic(t *testing.T) {
privkey, err := btcec.NewPrivateKey(btcec.S256())
if err != nil {
t.Fatal("failed to generate private key")
}
in := []byte("Hey there dude. How are you doing? This is a test.")
out, err := btcec.Encrypt(privkey.PubKey(), in)
if err != nil {
t.Fatal("failed to encrypt:", err)
}
dec, err := btcec.Decrypt(privkey, out)
if err != nil {
t.Fatal("failed to decrypt:", err)
}
if !bytes.Equal(in, dec) {
t.Error("decrypted data doesn't match original")
}
}
func TestCipheringErrors(t *testing.T) {
privkey, err := btcec.NewPrivateKey(btcec.S256())
if err != nil {
t.Fatal("failed to generate private key")
}
tests1 := []struct {
ciphertext []byte // input ciphertext
}{
{bytes.Repeat([]byte{0x00}, 133)}, // errInputTooShort
{bytes.Repeat([]byte{0x00}, 134)}, // errUnsupportedCurve
{bytes.Repeat([]byte{0x02, 0xCA}, 134)}, // errInvalidXLength
{bytes.Repeat([]byte{0x02, 0xCA, 0x00, 0x20}, 134)}, // errInvalidYLength
{[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // IV
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0xCA, 0x00, 0x20, // curve and X length
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // X
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x20, // Y length
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Y
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // ciphertext
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // MAC
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
}}, // invalid pubkey
{[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // IV
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0xCA, 0x00, 0x20, // curve and X length
0x11, 0x5C, 0x42, 0xE7, 0x57, 0xB2, 0xEF, 0xB7, // X
0x67, 0x1C, 0x57, 0x85, 0x30, 0xEC, 0x19, 0x1A,
0x13, 0x59, 0x38, 0x1E, 0x6A, 0x71, 0x12, 0x7A,
0x9D, 0x37, 0xC4, 0x86, 0xFD, 0x30, 0xDA, 0xE5,
0x00, 0x20, // Y length
0x7E, 0x76, 0xDC, 0x58, 0xF6, 0x93, 0xBD, 0x7E, // Y
0x70, 0x10, 0x35, 0x8C, 0xE6, 0xB1, 0x65, 0xE4,
0x83, 0xA2, 0x92, 0x10, 0x10, 0xDB, 0x67, 0xAC,
0x11, 0xB1, 0xB5, 0x1B, 0x65, 0x19, 0x53, 0xD2,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // ciphertext
// padding not aligned to 16 bytes
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // MAC
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
}}, // errInvalidPadding
{[]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // IV
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0xCA, 0x00, 0x20, // curve and X length
0x11, 0x5C, 0x42, 0xE7, 0x57, 0xB2, 0xEF, 0xB7, // X
0x67, 0x1C, 0x57, 0x85, 0x30, 0xEC, 0x19, 0x1A,
0x13, 0x59, 0x38, 0x1E, 0x6A, 0x71, 0x12, 0x7A,
0x9D, 0x37, 0xC4, 0x86, 0xFD, 0x30, 0xDA, 0xE5,
0x00, 0x20, // Y length
0x7E, 0x76, 0xDC, 0x58, 0xF6, 0x93, 0xBD, 0x7E, // Y
0x70, 0x10, 0x35, 0x8C, 0xE6, 0xB1, 0x65, 0xE4,
0x83, 0xA2, 0x92, 0x10, 0x10, 0xDB, 0x67, 0xAC,
0x11, 0xB1, 0xB5, 0x1B, 0x65, 0x19, 0x53, 0xD2,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // ciphertext
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // MAC
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
}}, // ErrInvalidMAC
}
for i, test := range tests1 {
_, err = btcec.Decrypt(privkey, test.ciphertext)
if err == nil {
t.Errorf("Decrypt #%d did not get error", i)
}
}
// test error from removePKCSPadding
tests2 := []struct {
in []byte // input data
}{
{bytes.Repeat([]byte{0x11}, 17)},
{bytes.Repeat([]byte{0x07}, 15)},
}
for i, test := range tests2 {
_, err = btcec.TstRemovePKCSPadding(test.in)
if err == nil {
t.Errorf("removePKCSPadding #%d did not get error", i)
}
}
}