Example #1
0
func Test_Secp256_06b(t *testing.T) {
	pubkey1, seckey := GenerateKeyPair()
	msg := randentropy.GetEntropyCSPRNG(32)
	sig, _ := Sign(msg, seckey)

	fail_count := 0
	for i := 0; i < TESTS; i++ {
		msg = randentropy.GetEntropyCSPRNG(32)
		pubkey2, _ := RecoverPubkey(msg, sig)
		if bytes.Equal(pubkey1, pubkey2) == true {
			t.Fail()
		}

		if pubkey2 != nil && VerifySignature(msg, sig, pubkey2) != nil {
			t.Fail()
		}

		if VerifySignature(msg, sig, pubkey1) == nil {
			t.Fail()
		}
	}
	if fail_count != 0 {
		fmt.Printf("ERROR: Accepted signature for %v of %v random messages\n", fail_count, TESTS)
	}
}
Example #2
0
func Sign(msg []byte, seckey []byte) ([]byte, error) {
	nonce := randentropy.GetEntropyCSPRNG(32)

	var sig []byte = make([]byte, 65)
	var recid C.int

	var msg_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&msg[0]))
	var sig_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&sig[0]))
	var seckey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&seckey[0]))

	var noncefp_ptr = &(*C.secp256k1_nonce_function_default)
	var ndata_ptr = unsafe.Pointer(&nonce[0])

	if C.secp256k1_ec_seckey_verify(seckey_ptr) != C.int(1) {
		return nil, errors.New("Invalid secret key")
	}

	ret := C.secp256k1_ecdsa_sign_compact(
		msg_ptr,
		sig_ptr,
		seckey_ptr,
		noncefp_ptr,
		ndata_ptr,
		&recid)

	sig[64] = byte(int(recid))

	if ret != C.int(1) {
		// nonce invalid, retry
		return Sign(msg, seckey)
	}

	return sig, nil

}
Example #3
0
//test pubkey recovery
func Test_Secp256_02a(t *testing.T) {
	pubkey1, seckey1 := GenerateKeyPair()
	msg := randentropy.GetEntropyCSPRNG(32)
	sig, _ := Sign(msg, seckey1)

	if sig == nil {
		t.Fatal("Signature nil")
	}
	err := VerifySignature(msg, sig, pubkey1)
	if err != nil {
		t.Fatal("Signature invalid")
	}

	pubkey2, _ := RecoverPubkey(msg, sig)
	if len(pubkey1) != len(pubkey2) {
		t.Fatal()
	}
	for i, _ := range pubkey1 {
		if pubkey1[i] != pubkey2[i] {
			t.Fatal()
		}
	}
	if bytes.Equal(pubkey1, pubkey2) == false {
		t.Fatal()
	}
}
Example #4
0
func Test_Secp256_06a_alt0(t *testing.T) {
	pubkey1, seckey := GenerateKeyPair()
	msg := randentropy.GetEntropyCSPRNG(32)
	sig, _ := Sign(msg, seckey)

	if sig == nil {
		t.Fail()
	}
	if len(sig) != 65 {
		t.Fail()
	}
	for i := 0; i < TESTS; i++ {
		sig = randSig()
		pubkey2, _ := RecoverPubkey(msg, sig)

		if bytes.Equal(pubkey1, pubkey2) == true {
			t.Fail()
		}

		if pubkey2 != nil && VerifySignature(msg, sig, pubkey2) != nil {
			t.Fail()
		}

		if VerifySignature(msg, sig, pubkey1) == nil {
			t.Fail()
		}
	}
}
Example #5
0
func Test_Secp256_00(t *testing.T) {

	var nonce []byte = randentropy.GetEntropyCSPRNG(32) //going to get bitcoins stolen!

	if len(nonce) != 32 {
		t.Fatal()
	}

}
Example #6
0
//test random messages for the same pub/private key
func Test_Secp256_03(t *testing.T) {
	_, seckey := GenerateKeyPair()
	for i := 0; i < TESTS; i++ {
		msg := randentropy.GetEntropyCSPRNG(32)
		sig, _ := Sign(msg, seckey)
		CompactSigTest(sig)

		sig[len(sig)-1] %= 4
		pubkey2, _ := RecoverPubkey(msg, sig)
		if pubkey2 == nil {
			t.Fail()
		}
	}
}
Example #7
0
//test random messages for different pub/private keys
func Test_Secp256_04(t *testing.T) {
	for i := 0; i < TESTS; i++ {
		pubkey1, seckey := GenerateKeyPair()
		msg := randentropy.GetEntropyCSPRNG(32)
		sig, _ := Sign(msg, seckey)
		CompactSigTest(sig)

		if sig[len(sig)-1] >= 4 {
			t.Fail()
		}
		pubkey2, _ := RecoverPubkey(msg, sig)
		if pubkey2 == nil {
			t.Fail()
		}
		if bytes.Equal(pubkey1, pubkey2) == false {
			t.Fail()
		}
	}
}
Example #8
0
func GenerateKeyPair() ([]byte, []byte) {

	pubkey_len := C.int(65)
	const seckey_len = 32

	var pubkey []byte = make([]byte, pubkey_len)
	var seckey []byte = randentropy.GetEntropyCSPRNG(seckey_len)

	var pubkey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&pubkey[0]))
	var seckey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&seckey[0]))

	ret := C.secp256k1_ec_pubkey_create(
		pubkey_ptr, &pubkey_len,
		seckey_ptr, 0)

	if ret != C.int(1) {
		return GenerateKeyPair() //invalid secret, try again
	}
	return pubkey, seckey
}
Example #9
0
//test signing message
func Test_Secp256_02(t *testing.T) {
	pubkey1, seckey := GenerateKeyPair()
	msg := randentropy.GetEntropyCSPRNG(32)
	sig, _ := Sign(msg, seckey)
	if sig == nil {
		t.Fatal("Signature nil")
	}

	pubkey2, _ := RecoverPubkey(msg, sig)
	if pubkey2 == nil {
		t.Fatal("Recovered pubkey invalid")
	}
	if bytes.Equal(pubkey1, pubkey2) == false {
		t.Fatal("Recovered pubkey does not match")
	}

	err := VerifySignature(msg, sig, pubkey1)
	if err != nil {
		t.Fatal("Signature invalid")
	}
}
Example #10
0
//test size of messages
func Test_Secp256_02s(t *testing.T) {
	pubkey, seckey := GenerateKeyPair()
	msg := randentropy.GetEntropyCSPRNG(32)
	sig, _ := Sign(msg, seckey)
	CompactSigTest(sig)
	if sig == nil {
		t.Fatal("Signature nil")
	}
	if len(pubkey) != 65 {
		t.Fail()
	}
	if len(seckey) != 32 {
		t.Fail()
	}
	if len(sig) != 64+1 {
		t.Fail()
	}
	if int(sig[64]) > 4 {
		t.Fail()
	} //should be 0 to 4
}
Example #11
0
func randSig() []byte {
	sig := randentropy.GetEntropyCSPRNG(65)
	sig[32] &= 0x70
	sig[64] %= 4
	return sig
}