+++ /dev/null
-// Copyright (c) 2013-2017 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package btcec
-
-import (
- "bytes"
- "crypto/rand"
- "crypto/sha256"
- "encoding/hex"
- "fmt"
- "math/big"
- "testing"
-)
-
-type signatureTest struct {
- name string
- sig []byte
- der bool
- isValid bool
-}
-
-// decodeHex decodes the passed hex string and returns the resulting bytes. It
-// panics if an error occurs. This is only used in the tests as a helper since
-// the only way it can fail is if there is an error in the test source code.
-func decodeHex(hexStr string) []byte {
- b, err := hex.DecodeString(hexStr)
- if err != nil {
- panic("invalid hex string in test source: err " + err.Error() +
- ", hex: " + hexStr)
- }
-
- return b
-}
-
-var signatureTests = []signatureTest{
- // signatures from bitcoin blockchain tx
- // 0437cd7f8525ceed2324359c2d0ba26006d92d85
- {
- name: "valid signature.",
- sig: []byte{0x30, 0x44, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: true,
- },
- {
- name: "empty.",
- sig: []byte{},
- isValid: false,
- },
- {
- name: "bad magic.",
- sig: []byte{0x31, 0x44, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "bad 1st int marker magic.",
- sig: []byte{0x30, 0x44, 0x03, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "bad 2nd int marker.",
- sig: []byte{0x30, 0x44, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x03, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "short len",
- sig: []byte{0x30, 0x43, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "long len",
- sig: []byte{0x30, 0x45, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "long X",
- sig: []byte{0x30, 0x44, 0x02, 0x42, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "long Y",
- sig: []byte{0x30, 0x44, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x21, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "short Y",
- sig: []byte{0x30, 0x44, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x19, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "trailing crap.",
- sig: []byte{0x30, 0x44, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09, 0x01,
- },
- der: true,
-
- // This test is now passing (used to be failing) because there
- // are signatures in the blockchain that have trailing zero
- // bytes before the hashtype. So ParseSignature was fixed to
- // permit buffers with trailing nonsense after the actual
- // signature.
- isValid: true,
- },
- {
- name: "X == N ",
- sig: []byte{0x30, 0x44, 0x02, 0x20, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFE, 0xBA, 0xAE, 0xDC, 0xE6, 0xAF, 0x48,
- 0xA0, 0x3B, 0xBF, 0xD2, 0x5E, 0x8C, 0xD0, 0x36, 0x41,
- 0x41, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "X == N ",
- sig: []byte{0x30, 0x44, 0x02, 0x20, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFE, 0xBA, 0xAE, 0xDC, 0xE6, 0xAF, 0x48,
- 0xA0, 0x3B, 0xBF, 0xD2, 0x5E, 0x8C, 0xD0, 0x36, 0x41,
- 0x42, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: false,
- isValid: false,
- },
- {
- name: "Y == N",
- sig: []byte{0x30, 0x44, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFE, 0xBA, 0xAE, 0xDC, 0xE6, 0xAF, 0x48, 0xA0, 0x3B,
- 0xBF, 0xD2, 0x5E, 0x8C, 0xD0, 0x36, 0x41, 0x41,
- },
- der: true,
- isValid: false,
- },
- {
- name: "Y > N",
- sig: []byte{0x30, 0x44, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFE, 0xBA, 0xAE, 0xDC, 0xE6, 0xAF, 0x48, 0xA0, 0x3B,
- 0xBF, 0xD2, 0x5E, 0x8C, 0xD0, 0x36, 0x41, 0x42,
- },
- der: false,
- isValid: false,
- },
- {
- name: "0 len X.",
- sig: []byte{0x30, 0x24, 0x02, 0x00, 0x02, 0x20, 0x18, 0x15,
- 0x22, 0xec, 0x8e, 0xca, 0x07, 0xde, 0x48, 0x60, 0xa4,
- 0xac, 0xdd, 0x12, 0x90, 0x9d, 0x83, 0x1c, 0xc5, 0x6c,
- 0xbb, 0xac, 0x46, 0x22, 0x08, 0x22, 0x21, 0xa8, 0x76,
- 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "0 len Y.",
- sig: []byte{0x30, 0x24, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x00,
- },
- der: true,
- isValid: false,
- },
- {
- name: "extra R padding.",
- sig: []byte{0x30, 0x45, 0x02, 0x21, 0x00, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x20, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- {
- name: "extra S padding.",
- sig: []byte{0x30, 0x45, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x21, 0x00, 0x18, 0x15, 0x22, 0xec, 0x8e, 0xca,
- 0x07, 0xde, 0x48, 0x60, 0xa4, 0xac, 0xdd, 0x12, 0x90,
- 0x9d, 0x83, 0x1c, 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22,
- 0x08, 0x22, 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- der: true,
- isValid: false,
- },
- // Standard checks (in BER format, without checking for 'canonical' DER
- // signatures) don't test for negative numbers here because there isn't
- // a way that is the same between openssl and go that will mark a number
- // as negative. The Go ASN.1 parser marks numbers as negative when
- // openssl does not (it doesn't handle negative numbers that I can tell
- // at all. When not parsing DER signatures, which is done by by bitcoind
- // when accepting transactions into its mempool, we otherwise only check
- // for the coordinates being zero.
- {
- name: "X == 0",
- sig: []byte{0x30, 0x25, 0x02, 0x01, 0x00, 0x02, 0x20, 0x18,
- 0x15, 0x22, 0xec, 0x8e, 0xca, 0x07, 0xde, 0x48, 0x60,
- 0xa4, 0xac, 0xdd, 0x12, 0x90, 0x9d, 0x83, 0x1c, 0xc5,
- 0x6c, 0xbb, 0xac, 0x46, 0x22, 0x08, 0x22, 0x21, 0xa8,
- 0x76, 0x8d, 0x1d, 0x09,
- },
- der: false,
- isValid: false,
- },
- {
- name: "Y == 0.",
- sig: []byte{0x30, 0x25, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3, 0xa1,
- 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32, 0xe9, 0xd6,
- 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab, 0x5f, 0xb8, 0xcd,
- 0x41, 0x02, 0x01, 0x00,
- },
- der: false,
- isValid: false,
- },
-}
-
-func TestSignatures(t *testing.T) {
- for _, test := range signatureTests {
- var err error
- if test.der {
- _, err = ParseDERSignature(test.sig, S256())
- } else {
- _, err = ParseSignature(test.sig, S256())
- }
- if err != nil {
- if test.isValid {
- t.Errorf("%s signature failed when shouldn't %v",
- test.name, err)
- } /* else {
- t.Errorf("%s got error %v", test.name, err)
- } */
- continue
- }
- if !test.isValid {
- t.Errorf("%s counted as valid when it should fail",
- test.name)
- }
- }
-}
-
-// TestSignatureSerialize ensures that serializing signatures works as expected.
-func TestSignatureSerialize(t *testing.T) {
- tests := []struct {
- name string
- ecsig *Signature
- expected []byte
- }{
- // signature from bitcoin blockchain tx
- // 0437cd7f8525ceed2324359c2d0ba26006d92d85
- {
- "valid 1 - r and s most significant bits are zero",
- &Signature{
- R: fromHex("4e45e16932b8af514961a1d3a1a25fdf3f4f7732e9d624c6c61548ab5fb8cd41"),
- S: fromHex("181522ec8eca07de4860a4acdd12909d831cc56cbbac4622082221a8768d1d09"),
- },
- []byte{
- 0x30, 0x44, 0x02, 0x20, 0x4e, 0x45, 0xe1, 0x69,
- 0x32, 0xb8, 0xaf, 0x51, 0x49, 0x61, 0xa1, 0xd3,
- 0xa1, 0xa2, 0x5f, 0xdf, 0x3f, 0x4f, 0x77, 0x32,
- 0xe9, 0xd6, 0x24, 0xc6, 0xc6, 0x15, 0x48, 0xab,
- 0x5f, 0xb8, 0xcd, 0x41, 0x02, 0x20, 0x18, 0x15,
- 0x22, 0xec, 0x8e, 0xca, 0x07, 0xde, 0x48, 0x60,
- 0xa4, 0xac, 0xdd, 0x12, 0x90, 0x9d, 0x83, 0x1c,
- 0xc5, 0x6c, 0xbb, 0xac, 0x46, 0x22, 0x08, 0x22,
- 0x21, 0xa8, 0x76, 0x8d, 0x1d, 0x09,
- },
- },
- // signature from bitcoin blockchain tx
- // cb00f8a0573b18faa8c4f467b049f5d202bf1101d9ef2633bc611be70376a4b4
- {
- "valid 2 - r most significant bit is one",
- &Signature{
- R: fromHex("0082235e21a2300022738dabb8e1bbd9d19cfb1e7ab8c30a23b0afbb8d178abcf3"),
- S: fromHex("24bf68e256c534ddfaf966bf908deb944305596f7bdcc38d69acad7f9c868724"),
- },
- []byte{
- 0x30, 0x45, 0x02, 0x21, 0x00, 0x82, 0x23, 0x5e,
- 0x21, 0xa2, 0x30, 0x00, 0x22, 0x73, 0x8d, 0xab,
- 0xb8, 0xe1, 0xbb, 0xd9, 0xd1, 0x9c, 0xfb, 0x1e,
- 0x7a, 0xb8, 0xc3, 0x0a, 0x23, 0xb0, 0xaf, 0xbb,
- 0x8d, 0x17, 0x8a, 0xbc, 0xf3, 0x02, 0x20, 0x24,
- 0xbf, 0x68, 0xe2, 0x56, 0xc5, 0x34, 0xdd, 0xfa,
- 0xf9, 0x66, 0xbf, 0x90, 0x8d, 0xeb, 0x94, 0x43,
- 0x05, 0x59, 0x6f, 0x7b, 0xdc, 0xc3, 0x8d, 0x69,
- 0xac, 0xad, 0x7f, 0x9c, 0x86, 0x87, 0x24,
- },
- },
- // signature from bitcoin blockchain tx
- // fda204502a3345e08afd6af27377c052e77f1fefeaeb31bdd45f1e1237ca5470
- {
- "valid 3 - s most significant bit is one",
- &Signature{
- R: fromHex("1cadddc2838598fee7dc35a12b340c6bde8b389f7bfd19a1252a17c4b5ed2d71"),
- S: new(big.Int).Add(fromHex("00c1a251bbecb14b058a8bd77f65de87e51c47e95904f4c0e9d52eddc21c1415ac"), S256().N),
- },
- []byte{
- 0x30, 0x45, 0x02, 0x20, 0x1c, 0xad, 0xdd, 0xc2,
- 0x83, 0x85, 0x98, 0xfe, 0xe7, 0xdc, 0x35, 0xa1,
- 0x2b, 0x34, 0x0c, 0x6b, 0xde, 0x8b, 0x38, 0x9f,
- 0x7b, 0xfd, 0x19, 0xa1, 0x25, 0x2a, 0x17, 0xc4,
- 0xb5, 0xed, 0x2d, 0x71, 0x02, 0x21, 0x00, 0xc1,
- 0xa2, 0x51, 0xbb, 0xec, 0xb1, 0x4b, 0x05, 0x8a,
- 0x8b, 0xd7, 0x7f, 0x65, 0xde, 0x87, 0xe5, 0x1c,
- 0x47, 0xe9, 0x59, 0x04, 0xf4, 0xc0, 0xe9, 0xd5,
- 0x2e, 0xdd, 0xc2, 0x1c, 0x14, 0x15, 0xac,
- },
- },
- {
- "zero signature",
- &Signature{
- R: big.NewInt(0),
- S: big.NewInt(0),
- },
- []byte{0x30, 0x06, 0x02, 0x01, 0x00, 0x02, 0x01, 0x00},
- },
- }
-
- for i, test := range tests {
- result := test.ecsig.Serialize()
- if !bytes.Equal(result, test.expected) {
- t.Errorf("Serialize #%d (%s) unexpected result:\n"+
- "got: %x\nwant: %x", i, test.name, result,
- test.expected)
- }
- }
-}
-
-func testSignCompact(t *testing.T, tag string, curve *KoblitzCurve,
- data []byte, isCompressed bool) {
- tmp, _ := NewPrivateKey(curve)
- priv := (*PrivateKey)(tmp)
-
- hashed := []byte("testing")
- sig, err := SignCompact(curve, priv, hashed, isCompressed)
- if err != nil {
- t.Errorf("%s: error signing: %s", tag, err)
- return
- }
-
- pk, wasCompressed, err := 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 = 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 TestSignCompact(t *testing.T) {
- for i := 0; i < 256; i++ {
- name := fmt.Sprintf("test %d", i)
- data := make([]byte, 32)
- _, err := rand.Read(data)
- if err != nil {
- t.Errorf("failed to read random data for %s", name)
- continue
- }
- compressed := i%2 != 0
- testSignCompact(t, name, S256(), data, compressed)
- }
-}
-
-func TestRFC6979(t *testing.T) {
- // Test vectors matching Trezor and CoreBitcoin implementations.
- // - https://github.com/trezor/trezor-crypto/blob/9fea8f8ab377dc514e40c6fd1f7c89a74c1d8dc6/tests.c#L432-L453
- // - https://github.com/oleganza/CoreBitcoin/blob/e93dd71207861b5bf044415db5fa72405e7d8fbc/CoreBitcoin/BTCKey%2BTests.m#L23-L49
- tests := []struct {
- key string
- msg string
- nonce string
- signature string
- }{
- {
- "cca9fbcc1b41e5a95d369eaa6ddcff73b61a4efaa279cfc6567e8daa39cbaf50",
- "sample",
- "2df40ca70e639d89528a6b670d9d48d9165fdc0febc0974056bdce192b8e16a3",
- "3045022100af340daf02cc15c8d5d08d7735dfe6b98a474ed373bdb5fbecf7571be52b384202205009fb27f37034a9b24b707b7c6b79ca23ddef9e25f7282e8a797efe53a8f124",
- },
- {
- // This signature hits the case when S is higher than halforder.
- // If S is not canonicalized (lowered by halforder), this test will fail.
- "0000000000000000000000000000000000000000000000000000000000000001",
- "Satoshi Nakamoto",
- "8f8a276c19f4149656b280621e358cce24f5f52542772691ee69063b74f15d15",
- "3045022100934b1ea10a4b3c1757e2b0c017d0b6143ce3c9a7e6a4a49860d7a6ab210ee3d802202442ce9d2b916064108014783e923ec36b49743e2ffa1c4496f01a512aafd9e5",
- },
- {
- "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140",
- "Satoshi Nakamoto",
- "33a19b60e25fb6f4435af53a3d42d493644827367e6453928554f43e49aa6f90",
- "3045022100fd567d121db66e382991534ada77a6bd3106f0a1098c231e47993447cd6af2d002206b39cd0eb1bc8603e159ef5c20a5c8ad685a45b06ce9bebed3f153d10d93bed5",
- },
- {
- "f8b8af8ce3c7cca5e300d33939540c10d45ce001b8f252bfbc57ba0342904181",
- "Alan Turing",
- "525a82b70e67874398067543fd84c83d30c175fdc45fdeee082fe13b1d7cfdf1",
- "304402207063ae83e7f62bbb171798131b4a0564b956930092b33b07b395615d9ec7e15c022058dfcc1e00a35e1572f366ffe34ba0fc47db1e7189759b9fb233c5b05ab388ea",
- },
- {
- "0000000000000000000000000000000000000000000000000000000000000001",
- "All those moments will be lost in time, like tears in rain. Time to die...",
- "38aa22d72376b4dbc472e06c3ba403ee0a394da63fc58d88686c611aba98d6b3",
- "30450221008600dbd41e348fe5c9465ab92d23e3db8b98b873beecd930736488696438cb6b0220547fe64427496db33bf66019dacbf0039c04199abb0122918601db38a72cfc21",
- },
- {
- "e91671c46231f833a6406ccbea0e3e392c76c167bac1cb013f6f1013980455c2",
- "There is a computer disease that anybody who works with computers knows about. It's a very serious disease and it interferes completely with the work. The trouble with computers is that you 'play' with them!",
- "1f4b84c23a86a221d233f2521be018d9318639d5b8bbd6374a8a59232d16ad3d",
- "3045022100b552edd27580141f3b2a5463048cb7cd3e047b97c9f98076c32dbdf85a68718b0220279fa72dd19bfae05577e06c7c0c1900c371fcd5893f7e1d56a37d30174671f6",
- },
- }
-
- for i, test := range tests {
- privKey, _ := PrivKeyFromBytes(S256(), decodeHex(test.key))
- hash := sha256.Sum256([]byte(test.msg))
-
- // Ensure deterministically generated nonce is the expected value.
- gotNonce := nonceRFC6979(privKey.D, hash[:]).Bytes()
- wantNonce := decodeHex(test.nonce)
- if !bytes.Equal(gotNonce, wantNonce) {
- t.Errorf("NonceRFC6979 #%d (%s): Nonce is incorrect: "+
- "%x (expected %x)", i, test.msg, gotNonce,
- wantNonce)
- continue
- }
-
- // Ensure deterministically generated signature is the expected value.
- gotSig, err := privKey.Sign(hash[:])
- if err != nil {
- t.Errorf("Sign #%d (%s): unexpected error: %v", i,
- test.msg, err)
- continue
- }
- gotSigBytes := gotSig.Serialize()
- wantSigBytes := decodeHex(test.signature)
- if !bytes.Equal(gotSigBytes, wantSigBytes) {
- t.Errorf("Sign #%d (%s): mismatched signature: %x "+
- "(expected %x)", i, test.msg, gotSigBytes,
- wantSigBytes)
- continue
- }
- }
-}
-
-func TestSignatureIsEqual(t *testing.T) {
- sig1 := &Signature{
- R: fromHex("0082235e21a2300022738dabb8e1bbd9d19cfb1e7ab8c30a23b0afbb8d178abcf3"),
- S: fromHex("24bf68e256c534ddfaf966bf908deb944305596f7bdcc38d69acad7f9c868724"),
- }
- sig2 := &Signature{
- R: fromHex("4e45e16932b8af514961a1d3a1a25fdf3f4f7732e9d624c6c61548ab5fb8cd41"),
- S: fromHex("181522ec8eca07de4860a4acdd12909d831cc56cbbac4622082221a8768d1d09"),
- }
-
- if !sig1.IsEqual(sig1) {
- t.Fatalf("value of IsEqual is incorrect, %v is "+
- "equal to %v", sig1, sig1)
- }
-
- if sig1.IsEqual(sig2) {
- t.Fatalf("value of IsEqual is incorrect, %v is not "+
- "equal to %v", sig1, sig2)
- }
-}
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