Bitcoin Core  29.1.0
P2P Digital Currency
key_tests.cpp
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1 // Copyright (c) 2012-2022 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <key.h>
6 
7 #include <common/system.h>
8 #include <key_io.h>
9 #include <span.h>
10 #include <streams.h>
11 #include <secp256k1_extrakeys.h>
12 #include <test/util/random.h>
13 #include <test/util/setup_common.h>
14 #include <uint256.h>
15 #include <util/strencodings.h>
16 #include <util/string.h>
17 
18 #include <string>
19 #include <vector>
20 
21 #include <boost/test/unit_test.hpp>
22 
23 using namespace util::hex_literals;
24 using util::ToString;
25 
26 static const std::string strSecret1 = "5HxWvvfubhXpYYpS3tJkw6fq9jE9j18THftkZjHHfmFiWtmAbrj";
27 static const std::string strSecret2 = "5KC4ejrDjv152FGwP386VD1i2NYc5KkfSMyv1nGy1VGDxGHqVY3";
28 static const std::string strSecret1C = "Kwr371tjA9u2rFSMZjTNun2PXXP3WPZu2afRHTcta6KxEUdm1vEw";
29 static const std::string strSecret2C = "L3Hq7a8FEQwJkW1M2GNKDW28546Vp5miewcCzSqUD9kCAXrJdS3g";
30 static const std::string addr1 = "1QFqqMUD55ZV3PJEJZtaKCsQmjLT6JkjvJ";
31 static const std::string addr2 = "1F5y5E5FMc5YzdJtB9hLaUe43GDxEKXENJ";
32 static const std::string addr1C = "1NoJrossxPBKfCHuJXT4HadJrXRE9Fxiqs";
33 static const std::string addr2C = "1CRj2HyM1CXWzHAXLQtiGLyggNT9WQqsDs";
34 
35 static const std::string strAddressBad = "1HV9Lc3sNHZxwj4Zk6fB38tEmBryq2cBiF";
36 
37 
38 BOOST_FIXTURE_TEST_SUITE(key_tests, BasicTestingSetup)
39 
40 BOOST_AUTO_TEST_CASE(key_test1)
41 {
42  CKey key1 = DecodeSecret(strSecret1);
43  BOOST_CHECK(key1.IsValid() && !key1.IsCompressed());
44  CKey key2 = DecodeSecret(strSecret2);
45  BOOST_CHECK(key2.IsValid() && !key2.IsCompressed());
46  CKey key1C = DecodeSecret(strSecret1C);
47  BOOST_CHECK(key1C.IsValid() && key1C.IsCompressed());
48  CKey key2C = DecodeSecret(strSecret2C);
49  BOOST_CHECK(key2C.IsValid() && key2C.IsCompressed());
50  CKey bad_key = DecodeSecret(strAddressBad);
51  BOOST_CHECK(!bad_key.IsValid());
52 
53  CPubKey pubkey1 = key1. GetPubKey();
54  CPubKey pubkey2 = key2. GetPubKey();
55  CPubKey pubkey1C = key1C.GetPubKey();
56  CPubKey pubkey2C = key2C.GetPubKey();
57 
58  BOOST_CHECK(key1.VerifyPubKey(pubkey1));
59  BOOST_CHECK(!key1.VerifyPubKey(pubkey1C));
60  BOOST_CHECK(!key1.VerifyPubKey(pubkey2));
61  BOOST_CHECK(!key1.VerifyPubKey(pubkey2C));
62 
63  BOOST_CHECK(!key1C.VerifyPubKey(pubkey1));
64  BOOST_CHECK(key1C.VerifyPubKey(pubkey1C));
65  BOOST_CHECK(!key1C.VerifyPubKey(pubkey2));
66  BOOST_CHECK(!key1C.VerifyPubKey(pubkey2C));
67 
68  BOOST_CHECK(!key2.VerifyPubKey(pubkey1));
69  BOOST_CHECK(!key2.VerifyPubKey(pubkey1C));
70  BOOST_CHECK(key2.VerifyPubKey(pubkey2));
71  BOOST_CHECK(!key2.VerifyPubKey(pubkey2C));
72 
73  BOOST_CHECK(!key2C.VerifyPubKey(pubkey1));
74  BOOST_CHECK(!key2C.VerifyPubKey(pubkey1C));
75  BOOST_CHECK(!key2C.VerifyPubKey(pubkey2));
76  BOOST_CHECK(key2C.VerifyPubKey(pubkey2C));
77 
78  BOOST_CHECK(DecodeDestination(addr1) == CTxDestination(PKHash(pubkey1)));
79  BOOST_CHECK(DecodeDestination(addr2) == CTxDestination(PKHash(pubkey2)));
80  BOOST_CHECK(DecodeDestination(addr1C) == CTxDestination(PKHash(pubkey1C)));
81  BOOST_CHECK(DecodeDestination(addr2C) == CTxDestination(PKHash(pubkey2C)));
82 
83  for (int n=0; n<16; n++)
84  {
85  std::string strMsg = strprintf("Very secret message %i: 11", n);
86  uint256 hashMsg = Hash(strMsg);
87 
88  // normal signatures
89 
90  std::vector<unsigned char> sign1, sign2, sign1C, sign2C;
91 
92  BOOST_CHECK(key1.Sign (hashMsg, sign1));
93  BOOST_CHECK(key2.Sign (hashMsg, sign2));
94  BOOST_CHECK(key1C.Sign(hashMsg, sign1C));
95  BOOST_CHECK(key2C.Sign(hashMsg, sign2C));
96 
97  BOOST_CHECK( pubkey1.Verify(hashMsg, sign1));
98  BOOST_CHECK(!pubkey1.Verify(hashMsg, sign2));
99  BOOST_CHECK( pubkey1.Verify(hashMsg, sign1C));
100  BOOST_CHECK(!pubkey1.Verify(hashMsg, sign2C));
101 
102  BOOST_CHECK(!pubkey2.Verify(hashMsg, sign1));
103  BOOST_CHECK( pubkey2.Verify(hashMsg, sign2));
104  BOOST_CHECK(!pubkey2.Verify(hashMsg, sign1C));
105  BOOST_CHECK( pubkey2.Verify(hashMsg, sign2C));
106 
107  BOOST_CHECK( pubkey1C.Verify(hashMsg, sign1));
108  BOOST_CHECK(!pubkey1C.Verify(hashMsg, sign2));
109  BOOST_CHECK( pubkey1C.Verify(hashMsg, sign1C));
110  BOOST_CHECK(!pubkey1C.Verify(hashMsg, sign2C));
111 
112  BOOST_CHECK(!pubkey2C.Verify(hashMsg, sign1));
113  BOOST_CHECK( pubkey2C.Verify(hashMsg, sign2));
114  BOOST_CHECK(!pubkey2C.Verify(hashMsg, sign1C));
115  BOOST_CHECK( pubkey2C.Verify(hashMsg, sign2C));
116 
117  // compact signatures (with key recovery)
118 
119  std::vector<unsigned char> csign1, csign2, csign1C, csign2C;
120 
121  BOOST_CHECK(key1.SignCompact (hashMsg, csign1));
122  BOOST_CHECK(key2.SignCompact (hashMsg, csign2));
123  BOOST_CHECK(key1C.SignCompact(hashMsg, csign1C));
124  BOOST_CHECK(key2C.SignCompact(hashMsg, csign2C));
125 
126  CPubKey rkey1, rkey2, rkey1C, rkey2C;
127 
128  BOOST_CHECK(rkey1.RecoverCompact (hashMsg, csign1));
129  BOOST_CHECK(rkey2.RecoverCompact (hashMsg, csign2));
130  BOOST_CHECK(rkey1C.RecoverCompact(hashMsg, csign1C));
131  BOOST_CHECK(rkey2C.RecoverCompact(hashMsg, csign2C));
132 
133  BOOST_CHECK(rkey1 == pubkey1);
134  BOOST_CHECK(rkey2 == pubkey2);
135  BOOST_CHECK(rkey1C == pubkey1C);
136  BOOST_CHECK(rkey2C == pubkey2C);
137  }
138 
139  // test deterministic signing
140 
141  std::vector<unsigned char> detsig, detsigc;
142  std::string strMsg = "Very deterministic message";
143  uint256 hashMsg = Hash(strMsg);
144  BOOST_CHECK(key1.Sign(hashMsg, detsig));
145  BOOST_CHECK(key1C.Sign(hashMsg, detsigc));
146  BOOST_CHECK(detsig == detsigc);
147  BOOST_CHECK_EQUAL(HexStr(detsig), "304402205dbbddda71772d95ce91cd2d14b592cfbc1dd0aabd6a394b6c2d377bbe59d31d022014ddda21494a4e221f0824f0b8b924c43fa43c0ad57dccdaa11f81a6bd4582f6");
148 
149  BOOST_CHECK(key2.Sign(hashMsg, detsig));
150  BOOST_CHECK(key2C.Sign(hashMsg, detsigc));
151  BOOST_CHECK(detsig == detsigc);
152  BOOST_CHECK_EQUAL(HexStr(detsig), "3044022052d8a32079c11e79db95af63bb9600c5b04f21a9ca33dc129c2bfa8ac9dc1cd5022061d8ae5e0f6c1a16bde3719c64c2fd70e404b6428ab9a69566962e8771b5944d");
153 
154  BOOST_CHECK(key1.SignCompact(hashMsg, detsig));
155  BOOST_CHECK(key1C.SignCompact(hashMsg, detsigc));
156  BOOST_CHECK_EQUAL(HexStr(detsig), "1c5dbbddda71772d95ce91cd2d14b592cfbc1dd0aabd6a394b6c2d377bbe59d31d14ddda21494a4e221f0824f0b8b924c43fa43c0ad57dccdaa11f81a6bd4582f6");
157  BOOST_CHECK_EQUAL(HexStr(detsigc), "205dbbddda71772d95ce91cd2d14b592cfbc1dd0aabd6a394b6c2d377bbe59d31d14ddda21494a4e221f0824f0b8b924c43fa43c0ad57dccdaa11f81a6bd4582f6");
158 
159  BOOST_CHECK(key2.SignCompact(hashMsg, detsig));
160  BOOST_CHECK(key2C.SignCompact(hashMsg, detsigc));
161  BOOST_CHECK_EQUAL(HexStr(detsig), "1c52d8a32079c11e79db95af63bb9600c5b04f21a9ca33dc129c2bfa8ac9dc1cd561d8ae5e0f6c1a16bde3719c64c2fd70e404b6428ab9a69566962e8771b5944d");
162  BOOST_CHECK_EQUAL(HexStr(detsigc), "2052d8a32079c11e79db95af63bb9600c5b04f21a9ca33dc129c2bfa8ac9dc1cd561d8ae5e0f6c1a16bde3719c64c2fd70e404b6428ab9a69566962e8771b5944d");
163 }
164 
165 BOOST_AUTO_TEST_CASE(key_signature_tests)
166 {
167  // When entropy is specified, we should see at least one high R signature within 20 signatures
168  CKey key = DecodeSecret(strSecret1);
169  std::string msg = "A message to be signed";
170  uint256 msg_hash = Hash(msg);
171  std::vector<unsigned char> sig;
172  bool found = false;
173 
174  for (int i = 1; i <=20; ++i) {
175  sig.clear();
176  BOOST_CHECK(key.Sign(msg_hash, sig, false, i));
177  found = sig[3] == 0x21 && sig[4] == 0x00;
178  if (found) {
179  break;
180  }
181  }
182  BOOST_CHECK(found);
183 
184  // When entropy is not specified, we should always see low R signatures that are less than or equal to 70 bytes in 256 tries
185  // The low R signatures should always have the value of their "length of R" byte less than or equal to 32
186  // We should see at least one signature that is less than 70 bytes.
187  bool found_small = false;
188  bool found_big = false;
189  bool bad_sign = false;
190  for (int i = 0; i < 256; ++i) {
191  sig.clear();
192  std::string msg = "A message to be signed" + ToString(i);
193  msg_hash = Hash(msg);
194  if (!key.Sign(msg_hash, sig)) {
195  bad_sign = true;
196  break;
197  }
198  // sig.size() > 70 implies sig[3] > 32, because S is always low.
199  // But check both conditions anyway, just in case this implication is broken for some reason
200  if (sig[3] > 32 || sig.size() > 70) {
201  found_big = true;
202  break;
203  }
204  found_small |= sig.size() < 70;
205  }
206  BOOST_CHECK(!bad_sign);
207  BOOST_CHECK(!found_big);
208  BOOST_CHECK(found_small);
209 }
210 
211 static CPubKey UnserializePubkey(const std::vector<uint8_t>& data)
212 {
213  DataStream stream{};
214  stream << data;
215  CPubKey pubkey;
216  stream >> pubkey;
217  return pubkey;
218 }
219 
220 static unsigned int GetLen(unsigned char chHeader)
221 {
222  if (chHeader == 2 || chHeader == 3)
223  return CPubKey::COMPRESSED_SIZE;
224  if (chHeader == 4 || chHeader == 6 || chHeader == 7)
225  return CPubKey::SIZE;
226  return 0;
227 }
228 
229 static void CmpSerializationPubkey(const CPubKey& pubkey)
230 {
231  DataStream stream{};
232  stream << pubkey;
233  CPubKey pubkey2;
234  stream >> pubkey2;
235  BOOST_CHECK(pubkey == pubkey2);
236 }
237 
238 BOOST_AUTO_TEST_CASE(pubkey_unserialize)
239 {
240  for (uint8_t i = 2; i <= 7; ++i) {
241  CPubKey key = UnserializePubkey({0x02});
242  BOOST_CHECK(!key.IsValid());
243  CmpSerializationPubkey(key);
244  key = UnserializePubkey(std::vector<uint8_t>(GetLen(i), i));
245  CmpSerializationPubkey(key);
246  if (i == 5) {
247  BOOST_CHECK(!key.IsValid());
248  } else {
249  BOOST_CHECK(key.IsValid());
250  }
251  }
252 }
253 
254 BOOST_AUTO_TEST_CASE(bip340_test_vectors)
255 {
256  static const std::vector<std::pair<std::array<std::string, 3>, bool>> VECTORS = {
257  {{"F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9", "0000000000000000000000000000000000000000000000000000000000000000", "E907831F80848D1069A5371B402410364BDF1C5F8307B0084C55F1CE2DCA821525F66A4A85EA8B71E482A74F382D2CE5EBEEE8FDB2172F477DF4900D310536C0"}, true},
258  {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6896BD60EEAE296DB48A229FF71DFE071BDE413E6D43F917DC8DCF8C78DE33418906D11AC976ABCCB20B091292BFF4EA897EFCB639EA871CFA95F6DE339E4B0A"}, true},
259  {{"DD308AFEC5777E13121FA72B9CC1B7CC0139715309B086C960E18FD969774EB8", "7E2D58D8B3BCDF1ABADEC7829054F90DDA9805AAB56C77333024B9D0A508B75C", "5831AAEED7B44BB74E5EAB94BA9D4294C49BCF2A60728D8B4C200F50DD313C1BAB745879A5AD954A72C45A91C3A51D3C7ADEA98D82F8481E0E1E03674A6F3FB7"}, true},
260  {{"25D1DFF95105F5253C4022F628A996AD3A0D95FBF21D468A1B33F8C160D8F517", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "7EB0509757E246F19449885651611CB965ECC1A187DD51B64FDA1EDC9637D5EC97582B9CB13DB3933705B32BA982AF5AF25FD78881EBB32771FC5922EFC66EA3"}, true},
261  {{"D69C3509BB99E412E68B0FE8544E72837DFA30746D8BE2AA65975F29D22DC7B9", "4DF3C3F68FCC83B27E9D42C90431A72499F17875C81A599B566C9889B9696703", "00000000000000000000003B78CE563F89A0ED9414F5AA28AD0D96D6795F9C6376AFB1548AF603B3EB45C9F8207DEE1060CB71C04E80F593060B07D28308D7F4"}, true},
262  {{"EEFDEA4CDB677750A420FEE807EACF21EB9898AE79B9768766E4FAA04A2D4A34", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false},
263  {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "FFF97BD5755EEEA420453A14355235D382F6472F8568A18B2F057A14602975563CC27944640AC607CD107AE10923D9EF7A73C643E166BE5EBEAFA34B1AC553E2"}, false},
264  {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "1FA62E331EDBC21C394792D2AB1100A7B432B013DF3F6FF4F99FCB33E0E1515F28890B3EDB6E7189B630448B515CE4F8622A954CFE545735AAEA5134FCCDB2BD"}, false},
265  {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769961764B3AA9B2FFCB6EF947B6887A226E8D7C93E00C5ED0C1834FF0D0C2E6DA6"}, false},
266  {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "0000000000000000000000000000000000000000000000000000000000000000123DDA8328AF9C23A94C1FEECFD123BA4FB73476F0D594DCB65C6425BD186051"}, false},
267  {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "00000000000000000000000000000000000000000000000000000000000000017615FBAF5AE28864013C099742DEADB4DBA87F11AC6754F93780D5A1837CF197"}, false},
268  {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "4A298DACAE57395A15D0795DDBFD1DCB564DA82B0F269BC70A74F8220429BA1D69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false},
269  {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false},
270  {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141"}, false},
271  {{"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC30", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false}
272  };
273 
274  for (const auto& test : VECTORS) {
275  auto pubkey = ParseHex(test.first[0]);
276  auto msg = ParseHex(test.first[1]);
277  auto sig = ParseHex(test.first[2]);
278  BOOST_CHECK_EQUAL(XOnlyPubKey(pubkey).VerifySchnorr(uint256(msg), sig), test.second);
279  }
280 
281  static const std::vector<std::array<std::string, 5>> SIGN_VECTORS = {
282  {{"0000000000000000000000000000000000000000000000000000000000000003", "F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9", "0000000000000000000000000000000000000000000000000000000000000000", "0000000000000000000000000000000000000000000000000000000000000000", "E907831F80848D1069A5371B402410364BDF1C5F8307B0084C55F1CE2DCA821525F66A4A85EA8B71E482A74F382D2CE5EBEEE8FDB2172F477DF4900D310536C0"}},
283  {{"B7E151628AED2A6ABF7158809CF4F3C762E7160F38B4DA56A784D9045190CFEF", "DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "0000000000000000000000000000000000000000000000000000000000000001", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6896BD60EEAE296DB48A229FF71DFE071BDE413E6D43F917DC8DCF8C78DE33418906D11AC976ABCCB20B091292BFF4EA897EFCB639EA871CFA95F6DE339E4B0A"}},
284  {{"C90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B14E5C9", "DD308AFEC5777E13121FA72B9CC1B7CC0139715309B086C960E18FD969774EB8", "C87AA53824B4D7AE2EB035A2B5BBBCCC080E76CDC6D1692C4B0B62D798E6D906", "7E2D58D8B3BCDF1ABADEC7829054F90DDA9805AAB56C77333024B9D0A508B75C", "5831AAEED7B44BB74E5EAB94BA9D4294C49BCF2A60728D8B4C200F50DD313C1BAB745879A5AD954A72C45A91C3A51D3C7ADEA98D82F8481E0E1E03674A6F3FB7"}},
285  {{"0B432B2677937381AEF05BB02A66ECD012773062CF3FA2549E44F58ED2401710", "25D1DFF95105F5253C4022F628A996AD3A0D95FBF21D468A1B33F8C160D8F517", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "7EB0509757E246F19449885651611CB965ECC1A187DD51B64FDA1EDC9637D5EC97582B9CB13DB3933705B32BA982AF5AF25FD78881EBB32771FC5922EFC66EA3"}},
286  };
287 
288  for (const auto& [sec_hex, pub_hex, aux_hex, msg_hex, sig_hex] : SIGN_VECTORS) {
289  auto sec = ParseHex(sec_hex);
290  auto pub = ParseHex(pub_hex);
291  uint256 aux256(ParseHex(aux_hex));
292  uint256 msg256(ParseHex(msg_hex));
293  auto sig = ParseHex(sig_hex);
294  unsigned char sig64[64];
295 
296  // Run the untweaked test vectors above, comparing with exact expected signature.
297  CKey key;
298  key.Set(sec.begin(), sec.end(), true);
299  XOnlyPubKey pubkey(key.GetPubKey());
300  BOOST_CHECK(std::equal(pubkey.begin(), pubkey.end(), pub.begin(), pub.end()));
301  bool ok = key.SignSchnorr(msg256, sig64, nullptr, aux256);
302  BOOST_CHECK(ok);
303  BOOST_CHECK(std::vector<unsigned char>(sig64, sig64 + 64) == sig);
304  // Verify those signatures for good measure.
305  BOOST_CHECK(pubkey.VerifySchnorr(msg256, sig64));
306 
307  // Repeat the same check, but use the KeyPair directly without any merkle tweak
308  KeyPair keypair = key.ComputeKeyPair(/*merkle_root=*/nullptr);
309  bool kp_ok = keypair.SignSchnorr(msg256, sig64, aux256);
310  BOOST_CHECK(kp_ok);
311  BOOST_CHECK(pubkey.VerifySchnorr(msg256, sig64));
312  BOOST_CHECK(std::vector<unsigned char>(sig64, sig64 + 64) == sig);
313 
314  // Do 10 iterations where we sign with a random Merkle root to tweak,
315  // and compare against the resulting tweaked keys, with random aux.
316  // In iteration i=0 we tweak with empty Merkle tree.
317  for (int i = 0; i < 10; ++i) {
318  uint256 merkle_root;
319  if (i) merkle_root = m_rng.rand256();
320  auto tweaked = pubkey.CreateTapTweak(i ? &merkle_root : nullptr);
321  BOOST_CHECK(tweaked);
322  XOnlyPubKey tweaked_key = tweaked->first;
323  aux256 = m_rng.rand256();
324  bool ok = key.SignSchnorr(msg256, sig64, &merkle_root, aux256);
325  BOOST_CHECK(ok);
326  BOOST_CHECK(tweaked_key.VerifySchnorr(msg256, sig64));
327 
328  // Repeat the same check, but use the KeyPair class directly
329  KeyPair keypair = key.ComputeKeyPair(&merkle_root);
330  bool kp_ok = keypair.SignSchnorr(msg256, sig64, aux256);
331  BOOST_CHECK(kp_ok);
332  BOOST_CHECK(tweaked_key.VerifySchnorr(msg256, sig64));
333  }
334  }
335 }
336 
337 BOOST_AUTO_TEST_CASE(key_ellswift)
338 {
339  for (const auto& secret : {strSecret1, strSecret2, strSecret1C, strSecret2C}) {
340  CKey key = DecodeSecret(secret);
341  BOOST_CHECK(key.IsValid());
342 
343  uint256 ent32 = m_rng.rand256();
344  auto ellswift = key.EllSwiftCreate(AsBytes(Span{ent32}));
345 
346  CPubKey decoded_pubkey = ellswift.Decode();
347  if (!key.IsCompressed()) {
348  // The decoding constructor returns a compressed pubkey. If the
349  // original was uncompressed, we must decompress the decoded one
350  // to compare.
351  decoded_pubkey.Decompress();
352  }
353  BOOST_CHECK(key.GetPubKey() == decoded_pubkey);
354  }
355 }
356 
357 BOOST_AUTO_TEST_CASE(bip341_test_h)
358 {
359  constexpr auto G_uncompressed{"0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8"_hex};
360  HashWriter hw;
361  hw.write(G_uncompressed);
362  XOnlyPubKey H{hw.GetSHA256()};
363  BOOST_CHECK(XOnlyPubKey::NUMS_H == H);
364 }
365 
366 BOOST_AUTO_TEST_CASE(key_schnorr_tweak_smoke_test)
367 {
368  // Sanity check to ensure we get the same tweak using CPubKey vs secp256k1 functions
369  secp256k1_context* secp256k1_context_sign = secp256k1_context_create(SECP256K1_CONTEXT_NONE);
370 
371  CKey key;
372  key.MakeNewKey(true);
373  uint256 merkle_root = m_rng.rand256();
374 
375  // secp256k1 functions
376  secp256k1_keypair keypair;
377  BOOST_CHECK(secp256k1_keypair_create(secp256k1_context_sign, &keypair, UCharCast(key.begin())));
378  secp256k1_xonly_pubkey xonly_pubkey;
379  BOOST_CHECK(secp256k1_keypair_xonly_pub(secp256k1_context_sign, &xonly_pubkey, nullptr, &keypair));
380  unsigned char xonly_bytes[32];
381  BOOST_CHECK(secp256k1_xonly_pubkey_serialize(secp256k1_context_sign, xonly_bytes, &xonly_pubkey));
382  uint256 tweak_old = XOnlyPubKey(xonly_bytes).ComputeTapTweakHash(&merkle_root);
383 
384  // CPubKey
385  CPubKey pubkey = key.GetPubKey();
386  uint256 tweak_new = XOnlyPubKey(pubkey).ComputeTapTweakHash(&merkle_root);
387 
388  BOOST_CHECK_EQUAL(tweak_old, tweak_new);
389 
390  secp256k1_context_destroy(secp256k1_context_sign);
391 }
392 
393 BOOST_AUTO_TEST_SUITE_END()
strSecret2C
static const std::string strSecret2C
Definition: key_tests.cpp:29
BOOST_AUTO_TEST_CASE
BOOST_AUTO_TEST_CASE(key_test1)
Definition: key_tests.cpp:40
CPubKey::SIZE
static constexpr unsigned int SIZE
secp256k1:
Definition: pubkey.h:39
KeyPair::SignSchnorr
bool SignSchnorr(const uint256 &hash, Span< unsigned char > sig, const uint256 &aux) const
Definition: key.cpp:426
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Like TryParseHex, but returns an empty vector on invalid input.
Definition: strencodings.h:68
tests_wycheproof_generate.msg
def msg
Definition: tests_wycheproof_generate.py:56
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Definition: key_tests.cpp:211
strSecret1
static const std::string strSecret1
Definition: key_tests.cpp:26
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Definition: key.cpp:311
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Definition: key_tests.cpp:32
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Compute the keypair for a valid secret key.
Definition: main_impl.h:196
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Format arguments and return the string or write to given std::ostream (see tinyformat::format doc for...
Definition: tinyformat.h:1172
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Verify thoroughly whether a private key and a public key match.
Definition: key.cpp:236
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Compute the public key from a private key.
Definition: key.cpp:182
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data
Definition: test_vectors_musig2_generate.py:98
XOnlyPubKey::ComputeTapTweakHash
uint256 ComputeTapTweakHash(const uint256 *merkle_root) const
Compute the Taproot tweak as specified in BIP341, with *this as internal key:
Definition: pubkey.cpp:240
SECP256K1_CONTEXT_NONE
#define SECP256K1_CONTEXT_NONE
Context flags to pass to secp256k1_context_create, secp256k1_context_preallocated_size, and secp256k1_context_preallocated_create.
Definition: secp256k1.h:202
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static const XOnlyPubKey NUMS_H
Nothing Up My Sleeve point H Used as an internal key for provably disabling the key path spend see BI...
Definition: pubkey.h:239
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SECP256K1_API void secp256k1_context_destroy(secp256k1_context *ctx) SECP256K1_ARG_NONNULL(1)
Destroy a secp256k1 context object (created in dynamically allocated memory).
Definition: secp256k1.c:187
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Definition: secp256k1.c:61
CKey::SignSchnorr
bool SignSchnorr(const uint256 &hash, Span< unsigned char > sig, const uint256 *merkle_root, const uint256 &aux) const
Create a BIP-340 Schnorr signature, for the xonly-pubkey corresponding to *this, optionally tweaked b...
Definition: key.cpp:272
XOnlyPubKey::VerifySchnorr
bool VerifySchnorr(const uint256 &msg, Span< const unsigned char > sigbytes) const
Verify a Schnorr signature against this public key.
Definition: pubkey.cpp:230
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static const std::string strAddressBad
Definition: key_tests.cpp:35
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Definition: setup_common.h:64
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Definition: key.h:267
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bool SignCompact(const uint256 &hash, std::vector< unsigned char > &vchSig) const
Create a compact signature (65 bytes), which allows reconstructing the used public key...
Definition: key.cpp:249
secp256k1_extrakeys.h
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bool Sign(const uint256 &hash, std::vector< unsigned char > &vchSig, bool grind=true, uint32_t test_case=0) const
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Definition: key.cpp:208
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static constexpr unsigned int COMPRESSED_SIZE
Definition: pubkey.h:40
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Definition: hash.h:126
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Definition: key_tests.cpp:31
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Definition: key.cpp:347
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static const std::string strSecret1C
Definition: key_tests.cpp:28
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Definition: secp256k1_extrakeys.h:22
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static const std::string addr1
Definition: key_tests.cpp:30
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BOOST_FIXTURE_TEST_SUITE(cuckoocache_tests, BasicTestingSetup)
Test Suite for CuckooCache.
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void write(Span< const std::byte > src)
Definition: hash.h:106
DataStream
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Definition: streams.h:146
HashWriter
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Definition: hash.h:100
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bool IsValid() const
Definition: pubkey.h:189
BOOST_AUTO_TEST_SUITE_END
BOOST_AUTO_TEST_SUITE_END()
setup_common.h
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Definition: pubkey.h:33
CKey::MakeNewKey
void MakeNewKey(bool fCompressed)
Generate a new private key using a cryptographic PRNG.
Definition: key.cpp:161
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""_hex is a compile-time user-defined literal returning a std::array<std::byte>, equivalent to ParseH...
Definition: strencodings.h:427
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Check whether the public key corresponding to this private key is (to be) compressed.
Definition: key.h:126
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Get the x-only public key from a keypair.
Definition: main_impl.h:234
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void Set(const T pbegin, const T pend, bool fCompressedIn)
Initialize using begin and end iterators to byte data.
Definition: key.h:103
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Definition: secp256k1_extrakeys.h:33
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Definition: key.cpp:19
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Definition: uint256.h:201
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Definition: key_tests.cpp:27
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Definition: pubkey.cpp:277
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Definition: object.cpp:18
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Definition: sign.cpp:109
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Definition: addresstype.h:140
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Definition: key.h:119
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Definition: main_impl.h:44
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Definition: hex_base.cpp:29
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Definition: span.h:258
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Definition: key_tests.cpp:220
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Definition: span.h:280
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Definition: key_tests.cpp:229
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Definition: key.h:34
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Definition: span.h:97
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Definition: hash.h:75
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Definition: key_io.cpp:213
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Definition: key_io.cpp:299
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Definition: secp256k1.c:141
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Definition: key_tests.cpp:33
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Definition: string.h:233
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Definition: pubkey.cpp:321
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Definition: key.h:123
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Definition: object.cpp:17
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