Bitcoin Core 28.0.0
P2P Digital Currency
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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
23using util::ToString;
24
25static const std::string strSecret1 = "5HxWvvfubhXpYYpS3tJkw6fq9jE9j18THftkZjHHfmFiWtmAbrj";
26static const std::string strSecret2 = "5KC4ejrDjv152FGwP386VD1i2NYc5KkfSMyv1nGy1VGDxGHqVY3";
27static const std::string strSecret1C = "Kwr371tjA9u2rFSMZjTNun2PXXP3WPZu2afRHTcta6KxEUdm1vEw";
28static const std::string strSecret2C = "L3Hq7a8FEQwJkW1M2GNKDW28546Vp5miewcCzSqUD9kCAXrJdS3g";
29static const std::string addr1 = "1QFqqMUD55ZV3PJEJZtaKCsQmjLT6JkjvJ";
30static const std::string addr2 = "1F5y5E5FMc5YzdJtB9hLaUe43GDxEKXENJ";
31static const std::string addr1C = "1NoJrossxPBKfCHuJXT4HadJrXRE9Fxiqs";
32static const std::string addr2C = "1CRj2HyM1CXWzHAXLQtiGLyggNT9WQqsDs";
33
34static const std::string strAddressBad = "1HV9Lc3sNHZxwj4Zk6fB38tEmBryq2cBiF";
35
36
37BOOST_FIXTURE_TEST_SUITE(key_tests, BasicTestingSetup)
38
39BOOST_AUTO_TEST_CASE(key_test1)
40{
41 CKey key1 = DecodeSecret(strSecret1);
42 BOOST_CHECK(key1.IsValid() && !key1.IsCompressed());
43 CKey key2 = DecodeSecret(strSecret2);
44 BOOST_CHECK(key2.IsValid() && !key2.IsCompressed());
45 CKey key1C = DecodeSecret(strSecret1C);
46 BOOST_CHECK(key1C.IsValid() && key1C.IsCompressed());
47 CKey key2C = DecodeSecret(strSecret2C);
48 BOOST_CHECK(key2C.IsValid() && key2C.IsCompressed());
49 CKey bad_key = DecodeSecret(strAddressBad);
50 BOOST_CHECK(!bad_key.IsValid());
51
52 CPubKey pubkey1 = key1. GetPubKey();
53 CPubKey pubkey2 = key2. GetPubKey();
54 CPubKey pubkey1C = key1C.GetPubKey();
55 CPubKey pubkey2C = key2C.GetPubKey();
56
57 BOOST_CHECK(key1.VerifyPubKey(pubkey1));
58 BOOST_CHECK(!key1.VerifyPubKey(pubkey1C));
59 BOOST_CHECK(!key1.VerifyPubKey(pubkey2));
60 BOOST_CHECK(!key1.VerifyPubKey(pubkey2C));
61
62 BOOST_CHECK(!key1C.VerifyPubKey(pubkey1));
63 BOOST_CHECK(key1C.VerifyPubKey(pubkey1C));
64 BOOST_CHECK(!key1C.VerifyPubKey(pubkey2));
65 BOOST_CHECK(!key1C.VerifyPubKey(pubkey2C));
66
67 BOOST_CHECK(!key2.VerifyPubKey(pubkey1));
68 BOOST_CHECK(!key2.VerifyPubKey(pubkey1C));
69 BOOST_CHECK(key2.VerifyPubKey(pubkey2));
70 BOOST_CHECK(!key2.VerifyPubKey(pubkey2C));
71
72 BOOST_CHECK(!key2C.VerifyPubKey(pubkey1));
73 BOOST_CHECK(!key2C.VerifyPubKey(pubkey1C));
74 BOOST_CHECK(!key2C.VerifyPubKey(pubkey2));
75 BOOST_CHECK(key2C.VerifyPubKey(pubkey2C));
76
77 BOOST_CHECK(DecodeDestination(addr1) == CTxDestination(PKHash(pubkey1)));
78 BOOST_CHECK(DecodeDestination(addr2) == CTxDestination(PKHash(pubkey2)));
79 BOOST_CHECK(DecodeDestination(addr1C) == CTxDestination(PKHash(pubkey1C)));
80 BOOST_CHECK(DecodeDestination(addr2C) == CTxDestination(PKHash(pubkey2C)));
81
82 for (int n=0; n<16; n++)
83 {
84 std::string strMsg = strprintf("Very secret message %i: 11", n);
85 uint256 hashMsg = Hash(strMsg);
86
87 // normal signatures
88
89 std::vector<unsigned char> sign1, sign2, sign1C, sign2C;
90
91 BOOST_CHECK(key1.Sign (hashMsg, sign1));
92 BOOST_CHECK(key2.Sign (hashMsg, sign2));
93 BOOST_CHECK(key1C.Sign(hashMsg, sign1C));
94 BOOST_CHECK(key2C.Sign(hashMsg, sign2C));
95
96 BOOST_CHECK( pubkey1.Verify(hashMsg, sign1));
97 BOOST_CHECK(!pubkey1.Verify(hashMsg, sign2));
98 BOOST_CHECK( pubkey1.Verify(hashMsg, sign1C));
99 BOOST_CHECK(!pubkey1.Verify(hashMsg, sign2C));
100
101 BOOST_CHECK(!pubkey2.Verify(hashMsg, sign1));
102 BOOST_CHECK( pubkey2.Verify(hashMsg, sign2));
103 BOOST_CHECK(!pubkey2.Verify(hashMsg, sign1C));
104 BOOST_CHECK( pubkey2.Verify(hashMsg, sign2C));
105
106 BOOST_CHECK( pubkey1C.Verify(hashMsg, sign1));
107 BOOST_CHECK(!pubkey1C.Verify(hashMsg, sign2));
108 BOOST_CHECK( pubkey1C.Verify(hashMsg, sign1C));
109 BOOST_CHECK(!pubkey1C.Verify(hashMsg, sign2C));
110
111 BOOST_CHECK(!pubkey2C.Verify(hashMsg, sign1));
112 BOOST_CHECK( pubkey2C.Verify(hashMsg, sign2));
113 BOOST_CHECK(!pubkey2C.Verify(hashMsg, sign1C));
114 BOOST_CHECK( pubkey2C.Verify(hashMsg, sign2C));
115
116 // compact signatures (with key recovery)
117
118 std::vector<unsigned char> csign1, csign2, csign1C, csign2C;
119
120 BOOST_CHECK(key1.SignCompact (hashMsg, csign1));
121 BOOST_CHECK(key2.SignCompact (hashMsg, csign2));
122 BOOST_CHECK(key1C.SignCompact(hashMsg, csign1C));
123 BOOST_CHECK(key2C.SignCompact(hashMsg, csign2C));
124
125 CPubKey rkey1, rkey2, rkey1C, rkey2C;
126
127 BOOST_CHECK(rkey1.RecoverCompact (hashMsg, csign1));
128 BOOST_CHECK(rkey2.RecoverCompact (hashMsg, csign2));
129 BOOST_CHECK(rkey1C.RecoverCompact(hashMsg, csign1C));
130 BOOST_CHECK(rkey2C.RecoverCompact(hashMsg, csign2C));
131
132 BOOST_CHECK(rkey1 == pubkey1);
133 BOOST_CHECK(rkey2 == pubkey2);
134 BOOST_CHECK(rkey1C == pubkey1C);
135 BOOST_CHECK(rkey2C == pubkey2C);
136 }
137
138 // test deterministic signing
139
140 std::vector<unsigned char> detsig, detsigc;
141 std::string strMsg = "Very deterministic message";
142 uint256 hashMsg = Hash(strMsg);
143 BOOST_CHECK(key1.Sign(hashMsg, detsig));
144 BOOST_CHECK(key1C.Sign(hashMsg, detsigc));
145 BOOST_CHECK(detsig == detsigc);
146 BOOST_CHECK(detsig == ParseHex("304402205dbbddda71772d95ce91cd2d14b592cfbc1dd0aabd6a394b6c2d377bbe59d31d022014ddda21494a4e221f0824f0b8b924c43fa43c0ad57dccdaa11f81a6bd4582f6"));
147 BOOST_CHECK(key2.Sign(hashMsg, detsig));
148 BOOST_CHECK(key2C.Sign(hashMsg, detsigc));
149 BOOST_CHECK(detsig == detsigc);
150 BOOST_CHECK(detsig == ParseHex("3044022052d8a32079c11e79db95af63bb9600c5b04f21a9ca33dc129c2bfa8ac9dc1cd5022061d8ae5e0f6c1a16bde3719c64c2fd70e404b6428ab9a69566962e8771b5944d"));
151 BOOST_CHECK(key1.SignCompact(hashMsg, detsig));
152 BOOST_CHECK(key1C.SignCompact(hashMsg, detsigc));
153 BOOST_CHECK(detsig == ParseHex("1c5dbbddda71772d95ce91cd2d14b592cfbc1dd0aabd6a394b6c2d377bbe59d31d14ddda21494a4e221f0824f0b8b924c43fa43c0ad57dccdaa11f81a6bd4582f6"));
154 BOOST_CHECK(detsigc == ParseHex("205dbbddda71772d95ce91cd2d14b592cfbc1dd0aabd6a394b6c2d377bbe59d31d14ddda21494a4e221f0824f0b8b924c43fa43c0ad57dccdaa11f81a6bd4582f6"));
155 BOOST_CHECK(key2.SignCompact(hashMsg, detsig));
156 BOOST_CHECK(key2C.SignCompact(hashMsg, detsigc));
157 BOOST_CHECK(detsig == ParseHex("1c52d8a32079c11e79db95af63bb9600c5b04f21a9ca33dc129c2bfa8ac9dc1cd561d8ae5e0f6c1a16bde3719c64c2fd70e404b6428ab9a69566962e8771b5944d"));
158 BOOST_CHECK(detsigc == ParseHex("2052d8a32079c11e79db95af63bb9600c5b04f21a9ca33dc129c2bfa8ac9dc1cd561d8ae5e0f6c1a16bde3719c64c2fd70e404b6428ab9a69566962e8771b5944d"));
159}
160
161BOOST_AUTO_TEST_CASE(key_signature_tests)
162{
163 // When entropy is specified, we should see at least one high R signature within 20 signatures
164 CKey key = DecodeSecret(strSecret1);
165 std::string msg = "A message to be signed";
166 uint256 msg_hash = Hash(msg);
167 std::vector<unsigned char> sig;
168 bool found = false;
169
170 for (int i = 1; i <=20; ++i) {
171 sig.clear();
172 BOOST_CHECK(key.Sign(msg_hash, sig, false, i));
173 found = sig[3] == 0x21 && sig[4] == 0x00;
174 if (found) {
175 break;
176 }
177 }
178 BOOST_CHECK(found);
179
180 // When entropy is not specified, we should always see low R signatures that are less than or equal to 70 bytes in 256 tries
181 // The low R signatures should always have the value of their "length of R" byte less than or equal to 32
182 // We should see at least one signature that is less than 70 bytes.
183 bool found_small = false;
184 bool found_big = false;
185 bool bad_sign = false;
186 for (int i = 0; i < 256; ++i) {
187 sig.clear();
188 std::string msg = "A message to be signed" + ToString(i);
189 msg_hash = Hash(msg);
190 if (!key.Sign(msg_hash, sig)) {
191 bad_sign = true;
192 break;
193 }
194 // sig.size() > 70 implies sig[3] > 32, because S is always low.
195 // But check both conditions anyway, just in case this implication is broken for some reason
196 if (sig[3] > 32 || sig.size() > 70) {
197 found_big = true;
198 break;
199 }
200 found_small |= sig.size() < 70;
201 }
202 BOOST_CHECK(!bad_sign);
203 BOOST_CHECK(!found_big);
204 BOOST_CHECK(found_small);
205}
206
207static CPubKey UnserializePubkey(const std::vector<uint8_t>& data)
208{
209 DataStream stream{};
210 stream << data;
211 CPubKey pubkey;
212 stream >> pubkey;
213 return pubkey;
214}
215
216static unsigned int GetLen(unsigned char chHeader)
217{
218 if (chHeader == 2 || chHeader == 3)
219 return CPubKey::COMPRESSED_SIZE;
220 if (chHeader == 4 || chHeader == 6 || chHeader == 7)
221 return CPubKey::SIZE;
222 return 0;
223}
224
225static void CmpSerializationPubkey(const CPubKey& pubkey)
226{
227 DataStream stream{};
228 stream << pubkey;
229 CPubKey pubkey2;
230 stream >> pubkey2;
231 BOOST_CHECK(pubkey == pubkey2);
232}
233
234BOOST_AUTO_TEST_CASE(pubkey_unserialize)
235{
236 for (uint8_t i = 2; i <= 7; ++i) {
237 CPubKey key = UnserializePubkey({0x02});
238 BOOST_CHECK(!key.IsValid());
239 CmpSerializationPubkey(key);
240 key = UnserializePubkey(std::vector<uint8_t>(GetLen(i), i));
241 CmpSerializationPubkey(key);
242 if (i == 5) {
243 BOOST_CHECK(!key.IsValid());
244 } else {
245 BOOST_CHECK(key.IsValid());
246 }
247 }
248}
249
250BOOST_AUTO_TEST_CASE(bip340_test_vectors)
251{
252 static const std::vector<std::pair<std::array<std::string, 3>, bool>> VECTORS = {
253 {{"F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9", "0000000000000000000000000000000000000000000000000000000000000000", "E907831F80848D1069A5371B402410364BDF1C5F8307B0084C55F1CE2DCA821525F66A4A85EA8B71E482A74F382D2CE5EBEEE8FDB2172F477DF4900D310536C0"}, true},
254 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6896BD60EEAE296DB48A229FF71DFE071BDE413E6D43F917DC8DCF8C78DE33418906D11AC976ABCCB20B091292BFF4EA897EFCB639EA871CFA95F6DE339E4B0A"}, true},
255 {{"DD308AFEC5777E13121FA72B9CC1B7CC0139715309B086C960E18FD969774EB8", "7E2D58D8B3BCDF1ABADEC7829054F90DDA9805AAB56C77333024B9D0A508B75C", "5831AAEED7B44BB74E5EAB94BA9D4294C49BCF2A60728D8B4C200F50DD313C1BAB745879A5AD954A72C45A91C3A51D3C7ADEA98D82F8481E0E1E03674A6F3FB7"}, true},
256 {{"25D1DFF95105F5253C4022F628A996AD3A0D95FBF21D468A1B33F8C160D8F517", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "7EB0509757E246F19449885651611CB965ECC1A187DD51B64FDA1EDC9637D5EC97582B9CB13DB3933705B32BA982AF5AF25FD78881EBB32771FC5922EFC66EA3"}, true},
257 {{"D69C3509BB99E412E68B0FE8544E72837DFA30746D8BE2AA65975F29D22DC7B9", "4DF3C3F68FCC83B27E9D42C90431A72499F17875C81A599B566C9889B9696703", "00000000000000000000003B78CE563F89A0ED9414F5AA28AD0D96D6795F9C6376AFB1548AF603B3EB45C9F8207DEE1060CB71C04E80F593060B07D28308D7F4"}, true},
258 {{"EEFDEA4CDB677750A420FEE807EACF21EB9898AE79B9768766E4FAA04A2D4A34", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false},
259 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "FFF97BD5755EEEA420453A14355235D382F6472F8568A18B2F057A14602975563CC27944640AC607CD107AE10923D9EF7A73C643E166BE5EBEAFA34B1AC553E2"}, false},
260 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "1FA62E331EDBC21C394792D2AB1100A7B432B013DF3F6FF4F99FCB33E0E1515F28890B3EDB6E7189B630448B515CE4F8622A954CFE545735AAEA5134FCCDB2BD"}, false},
261 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769961764B3AA9B2FFCB6EF947B6887A226E8D7C93E00C5ED0C1834FF0D0C2E6DA6"}, false},
262 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "0000000000000000000000000000000000000000000000000000000000000000123DDA8328AF9C23A94C1FEECFD123BA4FB73476F0D594DCB65C6425BD186051"}, false},
263 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "00000000000000000000000000000000000000000000000000000000000000017615FBAF5AE28864013C099742DEADB4DBA87F11AC6754F93780D5A1837CF197"}, false},
264 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "4A298DACAE57395A15D0795DDBFD1DCB564DA82B0F269BC70A74F8220429BA1D69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false},
265 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false},
266 {{"DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141"}, false},
267 {{"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC30", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"}, false}
268 };
269
270 for (const auto& test : VECTORS) {
271 auto pubkey = ParseHex(test.first[0]);
272 auto msg = ParseHex(test.first[1]);
273 auto sig = ParseHex(test.first[2]);
274 BOOST_CHECK_EQUAL(XOnlyPubKey(pubkey).VerifySchnorr(uint256(msg), sig), test.second);
275 }
276
277 static const std::vector<std::array<std::string, 5>> SIGN_VECTORS = {
278 {{"0000000000000000000000000000000000000000000000000000000000000003", "F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9", "0000000000000000000000000000000000000000000000000000000000000000", "0000000000000000000000000000000000000000000000000000000000000000", "E907831F80848D1069A5371B402410364BDF1C5F8307B0084C55F1CE2DCA821525F66A4A85EA8B71E482A74F382D2CE5EBEEE8FDB2172F477DF4900D310536C0"}},
279 {{"B7E151628AED2A6ABF7158809CF4F3C762E7160F38B4DA56A784D9045190CFEF", "DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659", "0000000000000000000000000000000000000000000000000000000000000001", "243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89", "6896BD60EEAE296DB48A229FF71DFE071BDE413E6D43F917DC8DCF8C78DE33418906D11AC976ABCCB20B091292BFF4EA897EFCB639EA871CFA95F6DE339E4B0A"}},
280 {{"C90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B14E5C9", "DD308AFEC5777E13121FA72B9CC1B7CC0139715309B086C960E18FD969774EB8", "C87AA53824B4D7AE2EB035A2B5BBBCCC080E76CDC6D1692C4B0B62D798E6D906", "7E2D58D8B3BCDF1ABADEC7829054F90DDA9805AAB56C77333024B9D0A508B75C", "5831AAEED7B44BB74E5EAB94BA9D4294C49BCF2A60728D8B4C200F50DD313C1BAB745879A5AD954A72C45A91C3A51D3C7ADEA98D82F8481E0E1E03674A6F3FB7"}},
281 {{"0B432B2677937381AEF05BB02A66ECD012773062CF3FA2549E44F58ED2401710", "25D1DFF95105F5253C4022F628A996AD3A0D95FBF21D468A1B33F8C160D8F517", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "7EB0509757E246F19449885651611CB965ECC1A187DD51B64FDA1EDC9637D5EC97582B9CB13DB3933705B32BA982AF5AF25FD78881EBB32771FC5922EFC66EA3"}},
282 };
283
284 for (const auto& [sec_hex, pub_hex, aux_hex, msg_hex, sig_hex] : SIGN_VECTORS) {
285 auto sec = ParseHex(sec_hex);
286 auto pub = ParseHex(pub_hex);
287 uint256 aux256(ParseHex(aux_hex));
288 uint256 msg256(ParseHex(msg_hex));
289 auto sig = ParseHex(sig_hex);
290 unsigned char sig64[64];
291
292 // Run the untweaked test vectors above, comparing with exact expected signature.
293 CKey key;
294 key.Set(sec.begin(), sec.end(), true);
295 XOnlyPubKey pubkey(key.GetPubKey());
296 BOOST_CHECK(std::equal(pubkey.begin(), pubkey.end(), pub.begin(), pub.end()));
297 bool ok = key.SignSchnorr(msg256, sig64, nullptr, aux256);
298 BOOST_CHECK(ok);
299 BOOST_CHECK(std::vector<unsigned char>(sig64, sig64 + 64) == sig);
300 // Verify those signatures for good measure.
301 BOOST_CHECK(pubkey.VerifySchnorr(msg256, sig64));
302
303 // Repeat the same check, but use the KeyPair directly without any merkle tweak
304 KeyPair keypair = key.ComputeKeyPair(/*merkle_root=*/nullptr);
305 bool kp_ok = keypair.SignSchnorr(msg256, sig64, aux256);
306 BOOST_CHECK(kp_ok);
307 BOOST_CHECK(pubkey.VerifySchnorr(msg256, sig64));
308 BOOST_CHECK(std::vector<unsigned char>(sig64, sig64 + 64) == sig);
309
310 // Do 10 iterations where we sign with a random Merkle root to tweak,
311 // and compare against the resulting tweaked keys, with random aux.
312 // In iteration i=0 we tweak with empty Merkle tree.
313 for (int i = 0; i < 10; ++i) {
314 uint256 merkle_root;
315 if (i) merkle_root = InsecureRand256();
316 auto tweaked = pubkey.CreateTapTweak(i ? &merkle_root : nullptr);
317 BOOST_CHECK(tweaked);
318 XOnlyPubKey tweaked_key = tweaked->first;
319 aux256 = InsecureRand256();
320 bool ok = key.SignSchnorr(msg256, sig64, &merkle_root, aux256);
321 BOOST_CHECK(ok);
322 BOOST_CHECK(tweaked_key.VerifySchnorr(msg256, sig64));
323
324 // Repeat the same check, but use the KeyPair class directly
325 KeyPair keypair = key.ComputeKeyPair(&merkle_root);
326 bool kp_ok = keypair.SignSchnorr(msg256, sig64, aux256);
327 BOOST_CHECK(kp_ok);
328 BOOST_CHECK(tweaked_key.VerifySchnorr(msg256, sig64));
329 }
330 }
331}
332
333BOOST_AUTO_TEST_CASE(key_ellswift)
334{
335 for (const auto& secret : {strSecret1, strSecret2, strSecret1C, strSecret2C}) {
336 CKey key = DecodeSecret(secret);
337 BOOST_CHECK(key.IsValid());
338
339 uint256 ent32 = InsecureRand256();
340 auto ellswift = key.EllSwiftCreate(AsBytes(Span{ent32}));
341
342 CPubKey decoded_pubkey = ellswift.Decode();
343 if (!key.IsCompressed()) {
344 // The decoding constructor returns a compressed pubkey. If the
345 // original was uncompressed, we must decompress the decoded one
346 // to compare.
347 decoded_pubkey.Decompress();
348 }
349 BOOST_CHECK(key.GetPubKey() == decoded_pubkey);
350 }
351}
352
353BOOST_AUTO_TEST_CASE(bip341_test_h)
354{
355 std::vector<unsigned char> G_uncompressed = ParseHex("0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8");
356 HashWriter hw;
357 hw.write(MakeByteSpan(G_uncompressed));
358 XOnlyPubKey H{hw.GetSHA256()};
359 BOOST_CHECK(XOnlyPubKey::NUMS_H == H);
360}
361
362BOOST_AUTO_TEST_CASE(key_schnorr_tweak_smoke_test)
363{
364 // Sanity check to ensure we get the same tweak using CPubKey vs secp256k1 functions
365 secp256k1_context* secp256k1_context_sign = secp256k1_context_create(SECP256K1_CONTEXT_NONE);
366
367 CKey key;
368 key.MakeNewKey(true);
369 uint256 merkle_root = InsecureRand256();
370
371 // secp256k1 functions
372 secp256k1_keypair keypair;
373 BOOST_CHECK(secp256k1_keypair_create(secp256k1_context_sign, &keypair, UCharCast(key.begin())));
374 secp256k1_xonly_pubkey xonly_pubkey;
375 BOOST_CHECK(secp256k1_keypair_xonly_pub(secp256k1_context_sign, &xonly_pubkey, nullptr, &keypair));
376 unsigned char xonly_bytes[32];
377 BOOST_CHECK(secp256k1_xonly_pubkey_serialize(secp256k1_context_sign, xonly_bytes, &xonly_pubkey));
378 uint256 tweak_old = XOnlyPubKey(xonly_bytes).ComputeTapTweakHash(&merkle_root);
379
380 // CPubKey
381 CPubKey pubkey = key.GetPubKey();
382 uint256 tweak_new = XOnlyPubKey(pubkey).ComputeTapTweakHash(&merkle_root);
383
384 BOOST_CHECK_EQUAL(tweak_old, tweak_new);
385
386 secp256k1_context_destroy(secp256k1_context_sign);
387}
388
389BOOST_AUTO_TEST_SUITE_END()
CTxDestination
std::variant< CNoDestination, PubKeyDestination, PKHash, ScriptHash, WitnessV0ScriptHash, WitnessV0KeyHash, WitnessV1Taproot, PayToAnchor, WitnessUnknown > CTxDestination
A txout script categorized into standard templates.
Definition addresstype.h:140
CKey
An encapsulated private key.
Definition key.h:35
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
CKey::ComputeKeyPair
KeyPair ComputeKeyPair(const uint256 *merkle_root) const
Compute a KeyPair.
Definition key.cpp:347
CKey::IsValid
bool IsValid() const
Check whether this private key is valid.
Definition key.h:123
CKey::Sign
bool Sign(const uint256 &hash, std::vector< unsigned char > &vchSig, bool grind=true, uint32_t test_case=0) const
Create a DER-serialized signature.
Definition key.cpp:208
CKey::begin
const std::byte * begin() const
Definition key.h:119
CKey::IsCompressed
bool IsCompressed() const
Check whether the public key corresponding to this private key is (to be) compressed.
Definition key.h:126
CKey::MakeNewKey
void MakeNewKey(bool fCompressed)
Generate a new private key using a cryptographic PRNG.
Definition key.cpp:161
CKey::GetPubKey
CPubKey GetPubKey() const
Compute the public key from a private key.
Definition key.cpp:182
CKey::Set
void Set(const T pbegin, const T pend, bool fCompressedIn)
Initialize using begin and end iterators to byte data.
Definition key.h:103
CKey::VerifyPubKey
bool VerifyPubKey(const CPubKey &vchPubKey) const
Verify thoroughly whether a private key and a public key match.
Definition key.cpp:236
CKey::EllSwiftCreate
EllSwiftPubKey EllSwiftCreate(Span< const std::byte > entropy) const
Create an ellswift-encoded public key for this key, with specified entropy.
Definition key.cpp:311
CKey::SignCompact
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
CPubKey
An encapsulated public key.
Definition pubkey.h:34
CPubKey::RecoverCompact
bool RecoverCompact(const uint256 &hash, const std::vector< unsigned char > &vchSig)
Recover a public key from a compact signature.
Definition pubkey.cpp:296
CPubKey::COMPRESSED_SIZE
static constexpr unsigned int COMPRESSED_SIZE
Definition pubkey.h:40
CPubKey::IsValid
bool IsValid() const
Definition pubkey.h:189
CPubKey::Decompress
bool Decompress()
Turn this public key into an uncompressed public key.
Definition pubkey.cpp:323
CPubKey::Verify
bool Verify(const uint256 &hash, const std::vector< unsigned char > &vchSig) const
Verify a DER signature (~72 bytes).
Definition pubkey.cpp:279
CPubKey::SIZE
static constexpr unsigned int SIZE
secp256k1:
Definition pubkey.h:39
DataStream
Double ended buffer combining vector and stream-like interfaces.
Definition streams.h:147
HashWriter
A writer stream (for serialization) that computes a 256-bit hash.
Definition hash.h:101
HashWriter::write
void write(Span< const std::byte > src)
Definition hash.h:106
HashWriter::GetSHA256
uint256 GetSHA256()
Compute the SHA256 hash of all data written to this object.
Definition hash.h:126
KeyPair
KeyPair.
Definition key.h:268
KeyPair::SignSchnorr
bool SignSchnorr(const uint256 &hash, Span< unsigned char > sig, const uint256 &aux) const
Definition key.cpp:426
Span
A Span is an object that can refer to a contiguous sequence of objects.
Definition span.h:98
XOnlyPubKey::end
const unsigned char * end() const
Definition pubkey.h:296
XOnlyPubKey::begin
const unsigned char * begin() const
Definition pubkey.h:295
XOnlyPubKey::CreateTapTweak
std::optional< std::pair< XOnlyPubKey, bool > > CreateTapTweak(const uint256 *merkle_root) const
Construct a Taproot tweaked output point with this point as internal key.
Definition pubkey.cpp:261
XOnlyPubKey::VerifySchnorr
bool VerifySchnorr(const uint256 &msg, Span< const unsigned char > sigbytes) const
Verify a Schnorr signature against this public key.
Definition pubkey.cpp:232
XOnlyPubKey::NUMS_H
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:194
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:242
uint256
256-bit opaque blob.
Definition uint256.h:178
BOOST_AUTO_TEST_SUITE_END
BOOST_AUTO_TEST_SUITE_END()
Hash
uint256 Hash(const T &in1)
Compute the 256-bit hash of an object.
Definition hash.h:75
secp256k1_context_sign
static secp256k1_context * secp256k1_context_sign
Definition key.cpp:19
DecodeDestination
CTxDestination DecodeDestination(const std::string &str, std::string &error_msg, std::vector< int > *error_locations)
Definition key_io.cpp:296
DecodeSecret
CKey DecodeSecret(const std::string &str)
Definition key_io.cpp:213
key_io.h
strSecret2
static const std::string strSecret2
Definition key_tests.cpp:26
GetLen
static unsigned int GetLen(unsigned char chHeader)
Definition key_tests.cpp:216
addr1
static const std::string addr1
Definition key_tests.cpp:29
strSecret2C
static const std::string strSecret2C
Definition key_tests.cpp:28
CmpSerializationPubkey
static void CmpSerializationPubkey(const CPubKey &pubkey)
Definition key_tests.cpp:225
addr2C
static const std::string addr2C
Definition key_tests.cpp:32
UnserializePubkey
static CPubKey UnserializePubkey(const std::vector< uint8_t > &data)
Definition key_tests.cpp:207
addr1C
static const std::string addr1C
Definition key_tests.cpp:31
strSecret1
static const std::string strSecret1
Definition key_tests.cpp:25
strSecret1C
static const std::string strSecret1C
Definition key_tests.cpp:27
addr2
static const std::string addr2
Definition key_tests.cpp:30
BOOST_AUTO_TEST_CASE
BOOST_AUTO_TEST_CASE(key_test1)
Definition key_tests.cpp:39
strAddressBad
static const std::string strAddressBad
Definition key_tests.cpp:34
util::ToString
std::string ToString(const T &t)
Locale-independent version of std::to_string.
Definition string.h:156
BOOST_CHECK_EQUAL
#define BOOST_CHECK_EQUAL(v1, v2)
Definition object.cpp:18
BOOST_CHECK
#define BOOST_CHECK(expr)
Definition object.cpp:17
secp256k1_context_destroy
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
secp256k1_context_create
SECP256K1_API secp256k1_context * secp256k1_context_create(unsigned int flags) SECP256K1_WARN_UNUSED_RESULT
Create a secp256k1 context object (in dynamically allocated memory).
Definition secp256k1.c:141
SECP256K1_CONTEXT_NONE
#define SECP256K1_CONTEXT_NONE
Context flags to pass to secp256k1_context_create, secp256k1_context_preallocated_size,...
Definition secp256k1.h:205
secp256k1_extrakeys.h
secp256k1_xonly_pubkey_serialize
SECP256K1_API int secp256k1_xonly_pubkey_serialize(const secp256k1_context *ctx, unsigned char *output32, const secp256k1_xonly_pubkey *pubkey) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3)
Serialize an xonly_pubkey object into a 32-byte sequence.
Definition main_impl.h:44
secp256k1_keypair_create
SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_create(const secp256k1_context *ctx, secp256k1_keypair *keypair, const unsigned char *seckey) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3)
Compute the keypair for a secret key.
Definition main_impl.h:196
secp256k1_keypair_xonly_pub
SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_xonly_pub(const secp256k1_context *ctx, secp256k1_xonly_pubkey *pubkey, int *pk_parity, const secp256k1_keypair *keypair) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(4)
Get the x-only public key from a keypair.
Definition main_impl.h:234
setup_common.h
GetPubKey
static bool GetPubKey(const SigningProvider &provider, const SignatureData &sigdata, const CKeyID &address, CPubKey &pubkey)
Definition sign.cpp:109
MakeByteSpan
Span< const std::byte > MakeByteSpan(V &&v) noexcept
Definition span.h:277
AsBytes
Span< const std::byte > AsBytes(Span< T > s) noexcept
Definition span.h:266
UCharCast
unsigned char * UCharCast(char *c)
Definition span.h:288
ParseHex
std::vector< Byte > ParseHex(std::string_view hex_str)
Like TryParseHex, but returns an empty vector on invalid input.
Definition strencodings.h:66
BasicTestingSetup
Basic testing setup.
Definition setup_common.h:64
secp256k1_context_struct
Definition secp256k1.c:61
secp256k1_keypair
Opaque data structure that holds a keypair consisting of a secret and a public key.
Definition secp256k1_extrakeys.h:33
secp256k1_xonly_pubkey
Opaque data structure that holds a parsed and valid "x-only" public key.
Definition secp256k1_extrakeys.h:22
InsecureRand256
static uint256 InsecureRand256()
Definition random.h:35
strprintf
#define strprintf
Format arguments and return the string or write to given std::ostream (see tinyformat::format doc for...
Definition tinyformat.h:1161
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