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Merge pull request #4960
8138cbe Add automatic script test generation, and actual checksig tests (Pieter Wuille)
2 parents 28fb5f3 + 8138cbe commit 2884b9a

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+413
-49
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8 files changed

+413
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‎src/core_io.h‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -20,6 +20,7 @@ extern uint256 ParseHashUV(const UniValue& v, const std::string& strName);
2020
extern std::vector<unsigned char> ParseHexUV(const UniValue& v, const std::string& strName);
2121

2222
// core_write.cpp
23+
extern std::string FormatScript(const CScript& script);
2324
extern std::string EncodeHexTx(const CTransaction& tx);
2425
extern void ScriptPubKeyToUniv(const CScript& scriptPubKey,
2526
UniValue& out, bool fIncludeHex);

‎src/core_write.cpp‎

Lines changed: 35 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -17,6 +17,41 @@
1717

1818
using namespace std;
1919

20+
string FormatScript(const CScript& script)
21+
{
22+
string ret;
23+
CScript::const_iterator it = script.begin();
24+
opcodetype op;
25+
while (it != script.end()) {
26+
CScript::const_iterator it2 = it;
27+
vector<unsigned char> vch;
28+
if (script.GetOp2(it, op, &vch)) {
29+
if (op == OP_0) {
30+
ret += "0 ";
31+
continue;
32+
} else if ((op >= OP_1 && op <= OP_16) || op == OP_1NEGATE) {
33+
ret += strprintf("%i ", op - OP_1NEGATE - 1);
34+
continue;
35+
} else if (op >= OP_NOP && op <= OP_CHECKMULTISIGVERIFY) {
36+
string str(GetOpName(op));
37+
if (str.substr(0, 3) == string("OP_")) {
38+
ret += str.substr(3, string::npos) + " ";
39+
continue;
40+
}
41+
}
42+
if (vch.size() > 0) {
43+
ret += strprintf("0x%x 0x%x ", HexStr(it2, it - vch.size()), HexStr(it - vch.size(), it));
44+
} else {
45+
ret += strprintf("0x%x", HexStr(it2, it));
46+
}
47+
continue;
48+
}
49+
ret += strprintf("0x%x ", HexStr(it2, script.end()));
50+
break;
51+
}
52+
return ret.substr(0, ret.size() - 1);
53+
}
54+
2055
string EncodeHexTx(const CTransaction& tx)
2156
{
2257
CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);

‎src/key.cpp‎

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -220,7 +220,7 @@ class CECKey {
220220
return o2i_ECPublicKey(&pkey, &pbegin, pubkey.size()) != NULL;
221221
}
222222

223-
bool Sign(const uint256 &hash, std::vector<unsigned char>& vchSig) {
223+
bool Sign(const uint256 &hash, std::vector<unsigned char>& vchSig, bool lowS) {
224224
vchSig.clear();
225225
ECDSA_SIG *sig = ECDSA_do_sign((unsigned char*)&hash, sizeof(hash), pkey);
226226
if (sig == NULL)
@@ -232,7 +232,7 @@ class CECKey {
232232
BIGNUM *halforder = BN_CTX_get(ctx);
233233
EC_GROUP_get_order(group, order, ctx);
234234
BN_rshift1(halforder, order);
235-
if (BN_cmp(sig->s, halforder) > 0) {
235+
if (lowS && BN_cmp(sig->s, halforder) > 0) {
236236
// enforce low S values, by negating the value (modulo the order) if above order/2.
237237
BN_sub(sig->s, order, sig->s);
238238
}
@@ -467,7 +467,7 @@ CPubKey CKey::GetPubKey() const {
467467
return pubkey;
468468
}
469469

470-
bool CKey::Sign(const uint256 &hash, std::vector<unsigned char>& vchSig) const {
470+
bool CKey::Sign(const uint256 &hash, std::vector<unsigned char>& vchSig, bool lowS) const {
471471
if (!fValid)
472472
return false;
473473
#ifdef USE_SECP256K1
@@ -484,7 +484,7 @@ bool CKey::Sign(const uint256 &hash, std::vector<unsigned char>& vchSig) const {
484484
#else
485485
CECKey key;
486486
key.SetSecretBytes(vch);
487-
return key.Sign(hash, vchSig);
487+
return key.Sign(hash, vchSig, lowS);
488488
#endif
489489
}
490490

‎src/key.h‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -276,7 +276,7 @@ class CKey
276276
CPubKey GetPubKey() const;
277277

278278
// Create a DER-serialized signature.
279-
bool Sign(const uint256& hash, std::vector<unsigned char>& vchSig) const;
279+
bool Sign(const uint256& hash, std::vector<unsigned char>& vchSig, bool lowS = true) const;
280280

281281
// Create a compact signature (65 bytes), which allows reconstructing the used public key.
282282
// The format is one header byte, followed by two times 32 bytes for the serialized r and s values.

‎src/test/data/script_invalid.json‎

Lines changed: 12 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -384,18 +384,18 @@ nSequences are max.
384384

385385
["0x00", "'00' EQUAL", "P2SH,STRICTENC", "Basic OP_0 execution"],
386386

387-
["0x48 0x3045022100ea4d62e1fb351ad977596457bb01dfce58e050541784277bd825c33bd98c2a9502203003347cf04573be4dc786c3fc5e7db09821565bf45c7d60160709b962f0398401 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798", "DUP HASH160 0x14 0x751e76e8199196d454941c45d1b3a323f1433bd6 EQUALVERIFY CHECKSIG", "P2SH,STRICTENC", "Normal pay to pubkeyhash with wrong signature"],
388-
["0x47 0x304402207d09de5e34968c3f8b27d8217f173629f1106ee5216aa11d6b1f9813b3a214060220610a6ed25c704f901c6278f4f57fb11eadefdf0b22df298cfb6ce7ea84c86bf401 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798", "DUP HASH160 0x14 0x751e76e8199196d454941c45d1b3a323f1433bd6 EQUALVERIFY CHECKSIG", "P2SH,STRICTENC", "Normal pay to pubkeyhash using an anyonecanpay sighash"],
389-
["0x47 0x3044022028686fb3c8d3e5068cc9924c494fb5026df201d23340896da62fe9bb73fd9d5f02202a239609524959c4ca3651fd0cc48245b0b240862146fc579f3a962a4f46942b01", "0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 CHECKSIG", "P2SH,STRICTENC", "Normal pay to pubkey with wrong signature"],
390-
["0x47 0x3044022054cb0a3fca8694a0c231848ed9f965078148fd653e49dd4b6981fadac0f5ba0702204085be5af427d4561f13a07fd5a1c5ab0ff02126e9ba191448f5a9dae0da585301 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 0x19 0x76a914751e76e8199196d454941c45d1b3a323f1433bd688ac", "HASH160 0x14 0xcd7b44d0b03f2d026d1e586d7ae18903b0d385f6 EQUAL", "P2SH,STRICTENC", "P2SH with a pay to pubkeyhash inside with wrong signature"],
391-
["0 0x48 0x3045022100e1c4e8800bd00c9ec3cd3df0e53e63bc5e8c018d0b68099a652f0b121f1a7e020220108dab275be7d1358530d3451d48aed747af77cc54e0423cbae5c572b2e1abb801", "1 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 1 CHECKMULTISIG", "P2SH,STRICTENC", "Raw multisig with one pubkey with wrong signature"],
392-
["0x49 0x304602220000ea4d62e1fb351ad977596457bb01dfce58e050541774277bd825c33bd98c2a9502203003347cf04573be4dc786c3fc5e7db09821565bf45c7d60160709b962f0398401 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798", "DUP HASH160 0x14 0x751e76e8199196d454941c45d1b3a323f1433bd6 EQUALVERIFY CHECKSIG", "P2SH,STRICTENC", "Normal pay to pubkeyhash with non-DER signature (too much R padding)"],
393-
["0x47 0x30440220ea4d62e1fb351ad977596457bb01dfce58e050541774277bd825c33bd98c2a9502203003347cf04573be4dc786c3fc5e7db09821565bf45c7d60160709b962f0398401 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798", "DUP HASH160 0x14 0x751e76e8199196d454941c45d1b3a323f1433bd6 EQUALVERIFY CHECKSIG", "P2SH,STRICTENC", "Normal pay to pubkeyhash with non-DER signature (too little R padding)"],
394-
["0x49 0x3046022100ea4d62e1fb351ad977596457bb01dfce58e050541774277bd825c33bd98c2a950221003003347cf04573be4dc786c3fc5e7db09821565bf45c7d60160709b962f0398401 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798", "DUP HASH160 0x14 0x751e76e8199196d454941c45d1b3a323f1433bd6 EQUALVERIFY CHECKSIG", "P2SH,STRICTENC", "Normal pay to pubkeyhash with non-DER signature (too much S padding)"],
395-
["0x48 0x3045022100e6eda3fd34862078233463cae19f0b47995e3f892102e5b175175e92a9163cc402204bf58445819093638481084322b61a2d49b68c96fd6fea17ed494722d0d67b4f01", "0x41 0x0679be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 CHECKSIG", "P2SH,STRICTENC", "Pay to pubkey with hybrid pubkey encoding"],
396-
["0x48 0x304502203b56d65863e0cdb89313043c2402f46f518c31658648151b01ec6b5b6c89206a022100d71efefb4c24fab36abb44ade106963d8114c5af1bda033faa1923f54ec4ea6a01", "0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 CHECKSIG", "P2SH,STRICTENC,LOW_S", "Pay to pubkey with high S"],
397-
["0x47 0x3044022054cb0a3fca8694a0c231848fd9f965078148fd653e49dd4b6980fadac0f5ba0702204085be5af427d4561f13a07fd5a1c5ab0ff02126e9ba191448f5a9dae0da585301 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 0x19 0x76a914751e76e8199196d454941c45d1b3a323f1433bd688ac", "HASH160 0x14 0xcd7b44d0b03f2d026d1e586d7ae18903b0d385f6 EQUAL", "P2SH,STRICTENC", "P2SH with a pay to pubkeyhash inside with invalid signature"],
398-
["1 0x48 0x3045022100e1c4e8800bd00c9ec3cd3de0e53e63bc5e8c018d0b68099a652f0b121f1a7e020220108dab275be7d1358530d3451d48aed747af77cc54e0423cbae5c572b2e1abb801", "1 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 1 CHECKMULTISIG", "P2SH,STRICTENC,NULLDUMMY", "Raw multisig with one pubkey with non-zero dummy"],
387+
["0x47 0x30440220304eff7556bba9560df47873275e64db45f3cd735998ce3f00d2e57b1bb5f31302205c0c9d14b8b80d43e2ac9b87532f1af6d8a3271262bc694ec4e14068392bb0a001", "0x41 0x0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 CHECKSIG", "", "P2PK, bad sig"],
388+
["0x47 0x3044022037fcdb8e08f41e27588de8bc036d2c4b16eb3d09c1ba53b8f47a0a9c27722a39022058664b7a53b507e71dfafb77193e3786c3f0c119d78ce9104480ee7ece04f09301 0x21 0x03363d90d446b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640", "DUP HASH160 0x14 0xc0834c0c158f53be706d234c38fd52de7eece656 EQUALVERIFY CHECKSIG", "", "P2PKH, bad pubkey"],
389+
["0x47 0x3044022035e5b6742d299861c84cebaf2ea64145ee427a95facab39e2594d6deebb0c1d602200acb16778faa2e467a59006f342f2535b1418d55ba63a8605b387b7f9ac86d9a01", "0x41 0x048282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f5150811f8a8098557dfe45e8256e830b60ace62d613ac2f7b17bed31b6eaff6e26caf CHECKSIG", "", "P2PK anyonecanpay marked with normal hashtype"],
390+
["0x47 0x3044022029b2b8765ca950cf75a69e80b73b7ddfcaa8b27080c2db4c23b36aae60688e790220598ff368e17872ee065aa54d7d3a590682ca5204325b23b31d7da3c4a21ae67901 0x23 0x210279be667ef9dcbbac54a06295ce870b07029bfcdb2dce28d959f2815b16f81798ac", "HASH160 0x14 0x23b0ad3477f2178bc0b3eed26e4e6316f4e83aa1 EQUAL", "P2SH", "P2SH(P2PK), bad redeemscript"],
391+
["0x47 0x30440220647f906e63890df5ef1d3fed47ba892b31976c634281079e2bd38504fb54a1fb022021e8811f38fbe90efb6b74cb78da01d9badbac3bafdf70a861d7538a220d0b2601 0x19 0x76a9147cf9c846cd4882efec4bf07e44ebdad495c94f4b88ac", "HASH160 0x14 0x2df519943d5acc0ef5222091f9dfe3543f489a82 EQUAL", "P2SH", "P2SH(P2PKH), bad sig"],
392+
["0 0x47 0x304402203ef170402f8887f2ac183f31b1f503b0bc60bfc968dd469b097ea6124aefac5002200612febadc4e4cacc086982cb85830a17af3680c1b6a3cf77c1708af7621cf1301 0 0x47 0x304402207821838251a24a2234844f68e7169e6d11945cdf052ea12bd3e4e37457aceb4402200b6b46c81361e314c740ae5133c072af5fa5c209d65d2db1679e1716f19a538101", "3 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 3 CHECKMULTISIG", "", "3-of-3, 2 sigs"],
393+
["0 0 0x47 0x304402204661f7795e8db7be3132e8974e9a76d1d24b31f23df94c6fbcea07d1c205789102203f5e45a1c0b085279b58d11b36d5fea5449c3cf16f844ad10124e9b65e8777d201 0x4c69 0x52210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f8179821038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f515082103363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff464053ae", "HASH160 0x14 0xc9e4a896d149702d0d1695434feddd52e24ad78d EQUAL", "P2SH", "P2SH(2-of-3), 1 sig"],
394+
["0x47 0x304402200052bc1600ca45c71f3538720fe62a5e8548dffd137af04467598c98466e9c0a0220789318ddbc9991ee477974089220a2feb6a6298a7c93d5ff6c25a92a2f4b48d501", "0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 CHECKSIG", "STRICTENC", "P2PK with too much R padding"],
395+
["0x48 0x304502206eb7b92628bfb3c4d2a04b65b986987bcbb1af4fceedb144d5a0437b7ee410590221005f57a52df4aa26366742eed0db182fce51fbcd7159011b0644a7c05943eb228901", "0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 CHECKSIG", "STRICTENC", "P2PK with too much S padding"],
396+
["0x47 0x30440220d8ad1efd55a3d2b8896495c38aba72056e1b3ca4a6ca15760e843eb1a9b9907602203eb0e8f3d6bec998262dfd03eaeb0f31c4e5105965436dec77550724b3771f3201", "0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 CHECKSIG", "STRICTENC", "P2PK with too little R padding"],
397+
["0x48 0x304502206c43e065c8a8db3bbe69015afb86a51fb2fc8870defd41d436da2a197d9d6c12022100fcec35816ee2d84ec271ad159fcabf5dd712157051169e48ac328a7818cdb51e01", "0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 CHECKSIG", "LOW_S,STRICTENC", "P2PK with high S"],
398+
["0x01 0x01 0x47 0x304402200e48ba1cf4d7182db94ffb57bd72ea31b5545dc0d1c512e665779b4fb2badc52022054b8388dfc074c708a75b62359b7be46402751ee40c0a111aef38a837b6ed09801 0x47 0x304402201c9820f59c49107bb30e6175cfc9ec95f897b03beb628b4bc854d2b80392aa0602200235d986ae418bcd111b8814f4c26a0ab5f475fb542a44884fc14912a97a252301 0x47 0x304402204cd7894c6f10a871f5b0c1f9c13228f8cdd4050248f0d0f498ee86be69ee3080022051bd2932c7d585eb600c7194235c74da820935f0d67972fd9545673aa1fd023301", "3 0x21 0x0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 3 CHECKMULTISIG", "NULLDUMMY", "3-of-3 with nonzero dummy"],
399399

400400
["The End"]
401401

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