diff options
| -rw-r--r-- | src/script/interpreter.cpp | 4 | ||||
| -rw-r--r-- | src/script/interpreter.h | 3 | ||||
| -rw-r--r-- | src/script/script.cpp | 2 | ||||
| -rw-r--r-- | src/script/script.h | 2 | ||||
| -rw-r--r-- | src/test/data/script_invalid.json | 18 | ||||
| -rw-r--r-- | src/test/data/script_valid.json | 12 | ||||
| -rw-r--r-- | src/test/script_tests.cpp | 23 | ||||
| -rw-r--r-- | src/test/transaction_tests.cpp | 1 |
8 files changed, 61 insertions, 4 deletions
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp index cd73b88210..e463de8cc2 100644 --- a/src/script/interpreter.cpp +++ b/src/script/interpreter.cpp @@ -980,6 +980,10 @@ bool SignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn, const vec bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, unsigned int flags, const BaseSignatureChecker& checker) { + if ((flags & SCRIPT_VERIFY_SIGPUSHONLY) != 0 && !scriptSig.IsPushOnly()) { + return false; + } + vector<vector<unsigned char> > stack, stackCopy; if (!EvalScript(stack, scriptSig, flags, checker)) return false; diff --git a/src/script/interpreter.h b/src/script/interpreter.h index de5ce2ced1..085cd867da 100644 --- a/src/script/interpreter.h +++ b/src/script/interpreter.h @@ -46,6 +46,9 @@ enum // verify dummy stack item consumed by CHECKMULTISIG is of zero-length (softfork safe, BIP62 rule 7). SCRIPT_VERIFY_NULLDUMMY = (1U << 4), + + // Using a non-push operator in the scriptSig causes script failure (softfork safe, BIP62 rule 2). + SCRIPT_VERIFY_SIGPUSHONLY = (1U << 5), }; uint256 SignatureHash(const CScript &scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType); diff --git a/src/script/script.cpp b/src/script/script.cpp index 3e19d0c2bf..bbcfe9dfdd 100644 --- a/src/script/script.cpp +++ b/src/script/script.cpp @@ -230,7 +230,7 @@ bool CScript::IsPushOnly() const return false; // Note that IsPushOnly() *does* consider OP_RESERVED to be a // push-type opcode, however execution of OP_RESERVED fails, so - // it's not relevant to P2SH as the scriptSig would fail prior to + // it's not relevant to P2SH/BIP62 as the scriptSig would fail prior to // the P2SH special validation code being executed. if (opcode > OP_16) return false; diff --git a/src/script/script.h b/src/script/script.h index d450db5cad..706a85a29b 100644 --- a/src/script/script.h +++ b/src/script/script.h @@ -551,7 +551,7 @@ public: bool IsPayToScriptHash() const; - // Called by IsStandardTx and P2SH VerifyScript (which makes it consensus-critical). + // Called by IsStandardTx and P2SH/BIP62 VerifyScript (which makes it consensus-critical). bool IsPushOnly() const; // Called by IsStandardTx. diff --git a/src/test/data/script_invalid.json b/src/test/data/script_invalid.json index b6447cb221..e4dd8fe9aa 100644 --- a/src/test/data/script_invalid.json +++ b/src/test/data/script_invalid.json @@ -504,6 +504,24 @@ nSequences are max. "NULLDUMMY", "3-of-3 NOT with invalid sig with nonzero dummy" ], +[ + "0 0x47 0x3044022035341cc377b19138f944f90c45772cb06338c6d56a4c0c31a65bf1a8a105fadc022046dd232850b6bacb25879c9da82a7a628982aa19d055f1753468f68047662e0301 DUP", + "2 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 2 CHECKMULTISIG", + "SIGPUSHONLY", + "2-of-2 with two identical keys and sigs pushed using OP_DUP" +], +[ + "0x47 0x304402204d8b99eea2f53382fd67e0dbc8ed0596bd614aa0dad6bc6843c7860c79b901c3022062f022a71993013e3d9b22302a8e4b40109d7bb057aeb250b9aab2197b3e96b801 0x23 0x2103363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640ac", + "0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 CHECKSIG", + "", + "P2SH(P2PK) with non-push scriptSig but no SIGPUSHONLY" +], +[ + "0x47 0x30440220078c887c33abc67fbbd827ceb3f661c1c459e78218161b652f23e3ca76cfabbd022047df245eacb8a88d8c5ca7b5228e3b4d070c102d2f542433362d3f443cd24eda01 0x23 0x2103363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640ac", + "0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 CHECKSIG", + "SIGPUSHONLY", + "P2SH(P2PK) with non-push scriptSig" +], ["The End"] ] diff --git a/src/test/data/script_valid.json b/src/test/data/script_valid.json index 88bec7238c..f7d1531698 100644 --- a/src/test/data/script_valid.json +++ b/src/test/data/script_valid.json @@ -649,6 +649,18 @@ nSequences are max. "", "3-of-3 NOT with invalid sig and nonzero dummy but no NULLDUMMY" ], +[ + "0 0x47 0x3044022002a27769ee33db258bdf7a3792e7da4143ec4001b551f73e6a190b8d1bde449d02206742c56ccd94a7a2e16ca52fc1ae4a0aa122b0014a867a80de104f9cb18e472c01 DUP", + "2 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 2 CHECKMULTISIG", + "", + "2-of-2 with two identical keys and sigs pushed using OP_DUP but no SIGPUSHONLY" +], +[ + "0 0x47 0x304402203acf75dd59bbef171aeeedae4f1020b824195820db82575c2b323b8899f95de9022067df297d3a5fad049ba0bb81255d0e495643cbcf9abae9e396988618bc0c6dfe01 0x47 0x304402205f8b859230c1cab7d4e8de38ff244d2ebe046b64e8d3f4219b01e483c203490a022071bdc488e31b557f7d9e5c8a8bec90dc92289ca70fa317685f4f140e38b30c4601", + "2 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 2 CHECKMULTISIG", + "SIGPUSHONLY", + "2-of-2 with two identical keys and sigs pushed" +], ["The End"] ] diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp index d3fc673a79..0729119017 100644 --- a/src/test/script_tests.cpp +++ b/src/test/script_tests.cpp @@ -1,5 +1,5 @@ -// Copyright (c) 2011-2013 The Bitcoin Core developers -// Distributed under the MIT/X11 software license, see the accompanying +// Copyright (c) 2011-2014 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. #include "data/script_invalid.json.h" @@ -171,12 +171,14 @@ public: TestBuilder& Add(const CScript& script) { + DoPush(); spendTx.vin[0].scriptSig += script; return *this; } TestBuilder& Num(int num) { + DoPush(); spendTx.vin[0].scriptSig << CScriptNum(num); return *this; } @@ -402,6 +404,23 @@ BOOST_AUTO_TEST_CASE(script_build) "3-of-3 NOT with invalid sig with nonzero dummy", SCRIPT_VERIFY_NULLDUMMY ).Num(1).PushSig(keys.key0).PushSig(keys.key1).PushSig(keys.key2).DamagePush(10)); + good.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey1C) << OP_2 << OP_CHECKMULTISIG, + "2-of-2 with two identical keys and sigs pushed using OP_DUP but no SIGPUSHONLY", 0 + ).Num(0).PushSig(keys.key1).Add(CScript() << OP_DUP)); + bad.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey1C) << OP_2 << OP_CHECKMULTISIG, + "2-of-2 with two identical keys and sigs pushed using OP_DUP", SCRIPT_VERIFY_SIGPUSHONLY + ).Num(0).PushSig(keys.key1).Add(CScript() << OP_DUP)); + bad.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG, + "P2SH(P2PK) with non-push scriptSig but no SIGPUSHONLY", 0 + ).PushSig(keys.key2).PushRedeem()); + bad.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey2C) << OP_CHECKSIG, + "P2SH(P2PK) with non-push scriptSig", SCRIPT_VERIFY_SIGPUSHONLY + ).PushSig(keys.key2).PushRedeem()); + good.push_back(TestBuilder(CScript() << OP_2 << ToByteVector(keys.pubkey1C) << ToByteVector(keys.pubkey1C) << OP_2 << OP_CHECKMULTISIG, + "2-of-2 with two identical keys and sigs pushed", SCRIPT_VERIFY_SIGPUSHONLY + ).Num(0).PushSig(keys.key1).PushSig(keys.key1)); + + std::map<std::string, Array> tests_good; std::map<std::string, Array> tests_bad; diff --git a/src/test/transaction_tests.cpp b/src/test/transaction_tests.cpp index 41ccaaac94..9209c6697f 100644 --- a/src/test/transaction_tests.cpp +++ b/src/test/transaction_tests.cpp @@ -33,6 +33,7 @@ static std::map<string, unsigned int> mapFlagNames = boost::assign::map_list_of (string("STRICTENC"), (unsigned int)SCRIPT_VERIFY_STRICTENC) (string("DERSIG"), (unsigned int)SCRIPT_VERIFY_DERSIG) (string("LOW_S"), (unsigned int)SCRIPT_VERIFY_LOW_S) + (string("SIGPUSHONLY"), (unsigned int)SCRIPT_VERIFY_SIGPUSHONLY) (string("NULLDUMMY"), (unsigned int)SCRIPT_VERIFY_NULLDUMMY); unsigned int ParseScriptFlags(string strFlags) |