aboutsummaryrefslogtreecommitdiff
path: root/src/script
diff options
context:
space:
mode:
Diffstat (limited to 'src/script')
-rw-r--r--src/script/bitcoinconsensus.cpp8
-rw-r--r--src/script/bitcoinconsensus.h2
-rw-r--r--src/script/interpreter.cpp64
-rw-r--r--src/script/interpreter.h18
-rw-r--r--src/script/ismine.cpp16
-rw-r--r--src/script/script.cpp23
-rw-r--r--src/script/script.h45
-rw-r--r--src/script/script_error.cpp2
-rw-r--r--src/script/sigcache.cpp36
-rw-r--r--src/script/sigcache.h27
-rw-r--r--src/script/sign.cpp46
-rw-r--r--src/script/sign.h14
-rw-r--r--src/script/standard.cpp87
-rw-r--r--src/script/standard.h102
14 files changed, 327 insertions, 163 deletions
diff --git a/src/script/bitcoinconsensus.cpp b/src/script/bitcoinconsensus.cpp
index c4ab441e2c..03128917fd 100644
--- a/src/script/bitcoinconsensus.cpp
+++ b/src/script/bitcoinconsensus.cpp
@@ -28,10 +28,10 @@ public:
if (nSize > m_remaining)
throw std::ios_base::failure(std::string(__func__) + ": end of data");
- if (pch == NULL)
+ if (pch == nullptr)
throw std::ios_base::failure(std::string(__func__) + ": bad destination buffer");
- if (m_data == NULL)
+ if (m_data == nullptr)
throw std::ios_base::failure(std::string(__func__) + ": bad source buffer");
memcpy(pch, m_data, nSize);
@@ -68,7 +68,7 @@ struct ECCryptoClosure
};
ECCryptoClosure instance_of_eccryptoclosure;
-}
+} // namespace
/** Check that all specified flags are part of the libconsensus interface. */
static bool verify_flags(unsigned int flags)
@@ -95,7 +95,7 @@ static int verify_script(const unsigned char *scriptPubKey, unsigned int scriptP
set_error(err, bitcoinconsensus_ERR_OK);
PrecomputedTransactionData txdata(tx);
- return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), &tx.vin[nIn].scriptWitness, flags, TransactionSignatureChecker(&tx, nIn, amount, txdata), NULL);
+ return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), &tx.vin[nIn].scriptWitness, flags, TransactionSignatureChecker(&tx, nIn, amount, txdata), nullptr);
} catch (const std::exception&) {
return set_error(err, bitcoinconsensus_ERR_TX_DESERIALIZE); // Error deserializing
}
diff --git a/src/script/bitcoinconsensus.h b/src/script/bitcoinconsensus.h
index 1bef4fe9e9..33bf80e5a7 100644
--- a/src/script/bitcoinconsensus.h
+++ b/src/script/bitcoinconsensus.h
@@ -63,7 +63,7 @@ enum
/// Returns 1 if the input nIn of the serialized transaction pointed to by
/// txTo correctly spends the scriptPubKey pointed to by scriptPubKey under
/// the additional constraints specified by flags.
-/// If not NULL, err will contain an error/success code for the operation
+/// If not nullptr, err will contain an error/success code for the operation
EXPORT_SYMBOL int bitcoinconsensus_verify_script(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen,
const unsigned char *txTo , unsigned int txToLen,
unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err);
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index 7d5d2092f8..2f7b8e3a03 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -13,9 +13,7 @@
#include "script/script.h"
#include "uint256.h"
-using namespace std;
-
-typedef vector<unsigned char> valtype;
+typedef std::vector<unsigned char> valtype;
namespace {
@@ -33,7 +31,7 @@ inline bool set_error(ScriptError* ret, const ScriptError serror)
return false;
}
-} // anon namespace
+} // namespace
bool CastToBool(const valtype& vch)
{
@@ -56,10 +54,10 @@ bool CastToBool(const valtype& vch)
*/
#define stacktop(i) (stack.at(stack.size()+(i)))
#define altstacktop(i) (altstack.at(altstack.size()+(i)))
-static inline void popstack(vector<valtype>& stack)
+static inline void popstack(std::vector<valtype>& stack)
{
if (stack.empty())
- throw runtime_error("popstack(): stack empty");
+ throw std::runtime_error("popstack(): stack empty");
stack.pop_back();
}
@@ -194,7 +192,7 @@ bool static IsDefinedHashtypeSignature(const valtype &vchSig) {
return true;
}
-bool CheckSignatureEncoding(const vector<unsigned char> &vchSig, unsigned int flags, ScriptError* serror) {
+bool CheckSignatureEncoding(const std::vector<unsigned char> &vchSig, unsigned int flags, ScriptError* serror) {
// Empty signature. Not strictly DER encoded, but allowed to provide a
// compact way to provide an invalid signature for use with CHECK(MULTI)SIG
if (vchSig.size() == 0) {
@@ -245,14 +243,14 @@ bool static CheckMinimalPush(const valtype& data, opcodetype opcode) {
return true;
}
-bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptError* serror)
+bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptError* serror)
{
static const CScriptNum bnZero(0);
static const CScriptNum bnOne(1);
- static const CScriptNum bnFalse(0);
- static const CScriptNum bnTrue(1);
+ // static const CScriptNum bnFalse(0);
+ // static const CScriptNum bnTrue(1);
static const valtype vchFalse(0);
- static const valtype vchZero(0);
+ // static const valtype vchZero(0);
static const valtype vchTrue(1, 1);
CScript::const_iterator pc = script.begin();
@@ -260,8 +258,8 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, un
CScript::const_iterator pbegincodehash = script.begin();
opcodetype opcode;
valtype vchPushValue;
- vector<bool> vfExec;
- vector<valtype> altstack;
+ std::vector<bool> vfExec;
+ std::vector<valtype> altstack;
set_error(serror, SCRIPT_ERR_UNKNOWN_ERROR);
if (script.size() > MAX_SCRIPT_SIZE)
return set_error(serror, SCRIPT_ERR_SCRIPT_SIZE);
@@ -1030,7 +1028,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, un
}
// Size limits
- if (stack.size() + altstack.size() > 1000)
+ if (stack.size() + altstack.size() > MAX_STACK_SIZE)
return set_error(serror, SCRIPT_ERR_STACK_SIZE);
}
}
@@ -1101,7 +1099,7 @@ public:
// Serialize the script
if (nInput != nIn)
// Blank out other inputs' signatures
- ::Serialize(s, CScriptBase());
+ ::Serialize(s, CScript());
else
SerializeScriptCode(s);
// Serialize the nSequence
@@ -1144,29 +1142,29 @@ public:
uint256 GetPrevoutHash(const CTransaction& txTo) {
CHashWriter ss(SER_GETHASH, 0);
- for (unsigned int n = 0; n < txTo.vin.size(); n++) {
- ss << txTo.vin[n].prevout;
+ for (const auto& txin : txTo.vin) {
+ ss << txin.prevout;
}
return ss.GetHash();
}
uint256 GetSequenceHash(const CTransaction& txTo) {
CHashWriter ss(SER_GETHASH, 0);
- for (unsigned int n = 0; n < txTo.vin.size(); n++) {
- ss << txTo.vin[n].nSequence;
+ for (const auto& txin : txTo.vin) {
+ ss << txin.nSequence;
}
return ss.GetHash();
}
uint256 GetOutputsHash(const CTransaction& txTo) {
CHashWriter ss(SER_GETHASH, 0);
- for (unsigned int n = 0; n < txTo.vout.size(); n++) {
- ss << txTo.vout[n];
+ for (const auto& txout : txTo.vout) {
+ ss << txout;
}
return ss.GetHash();
}
-} // anon namespace
+} // namespace
PrecomputedTransactionData::PrecomputedTransactionData(const CTransaction& txTo)
{
@@ -1181,6 +1179,8 @@ PrecomputedTransactionData::PrecomputedTransactionData(const CTransaction& txTo)
uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, const CAmount& amount, SigVersion sigversion, const PrecomputedTransactionData* cache)
{
+ assert(nIn < txTo.vin.size());
+
if (sigversion == SIGVERSION_WITNESS_V0) {
uint256 hashPrevouts;
uint256 hashSequence;
@@ -1214,7 +1214,7 @@ uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsig
// The prevout may already be contained in hashPrevout, and the nSequence
// may already be contain in hashSequence.
ss << txTo.vin[nIn].prevout;
- ss << static_cast<const CScriptBase&>(scriptCode);
+ ss << scriptCode;
ss << amount;
ss << txTo.vin[nIn].nSequence;
// Outputs (none/one/all, depending on flags)
@@ -1228,10 +1228,6 @@ uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsig
}
static const uint256 one(uint256S("0000000000000000000000000000000000000000000000000000000000000001"));
- if (nIn >= txTo.vin.size()) {
- // nIn out of range
- return one;
- }
// Check for invalid use of SIGHASH_SINGLE
if ((nHashType & 0x1f) == SIGHASH_SINGLE) {
@@ -1255,14 +1251,14 @@ bool TransactionSignatureChecker::VerifySignature(const std::vector<unsigned cha
return pubkey.Verify(sighash, vchSig);
}
-bool TransactionSignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn, const vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const
+bool TransactionSignatureChecker::CheckSig(const std::vector<unsigned char>& vchSigIn, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const
{
CPubKey pubkey(vchPubKey);
if (!pubkey.IsValid())
return false;
// Hash type is one byte tacked on to the end of the signature
- vector<unsigned char> vchSig(vchSigIn);
+ std::vector<unsigned char> vchSig(vchSigIn);
if (vchSig.empty())
return false;
int nHashType = vchSig.back();
@@ -1360,7 +1356,7 @@ bool TransactionSignatureChecker::CheckSequence(const CScriptNum& nSequence) con
static bool VerifyWitnessProgram(const CScriptWitness& witness, int witversion, const std::vector<unsigned char>& program, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* serror)
{
- vector<vector<unsigned char> > stack;
+ std::vector<std::vector<unsigned char> > stack;
CScript scriptPubKey;
if (witversion == 0) {
@@ -1373,7 +1369,7 @@ static bool VerifyWitnessProgram(const CScriptWitness& witness, int witversion,
stack = std::vector<std::vector<unsigned char> >(witness.stack.begin(), witness.stack.end() - 1);
uint256 hashScriptPubKey;
CSHA256().Write(&scriptPubKey[0], scriptPubKey.size()).Finalize(hashScriptPubKey.begin());
- if (memcmp(hashScriptPubKey.begin(), &program[0], 32)) {
+ if (memcmp(hashScriptPubKey.begin(), program.data(), 32)) {
return set_error(serror, SCRIPT_ERR_WITNESS_PROGRAM_MISMATCH);
}
} else if (program.size() == 20) {
@@ -1414,7 +1410,7 @@ static bool VerifyWitnessProgram(const CScriptWitness& witness, int witversion,
bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CScriptWitness* witness, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* serror)
{
static const CScriptWitness emptyWitness;
- if (witness == NULL) {
+ if (witness == nullptr) {
witness = &emptyWitness;
}
bool hadWitness = false;
@@ -1425,7 +1421,7 @@ bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const C
return set_error(serror, SCRIPT_ERR_SIG_PUSHONLY);
}
- vector<vector<unsigned char> > stack, stackCopy;
+ std::vector<std::vector<unsigned char> > stack, stackCopy;
if (!EvalScript(stack, scriptSig, flags, checker, SIGVERSION_BASE, serror))
// serror is set
return false;
@@ -1563,7 +1559,7 @@ size_t CountWitnessSigOps(const CScript& scriptSig, const CScript& scriptPubKey,
if (scriptPubKey.IsPayToScriptHash() && scriptSig.IsPushOnly()) {
CScript::const_iterator pc = scriptSig.begin();
- vector<unsigned char> data;
+ std::vector<unsigned char> data;
while (pc < scriptSig.end()) {
opcodetype opcode;
scriptSig.GetOp(pc, opcode, data);
diff --git a/src/script/interpreter.h b/src/script/interpreter.h
index c6385cb519..1cb9cc7899 100644
--- a/src/script/interpreter.h
+++ b/src/script/interpreter.h
@@ -115,7 +115,7 @@ struct PrecomputedTransactionData
uint256 hashPrevouts, hashSequence, hashOutputs;
bool ready = false;
- PrecomputedTransactionData(const CTransaction& tx);
+ explicit PrecomputedTransactionData(const CTransaction& tx);
};
enum SigVersion
@@ -124,7 +124,7 @@ enum SigVersion
SIGVERSION_WITNESS_V0 = 1,
};
-uint256 SignatureHash(const CScript &scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, const CAmount& amount, SigVersion sigversion, const PrecomputedTransactionData* cache = NULL);
+uint256 SignatureHash(const CScript &scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, const CAmount& amount, SigVersion sigversion, const PrecomputedTransactionData* cache = nullptr);
class BaseSignatureChecker
{
@@ -159,11 +159,11 @@ protected:
virtual bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
public:
- TransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn) : txTo(txToIn), nIn(nInIn), amount(amountIn), txdata(NULL) {}
+ TransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn) : txTo(txToIn), nIn(nInIn), amount(amountIn), txdata(nullptr) {}
TransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, const PrecomputedTransactionData& txdataIn) : txTo(txToIn), nIn(nInIn), amount(amountIn), txdata(&txdataIn) {}
- bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const;
- bool CheckLockTime(const CScriptNum& nLockTime) const;
- bool CheckSequence(const CScriptNum& nSequence) const;
+ bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override;
+ bool CheckLockTime(const CScriptNum& nLockTime) const override;
+ bool CheckSequence(const CScriptNum& nSequence) const override;
};
class MutableTransactionSignatureChecker : public TransactionSignatureChecker
@@ -172,11 +172,11 @@ private:
const CTransaction txTo;
public:
- MutableTransactionSignatureChecker(const CMutableTransaction* txToIn, unsigned int nInIn, const CAmount& amount) : TransactionSignatureChecker(&txTo, nInIn, amount), txTo(*txToIn) {}
+ MutableTransactionSignatureChecker(const CMutableTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn) : TransactionSignatureChecker(&txTo, nInIn, amountIn), txTo(*txToIn) {}
};
-bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptError* error = NULL);
-bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CScriptWitness* witness, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* serror = NULL);
+bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptError* error = nullptr);
+bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CScriptWitness* witness, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* serror = nullptr);
size_t CountWitnessSigOps(const CScript& scriptSig, const CScript& scriptPubKey, const CScriptWitness* witness, unsigned int flags);
diff --git a/src/script/ismine.cpp b/src/script/ismine.cpp
index 608a8de8f5..6b68f0679e 100644
--- a/src/script/ismine.cpp
+++ b/src/script/ismine.cpp
@@ -11,16 +11,13 @@
#include "script/standard.h"
#include "script/sign.h"
-#include <boost/foreach.hpp>
-using namespace std;
+typedef std::vector<unsigned char> valtype;
-typedef vector<unsigned char> valtype;
-
-unsigned int HaveKeys(const vector<valtype>& pubkeys, const CKeyStore& keystore)
+unsigned int HaveKeys(const std::vector<valtype>& pubkeys, const CKeyStore& keystore)
{
unsigned int nResult = 0;
- BOOST_FOREACH(const valtype& pubkey, pubkeys)
+ for (const valtype& pubkey : pubkeys)
{
CKeyID keyID = CPubKey(pubkey).GetID();
if (keystore.HaveKey(keyID))
@@ -49,7 +46,9 @@ isminetype IsMine(const CKeyStore &keystore, const CTxDestination& dest, bool& i
isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey, bool& isInvalid, SigVersion sigversion)
{
- vector<valtype> vSolutions;
+ isInvalid = false;
+
+ std::vector<valtype> vSolutions;
txnouttype whichType;
if (!Solver(scriptPubKey, whichType, vSolutions)) {
if (keystore.HaveWatchOnly(scriptPubKey))
@@ -62,6 +61,7 @@ isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey, bool&
{
case TX_NONSTANDARD:
case TX_NULL_DATA:
+ case TX_WITNESS_UNKNOWN:
break;
case TX_PUBKEY:
keyID = CPubKey(vSolutions[0]).GetID();
@@ -132,7 +132,7 @@ isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey, bool&
// partially owned (somebody else has a key that can spend
// them) enable spend-out-from-under-you attacks, especially
// in shared-wallet situations.
- vector<valtype> keys(vSolutions.begin()+1, vSolutions.begin()+vSolutions.size()-1);
+ std::vector<valtype> keys(vSolutions.begin()+1, vSolutions.begin()+vSolutions.size()-1);
if (sigversion != SIGVERSION_BASE) {
for (size_t i = 0; i < keys.size(); i++) {
if (keys[i].size() != 33) {
diff --git a/src/script/script.cpp b/src/script/script.cpp
index 828ce1a056..a10b619f7d 100644
--- a/src/script/script.cpp
+++ b/src/script/script.cpp
@@ -8,8 +8,6 @@
#include "tinyformat.h"
#include "utilstrencodings.h"
-using namespace std;
-
const char* GetOpName(opcodetype opcode)
{
switch (opcode)
@@ -129,7 +127,7 @@ const char* GetOpName(opcodetype opcode)
case OP_CHECKMULTISIG : return "OP_CHECKMULTISIG";
case OP_CHECKMULTISIGVERIFY : return "OP_CHECKMULTISIGVERIFY";
- // expanson
+ // expansion
case OP_NOP1 : return "OP_NOP1";
case OP_CHECKLOCKTIMEVERIFY : return "OP_CHECKLOCKTIMEVERIFY";
case OP_CHECKSEQUENCEVERIFY : return "OP_CHECKSEQUENCEVERIFY";
@@ -186,18 +184,18 @@ unsigned int CScript::GetSigOpCount(const CScript& scriptSig) const
// get the last item that the scriptSig
// pushes onto the stack:
const_iterator pc = scriptSig.begin();
- vector<unsigned char> data;
+ std::vector<unsigned char> vData;
while (pc < scriptSig.end())
{
opcodetype opcode;
- if (!scriptSig.GetOp(pc, opcode, data))
+ if (!scriptSig.GetOp(pc, opcode, vData))
return 0;
if (opcode > OP_16)
return 0;
}
/// ... and return its opcount:
- CScript subscript(data.begin(), data.end());
+ CScript subscript(vData.begin(), vData.end());
return subscript.GetSigOpCount(true);
}
@@ -269,3 +267,16 @@ std::string CScriptWitness::ToString() const
}
return ret + ")";
}
+
+bool CScript::HasValidOps() const
+{
+ CScript::const_iterator it = begin();
+ while (it < end()) {
+ opcodetype opcode;
+ std::vector<unsigned char> item;
+ if (!GetOp(it, opcode, item) || opcode > MAX_OPCODE || item.size() > MAX_SCRIPT_ELEMENT_SIZE) {
+ return false;
+ }
+ }
+ return true;
+}
diff --git a/src/script/script.h b/src/script/script.h
index 654dff4625..2a92060543 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -8,6 +8,7 @@
#include "crypto/common.h"
#include "prevector.h"
+#include "serialize.h"
#include <assert.h>
#include <climits>
@@ -30,6 +31,9 @@ static const int MAX_PUBKEYS_PER_MULTISIG = 20;
// Maximum script length in bytes
static const int MAX_SCRIPT_SIZE = 10000;
+// Maximum number of values on script interpreter stack
+static const int MAX_STACK_SIZE = 1000;
+
// Threshold for nLockTime: below this value it is interpreted as block number,
// otherwise as UNIX timestamp.
static const unsigned int LOCKTIME_THRESHOLD = 500000000; // Tue Nov 5 00:53:20 1985 UTC
@@ -187,6 +191,9 @@ enum opcodetype
OP_INVALIDOPCODE = 0xff,
};
+// Maximum value that an opcode can be
+static const unsigned int MAX_OPCODE = OP_NOP10;
+
const char* GetOpName(opcodetype opcode);
class scriptnum_error : public std::runtime_error
@@ -370,6 +377,12 @@ private:
int64_t m_value;
};
+/**
+ * We use a prevector for the script to reduce the considerable memory overhead
+ * of vectors in cases where they normally contain a small number of small elements.
+ * Tests in October 2015 showed use of this reduced dbcache memory usage by 23%
+ * and made an initial sync 13% faster.
+ */
typedef prevector<28, unsigned char> CScriptBase;
/** Serialized script, used inside transaction inputs and outputs */
@@ -398,8 +411,16 @@ public:
CScript(std::vector<unsigned char>::const_iterator pbegin, std::vector<unsigned char>::const_iterator pend) : CScriptBase(pbegin, pend) { }
CScript(const unsigned char* pbegin, const unsigned char* pend) : CScriptBase(pbegin, pend) { }
+ ADD_SERIALIZE_METHODS;
+
+ template <typename Stream, typename Operation>
+ inline void SerializationOp(Stream& s, Operation ser_action) {
+ READWRITE(static_cast<CScriptBase&>(*this));
+ }
+
CScript& operator+=(const CScript& b)
{
+ reserve(size() + b.size());
insert(end(), b.begin(), b.end());
return *this;
}
@@ -448,16 +469,16 @@ public:
else if (b.size() <= 0xffff)
{
insert(end(), OP_PUSHDATA2);
- uint8_t data[2];
- WriteLE16(data, b.size());
- insert(end(), data, data + sizeof(data));
+ uint8_t _data[2];
+ WriteLE16(_data, b.size());
+ insert(end(), _data, _data + sizeof(_data));
}
else
{
insert(end(), OP_PUSHDATA4);
- uint8_t data[4];
- WriteLE32(data, b.size());
- insert(end(), data, data + sizeof(data));
+ uint8_t _data[4];
+ WriteLE32(_data, b.size());
+ insert(end(), _data, _data + sizeof(_data));
}
insert(end(), b.begin(), b.end());
return *this;
@@ -484,7 +505,7 @@ public:
bool GetOp(iterator& pc, opcodetype& opcodeRet)
{
const_iterator pc2 = pc;
- bool fRet = GetOp2(pc2, opcodeRet, NULL);
+ bool fRet = GetOp2(pc2, opcodeRet, nullptr);
pc = begin() + (pc2 - begin());
return fRet;
}
@@ -496,7 +517,7 @@ public:
bool GetOp(const_iterator& pc, opcodetype& opcodeRet) const
{
- return GetOp2(pc, opcodeRet, NULL);
+ return GetOp2(pc, opcodeRet, nullptr);
}
bool GetOp2(const_iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>* pvchRet) const
@@ -627,6 +648,9 @@ public:
bool IsPushOnly(const_iterator pc) const;
bool IsPushOnly() const;
+ /** Check if the script contains valid OP_CODES */
+ bool HasValidOps() const;
+
/**
* Returns whether the script is guaranteed to fail at execution,
* regardless of the initial stack. This allows outputs to be pruned
@@ -639,8 +663,9 @@ public:
void clear()
{
- // The default std::vector::clear() does not release memory.
- CScriptBase().swap(*this);
+ // The default prevector::clear() does not release memory
+ CScriptBase::clear();
+ shrink_to_fit();
}
};
diff --git a/src/script/script_error.cpp b/src/script/script_error.cpp
index c9d13c92a8..6c590f53e3 100644
--- a/src/script/script_error.cpp
+++ b/src/script/script_error.cpp
@@ -73,6 +73,8 @@ const char* ScriptErrorString(const ScriptError serror)
return "Witness version reserved for soft-fork upgrades";
case SCRIPT_ERR_PUBKEYTYPE:
return "Public key is neither compressed or uncompressed";
+ case SCRIPT_ERR_CLEANSTACK:
+ return "Extra items left on stack after execution";
case SCRIPT_ERR_WITNESS_PROGRAM_WRONG_LENGTH:
return "Witness program has incorrect length";
case SCRIPT_ERR_WITNESS_PROGRAM_WITNESS_EMPTY:
diff --git a/src/script/sigcache.cpp b/src/script/sigcache.cpp
index 09bedc5460..4cc7afa2f5 100644
--- a/src/script/sigcache.cpp
+++ b/src/script/sigcache.cpp
@@ -15,28 +15,6 @@
#include <boost/thread.hpp>
namespace {
-
-/**
- * We're hashing a nonce into the entries themselves, so we don't need extra
- * blinding in the set hash computation.
- *
- * This may exhibit platform endian dependent behavior but because these are
- * nonced hashes (random) and this state is only ever used locally it is safe.
- * All that matters is local consistency.
- */
-class SignatureCacheHasher
-{
-public:
- template <uint8_t hash_select>
- uint32_t operator()(const uint256& key) const
- {
- static_assert(hash_select <8, "SignatureCacheHasher only has 8 hashes available.");
- uint32_t u;
- std::memcpy(&u, key.begin()+4*hash_select, 4);
- return u;
- }
-};
-
/**
* Valid signature cache, to avoid doing expensive ECDSA signature checking
* twice for every transaction (once when accepted into memory pool, and
@@ -88,16 +66,18 @@ public:
* signatureCache could be made local to VerifySignature.
*/
static CSignatureCache signatureCache;
-}
+} // namespace
-// To be called once in AppInit2/TestingSetup to initialize the signatureCache
+// To be called once in AppInitMain/BasicTestingSetup to initialize the
+// signatureCache.
void InitSignatureCache()
{
- size_t nMaxCacheSize = GetArg("-maxsigcachesize", DEFAULT_MAX_SIG_CACHE_SIZE) * ((size_t) 1 << 20);
- if (nMaxCacheSize <= 0) return;
+ // nMaxCacheSize is unsigned. If -maxsigcachesize is set to zero,
+ // setup_bytes creates the minimum possible cache (2 elements).
+ size_t nMaxCacheSize = std::min(std::max((int64_t)0, gArgs.GetArg("-maxsigcachesize", DEFAULT_MAX_SIG_CACHE_SIZE) / 2), MAX_MAX_SIG_CACHE_SIZE) * ((size_t) 1 << 20);
size_t nElems = signatureCache.setup_bytes(nMaxCacheSize);
- LogPrintf("Using %zu MiB out of %zu requested for signature cache, able to store %zu elements\n",
- (nElems*sizeof(uint256)) >>20, nMaxCacheSize>>20, nElems);
+ LogPrintf("Using %zu MiB out of %zu/2 requested for signature cache, able to store %zu elements\n",
+ (nElems*sizeof(uint256)) >>20, (nMaxCacheSize*2)>>20, nElems);
}
bool CachingTransactionSignatureChecker::VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& pubkey, const uint256& sighash) const
diff --git a/src/script/sigcache.h b/src/script/sigcache.h
index c123a9ba0f..5832b264b3 100644
--- a/src/script/sigcache.h
+++ b/src/script/sigcache.h
@@ -14,18 +14,41 @@
// systems). Due to how we count cache size, actual memory usage is slightly
// more (~32.25 MB)
static const unsigned int DEFAULT_MAX_SIG_CACHE_SIZE = 32;
+// Maximum sig cache size allowed
+static const int64_t MAX_MAX_SIG_CACHE_SIZE = 16384;
class CPubKey;
+/**
+ * We're hashing a nonce into the entries themselves, so we don't need extra
+ * blinding in the set hash computation.
+ *
+ * This may exhibit platform endian dependent behavior but because these are
+ * nonced hashes (random) and this state is only ever used locally it is safe.
+ * All that matters is local consistency.
+ */
+class SignatureCacheHasher
+{
+public:
+ template <uint8_t hash_select>
+ uint32_t operator()(const uint256& key) const
+ {
+ static_assert(hash_select <8, "SignatureCacheHasher only has 8 hashes available.");
+ uint32_t u;
+ std::memcpy(&u, key.begin()+4*hash_select, 4);
+ return u;
+ }
+};
+
class CachingTransactionSignatureChecker : public TransactionSignatureChecker
{
private:
bool store;
public:
- CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amount, bool storeIn, PrecomputedTransactionData& txdataIn) : TransactionSignatureChecker(txToIn, nInIn, amount, txdataIn), store(storeIn) {}
+ CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, bool storeIn, PrecomputedTransactionData& txdataIn) : TransactionSignatureChecker(txToIn, nInIn, amountIn, txdataIn), store(storeIn) {}
- bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
+ bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const override;
};
void InitSignatureCache();
diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index b008df2591..ac58b690a2 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -12,9 +12,6 @@
#include "script/standard.h"
#include "uint256.h"
-#include <boost/foreach.hpp>
-
-using namespace std;
typedef std::vector<unsigned char> valtype;
@@ -39,14 +36,14 @@ bool TransactionSignatureCreator::CreateSig(std::vector<unsigned char>& vchSig,
static bool Sign1(const CKeyID& address, const BaseSignatureCreator& creator, const CScript& scriptCode, std::vector<valtype>& ret, SigVersion sigversion)
{
- vector<unsigned char> vchSig;
+ std::vector<unsigned char> vchSig;
if (!creator.CreateSig(vchSig, address, scriptCode, sigversion))
return false;
ret.push_back(vchSig);
return true;
}
-static bool SignN(const vector<valtype>& multisigdata, const BaseSignatureCreator& creator, const CScript& scriptCode, std::vector<valtype>& ret, SigVersion sigversion)
+static bool SignN(const std::vector<valtype>& multisigdata, const BaseSignatureCreator& creator, const CScript& scriptCode, std::vector<valtype>& ret, SigVersion sigversion)
{
int nSigned = 0;
int nRequired = multisigdata.front()[0];
@@ -73,7 +70,7 @@ static bool SignStep(const BaseSignatureCreator& creator, const CScript& scriptP
uint160 h160;
ret.clear();
- vector<valtype> vSolutions;
+ std::vector<valtype> vSolutions;
if (!Solver(scriptPubKey, whichTypeRet, vSolutions))
return false;
@@ -82,6 +79,7 @@ static bool SignStep(const BaseSignatureCreator& creator, const CScript& scriptP
{
case TX_NONSTANDARD:
case TX_NULL_DATA:
+ case TX_WITNESS_UNKNOWN:
return false;
case TX_PUBKEY:
keyID = CPubKey(vSolutions[0]).GetID();
@@ -125,10 +123,10 @@ static bool SignStep(const BaseSignatureCreator& creator, const CScript& scriptP
}
}
-static CScript PushAll(const vector<valtype>& values)
+static CScript PushAll(const std::vector<valtype>& values)
{
CScript result;
- BOOST_FOREACH(const valtype& v, values) {
+ for (const valtype& v : values) {
if (v.size() == 0) {
result << OP_0;
} else if (v.size() == 1 && v[0] >= 1 && v[0] <= 16) {
@@ -143,10 +141,9 @@ static CScript PushAll(const vector<valtype>& values)
bool ProduceSignature(const BaseSignatureCreator& creator, const CScript& fromPubKey, SignatureData& sigdata)
{
CScript script = fromPubKey;
- bool solved = true;
std::vector<valtype> result;
txnouttype whichType;
- solved = SignStep(creator, script, result, whichType, SIGVERSION_BASE);
+ bool solved = SignStep(creator, script, result, whichType, SIGVERSION_BASE);
bool P2SH = false;
CScript subscript;
sigdata.scriptWitness.stack.clear();
@@ -228,18 +225,18 @@ bool SignSignature(const CKeyStore &keystore, const CTransaction& txFrom, CMutab
return SignSignature(keystore, txout.scriptPubKey, txTo, nIn, txout.nValue, nHashType);
}
-static vector<valtype> CombineMultisig(const CScript& scriptPubKey, const BaseSignatureChecker& checker,
- const vector<valtype>& vSolutions,
- const vector<valtype>& sigs1, const vector<valtype>& sigs2, SigVersion sigversion)
+static std::vector<valtype> CombineMultisig(const CScript& scriptPubKey, const BaseSignatureChecker& checker,
+ const std::vector<valtype>& vSolutions,
+ const std::vector<valtype>& sigs1, const std::vector<valtype>& sigs2, SigVersion sigversion)
{
// Combine all the signatures we've got:
- set<valtype> allsigs;
- BOOST_FOREACH(const valtype& v, sigs1)
+ std::set<valtype> allsigs;
+ for (const valtype& v : sigs1)
{
if (!v.empty())
allsigs.insert(v);
}
- BOOST_FOREACH(const valtype& v, sigs2)
+ for (const valtype& v : sigs2)
{
if (!v.empty())
allsigs.insert(v);
@@ -249,8 +246,8 @@ static vector<valtype> CombineMultisig(const CScript& scriptPubKey, const BaseSi
assert(vSolutions.size() > 1);
unsigned int nSigsRequired = vSolutions.front()[0];
unsigned int nPubKeys = vSolutions.size()-2;
- map<valtype, valtype> sigs;
- BOOST_FOREACH(const valtype& sig, allsigs)
+ std::map<valtype, valtype> sigs;
+ for (const valtype& sig : allsigs)
{
for (unsigned int i = 0; i < nPubKeys; i++)
{
@@ -306,13 +303,14 @@ struct Stacks
}
static Stacks CombineSignatures(const CScript& scriptPubKey, const BaseSignatureChecker& checker,
- const txnouttype txType, const vector<valtype>& vSolutions,
+ const txnouttype txType, const std::vector<valtype>& vSolutions,
Stacks sigs1, Stacks sigs2, SigVersion sigversion)
{
switch (txType)
{
case TX_NONSTANDARD:
case TX_NULL_DATA:
+ case TX_WITNESS_UNKNOWN:
// Don't know anything about this, assume bigger one is correct:
if (sigs1.script.size() >= sigs2.script.size())
return sigs1;
@@ -340,7 +338,7 @@ static Stacks CombineSignatures(const CScript& scriptPubKey, const BaseSignature
CScript pubKey2(spk.begin(), spk.end());
txnouttype txType2;
- vector<vector<unsigned char> > vSolutions2;
+ std::vector<std::vector<unsigned char> > vSolutions2;
Solver(pubKey2, txType2, vSolutions2);
sigs1.script.pop_back();
sigs2.script.pop_back();
@@ -360,7 +358,7 @@ static Stacks CombineSignatures(const CScript& scriptPubKey, const BaseSignature
// Recur to combine:
CScript pubKey2(sigs1.witness.back().begin(), sigs1.witness.back().end());
txnouttype txType2;
- vector<valtype> vSolutions2;
+ std::vector<valtype> vSolutions2;
Solver(pubKey2, txType2, vSolutions2);
sigs1.witness.pop_back();
sigs1.script = sigs1.witness;
@@ -383,7 +381,7 @@ SignatureData CombineSignatures(const CScript& scriptPubKey, const BaseSignature
const SignatureData& scriptSig1, const SignatureData& scriptSig2)
{
txnouttype txType;
- vector<vector<unsigned char> > vSolutions;
+ std::vector<std::vector<unsigned char> > vSolutions;
Solver(scriptPubKey, txType, vSolutions);
return CombineSignatures(scriptPubKey, checker, txType, vSolutions, Stacks(scriptSig1), Stacks(scriptSig2), SIGVERSION_BASE).Output();
@@ -396,13 +394,13 @@ class DummySignatureChecker : public BaseSignatureChecker
public:
DummySignatureChecker() {}
- bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const
+ bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override
{
return true;
}
};
const DummySignatureChecker dummyChecker;
-}
+} // namespace
const BaseSignatureChecker& DummySignatureCreator::Checker() const
{
diff --git a/src/script/sign.h b/src/script/sign.h
index 1cfc53c6c1..a0d8ee4ff9 100644
--- a/src/script/sign.h
+++ b/src/script/sign.h
@@ -21,7 +21,7 @@ protected:
const CKeyStore* keystore;
public:
- BaseSignatureCreator(const CKeyStore* keystoreIn) : keystore(keystoreIn) {}
+ explicit BaseSignatureCreator(const CKeyStore* keystoreIn) : keystore(keystoreIn) {}
const CKeyStore& KeyStore() const { return *keystore; };
virtual ~BaseSignatureCreator() {}
virtual const BaseSignatureChecker& Checker() const =0;
@@ -40,23 +40,23 @@ class TransactionSignatureCreator : public BaseSignatureCreator {
public:
TransactionSignatureCreator(const CKeyStore* keystoreIn, const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, int nHashTypeIn=SIGHASH_ALL);
- const BaseSignatureChecker& Checker() const { return checker; }
- bool CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const;
+ const BaseSignatureChecker& Checker() const override { return checker; }
+ bool CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const override;
};
class MutableTransactionSignatureCreator : public TransactionSignatureCreator {
CTransaction tx;
public:
- MutableTransactionSignatureCreator(const CKeyStore* keystoreIn, const CMutableTransaction* txToIn, unsigned int nInIn, const CAmount& amount, int nHashTypeIn) : TransactionSignatureCreator(keystoreIn, &tx, nInIn, amount, nHashTypeIn), tx(*txToIn) {}
+ MutableTransactionSignatureCreator(const CKeyStore* keystoreIn, const CMutableTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, int nHashTypeIn) : TransactionSignatureCreator(keystoreIn, &tx, nInIn, amountIn, nHashTypeIn), tx(*txToIn) {}
};
/** A signature creator that just produces 72-byte empty signatures. */
class DummySignatureCreator : public BaseSignatureCreator {
public:
- DummySignatureCreator(const CKeyStore* keystoreIn) : BaseSignatureCreator(keystoreIn) {}
- const BaseSignatureChecker& Checker() const;
- bool CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const;
+ explicit DummySignatureCreator(const CKeyStore* keystoreIn) : BaseSignatureCreator(keystoreIn) {}
+ const BaseSignatureChecker& Checker() const override;
+ bool CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const override;
};
struct SignatureData {
diff --git a/src/script/standard.cpp b/src/script/standard.cpp
index 4b9bec9aa1..f57f1f61b4 100644
--- a/src/script/standard.cpp
+++ b/src/script/standard.cpp
@@ -10,11 +10,8 @@
#include "util.h"
#include "utilstrencodings.h"
-#include <boost/foreach.hpp>
-using namespace std;
-
-typedef vector<unsigned char> valtype;
+typedef std::vector<unsigned char> valtype;
bool fAcceptDatacarrier = DEFAULT_ACCEPT_DATACARRIER;
unsigned nMaxDatacarrierBytes = MAX_OP_RETURN_RELAY;
@@ -33,27 +30,25 @@ const char* GetTxnOutputType(txnouttype t)
case TX_NULL_DATA: return "nulldata";
case TX_WITNESS_V0_KEYHASH: return "witness_v0_keyhash";
case TX_WITNESS_V0_SCRIPTHASH: return "witness_v0_scripthash";
+ case TX_WITNESS_UNKNOWN: return "witness_unknown";
}
- return NULL;
+ return nullptr;
}
-/**
- * Return public keys or hashes from scriptPubKey, for 'standard' transaction types.
- */
-bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, vector<vector<unsigned char> >& vSolutionsRet)
+bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet)
{
// Templates
- static multimap<txnouttype, CScript> mTemplates;
+ static std::multimap<txnouttype, CScript> mTemplates;
if (mTemplates.empty())
{
// Standard tx, sender provides pubkey, receiver adds signature
- mTemplates.insert(make_pair(TX_PUBKEY, CScript() << OP_PUBKEY << OP_CHECKSIG));
+ mTemplates.insert(std::make_pair(TX_PUBKEY, CScript() << OP_PUBKEY << OP_CHECKSIG));
// Bitcoin address tx, sender provides hash of pubkey, receiver provides signature and pubkey
- mTemplates.insert(make_pair(TX_PUBKEYHASH, CScript() << OP_DUP << OP_HASH160 << OP_PUBKEYHASH << OP_EQUALVERIFY << OP_CHECKSIG));
+ mTemplates.insert(std::make_pair(TX_PUBKEYHASH, CScript() << OP_DUP << OP_HASH160 << OP_PUBKEYHASH << OP_EQUALVERIFY << OP_CHECKSIG));
// Sender provides N pubkeys, receivers provides M signatures
- mTemplates.insert(make_pair(TX_MULTISIG, CScript() << OP_SMALLINTEGER << OP_PUBKEYS << OP_SMALLINTEGER << OP_CHECKMULTISIG));
+ mTemplates.insert(std::make_pair(TX_MULTISIG, CScript() << OP_SMALLINTEGER << OP_PUBKEYS << OP_SMALLINTEGER << OP_CHECKMULTISIG));
}
vSolutionsRet.clear();
@@ -63,7 +58,7 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, vector<vector<unsi
if (scriptPubKey.IsPayToScriptHash())
{
typeRet = TX_SCRIPTHASH;
- vector<unsigned char> hashBytes(scriptPubKey.begin()+2, scriptPubKey.begin()+22);
+ std::vector<unsigned char> hashBytes(scriptPubKey.begin()+2, scriptPubKey.begin()+22);
vSolutionsRet.push_back(hashBytes);
return true;
}
@@ -81,6 +76,12 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, vector<vector<unsi
vSolutionsRet.push_back(witnessprogram);
return true;
}
+ if (witnessversion != 0) {
+ typeRet = TX_WITNESS_UNKNOWN;
+ vSolutionsRet.push_back(std::vector<unsigned char>{(unsigned char)witnessversion});
+ vSolutionsRet.push_back(std::move(witnessprogram));
+ return true;
+ }
return false;
}
@@ -96,13 +97,13 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, vector<vector<unsi
// Scan templates
const CScript& script1 = scriptPubKey;
- BOOST_FOREACH(const PAIRTYPE(txnouttype, CScript)& tplate, mTemplates)
+ for (const std::pair<txnouttype, CScript>& tplate : mTemplates)
{
const CScript& script2 = tplate.second;
vSolutionsRet.clear();
opcodetype opcode1, opcode2;
- vector<unsigned char> vch1, vch2;
+ std::vector<unsigned char> vch1, vch2;
// Compare
CScript::const_iterator pc1 = script1.begin();
@@ -181,7 +182,7 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, vector<vector<unsi
bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet)
{
- vector<valtype> vSolutions;
+ std::vector<valtype> vSolutions;
txnouttype whichType;
if (!Solver(scriptPubKey, whichType, vSolutions))
return false;
@@ -204,16 +205,33 @@ bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet)
{
addressRet = CScriptID(uint160(vSolutions[0]));
return true;
+ } else if (whichType == TX_WITNESS_V0_KEYHASH) {
+ WitnessV0KeyHash hash;
+ std::copy(vSolutions[0].begin(), vSolutions[0].end(), hash.begin());
+ addressRet = hash;
+ return true;
+ } else if (whichType == TX_WITNESS_V0_SCRIPTHASH) {
+ WitnessV0ScriptHash hash;
+ std::copy(vSolutions[0].begin(), vSolutions[0].end(), hash.begin());
+ addressRet = hash;
+ return true;
+ } else if (whichType == TX_WITNESS_UNKNOWN) {
+ WitnessUnknown unk;
+ unk.version = vSolutions[0][0];
+ std::copy(vSolutions[1].begin(), vSolutions[1].end(), unk.program);
+ unk.length = vSolutions[1].size();
+ addressRet = unk;
+ return true;
}
// Multisig txns have more than one address...
return false;
}
-bool ExtractDestinations(const CScript& scriptPubKey, txnouttype& typeRet, vector<CTxDestination>& addressRet, int& nRequiredRet)
+bool ExtractDestinations(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CTxDestination>& addressRet, int& nRequiredRet)
{
addressRet.clear();
typeRet = TX_NONSTANDARD;
- vector<valtype> vSolutions;
+ std::vector<valtype> vSolutions;
if (!Solver(scriptPubKey, typeRet, vSolutions))
return false;
if (typeRet == TX_NULL_DATA){
@@ -256,7 +274,7 @@ class CScriptVisitor : public boost::static_visitor<bool>
private:
CScript *script;
public:
- CScriptVisitor(CScript *scriptin) { script = scriptin; }
+ explicit CScriptVisitor(CScript *scriptin) { script = scriptin; }
bool operator()(const CNoDestination &dest) const {
script->clear();
@@ -274,8 +292,29 @@ public:
*script << OP_HASH160 << ToByteVector(scriptID) << OP_EQUAL;
return true;
}
+
+ bool operator()(const WitnessV0KeyHash& id) const
+ {
+ script->clear();
+ *script << OP_0 << ToByteVector(id);
+ return true;
+ }
+
+ bool operator()(const WitnessV0ScriptHash& id) const
+ {
+ script->clear();
+ *script << OP_0 << ToByteVector(id);
+ return true;
+ }
+
+ bool operator()(const WitnessUnknown& id) const
+ {
+ script->clear();
+ *script << CScript::EncodeOP_N(id.version) << std::vector<unsigned char>(id.program, id.program + id.length);
+ return true;
+ }
};
-}
+} // namespace
CScript GetScriptForDestination(const CTxDestination& dest)
{
@@ -295,7 +334,7 @@ CScript GetScriptForMultisig(int nRequired, const std::vector<CPubKey>& keys)
CScript script;
script << CScript::EncodeOP_N(nRequired);
- BOOST_FOREACH(const CPubKey& key, keys)
+ for (const CPubKey& key : keys)
script << ToByteVector(key);
script << CScript::EncodeOP_N(keys.size()) << OP_CHECKMULTISIG;
return script;
@@ -323,3 +362,7 @@ CScript GetScriptForWitness(const CScript& redeemscript)
ret << OP_0 << ToByteVector(hash);
return ret;
}
+
+bool IsValidDestination(const CTxDestination& dest) {
+ return dest.which() != 0;
+}
diff --git a/src/script/standard.h b/src/script/standard.h
index 097e0c3748..fa07ea88c1 100644
--- a/src/script/standard.h
+++ b/src/script/standard.h
@@ -27,8 +27,19 @@ public:
CScriptID(const uint160& in) : uint160(in) {}
};
-static const unsigned int MAX_OP_RETURN_RELAY = 83; //!< bytes (+1 for OP_RETURN, +2 for the pushdata opcodes)
+/**
+ * Default setting for nMaxDatacarrierBytes. 80 bytes of data, +1 for OP_RETURN,
+ * +2 for the pushdata opcodes.
+ */
+static const unsigned int MAX_OP_RETURN_RELAY = 83;
+
+/**
+ * A data carrying output is an unspendable output containing data. The script
+ * type is designated as TX_NULL_DATA.
+ */
extern bool fAcceptDatacarrier;
+
+/** Maximum size of TX_NULL_DATA scripts that this node considers standard. */
extern unsigned nMaxDatacarrierBytes;
/**
@@ -36,7 +47,7 @@ extern unsigned nMaxDatacarrierBytes;
* them to be valid. (but old blocks may not comply with) Currently just P2SH,
* but in the future other flags may be added, such as a soft-fork to enforce
* strict DER encoding.
- *
+ *
* Failing one of these tests may trigger a DoS ban - see CheckInputs() for
* details.
*/
@@ -50,9 +61,10 @@ enum txnouttype
TX_PUBKEYHASH,
TX_SCRIPTHASH,
TX_MULTISIG,
- TX_NULL_DATA,
+ TX_NULL_DATA, //!< unspendable OP_RETURN script that carries data
TX_WITNESS_V0_SCRIPTHASH,
TX_WITNESS_V0_KEYHASH,
+ TX_WITNESS_UNKNOWN, //!< Only for Witness versions not already defined above
};
class CNoDestination {
@@ -61,24 +73,98 @@ public:
friend bool operator<(const CNoDestination &a, const CNoDestination &b) { return true; }
};
-/**
+struct WitnessV0ScriptHash : public uint256 {};
+struct WitnessV0KeyHash : public uint160 {};
+
+//! CTxDestination subtype to encode any future Witness version
+struct WitnessUnknown
+{
+ unsigned int version;
+ unsigned int length;
+ unsigned char program[40];
+
+ friend bool operator==(const WitnessUnknown& w1, const WitnessUnknown& w2) {
+ if (w1.version != w2.version) return false;
+ if (w1.length != w2.length) return false;
+ return std::equal(w1.program, w1.program + w1.length, w2.program);
+ }
+
+ friend bool operator<(const WitnessUnknown& w1, const WitnessUnknown& w2) {
+ if (w1.version < w2.version) return true;
+ if (w1.version > w2.version) return false;
+ if (w1.length < w2.length) return true;
+ if (w1.length > w2.length) return false;
+ return std::lexicographical_compare(w1.program, w1.program + w1.length, w2.program, w2.program + w2.length);
+ }
+};
+
+/**
* A txout script template with a specific destination. It is either:
* * CNoDestination: no destination set
- * * CKeyID: TX_PUBKEYHASH destination
- * * CScriptID: TX_SCRIPTHASH destination
- * A CTxDestination is the internal data type encoded in a CBitcoinAddress
+ * * CKeyID: TX_PUBKEYHASH destination (P2PKH)
+ * * CScriptID: TX_SCRIPTHASH destination (P2SH)
+ * * WitnessV0ScriptHash: TX_WITNESS_V0_SCRIPTHASH destination (P2WSH)
+ * * WitnessV0KeyHash: TX_WITNESS_V0_KEYHASH destination (P2WPKH)
+ * * WitnessUnknown: TX_WITNESS_UNKNOWN destination (P2W???)
+ * A CTxDestination is the internal data type encoded in a bitcoin address
*/
-typedef boost::variant<CNoDestination, CKeyID, CScriptID> CTxDestination;
+typedef boost::variant<CNoDestination, CKeyID, CScriptID, WitnessV0ScriptHash, WitnessV0KeyHash, WitnessUnknown> CTxDestination;
+/** Check whether a CTxDestination is a CNoDestination. */
+bool IsValidDestination(const CTxDestination& dest);
+
+/** Get the name of a txnouttype as a C string, or nullptr if unknown. */
const char* GetTxnOutputType(txnouttype t);
+/**
+ * Parse a scriptPubKey and identify script type for standard scripts. If
+ * successful, returns script type and parsed pubkeys or hashes, depending on
+ * the type. For example, for a P2SH script, vSolutionsRet will contain the
+ * script hash, for P2PKH it will contain the key hash, etc.
+ *
+ * @param[in] scriptPubKey Script to parse
+ * @param[out] typeRet The script type
+ * @param[out] vSolutionsRet Vector of parsed pubkeys and hashes
+ * @return True if script matches standard template
+ */
bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet);
+
+/**
+ * Parse a standard scriptPubKey for the destination address. Assigns result to
+ * the addressRet parameter and returns true if successful. For multisig
+ * scripts, instead use ExtractDestinations. Currently only works for P2PK,
+ * P2PKH, P2SH, P2WPKH, and P2WSH scripts.
+ */
bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet);
+
+/**
+ * Parse a standard scriptPubKey with one or more destination addresses. For
+ * multisig scripts, this populates the addressRet vector with the pubkey IDs
+ * and nRequiredRet with the n required to spend. For other destinations,
+ * addressRet is populated with a single value and nRequiredRet is set to 1.
+ * Returns true if successful. Currently does not extract address from
+ * pay-to-witness scripts.
+ */
bool ExtractDestinations(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CTxDestination>& addressRet, int& nRequiredRet);
+/**
+ * Generate a Bitcoin scriptPubKey for the given CTxDestination. Returns a P2PKH
+ * script for a CKeyID destination, a P2SH script for a CScriptID, and an empty
+ * script for CNoDestination.
+ */
CScript GetScriptForDestination(const CTxDestination& dest);
+
+/** Generate a P2PK script for the given pubkey. */
CScript GetScriptForRawPubKey(const CPubKey& pubkey);
+
+/** Generate a multisig script. */
CScript GetScriptForMultisig(int nRequired, const std::vector<CPubKey>& keys);
+
+/**
+ * Generate a pay-to-witness script for the given redeem script. If the redeem
+ * script is P2PK or P2PKH, this returns a P2WPKH script, otherwise it returns a
+ * P2WSH script.
+ */
CScript GetScriptForWitness(const CScript& redeemscript);
#endif // BITCOIN_SCRIPT_STANDARD_H
generated by cgit v1.2.3 (git 2.26.2) at 2024-08-23 04:28:12 +0000