#ifndef H_BITCOIN_SCRIPT
#define H_BITCOIN_SCRIPT
-#include "base58.h"
-
#include <string>
#include <vector>
#include <boost/foreach.hpp>
+#include "keystore.h"
+#include "bignum.h"
+
+typedef std::vector<unsigned char> valtype;
+
class CTransaction;
-class CKeyStore;
+
+static const unsigned int MAX_SCRIPT_ELEMENT_SIZE = 520; // bytes
+
+/** IsMine() return codes */
+enum isminetype
+{
+ MINE_NO = 0,
+ MINE_WATCH_ONLY = 1,
+ MINE_SPENDABLE = 2,
+ MINE_ALL = MINE_WATCH_ONLY | MINE_SPENDABLE
+};
+
+typedef uint8_t isminefilter;
/** Signature hash types/flags */
enum
SIGHASH_ANYONECANPAY = 0x80,
};
+/** Script verification flags */
+enum
+{
+ SCRIPT_VERIFY_NONE = 0,
+ SCRIPT_VERIFY_P2SH = (1U << 0), // evaluate P2SH (BIP16) subscripts
+ SCRIPT_VERIFY_STRICTENC = (1U << 1), // enforce strict conformance to DER and SEC2 for signatures and pubkeys
+ SCRIPT_VERIFY_LOW_S = (1U << 2), // enforce low S values in signatures (depends on STRICTENC)
+ SCRIPT_VERIFY_NOCACHE = (1U << 3), // do not store results in signature cache (but do query it)
+ SCRIPT_VERIFY_NULLDUMMY = (1U << 4), // verify dummy stack item consumed by CHECKMULTISIG is of zero-length
+};
+
+// Strict verification:
+//
+// * force DER encoding;
+// * force low S;
+// * ensure that CHECKMULTISIG dummy argument is null.
+static const unsigned int STRICT_FORMAT_FLAGS = SCRIPT_VERIFY_STRICTENC | SCRIPT_VERIFY_LOW_S | SCRIPT_VERIFY_NULLDUMMY;
+
+// Mandatory script verification flags that all new blocks must comply with for
+// 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 ConnectInputs() for
+// details.
+static const unsigned int MANDATORY_SCRIPT_VERIFY_FLAGS = SCRIPT_VERIFY_P2SH;
+
+// Standard script verification flags that standard transactions will comply
+// with. However scripts violating these flags may still be present in valid
+// blocks and we must accept those blocks.
+static const unsigned int STRICT_FLAGS = MANDATORY_SCRIPT_VERIFY_FLAGS | STRICT_FORMAT_FLAGS;
+
+// Soft verifications, no extended signature format checkings
+static const unsigned int SOFT_FLAGS = STRICT_FLAGS & ~STRICT_FORMAT_FLAGS;
enum txnouttype
{
TX_PUBKEYHASH,
TX_SCRIPTHASH,
TX_MULTISIG,
+ TX_NULL_DATA,
};
const char* GetTxnOutputType(txnouttype t);
// template matching params
+ OP_SMALLDATA = 0xf9,
OP_SMALLINTEGER = 0xfa,
OP_PUBKEYS = 0xfb,
OP_PUBKEYHASH = 0xfd,
return *this;
}
+ CScript& operator<<(const CPubKey& key)
+ {
+ std::vector<unsigned char> vchKey = key.Raw();
+ return (*this) << vchKey;
+ }
+
CScript& operator<<(const CBigNum& b)
{
*this << b.getvch();
{
// I'm not sure if this should push the script or concatenate scripts.
// If there's ever a use for pushing a script onto a script, delete this member fn
- assert(!"warning: pushing a CScript onto a CScript with << is probably not intended, use + to concatenate");
+ assert(!"Warning: Pushing a CScript onto a CScript with << is probably not intended, use + to concatenate!");
return *this;
}
memcpy(&nSize, &pc[0], 4);
pc += 4;
}
- if (end() - pc < nSize)
+ if (end() - pc < 0 || (unsigned int)(end() - pc) < nSize)
return false;
if (pvchRet)
pvchRet->assign(pc, pc + nSize);
bool IsPayToScriptHash() const;
- // Called by CTransaction::IsStandard
+ // Called by CTransaction::IsStandard and P2SH VerifyScript (which makes it consensus-critical).
bool IsPushOnly() const
{
const_iterator pc = begin();
return true;
}
+ // Called by CTransaction::IsStandard.
+ bool HasCanonicalPushes() const;
- void SetBitcoinAddress(const CBitcoinAddress& address);
- void SetBitcoinAddress(const std::vector<unsigned char>& vchPubKey)
- {
- SetBitcoinAddress(CBitcoinAddress(vchPubKey));
- }
+ void SetDestination(const CTxDestination& address);
void SetMultisig(int nRequired, const std::vector<CKey>& keys);
- void SetPayToScriptHash(const CScript& subscript);
void PrintHex() const
printf("CScript(%s)\n", HexStr(begin(), end(), true).c_str());
}
- std::string ToString() const
+ std::string ToString(bool fShort=false) const
{
std::string str;
opcodetype opcode;
return str;
}
if (0 <= opcode && opcode <= OP_PUSHDATA4)
- str += ValueString(vch);
+ str += fShort? ValueString(vch).substr(0, 10) : ValueString(vch);
else
str += GetOpName(opcode);
}
{
printf("%s\n", ToString().c_str());
}
-};
-
+ CScriptID GetID() const
+ {
+ return CScriptID(Hash160(*this));
+ }
+};
+bool IsCanonicalPubKey(const std::vector<unsigned char> &vchPubKey, unsigned int flags);
+bool IsCanonicalSignature(const std::vector<unsigned char> &vchSig, unsigned int flags);
-bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType);
+bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType);
bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet);
int ScriptSigArgsExpected(txnouttype t, const std::vector<std::vector<unsigned char> >& vSolutions);
-bool IsStandard(const CScript& scriptPubKey);
-bool IsMine(const CKeyStore& keystore, const CScript& scriptPubKey);
-bool ExtractAddress(const CScript& scriptPubKey, CBitcoinAddress& addressRet);
-bool ExtractAddresses(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CBitcoinAddress>& addressRet, int& nRequiredRet);
+bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType);
+isminetype IsMine(const CKeyStore& keystore, const CScript& scriptPubKey);
+isminetype IsMine(const CKeyStore& keystore, const CTxDestination& dest);
+void ExtractAffectedKeys(const CKeyStore &keystore, const CScript& scriptPubKey, std::vector<CKeyID> &vKeys);
+bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet);
+bool ExtractDestinations(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CTxDestination>& addressRet, int& nRequiredRet);
+bool SignSignature(const CKeyStore& keystore, const CScript& fromPubKey, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL);
bool SignSignature(const CKeyStore& keystore, const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL);
-bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, bool fValidatePayToScriptHash, int nHashType);
+bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType);
+
+// Given two sets of signatures for scriptPubKey, possibly with OP_0 placeholders,
+// combine them intelligently and return the result.
+CScript CombineSignatures(CScript scriptPubKey, const CTransaction& txTo, unsigned int nIn, const CScript& scriptSig1, const CScript& scriptSig2);
#endif
git://git.novaco.in / novacoin.git / blobdiff