128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2013 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "scriptutils.h"
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#include "key.h"
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#include "keystore.h"
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#include "script/standard.h"
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#include <boost/foreach.hpp>
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using namespace std;
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typedef vector<unsigned char> valtype;
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unsigned int HaveKeys(const vector<valtype>& pubkeys, const CKeyStore& keystore)
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{
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unsigned int nResult = 0;
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BOOST_FOREACH(const valtype& pubkey, pubkeys)
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{
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CKeyID keyID = CPubKey(pubkey).GetID();
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if (keystore.HaveKey(keyID))
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++nResult;
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}
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return nResult;
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}
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isminetype IsMine(const CKeyStore &keystore, const CTxDestination& dest)
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{
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CScript script;
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script.SetDestination(dest);
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return IsMine(keystore, script);
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}
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isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey)
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{
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vector<valtype> vSolutions;
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txnouttype whichType;
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if (!Solver(scriptPubKey, whichType, vSolutions)) {
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if (keystore.HaveWatchOnly(scriptPubKey))
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return ISMINE_WATCH_ONLY;
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return ISMINE_NO;
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}
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CKeyID keyID;
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switch (whichType)
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{
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case TX_NONSTANDARD:
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case TX_NULL_DATA:
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break;
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case TX_PUBKEY:
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keyID = CPubKey(vSolutions[0]).GetID();
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if (keystore.HaveKey(keyID))
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return ISMINE_SPENDABLE;
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break;
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case TX_PUBKEYHASH:
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keyID = CKeyID(uint160(vSolutions[0]));
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if (keystore.HaveKey(keyID))
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return ISMINE_SPENDABLE;
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break;
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case TX_SCRIPTHASH:
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{
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CScriptID scriptID = CScriptID(uint160(vSolutions[0]));
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CScript subscript;
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if (keystore.GetCScript(scriptID, subscript)) {
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isminetype ret = IsMine(keystore, subscript);
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if (ret == ISMINE_SPENDABLE)
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return ret;
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}
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break;
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}
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case TX_MULTISIG:
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{
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// Only consider transactions "mine" if we own ALL the
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// keys involved. multi-signature transactions that are
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// partially owned (somebody else has a key that can spend
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// them) enable spend-out-from-under-you attacks, especially
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// in shared-wallet situations.
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vector<valtype> keys(vSolutions.begin()+1, vSolutions.begin()+vSolutions.size()-1);
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if (HaveKeys(keys, keystore) == keys.size())
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return ISMINE_SPENDABLE;
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break;
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}
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}
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if (keystore.HaveWatchOnly(scriptPubKey))
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return ISMINE_WATCH_ONLY;
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return ISMINE_NO;
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}
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class CAffectedKeysVisitor : public boost::static_visitor<void> {
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private:
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const CKeyStore &keystore;
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std::vector<CKeyID> &vKeys;
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public:
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CAffectedKeysVisitor(const CKeyStore &keystoreIn, std::vector<CKeyID> &vKeysIn) : keystore(keystoreIn), vKeys(vKeysIn) {}
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void Process(const CScript &script) {
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txnouttype type;
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std::vector<CTxDestination> vDest;
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int nRequired;
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if (ExtractDestinations(script, type, vDest, nRequired)) {
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BOOST_FOREACH(const CTxDestination &dest, vDest)
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boost::apply_visitor(*this, dest);
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}
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}
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void operator()(const CKeyID &keyId) {
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if (keystore.HaveKey(keyId))
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vKeys.push_back(keyId);
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}
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void operator()(const CScriptID &scriptId) {
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CScript script;
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if (keystore.GetCScript(scriptId, script))
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Process(script);
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}
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void operator()(const CNoDestination &none) {}
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};
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void ExtractAffectedKeys(const CKeyStore &keystore, const CScript& scriptPubKey, std::vector<CKeyID> &vKeys) {
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CAffectedKeysVisitor(keystore, vKeys).Process(scriptPubKey);
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}
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