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189 lines
5.7 KiB
189 lines
5.7 KiB
// Copyright (c) 2009-2016 The Bitcoin Core developers |
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// Distributed under the MIT 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 <core_io.h> |
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#include <primitives/block.h> |
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#include <primitives/transaction.h> |
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#include <script/script.h> |
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#include <serialize.h> |
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#include <streams.h> |
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#include <univalue.h> |
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#include <util.h> |
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#include <utilstrencodings.h> |
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#include <version.h> |
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#include <boost/algorithm/string/classification.hpp> |
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#include <boost/algorithm/string/predicate.hpp> |
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#include <boost/algorithm/string/replace.hpp> |
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#include <boost/algorithm/string/split.hpp> |
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CScript ParseScript(const std::string& s) |
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{ |
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CScript result; |
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static std::map<std::string, opcodetype> mapOpNames; |
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if (mapOpNames.empty()) |
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{ |
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for (unsigned int op = 0; op <= MAX_OPCODE; op++) |
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{ |
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// Allow OP_RESERVED to get into mapOpNames |
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if (op < OP_NOP && op != OP_RESERVED) |
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continue; |
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const char* name = GetOpName((opcodetype)op); |
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if (strcmp(name, "OP_UNKNOWN") == 0) |
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continue; |
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std::string strName(name); |
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mapOpNames[strName] = (opcodetype)op; |
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// Convenience: OP_ADD and just ADD are both recognized: |
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boost::algorithm::replace_first(strName, "OP_", ""); |
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mapOpNames[strName] = (opcodetype)op; |
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} |
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} |
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std::vector<std::string> words; |
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boost::algorithm::split(words, s, boost::algorithm::is_any_of(" \t\n"), boost::algorithm::token_compress_on); |
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for (std::vector<std::string>::const_iterator w = words.begin(); w != words.end(); ++w) |
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{ |
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if (w->empty()) |
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{ |
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// Empty string, ignore. (boost::split given '' will return one word) |
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} |
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else if (all(*w, boost::algorithm::is_digit()) || |
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(boost::algorithm::starts_with(*w, "-") && all(std::string(w->begin()+1, w->end()), boost::algorithm::is_digit()))) |
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{ |
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// Number |
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int64_t n = atoi64(*w); |
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result << n; |
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} |
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else if (boost::algorithm::starts_with(*w, "0x") && (w->begin()+2 != w->end()) && IsHex(std::string(w->begin()+2, w->end()))) |
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{ |
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// Raw hex data, inserted NOT pushed onto stack: |
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std::vector<unsigned char> raw = ParseHex(std::string(w->begin()+2, w->end())); |
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result.insert(result.end(), raw.begin(), raw.end()); |
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} |
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else if (w->size() >= 2 && boost::algorithm::starts_with(*w, "'") && boost::algorithm::ends_with(*w, "'")) |
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{ |
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// Single-quoted string, pushed as data. NOTE: this is poor-man's |
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// parsing, spaces/tabs/newlines in single-quoted strings won't work. |
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std::vector<unsigned char> value(w->begin()+1, w->end()-1); |
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result << value; |
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} |
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else if (mapOpNames.count(*w)) |
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{ |
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// opcode, e.g. OP_ADD or ADD: |
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result << mapOpNames[*w]; |
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} |
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else |
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{ |
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throw std::runtime_error("script parse error"); |
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} |
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} |
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return result; |
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} |
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// Check that all of the input and output scripts of a transaction contains valid opcodes |
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bool CheckTxScriptsSanity(const CMutableTransaction& tx) |
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{ |
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// Check input scripts for non-coinbase txs |
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if (!CTransaction(tx).IsCoinBase()) { |
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for (unsigned int i = 0; i < tx.vin.size(); i++) { |
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if (!tx.vin[i].scriptSig.HasValidOps() || tx.vin[i].scriptSig.size() > MAX_SCRIPT_SIZE) { |
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return false; |
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} |
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} |
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} |
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// Check output scripts |
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for (unsigned int i = 0; i < tx.vout.size(); i++) { |
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if (!tx.vout[i].scriptPubKey.HasValidOps() || tx.vout[i].scriptPubKey.size() > MAX_SCRIPT_SIZE) { |
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return false; |
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} |
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} |
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return true; |
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} |
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bool DecodeHexTx(CMutableTransaction& tx, const std::string& strHexTx, bool fTryNoWitness) |
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{ |
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if (!IsHex(strHexTx)) { |
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return false; |
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} |
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std::vector<unsigned char> txData(ParseHex(strHexTx)); |
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if (fTryNoWitness) { |
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CDataStream ssData(txData, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS); |
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try { |
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ssData >> tx; |
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if (ssData.eof() && CheckTxScriptsSanity(tx)) { |
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return true; |
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} |
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} |
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catch (const std::exception&) { |
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// Fall through. |
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} |
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} |
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CDataStream ssData(txData, SER_NETWORK, PROTOCOL_VERSION); |
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try { |
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ssData >> tx; |
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if (!ssData.empty()) { |
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return false; |
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} |
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} |
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catch (const std::exception&) { |
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return false; |
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} |
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return true; |
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} |
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bool DecodeHexBlk(CBlock& block, const std::string& strHexBlk) |
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{ |
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if (!IsHex(strHexBlk)) |
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return false; |
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std::vector<unsigned char> blockData(ParseHex(strHexBlk)); |
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CDataStream ssBlock(blockData, SER_NETWORK, PROTOCOL_VERSION); |
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try { |
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ssBlock >> block; |
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} |
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catch (const std::exception&) { |
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return false; |
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} |
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return true; |
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} |
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uint256 ParseHashUV(const UniValue& v, const std::string& strName) |
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{ |
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std::string strHex; |
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if (v.isStr()) |
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strHex = v.getValStr(); |
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return ParseHashStr(strHex, strName); // Note: ParseHashStr("") throws a runtime_error |
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} |
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uint256 ParseHashStr(const std::string& strHex, const std::string& strName) |
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{ |
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if (!IsHex(strHex)) // Note: IsHex("") is false |
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throw std::runtime_error(strName + " must be hexadecimal string (not '" + strHex + "')"); |
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uint256 result; |
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result.SetHex(strHex); |
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return result; |
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} |
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std::vector<unsigned char> ParseHexUV(const UniValue& v, const std::string& strName) |
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{ |
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std::string strHex; |
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if (v.isStr()) |
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strHex = v.getValStr(); |
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if (!IsHex(strHex)) |
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throw std::runtime_error(strName + " must be hexadecimal string (not '" + strHex + "')"); |
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return ParseHex(strHex); |
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}
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