src/core_read.cpp

   1 // Copyright (c) 2009-2016 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #include "core_io.h"
   6
   7 #include "primitives/block.h"
   8 #include "primitives/transaction.h"
   9 #include "script/script.h"
  10 #include "serialize.h"
  11 #include "streams.h"
  12 #include <univalue.h>
  13 #include "util.h"
  14 #include "utilstrencodings.h"
  15 #include "version.h"
  16
  17 #include <boost/algorithm/string/classification.hpp>
  18 #include <boost/algorithm/string/predicate.hpp>
  19 #include <boost/algorithm/string/replace.hpp>
  20 #include <boost/algorithm/string/split.hpp>
  21 #include <boost/assign/list_of.hpp>
  22
  23 CScript ParseScript(const std::string& s)
  24 {
  25     CScript result;
  26
  27     static std::map<std::string, opcodetype> mapOpNames;
  28
  29     if (mapOpNames.empty())
  30     {
  31         for (int op = 0; op <= OP_NOP10; op++)
  32         {
  33             // Allow OP_RESERVED to get into mapOpNames
  34             if (op < OP_NOP && op != OP_RESERVED)
  35                 continue;
  36
  37             const char* name = GetOpName((opcodetype)op);
  38             if (strcmp(name, "OP_UNKNOWN") == 0)
  39                 continue;
  40             std::string strName(name);
  41             mapOpNames[strName] = (opcodetype)op;
  42             // Convenience: OP_ADD and just ADD are both recognized:
  43             boost::algorithm::replace_first(strName, "OP_", "");
  44             mapOpNames[strName] = (opcodetype)op;
  45         }
  46     }
  47
  48     std::vector<std::string> words;
  49     boost::algorithm::split(words, s, boost::algorithm::is_any_of(" \t\n"), boost::algorithm::token_compress_on);
  50
  51     for (std::vector<std::string>::const_iterator w = words.begin(); w != words.end(); ++w)
  52     {
  53         if (w->empty())
  54         {
  55             // Empty string, ignore. (boost::split given '' will return one word)
  56         }
  57         else if (all(*w, boost::algorithm::is_digit()) ||
  58             (boost::algorithm::starts_with(*w, "-") && all(std::string(w->begin()+1, w->end()), boost::algorithm::is_digit())))
  59         {
  60             // Number
  61             int64_t n = atoi64(*w);
  62             result << n;
  63         }
  64         else if (boost::algorithm::starts_with(*w, "0x") && (w->begin()+2 != w->end()) && IsHex(std::string(w->begin()+2, w->end())))
  65         {
  66             // Raw hex data, inserted NOT pushed onto stack:
  67             std::vector<unsigned char> raw = ParseHex(std::string(w->begin()+2, w->end()));
  68             result.insert(result.end(), raw.begin(), raw.end());
  69         }
  70         else if (w->size() >= 2 && boost::algorithm::starts_with(*w, "'") && boost::algorithm::ends_with(*w, "'"))
  71         {
  72             // Single-quoted string, pushed as data. NOTE: this is poor-man's
  73             // parsing, spaces/tabs/newlines in single-quoted strings won't work.
  74             std::vector<unsigned char> value(w->begin()+1, w->end()-1);
  75             result << value;
  76         }
  77         else if (mapOpNames.count(*w))
  78         {
  79             // opcode, e.g. OP_ADD or ADD:
  80             result << mapOpNames[*w];
  81         }
  82         else
  83         {
  84             throw std::runtime_error("script parse error");
  85         }
  86     }
  87
  88     return result;
  89 }
  90
  91 bool DecodeHexTx(CMutableTransaction& tx, const std::string& strHexTx, bool fTryNoWitness)
  92 {
  93     if (!IsHex(strHexTx))
  94         return false;
  95
  96     std::vector<unsigned char> txData(ParseHex(strHexTx));
  97
  98     if (fTryNoWitness) {
  99         CDataStream ssData(txData, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS);
 100         try {
 101             ssData >> tx;
 102             if (ssData.eof()) {
 103                 return true;
 104             }
 105         }
 106         catch (const std::exception&) {
 107             // Fall through.
 108         }
 109     }
 110
 111     CDataStream ssData(txData, SER_NETWORK, PROTOCOL_VERSION);
 112     try {
 113         ssData >> tx;
 114         if (!ssData.empty())
 115             return false;
 116     }
 117     catch (const std::exception&) {
 118         return false;
 119     }
 120
 121     return true;
 122 }
 123
 124 bool DecodeHexBlk(CBlock& block, const std::string& strHexBlk)
 125 {
 126     if (!IsHex(strHexBlk))
 127         return false;
 128
 129     std::vector<unsigned char> blockData(ParseHex(strHexBlk));
 130     CDataStream ssBlock(blockData, SER_NETWORK, PROTOCOL_VERSION);
 131     try {
 132         ssBlock >> block;
 133     }
 134     catch (const std::exception&) {
 135         return false;
 136     }
 137
 138     return true;
 139 }
 140
 141 uint256 ParseHashUV(const UniValue& v, const std::string& strName)
 142 {
 143     std::string strHex;
 144     if (v.isStr())
 145         strHex = v.getValStr();
 146     return ParseHashStr(strHex, strName);  // Note: ParseHashStr("") throws a runtime_error
 147 }
 148
 149 uint256 ParseHashStr(const std::string& strHex, const std::string& strName)
 150 {
 151     if (!IsHex(strHex)) // Note: IsHex("") is false
 152         throw std::runtime_error(strName + " must be hexadecimal string (not '" + strHex + "')");
 153
 154     uint256 result;
 155     result.SetHex(strHex);
 156     return result;
 157 }
 158
 159 std::vector<unsigned char> ParseHexUV(const UniValue& v, const std::string& strName)
 160 {
 161     std::string strHex;
 162     if (v.isStr())
 163         strHex = v.getValStr();
 164     if (!IsHex(strHex))
 165         throw std::runtime_error(strName + " must be hexadecimal string (not '" + strHex + "')");
 166     return ParseHex(strHex);
 167 }