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author | Samuel Dobson <dobsonsa68@gmail.com> | 2021-10-12 15:19:00 +1300 |
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committer | Samuel Dobson <dobsonsa68@gmail.com> | 2021-10-12 15:32:11 +1300 |
commit | fbbbc594ad2f57969cd49d116f68547856d51359 (patch) | |
tree | 42b2efeb40631dabc69225d170ca2fb31f50a87f /src | |
parent | e418a8e675e4dbca9f9c3cf7dd4633aa3c6c196e (diff) | |
parent | fa43e7c2d9dc5e2df70acd2019bdd24023c1d333 (diff) | |
download | bitcoin-fbbbc594ad2f57969cd49d116f68547856d51359.tar.xz |
Merge bitcoin/bitcoin#23227: bitcoin-tx: Avoid treating integer overflow as OP_0
fa43e7c2d9dc5e2df70acd2019bdd24023c1d333 bitcoin-tx: Avoid treating overflow as OP_0 (MarcoFalke)
fa053c0019bc8b2174c485f4885f894f2b5de472 style: Fix whitespace in Parse* functions (MarcoFalke)
fa03dec7e98bdda8aa596ef7943cf0a8d0bcb127 refactor: Use C++11 range based for loop in ParseScript (MarcoFalke)
fad55e79ca18a5894a8da6db6309c323eecbb178 doc: Fixup ToIntegral docs (MarcoFalke)
Pull request description:
Seems odd to treat integer overflow as `OP_0`, so fix that.
ACKs for top commit:
theStack:
re-ACK fa43e7c2d9dc5e2df70acd2019bdd24023c1d333
shaavan:
ACK fa43e7c2d9dc5e2df70acd2019bdd24023c1d333
Tree-SHA512: 1bbe2de62d853badc18d57d169c6e78ddcdff037e5a85357995dead11c8e67a4fe35087e08a181c60753f8ce91058b7fcc06f5b7901afedc78fbacea8bc3ef4f
Diffstat (limited to 'src')
-rw-r--r-- | src/core_read.cpp | 53 | ||||
-rw-r--r-- | src/test/script_parse_tests.cpp | 2 | ||||
-rw-r--r-- | src/util/strencodings.h | 4 |
3 files changed, 25 insertions, 34 deletions
diff --git a/src/core_read.cpp b/src/core_read.cpp index 320811b9e9..2149b428d2 100644 --- a/src/core_read.cpp +++ b/src/core_read.cpp @@ -26,20 +26,20 @@ opcodetype ParseOpCode(const std::string& s) { static std::map<std::string, opcodetype> mapOpNames; - if (mapOpNames.empty()) - { - for (unsigned int op = 0; op <= MAX_OPCODE; op++) - { + if (mapOpNames.empty()) { + for (unsigned int op = 0; op <= MAX_OPCODE; op++) { // Allow OP_RESERVED to get into mapOpNames - if (op < OP_NOP && op != OP_RESERVED) + if (op < OP_NOP && op != OP_RESERVED) { continue; + } std::string strName = GetOpName(static_cast<opcodetype>(op)); - if (strName == "OP_UNKNOWN") + if (strName == "OP_UNKNOWN") { continue; + } mapOpNames[strName] = static_cast<opcodetype>(op); // Convenience: OP_ADD and just ADD are both recognized: - if (strName.compare(0, 3, "OP_") == 0) { // strName starts with "OP_" + if (strName.compare(0, 3, "OP_") == 0) { // strName starts with "OP_" mapOpNames[strName.substr(3)] = static_cast<opcodetype>(op); } } @@ -59,44 +59,35 @@ CScript ParseScript(const std::string& s) std::vector<std::string> words; boost::algorithm::split(words, s, boost::algorithm::is_any_of(" \t\n"), boost::algorithm::token_compress_on); - for (std::vector<std::string>::const_iterator w = words.begin(); w != words.end(); ++w) - { - if (w->empty()) - { + for (const std::string& w : words) { + if (w.empty()) { // Empty string, ignore. (boost::split given '' will return one word) - } - else if (std::all_of(w->begin(), w->end(), ::IsDigit) || - (w->front() == '-' && w->size() > 1 && std::all_of(w->begin()+1, w->end(), ::IsDigit))) + } else if (std::all_of(w.begin(), w.end(), ::IsDigit) || + (w.front() == '-' && w.size() > 1 && std::all_of(w.begin() + 1, w.end(), ::IsDigit))) { // Number - int64_t n = LocaleIndependentAtoi<int64_t>(*w); + const auto num{ToIntegral<int64_t>(w)}; - //limit the range of numbers ParseScript accepts in decimal - //since numbers outside -0xFFFFFFFF...0xFFFFFFFF are illegal in scripts - if (n > int64_t{0xffffffff} || n < -1 * int64_t{0xffffffff}) { + // limit the range of numbers ParseScript accepts in decimal + // since numbers outside -0xFFFFFFFF...0xFFFFFFFF are illegal in scripts + if (!num.has_value() || num > int64_t{0xffffffff} || num < -1 * int64_t{0xffffffff}) { throw std::runtime_error("script parse error: decimal numeric value only allowed in the " "range -0xFFFFFFFF...0xFFFFFFFF"); } - result << n; - } - else if (w->substr(0,2) == "0x" && w->size() > 2 && IsHex(std::string(w->begin()+2, w->end()))) - { + result << num.value(); + } else if (w.substr(0, 2) == "0x" && w.size() > 2 && IsHex(std::string(w.begin() + 2, w.end()))) { // Raw hex data, inserted NOT pushed onto stack: - std::vector<unsigned char> raw = ParseHex(std::string(w->begin()+2, w->end())); + std::vector<unsigned char> raw = ParseHex(std::string(w.begin() + 2, w.end())); result.insert(result.end(), raw.begin(), raw.end()); - } - else if (w->size() >= 2 && w->front() == '\'' && w->back() == '\'') - { + } else if (w.size() >= 2 && w.front() == '\'' && w.back() == '\'') { // Single-quoted string, pushed as data. NOTE: this is poor-man's // parsing, spaces/tabs/newlines in single-quoted strings won't work. - std::vector<unsigned char> value(w->begin()+1, w->end()-1); + std::vector<unsigned char> value(w.begin() + 1, w.end() - 1); result << value; - } - else - { + } else { // opcode, e.g. OP_ADD or ADD: - result << ParseOpCode(*w); + result << ParseOpCode(w); } } diff --git a/src/test/script_parse_tests.cpp b/src/test/script_parse_tests.cpp index 5b8b6a725f..004c1a9a84 100644 --- a/src/test/script_parse_tests.cpp +++ b/src/test/script_parse_tests.cpp @@ -38,7 +38,6 @@ BOOST_AUTO_TEST_CASE(parse_script) {"'17'", "023137"}, {"ELSE", "67"}, {"NOP10", "b9"}, - {"11111111111111111111", "00"}, }; std::string all_in; std::string all_out; @@ -49,6 +48,7 @@ BOOST_AUTO_TEST_CASE(parse_script) } BOOST_CHECK_EQUAL(HexStr(ParseScript(all_in)), all_out); + BOOST_CHECK_EXCEPTION(ParseScript("11111111111111111111"), std::runtime_error, HasReason("script parse error: decimal numeric value only allowed in the range -0xFFFFFFFF...0xFFFFFFFF")); BOOST_CHECK_EXCEPTION(ParseScript("11111111111"), std::runtime_error, HasReason("script parse error: decimal numeric value only allowed in the range -0xFFFFFFFF...0xFFFFFFFF")); BOOST_CHECK_EXCEPTION(ParseScript("OP_CHECKSIGADD"), std::runtime_error, HasReason("script parse error: unknown opcode")); } diff --git a/src/util/strencodings.h b/src/util/strencodings.h index 1f7762aeef..eedb5ec2f8 100644 --- a/src/util/strencodings.h +++ b/src/util/strencodings.h @@ -72,7 +72,7 @@ void SplitHostPort(std::string in, uint16_t& portOut, std::string& hostOut); // LocaleIndependentAtoi is provided for backwards compatibility reasons. // -// New code should use the ParseInt64/ParseUInt64/ParseInt32/ParseUInt32 functions +// New code should use ToIntegral or the ParseInt* functions // which provide parse error feedback. // // The goal of LocaleIndependentAtoi is to replicate the exact defined behaviour @@ -125,7 +125,7 @@ constexpr inline bool IsSpace(char c) noexcept { /** * Convert string to integral type T. Leading whitespace, a leading +, or any * trailing character fail the parsing. The required format expressed as regex - * is `-?[0-9]+`. + * is `-?[0-9]+`. The minus sign is only permitted for signed integer types. * * @returns std::nullopt if the entire string could not be parsed, or if the * parsed value is not in the range representable by the type T. |