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bitcoin-tx: Avoid treating overflow as OP_0

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MarcoFalke 2021-10-08 15:51:55 +02:00
parent fa053c0019
commit fa43e7c2d9
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GPG key ID: CE2B75697E69A548
3 changed files with 10 additions and 4 deletions
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6
src/core_read.cpp
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@ -66,16 +66,16 @@ CScript ParseScript(const std::string& s)
(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}) {
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;
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()));

2
src/test/script_parse_tests.cpp
View file

@ -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"));
}

6
test/util/data/bitcoin-util-test.json
View file

@ -294,6 +294,12 @@
"output_cmp": "txcreatescript4.json",
"description": "Create a new transaction with a single output script (OP_DROP) in a P2SH, wrapped in a P2SH (output as json)"
},
{ "exec": "./bitcoin-tx",
"args": ["-create", "outscript=0:999999999999999999999999999999"],
"return_code": 1,
"error_txt": "error: script parse error: decimal numeric value only allowed in the range -0xFFFFFFFF...0xFFFFFFFF",
"description": "Try to parse an output script with a decimal number above the allowed range"
},
{ "exec": "./bitcoin-tx",
"args": ["-create", "outscript=0:9999999999"],
"return_code": 1,