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Detect string length overflows

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This commit is contained in:
Benoit Blanchon
2023-10-09 11:58:02 +02:00
parent 9b34069a3b
commit 6fe4b9c01d
5 changed files with 67 additions and 6 deletions
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23
extras/tests/MsgPackDeserializer/errors.cpp
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@ -240,3 +240,26 @@ TEST_CASE("deserializeMsgPack() replaces unsupported types by null") {
20) == "[null,42]");
}
}
TEST_CASE("deserializeMsgPack() returns NoMemory is string length overflows") {
JsonDocument doc;
auto maxLength = ArduinoJson::detail::StringNode::maxLength;
SECTION("max length should succeed") {
auto len = maxLength;
std::string prefix = {'\xdb', char(len >> 24), char(len >> 16),
char(len >> 8), char(len)};
auto err = deserializeMsgPack(doc, prefix + std::string(len, 'a'));
REQUIRE(err == DeserializationError::Ok);
}
SECTION("one above max length should fail") {
auto len = maxLength + 1;
std::string prefix = {'\xdb', char(len >> 24), char(len >> 16),
char(len >> 8), char(len)};
auto err = deserializeMsgPack(doc, prefix + std::string(len, 'a'));
REQUIRE(err == DeserializationError::NoMemory);
}
}