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Add better sanity check to test/Metadata

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This commit is contained in:
Alex Beregszaszi 2019-02-05 22:57:25 +00:00
parent 43ccc75293
commit 532c55acbd
1 changed files with 5 additions and 1 deletions
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6
test/Metadata.cpp
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@ -37,7 +37,11 @@ bytes bytecodeSansMetadata(bytes const& _bytecode)
if (size < 5)
return bytes{};
size_t metadataSize = (_bytecode[size - 2] << 8) + _bytecode[size - 1];
if (metadataSize != 0x29 || size < (metadataSize + 2))
if (size < (metadataSize + 2))
return bytes{};
// Sanity check: assume the first byte is a fixed-size CBOR array with either 1 or 2 entries
unsigned char firstByte = _bytecode[size - metadataSize - 2];
if (firstByte != 0xa1 && firstByte != 0xa2)
return bytes{};
return bytes(_bytecode.begin(), _bytecode.end() - metadataSize - 2);
}