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Show buffer overflow in cryptopp_aes128_cbc test #5480

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Show buffer overflow in cryptopp_aes128_cbc test #5480

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12 changes: 8 additions & 4 deletions test/unittests/libdevcrypto/crypto.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -732,18 +732,22 @@ BOOST_AUTO_TEST_CASE(cryptopp_aes128_cbc)


// plaintext whose size isn't divisible by block size must use stream filter for padding
constexpr size_t size = 192 / 8;
string string192("AAAAAAAAAAAAAAAABBBBBBBB");
plainOriginal = string192;
char output[size + 1];
output[size] = 0x1e;

string cipher;
CryptoPP::StreamTransformationFilter* aesStream = new CryptoPP::StreamTransformationFilter(cbcEncryption, new CryptoPP::StringSink(cipher));
auto* aesStream = new CryptoPP::StreamTransformationFilter(cbcEncryption, new CryptoPP::StringSink(cipher));
CryptoPP::StringSource source(string192, true, aesStream);
BOOST_REQUIRE(cipher.size() == 32);

byte* pOut = reinterpret_cast<byte*>(&string192[0]);
byte* pOut = reinterpret_cast<byte*>(&output[0]);
byte const* pIn = reinterpret_cast<byte const*>(cipher.data());
BOOST_CHECK(output[size] == 0x1e);
cbcDecryption.ProcessData(pOut, pIn, cipher.size());
BOOST_REQUIRE(string192 == plainOriginal);
BOOST_CHECK(output[size] == 0x1e); // Buffer overflow.
BOOST_CHECK(string192 == std::string(output, size));
}

BOOST_AUTO_TEST_CASE(recoverVgt3)
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