Hi,
It started working after I commented out the AlgorithmParameters params
line.
I thought the d.SetKey(..) change would fix it, but it didn't seem to.
On Thursday, October 12, 2023 at 5:55:44 PM UTC-4 Dwight Kulkarni wrote:
Hello,
I had Crypto PP code that was previously working and recently stopped
working. We moved to a new version of our BSP.
Error is:
terminate called after throwing an instance of
'CryptoPP::AlgorithmParametersBase::ParameterNotUsed'
what(): AlgorithmParametersBase: parameter "IV" not used
Error is traced to this particular function below.
I had it running with the Params in ECB mode still passing in the IV.
d.SetKey(key, key.size(),params);
Then I commented it out with:
d.SetKey(key, key.size());
Previously, it wasn't throwing an error even if IV is passed in ECB mode.
Also, I don't know why it's falling through the catch statement and kills
my program.
should I have a generic catch statement Exception e to prevent this ?
std::string decrypt_aes(std::string cipherbytes, SecByteBlock key,
SecByteBlock iv) {
try {
AlgorithmParameters params = MakeParameters(Name::FeedbackSize(), 1
/*8-bits*/)
(Name::IV(), ConstByteArrayParameter(iv));
//CFB_Mode<AES>::Decryption d;
ECB_Mode<AES>::Decryption d;
std::string recovered;
//d.SetKey(key, key.size(),params);
d.SetKey(key, key.size());
StringSource s(cipherbytes, true, new StreamTransformationFilter(d, new
StringSink(recovered), CryptoPP::BlockPaddingSchemeDef::PKCS_PADDING));
return recovered;
}
catch (CryptoPP::Exception e) {
std::cerr << e.what() << std::endl;
return "";
}
}
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