you were right. thanks. and that wasnt the culprit, i was making length +4 more than it was somewhere i recoded the entire thing now, and it doesnt happen
On Jul 3, 9:01 pm, Jeffrey Walton <[email protected]> wrote: > > input + some bytes like 0x00 0xcd 0xcd 0xcd or > > 0x00 0xfd 0xfd 0xfd... > > This appears to be is uninitialized memory in a Debug build. I suspect > it is coming form Visual Studio, and not Crypto++. > > > string input = { some hex bytes }; > > Most likely the culprit > > Jeff > > On 7/3/09, rajkosto <[email protected]> wrote: > > > > > Hello, i use crypto++ for encrypting/decrypting with Twofish. > > The problem i have is, that after encrypting data, then decrypting > > that exact data, the padding remains. > > This is how i encrypt and decrypt > > > string input = { some hex bytes }; > > > CryptoPP::CBC_Mode<CryptoPP::Twofish>::Encryption TFEncryptGTC; > > > //Set IV > > TFEncryptGTC.Resynchronize(vector); > > > //encrypt > > string encrypted; > > CryptoPP::StringSource(input, true, new > > CryptoPP::StreamTransformationFilter(TFEncryptGTC, new > > CryptoPP::StringSink(encrypted))); > > > //After that, i do the reverse with the data i got after encrypting > > > CryptoPP::CBC_Mode<CryptoPP::Twofish>::Decryption TFDecryptGTC; > > > //Set IV (same as the one used for encryption ofcourse) > > TFDecryptGTC.Resynchronize(vector); > > > //decrypt > > string output; > > > CryptoPP::StringSource(encrypted, true, new > > CryptoPP::StreamTransformationFilter(TFDecryptGTC, new > > CryptoPP::StringSink(output))); > > > the output i get isnt the same as the input i put in ! instead, it's > > input + some bytes like 0x00 0xcd 0xcd 0xcd or 0x00 0xfd 0xfd 0xfd... > > > if i run this output through encryption and decryption again, i will > > get another trailing padding ! so it would have 2 times 0x00 0xcd 0xcd > > 0xcd at the end... > > > why isnt decryption removing the padding that streamtransformation > > added to perform encryption properly ? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the "Crypto++ Users" Google Group. To unsubscribe, send an email to [email protected]. More information about Crypto++ and this group is available at http://www.cryptopp.com. -~----------~----~----~----~------~----~------~--~---
