Hi Fraser,
Thanks for your quick reply. As per your suggestion I tried by removing
these two lines. But getting the same error message.
Also I tried to set the memory to zero as below.
memset( key, 0x01, CryptoPP::AES::DEFAULT_KEYLENGTH );
memset( iVector, 0x01, CryptoPP::AES::BLOCKSIZE );
It would be great if you could suggest any other alternative solutions.
Thanks,
Alok.
On Friday, November 1, 2013 1:23:32 AM UTC+5:30, Fraser wrote:
>
> Hi there,
>
> The cause of this error is where you have key[sizeof(key)] = 0;
> andiVector[sizeof(iVector)] = 0; in
> each of your functions. You're trying to access an element one past the
> end of each array.
>
> I guess you're trying to null-terminate these arrays, but there's no need
> here. In fact, it's valid for either the key or IV to contain '0' char(s)
> anywhere within.
>
> Cheers,
> Fraser.
>
>
>
> On 31/10/2013 14:03, Alok Sethi wrote:
>
> Hi,
>
> I want to encrypt and decrypt file contains using AES::CBC mode. I tried
> the following for encryption and decryption.
> It works fine but I get the below two exceptions.
>
> 1. Run-Time Check Failure #2 - Stack around the variable 'iVector' was
> corrupted.
> 2. Run-Time Check Failure #2 - Stack around the variable 'key' was
> corrupted.
>
> I don't know exactly where I am doing wrong. Please help me to fix this
> problem.
>
> To encrypt the file here is my code :-
> ==================================
> void Encrypt(string inFileName, string outFileName)
> {
>
> byte key[CryptoPP::AES::DEFAULT_KEYLENGTH];
> key[sizeof(key)] = 0;
>
> byte iVector[CryptoPP::AES::BLOCKSIZE];
> iVector[sizeof(iVector)] = 0;
>
> ifstream in(inFileName.c_str(), ios::binary);
>
> const string orgStrObj((istreambuf_iterator<char>(in)),
> istreambuf_iterator<char>());
> in.close();
>
> CryptoPP::AES::Encryption cipher(key, sizeof(key));
>
> CryptoPP::CBC_Mode_ExternalCipher::Encryption encryption(cipher,
> iVector);
> CryptoPP::StreamTransformationFilter strFilter(encryption, new
> CryptoPP::StringSink(encryptStr));
> strFilter.Put(reinterpret_cast<const byte*>(orgStrObj.c_str()),
> orgStrObj.size());
> strFilter.MessageEnd();
>
> ofstream out(outFileName.c_str(), ios::binary);
> out.write(encryptStr.c_str(), encryptStr.size());
> out.close();
> }
>
>
> To decrypt the file here is my code :-
> ================================
> void Crypto::Decrypt(string inFileName, string outFileName)
> {
> byte key[CryptoPP::AES::DEFAULT_KEYLENGTH];
> key[sizeof(key)] = 0;
>
> byte iVector[CryptoPP::AES::BLOCKSIZE];
> iVector[sizeof(iVector)] = 0;
>
> ifstream in(inFileName.c_str(), ios::binary);
>
> const string encryptStrObj((istreambuf_iterator<char>(in)),
> istreambuf_iterator<char>());
> in.close();
>
> CryptoPP::AES::Decryption cipher(key, sizeof(key));
>
> CryptoPP::CBC_Mode_ExternalCipher::Decryption decryption(cipher,
> iVector);
> CryptoPP::StreamTransformationFilter strFilter(decryption, new
> CryptoPP::StringSink(decryptStr));
> strFilter.Put(reinterpret_cast<const byte*>(encryptStrObj.c_str()),
> encryptStrObj.size());
> strFilter.MessageEnd();
>
> ofstream out(outFileName.c_str(), ios::binary);
> out.write(decryptStr.c_str(), decryptStr.size());
> out.close();
> }
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