Crypto++, _BLOCK_TYPE_IS_VALID error

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C++

Windows

Visual-Studio

errors

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Hi, I have copied this piece of code from another site and have trouble compiling it; I'm new to cryptography and whilst I tried my best to get this to work, i keep getting "Expression: _BLOCK_TYPE_IS_VALID(pHead->nBlockUse)" I know this error has to do with the heap but I didn't perform any Delete in these few lines of code.

#include "dll.h" 
#include "modes.h"
#include "aes.h"
#include "filters.h"
#include "iostream"
#include "cryptlib.h"


int main(int argc, char* argv[]) {


    //
    // Key and IV setup
    //
	
    byte key[ CryptoPP::AES::DEFAULT_KEYLENGTH ], iv[ CryptoPP::AES::BLOCKSIZE ];
    memset( key, 0x00, CryptoPP::AES::DEFAULT_KEYLENGTH );
    memset( iv, 0x00, CryptoPP::AES::BLOCKSIZE );


    //
    // String and Sink setup
    //
    std::string plaintext = "Now is the time for all good men to come to the aide...";
    string ciphertext;
    std::string decryptedtext;

    //
    // Dump Plain Text
    //
    std::cout << "Plain Text (" << plaintext.size() << " bytes)" <<    std::endl;
    std::cout << plaintext;
    std::cout << std::endl << std::endl;

    //
    // Create Cipher Text
    //
	
	CryptoPP::AES::Encryption aesEncryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
    CryptoPP::CBC_Mode_ExternalCipher::Encryption cbcEncryption( aesEncryption, iv );

    CryptoPP::StreamTransformationFilter stfEncryptor(cbcEncryption, new CryptoPP::StringSink(     ciphertext ) ); 
    stfEncryptor.Put( reinterpret_cast<const unsigned char*>( plaintext.c_str() ), plaintext.length() + 1   );
    stfEncryptor.MessageEnd();


	

	
    //
    // Dump Cipher Text
    //
    std::cout << "Cipher Text (" << ciphertext.size() << " bytes)" << std::endl;

    for( unsigned int i = 0; i < ciphertext.size(); i++ ) {

        std::cout << "0x" << std::hex << (0xFF & static_cast<byte>(ciphertext[i])) << " ";
    }

    std::cout << std::endl << std::endl;

    //
    // Decrypt
    //
    
	CryptoPP::AES::Decryption aesDecryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
    CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv );

    CryptoPP::StreamTransformationFilter * stfDecryptor=new  CryptoPP::StreamTransformationFilter(cbcDecryption, new CryptoPP::StringSink( decryptedtext  ) );
    stfDecryptor->Put( reinterpret_cast<const unsigned char*>( ciphertext.c_str() ), ciphertext.size() );
    stfDecryptor->MessageEnd();

    //
    // Dump Decrypted Text
    //
	
    std::cout << "Decrypted Text: " << std::endl;
    std::cout << decryptedtext;
    std::cout << std::endl << std::endl;

	

    return 0;
}

While it is worth mentioning if I comment these two lines I don't get the heap error anymore

stfEncryptor.Put( reinterpret_cast<const unsigned char*>( plaintext.c_str() ), plaintext.length() + 1   );
    stfEncryptor.MessageEnd();

I did try to debug it, and the error pops right before the last return 0, I think while the class Destructor is being called the de-allocation is causing this issue?


Any help would be greatly appreciated.