KviCryptEngine::DecryptResult KviRijndaelEngine::decrypt(const char * inBuffer, KviCString & plainText)
{
if(!m_pDecryptCipher)
{
setLastError(__tr2qs("Oops! Decryption cipher not initialized"));
return KviCryptEngine::DecryptError;
}
if(*inBuffer != KviControlCodes::CryptEscape)
{
plainText = inBuffer;
return KviCryptEngine::DecryptOkWasPlainText;
}
inBuffer++;
if(!*inBuffer)
{
plainText = inBuffer;
return KviCryptEngine::DecryptOkWasPlainText; // empty buffer
}
int len;
char * binary;
if(!asciiToBinary(inBuffer, &len, &binary))
return KviCryptEngine::DecryptError;
char * buf = (char *)KviMemory::allocate(len + 1);
unsigned char * iv = nullptr;
if(m_bEncryptMode == CBC)
{
// extract the IV from the cyphered string
len -= MAX_IV_SIZE;
iv = (unsigned char *)KviMemory::allocate(MAX_IV_SIZE);
KviMemory::move(iv, binary, MAX_IV_SIZE);
KviMemory::move(binary, binary + MAX_IV_SIZE, len);
binary = (char *)KviMemory::reallocate(binary, len);
}
int retVal = m_pDecryptCipher->padDecrypt((const unsigned char *)binary, len, (unsigned char *)buf, iv);
KviMemory::free(binary);
KviMemory::free(iv);
if(retVal < 0)
{
KviMemory::free(buf);
setLastErrorFromRijndaelErrorCode(retVal);
return KviCryptEngine::DecryptError;
}
buf[retVal] = '\0';
plainText = buf;
KviMemory::free(buf);
return KviCryptEngine::DecryptOkWasEncrypted;
}
/*-----MAIN------*/
int main (void)
{
int optionStats[NUM_OPTION_STATS];
int optionChoice = 0;
char sel[ 1 + EXTRA_SPACES ];
char* prompt = "Please enter a selection: ";
char *p;
while (optionChoice != EXIT_OPTION )
{
/*prints the main menu */
printMenu();
/*gets user input as a string */
getString(sel, 1 + EXTRA_SPACES, prompt);
optionChoice = strtol(sel, &p, 10);
switch (optionChoice)
{
case PERFECT_SQUARES_OPTION : printf("option 1 selected \n");
perfectSquares(optionStats);
break;
case ASCII_TO_BINARY_OPTION : printf("option 2 selected \n");
asciiToBinary(optionStats);
break;
case MATCHING_BRACKETS_OPTION : printf("option 3 selected \n");
matchingBrackets(optionStats);
break;
case TIC_TAC_OPTION : printf("option 4 selected \n");
ticTacToeGame(optionStats);
break;
case FORMAT_OPTION : printf("Option 5 selected \n");
formattingText(optionStats);
break;
case SUMMARY_OPTION : printf("Option 6 selected \n");
sessionSummary(optionStats);
break;
}
}
return EXIT_SUCCESS;
}