On Feb 2, 5:47 pm, Chirag Shah <[email protected]> wrote:
> Hi Jeffery,
>
> Thanks for your reply but i want to clarify one more thing.
> If i have binary data buffer / file length is of i.e. 50 bytes, then
> do i need to take care of chopping my data in 16 bytes for first three
> Put() calls with NO_PADDING and last Put() call with padding enabled
> OR i can simply give 50 byte buffer into Put() call with padding
> enabled as its(50) not multiple of 16.
// const size_t size = 16 * 4 + 1;
const size_t size = 16 * 4;
string plain(size, 0x00);
for(size_t i = 0; i < size; i++)
plain[i] = 'A' + (i%26);
// cout << plain << endl;
byte key[AES::DEFAULT_KEYLENGTH], iv[AES::BLOCKSIZE];
memset(key, 0x00, sizeof(key));
memset(iv, 0x00, sizeof(iv));
CBC_Mode < AES >::Encryption aes(key, sizeof(key), iv);
StreamTransformationFilter encryptor(
aes, NULL, BlockPaddingSchemeDef::NO_PADDING
);
for(size_t j = 0; j < size; j++)
encryptor.Put((byte)plain[j]);
encryptor.MessageEnd();
size_t ready = encryptor.MaxRetrievable();
// cout << ready << endl;
string cipher(ready, 0x00);
encryptor.Get((byte*) &cipher[0], cipher.size());
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