torch::Data Bz2::Decompress(const torch::Data &data)
{
const int size100k = 100000;
int bufsize = size100k * Bz2::block100k;
int status = 0;
bz_stream stream = {0};
Data buf(bufsize);
Data dst;
dst.HiddenAlloc(data.GetSize() * 2);
/* next_in should point at the data to be compressed
* avail_in should indicate how many bytes the library may read
* BZ2_bzDecompress updates next_in, avail_in and total_in to reflect the number of bytes it has read */
stream.next_in = (char*) data.GetBytes();
stream.avail_in = (int)data.GetSize();
/* next_out should point to a buffer in which the compressed data is to be placed
* avail_out indicating how much output space is available.
* BZ2_bzDecompress updates next_out, avail_out and total_out to reflect the number of bytes output. */
stream.next_out = (char*)buf.GetBytes();
stream.avail_out = (int)buf.GetSize();
status = BZ2_bzDecompressInit(&stream, 0, 0);
if (status != BZ_OK) {
BZ2_bzDecompressEnd(&stream);
return dst;
}
do {
status = BZ2_bzDecompress(&stream);
if (status != BZ_OK && status != BZ_STREAM_END)
break;
dst.Append(buf.GetBytes(), bufsize - stream.avail_out);
stream.next_out = (char*)buf.GetBytes();
stream.avail_out = (int)buf.GetSize();
}while (status != BZ_STREAM_END);
BZ2_bzDecompressEnd(&stream);
return dst;
}
void RC4::CryptoNoCopy(torch::Data &input)
{
arc4_setup(&m_rc4ctx, (unsigned char *)m_skey.GetBytes(), (int)m_skey.GetSize());
arc4_crypt(&m_rc4ctx, (unsigned char*)input.GetBytes(), (int)input.GetSize());
}
torch::Data AES::DecryptWithCopy(const torch::Data &input)
{
return this->DecryptWithCopy((unsigned char*)input.GetBytes(), (int)input.GetSize());
}