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// Crypto/AES/MyAES.cpp
#include "StdAfx.h"
#include "windows.h"
#include "MyAES.h"
#include "Windows/Defs.h"
#include "AES_CBC.h"
static const int kAESBlockSize = 16;
extern "C"
{
#include "aesopt.h"
}
class CTabInit
{
public:
CTabInit() { gen_tabs();}
} g_TabInit;
STDMETHODIMP CAESFilter::Init() { return S_OK; }
STDMETHODIMP_(UInt32) CAESFilter::Filter(Byte *data, UInt32 size)
{
if (size > 0 && size < kAESBlockSize)
return kAESBlockSize;
UInt32 i;
for (i = 0; i + kAESBlockSize <= size; i += kAESBlockSize)
{
Byte outBlock[kAESBlockSize];
SubFilter(data + i, outBlock);
for (int j = 0; j < kAESBlockSize; j++)
data[i + j] = outBlock[j];
}
return i;
}
STDMETHODIMP CAESFilter::SetInitVector(const Byte *data, UInt32 size)
{
if (size != 16)
return E_INVALIDARG;
AES.Init(data);
return S_OK;
}
STDMETHODIMP CAESEncoder::SetKey(const Byte *data, UInt32 size)
{ return (AES.enc_key(data, size) == aes_good) ? S_OK: E_FAIL; }
void CAESEncoder::SubFilter(const Byte *inBlock, Byte *outBlock)
{ AES.Encode(inBlock, outBlock); }
STDMETHODIMP CAESDecoder::SetKey(const Byte *data, UInt32 size)
{ return (AES.dec_key(data, size) == aes_good) ? S_OK: E_FAIL; }
void CAESDecoder::SubFilter(const Byte *inBlock, Byte *outBlock)
{ AES.Decode(inBlock, outBlock); }
////////////////////////////
// ECB mode
STDMETHODIMP CAesEcbFilter::Init() { return S_OK; }
STDMETHODIMP CAesEcbFilter::SetInitVector(const Byte * /* data */, UInt32 size)
{ return (size == 0) ? S_OK: E_INVALIDARG; }
STDMETHODIMP_(UInt32) CAesEcbFilter::Filter(Byte *data, UInt32 size)
{
if (size > 0 && size < kAESBlockSize)
return kAESBlockSize;
UInt32 i;
for (i = 0; i + kAESBlockSize <= size; i += kAESBlockSize)
{
Byte outBlock[kAESBlockSize];
SubFilter(data + i, outBlock);
for (int j = 0; j < kAESBlockSize; j++)
data[i + j] = outBlock[j];
}
return i;
}
STDMETHODIMP CAesEcbEncoder::SetKey(const Byte *data, UInt32 size)
{ return (AES.enc_key(data, size) == aes_good) ? S_OK: E_FAIL; }
void CAesEcbEncoder::SubFilter(const Byte *inBlock, Byte *outBlock)
{ AES.enc_blk(inBlock, outBlock); }
STDMETHODIMP CAesEcbDecoder::SetKey(const Byte *data, UInt32 size)
{ return (AES.dec_key(data, size) == aes_good) ? S_OK: E_FAIL; }
void CAesEcbDecoder::SubFilter(const Byte *inBlock, Byte *outBlock)
{ AES.dec_blk(inBlock, outBlock); }
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