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// 7zAes.h
#ifndef __CRYPTO_7Z_AES_H
#define __CRYPTO_7Z_AES_H
#include "Common/Buffer.h"
#include "Common/MyCom.h"
#include "Common/MyVector.h"
#include "../ICoder.h"
#include "../IPassword.h"
namespace NCrypto {
namespace NSevenZ {
const int kKeySize = 32;
class CKeyInfo
{
public:
int NumCyclesPower;
UInt32 SaltSize;
Byte Salt[16];
CByteBuffer Password;
Byte Key[kKeySize];
bool IsEqualTo(const CKeyInfo &a) const;
void CalculateDigest();
CKeyInfo() { Init(); }
void Init()
{
NumCyclesPower = 0;
SaltSize = 0;
for (int i = 0; i < sizeof(Salt); i++)
Salt[i] = 0;
}
};
class CKeyInfoCache
{
int Size;
CObjectVector<CKeyInfo> Keys;
public:
CKeyInfoCache(int size): Size(size) {}
bool Find(CKeyInfo &key);
// HRESULT Calculate(CKeyInfo &key);
void Add(CKeyInfo &key);
};
class CBase
{
CKeyInfoCache _cachedKeys;
protected:
CKeyInfo _key;
Byte _iv[16];
UInt32 _ivSize;
void CalculateDigest();
CBase();
};
class CBaseCoder:
public ICompressFilter,
public ICryptoSetPassword,
public CMyUnknownImp,
public CBase
{
protected:
CMyComPtr<ICompressFilter> _aesFilter;
virtual HRESULT CreateFilter() = 0;
#ifndef CRYPTO_AES
HRESULT CreateFilterFromDLL(REFCLSID clsID);
#endif
public:
STDMETHOD(Init)();
STDMETHOD_(UInt32, Filter)(Byte *data, UInt32 size);
STDMETHOD(CryptoSetPassword)(const Byte *data, UInt32 size);
};
#ifndef EXTRACT_ONLY
class CEncoder:
public CBaseCoder,
public ICompressWriteCoderProperties,
// public ICryptoResetSalt,
public ICryptoResetInitVector
{
virtual HRESULT CreateFilter();
public:
MY_UNKNOWN_IMP3(
ICryptoSetPassword,
ICompressWriteCoderProperties,
// ICryptoResetSalt,
ICryptoResetInitVector)
STDMETHOD(WriteCoderProperties)(ISequentialOutStream *outStream);
// STDMETHOD(ResetSalt)();
STDMETHOD(ResetInitVector)();
};
#endif
class CDecoder:
public CBaseCoder,
public ICompressSetDecoderProperties2
{
virtual HRESULT CreateFilter();
public:
MY_UNKNOWN_IMP2(
ICryptoSetPassword,
ICompressSetDecoderProperties2)
STDMETHOD(SetDecoderProperties2)(const Byte *data, UInt32 size);
};
}}
#endif
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