#ifndef BOTAN_DES_H__
#define BOTAN_DES_H__
#include "botan-1.6/include/base.h"
namespace Enctain {
namespace Botan {
class DES : public BlockCipher
{
public:
void clear() throw() { round_key.clear(); }
std::string name() const { return "DES"; }
BlockCipher* clone() const { return new DES; }
DES() : BlockCipher(8, 8) {}
private:
friend class TripleDES;
void enc(const byte[], byte[]) const;
void dec(const byte[], byte[]) const;
void key(const byte[], u32bit);
void raw_encrypt(u32bit&, u32bit&) const;
void raw_decrypt(u32bit&, u32bit&) const;
void round(u32bit&, u32bit, u32bit) const;
static void IP(u32bit&, u32bit&);
static void FP(u32bit&, u32bit&);
static const u32bit SPBOX1[256], SPBOX2[256], SPBOX3[256], SPBOX4[256],
SPBOX5[256], SPBOX6[256], SPBOX7[256], SPBOX8[256];
static const u64bit IPTAB1[256], IPTAB2[256], FPTAB1[256], FPTAB2[256];
SecureBuffer<u32bit, 32> round_key;
};
class TripleDES : public BlockCipher
{
public:
void clear() throw() { des1.clear(); des2.clear(); des3.clear(); }
std::string name() const { return "TripleDES"; }
BlockCipher* clone() const { return new TripleDES; }
TripleDES() : BlockCipher(8, 16, 24, 8) {}
private:
void enc(const byte[], byte[]) const;
void dec(const byte[], byte[]) const;
void key(const byte[], u32bit);
DES des1, des2, des3;
};
class DESX : public BlockCipher
{
public:
void clear() throw() { des.clear(); K1.clear(); K2.clear(); }
std::string name() const { return "DESX"; }
BlockCipher* clone() const { return new DESX; }
DESX() : BlockCipher(8, 24) {}
private:
void enc(const byte[], byte[]) const;
void dec(const byte[], byte[]) const;
void key(const byte[], u32bit);
SecureBuffer<byte, 8> K1, K2;
DES des;
};
}
}
#endif