void DES::ProcessAndXorBlock(const byte* in, const byte* xOr, byte* out) const
{
word32 l,r;
Block::Get(in)(l)(r);
IPERM(l,r);
RawProcessBlock(l, r);
FPERM(l,r);
Block::Put(xOr, out)(r)(l);
}
void DES_EDE3_Decryption::ProcessBlock(const byte *inBlock, byte *outBlock) const
{
word32 l,r;
GetBlockBigEndian(inBlock, l, r);
IPERM(l,r);
d3.RawProcessBlock(l, r);
e2.RawProcessBlock(r, l);
d1.RawProcessBlock(l, r);
FPERM(l,r);
PutBlockBigEndian(outBlock, r, l);
}
void DES_EDE3::ProcessAndXorBlock(const byte* in, const byte* xOr,
byte* out) const
{
word32 l,r;
Block::Get(in)(l)(r);
IPERM(l,r);
des1_.RawProcessBlock(l, r);
des2_.RawProcessBlock(r, l);
des3_.RawProcessBlock(l, r);
FPERM(l,r);
Block::Put(xOr, out)(r)(l);
}
static void DesProcessBlock(Des* des, const byte* in, byte* out)
{
word32 l, r;
XMEMCPY(&l, in, sizeof(l));
XMEMCPY(&r, in + sizeof(l), sizeof(r));
#ifdef LITTLE_ENDIAN_ORDER
l = ByteReverseWord32(l);
r = ByteReverseWord32(r);
#endif
IPERM(&l,&r);
DesRawProcessBlock(&l, &r, des->key);
FPERM(&l,&r);
#ifdef LITTLE_ENDIAN_ORDER
l = ByteReverseWord32(l);
r = ByteReverseWord32(r);
#endif
XMEMCPY(out, &r, sizeof(r));
XMEMCPY(out + sizeof(r), &l, sizeof(l));
}
static void Des3ProcessBlock(Des3* des, const byte* in, byte* out)
{
word32 l, r;
memcpy(&l, in, sizeof(l));
memcpy(&r, in + sizeof(l), sizeof(r));
#ifdef LITTLE_ENDIAN_ORDER
l = ByteReverseWord32(l);
r = ByteReverseWord32(r);
#endif
IPERM(&l,&r);
DesRawProcessBlock(&l, &r, des->key[0]);
DesRawProcessBlock(&r, &l, des->key[1]);
DesRawProcessBlock(&l, &r, des->key[2]);
FPERM(&l,&r);
#ifdef LITTLE_ENDIAN_ORDER
l = ByteReverseWord32(l);
r = ByteReverseWord32(r);
#endif
memcpy(out, &r, sizeof(r));
memcpy(out + sizeof(r), &l, sizeof(l));
}
// Encrypt or decrypt a block of data in ECB mode
void DES::ProcessBlock(const byte *inBlock, byte * outBlock) const
{
word32 l,r;
GetBlockBigEndian(inBlock, l, r);
IPERM(l,r);
const word32 *kptr=k;
for (unsigned i=0; i<8; i++)
{
word32 work = rotrFixed(r, 4U) ^ kptr[4*i+0];
l ^= Spbox[6][(work) & 0x3f]
^ Spbox[4][(work >> 8) & 0x3f]
^ Spbox[2][(work >> 16) & 0x3f]
^ Spbox[0][(work >> 24) & 0x3f];
work = r ^ kptr[4*i+1];
l ^= Spbox[7][(work) & 0x3f]
^ Spbox[5][(work >> 8) & 0x3f]
^ Spbox[3][(work >> 16) & 0x3f]
^ Spbox[1][(work >> 24) & 0x3f];
work = rotrFixed(l, 4U) ^ kptr[4*i+2];
r ^= Spbox[6][(work) & 0x3f]
^ Spbox[4][(work >> 8) & 0x3f]
^ Spbox[2][(work >> 16) & 0x3f]
^ Spbox[0][(work >> 24) & 0x3f];
work = l ^ kptr[4*i+3];
r ^= Spbox[7][(work) & 0x3f]
^ Spbox[5][(work >> 8) & 0x3f]
^ Spbox[3][(work >> 16) & 0x3f]
^ Spbox[1][(work >> 24) & 0x3f];
}
FPERM(l,r);
PutBlockBigEndian(outBlock, r, l);
}