void Blowfish::ProcessBlock(const byte *in, byte *out) const
{
word32 left, right;
GetBlockBigEndian(in, left, right);
const word32 *const s=sbox;
const word32 *p=pbox;
left ^= p[0];
for (unsigned i=0; i<ROUNDS/2; i++)
{
right ^= (((s[GETBYTE(left,3)] + s[256+GETBYTE(left,2)])
^ s[2*256+GETBYTE(left,1)]) + s[3*256+GETBYTE(left,0)])
^ p[2*i+1];
left ^= (((s[GETBYTE(right,3)] + s[256+GETBYTE(right,2)])
^ s[2*256+GETBYTE(right,1)]) + s[3*256+GETBYTE(right,0)])
^ p[2*i+2];
}
right ^= p[ROUNDS+1];
PutBlockBigEndian(out, right, left);
}
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);
}
// 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);
}
