mux/src/crypt/crypt.cpp File Reference

#include "ufc-crypt.h"
#include "crypt.h"
#include "crypt-private.h"

Include dependency graph for crypt.cpp:

Go to the source code of this file.

Defines
#define	SBA(sb, v)   (*(long32*)((char*)(sb)+(v)))
Functions
void	_ufc_doit_r (ufc_long itr, struct crypt_data *__data, ufc_long *res)

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Define Documentation

#define SBA	(	sb,
		v		)	(*(long32*)((char*)(sb)+(v)))

Definition at line 37 of file crypt.cpp.

Referenced by _ufc_doit_r().

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Function Documentation

void _ufc_doit_r	(	ufc_long	itr,
		struct crypt_data *	__data,
		ufc_long *	res
	)

Definition at line 40 of file crypt.cpp.

References crypt_data::keysched, crypt_data::sb0, crypt_data::sb2, and SBA.

Referenced by __encrypt_r(), and crypt_r().

{
  int i;
  long32 s, *k;
  long32 *sb01 = (long32*)__data->sb0;
  long32 *sb23 = (long32*)__data->sb2;
  long32 l1, l2, r1, r2;

  l1 = (long32)res[0]; l2 = (long32)res[1];
  r1 = (long32)res[2]; r2 = (long32)res[3];

  while(itr--) {
    k = (long32*)__data->keysched;
    for(i=8; i--; ) {
      s = *k++ ^ r1;
      l1 ^= SBA(sb01, s & 0xffff); l2 ^= SBA(sb01, (s & 0xffff)+4);
      l1 ^= SBA(sb01, s >>= 16  ); l2 ^= SBA(sb01, (s         )+4);
      s = *k++ ^ r2;
      l1 ^= SBA(sb23, s & 0xffff); l2 ^= SBA(sb23, (s & 0xffff)+4);
      l1 ^= SBA(sb23, s >>= 16  ); l2 ^= SBA(sb23, (s         )+4);

      s = *k++ ^ l1;
      r1 ^= SBA(sb01, s & 0xffff); r2 ^= SBA(sb01, (s & 0xffff)+4);
      r1 ^= SBA(sb01, s >>= 16  ); r2 ^= SBA(sb01, (s         )+4);
      s = *k++ ^ l2;
      r1 ^= SBA(sb23, s & 0xffff); r2 ^= SBA(sb23, (s & 0xffff)+4);
      r1 ^= SBA(sb23, s >>= 16  ); r2 ^= SBA(sb23, (s         )+4);
    }
    s=l1; l1=r1; r1=s; s=l2; l2=r2; r2=s;
  }
  res[0] = l1; res[1] = l2; res[2] = r1; res[3] = r2;
}

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