stream.c

这是一个LINUX环境的 VDR 插件源代码,可支持Irdeto, Seca, Viaccess, Nagra, Conax & Cryptoworks等CA系统的读卡、共享等操作。

/* FFdecsa -- fast decsa algorithm
 *
 * Copyright (C) 2003-2004  fatih89r
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */



// define statics only once, when STREAM_INIT
#ifdef STREAM_INIT
struct stream_regs {
  group A[32+10][4]; // 32 because we will move back (virtual shift register)
  group B[32+10][4]; // 32 because we will move back (virtual shift register)
  group X[4];
  group Y[4];
  group Z[4];
  group D[4];
  group E[4];
  group F[4];
  group p;
  group q;
  group r;
  };

static inline void trasp64_32_88ccw(unsigned char *data){
/* 64 rows of 32 bits transposition (bytes transp. - 8x8 rotate counterclockwise)*/
#define row ((unsigned int *)data)
  int i,j;
  for(j=0;j<64;j+=32){
    unsigned int t,b;
    for(i=0;i<16;i++){
      t=row[j+i];
      b=row[j+16+i];
      row[j+i]   = (t&0x0000ffff)      | ((b           )<<16);
      row[j+16+i]=((t           )>>16) |  (b&0xffff0000) ;
    }
  }
  for(j=0;j<64;j+=16){
    unsigned int t,b;
    for(i=0;i<8;i++){
      t=row[j+i];
      b=row[j+8+i];
      row[j+i]   = (t&0x00ff00ff)     | ((b&0x00ff00ff)<<8);
      row[j+8+i] =((t&0xff00ff00)>>8) |  (b&0xff00ff00);
    }
  }
  for(j=0;j<64;j+=8){
    unsigned int t,b;
    for(i=0;i<4;i++){
      t=row[j+i];
      b=row[j+4+i];
      row[j+i]   =((t&0x0f0f0f0f)<<4) |  (b&0x0f0f0f0f);
      row[j+4+i] = (t&0xf0f0f0f0)     | ((b&0xf0f0f0f0)>>4);
    }
  }
  for(j=0;j<64;j+=4){
    unsigned int t,b;
    for(i=0;i<2;i++){
      t=row[j+i];
      b=row[j+2+i];
      row[j+i]   =((t&0x33333333)<<2) |  (b&0x33333333);
      row[j+2+i] = (t&0xcccccccc)     | ((b&0xcccccccc)>>2);
    }
  }
  for(j=0;j<64;j+=2){
    unsigned int t,b;
    for(i=0;i<1;i++){
      t=row[j+i];
      b=row[j+1+i];
      row[j+i]   =((t&0x55555555)<<1) |  (b&0x55555555);
      row[j+1+i] = (t&0xaaaaaaaa)     | ((b&0xaaaaaaaa)>>1);
    }
  }
#undef row
}

static inline void trasp64_32_88cw(unsigned char *data){
/* 64 rows of 32 bits transposition (bytes transp. - 8x8 rotate clockwise)*/
#define row ((unsigned int *)data)
  int i,j;
  for(j=0;j<64;j+=32){
    unsigned int t,b;
    for(i=0;i<16;i++){
      t=row[j+i];
      b=row[j+16+i];
      row[j+i]   = (t&0x0000ffff)      | ((b           )<<16);
      row[j+16+i]=((t           )>>16) |  (b&0xffff0000) ;
    }
  }
  for(j=0;j<64;j+=16){
    unsigned int t,b;
    for(i=0;i<8;i++){
      t=row[j+i];
      b=row[j+8+i];
      row[j+i]   = (t&0x00ff00ff)     | ((b&0x00ff00ff)<<8);
      row[j+8+i] =((t&0xff00ff00)>>8) |  (b&0xff00ff00);
    }
  }
  for(j=0;j<64;j+=8){
    unsigned int t,b;
    for(i=0;i<4;i++){
      t=row[j+i];
      b=row[j+4+i];
      row[j+i]  =((t&0xf0f0f0f0)>>4) |   (b&0xf0f0f0f0);
      row[j+4+i]= (t&0x0f0f0f0f)     |  ((b&0x0f0f0f0f)<<4);
    }
  }
  for(j=0;j<64;j+=4){
    unsigned int t,b;
    for(i=0;i<2;i++){
      t=row[j+i];
      b=row[j+2+i];
      row[j+i]  =((t&0xcccccccc)>>2) |  (b&0xcccccccc);
      row[j+2+i]= (t&0x33333333)     | ((b&0x33333333)<<2);
    }
  }
  for(j=0;j<64;j+=2){
    unsigned int t,b;
    for(i=0;i<1;i++){
      t=row[j+i];
      b=row[j+1+i];
      row[j+i]  =((t&0xaaaaaaaa)>>1) |  (b&0xaaaaaaaa);
      row[j+1+i]= (t&0x55555555)     | ((b&0x55555555)<<1);
    }
  }
#undef row
}

//64-64----------------------------------------------------------
static inline void trasp64_64_88ccw(unsigned char *data){
/* 64 rows of 64 bits transposition (bytes transp. - 8x8 rotate counterclockwise)*/
#define row ((unsigned long long int *)data)
  int i,j;
  for(j=0;j<64;j+=64){
    unsigned long long int t,b;
    for(i=0;i<32;i++){
      t=row[j+i];
      b=row[j+32+i];
      row[j+i]   = (t&0x00000000ffffffffULL)      | ((b                      )<<32);
      row[j+32+i]=((t                      )>>32) |  (b&0xffffffff00000000ULL) ;
    }
  }
  for(j=0;j<64;j+=32){
    unsigned long long int t,b;
    for(i=0;i<16;i++){
      t=row[j+i];
      b=row[j+16+i];
      row[j+i]   = (t&0x0000ffff0000ffffULL)      | ((b&0x0000ffff0000ffffULL)<<16);
      row[j+16+i]=((t&0xffff0000ffff0000ULL)>>16) |  (b&0xffff0000ffff0000ULL) ;
    }
  }
  for(j=0;j<64;j+=16){
    unsigned long long int t,b;
    for(i=0;i<8;i++){
      t=row[j+i];
      b=row[j+8+i];
      row[j+i]   = (t&0x00ff00ff00ff00ffULL)     | ((b&0x00ff00ff00ff00ffULL)<<8);
      row[j+8+i] =((t&0xff00ff00ff00ff00ULL)>>8) |  (b&0xff00ff00ff00ff00ULL);
    }
  }
  for(j=0;j<64;j+=8){
    unsigned long long int t,b;
    for(i=0;i<4;i++){
      t=row[j+i];
      b=row[j+4+i];
      row[j+i]   =((t&0x0f0f0f0f0f0f0f0fULL)<<4) |  (b&0x0f0f0f0f0f0f0f0fULL);
      row[j+4+i] = (t&0xf0f0f0f0f0f0f0f0ULL)     | ((b&0xf0f0f0f0f0f0f0f0ULL)>>4);
    }
  }
  for(j=0;j<64;j+=4){
    unsigned long long int t,b;
    for(i=0;i<2;i++){
      t=row[j+i];
      b=row[j+2+i];
      row[j+i]   =((t&0x3333333333333333ULL)<<2) |  (b&0x3333333333333333ULL);
      row[j+2+i] = (t&0xccccccccccccccccULL)     | ((b&0xccccccccccccccccULL)>>2);
    }
  }
  for(j=0;j<64;j+=2){
    unsigned long long int t,b;
    for(i=0;i<1;i++){
      t=row[j+i];
      b=row[j+1+i];
      row[j+i]   =((t&0x5555555555555555ULL)<<1) |  (b&0x5555555555555555ULL);
      row[j+1+i] = (t&0xaaaaaaaaaaaaaaaaULL)     | ((b&0xaaaaaaaaaaaaaaaaULL)>>1);
    }
  }
#undef row
}

static inline void trasp64_64_88cw(unsigned char *data){
/* 64 rows of 64 bits transposition (bytes transp. - 8x8 rotate clockwise)*/
#define row ((unsigned long long int *)data)
  int i,j;
  for(j=0;j<64;j+=64){
    unsigned long long int t,b;
    for(i=0;i<32;i++){
      t=row[j+i];
      b=row[j+32+i];
      row[j+i]   = (t&0x00000000ffffffffULL)      | ((b                      )<<32);
      row[j+32+i]=((t                      )>>32) |  (b&0xffffffff00000000ULL) ;
    }
  }
  for(j=0;j<64;j+=32){
    unsigned long long int t,b;
    for(i=0;i<16;i++){
      t=row[j+i];
      b=row[j+16+i];
      row[j+i]   = (t&0x0000ffff0000ffffULL)      | ((b&0x0000ffff0000ffffULL)<<16);
      row[j+16+i]=((t&0xffff0000ffff0000ULL)>>16) |  (b&0xffff0000ffff0000ULL) ;
    }
  }
  for(j=0;j<64;j+=16){
    unsigned long long int t,b;
    for(i=0;i<8;i++){
      t=row[j+i];
      b=row[j+8+i];
      row[j+i]   = (t&0x00ff00ff00ff00ffULL)     | ((b&0x00ff00ff00ff00ffULL)<<8);
      row[j+8+i] =((t&0xff00ff00ff00ff00ULL)>>8) |  (b&0xff00ff00ff00ff00ULL);
    }
  }
  for(j=0;j<64;j+=8){
    unsigned long long int t,b;
    for(i=0;i<4;i++){
      t=row[j+i];
      b=row[j+4+i];
      row[j+i]   =((t&0xf0f0f0f0f0f0f0f0ULL)>>4) |   (b&0xf0f0f0f0f0f0f0f0ULL);
      row[j+4+i] = (t&0x0f0f0f0f0f0f0f0fULL)     |  ((b&0x0f0f0f0f0f0f0f0fULL)<<4);
    }
  }
  for(j=0;j<64;j+=4){
    unsigned long long int t,b;
    for(i=0;i<2;i++){
      t=row[j+i];
      b=row[j+2+i];
      row[j+i]   =((t&0xccccccccccccccccULL)>>2) |  (b&0xccccccccccccccccULL);
      row[j+2+i] = (t&0x3333333333333333ULL)     | ((b&0x3333333333333333ULL)<<2);
    }
  }
  for(j=0;j<64;j+=2){
    unsigned long long int t,b;
    for(i=0;i<1;i++){
      t=row[j+i];
      b=row[j+1+i];
      row[j+i]   =((t&0xaaaaaaaaaaaaaaaaULL)>>1) |  (b&0xaaaaaaaaaaaaaaaaULL);
      row[j+1+i] = (t&0x5555555555555555ULL)     | ((b&0x5555555555555555ULL)<<1);
    }
  }
#undef row
}

//64-128----------------------------------------------------------
static inline void trasp64_128_88ccw(unsigned char *data){
/* 64 rows of 128 bits transposition (bytes transp. - 8x8 rotate counterclockwise)*/
#define halfrow ((unsigned long long int *)data)
  int i,j;
  for(j=0;j<64;j+=64){
    unsigned long long int t,b;
    for(i=0;i<32;i++){
      t=halfrow[2*(j+i)];
      b=halfrow[2*(j+32+i)];
      halfrow[2*(j+i)]   = (t&0x00000000ffffffffULL)      | ((b                      )<<32);
      halfrow[2*(j+32+i)]=((t                      )>>32) |  (b&0xffffffff00000000ULL) ;
      t=halfrow[2*(j+i)+1];
      b=halfrow[2*(j+32+i)+1];
      halfrow[2*(j+i)+1]   = (t&0x00000000ffffffffULL)      | ((b                      )<<32);
      halfrow[2*(j+32+i)+1]=((t                      )>>32) |  (b&0xffffffff00000000ULL) ;
    }
  }
  for(j=0;j<64;j+=32){
    unsigned long long int t,b;
    for(i=0;i<16;i++){
      t=halfrow[2*(j+i)];
      b=halfrow[2*(j+16+i)];
      halfrow[2*(j+i)]   = (t&0x0000ffff0000ffffULL)      | ((b&0x0000ffff0000ffffULL)<<16);
      halfrow[2*(j+16+i)]=((t&0xffff0000ffff0000ULL)>>16) |  (b&0xffff0000ffff0000ULL) ;
      t=halfrow[2*(j+i)+1];
      b=halfrow[2*(j+16+i)+1];
      halfrow[2*(j+i)+1]   = (t&0x0000ffff0000ffffULL)      | ((b&0x0000ffff0000ffffULL)<<16);
      halfrow[2*(j+16+i)+1]=((t&0xffff0000ffff0000ULL)>>16) |  (b&0xffff0000ffff0000ULL) ;
    }
  }
  for(j=0;j<64;j+=16){
    unsigned long long int t,b;
    for(i=0;i<8;i++){
      t=halfrow[2*(j+i)];
      b=halfrow[2*(j+8+i)];
      halfrow[2*(j+i)]   = (t&0x00ff00ff00ff00ffULL)     | ((b&0x00ff00ff00ff00ffULL)<<8);
      halfrow[2*(j+8+i)] =((t&0xff00ff00ff00ff00ULL)>>8) |  (b&0xff00ff00ff00ff00ULL);
      t=halfrow[2*(j+i)+1];