Revision 95d1236b libavutil/aes.c

View differences:

libavutil/aes.c
52 52 
#define SUBSHIFT2(s, box) t=s[0]; s[0]=box[s[ 8]]; s[ 8]=box[    t]; t=s[ 4]; s[ 4]=box[s[12]]; s[12]=box[t];
53 53 
#define SUBSHIFT3(s, box) t=s[0]; s[0]=box[s[12]]; s[12]=box[s[ 8]];          s[ 8]=box[s[ 4]]; s[ 4]=box[t];
54 54 

  		




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#define ROT(x,s) ((x>>s)|(x<<(32-s))


  		




  
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#define ROT(x,s) ((x<<s)|(x>>(32-s)))


  		




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static inline void mix(uint8_t state[4][4], uint32_t multbl[4][256]){


  		




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    int i;


  		




  ......




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    addkey(a->state, a->round_key[r]);


  		




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}


  		




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static init_multbl(uint8_t tbl[256], int c[4], uint8_t *log8, uint8_t *alog8){


  		




  
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static init_multbl(uint8_t tbl[1024], int c[4], uint8_t *log8, uint8_t *alog8){


  		




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    int i;


  		




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    for(i=4; i<1024; i++)


  		




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        tbl[i]= alog8[ log8[i/4] + log8[c[i&3]] ];


  		




  ......




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//            av_log(NULL, AV_LOG_ERROR, "%d, ", log8[i]);


  		




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        }


  		




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        init_multbl(dec_multbl[0], (int[4]){0xe, 0x9, 0xd, 0xb}, log8, alog8);


  		




  
  135
  
    
#ifndef CONFIG_SMALL


  		




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        init_multbl(dec_multbl[1], (int[4]){0xb, 0xe, 0x9, 0xd}, log8, alog8);


  		




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        init_multbl(dec_multbl[2], (int[4]){0xd, 0xb, 0xe, 0x9}, log8, alog8);


  		




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        init_multbl(dec_multbl[3], (int[4]){0x9, 0xd, 0xb, 0xe}, log8, alog8);


  		




  
  139
  
    
#endif


  		




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        init_multbl(enc_multbl[0], (int[4]){0x2, 0x1, 0x1, 0x3}, log8, alog8);


  		




  
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#ifndef CONFIG_SMALL


  		




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        init_multbl(enc_multbl[1], (int[4]){0x3, 0x2, 0x1, 0x1}, log8, alog8);


  		




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        init_multbl(enc_multbl[2], (int[4]){0x1, 0x3, 0x2, 0x1}, log8, alog8);


  		




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        init_multbl(enc_multbl[3], (int[4]){0x1, 0x1, 0x3, 0x2}, log8, alog8);


  		




  
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#endif


  		




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    }


  		




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    if(key_bits!=128 && key_bits!=192 && key_bits!=256)


  		












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