Exemple #1
0
HashReturn_gr update_and_final_groestl( hashState_groestl* ctx, void* output,
                                const void* input, DataLength_gr databitlen )
{
   const int len = (int)databitlen / 128;
   const int hashlen_m128i = ctx->hashlen / 16;   // bytes to __m128i
   const int hash_offset = SIZE512 - hashlen_m128i;
   int rem = ctx->rem_ptr;
   int blocks = len / SIZE512;
   __m128i* in = (__m128i*)input;
   int i;

   // --- update ---

   // digest any full blocks, process directly from input 
   for ( i = 0; i < blocks; i++ )
      TF1024( ctx->chaining, &in[ i * SIZE512 ] );
   ctx->buf_ptr = blocks * SIZE512;

   // copy any remaining data to buffer, it may already contain data
   // from a previous update for a midstate precalc
   for ( i = 0; i < len % SIZE512; i++ )
       ctx->buffer[ rem + i ] = in[ ctx->buf_ptr + i ];
   i += rem;    // use i as rem_ptr in final

   //--- final ---

   blocks++;      // adjust for final block

   if ( i == len -1 )
   {        
       // only 128 bits left in buffer, all padding at once
       ctx->buffer[i] = _mm_set_epi8( blocks,0,0,0, 0,0,0,0,
                                           0,0,0,0, 0,0,0,0x80 );
   }   
   else
   {
       // add first padding
       ctx->buffer[i] = _mm_set_epi8( 0,0,0,0, 0,0,0,0, 
                                      0,0,0,0, 0,0,0,0x80 );
       // add zero padding
       for ( i += 1; i < SIZE512 - 1; i++ )
           ctx->buffer[i] = _mm_setzero_si128();

       // add length padding, second last byte is zero unless blocks > 255
       ctx->buffer[i] = _mm_set_epi8( blocks, blocks>>8, 0,0, 0,0,0,0, 
                                           0,         0 ,0,0, 0,0,0,0 );
   }

   // digest final padding block and do output transform
   TF1024( ctx->chaining, ctx->buffer );
   OF1024( ctx->chaining );

   // store hash result in output 
   for ( i = 0; i < hashlen_m128i; i++ )
      casti_m128i( output, i ) = ctx->chaining[ hash_offset + i ];

   return SUCCESS_GR;
}
Exemple #2
0
// use only for midstate precalc
HashReturn_gr update_groestl( hashState_groestl* ctx, const void* input,
                              DataLength_gr databitlen )
{
   __m128i* in = (__m128i*)input;
   const int len = (int)databitlen / 128;  // bits to __m128i
   const int blocks = len / SIZE512;    // __M128i to blocks
   int rem = ctx->rem_ptr;
   int i;

   ctx->blk_count  = blocks;
   ctx->databitlen = databitlen;

   // digest any full blocks 
   for ( i = 0; i < blocks; i++ )
       TF1024( ctx->chaining, &in[ i * SIZE512 ] );
   // adjust buf_ptr to last block
   ctx->buf_ptr = blocks * SIZE512;

   // copy any remaining data to buffer for final hash, it may already
   // contain data from a previous update for a midstate precalc
   for ( i = 0; i < len % SIZE512; i++ )
       ctx->buffer[ rem + i ] = in[ ctx->buf_ptr + i ];
   // adjust rem_ptr for possible  new data
   ctx->rem_ptr += i;

   return SUCCESS_GR;
}
Exemple #3
0
/* digest up to len bytes of input (full blocks only) */
void Transform(hashState *ctx,
	       const u8 *in, 
	       unsigned long long len) {

    /* increment block counter */
    ctx->block_counter += len/SIZE;

    /* digest message, one block at a time */
    for (; len >= SIZE; len -= SIZE, in += SIZE)
#if LENGTH<=256
      TF512((u64*)ctx->chaining, (u64*)in);
#else
      TF1024((u64*)ctx->chaining, (u64*)in);
#endif

    asm volatile ("emms");
}
Exemple #4
0
// deprecated do not use
HashReturn_gr final_groestl( hashState_groestl* ctx, void* output )
{
   const int len = (int)ctx->databitlen / 128;  // bits to __m128i 
   const int blocks = ctx->blk_count + 1;       // adjust for final block

   const int rem_ptr = ctx->rem_ptr;      // end of data start of padding
   const int hashlen_m128i = ctx->hashlen / 16;  // bytes to __m128i
   const int hash_offset = SIZE512 - hashlen_m128i;  // where in buffer
   int i;

   // first pad byte = 0x80, last pad byte = block count
   // everything in between is zero

   if ( rem_ptr == len - 1 )
   {
       // only 128 bits left in buffer, all padding at once
       ctx->buffer[rem_ptr] = _mm_set_epi8( blocks,0,0,0, 0,0,0,0,
                                                  0,0,0,0, 0,0,0,0x80 );
   }
   else
   {
       // add first padding
       ctx->buffer[rem_ptr] = _mm_set_epi8( 0,0,0,0, 0,0,0,0,
                                            0,0,0,0, 0,0,0,0x80 );
       // add zero padding
       for ( i = rem_ptr + 1; i < SIZE512 - 1; i++ )
           ctx->buffer[i] = _mm_setzero_si128();

       // add length padding, second last byte is zero unless blocks > 255
       ctx->buffer[i] = _mm_set_epi8( blocks, blocks>>8, 0,0, 0,0,0,0,
                                           0,         0 ,0,0, 0,0,0,0 );
   }

   // digest final padding block and do output transform
   TF1024( ctx->chaining, ctx->buffer );
   OF1024( ctx->chaining );

   // store hash result in output 
   for ( i = 0; i < hashlen_m128i; i++ )
      casti_m128i( output, i ) = ctx->chaining[ hash_offset + i];

   return SUCCESS_GR;
}