Exemple #1
0
int keyGen(int pub)
{
    int test=private-(pub*3);
    p=nth_prime(test/4,test/5);
    q=nth_prime(test/5,test/3);
    e=expGen(p,q);
    d=egcd(e,(p-1)*(q-1));
    n=p*q;
    printf("Public key %d , test %d, P: %d, Q: %d, E: %d, D: %d, n: %d \n",pub,test,p,q,e,d,n);
}
Exemple #2
0
///////////////////////////////////////////////////////////////////
// This function takes as input an array of key values, where each
// key value is in ASCII string format (the way it is stored in
// catalogs). It encodes the key values and returns the encoded
// value in the encodedKeyBuffer. 
// RETURNS: -1, if error. 0, if all Ok.
///////////////////////////////////////////////////////////////////
short encodeKeyValues(desc_struct   * column_descs,
		      desc_struct   * key_descs,
		      NAString      * inValuesArray[],          // INPUT
                      NABoolean isIndex,
		      char * encodedKeyBuffer,                  // OUTPUT
                      CollHeap * h,
		      ComDiagsArea * diagsArea)
{
  short error = 0;       // assume all will go well
  NABoolean deleteLater = FALSE;

  // set up binder/generator stuff so expressions could be generated.
  InitSchemaDB();
  CmpStatement cmpStatement(CmpCommon::context());
  ActiveSchemaDB()->createStmtTables();
  BindWA       bindWA(ActiveSchemaDB(), CmpCommon::context());
  Generator    generator(CmpCommon::context());
  ExpGenerator expGen(&generator);
  generator.appendAtEnd(); // alloc a new map table
  generator.setBindWA(&bindWA);
  generator.setExpGenerator(&expGen);
  FragmentDir * compFragDir = generator.getFragmentDir();

  // create the fragment (independent code space) for this expression
  CollIndex myFragmentId = compFragDir->pushFragment(FragmentDir::MASTER);
  
  // space where RCB will be generated
  Space * space = generator.getSpace();

  // Let's start with a list of size 4 rather than resizing continuously
  ValueIdList encodedValueIdList(4);
  desc_struct * column = column_descs;
  desc_struct * key    = key_descs;
  Int32 i = 0;

  if (inValuesArray == NULL)
    deleteLater = TRUE;

  while (key)
    {
      // for an index, keys_desc has columns in the same order as columns_desc,
      // the following for loop is not needed.
      if (!isIndex) {
      column = column_descs;
      for (Int32 j = 0; j < key->body.keys_desc.tablecolnumber; j++)
	column = column->header.next;
      }

      if (inValuesArray[i] == NULL)
	inValuesArray[i] = getMinMaxValue(column, key, FALSE, h);
      
      ItemExpr * itemExpr = buildEncodeTree(column, key, inValuesArray[i],
					    &generator, diagsArea);
      if (! itemExpr)
	return -1;

      encodedValueIdList.insert(itemExpr->getValueId());
      
      i++;
      key = key->header.next;
      if (isIndex)
        column = column->header.next;
    }
  
  // allocate a work cri desc to encode keys. It has
  // 3 entries: 0, for consts. 1, for temps. 
  // 2, for the encoded key.
  ex_cri_desc * workCriDesc = new(space) ex_cri_desc(3, space);
  short keyAtpIndex   = 2;  // where the encoded key will be built
  
  ULng32 encodedKeyLen;
  ex_expr * keExpr = 0;
  expGen.generateContiguousMoveExpr(encodedValueIdList,
				    0 /*don't add conv nodes*/,
				    0 /*atp*/, keyAtpIndex,
				    ExpTupleDesc::SQLMX_KEY_FORMAT,
				    encodedKeyLen,
				    &keExpr);

  // create a DP2 expression and initialize it with the key encode expr.
  ExpDP2Expr * keyEncodeExpr = new(space) ExpDP2Expr(keExpr,
						     workCriDesc,
						     space);
  
  keyEncodeExpr->getExpr()->fixup(0,expGen.getPCodeMode(), 
                                  (ex_tcb *)space,space, h, FALSE, NULL);

  atp_struct * workAtp = keyEncodeExpr->getWorkAtp();
  workAtp->getTupp(keyAtpIndex).setDataPointer(encodedKeyBuffer);
  
  if (keyEncodeExpr->getExpr()->eval(workAtp, 0, space) == ex_expr::EXPR_ERROR)
    error = -1;

  if (deleteLater)
    delete [] inValuesArray;

  generator.removeAll(NULL);

  return error;
}