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-
- void refresh_blinds(int8_t flags[], DB_t standard_basis_vector[], DB_t finalCW, bool party, size_t db_nitems, size_t rotate_by = 0)
- {
-
- DB_t tmp = 0;
- for(size_t j = 0; j < db_nitems; ++j)
- {
- if(flags[(j + rotate_by) % db_nitems] != 0)
- {
- tmp = finalCW;
- }
- else
- {
- tmp = 0;
- }
- if(party) updated_blinds[j] = blinds[j] - standard_basis_vector[(j + rotate_by) % db_nitems] - tmp;
- if(!party) updated_blinds[j] = blinds[j] - standard_basis_vector[(j + rotate_by) % db_nitems] + tmp;
-
- }
-
- }
- void get_refresh_correction_words (tcp::socket& sb, DB_t one_shareA, DB_t one_shareB,
- DB_t one_shareC, DB_t& CW0, DB_t& CW1, DB_t& CW2, DB_t value)
- {
-
- DB_t tmp0 = value + one_shareA;
-
- write(sb, boost::asio::buffer(&tmp0, sizeof(tmp0)));
- read(sb, boost::asio::buffer(&CW0, sizeof(CW0)));
- CW0 = CW0 + tmp0;
- DB_t tmp1 = value + one_shareB;
- write(sb, boost::asio::buffer(&tmp1, sizeof(tmp1)));
- read(sb, boost::asio::buffer(&CW1, sizeof(CW1)));
- CW1 = CW1 + tmp1;
- DB_t tmp2 = value + one_shareC;
-
- write(sb, boost::asio::buffer(&tmp2, sizeof(tmp2)));
- read(sb, boost::asio::buffer(&CW2, sizeof(CW2)));
-
- CW2 = CW2 + tmp2;
- }
- void refresh_blinded_vector(int8_t flags0[], int8_t flags2[], DB_t b[], DB_t d[],
- DB_t finalCW0, DB_t finalCW2, bool party, size_t db_nitems, size_t rotate_by = 0)
- {
-
-
- DB_t tmp0 = 0;
- DB_t tmp2 = 0;
-
- for(size_t j = 0; j < db_nitems; ++j)
- {
-
- if(flags0[(j + rotate_by) % db_nitems] != 0)
- {
- tmp0 = finalCW0;
- }
- else
- {
- tmp0 = 0;
- }
- if(flags2[(j + rotate_by) % db_nitems] != 0)
- {
- tmp2 = finalCW2;
- }
- else
- {
- tmp2 = 0;
- }
- if(party)
- {
- updated_blinded_DB_recv[j] = blinded_DB_recv[j] - b[(j + rotate_by) % db_nitems] + d[(j + rotate_by) % db_nitems] - tmp0 + tmp2;
- }
- if(!party)
- {
- updated_blinded_DB_recv[j] = blinded_DB_recv[j] - b[(j + rotate_by) % db_nitems] + d[(j + rotate_by) % db_nitems] + tmp0 - tmp2;
- }
- }
- }
- void refresh_blinded_vector_and_blinds(int8_t flags[], DB_t standard_basis_vector[], DB_t finalCW,int8_t flags0[], int8_t flags2[], DB_t b[], DB_t d[],
- bool party, size_t db_nitems, size_t rotate_by)
- {
-
-
-
- for(size_t j = 0; j < db_nitems; ++j)
- {
-
- updated_blinded_DB_recv[j] = blinded_DB_recv[j] - b[(j + rotate_by) % db_nitems] + d[(j + rotate_by) % db_nitems]
- - (flags0[(j + rotate_by) % db_nitems] * finalCW) + (flags2[(j + rotate_by) % db_nitems] * finalCW);
-
- blinds[j] = blinds[j] - standard_basis_vector[(j + rotate_by) % db_nitems] - (flags[(j + rotate_by) % db_nitems] * finalCW);// ((flags[(j + rotate_by) % db_nitems]!=0) ? finalCW : 0 );
- // if(party)
- // {
- // updated_blinded_DB_recv[j] = blinded_DB_recv[j] - b[(j + rotate_by) % db_nitems] + d[(j + rotate_by) % db_nitems] - ((flags0[(j + rotate_by) % db_nitems]!=0) ? finalCW : 0 ) + ((flags2[(j + rotate_by) % db_nitems]!=0) ? finalCW : 0 );
- // blinds[j] = blinds[j] - standard_basis_vector[(j + rotate_by) % db_nitems] - ((flags[(j + rotate_by) % db_nitems]!=0) ? finalCW : 0 );
- // }
- // if(!party)
- // {
- // updated_blinded_DB_recv[j] = blinded_DB_recv[j] - b[(j + rotate_by) % db_nitems] + d[(j + rotate_by) % db_nitems] + ((flags0[(j + rotate_by) % db_nitems]!=0) ? finalCW : 0 ) - ((flags2[(j + rotate_by) % db_nitems]!=0) ? finalCW : 0 );
- // blinds[j] = blinds[j] - standard_basis_vector[(j + rotate_by) % db_nitems] + ((flags[(j + rotate_by) % db_nitems]!=0) ? finalCW : 0 );
- // }
- }
- }
- void duoram_refresh (int8_t flags0[], int8_t flags1[], int8_t flags2[], DB_t b[], DB_t c[], DB_t d[], DB_t CW, bool party, size_t db_nitems, size_t rotate_by_ = 0)
- {
- refresh_blinded_vector_and_blinds(flags1, c, CW, flags0, flags2, b, d, party, db_nitems, rotate_by_);
- }
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