2 * Shamir's secret sharing public functions
4 * Copyright (C) 2013 Matt Corallo <git@bluematt.me>
6 * This file is part of ASSS (Audit-friendly Shamir's Secret Sharing)
8 * ASSS is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU Affero General Public License as
10 * published by the Free Software Foundation, either version 3 of
11 * the License, or (at your option) any later version.
13 * ASSS is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU Affero General Public License for more details.
18 * You should have received a copy of the GNU Affero General Public
19 * License along with ASSS. If not, see
20 * <http://www.gnu.org/licenses/>.
26 #include <linux/types.h>
32 * Calculates the Y coordinate that the point with the given X
33 * coefficients[0] == secret, the rest are secure random values
35 uint8_t calculateQ(uint8_t coefficients[], uint8_t shares_required, uint8_t x);
38 * Derives the secret given a set of shares_required points (x and q coordinates)
40 uint8_t calculateSecret(uint8_t x[], uint8_t q[], uint8_t shares_required);