/* * This file was originally licensed * under Apache 2.0 (https://www.apache.org/licenses/LICENSE-2.0.html) * at https://github.com/GMUCERG/PQC_NEON/blob/main/neon/kyber or * public domain at https://github.com/cothan/kyber/blob/master/neon * * We offer * CC0 1.0 Universal or the following MIT License for this file. * You may freely choose one of them that applies. * * MIT License * * Copyright (c) 2023: Hanno Becker, Vincent Hwang, Matthias J. Kannwischer, Bo-Yin Yang, and Shang-Yi Yang * * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include "params.h" #include "poly.h" #include "ntt.h" #include "cbd.h" #include "symmetric.h" /************************************************* * Name: neon_poly_getnoise_eta1_2x * * Description: Sample a polynomial deterministically from a seed and a nonce, * with output polynomial close to centered binomial distribution * with parameter KYBER_ETA1 * * Arguments: - poly *r: pointer to output polynomial * - const uint8_t *seed: pointer to input seed * (of length KYBER_SYMBYTES bytes) * - uint8_t nonce: one-byte input nonce **************************************************/ void neon_poly_getnoise_eta1_2x(int16_t vec1[KYBER_N], int16_t vec2[KYBER_N], const uint8_t seed[KYBER_SYMBYTES], uint8_t nonce1, uint8_t nonce2) { uint8_t buf1[KYBER_ETA1 * KYBER_N / 4], buf2[KYBER_ETA1 * KYBER_N / 4]; neon_prf(buf1, buf2, sizeof(buf1), seed, nonce1, nonce2); poly_cbd_eta1(vec1, buf1); poly_cbd_eta1(vec2, buf2); } /************************************************* * Name: neon_poly_getnoise_eta2_2x * neon_poly_getnoise_eta2 * * Description: Sample a polynomial deterministically from a seed and a nonce, * with output polynomial close to centered binomial distribution * with parameter KYBER_ETA2 * * Arguments: - poly *r: pointer to output polynomial * - const uint8_t *seed: pointer to input seed * (of length KYBER_SYMBYTES bytes) * - uint8_t nonce: one-byte input nonce **************************************************/ void neon_poly_getnoise_eta2_2x(int16_t vec1[KYBER_N], int16_t vec2[KYBER_N], const uint8_t seed[KYBER_SYMBYTES], uint8_t nonce1, uint8_t nonce2) { uint8_t buf1[KYBER_ETA2 * KYBER_N / 4], buf2[KYBER_ETA2 * KYBER_N / 4]; neon_prf(buf1, buf2, sizeof(buf1), seed, nonce1, nonce2); poly_cbd_eta2(vec1, buf1); poly_cbd_eta2(vec2, buf2); } void neon_poly_getnoise_eta2(int16_t r[KYBER_N], const uint8_t seed[KYBER_SYMBYTES], uint8_t nonce) { uint8_t buf[KYBER_ETA2 * KYBER_N / 4]; prf(buf, sizeof(buf), seed, nonce); poly_cbd_eta2(r, buf); } /************************************************* * Name: neon_ntt * * Description: Computes negacyclic number-theoretic transform (NTT) of * a polynomial in place; * inputs assumed to be in normal order, output in bitreversed order * * Arguments: - uint16_t *r: pointer to in/output polynomial **************************************************/ void neon_poly_ntt(int16_t r[KYBER_N]) { ntt(r); } /************************************************* * Name: neon_invntt * * Description: Computes inverse of negacyclic number-theoretic transform (NTT) * of a polynomial in place; * inputs assumed to be in bitreversed order, output in normal order * * Arguments: - uint16_t *a: pointer to in/output polynomial **************************************************/ void neon_poly_invntt_tomont(int16_t r[KYBER_N]) { invntt(r); } /************************************************* * Name: neon_poly_add_reduce * * Description: Add two polynomials; no modular reduction is performed * Applies Barrett reduction to all coefficients of a polynomial * for details of the Barrett reduction see comments in reduce.c * * Arguments: - poly *r: pointer to output polynomial * - const poly *a: pointer to first input polynomial * - const poly *b: pointer to second input polynomial **************************************************/ extern void PQCLEAN_MLKEM768_AARCH64__asm_add_reduce(int16_t *, const int16_t *); void neon_poly_add_reduce(int16_t c[KYBER_N], const int16_t a[KYBER_N]) { PQCLEAN_MLKEM768_AARCH64__asm_add_reduce(c, a); } extern void PQCLEAN_MLKEM768_AARCH64__asm_add_add_reduce(int16_t *, const int16_t *, const int16_t *); void neon_poly_add_add_reduce(int16_t c[KYBER_N], const int16_t a[KYBER_N], const int16_t b[KYBER_N]) { PQCLEAN_MLKEM768_AARCH64__asm_add_add_reduce(c, a, b); } /************************************************* * Name: neon_poly_sub_reduce * * Description: Subtract two polynomials; no modular reduction is performed * Applies Barrett reduction to all coefficients of a polynomial * for details of the Barrett reduction see comments in reduce.c * * Arguments: - poly *r: pointer to output polynomial * - const poly *a: pointer to first input polynomial * - const poly *b: pointer to second input polynomial **************************************************/ extern void PQCLEAN_MLKEM768_AARCH64__asm_sub_reduce(int16_t *, const int16_t *); void neon_poly_sub_reduce(int16_t c[KYBER_N], const int16_t a[KYBER_N]) { PQCLEAN_MLKEM768_AARCH64__asm_sub_reduce(c, a); }