1 /* gmp-glue.h 2 3 Copyright (C) 2013 Niels Möller 4 Copyright (C) 2013 Red Hat 5 6 This file is part of GNU Nettle. 7 8 GNU Nettle is free software: you can redistribute it and/or 9 modify it under the terms of either: 10 11 * the GNU Lesser General Public License as published by the Free 12 Software Foundation; either version 3 of the License, or (at your 13 option) any later version. 14 15 or 16 17 * the GNU General Public License as published by the Free 18 Software Foundation; either version 2 of the License, or (at your 19 option) any later version. 20 21 or both in parallel, as here. 22 23 GNU Nettle is distributed in the hope that it will be useful, 24 but WITHOUT ANY WARRANTY; without even the implied warranty of 25 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 26 General Public License for more details. 27 28 You should have received copies of the GNU General Public License and 29 the GNU Lesser General Public License along with this program. If 30 not, see http://www.gnu.org/licenses/. 31 */ 32 33 #ifndef GNUTLS_LIB_NETTLE_ECC_NETTLE_GMP_GLUE_H_INCLUDED 34 #define GNUTLS_LIB_NETTLE_ECC_NETTLE_GMP_GLUE_H_INCLUDED 35 36 #include <nettle/bignum.h> 37 38 #define cnd_swap _gnutls_nettle_ecc_cnd_swap 39 #define mpz_limbs_cmp _gnutls_nettle_ecc_mpz_limbs_cmp 40 #define mpz_limbs_read_n _gnutls_nettle_ecc_mpz_limbs_read_n 41 #define mpz_limbs_copy _gnutls_nettle_ecc_mpz_limbs_copy 42 #define mpz_set_n _gnutls_nettle_ecc_mpz_set_n 43 #define mpn_set_base256 _gnutls_nettle_ecc_mpn_set_base256 44 #define mpn_set_base256_le _gnutls_nettle_ecc_mpn_set_base256_le 45 #define mpn_get_base256 _gnutls_nettle_ecc_mpn_get_base256 46 #define mpn_get_base256_le _gnutls_nettle_ecc_mpn_get_base256_le 47 #define gmp_alloc_limbs _gnutls_nettle_ecc_gmp_alloc_limbs 48 #define gmp_free_limbs _gnutls_nettle_ecc_gmp_free_limbs 49 #define gmp_free _gnutls_nettle_ecc_gmp_free 50 #define gmp_alloc _gnutls_nettle_ecc_gmp_alloc 51 52 #define TMP_GMP_DECL(name, type) type *name; \ 53 size_t tmp_##name##_size 54 #define TMP_GMP_ALLOC(name, size) do { \ 55 tmp_##name##_size = (size); \ 56 (name) = gmp_alloc(sizeof (*name) * (size)); \ 57 } while (0) 58 #define TMP_GMP_FREE(name) (gmp_free(name, tmp_##name##_size)) 59 60 61 /* Use only in-place operations, so we can fall back to addmul_1/submul_1 */ 62 #ifdef mpn_cnd_add_n 63 # define cnd_add_n(cnd, rp, ap, n) mpn_cnd_add_n ((cnd), (rp), (rp), (ap), (n)) 64 # define cnd_sub_n(cnd, rp, ap, n) mpn_cnd_sub_n ((cnd), (rp), (rp), (ap), (n)) 65 #else 66 # define cnd_add_n(cnd, rp, ap, n) mpn_addmul_1 ((rp), (ap), (n), (cnd) != 0) 67 # define cnd_sub_n(cnd, rp, ap, n) mpn_submul_1 ((rp), (ap), (n), (cnd) != 0) 68 #endif 69 70 #define NETTLE_OCTET_SIZE_TO_LIMB_SIZE(n) \ 71 (((n) * 8 + GMP_NUMB_BITS - 1) / GMP_NUMB_BITS) 72 73 void 74 cnd_swap (mp_limb_t cnd, mp_limb_t *ap, mp_limb_t *bp, mp_size_t n); 75 76 /* Convenience functions */ 77 int 78 mpz_limbs_cmp (mpz_srcptr a, const mp_limb_t *bp, mp_size_t bn); 79 80 /* Get a pointer to an n limb area, for read-only operation. n must be 81 greater or equal to the current size, and the mpz is zero-padded if 82 needed. */ 83 const mp_limb_t * 84 mpz_limbs_read_n (mpz_ptr x, mp_size_t n); 85 86 /* Copy limbs, with zero-padding. */ 87 /* FIXME: Reorder arguments, on the theory that the first argument of 88 an _mpz_* function should be an mpz_t? Or rename to _mpz_get_limbs, 89 with argument order consistent with mpz_get_*. */ 90 void 91 mpz_limbs_copy (mp_limb_t *xp, mpz_srcptr x, mp_size_t n); 92 93 void 94 mpz_set_n (mpz_t r, const mp_limb_t *xp, mp_size_t xn); 95 96 /* Like mpn_set_str, but always writes rn limbs. If input is larger, 97 higher bits are ignored. */ 98 void 99 mpn_set_base256 (mp_limb_t *rp, mp_size_t rn, 100 const uint8_t *xp, size_t xn); 101 102 void 103 mpn_set_base256_le (mp_limb_t *rp, mp_size_t rn, 104 const uint8_t *xp, size_t xn); 105 106 void 107 mpn_get_base256 (uint8_t *rp, size_t rn, 108 const mp_limb_t *xp, mp_size_t xn); 109 110 void 111 mpn_get_base256_le (uint8_t *rp, size_t rn, 112 const mp_limb_t *xp, mp_size_t xn); 113 114 115 mp_limb_t * 116 gmp_alloc_limbs (mp_size_t n); 117 118 void 119 gmp_free_limbs (mp_limb_t *p, mp_size_t n); 120 121 void *gmp_alloc(size_t n); 122 void gmp_free(void *p, size_t n); 123 124 #endif /* GNUTLS_LIB_NETTLE_ECC_NETTLE_GMP_GLUE_H_INCLUDED */ 125