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* bignum operations that are missing from gmp.
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/* nettle, low-level cryptographics library
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* Copyright (C) 2001 Niels M�ller
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* The nettle library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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* The nettle library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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* You should have received a copy of the GNU Lesser General Public License
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* along with the nettle library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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#ifndef NETTLE_BIGNUM_H_INCLUDED
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#define NETTLE_BIGNUM_H_INCLUDED
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#include "nettle-meta.h"
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#include "nettle-types.h"
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/* Size needed for signed encoding, including extra sign byte if
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nettle_mpz_sizeinbase_256_s(const mpz_t x);
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/* Size needed for unsigned encoding */
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nettle_mpz_sizeinbase_256_u(const mpz_t x);
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/* Writes an integer as length octets, using big endian byte order,
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* and two's complement for negative numbers. */
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/* FIXME: Change order of arguments, putting the mpz_t first? */
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nettle_mpz_get_str_256(unsigned length, uint8_t *s, const mpz_t x);
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/* Reads a big endian, two's complement, integer. */
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nettle_mpz_set_str_256_s(mpz_t x,
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unsigned length, const uint8_t *s);
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nettle_mpz_init_set_str_256_s(mpz_t x,
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unsigned length, const uint8_t *s);
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/* Similar, but for unsigned format. These function don't interpret
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* the most significant bit as the sign. */
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nettle_mpz_set_str_256_u(mpz_t x,
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unsigned length, const uint8_t *s);
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nettle_mpz_init_set_str_256_u(mpz_t x,
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unsigned length, const uint8_t *s);
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/* Returns a uniformly distributed random number 0 <= x < 2^n */
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nettle_mpz_random_size(mpz_t x,
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void *ctx, nettle_random_func random,
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/* Returns a number x, almost uniformly random in the range
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nettle_mpz_random(mpz_t x,
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void *ctx, nettle_random_func random,
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/* If LIMIT is non-zero, the number must be at most LIMIT bits.
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* Implies sexp_iterator_next. */
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nettle_mpz_set_sexp(mpz_t x, unsigned limit, struct sexp_iterator *i);
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#endif /* NETTLE_BIGNUM_H_INCLUDED */
added
removed
bignum.h
