mirror of
https://github.com/openssl/openssl.git
synced 2024-12-21 06:09:35 +08:00
fd4a6e7d1e
The old version always sets the top 2 bits, so the most significate byte of the primes was always >= 0xC0. We now use 256 bits to represent 1/sqrt(2) = 0x0.B504F333F9DE64845... Reviewed-by: Shane Lontis <shane.lontis@oracle.com> Reviewed-by: Richard Levitte <levitte@openssl.org> GH: #10246
118 lines
4.5 KiB
C
118 lines
4.5 KiB
C
/*
|
|
* Copyright 2014-2018 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#ifndef OSSL_CRYPTO_BN_H
|
|
# define OSSL_CRYPTO_BN_H
|
|
|
|
# include <openssl/bn.h>
|
|
# include <limits.h>
|
|
|
|
BIGNUM *bn_wexpand(BIGNUM *a, int words);
|
|
BIGNUM *bn_expand2(BIGNUM *a, int words);
|
|
|
|
void bn_correct_top(BIGNUM *a);
|
|
|
|
/*
|
|
* Determine the modified width-(w+1) Non-Adjacent Form (wNAF) of 'scalar'.
|
|
* This is an array r[] of values that are either zero or odd with an
|
|
* absolute value less than 2^w satisfying scalar = \sum_j r[j]*2^j where at
|
|
* most one of any w+1 consecutive digits is non-zero with the exception that
|
|
* the most significant digit may be only w-1 zeros away from that next
|
|
* non-zero digit.
|
|
*/
|
|
signed char *bn_compute_wNAF(const BIGNUM *scalar, int w, size_t *ret_len);
|
|
|
|
int bn_get_top(const BIGNUM *a);
|
|
|
|
int bn_get_dmax(const BIGNUM *a);
|
|
|
|
/* Set all words to zero */
|
|
void bn_set_all_zero(BIGNUM *a);
|
|
|
|
/*
|
|
* Copy the internal BIGNUM words into out which holds size elements (and size
|
|
* must be bigger than top)
|
|
*/
|
|
int bn_copy_words(BN_ULONG *out, const BIGNUM *in, int size);
|
|
|
|
BN_ULONG *bn_get_words(const BIGNUM *a);
|
|
|
|
/*
|
|
* Set the internal data words in a to point to words which contains size
|
|
* elements. The BN_FLG_STATIC_DATA flag is set
|
|
*/
|
|
void bn_set_static_words(BIGNUM *a, const BN_ULONG *words, int size);
|
|
|
|
/*
|
|
* Copy words into the BIGNUM |a|, reallocating space as necessary.
|
|
* The negative flag of |a| is not modified.
|
|
* Returns 1 on success and 0 on failure.
|
|
*/
|
|
/*
|
|
* |num_words| is int because bn_expand2 takes an int. This is an internal
|
|
* function so we simply trust callers not to pass negative values.
|
|
*/
|
|
int bn_set_words(BIGNUM *a, const BN_ULONG *words, int num_words);
|
|
|
|
/*
|
|
* Some BIGNUM functions assume most significant limb to be non-zero, which
|
|
* is customarily arranged by bn_correct_top. Output from below functions
|
|
* is not processed with bn_correct_top, and for this reason it may not be
|
|
* returned out of public API. It may only be passed internally into other
|
|
* functions known to support non-minimal or zero-padded BIGNUMs. Even
|
|
* though the goal is to facilitate constant-time-ness, not each subroutine
|
|
* is constant-time by itself. They all have pre-conditions, consult source
|
|
* code...
|
|
*/
|
|
int bn_mul_mont_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
|
|
BN_MONT_CTX *mont, BN_CTX *ctx);
|
|
int bn_to_mont_fixed_top(BIGNUM *r, const BIGNUM *a, BN_MONT_CTX *mont,
|
|
BN_CTX *ctx);
|
|
int bn_from_mont_fixed_top(BIGNUM *r, const BIGNUM *a, BN_MONT_CTX *mont,
|
|
BN_CTX *ctx);
|
|
int bn_mod_add_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
|
|
const BIGNUM *m);
|
|
int bn_mod_sub_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
|
|
const BIGNUM *m);
|
|
int bn_mul_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
|
|
int bn_sqr_fixed_top(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
|
|
int bn_lshift_fixed_top(BIGNUM *r, const BIGNUM *a, int n);
|
|
int bn_rshift_fixed_top(BIGNUM *r, const BIGNUM *a, int n);
|
|
int bn_div_fixed_top(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m,
|
|
const BIGNUM *d, BN_CTX *ctx);
|
|
|
|
#define BN_PRIMETEST_COMPOSITE 0
|
|
#define BN_PRIMETEST_COMPOSITE_WITH_FACTOR 1
|
|
#define BN_PRIMETEST_COMPOSITE_NOT_POWER_OF_PRIME 2
|
|
#define BN_PRIMETEST_PROBABLY_PRIME 3
|
|
|
|
int bn_miller_rabin_is_prime(const BIGNUM *w, int iterations, BN_CTX *ctx,
|
|
BN_GENCB *cb, int enhanced, int *status);
|
|
|
|
const BIGNUM *bn_get0_small_factors(void);
|
|
|
|
int bn_rsa_fips186_4_prime_MR_min_checks(int nbits);
|
|
|
|
int bn_rsa_fips186_4_gen_prob_primes(BIGNUM *p, BIGNUM *Xpout,
|
|
BIGNUM *p1, BIGNUM *p2,
|
|
const BIGNUM *Xp, const BIGNUM *Xp1,
|
|
const BIGNUM *Xp2, int nlen,
|
|
const BIGNUM *e, BN_CTX *ctx,
|
|
BN_GENCB *cb);
|
|
|
|
int bn_rsa_fips186_4_derive_prime(BIGNUM *Y, BIGNUM *X, const BIGNUM *Xin,
|
|
const BIGNUM *r1, const BIGNUM *r2, int nlen,
|
|
const BIGNUM *e, BN_CTX *ctx, BN_GENCB *cb);
|
|
|
|
OPENSSL_CTX *bn_get_lib_ctx(BN_CTX *ctx);
|
|
|
|
extern const BIGNUM bn_inv_sqrt_2;
|
|
|
|
#endif
|