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Fix builds with no-dh
[thirdparty/openssl.git] / include / openssl / bn.h
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21dcbebc 1/*
6738bf14 2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
aa8f3d76 3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
48fc582f 4 *
48f4ad77 5 * Licensed under the Apache License 2.0 (the "License"). You may not use
21dcbebc
RS		 6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
48fc582f 9 */
21dcbebc 10
ae4186b0
DMSP		 11#ifndef OPENSSL_BN_H
12# define OPENSSL_BN_H
d86167ec
DMSP		 13# pragma once
14
15# include <openssl/macros.h>
936c2b9e 16# ifndef OPENSSL_NO_DEPRECATED_3_0
d86167ec
DMSP		 17# define HEADER_BN_H
18# endif
d02b48c6 19
0f113f3e
MC		 20# include <openssl/e_os2.h>
21# ifndef OPENSSL_NO_STDIO
3c27208f 22# include <stdio.h>
0f113f3e 23# endif
98186eb4 24# include <openssl/opensslconf.h>
50cd4768 25# include <openssl/types.h>
0f113f3e 26# include <openssl/crypto.h>
52df25cf 27# include <openssl/bnerr.h>
8e10f2b3 28
d02b48c6
RE		 29#ifdef __cplusplus
30extern "C" {
31#endif
32
0f113f3e 33/*
94af0cd7 34 * 64-bit processor with LP64 ABI
0f113f3e
MC		 35 */
36# ifdef SIXTY_FOUR_BIT_LONG
0f113f3e 37# define BN_ULONG unsigned long
0f113f3e 38# define BN_BYTES 8
0f113f3e 39# endif
d02b48c6 40
0f113f3e 41/*
94af0cd7 42 * 64-bit processor other than LP64 ABI
dfeab068 43 */
0f113f3e 44# ifdef SIXTY_FOUR_BIT
0f113f3e 45# define BN_ULONG unsigned long long
0f113f3e 46# define BN_BYTES 8
0f113f3e 47# endif
d02b48c6 48
0f113f3e 49# ifdef THIRTY_TWO_BIT
0f113f3e 50# define BN_ULONG unsigned int
0f113f3e 51# define BN_BYTES 4
82e8cb40 52# endif
d02b48c6 53
94af0cd7
RS		 54# define BN_BITS2 (BN_BYTES * 8)
55# define BN_BITS (BN_BITS2 * 2)
56# define BN_TBIT ((BN_ULONG)1 << (BN_BITS2 - 1))
d02b48c6 57
0f113f3e
MC		 58# define BN_FLG_MALLOCED 0x01
59# define BN_FLG_STATIC_DATA 0x02
dbd87ffc
MC		 60
61/*
62 * avoid leaking exponent information through timing,
63 * BN_mod_exp_mont() will call BN_mod_exp_mont_consttime,
64 * BN_div() will call BN_div_no_branch,
65 * BN_mod_inverse() will call BN_mod_inverse_no_branch.
66 */
0f113f3e 67# define BN_FLG_CONSTTIME 0x04
74924dcb 68# define BN_FLG_SECURE 0x08
bd31fb21 69
00db8c60 70# ifndef OPENSSL_NO_DEPRECATED_0_9_8
dbd87ffc 71/* deprecated name for the flag */
0f113f3e 72# define BN_FLG_EXP_CONSTTIME BN_FLG_CONSTTIME
60250017 73# define BN_FLG_FREE 0x8000 /* used for debugging */
0f113f3e 74# endif
85bcf27c
MC		 75
76void BN_set_flags(BIGNUM *b, int n);
77int BN_get_flags(const BIGNUM *b, int n);
dfeab068 78
f67cbb74
RS		 79/* Values for |top| in BN_rand() */
80#define BN_RAND_TOP_ANY -1
81#define BN_RAND_TOP_ONE 0
82#define BN_RAND_TOP_TWO 1
83
84/* Values for |bottom| in BN_rand() */
85#define BN_RAND_BOTTOM_ANY 0
86#define BN_RAND_BOTTOM_ODD 1
87
0f113f3e
MC		 88/*
89 * get a clone of a BIGNUM with changed flags, for *temporary* use only (the
e113c9c5
MC		 90 * two BIGNUMs cannot be used in parallel!). Also only for *read only* use. The
91 * value |dest| should be a newly allocated BIGNUM obtained via BN_new() that
92 * has not been otherwise initialised or used.
0f113f3e 93 */
e113c9c5 94void BN_with_flags(BIGNUM *dest, const BIGNUM *b, int flags);
85bcf27c 95
02e112a8 96/* Wrapper function to make using BN_GENCB easier */
e9224c71 97int BN_GENCB_call(BN_GENCB *cb, int a, int b);
85bcf27c
MC		 98
99BN_GENCB *BN_GENCB_new(void);
100void BN_GENCB_free(BN_GENCB *cb);
101
102/* Populate a BN_GENCB structure with an "old"-style callback */
0f113f3e
MC		 103void BN_GENCB_set_old(BN_GENCB *gencb, void (*callback) (int, int, void *),
104 void *cb_arg);
85bcf27c
MC		 105
106/* Populate a BN_GENCB structure with a "new"-style callback */
0f113f3e
MC		 107void BN_GENCB_set(BN_GENCB *gencb, int (*callback) (int, int, BN_GENCB *),
108 void *cb_arg);
85bcf27c
MC		 109
110void *BN_GENCB_get_arg(BN_GENCB *cb);
e9224c71 111
936c2b9e 112# ifndef OPENSSL_NO_DEPRECATED_3_0
42619397
KR		 113# define BN_prime_checks 0 /* default: select number of iterations based
114 * on the size of the number */
d02b48c6 115
0f113f3e 116/*
feac7a1c
KR		 117 * BN_prime_checks_for_size() returns the number of Miller-Rabin iterations
118 * that will be done for checking that a random number is probably prime. The
119 * error rate for accepting a composite number as prime depends on the size of
120 * the prime |b|. The error rates used are for calculating an RSA key with 2 primes,
121 * and so the level is what you would expect for a key of double the size of the
122 * prime.
123 *
124 * This table is generated using the algorithm of FIPS PUB 186-4
125 * Digital Signature Standard (DSS), section F.1, page 117.
126 * (https://dx.doi.org/10.6028/NIST.FIPS.186-4)
127 *
128 * The following magma script was used to generate the output:
129 * securitybits:=125;
130 * k:=1024;
131 * for t:=1 to 65 do
132 * for M:=3 to Floor(2*Sqrt(k-1)-1) do
133 * S:=0;
134 * // Sum over m
135 * for m:=3 to M do
136 * s:=0;
137 * // Sum over j
138 * for j:=2 to m do
139 * s+:=(RealField(32)!2)^-(j+(k-1)/j);
140 * end for;
141 * S+:=2^(m-(m-1)*t)*s;
142 * end for;
143 * A:=2^(k-2-M*t);
144 * B:=8*(Pi(RealField(32))^2-6)/3*2^(k-2)*S;
145 * pkt:=2.00743*Log(2)*k*2^-k*(A+B);
146 * seclevel:=Floor(-Log(2,pkt));
147 * if seclevel ge securitybits then
148 * printf "k: %5o, security: %o bits (t: %o, M: %o)\n",k,seclevel,t,M;
149 * break;
150 * end if;
151 * end for;
152 * if seclevel ge securitybits then break; end if;
153 * end for;
154 *
155 * It can be run online at:
156 * http://magma.maths.usyd.edu.au/calc
157 *
158 * And will output:
159 * k: 1024, security: 129 bits (t: 6, M: 23)
160 *
161 * k is the number of bits of the prime, securitybits is the level we want to
162 * reach.
163 *
164 * prime length | RSA key size | # MR tests | security level
165 * -------------+--------------|------------+---------------
166 * (b) >= 6394 | >= 12788 | 3 | 256 bit
167 * (b) >= 3747 | >= 7494 | 3 | 192 bit
168 * (b) >= 1345 | >= 2690 | 4 | 128 bit
169 * (b) >= 1080 | >= 2160 | 5 | 128 bit
170 * (b) >= 852 | >= 1704 | 5 | 112 bit
171 * (b) >= 476 | >= 952 | 5 | 80 bit
172 * (b) >= 400 | >= 800 | 6 | 80 bit
173 * (b) >= 347 | >= 694 | 7 | 80 bit
174 * (b) >= 308 | >= 616 | 8 | 80 bit
175 * (b) >= 55 | >= 110 | 27 | 64 bit
176 * (b) >= 6 | >= 12 | 34 | 64 bit
0f113f3e 177 */
feac7a1c 178
42619397
KR		 179# define BN_prime_checks_for_size(b) ((b) >= 3747 ? 3 : \
180 (b) >= 1345 ? 4 : \
181 (b) >= 476 ? 5 : \
182 (b) >= 400 ? 6 : \
183 (b) >= 347 ? 7 : \
184 (b) >= 308 ? 8 : \
185 (b) >= 55 ? 27 : \
186 /* b >= 6 */ 34)
187# endif
38e33cef 188
0f113f3e 189# define BN_num_bytes(a) ((BN_num_bits(a)+7)/8)
85bcf27c
MC		 190
191int BN_abs_is_word(const BIGNUM *a, const BN_ULONG w);
192int BN_is_zero(const BIGNUM *a);
193int BN_is_one(const BIGNUM *a);
194int BN_is_word(const BIGNUM *a, const BN_ULONG w);
195int BN_is_odd(const BIGNUM *a);
196
0f113f3e 197# define BN_one(a) (BN_set_word((a),1))
85bcf27c
MC		 198
199void BN_zero_ex(BIGNUM *a);
200
a3844061 201# if OPENSSL_API_LEVEL > 908
0f113f3e
MC		 202# define BN_zero(a) BN_zero_ex(a)
203# else
204# define BN_zero(a) (BN_set_word((a),0))
205# endif
d02b48c6 206
98499135 207const BIGNUM *BN_value_one(void);
0f113f3e 208char *BN_options(void);
7bc081dd 209BN_CTX *BN_CTX_new_ex(OPENSSL_CTX *ctx);
d02b48c6 210BN_CTX *BN_CTX_new(void);
7bc081dd 211BN_CTX *BN_CTX_secure_new_ex(OPENSSL_CTX *ctx);
74924dcb 212BN_CTX *BN_CTX_secure_new(void);
0f113f3e
MC		 213void BN_CTX_free(BN_CTX *c);
214void BN_CTX_start(BN_CTX *ctx);
9b141126 215BIGNUM *BN_CTX_get(BN_CTX *ctx);
0f113f3e 216void BN_CTX_end(BN_CTX *ctx);
ee1d4f3d 217int BN_rand_ex(BIGNUM *rnd, int bits, int top, int bottom, BN_CTX *ctx);
0f113f3e 218int BN_rand(BIGNUM *rnd, int bits, int top, int bottom);
ee1d4f3d 219int BN_priv_rand_ex(BIGNUM *rnd, int bits, int top, int bottom, BN_CTX *ctx);
ddc6a5c8 220int BN_priv_rand(BIGNUM *rnd, int bits, int top, int bottom);
ee1d4f3d 221int BN_rand_range_ex(BIGNUM *r, const BIGNUM *range, BN_CTX *ctx);
0f113f3e 222int BN_rand_range(BIGNUM *rnd, const BIGNUM *range);
ee1d4f3d 223int BN_priv_rand_range_ex(BIGNUM *r, const BIGNUM *range, BN_CTX *ctx);
ddc6a5c8 224int BN_priv_rand_range(BIGNUM *rnd, const BIGNUM *range);
5ecff87d 225int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom);
0f113f3e
MC		 226int BN_pseudo_rand_range(BIGNUM *rnd, const BIGNUM *range);
227int BN_num_bits(const BIGNUM *a);
228int BN_num_bits_word(BN_ULONG l);
229int BN_security_bits(int L, int N);
d02b48c6 230BIGNUM *BN_new(void);
74924dcb 231BIGNUM *BN_secure_new(void);
0f113f3e 232void BN_clear_free(BIGNUM *a);
84c15db5 233BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b);
0f113f3e
MC		 234void BN_swap(BIGNUM *a, BIGNUM *b);
235BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret);
236int BN_bn2bin(const BIGNUM *a, unsigned char *to);
85a4807f
DSH		 237int BN_bn2binpad(const BIGNUM *a, unsigned char *to, int tolen);
238BIGNUM *BN_lebin2bn(const unsigned char *s, int len, BIGNUM *ret);
239int BN_bn2lebinpad(const BIGNUM *a, unsigned char *to, int tolen);
fa4d419c
RL		 240BIGNUM *BN_native2bn(const unsigned char *s, int len, BIGNUM *ret);
241int BN_bn2nativepad(const BIGNUM *a, unsigned char *to, int tolen);
0f113f3e
MC		 242BIGNUM *BN_mpi2bn(const unsigned char *s, int len, BIGNUM *ret);
243int BN_bn2mpi(const BIGNUM *a, unsigned char *to);
244int BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
245int BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
246int BN_uadd(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
247int BN_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
248int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
249int BN_sqr(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
3798cb81
NL		 250/** BN_set_negative sets sign of a BIGNUM
251 * \param b pointer to the BIGNUM object
0f113f3e 252 * \param n 0 if the BIGNUM b should be positive and a value != 0 otherwise
3798cb81 253 */
0f113f3e 254void BN_set_negative(BIGNUM *b, int n);
3798cb81 255/** BN_is_negative returns 1 if the BIGNUM is negative
28c0a61b 256 * \param b pointer to the BIGNUM object
3798cb81
NL		 257 * \return 1 if a < 0 and 0 otherwise
258 */
0f113f3e
MC		 259int BN_is_negative(const BIGNUM *b);
260
261int BN_div(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m, const BIGNUM *d,
262 BN_CTX *ctx);
263# define BN_mod(rem,m,d,ctx) BN_div(NULL,(rem),(m),(d),(ctx))
264int BN_nnmod(BIGNUM *r, const BIGNUM *m, const BIGNUM *d, BN_CTX *ctx);
265int BN_mod_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,
266 BN_CTX *ctx);
267int BN_mod_add_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
268 const BIGNUM *m);
269int BN_mod_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,
270 BN_CTX *ctx);
271int BN_mod_sub_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
272 const BIGNUM *m);
273int BN_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,
274 BN_CTX *ctx);
275int BN_mod_sqr(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);
276int BN_mod_lshift1(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);
277int BN_mod_lshift1_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *m);
278int BN_mod_lshift(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m,
279 BN_CTX *ctx);
280int BN_mod_lshift_quick(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m);
5acaa495 281
7999c65c 282BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w);
dfeab068 283BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w);
0f113f3e
MC		 284int BN_mul_word(BIGNUM *a, BN_ULONG w);
285int BN_add_word(BIGNUM *a, BN_ULONG w);
286int BN_sub_word(BIGNUM *a, BN_ULONG w);
287int BN_set_word(BIGNUM *a, BN_ULONG w);
020fc820 288BN_ULONG BN_get_word(const BIGNUM *a);
5acaa495 289
0f113f3e
MC		 290int BN_cmp(const BIGNUM *a, const BIGNUM *b);
291void BN_free(BIGNUM *a);
292int BN_is_bit_set(const BIGNUM *a, int n);
293int BN_lshift(BIGNUM *r, const BIGNUM *a, int n);
294int BN_lshift1(BIGNUM *r, const BIGNUM *a);
295int BN_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
296
297int BN_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
298 const BIGNUM *m, BN_CTX *ctx);
299int BN_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
300 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
46a64376 301int BN_mod_exp_mont_consttime(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
0f113f3e
MC		 302 const BIGNUM *m, BN_CTX *ctx,
303 BN_MONT_CTX *in_mont);
304int BN_mod_exp_mont_word(BIGNUM *r, BN_ULONG a, const BIGNUM *p,
305 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
306int BN_mod_exp2_mont(BIGNUM *r, const BIGNUM *a1, const BIGNUM *p1,
307 const BIGNUM *a2, const BIGNUM *p2, const BIGNUM *m,
308 BN_CTX *ctx, BN_MONT_CTX *m_ctx);
309int BN_mod_exp_simple(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
310 const BIGNUM *m, BN_CTX *ctx);
311
312int BN_mask_bits(BIGNUM *a, int n);
313# ifndef OPENSSL_NO_STDIO
314int BN_print_fp(FILE *fp, const BIGNUM *a);
315# endif
94af0cd7 316int BN_print(BIO *bio, const BIGNUM *a);
0f113f3e
MC		 317int BN_reciprocal(BIGNUM *r, const BIGNUM *m, int len, BN_CTX *ctx);
318int BN_rshift(BIGNUM *r, const BIGNUM *a, int n);
319int BN_rshift1(BIGNUM *r, const BIGNUM *a);
320void BN_clear(BIGNUM *a);
84c15db5 321BIGNUM *BN_dup(const BIGNUM *a);
0f113f3e
MC		 322int BN_ucmp(const BIGNUM *a, const BIGNUM *b);
323int BN_set_bit(BIGNUM *a, int n);
324int BN_clear_bit(BIGNUM *a, int n);
325char *BN_bn2hex(const BIGNUM *a);
326char *BN_bn2dec(const BIGNUM *a);
327int BN_hex2bn(BIGNUM **a, const char *str);
328int BN_dec2bn(BIGNUM **a, const char *str);
329int BN_asc2bn(BIGNUM **a, const char *str);
330int BN_gcd(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
331int BN_kronecker(const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx); /* returns
332 * -2 for
333 * error */
020fc820 334BIGNUM *BN_mod_inverse(BIGNUM *ret,
0f113f3e 335 const BIGNUM *a, const BIGNUM *n, BN_CTX *ctx);
cd2eebfd 336BIGNUM *BN_mod_sqrt(BIGNUM *ret,
0f113f3e 337 const BIGNUM *a, const BIGNUM *n, BN_CTX *ctx);
e9224c71 338
0f113f3e 339void BN_consttime_swap(BN_ULONG swap, BIGNUM *a, BIGNUM *b, int nwords);
f9b6c0ba 340
e9224c71 341/* Deprecated versions */
98186eb4 342DEPRECATEDIN_0_9_8(BIGNUM *BN_generate_prime(BIGNUM *ret, int bits, int safe,
0f113f3e
MC		 343 const BIGNUM *add,
344 const BIGNUM *rem,
345 void (*callback) (int, int,
346 void *),
98186eb4
VD		 347 void *cb_arg))
348DEPRECATEDIN_0_9_8(int
0f113f3e
MC		 349 BN_is_prime(const BIGNUM *p, int nchecks,
350 void (*callback) (int, int, void *),
98186eb4
VD		 351 BN_CTX *ctx, void *cb_arg))
352DEPRECATEDIN_0_9_8(int
0f113f3e
MC		 353 BN_is_prime_fasttest(const BIGNUM *p, int nchecks,
354 void (*callback) (int, int, void *),
355 BN_CTX *ctx, void *cb_arg,
98186eb4 356 int do_trial_division))
e9224c71 357
936c2b9e
RL		 358DEPRECATEDIN_3_0(int BN_is_prime_ex(const BIGNUM *p, int nchecks, BN_CTX *ctx, BN_GENCB *cb))
359DEPRECATEDIN_3_0(int BN_is_prime_fasttest_ex(const BIGNUM *p, int nchecks, BN_CTX *ctx,
42619397 360 int do_trial_division, BN_GENCB *cb))
e9224c71 361/* Newer versions */
2934be91
MC		 362int BN_generate_prime_ex2(BIGNUM *ret, int bits, int safe,
363 const BIGNUM *add, const BIGNUM *rem, BN_GENCB *cb,
364 BN_CTX *ctx);
0f113f3e
MC		 365int BN_generate_prime_ex(BIGNUM *ret, int bits, int safe, const BIGNUM *add,
366 const BIGNUM *rem, BN_GENCB *cb);
42619397 367int BN_check_prime(const BIGNUM *p, BN_CTX *ctx, BN_GENCB *cb);
d02b48c6 368
7b1a0451
DSH		 369int BN_X931_generate_Xpq(BIGNUM *Xp, BIGNUM *Xq, int nbits, BN_CTX *ctx);
370
371int BN_X931_derive_prime_ex(BIGNUM *p, BIGNUM *p1, BIGNUM *p2,
0f113f3e
MC		 372 const BIGNUM *Xp, const BIGNUM *Xp1,
373 const BIGNUM *Xp2, const BIGNUM *e, BN_CTX *ctx,
374 BN_GENCB *cb);
375int BN_X931_generate_prime_ex(BIGNUM *p, BIGNUM *p1, BIGNUM *p2, BIGNUM *Xp1,
376 BIGNUM *Xp2, const BIGNUM *Xp, const BIGNUM *e,
377 BN_CTX *ctx, BN_GENCB *cb);
378
379BN_MONT_CTX *BN_MONT_CTX_new(void);
380int BN_mod_mul_montgomery(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
381 BN_MONT_CTX *mont, BN_CTX *ctx);
382int BN_to_montgomery(BIGNUM *r, const BIGNUM *a, BN_MONT_CTX *mont,
383 BN_CTX *ctx);
384int BN_from_montgomery(BIGNUM *r, const BIGNUM *a, BN_MONT_CTX *mont,
385 BN_CTX *ctx);
d02b48c6 386void BN_MONT_CTX_free(BN_MONT_CTX *mont);
0f113f3e
MC		 387int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx);
388BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to, BN_MONT_CTX *from);
d188a536 389BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, CRYPTO_RWLOCK *lock,
0f113f3e 390 const BIGNUM *mod, BN_CTX *ctx);
d02b48c6 391
800e400d 392/* BN_BLINDING flags */
0f113f3e
MC		 393# define BN_BLINDING_NO_UPDATE 0x00000001
394# define BN_BLINDING_NO_RECREATE 0x00000002
800e400d
NL		 395
396BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, BIGNUM *mod);
58964a49 397void BN_BLINDING_free(BN_BLINDING *b);
0f113f3e 398int BN_BLINDING_update(BN_BLINDING *b, BN_CTX *ctx);
800e400d 399int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
58964a49 400int BN_BLINDING_invert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
800e400d 401int BN_BLINDING_convert_ex(BIGNUM *n, BIGNUM *r, BN_BLINDING *b, BN_CTX *);
0f113f3e
MC		 402int BN_BLINDING_invert_ex(BIGNUM *n, const BIGNUM *r, BN_BLINDING *b,
403 BN_CTX *);
0b1a07c8
AG		 404
405int BN_BLINDING_is_current_thread(BN_BLINDING *b);
406void BN_BLINDING_set_current_thread(BN_BLINDING *b);
407int BN_BLINDING_lock(BN_BLINDING *b);
408int BN_BLINDING_unlock(BN_BLINDING *b);
409
800e400d
NL		 410unsigned long BN_BLINDING_get_flags(const BN_BLINDING *);
411void BN_BLINDING_set_flags(BN_BLINDING *, unsigned long);
412BN_BLINDING *BN_BLINDING_create_param(BN_BLINDING *b,
0f113f3e
MC		 413 const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
414 int (*bn_mod_exp) (BIGNUM *r,
415 const BIGNUM *a,
416 const BIGNUM *p,
417 const BIGNUM *m,
418 BN_CTX *ctx,
419 BN_MONT_CTX *m_ctx),
420 BN_MONT_CTX *m_ctx);
421
98186eb4
VD		 422DEPRECATEDIN_0_9_8(void BN_set_params(int mul, int high, int low, int mont))
423DEPRECATEDIN_0_9_8(int BN_get_params(int which)) /* 0, mul, 1 high, 2 low, 3
424 * mont */
dfeab068 425
dfeab068 426BN_RECP_CTX *BN_RECP_CTX_new(void);
0f113f3e
MC		 427void BN_RECP_CTX_free(BN_RECP_CTX *recp);
428int BN_RECP_CTX_set(BN_RECP_CTX *recp, const BIGNUM *rdiv, BN_CTX *ctx);
429int BN_mod_mul_reciprocal(BIGNUM *r, const BIGNUM *x, const BIGNUM *y,
430 BN_RECP_CTX *recp, BN_CTX *ctx);
431int BN_mod_exp_recp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
432 const BIGNUM *m, BN_CTX *ctx);
433int BN_div_recp(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m,
434 BN_RECP_CTX *recp, BN_CTX *ctx);
435
436# ifndef OPENSSL_NO_EC2M
437
438/*
439 * Functions for arithmetic over binary polynomials represented by BIGNUMs.
b53e44e5 440 * The BIGNUM::neg property of BIGNUMs representing binary polynomials is
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MC		 441 * ignored. Note that input arguments are not const so that their bit arrays
442 * can be expanded to the appropriate size if needed.
1dc920c8 443 */
b53e44e5 444
0f113f3e
MC		 445/*
446 * r = a + b
447 */
448int BN_GF2m_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
449# define BN_GF2m_sub(r, a, b) BN_GF2m_add(r, a, b)
450/*
451 * r=a mod p
452 */
453int BN_GF2m_mod(BIGNUM *r, const BIGNUM *a, const BIGNUM *p);
e636e2ac 454/* r = (a * b) mod p */
0f113f3e
MC		 455int BN_GF2m_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
456 const BIGNUM *p, BN_CTX *ctx);
e636e2ac 457/* r = (a * a) mod p */
0f113f3e 458int BN_GF2m_mod_sqr(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
e636e2ac 459/* r = (1 / b) mod p */
0f113f3e 460int BN_GF2m_mod_inv(BIGNUM *r, const BIGNUM *b, const BIGNUM *p, BN_CTX *ctx);
e636e2ac 461/* r = (a / b) mod p */
0f113f3e
MC		 462int BN_GF2m_mod_div(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
463 const BIGNUM *p, BN_CTX *ctx);
e636e2ac 464/* r = (a ^ b) mod p */
0f113f3e
MC		 465int BN_GF2m_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
466 const BIGNUM *p, BN_CTX *ctx);
e636e2ac 467/* r = sqrt(a) mod p */
0f113f3e
MC		 468int BN_GF2m_mod_sqrt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
469 BN_CTX *ctx);
e636e2ac 470/* r^2 + r = a mod p */
0f113f3e
MC		 471int BN_GF2m_mod_solve_quad(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
472 BN_CTX *ctx);
473# define BN_GF2m_cmp(a, b) BN_ucmp((a), (b))
c80fd6b2
MC		 474/*-
475 * Some functions allow for representation of the irreducible polynomials
1dc920c8
BM		 476 * as an unsigned int[], say p. The irreducible f(t) is then of the form:
477 * t^p[0] + t^p[1] + ... + t^p[k]
478 * where m = p[0] > p[1] > ... > p[k] = 0.
479 */
e636e2ac 480/* r = a mod p */
0f113f3e 481int BN_GF2m_mod_arr(BIGNUM *r, const BIGNUM *a, const int p[]);
e636e2ac 482/* r = (a * b) mod p */
0f113f3e
MC		 483int BN_GF2m_mod_mul_arr(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
484 const int p[], BN_CTX *ctx);
e636e2ac 485/* r = (a * a) mod p */
0f113f3e
MC		 486int BN_GF2m_mod_sqr_arr(BIGNUM *r, const BIGNUM *a, const int p[],
487 BN_CTX *ctx);
e636e2ac 488/* r = (1 / b) mod p */
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MC		 489int BN_GF2m_mod_inv_arr(BIGNUM *r, const BIGNUM *b, const int p[],
490 BN_CTX *ctx);
e636e2ac 491/* r = (a / b) mod p */
0f113f3e
MC		 492int BN_GF2m_mod_div_arr(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
493 const int p[], BN_CTX *ctx);
e636e2ac 494/* r = (a ^ b) mod p */
0f113f3e
MC		 495int BN_GF2m_mod_exp_arr(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
496 const int p[], BN_CTX *ctx);
e636e2ac 497/* r = sqrt(a) mod p */
0f113f3e
MC		 498int BN_GF2m_mod_sqrt_arr(BIGNUM *r, const BIGNUM *a,
499 const int p[], BN_CTX *ctx);
e636e2ac 500/* r^2 + r = a mod p */
0f113f3e
MC		 501int BN_GF2m_mod_solve_quad_arr(BIGNUM *r, const BIGNUM *a,
502 const int p[], BN_CTX *ctx);
503int BN_GF2m_poly2arr(const BIGNUM *a, int p[], int max);
504int BN_GF2m_arr2poly(const int p[], BIGNUM *a);
1dc920c8 505
0f113f3e 506# endif
c9a90645 507
0f113f3e
MC		 508/*
509 * faster mod functions for the 'NIST primes' 0 <= a < p^2
510 */
5c6bf031
BM		 511int BN_nist_mod_192(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
512int BN_nist_mod_224(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
513int BN_nist_mod_256(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
514int BN_nist_mod_384(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
515int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
516
517const BIGNUM *BN_get0_nist_prime_192(void);
518const BIGNUM *BN_get0_nist_prime_224(void);
519const BIGNUM *BN_get0_nist_prime_256(void);
520const BIGNUM *BN_get0_nist_prime_384(void);
521const BIGNUM *BN_get0_nist_prime_521(void);
522
0f113f3e
MC		 523int (*BN_nist_mod_func(const BIGNUM *p)) (BIGNUM *r, const BIGNUM *a,
524 const BIGNUM *field, BN_CTX *ctx);
8a99cb29 525
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MC		 526int BN_generate_dsa_nonce(BIGNUM *out, const BIGNUM *range,
527 const BIGNUM *priv, const unsigned char *message,
528 size_t message_len, BN_CTX *ctx);
775c63fc 529
5ce87e11 530# ifndef OPENSSL_NO_DH
bf3d6c0c 531/* Primes from RFC 2409 */
9021a5df
RS		 532BIGNUM *BN_get_rfc2409_prime_768(BIGNUM *bn);
533BIGNUM *BN_get_rfc2409_prime_1024(BIGNUM *bn);
bf3d6c0c
BL		 534
535/* Primes from RFC 3526 */
9021a5df
RS		 536BIGNUM *BN_get_rfc3526_prime_1536(BIGNUM *bn);
537BIGNUM *BN_get_rfc3526_prime_2048(BIGNUM *bn);
538BIGNUM *BN_get_rfc3526_prime_3072(BIGNUM *bn);
539BIGNUM *BN_get_rfc3526_prime_4096(BIGNUM *bn);
540BIGNUM *BN_get_rfc3526_prime_6144(BIGNUM *bn);
541BIGNUM *BN_get_rfc3526_prime_8192(BIGNUM *bn);
542
5ce87e11
MC		 543# ifndef OPENSSL_NO_DEPRECATED_1_1_0
544# define get_rfc2409_prime_768 BN_get_rfc2409_prime_768
545# define get_rfc2409_prime_1024 BN_get_rfc2409_prime_1024
546# define get_rfc3526_prime_1536 BN_get_rfc3526_prime_1536
547# define get_rfc3526_prime_2048 BN_get_rfc3526_prime_2048
548# define get_rfc3526_prime_3072 BN_get_rfc3526_prime_3072
549# define get_rfc3526_prime_4096 BN_get_rfc3526_prime_4096
550# define get_rfc3526_prime_6144 BN_get_rfc3526_prime_6144
551# define get_rfc3526_prime_8192 BN_get_rfc3526_prime_8192
552# endif
9021a5df 553# endif
bf3d6c0c 554
0f113f3e 555int BN_bntest_rand(BIGNUM *rnd, int bits, int top, int bottom);
85bcf27c 556
6d311938 557
0cd0a820 558# ifdef __cplusplus
d02b48c6 559}
0cd0a820 560# endif
d02b48c6 561#endif
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