2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
61 * Portions of the attached software ("Contribution") are developed by
62 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
64 * The Contribution is licensed pursuant to the Eric Young open source
65 * license provided above.
67 * The binary polynomial arithmetic software is originally written by
68 * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
75 #include <openssl/e_os2.h>
76 #ifndef OPENSSL_NO_FP_API
77 #include <stdio.h> /* FILE */
79 #include <openssl/ossl_typ.h>
85 /* These preprocessor symbols control various aspects of the bignum headers and
86 * library code. They're not defined by any "normal" configuration, as they are
87 * intended for development and testing purposes. NB: defining all three can be
88 * useful for debugging application code as well as openssl itself.
90 * BN_DEBUG - turn on various debugging alterations to the bignum code
91 * BN_DEBUG_RAND - uses random poisoning of unused words to trip up
92 * mismanagement of bignum internals. You must also define BN_DEBUG.
94 /* #define BN_DEBUG */
95 /* #define BN_DEBUG_RAND */
101 /* This next option uses the C libraries (2 word)/(1 word) function.
102 * If it is not defined, I use my C version (which is slower).
103 * The reason for this flag is that when the particular C compiler
104 * library routine is used, and the library is linked with a different
105 * compiler, the library is missing. This mostly happens when the
106 * library is built with gcc and then linked using normal cc. This would
107 * be a common occurrence because gcc normally produces code that is
108 * 2 times faster than system compilers for the big number stuff.
109 * For machines with only one compiler (or shared libraries), this should
110 * be on. Again this in only really a problem on machines
111 * using "long long's", are 32bit, and are not using my assembler code. */
112 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || \
113 defined(OPENSSL_SYS_WIN32) || defined(linux)
119 /* assuming long is 64bit - this is the DEC Alpha
120 * unsigned long long is only 64 bits :-(, don't define
121 * BN_LLONG for the DEC Alpha */
122 #ifdef SIXTY_FOUR_BIT_LONG
123 #define BN_ULLONG unsigned long long
124 #define BN_ULONG unsigned long
130 #define BN_MASK (0xffffffffffffffffffffffffffffffffLL)
131 #define BN_MASK2 (0xffffffffffffffffL)
132 #define BN_MASK2l (0xffffffffL)
133 #define BN_MASK2h (0xffffffff00000000L)
134 #define BN_MASK2h1 (0xffffffff80000000L)
135 #define BN_TBIT (0x8000000000000000L)
136 #define BN_DEC_CONV (10000000000000000000UL)
137 #define BN_DEC_FMT1 "%lu"
138 #define BN_DEC_FMT2 "%019lu"
139 #define BN_DEC_NUM 19
142 /* This is where the long long data type is 64 bits, but long is 32.
143 * For machines where there are 64bit registers, this is the mode to use.
144 * IRIX, on R4000 and above should use this mode, along with the relevant
145 * assembler code :-). Do NOT define BN_LLONG.
147 #ifdef SIXTY_FOUR_BIT
150 #define BN_ULONG unsigned long long
151 #define BN_LONG long long
156 #define BN_MASK2 (0xffffffffffffffffLL)
157 #define BN_MASK2l (0xffffffffL)
158 #define BN_MASK2h (0xffffffff00000000LL)
159 #define BN_MASK2h1 (0xffffffff80000000LL)
160 #define BN_TBIT (0x8000000000000000LL)
161 #define BN_DEC_CONV (10000000000000000000ULL)
162 #define BN_DEC_FMT1 "%llu"
163 #define BN_DEC_FMT2 "%019llu"
164 #define BN_DEC_NUM 19
167 #ifdef THIRTY_TWO_BIT
169 # if defined(OPENSSL_SYS_WIN32) && !defined(__GNUC__)
170 # define BN_ULLONG unsigned __int64
172 # define BN_ULLONG unsigned long long
175 #define BN_ULONG unsigned long
181 #ifdef OPENSSL_SYS_WIN32
182 /* VC++ doesn't like the LL suffix */
183 #define BN_MASK (0xffffffffffffffffL)
185 #define BN_MASK (0xffffffffffffffffLL)
187 #define BN_MASK2 (0xffffffffL)
188 #define BN_MASK2l (0xffff)
189 #define BN_MASK2h1 (0xffff8000L)
190 #define BN_MASK2h (0xffff0000L)
191 #define BN_TBIT (0x80000000L)
192 #define BN_DEC_CONV (1000000000L)
193 #define BN_DEC_FMT1 "%lu"
194 #define BN_DEC_FMT2 "%09lu"
202 #define BN_ULLONG unsigned long
203 #define BN_ULONG unsigned short
204 #define BN_LONG short
209 #define BN_MASK (0xffffffff)
210 #define BN_MASK2 (0xffff)
211 #define BN_MASK2l (0xff)
212 #define BN_MASK2h1 (0xff80)
213 #define BN_MASK2h (0xff00)
214 #define BN_TBIT (0x8000)
215 #define BN_DEC_CONV (100000)
216 #define BN_DEC_FMT1 "%u"
217 #define BN_DEC_FMT2 "%05u"
225 #define BN_ULLONG unsigned short
226 #define BN_ULONG unsigned char
232 #define BN_MASK (0xffff)
233 #define BN_MASK2 (0xff)
234 #define BN_MASK2l (0xf)
235 #define BN_MASK2h1 (0xf8)
236 #define BN_MASK2h (0xf0)
237 #define BN_TBIT (0x80)
238 #define BN_DEC_CONV (100)
239 #define BN_DEC_FMT1 "%u"
240 #define BN_DEC_FMT2 "%02u"
244 #define BN_DEFAULT_BITS 1280
246 #define BN_FLG_MALLOCED 0x01
247 #define BN_FLG_STATIC_DATA 0x02
248 #define BN_FLG_EXP_CONSTTIME 0x04 /* avoid leaking exponent information through timings
249 * (BN_mod_exp_mont() will call BN_mod_exp_mont_consttime) */
250 #ifndef OPENSSL_NO_DEPRECATED
251 #define BN_FLG_FREE 0x8000 /* used for debuging */
253 #define BN_set_flags(b,n) ((b)->flags|=(n))
254 #define BN_get_flags(b,n) ((b)->flags&(n))
256 /* get a clone of a BIGNUM with changed flags, for *temporary* use only
257 * (the two BIGNUMs cannot not be used in parallel!) */
258 #define BN_with_flags(dest,b,n) ((dest)->d=(b)->d, \
259 (dest)->top=(b)->top, \
260 (dest)->dmax=(b)->dmax, \
261 (dest)->neg=(b)->neg, \
262 (dest)->flags=(((dest)->flags & BN_FLG_MALLOCED) \
263 | ((b)->flags & ~BN_FLG_MALLOCED) \
264 | BN_FLG_STATIC_DATA \
267 /* Already declared in ossl_typ.h */
269 typedef struct bignum_st BIGNUM;
270 /* Used for temp variables (declaration hidden in bn_lcl.h) */
271 typedef struct bignum_ctx BN_CTX;
272 typedef struct bn_blinding_st BN_BLINDING;
273 typedef struct bn_mont_ctx_st BN_MONT_CTX;
274 typedef struct bn_recp_ctx_st BN_RECP_CTX;
275 typedef struct bn_gencb_st BN_GENCB;
280 BN_ULONG *d; /* Pointer to an array of 'BN_BITS2' bit chunks. */
281 int top; /* Index of last used d +1. */
282 /* The next are internal book keeping for bn_expand. */
283 int dmax; /* Size of the d array. */
284 int neg; /* one if the number is negative */
288 /* Used for montgomery multiplication */
289 struct bn_mont_ctx_st
291 int ri; /* number of bits in R */
292 BIGNUM RR; /* used to convert to montgomery form */
293 BIGNUM N; /* The modulus */
294 BIGNUM Ni; /* R*(1/R mod N) - N*Ni = 1
295 * (Ni is only stored for bignum algorithm) */
296 BN_ULONG n0; /* least significant word of Ni */
300 /* Used for reciprocal division/mod functions
301 * It cannot be shared between threads
303 struct bn_recp_ctx_st
305 BIGNUM N; /* the divisor */
306 BIGNUM Nr; /* the reciprocal */
312 /* Used for slow "generation" functions. */
315 unsigned int ver; /* To handle binary (in)compatibility */
316 void *arg; /* callback-specific data */
319 /* if(ver==1) - handles old style callbacks */
320 void (*cb_1)(int, int, void *);
321 /* if(ver==2) - new callback style */
322 int (*cb_2)(int, int, BN_GENCB *);
325 /* Wrapper function to make using BN_GENCB easier, */
326 int BN_GENCB_call(BN_GENCB *cb, int a, int b);
327 /* Macro to populate a BN_GENCB structure with an "old"-style callback */
328 #define BN_GENCB_set_old(gencb, callback, cb_arg) { \
329 BN_GENCB *tmp_gencb = (gencb); \
330 tmp_gencb->ver = 1; \
331 tmp_gencb->arg = (cb_arg); \
332 tmp_gencb->cb.cb_1 = (callback); }
333 /* Macro to populate a BN_GENCB structure with a "new"-style callback */
334 #define BN_GENCB_set(gencb, callback, cb_arg) { \
335 BN_GENCB *tmp_gencb = (gencb); \
336 tmp_gencb->ver = 2; \
337 tmp_gencb->arg = (cb_arg); \
338 tmp_gencb->cb.cb_2 = (callback); }
340 #define BN_prime_checks 0 /* default: select number of iterations
341 based on the size of the number */
343 /* number of Miller-Rabin iterations for an error rate of less than 2^-80
344 * for random 'b'-bit input, b >= 100 (taken from table 4.4 in the Handbook
345 * of Applied Cryptography [Menezes, van Oorschot, Vanstone; CRC Press 1996];
346 * original paper: Damgaard, Landrock, Pomerance: Average case error estimates
347 * for the strong probable prime test. -- Math. Comp. 61 (1993) 177-194) */
348 #define BN_prime_checks_for_size(b) ((b) >= 1300 ? 2 : \
361 #define BN_num_bytes(a) ((BN_num_bits(a)+7)/8)
363 /* Note that BN_abs_is_word didn't work reliably for w == 0 until 0.9.8 */
364 #define BN_abs_is_word(a,w) ((((a)->top == 1) && ((a)->d[0] == (BN_ULONG)(w))) || \
365 (((w) == 0) && ((a)->top == 0)))
366 #define BN_is_zero(a) ((a)->top == 0)
367 #define BN_is_one(a) (BN_abs_is_word((a),1) && !(a)->neg)
368 #define BN_is_word(a,w) (BN_abs_is_word((a),(w)) && (!(w) || !(a)->neg))
369 #define BN_is_odd(a) (((a)->top > 0) && ((a)->d[0] & 1))
371 #define BN_one(a) (BN_set_word((a),1))
372 #define BN_zero_ex(a) \
374 BIGNUM *_tmp_bn = (a); \
378 #ifdef OPENSSL_NO_DEPRECATED
379 #define BN_zero(a) BN_zero_ex(a)
381 #define BN_zero(a) (BN_set_word((a),0))
384 const BIGNUM *BN_value_one(void);
385 char * BN_options(void);
386 BN_CTX *BN_CTX_new(void);
387 #ifndef OPENSSL_NO_DEPRECATED
388 void BN_CTX_init(BN_CTX *c);
390 void BN_CTX_free(BN_CTX *c);
391 void BN_CTX_start(BN_CTX *ctx);
392 BIGNUM *BN_CTX_get(BN_CTX *ctx);
393 void BN_CTX_end(BN_CTX *ctx);
394 int BN_rand(BIGNUM *rnd, int bits, int top,int bottom);
395 int BN_pseudo_rand(BIGNUM *rnd, int bits, int top,int bottom);
396 int BN_rand_range(BIGNUM *rnd, BIGNUM *range);
397 int BN_pseudo_rand_range(BIGNUM *rnd, BIGNUM *range);
398 int BN_num_bits(const BIGNUM *a);
399 int BN_num_bits_word(BN_ULONG);
400 BIGNUM *BN_new(void);
401 void BN_init(BIGNUM *);
402 void BN_clear_free(BIGNUM *a);
403 BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b);
404 void BN_swap(BIGNUM *a, BIGNUM *b);
405 BIGNUM *BN_bin2bn(const unsigned char *s,int len,BIGNUM *ret);
406 int BN_bn2bin(const BIGNUM *a, unsigned char *to);
407 BIGNUM *BN_mpi2bn(const unsigned char *s,int len,BIGNUM *ret);
408 int BN_bn2mpi(const BIGNUM *a, unsigned char *to);
409 int BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
410 int BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
411 int BN_uadd(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
412 int BN_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
413 int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
414 int BN_sqr(BIGNUM *r, const BIGNUM *a,BN_CTX *ctx);
415 /* BN_set_negative(): sets sign of a bignum */
416 void BN_set_negative(BIGNUM *b, int n);
417 /* BN_get_negative(): returns 1 if the bignum is < 0 and 0 otherwise */
418 #define BN_is_negative(a) ((a)->neg != 0)
420 int BN_div(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m, const BIGNUM *d,
422 #define BN_mod(rem,m,d,ctx) BN_div(NULL,(rem),(m),(d),(ctx))
423 int BN_nnmod(BIGNUM *r, const BIGNUM *m, const BIGNUM *d, BN_CTX *ctx);
424 int BN_mod_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m, BN_CTX *ctx);
425 int BN_mod_add_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m);
426 int BN_mod_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m, BN_CTX *ctx);
427 int BN_mod_sub_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m);
428 int BN_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
429 const BIGNUM *m, BN_CTX *ctx);
430 int BN_mod_sqr(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);
431 int BN_mod_lshift1(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);
432 int BN_mod_lshift1_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *m);
433 int BN_mod_lshift(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m, BN_CTX *ctx);
434 int BN_mod_lshift_quick(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m);
436 BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w);
437 BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w);
438 int BN_mul_word(BIGNUM *a, BN_ULONG w);
439 int BN_add_word(BIGNUM *a, BN_ULONG w);
440 int BN_sub_word(BIGNUM *a, BN_ULONG w);
441 int BN_set_word(BIGNUM *a, BN_ULONG w);
442 BN_ULONG BN_get_word(const BIGNUM *a);
444 int BN_cmp(const BIGNUM *a, const BIGNUM *b);
445 void BN_free(BIGNUM *a);
446 int BN_is_bit_set(const BIGNUM *a, int n);
447 int BN_lshift(BIGNUM *r, const BIGNUM *a, int n);
448 int BN_lshift1(BIGNUM *r, const BIGNUM *a);
449 int BN_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,BN_CTX *ctx);
451 int BN_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
452 const BIGNUM *m,BN_CTX *ctx);
453 int BN_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
454 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
455 int BN_mod_exp_mont_consttime(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
456 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont);
457 int BN_mod_exp_mont_word(BIGNUM *r, BN_ULONG a, const BIGNUM *p,
458 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
459 int BN_mod_exp2_mont(BIGNUM *r, const BIGNUM *a1, const BIGNUM *p1,
460 const BIGNUM *a2, const BIGNUM *p2,const BIGNUM *m,
461 BN_CTX *ctx,BN_MONT_CTX *m_ctx);
462 int BN_mod_exp_simple(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
463 const BIGNUM *m,BN_CTX *ctx);
465 int BN_mask_bits(BIGNUM *a,int n);
466 #ifndef OPENSSL_NO_FP_API
467 int BN_print_fp(FILE *fp, const BIGNUM *a);
470 int BN_print(BIO *fp, const BIGNUM *a);
472 int BN_print(void *fp, const BIGNUM *a);
474 int BN_reciprocal(BIGNUM *r, const BIGNUM *m, int len, BN_CTX *ctx);
475 int BN_rshift(BIGNUM *r, const BIGNUM *a, int n);
476 int BN_rshift1(BIGNUM *r, const BIGNUM *a);
477 void BN_clear(BIGNUM *a);
478 BIGNUM *BN_dup(const BIGNUM *a);
479 int BN_ucmp(const BIGNUM *a, const BIGNUM *b);
480 int BN_set_bit(BIGNUM *a, int n);
481 int BN_clear_bit(BIGNUM *a, int n);
482 char * BN_bn2hex(const BIGNUM *a);
483 char * BN_bn2dec(const BIGNUM *a);
484 int BN_hex2bn(BIGNUM **a, const char *str);
485 int BN_dec2bn(BIGNUM **a, const char *str);
486 int BN_gcd(BIGNUM *r,const BIGNUM *a,const BIGNUM *b,BN_CTX *ctx);
487 int BN_kronecker(const BIGNUM *a,const BIGNUM *b,BN_CTX *ctx); /* returns -2 for error */
488 BIGNUM *BN_mod_inverse(BIGNUM *ret,
489 const BIGNUM *a, const BIGNUM *n,BN_CTX *ctx);
490 BIGNUM *BN_mod_sqrt(BIGNUM *ret,
491 const BIGNUM *a, const BIGNUM *n,BN_CTX *ctx);
493 /* Deprecated versions */
494 #ifndef OPENSSL_NO_DEPRECATED
495 BIGNUM *BN_generate_prime(BIGNUM *ret,int bits,int safe,
496 const BIGNUM *add, const BIGNUM *rem,
497 void (*callback)(int,int,void *),void *cb_arg);
498 int BN_is_prime(const BIGNUM *p,int nchecks,
499 void (*callback)(int,int,void *),
500 BN_CTX *ctx,void *cb_arg);
501 int BN_is_prime_fasttest(const BIGNUM *p,int nchecks,
502 void (*callback)(int,int,void *),BN_CTX *ctx,void *cb_arg,
503 int do_trial_division);
504 #endif /* !defined(OPENSSL_NO_DEPRECATED) */
507 int BN_generate_prime_ex(BIGNUM *ret,int bits,int safe, const BIGNUM *add,
508 const BIGNUM *rem, BN_GENCB *cb);
509 int BN_is_prime_ex(const BIGNUM *p,int nchecks, BN_CTX *ctx, BN_GENCB *cb);
510 int BN_is_prime_fasttest_ex(const BIGNUM *p,int nchecks, BN_CTX *ctx,
511 int do_trial_division, BN_GENCB *cb);
513 BN_MONT_CTX *BN_MONT_CTX_new(void );
514 void BN_MONT_CTX_init(BN_MONT_CTX *ctx);
515 int BN_mod_mul_montgomery(BIGNUM *r,const BIGNUM *a,const BIGNUM *b,
516 BN_MONT_CTX *mont, BN_CTX *ctx);
517 #define BN_to_montgomery(r,a,mont,ctx) BN_mod_mul_montgomery(\
518 (r),(a),&((mont)->RR),(mont),(ctx))
519 int BN_from_montgomery(BIGNUM *r,const BIGNUM *a,
520 BN_MONT_CTX *mont, BN_CTX *ctx);
521 void BN_MONT_CTX_free(BN_MONT_CTX *mont);
522 int BN_MONT_CTX_set(BN_MONT_CTX *mont,const BIGNUM *mod,BN_CTX *ctx);
523 BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to,BN_MONT_CTX *from);
524 BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
525 const BIGNUM *mod, BN_CTX *ctx);
527 /* BN_BLINDING flags */
528 #define BN_BLINDING_NO_UPDATE 0x00000001
529 #define BN_BLINDING_NO_RECREATE 0x00000002
531 BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, BIGNUM *mod);
532 void BN_BLINDING_free(BN_BLINDING *b);
533 int BN_BLINDING_update(BN_BLINDING *b,BN_CTX *ctx);
534 int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
535 int BN_BLINDING_invert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
536 int BN_BLINDING_convert_ex(BIGNUM *n, BIGNUM *r, BN_BLINDING *b, BN_CTX *);
537 int BN_BLINDING_invert_ex(BIGNUM *n, const BIGNUM *r, BN_BLINDING *b, BN_CTX *);
538 unsigned long BN_BLINDING_get_thread_id(const BN_BLINDING *);
539 void BN_BLINDING_set_thread_id(BN_BLINDING *, unsigned long);
540 unsigned long BN_BLINDING_get_flags(const BN_BLINDING *);
541 void BN_BLINDING_set_flags(BN_BLINDING *, unsigned long);
542 BN_BLINDING *BN_BLINDING_create_param(BN_BLINDING *b,
543 const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
544 int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
545 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx),
548 #ifndef OPENSSL_NO_DEPRECATED
549 void BN_set_params(int mul,int high,int low,int mont);
550 int BN_get_params(int which); /* 0, mul, 1 high, 2 low, 3 mont */
553 void BN_RECP_CTX_init(BN_RECP_CTX *recp);
554 BN_RECP_CTX *BN_RECP_CTX_new(void);
555 void BN_RECP_CTX_free(BN_RECP_CTX *recp);
556 int BN_RECP_CTX_set(BN_RECP_CTX *recp,const BIGNUM *rdiv,BN_CTX *ctx);
557 int BN_mod_mul_reciprocal(BIGNUM *r, const BIGNUM *x, const BIGNUM *y,
558 BN_RECP_CTX *recp,BN_CTX *ctx);
559 int BN_mod_exp_recp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
560 const BIGNUM *m, BN_CTX *ctx);
561 int BN_div_recp(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m,
562 BN_RECP_CTX *recp, BN_CTX *ctx);
564 /* Functions for arithmetic over binary polynomials represented by BIGNUMs.
566 * The BIGNUM::neg property of BIGNUMs representing binary polynomials is
569 * Note that input arguments are not const so that their bit arrays can
570 * be expanded to the appropriate size if needed.
573 int BN_GF2m_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b); /*r = a + b*/
574 #define BN_GF2m_sub(r, a, b) BN_GF2m_add(r, a, b)
575 int BN_GF2m_mod(BIGNUM *r, const BIGNUM *a, const BIGNUM *p); /*r=a mod p*/
576 int BN_GF2m_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
577 const BIGNUM *p, BN_CTX *ctx); /* r = (a * b) mod p */
578 int BN_GF2m_mod_sqr(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
579 BN_CTX *ctx); /* r = (a * a) mod p */
580 int BN_GF2m_mod_inv(BIGNUM *r, const BIGNUM *b, const BIGNUM *p,
581 BN_CTX *ctx); /* r = (1 / b) mod p */
582 int BN_GF2m_mod_div(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
583 const BIGNUM *p, BN_CTX *ctx); /* r = (a / b) mod p */
584 int BN_GF2m_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
585 const BIGNUM *p, BN_CTX *ctx); /* r = (a ^ b) mod p */
586 int BN_GF2m_mod_sqrt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
587 BN_CTX *ctx); /* r = sqrt(a) mod p */
588 int BN_GF2m_mod_solve_quad(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
589 BN_CTX *ctx); /* r^2 + r = a mod p */
590 #define BN_GF2m_cmp(a, b) BN_ucmp((a), (b))
591 /* Some functions allow for representation of the irreducible polynomials
592 * as an unsigned int[], say p. The irreducible f(t) is then of the form:
593 * t^p[0] + t^p[1] + ... + t^p[k]
594 * where m = p[0] > p[1] > ... > p[k] = 0.
596 int BN_GF2m_mod_arr(BIGNUM *r, const BIGNUM *a, const unsigned int p[]);
598 int BN_GF2m_mod_mul_arr(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
599 const unsigned int p[], BN_CTX *ctx); /* r = (a * b) mod p */
600 int BN_GF2m_mod_sqr_arr(BIGNUM *r, const BIGNUM *a, const unsigned int p[],
601 BN_CTX *ctx); /* r = (a * a) mod p */
602 int BN_GF2m_mod_inv_arr(BIGNUM *r, const BIGNUM *b, const unsigned int p[],
603 BN_CTX *ctx); /* r = (1 / b) mod p */
604 int BN_GF2m_mod_div_arr(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
605 const unsigned int p[], BN_CTX *ctx); /* r = (a / b) mod p */
606 int BN_GF2m_mod_exp_arr(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
607 const unsigned int p[], BN_CTX *ctx); /* r = (a ^ b) mod p */
608 int BN_GF2m_mod_sqrt_arr(BIGNUM *r, const BIGNUM *a,
609 const unsigned int p[], BN_CTX *ctx); /* r = sqrt(a) mod p */
610 int BN_GF2m_mod_solve_quad_arr(BIGNUM *r, const BIGNUM *a,
611 const unsigned int p[], BN_CTX *ctx); /* r^2 + r = a mod p */
612 int BN_GF2m_poly2arr(const BIGNUM *a, unsigned int p[], int max);
613 int BN_GF2m_arr2poly(const unsigned int p[], BIGNUM *a);
615 /* faster mod functions for the 'NIST primes'
617 int BN_nist_mod_192(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
618 int BN_nist_mod_224(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
619 int BN_nist_mod_256(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
620 int BN_nist_mod_384(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
621 int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx);
623 const BIGNUM *BN_get0_nist_prime_192(void);
624 const BIGNUM *BN_get0_nist_prime_224(void);
625 const BIGNUM *BN_get0_nist_prime_256(void);
626 const BIGNUM *BN_get0_nist_prime_384(void);
627 const BIGNUM *BN_get0_nist_prime_521(void);
629 /* library internal functions */
631 #define bn_expand(a,bits) ((((((bits+BN_BITS2-1))/BN_BITS2)) <= (a)->dmax)?\
632 (a):bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2))
633 #define bn_wexpand(a,words) (((words) <= (a)->dmax)?(a):bn_expand2((a),(words)))
634 BIGNUM *bn_expand2(BIGNUM *a, int words);
635 #ifndef OPENSSL_NO_DEPRECATED
636 BIGNUM *bn_dup_expand(const BIGNUM *a, int words); /* unused */
639 /* Bignum consistency macros
640 * There is one "API" macro, bn_fix_top(), for stripping leading zeroes from
641 * bignum data after direct manipulations on the data. There is also an
642 * "internal" macro, bn_check_top(), for verifying that there are no leading
643 * zeroes. Unfortunately, some auditing is required due to the fact that
644 * bn_fix_top() has become an overabused duct-tape because bignum data is
645 * occasionally passed around in an inconsistent state. So the following
646 * changes have been made to sort this out;
647 * - bn_fix_top()s implementation has been moved to bn_correct_top()
648 * - if BN_DEBUG isn't defined, bn_fix_top() maps to bn_correct_top(), and
649 * bn_check_top() is as before.
650 * - if BN_DEBUG *is* defined;
651 * - bn_check_top() tries to pollute unused words even if the bignum 'top' is
652 * consistent. (ed: only if BN_DEBUG_RAND is defined)
653 * - bn_fix_top() maps to bn_check_top() rather than "fixing" anything.
654 * The idea is to have debug builds flag up inconsistent bignums when they
655 * occur. If that occurs in a bn_fix_top(), we examine the code in question; if
656 * the use of bn_fix_top() was appropriate (ie. it follows directly after code
657 * that manipulates the bignum) it is converted to bn_correct_top(), and if it
658 * was not appropriate, we convert it permanently to bn_check_top() and track
659 * down the cause of the bug. Eventually, no internal code should be using the
660 * bn_fix_top() macro. External applications and libraries should try this with
661 * their own code too, both in terms of building against the openssl headers
662 * with BN_DEBUG defined *and* linking with a version of OpenSSL built with it
663 * defined. This not only improves external code, it provides more test
664 * coverage for openssl's own code.
669 /* We only need assert() when debugging */
673 /* To avoid "make update" cvs wars due to BN_DEBUG, use some tricks */
674 #ifndef RAND_pseudo_bytes
675 int RAND_pseudo_bytes(unsigned char *buf,int num);
676 #define BN_DEBUG_TRIX
678 #define bn_pollute(a) \
680 const BIGNUM *_bnum1 = (a); \
681 if(_bnum1->top < _bnum1->dmax) { \
682 unsigned char _tmp_char; \
683 /* We cast away const without the compiler knowing, any \
684 * *genuinely* constant variables that aren't mutable \
685 * wouldn't be constructed with top!=dmax. */ \
686 BN_ULONG *_not_const; \
687 memcpy(&_not_const, &_bnum1->d, sizeof(BN_ULONG*)); \
688 RAND_pseudo_bytes(&_tmp_char, 1); \
689 memset((unsigned char *)(_not_const + _bnum1->top), _tmp_char, \
690 (_bnum1->dmax - _bnum1->top) * sizeof(BN_ULONG)); \
694 #undef RAND_pseudo_bytes
697 #define bn_pollute(a)
699 #define bn_check_top(a) \
701 const BIGNUM *_bnum2 = (a); \
702 if (_bnum2 != NULL) { \
703 assert((_bnum2->top == 0) || \
704 (_bnum2->d[_bnum2->top - 1] != 0)); \
705 bn_pollute(_bnum2); \
709 #define bn_fix_top(a) bn_check_top(a)
711 #else /* !BN_DEBUG */
713 #define bn_pollute(a)
714 #define bn_check_top(a)
715 #define bn_fix_top(a) bn_correct_top(a)
719 #define bn_correct_top(a) \
724 for (ftl= &((a)->d[(a)->top-1]); (a)->top > 0; (a)->top--) \
725 if (*(ftl--)) break; \
730 BN_ULONG bn_mul_add_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w);
731 BN_ULONG bn_mul_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w);
732 void bn_sqr_words(BN_ULONG *rp, const BN_ULONG *ap, int num);
733 BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d);
734 BN_ULONG bn_add_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int num);
735 BN_ULONG bn_sub_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int num);
737 /* Primes from RFC 2409 */
738 int get_rfc2409_prime_768(BIGNUM **bn);
739 int get_rfc2409_prime_1024(BIGNUM **bn);
741 /* Primes from RFC 3526 */
742 int get_rfc3526_prime_1536(BIGNUM **bn);
743 int get_rfc3526_prime_2048(BIGNUM **bn);
744 int get_rfc3526_prime_3072(BIGNUM **bn);
745 int get_rfc3526_prime_4096(BIGNUM **bn);
746 int get_rfc3526_prime_6144(BIGNUM **bn);
747 int get_rfc3526_prime_8192(BIGNUM **bn);
749 int BN_bntest_rand(BIGNUM *rnd, int bits, int top,int bottom);
751 /* BEGIN ERROR CODES */
752 /* The following lines are auto generated by the script mkerr.pl. Any changes
753 * made after this point may be overwritten when the script is next run.
755 void ERR_load_BN_strings(void);
757 /* Error codes for the BN functions. */
759 /* Function codes. */
760 #define BN_F_BNRAND 127
761 #define BN_F_BN_BLINDING_CONVERT_EX 100
762 #define BN_F_BN_BLINDING_CREATE_PARAM 128
763 #define BN_F_BN_BLINDING_INVERT_EX 101
764 #define BN_F_BN_BLINDING_NEW 102
765 #define BN_F_BN_BLINDING_UPDATE 103
766 #define BN_F_BN_BN2DEC 104
767 #define BN_F_BN_BN2HEX 105
768 #define BN_F_BN_CTX_GET 116
769 #define BN_F_BN_CTX_NEW 106
770 #define BN_F_BN_CTX_START 129
771 #define BN_F_BN_DIV 107
772 #define BN_F_BN_DIV_RECP 130
773 #define BN_F_BN_EXP 123
774 #define BN_F_BN_EXPAND2 108
775 #define BN_F_BN_EXPAND_INTERNAL 120
776 #define BN_F_BN_GF2M_MOD 131
777 #define BN_F_BN_GF2M_MOD_EXP 132
778 #define BN_F_BN_GF2M_MOD_MUL 133
779 #define BN_F_BN_GF2M_MOD_SOLVE_QUAD 134
780 #define BN_F_BN_GF2M_MOD_SOLVE_QUAD_ARR 135
781 #define BN_F_BN_GF2M_MOD_SQR 136
782 #define BN_F_BN_GF2M_MOD_SQRT 137
783 #define BN_F_BN_MOD_EXP2_MONT 118
784 #define BN_F_BN_MOD_EXP_MONT 109
785 #define BN_F_BN_MOD_EXP_MONT_CONSTTIME 124
786 #define BN_F_BN_MOD_EXP_MONT_WORD 117
787 #define BN_F_BN_MOD_EXP_RECP 125
788 #define BN_F_BN_MOD_EXP_SIMPLE 126
789 #define BN_F_BN_MOD_INVERSE 110
790 #define BN_F_BN_MOD_LSHIFT_QUICK 119
791 #define BN_F_BN_MOD_MUL_RECIPROCAL 111
792 #define BN_F_BN_MOD_SQRT 121
793 #define BN_F_BN_MPI2BN 112
794 #define BN_F_BN_NEW 113
795 #define BN_F_BN_RAND 114
796 #define BN_F_BN_RAND_RANGE 122
797 #define BN_F_BN_USUB 115
800 #define BN_R_ARG2_LT_ARG3 100
801 #define BN_R_BAD_RECIPROCAL 101
802 #define BN_R_BIGNUM_TOO_LONG 114
803 #define BN_R_CALLED_WITH_EVEN_MODULUS 102
804 #define BN_R_DIV_BY_ZERO 103
805 #define BN_R_ENCODING_ERROR 104
806 #define BN_R_EXPAND_ON_STATIC_BIGNUM_DATA 105
807 #define BN_R_INPUT_NOT_REDUCED 110
808 #define BN_R_INVALID_LENGTH 106
809 #define BN_R_INVALID_RANGE 115
810 #define BN_R_NOT_A_SQUARE 111
811 #define BN_R_NOT_INITIALIZED 107
812 #define BN_R_NO_INVERSE 108
813 #define BN_R_NO_SOLUTION 116
814 #define BN_R_P_IS_NOT_PRIME 112
815 #define BN_R_TOO_MANY_ITERATIONS 113
816 #define BN_R_TOO_MANY_TEMPORARY_VARIABLES 109