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1/* crypto/bn/bn.h */
2/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59#ifndef HEADER_BN_H
60#define HEADER_BN_H
61
62#include <openssl/e_os2.h>
63#ifndef OPENSSL_NO_FP_API
64#include <stdio.h> /* FILE */
65#endif
66
67#ifdef __cplusplus
68extern "C" {
69#endif
70
71#ifdef OPENSSL_SYS_VMS
72#undef BN_LLONG /* experimental, so far... */
73#endif
74
75#define BN_MUL_COMBA
76#define BN_SQR_COMBA
77#define BN_RECURSION
78
79/* This next option uses the C libraries (2 word)/(1 word) function.
80 * If it is not defined, I use my C version (which is slower).
81 * The reason for this flag is that when the particular C compiler
82 * library routine is used, and the library is linked with a different
83 * compiler, the library is missing. This mostly happens when the
84 * library is built with gcc and then linked using normal cc. This would
85 * be a common occurrence because gcc normally produces code that is
86 * 2 times faster than system compilers for the big number stuff.
87 * For machines with only one compiler (or shared libraries), this should
88 * be on. Again this in only really a problem on machines
89 * using "long long's", are 32bit, and are not using my assembler code. */
90#if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || \
91 defined(OPENSSL_SYS_WIN32) || defined(linux)
92# ifndef BN_DIV2W
93# define BN_DIV2W
94# endif
95#endif
96
97/* assuming long is 64bit - this is the DEC Alpha
98 * unsigned long long is only 64 bits :-(, don't define
99 * BN_LLONG for the DEC Alpha */
100#ifdef SIXTY_FOUR_BIT_LONG
101#define BN_ULLONG unsigned long long
102#define BN_ULONG unsigned long
103#define BN_LONG long
104#define BN_BITS 128
105#define BN_BYTES 8
106#define BN_BITS2 64
107#define BN_BITS4 32
108#define BN_MASK (0xffffffffffffffffffffffffffffffffLL)
109#define BN_MASK2 (0xffffffffffffffffL)
110#define BN_MASK2l (0xffffffffL)
111#define BN_MASK2h (0xffffffff00000000L)
112#define BN_MASK2h1 (0xffffffff80000000L)
113#define BN_TBIT (0x8000000000000000L)
114#define BN_DEC_CONV (10000000000000000000UL)
115#define BN_DEC_FMT1 "%lu"
116#define BN_DEC_FMT2 "%019lu"
117#define BN_DEC_NUM 19
118#endif
119
120/* This is where the long long data type is 64 bits, but long is 32.
121 * For machines where there are 64bit registers, this is the mode to use.
122 * IRIX, on R4000 and above should use this mode, along with the relevant
123 * assembler code :-). Do NOT define BN_LLONG.
124 */
125#ifdef SIXTY_FOUR_BIT
126#undef BN_LLONG
127#undef BN_ULLONG
128#define BN_ULONG unsigned long long
129#define BN_LONG long long
130#define BN_BITS 128
131#define BN_BYTES 8
132#define BN_BITS2 64
133#define BN_BITS4 32
134#define BN_MASK2 (0xffffffffffffffffLL)
135#define BN_MASK2l (0xffffffffL)
136#define BN_MASK2h (0xffffffff00000000LL)
137#define BN_MASK2h1 (0xffffffff80000000LL)
138#define BN_TBIT (0x8000000000000000LL)
139#define BN_DEC_CONV (10000000000000000000ULL)
140#define BN_DEC_FMT1 "%llu"
141#define BN_DEC_FMT2 "%019llu"
142#define BN_DEC_NUM 19
143#endif
144
145#ifdef THIRTY_TWO_BIT
146#if defined(OPENSSL_SYS_WIN32) && !defined(__GNUC__)
147#define BN_ULLONG unsigned _int64
148#else
149#define BN_ULLONG unsigned long long
150#endif
151#define BN_ULONG unsigned long
152#define BN_LONG long
153#define BN_BITS 64
154#define BN_BYTES 4
155#define BN_BITS2 32
156#define BN_BITS4 16
157#ifdef OPENSSL_SYS_WIN32
158/* VC++ doesn't like the LL suffix */
159#define BN_MASK (0xffffffffffffffffL)
160#else
161#define BN_MASK (0xffffffffffffffffLL)
162#endif
163#define BN_MASK2 (0xffffffffL)
164#define BN_MASK2l (0xffff)
165#define BN_MASK2h1 (0xffff8000L)
166#define BN_MASK2h (0xffff0000L)
167#define BN_TBIT (0x80000000L)
168#define BN_DEC_CONV (1000000000L)
169#define BN_DEC_FMT1 "%lu"
170#define BN_DEC_FMT2 "%09lu"
171#define BN_DEC_NUM 9
172#endif
173
174#ifdef SIXTEEN_BIT
175#ifndef BN_DIV2W
176#define BN_DIV2W
177#endif
178#define BN_ULLONG unsigned long
179#define BN_ULONG unsigned short
180#define BN_LONG short
181#define BN_BITS 32
182#define BN_BYTES 2
183#define BN_BITS2 16
184#define BN_BITS4 8
185#define BN_MASK (0xffffffff)
186#define BN_MASK2 (0xffff)
187#define BN_MASK2l (0xff)
188#define BN_MASK2h1 (0xff80)
189#define BN_MASK2h (0xff00)
190#define BN_TBIT (0x8000)
191#define BN_DEC_CONV (100000)
192#define BN_DEC_FMT1 "%u"
193#define BN_DEC_FMT2 "%05u"
194#define BN_DEC_NUM 5
195#endif
196
197#ifdef EIGHT_BIT
198#ifndef BN_DIV2W
199#define BN_DIV2W
200#endif
201#define BN_ULLONG unsigned short
202#define BN_ULONG unsigned char
203#define BN_LONG char
204#define BN_BITS 16
205#define BN_BYTES 1
206#define BN_BITS2 8
207#define BN_BITS4 4
208#define BN_MASK (0xffff)
209#define BN_MASK2 (0xff)
210#define BN_MASK2l (0xf)
211#define BN_MASK2h1 (0xf8)
212#define BN_MASK2h (0xf0)
213#define BN_TBIT (0x80)
214#define BN_DEC_CONV (100)
215#define BN_DEC_FMT1 "%u"
216#define BN_DEC_FMT2 "%02u"
217#define BN_DEC_NUM 2
218#endif
219
220#define BN_DEFAULT_BITS 1280
221
222#ifdef BIGNUM
223#undef BIGNUM
224#endif
225
226#define BN_FLG_MALLOCED 0x01
227#define BN_FLG_STATIC_DATA 0x02
228#define BN_FLG_FREE 0x8000 /* used for debuging */
229#define BN_set_flags(b,n) ((b)->flags|=(n))
230#define BN_get_flags(b,n) ((b)->flags&(n))
231
232typedef struct bignum_st
233 {
234 BN_ULONG *d; /* Pointer to an array of 'BN_BITS2' bit chunks. */
235 int top; /* Index of last used d +1. */
236 /* The next are internal book keeping for bn_expand. */
237 int dmax; /* Size of the d array. */
238 int neg; /* one if the number is negative */
239 int flags;
240 } BIGNUM;
241
242/* Used for temp variables (declaration hidden in bn_lcl.h) */
243typedef struct bignum_ctx BN_CTX;
244
245typedef struct bn_blinding_st
246 {
247 int init;
248 BIGNUM *A;
249 BIGNUM *Ai;
250 BIGNUM *mod; /* just a reference */
251 unsigned long thread_id; /* added in OpenSSL 0.9.6j and 0.9.7b;
252 * used only by crypto/rsa/rsa_eay.c, rsa_lib.c */
253 } BN_BLINDING;
254
255/* Used for montgomery multiplication */
256typedef struct bn_mont_ctx_st
257 {
258 int ri; /* number of bits in R */
259 BIGNUM RR; /* used to convert to montgomery form */
260 BIGNUM N; /* The modulus */
261 BIGNUM Ni; /* R*(1/R mod N) - N*Ni = 1
262 * (Ni is only stored for bignum algorithm) */
263 BN_ULONG n0; /* least significant word of Ni */
264 int flags;
265 } BN_MONT_CTX;
266
267/* Used for reciprocal division/mod functions
268 * It cannot be shared between threads
269 */
270typedef struct bn_recp_ctx_st
271 {
272 BIGNUM N; /* the divisor */
273 BIGNUM Nr; /* the reciprocal */
274 int num_bits;
275 int shift;
276 int flags;
277 } BN_RECP_CTX;
278
279#define BN_prime_checks 0 /* default: select number of iterations
280 based on the size of the number */
281
282/* number of Miller-Rabin iterations for an error rate of less than 2^-80
283 * for random 'b'-bit input, b >= 100 (taken from table 4.4 in the Handbook
284 * of Applied Cryptography [Menezes, van Oorschot, Vanstone; CRC Press 1996];
285 * original paper: Damgaard, Landrock, Pomerance: Average case error estimates
286 * for the strong probable prime test. -- Math. Comp. 61 (1993) 177-194) */
287#define BN_prime_checks_for_size(b) ((b) >= 1300 ? 2 : \
288 (b) >= 850 ? 3 : \
289 (b) >= 650 ? 4 : \
290 (b) >= 550 ? 5 : \
291 (b) >= 450 ? 6 : \
292 (b) >= 400 ? 7 : \
293 (b) >= 350 ? 8 : \
294 (b) >= 300 ? 9 : \
295 (b) >= 250 ? 12 : \
296 (b) >= 200 ? 15 : \
297 (b) >= 150 ? 18 : \
298 /* b >= 100 */ 27)
299
300#define BN_num_bytes(a) ((BN_num_bits(a)+7)/8)
301
302/* Note that BN_abs_is_word does not work reliably for w == 0 */
303#define BN_abs_is_word(a,w) (((a)->top == 1) && ((a)->d[0] == (BN_ULONG)(w)))
304#define BN_is_zero(a) (((a)->top == 0) || BN_abs_is_word(a,0))
305#define BN_is_one(a) (BN_abs_is_word((a),1) && !(a)->neg)
306#define BN_is_word(a,w) ((w) ? BN_abs_is_word((a),(w)) && !(a)->neg : \
307 BN_is_zero((a)))
308#define BN_is_odd(a) (((a)->top > 0) && ((a)->d[0] & 1))
309
310#define BN_one(a) (BN_set_word((a),1))
311#define BN_zero(a) (BN_set_word((a),0))
312
313/*#define BN_ascii2bn(a) BN_hex2bn(a) */
314/*#define BN_bn2ascii(a) BN_bn2hex(a) */
315
316const BIGNUM *BN_value_one(void);
317char * BN_options(void);
318BN_CTX *BN_CTX_new(void);
319void BN_CTX_init(BN_CTX *c);
320void BN_CTX_free(BN_CTX *c);
321void BN_CTX_start(BN_CTX *ctx);
322BIGNUM *BN_CTX_get(BN_CTX *ctx);
323void BN_CTX_end(BN_CTX *ctx);
324int BN_rand(BIGNUM *rnd, int bits, int top,int bottom);
325int BN_pseudo_rand(BIGNUM *rnd, int bits, int top,int bottom);
326int BN_rand_range(BIGNUM *rnd, BIGNUM *range);
327int BN_pseudo_rand_range(BIGNUM *rnd, BIGNUM *range);
328int BN_num_bits(const BIGNUM *a);
329int BN_num_bits_word(BN_ULONG);
330BIGNUM *BN_new(void);
331void BN_init(BIGNUM *);
332void BN_clear_free(BIGNUM *a);
333BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b);
334void BN_swap(BIGNUM *a, BIGNUM *b);
335BIGNUM *BN_bin2bn(const unsigned char *s,int len,BIGNUM *ret);
336int BN_bn2bin(const BIGNUM *a, unsigned char *to);
337BIGNUM *BN_mpi2bn(const unsigned char *s,int len,BIGNUM *ret);
338int BN_bn2mpi(const BIGNUM *a, unsigned char *to);
339int BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
340int BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
341int BN_uadd(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
342int BN_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
343int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
344int BN_sqr(BIGNUM *r, const BIGNUM *a,BN_CTX *ctx);
345
346int BN_div(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m, const BIGNUM *d,
347 BN_CTX *ctx);
348#define BN_mod(rem,m,d,ctx) BN_div(NULL,(rem),(m),(d),(ctx))
349int BN_nnmod(BIGNUM *r, const BIGNUM *m, const BIGNUM *d, BN_CTX *ctx);
350int BN_mod_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m, BN_CTX *ctx);
351int BN_mod_add_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m);
352int BN_mod_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m, BN_CTX *ctx);
353int BN_mod_sub_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m);
354int BN_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
355 const BIGNUM *m, BN_CTX *ctx);
356int BN_mod_sqr(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);
357int BN_mod_lshift1(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);
358int BN_mod_lshift1_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *m);
359int BN_mod_lshift(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m, BN_CTX *ctx);
360int BN_mod_lshift_quick(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m);
361
362BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w);
363BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w);
364int BN_mul_word(BIGNUM *a, BN_ULONG w);
365int BN_add_word(BIGNUM *a, BN_ULONG w);
366int BN_sub_word(BIGNUM *a, BN_ULONG w);
367int BN_set_word(BIGNUM *a, BN_ULONG w);
368BN_ULONG BN_get_word(const BIGNUM *a);
369
370int BN_cmp(const BIGNUM *a, const BIGNUM *b);
371void BN_free(BIGNUM *a);
372int BN_is_bit_set(const BIGNUM *a, int n);
373int BN_lshift(BIGNUM *r, const BIGNUM *a, int n);
374int BN_lshift1(BIGNUM *r, const BIGNUM *a);
375int BN_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,BN_CTX *ctx);
376
377int BN_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
378 const BIGNUM *m,BN_CTX *ctx);
379int BN_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
380 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
381int BN_mod_exp_mont_word(BIGNUM *r, BN_ULONG a, const BIGNUM *p,
382 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
383int BN_mod_exp2_mont(BIGNUM *r, const BIGNUM *a1, const BIGNUM *p1,
384 const BIGNUM *a2, const BIGNUM *p2,const BIGNUM *m,
385 BN_CTX *ctx,BN_MONT_CTX *m_ctx);
386int BN_mod_exp_simple(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
387 const BIGNUM *m,BN_CTX *ctx);
388
389int BN_mask_bits(BIGNUM *a,int n);
390#ifndef OPENSSL_NO_FP_API
391int BN_print_fp(FILE *fp, const BIGNUM *a);
392#endif
393#ifdef HEADER_BIO_H
394int BN_print(BIO *fp, const BIGNUM *a);
395#else
396int BN_print(void *fp, const BIGNUM *a);
397#endif
398int BN_reciprocal(BIGNUM *r, const BIGNUM *m, int len, BN_CTX *ctx);
399int BN_rshift(BIGNUM *r, const BIGNUM *a, int n);
400int BN_rshift1(BIGNUM *r, const BIGNUM *a);
401void BN_clear(BIGNUM *a);
402BIGNUM *BN_dup(const BIGNUM *a);
403int BN_ucmp(const BIGNUM *a, const BIGNUM *b);
404int BN_set_bit(BIGNUM *a, int n);
405int BN_clear_bit(BIGNUM *a, int n);
406char * BN_bn2hex(const BIGNUM *a);
407char * BN_bn2dec(const BIGNUM *a);
408int BN_hex2bn(BIGNUM **a, const char *str);
409int BN_dec2bn(BIGNUM **a, const char *str);
410int BN_gcd(BIGNUM *r,const BIGNUM *a,const BIGNUM *b,BN_CTX *ctx);
411int BN_kronecker(const BIGNUM *a,const BIGNUM *b,BN_CTX *ctx); /* returns -2 for error */
412BIGNUM *BN_mod_inverse(BIGNUM *ret,
413 const BIGNUM *a, const BIGNUM *n,BN_CTX *ctx);
414BIGNUM *BN_mod_sqrt(BIGNUM *ret,
415 const BIGNUM *a, const BIGNUM *n,BN_CTX *ctx);
416BIGNUM *BN_generate_prime(BIGNUM *ret,int bits,int safe,
417 const BIGNUM *add, const BIGNUM *rem,
418 void (*callback)(int,int,void *),void *cb_arg);
419int BN_is_prime(const BIGNUM *p,int nchecks,
420 void (*callback)(int,int,void *),
421 BN_CTX *ctx,void *cb_arg);
422int BN_is_prime_fasttest(const BIGNUM *p,int nchecks,
423 void (*callback)(int,int,void *),BN_CTX *ctx,void *cb_arg,
424 int do_trial_division);
425
426BN_MONT_CTX *BN_MONT_CTX_new(void );
427void BN_MONT_CTX_init(BN_MONT_CTX *ctx);
428int BN_mod_mul_montgomery(BIGNUM *r,const BIGNUM *a,const BIGNUM *b,
429 BN_MONT_CTX *mont, BN_CTX *ctx);
430#define BN_to_montgomery(r,a,mont,ctx) BN_mod_mul_montgomery(\
431 (r),(a),&((mont)->RR),(mont),(ctx))
432int BN_from_montgomery(BIGNUM *r,const BIGNUM *a,
433 BN_MONT_CTX *mont, BN_CTX *ctx);
434void BN_MONT_CTX_free(BN_MONT_CTX *mont);
435int BN_MONT_CTX_set(BN_MONT_CTX *mont,const BIGNUM *mod,BN_CTX *ctx);
436BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to,BN_MONT_CTX *from);
437
438BN_BLINDING *BN_BLINDING_new(BIGNUM *A,BIGNUM *Ai,BIGNUM *mod);
439void BN_BLINDING_free(BN_BLINDING *b);
440int BN_BLINDING_update(BN_BLINDING *b,BN_CTX *ctx);
441int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *r, BN_CTX *ctx);
442int BN_BLINDING_invert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
443
444void BN_set_params(int mul,int high,int low,int mont);
445int BN_get_params(int which); /* 0, mul, 1 high, 2 low, 3 mont */
446
447void BN_RECP_CTX_init(BN_RECP_CTX *recp);
448BN_RECP_CTX *BN_RECP_CTX_new(void);
449void BN_RECP_CTX_free(BN_RECP_CTX *recp);
450int BN_RECP_CTX_set(BN_RECP_CTX *recp,const BIGNUM *rdiv,BN_CTX *ctx);
451int BN_mod_mul_reciprocal(BIGNUM *r, const BIGNUM *x, const BIGNUM *y,
452 BN_RECP_CTX *recp,BN_CTX *ctx);
453int BN_mod_exp_recp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
454 const BIGNUM *m, BN_CTX *ctx);
455int BN_div_recp(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m,
456 BN_RECP_CTX *recp, BN_CTX *ctx);
457
458/* library internal functions */
459
460#define bn_expand(a,bits) ((((((bits+BN_BITS2-1))/BN_BITS2)) <= (a)->dmax)?\
461 (a):bn_expand2((a),(bits)/BN_BITS2+1))
462#define bn_wexpand(a,words) (((words) <= (a)->dmax)?(a):bn_expand2((a),(words)))
463BIGNUM *bn_expand2(BIGNUM *a, int words);
464BIGNUM *bn_dup_expand(const BIGNUM *a, int words);
465
466#define bn_fix_top(a) \
467 { \
468 BN_ULONG *ftl; \
469 if ((a)->top > 0) \
470 { \
471 for (ftl= &((a)->d[(a)->top-1]); (a)->top > 0; (a)->top--) \
472 if (*(ftl--)) break; \
473 } \
474 }
475
476BN_ULONG bn_mul_add_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w);
477BN_ULONG bn_mul_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w);
478void bn_sqr_words(BN_ULONG *rp, const BN_ULONG *ap, int num);
479BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d);
480BN_ULONG bn_add_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int num);
481BN_ULONG bn_sub_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int num);
482
483#ifdef BN_DEBUG
484void bn_dump1(FILE *o, const char *a, const BN_ULONG *b,int n);
485# define bn_print(a) {fprintf(stderr, #a "="); BN_print_fp(stderr,a); \
486 fprintf(stderr,"\n");}
487# define bn_dump(a,n) bn_dump1(stderr,#a,a,n);
488#else
489# define bn_print(a)
490# define bn_dump(a,b)
491#endif
492
493int BN_bntest_rand(BIGNUM *rnd, int bits, int top,int bottom);
494
495/* BEGIN ERROR CODES */
496/* The following lines are auto generated by the script mkerr.pl. Any changes
497 * made after this point may be overwritten when the script is next run.
498 */
499void ERR_load_BN_strings(void);
500
501/* Error codes for the BN functions. */
502
503/* Function codes. */
504#define BN_F_BN_BLINDING_CONVERT 100
505#define BN_F_BN_BLINDING_INVERT 101
506#define BN_F_BN_BLINDING_NEW 102
507#define BN_F_BN_BLINDING_UPDATE 103
508#define BN_F_BN_BN2DEC 104
509#define BN_F_BN_BN2HEX 105
510#define BN_F_BN_CTX_GET 116
511#define BN_F_BN_CTX_NEW 106
512#define BN_F_BN_DIV 107
513#define BN_F_BN_EXPAND2 108
514#define BN_F_BN_EXPAND_INTERNAL 120
515#define BN_F_BN_MOD_EXP2_MONT 118
516#define BN_F_BN_MOD_EXP_MONT 109
517#define BN_F_BN_MOD_EXP_MONT_WORD 117
518#define BN_F_BN_MOD_INVERSE 110
519#define BN_F_BN_MOD_LSHIFT_QUICK 119
520#define BN_F_BN_MOD_MUL_RECIPROCAL 111
521#define BN_F_BN_MOD_SQRT 121
522#define BN_F_BN_MPI2BN 112
523#define BN_F_BN_NEW 113
524#define BN_F_BN_RAND 114
525#define BN_F_BN_RAND_RANGE 122
526#define BN_F_BN_USUB 115
527
528/* Reason codes. */
529#define BN_R_ARG2_LT_ARG3 100
530#define BN_R_BAD_RECIPROCAL 101
531#define BN_R_BIGNUM_TOO_LONG 114
532#define BN_R_CALLED_WITH_EVEN_MODULUS 102
533#define BN_R_DIV_BY_ZERO 103
534#define BN_R_ENCODING_ERROR 104
535#define BN_R_EXPAND_ON_STATIC_BIGNUM_DATA 105
536#define BN_R_INPUT_NOT_REDUCED 110
537#define BN_R_INVALID_LENGTH 106
538#define BN_R_INVALID_RANGE 115
539#define BN_R_NOT_A_SQUARE 111
540#define BN_R_NOT_INITIALIZED 107
541#define BN_R_NO_INVERSE 108
542#define BN_R_P_IS_NOT_PRIME 112
543#define BN_R_TOO_MANY_ITERATIONS 113
544#define BN_R_TOO_MANY_TEMPORARY_VARIABLES 109
545
546#ifdef __cplusplus
547}
548#endif
549#endif
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