crypto/bn/bntest.c

   1 /* crypto/bn/bntest.c */
   2 /* Copyright (C) 1995-1998 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 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62
  63 #include "openssl/e_os.h"
  64
  65 #include <openssl/bio.h>
  66 #include <openssl/bn.h>
  67 #include <openssl/rand.h>
  68 #include <openssl/x509.h>
  69 #include <openssl/err.h>
  70
  71 #ifdef WINDOWS
  72 #include "../bio/bss_file.c"
  73 #endif
  74
  75 const int num0 = 100; /* number of tests */
  76 const int num1 = 50;  /* additional tests for some functions */
  77 const int num2 = 5;   /* number of tests for slow functions */
  78
  79 int test_add(BIO *bp);
  80 int test_sub(BIO *bp);
  81 int test_lshift1(BIO *bp);
  82 int test_lshift(BIO *bp,BN_CTX *ctx,BIGNUM *a_);
  83 int test_rshift1(BIO *bp);
  84 int test_rshift(BIO *bp,BN_CTX *ctx);
  85 int test_div(BIO *bp,BN_CTX *ctx);
  86 int test_div_recp(BIO *bp,BN_CTX *ctx);
  87 int test_mul(BIO *bp);
  88 int test_sqr(BIO *bp,BN_CTX *ctx);
  89 int test_mont(BIO *bp,BN_CTX *ctx);
  90 int test_mod(BIO *bp,BN_CTX *ctx);
  91 int test_mod_mul(BIO *bp,BN_CTX *ctx);
  92 int test_mod_exp(BIO *bp,BN_CTX *ctx);
  93 int test_exp(BIO *bp,BN_CTX *ctx);
  94 int test_kron(BIO *bp,BN_CTX *ctx);
  95 int test_sqrt(BIO *bp,BN_CTX *ctx);
  96 int rand_neg(void);
  97 static int results=0;
  98
  99 #ifdef NO_STDIO
 100 #define APPS_WIN16
 101 #include "bss_file.c"
 102 #endif
 103
 104 static unsigned char lst[]="\xC6\x4F\x43\x04\x2A\xEA\xCA\x6E\x58\x36\x80\x5B\xE8\xC9"
 105 "\x9B\x04\x5D\x48\x36\xC2\xFD\x16\xC9\x64\xF0";
 106
 107 static const char rnd_seed[] = "string to make the random number generator think it has entropy";
 108
 109 static void message(BIO *out, char *m)
 110         {
 111         fprintf(stderr, "test %s\n", m);
 112 #if defined(linux) || defined(__FreeBSD__) /* can we use GNU bc features? */
 113         BIO_puts(out, "print \"test ");
 114         BIO_puts(out, m);
 115         BIO_puts(out, "\\n\"\n");
 116 #endif
 117         }
 118
 119 int main(int argc, char *argv[])
 120         {
 121         BN_CTX *ctx;
 122         BIO *out;
 123         char *outfile=NULL;
 124
 125         results = 0;
 126
 127         RAND_seed(rnd_seed, sizeof rnd_seed); /* or BN_rand may fail, and we don't
 128                                                * even check its return value
 129                                                * (which we should) */
 130
 131         argc--;
 132         argv++;
 133         while (argc >= 1)
 134                 {
 135                 if (strcmp(*argv,"-results") == 0)
 136                         results=1;
 137                 else if (strcmp(*argv,"-out") == 0)
 138                         {
 139                         if (--argc < 1) break;
 140                         outfile= *(++argv);
 141                         }
 142                 argc--;
 143                 argv++;
 144                 }
 145
 146
 147         ctx=BN_CTX_new();
 148         if (ctx == NULL) exit(1);
 149
 150         out=BIO_new(BIO_s_file());
 151         if (out == NULL) exit(1);
 152         if (outfile == NULL)
 153                 {
 154                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 155                 }
 156         else
 157                 {
 158                 if (!BIO_write_filename(out,outfile))
 159                         {
 160                         perror(outfile);
 161                         exit(1);
 162                         }
 163                 }
 164
 165         if (!results)
 166                 BIO_puts(out,"obase=16\nibase=16\n");
 167
 168 #if 0
 169         message(out,"BN_add");
 170         if (!test_add(out)) goto err;
 171         BIO_flush(out);
 172
 173         message(out,"BN_sub");
 174         if (!test_sub(out)) goto err;
 175         BIO_flush(out);
 176
 177         message(out,"BN_lshift1");
 178         if (!test_lshift1(out)) goto err;
 179         BIO_flush(out);
 180
 181         message(out,"BN_lshift (fixed)");
 182         if (!test_lshift(out,ctx,BN_bin2bn(lst,sizeof(lst)-1,NULL)))
 183             goto err;
 184         BIO_flush(out);
 185
 186         message(out,"BN_lshift");
 187         if (!test_lshift(out,ctx,NULL)) goto err;
 188         BIO_flush(out);
 189
 190         message(out,"BN_rshift1");
 191         if (!test_rshift1(out)) goto err;
 192         BIO_flush(out);
 193
 194         message(out,"BN_rshift");
 195         if (!test_rshift(out,ctx)) goto err;
 196         BIO_flush(out);
 197
 198         message(out,"BN_sqr");
 199         if (!test_sqr(out,ctx)) goto err;
 200         BIO_flush(out);
 201
 202         message(out,"BN_mul");
 203         if (!test_mul(out)) goto err;
 204         BIO_flush(out);
 205
 206         message(out,"BN_div");
 207         if (!test_div(out,ctx)) goto err;
 208         BIO_flush(out);
 209
 210         message(out,"BN_div_recp");
 211         if (!test_div_recp(out,ctx)) goto err;
 212         BIO_flush(out);
 213
 214         message(out,"BN_mod");
 215         if (!test_mod(out,ctx)) goto err;
 216         BIO_flush(out);
 217
 218         message(out,"BN_mod_mul");
 219         if (!test_mod_mul(out,ctx)) goto err;
 220         BIO_flush(out);
 221
 222         message(out,"BN_mont");
 223         if (!test_mont(out,ctx)) goto err;
 224         BIO_flush(out);
 225
 226         message(out,"BN_mod_exp");
 227         if (!test_mod_exp(out,ctx)) goto err;
 228         BIO_flush(out);
 229
 230         message(out,"BN_exp");
 231         if (!test_exp(out,ctx)) goto err;
 232         BIO_flush(out);
 233 #endif
 234
 235         message(out,"BN_kronecker");
 236         if (!test_kron(out,ctx)) goto err;
 237         BIO_flush(out);
 238
 239         message(out,"BN_mod_sqrt");
 240         if (!test_sqrt(out,ctx)) goto err;
 241         BIO_flush(out);
 242
 243         BN_CTX_free(ctx);
 244         BIO_free(out);
 245
 246 /**/
 247         exit(0);
 248 err:
 249         BIO_puts(out,"1\n"); /* make sure the Perl script fed by bc notices
 250                               * the failure, see test_bn in test/Makefile.ssl*/
 251         BIO_flush(out);
 252         ERR_load_crypto_strings();
 253         ERR_print_errors_fp(stderr);
 254         exit(1);
 255         return(1);
 256         }
 257
 258 int test_add(BIO *bp)
 259         {
 260         BIGNUM a,b,c;
 261         int i;
 262         int j;
 263
 264         BN_init(&a);
 265         BN_init(&b);
 266         BN_init(&c);
 267
 268         BN_rand(&a,512,0,0);
 269         for (i=0; i<num0; i++)
 270                 {
 271                 BN_rand(&b,450+i,0,0);
 272                 a.neg=rand_neg();
 273                 b.neg=rand_neg();
 274                 if (bp == NULL)
 275                         for (j=0; j<10000; j++)
 276                                 BN_add(&c,&a,&b);
 277                 BN_add(&c,&a,&b);
 278                 if (bp != NULL)
 279                         {
 280                         if (!results)
 281                                 {
 282                                 BN_print(bp,&a);
 283                                 BIO_puts(bp," + ");
 284                                 BN_print(bp,&b);
 285                                 BIO_puts(bp," - ");
 286                                 }
 287                         BN_print(bp,&c);
 288                         BIO_puts(bp,"\n");
 289                         }
 290                 a.neg=!a.neg;
 291                 b.neg=!b.neg;
 292                 BN_add(&c,&c,&b);
 293                 BN_add(&c,&c,&a);
 294                 if(!BN_is_zero(&c))
 295                     {
 296                     fprintf(stderr,"Add test failed!\n");
 297                     return 0;
 298                     }
 299                 }
 300         BN_free(&a);
 301         BN_free(&b);
 302         BN_free(&c);
 303         return(1);
 304         }
 305
 306 int test_sub(BIO *bp)
 307         {
 308         BIGNUM a,b,c;
 309         int i;
 310         int j;
 311
 312         BN_init(&a);
 313         BN_init(&b);
 314         BN_init(&c);
 315
 316         for (i=0; i<num0+num1; i++)
 317                 {
 318                 if (i < num1)
 319                         {
 320                         BN_rand(&a,512,0,0);
 321                         BN_copy(&b,&a);
 322                         if (BN_set_bit(&a,i)==0) return(0);
 323                         BN_add_word(&b,i);
 324                         }
 325                 else
 326                         {
 327                         BN_rand(&b,400+i-num1,0,0);
 328                         a.neg=rand_neg();
 329                         b.neg=rand_neg();
 330                         }
 331                 if (bp == NULL)
 332                         for (j=0; j<10000; j++)
 333                                 BN_sub(&c,&a,&b);
 334                 BN_sub(&c,&a,&b);
 335                 if (bp != NULL)
 336                         {
 337                         if (!results)
 338                                 {
 339                                 BN_print(bp,&a);
 340                                 BIO_puts(bp," - ");
 341                                 BN_print(bp,&b);
 342                                 BIO_puts(bp," - ");
 343                                 }
 344                         BN_print(bp,&c);
 345                         BIO_puts(bp,"\n");
 346                         }
 347                 BN_add(&c,&c,&b);
 348                 BN_sub(&c,&c,&a);
 349                 if(!BN_is_zero(&c))
 350                     {
 351                     fprintf(stderr,"Subtract test failed!\n");
 352                     return 0;
 353                     }
 354                 }
 355         BN_free(&a);
 356         BN_free(&b);
 357         BN_free(&c);
 358         return(1);
 359         }
 360
 361 int test_div(BIO *bp, BN_CTX *ctx)
 362         {
 363         BIGNUM a,b,c,d,e;
 364         int i;
 365         int j;
 366
 367         BN_init(&a);
 368         BN_init(&b);
 369         BN_init(&c);
 370         BN_init(&d);
 371         BN_init(&e);
 372
 373         for (i=0; i<num0+num1; i++)
 374                 {
 375                 if (i < num1)
 376                         {
 377                         BN_rand(&a,400,0,0);
 378                         BN_copy(&b,&a);
 379                         BN_lshift(&a,&a,i);
 380                         BN_add_word(&a,i);
 381                         }
 382                 else
 383                         BN_rand(&b,50+3*(i-num1),0,0);
 384                 a.neg=rand_neg();
 385                 b.neg=rand_neg();
 386                 if (bp == NULL)
 387                         for (j=0; j<100; j++)
 388                                 BN_div(&d,&c,&a,&b,ctx);
 389                 BN_div(&d,&c,&a,&b,ctx);
 390                 if (bp != NULL)
 391                         {
 392                         if (!results)
 393                                 {
 394                                 BN_print(bp,&a);
 395                                 BIO_puts(bp," / ");
 396                                 BN_print(bp,&b);
 397                                 BIO_puts(bp," - ");
 398                                 }
 399                         BN_print(bp,&d);
 400                         BIO_puts(bp,"\n");
 401
 402                         if (!results)
 403                                 {
 404                                 BN_print(bp,&a);
 405                                 BIO_puts(bp," % ");
 406                                 BN_print(bp,&b);
 407                                 BIO_puts(bp," - ");
 408                                 }
 409                         BN_print(bp,&c);
 410                         BIO_puts(bp,"\n");
 411                         }
 412                 BN_mul(&e,&d,&b,ctx);
 413                 BN_add(&d,&e,&c);
 414                 BN_sub(&d,&d,&a);
 415                 if(!BN_is_zero(&d))
 416                     {
 417                     fprintf(stderr,"Division test failed!\n");
 418                     return 0;
 419                     }
 420                 }
 421         BN_free(&a);
 422         BN_free(&b);
 423         BN_free(&c);
 424         BN_free(&d);
 425         BN_free(&e);
 426         return(1);
 427         }
 428
 429 int test_div_recp(BIO *bp, BN_CTX *ctx)
 430         {
 431         BIGNUM a,b,c,d,e;
 432         BN_RECP_CTX recp;
 433         int i;
 434         int j;
 435
 436         BN_RECP_CTX_init(&recp);
 437         BN_init(&a);
 438         BN_init(&b);
 439         BN_init(&c);
 440         BN_init(&d);
 441         BN_init(&e);
 442
 443         for (i=0; i<num0+num1; i++)
 444                 {
 445                 if (i < num1)
 446                         {
 447                         BN_rand(&a,400,0,0);
 448                         BN_copy(&b,&a);
 449                         BN_lshift(&a,&a,i);
 450                         BN_add_word(&a,i);
 451                         }
 452                 else
 453                         BN_rand(&b,50+3*(i-num1),0,0);
 454                 a.neg=rand_neg();
 455                 b.neg=rand_neg();
 456                 BN_RECP_CTX_set(&recp,&b,ctx);
 457                 if (bp == NULL)
 458                         for (j=0; j<100; j++)
 459                                 BN_div_recp(&d,&c,&a,&recp,ctx);
 460                 BN_div_recp(&d,&c,&a,&recp,ctx);
 461                 if (bp != NULL)
 462                         {
 463                         if (!results)
 464                                 {
 465                                 BN_print(bp,&a);
 466                                 BIO_puts(bp," / ");
 467                                 BN_print(bp,&b);
 468                                 BIO_puts(bp," - ");
 469                                 }
 470                         BN_print(bp,&d);
 471                         BIO_puts(bp,"\n");
 472
 473                         if (!results)
 474                                 {
 475                                 BN_print(bp,&a);
 476                                 BIO_puts(bp," % ");
 477                                 BN_print(bp,&b);
 478                                 BIO_puts(bp," - ");
 479                                 }
 480                         BN_print(bp,&c);
 481                         BIO_puts(bp,"\n");
 482                         }
 483                 BN_mul(&e,&d,&b,ctx);
 484                 BN_add(&d,&e,&c);
 485                 BN_sub(&d,&d,&a);
 486                 if(!BN_is_zero(&d))
 487                     {
 488                     fprintf(stderr,"Reciprocal division test failed!\n");
 489                     fprintf(stderr,"a=");
 490                     BN_print_fp(stderr,&a);
 491                     fprintf(stderr,"\nb=");
 492                     BN_print_fp(stderr,&b);
 493                     fprintf(stderr,"\n");
 494                     return 0;
 495                     }
 496                 }
 497         BN_free(&a);
 498         BN_free(&b);
 499         BN_free(&c);
 500         BN_free(&d);
 501         BN_free(&e);
 502         BN_RECP_CTX_free(&recp);
 503         return(1);
 504         }
 505
 506 int test_mul(BIO *bp)
 507         {
 508         BIGNUM a,b,c,d,e;
 509         int i;
 510         int j;
 511         BN_CTX ctx;
 512
 513         BN_CTX_init(&ctx);
 514         BN_init(&a);
 515         BN_init(&b);
 516         BN_init(&c);
 517         BN_init(&d);
 518         BN_init(&e);
 519
 520         for (i=0; i<num0+num1; i++)
 521                 {
 522                 if (i <= num1)
 523                         {
 524                         BN_rand(&a,100,0,0);
 525                         BN_rand(&b,100,0,0);
 526                         }
 527                 else
 528                         BN_rand(&b,i-num1,0,0);
 529                 a.neg=rand_neg();
 530                 b.neg=rand_neg();
 531                 if (bp == NULL)
 532                         for (j=0; j<100; j++)
 533                                 BN_mul(&c,&a,&b,&ctx);
 534                 BN_mul(&c,&a,&b,&ctx);
 535                 if (bp != NULL)
 536                         {
 537                         if (!results)
 538                                 {
 539                                 BN_print(bp,&a);
 540                                 BIO_puts(bp," * ");
 541                                 BN_print(bp,&b);
 542                                 BIO_puts(bp," - ");
 543                                 }
 544                         BN_print(bp,&c);
 545                         BIO_puts(bp,"\n");
 546                         }
 547                 BN_div(&d,&e,&c,&a,&ctx);
 548                 BN_sub(&d,&d,&b);
 549                 if(!BN_is_zero(&d) || !BN_is_zero(&e))
 550                     {
 551                     fprintf(stderr,"Multiplication test failed!\n");
 552                     return 0;
 553                     }
 554                 }
 555         BN_free(&a);
 556         BN_free(&b);
 557         BN_free(&c);
 558         BN_free(&d);
 559         BN_free(&e);
 560         BN_CTX_free(&ctx);
 561         return(1);
 562         }
 563
 564 int test_sqr(BIO *bp, BN_CTX *ctx)
 565         {
 566         BIGNUM a,c,d,e;
 567         int i;
 568         int j;
 569
 570         BN_init(&a);
 571         BN_init(&c);
 572         BN_init(&d);
 573         BN_init(&e);
 574
 575         for (i=0; i<num0; i++)
 576                 {
 577                 BN_rand(&a,40+i*10,0,0);
 578                 a.neg=rand_neg();
 579                 if (bp == NULL)
 580                         for (j=0; j<100; j++)
 581                                 BN_sqr(&c,&a,ctx);
 582                 BN_sqr(&c,&a,ctx);
 583                 if (bp != NULL)
 584                         {
 585                         if (!results)
 586                                 {
 587                                 BN_print(bp,&a);
 588                                 BIO_puts(bp," * ");
 589                                 BN_print(bp,&a);
 590                                 BIO_puts(bp," - ");
 591                                 }
 592                         BN_print(bp,&c);
 593                         BIO_puts(bp,"\n");
 594                         }
 595                 BN_div(&d,&e,&c,&a,ctx);
 596                 BN_sub(&d,&d,&a);
 597                 if(!BN_is_zero(&d) || !BN_is_zero(&e))
 598                     {
 599                     fprintf(stderr,"Square test failed!\n");
 600                     return 0;
 601                     }
 602                 }
 603         BN_free(&a);
 604         BN_free(&c);
 605         BN_free(&d);
 606         BN_free(&e);
 607         return(1);
 608         }
 609
 610 int test_mont(BIO *bp, BN_CTX *ctx)
 611         {
 612         BIGNUM a,b,c,d,A,B;
 613         BIGNUM n;
 614         int i;
 615         int j;
 616         BN_MONT_CTX *mont;
 617
 618         BN_init(&a);
 619         BN_init(&b);
 620         BN_init(&c);
 621         BN_init(&d);
 622         BN_init(&A);
 623         BN_init(&B);
 624         BN_init(&n);
 625
 626         mont=BN_MONT_CTX_new();
 627
 628         BN_rand(&a,100,0,0); /**/
 629         BN_rand(&b,100,0,0); /**/
 630         for (i=0; i<num2; i++)
 631                 {
 632                 int bits = (200*(i+1))/num2;
 633
 634                 if (bits == 0)
 635                         continue;
 636                 BN_rand(&n,bits,0,1);
 637                 BN_MONT_CTX_set(mont,&n,ctx);
 638
 639                 BN_nnmod(&a,&a,&n,ctx);
 640                 BN_nnmod(&b,&b,&n,ctx);
 641
 642                 BN_to_montgomery(&A,&a,mont,ctx);
 643                 BN_to_montgomery(&B,&b,mont,ctx);
 644
 645                 if (bp == NULL)
 646                         for (j=0; j<100; j++)
 647                                 BN_mod_mul_montgomery(&c,&A,&B,mont,ctx);/**/
 648                 BN_mod_mul_montgomery(&c,&A,&B,mont,ctx);/**/
 649                 BN_from_montgomery(&A,&c,mont,ctx);/**/
 650                 if (bp != NULL)
 651                         {
 652                         if (!results)
 653                                 {
 654 #ifdef undef
 655 fprintf(stderr,"%d * %d %% %d\n",
 656 BN_num_bits(&a),
 657 BN_num_bits(&b),
 658 BN_num_bits(mont->N));
 659 #endif
 660                                 BN_print(bp,&a);
 661                                 BIO_puts(bp," * ");
 662                                 BN_print(bp,&b);
 663                                 BIO_puts(bp," % ");
 664                                 BN_print(bp,&(mont->N));
 665                                 BIO_puts(bp," - ");
 666                                 }
 667                         BN_print(bp,&A);
 668                         BIO_puts(bp,"\n");
 669                         }
 670                 BN_mod_mul(&d,&a,&b,&n,ctx);
 671                 BN_sub(&d,&d,&A);
 672                 if(!BN_is_zero(&d))
 673                     {
 674                     fprintf(stderr,"Montgomery multiplication test failed!\n");
 675                     return 0;
 676                     }
 677                 }
 678         BN_MONT_CTX_free(mont);
 679         BN_free(&a);
 680         BN_free(&b);
 681         BN_free(&c);
 682         BN_free(&d);
 683         BN_free(&A);
 684         BN_free(&B);
 685         BN_free(&n);
 686         return(1);
 687         }
 688
 689 int test_mod(BIO *bp, BN_CTX *ctx)
 690         {
 691         BIGNUM *a,*b,*c,*d,*e;
 692         int i;
 693         int j;
 694
 695         a=BN_new();
 696         b=BN_new();
 697         c=BN_new();
 698         d=BN_new();
 699         e=BN_new();
 700
 701         BN_rand(a,1024,0,0); /**/
 702         for (i=0; i<num0; i++)
 703                 {
 704                 BN_rand(b,450+i*10,0,0); /**/
 705                 a->neg=rand_neg();
 706                 b->neg=rand_neg();
 707                 if (bp == NULL)
 708                         for (j=0; j<100; j++)
 709                                 BN_mod(c,a,b,ctx);/**/
 710                 BN_mod(c,a,b,ctx);/**/
 711                 if (bp != NULL)
 712                         {
 713                         if (!results)
 714                                 {
 715                                 BN_print(bp,a);
 716                                 BIO_puts(bp," % ");
 717                                 BN_print(bp,b);
 718                                 BIO_puts(bp," - ");
 719                                 }
 720                         BN_print(bp,c);
 721                         BIO_puts(bp,"\n");
 722                         }
 723                 BN_div(d,e,a,b,ctx);
 724                 BN_sub(e,e,c);
 725                 if(!BN_is_zero(e))
 726                     {
 727                     fprintf(stderr,"Modulo test failed!\n");
 728                     return 0;
 729                     }
 730                 }
 731         BN_free(a);
 732         BN_free(b);
 733         BN_free(c);
 734         BN_free(d);
 735         BN_free(e);
 736         return(1);
 737         }
 738
 739 int test_mod_mul(BIO *bp, BN_CTX *ctx)
 740         {
 741         BIGNUM *a,*b,*c,*d,*e;
 742         int i;
 743
 744         a=BN_new();
 745         b=BN_new();
 746         c=BN_new();
 747         d=BN_new();
 748         e=BN_new();
 749
 750         BN_rand(c,1024,0,0); /**/
 751         for (i=0; i<num0; i++)
 752                 {
 753                 BN_rand(a,475+i*10,0,0); /**/
 754                 BN_rand(b,425+i*11,0,0); /**/
 755                 a->neg=rand_neg();
 756                 b->neg=rand_neg();
 757         /*      if (bp == NULL)
 758                         for (j=0; j<100; j++)
 759                                 BN_mod_mul(d,a,b,c,ctx);*/ /**/
 760
 761                 if (!BN_mod_mul(e,a,b,c,ctx))
 762                         {
 763                         unsigned long l;
 764
 765                         while ((l=ERR_get_error()))
 766                                 fprintf(stderr,"ERROR:%s\n",
 767                                         ERR_error_string(l,NULL));
 768                         exit(1);
 769                         }
 770                 if (bp != NULL)
 771                         {
 772                         if (!results)
 773                                 {
 774                                 BN_print(bp,a);
 775                                 BIO_puts(bp," * ");
 776                                 BN_print(bp,b);
 777                                 BIO_puts(bp," % ");
 778                                 BN_print(bp,c);
 779                                 if ((a->neg ^ b->neg) && !BN_is_zero(e))
 780                                         {
 781                                         /* If  (a*b) % c  is negative,  c  must be added
 782                                          * in order to obtain the normalized remainder
 783                                          * (new with OpenSSL 0.9.7, previous versions of
 784                                          * BN_mod_mul could generate negative results)
 785                                          */
 786                                         BIO_puts(bp," + ");
 787                                         BN_print(bp,c);
 788                                         }
 789                                 BIO_puts(bp," - ");
 790                                 }
 791                         BN_print(bp,e);
 792                         BIO_puts(bp,"\n");
 793                         }
 794                 BN_mul(d,a,b,ctx);
 795                 BN_sub(d,d,e);
 796                 BN_div(a,b,d,c,ctx);
 797                 if(!BN_is_zero(b))
 798                     {
 799                     fprintf(stderr,"Modulo multiply test failed!\n");
 800                     ERR_print_errors_fp(stderr);
 801                     return 0;
 802                     }
 803                 }
 804         BN_free(a);
 805         BN_free(b);
 806         BN_free(c);
 807         BN_free(d);
 808         BN_free(e);
 809         return(1);
 810         }
 811
 812 int test_mod_exp(BIO *bp, BN_CTX *ctx)
 813         {
 814         BIGNUM *a,*b,*c,*d,*e;
 815         int i;
 816
 817         a=BN_new();
 818         b=BN_new();
 819         c=BN_new();
 820         d=BN_new();
 821         e=BN_new();
 822
 823         BN_rand(c,30,0,1); /* must be odd for montgomery */
 824         for (i=0; i<num2; i++)
 825                 {
 826                 BN_rand(a,20+i*5,0,0); /**/
 827                 BN_rand(b,2+i,0,0); /**/
 828
 829                 if (!BN_mod_exp(d,a,b,c,ctx))
 830                         return(00);
 831
 832                 if (bp != NULL)
 833                         {
 834                         if (!results)
 835                                 {
 836                                 BN_print(bp,a);
 837                                 BIO_puts(bp," ^ ");
 838                                 BN_print(bp,b);
 839                                 BIO_puts(bp," % ");
 840                                 BN_print(bp,c);
 841                                 BIO_puts(bp," - ");
 842                                 }
 843                         BN_print(bp,d);
 844                         BIO_puts(bp,"\n");
 845                         }
 846                 BN_exp(e,a,b,ctx);
 847                 BN_sub(e,e,d);
 848                 BN_div(a,b,e,c,ctx);
 849                 if(!BN_is_zero(b))
 850                     {
 851                     fprintf(stderr,"Modulo exponentiation test failed!\n");
 852                     return 0;
 853                     }
 854                 }
 855         BN_free(a);
 856         BN_free(b);
 857         BN_free(c);
 858         BN_free(d);
 859         BN_free(e);
 860         return(1);
 861         }
 862
 863 int test_exp(BIO *bp, BN_CTX *ctx)
 864         {
 865         BIGNUM *a,*b,*d,*e,*one;
 866         int i;
 867
 868         a=BN_new();
 869         b=BN_new();
 870         d=BN_new();
 871         e=BN_new();
 872         one=BN_new();
 873         BN_one(one);
 874
 875         for (i=0; i<num2; i++)
 876                 {
 877                 BN_rand(a,20+i*5,0,0); /**/
 878                 BN_rand(b,2+i,0,0); /**/
 879
 880                 if (!BN_exp(d,a,b,ctx))
 881                         return(00);
 882
 883                 if (bp != NULL)
 884                         {
 885                         if (!results)
 886                                 {
 887                                 BN_print(bp,a);
 888                                 BIO_puts(bp," ^ ");
 889                                 BN_print(bp,b);
 890                                 BIO_puts(bp," - ");
 891                                 }
 892                         BN_print(bp,d);
 893                         BIO_puts(bp,"\n");
 894                         }
 895                 BN_one(e);
 896                 for( ; !BN_is_zero(b) ; BN_sub(b,b,one))
 897                     BN_mul(e,e,a,ctx);
 898                 BN_sub(e,e,d);
 899                 if(!BN_is_zero(e))
 900                     {
 901                     fprintf(stderr,"Exponentiation test failed!\n");
 902                     return 0;
 903                     }
 904                 }
 905         BN_free(a);
 906         BN_free(b);
 907         BN_free(d);
 908         BN_free(e);
 909         BN_free(one);
 910         return(1);
 911         }
 912
 913 static void genprime_cb(int p, int n, void *arg)
 914         {
 915         char c='*';
 916
 917         if (p == 0) c='.';
 918         if (p == 1) c='+';
 919         if (p == 2) c='*';
 920         if (p == 3) c='\n';
 921         putc(c, stderr);
 922         fflush(stderr);
 923         (void)n;
 924         (void)arg;
 925         }
 926
 927 int test_kron(BIO *bp, BN_CTX *ctx)
 928         {
 929         BIGNUM *a,*b,*r,*t;
 930         int i;
 931         int legendre, kronecker;
 932         int ret = 0;
 933
 934         a = BN_new();
 935         b = BN_new();
 936         r = BN_new();
 937         t = BN_new();
 938         if (a == NULL || b == NULL || r == NULL || t == NULL) goto err;
 939
 940         /* We test BN_kronecker(a, b, ctx) just for  b  odd (Jacobi symbol).
 941          * In this case we know that if  b  is prime, then BN_kronecker(a, b, ctx)
 942          * is congruent to $a^{(b-1)/2}$, modulo $b$ (Legendre symbol).
 943          * So we generate a random prime  b  and compare these values
 944          * for a number of random  a's.  (That is, we run the Solovay-Strassen
 945          * primality test to confirm that  b  is prime, except that we
 946          * don't want to test whether  b  is prime but whether BN_kronecker
 947          * works.) */
 948
 949 #if 0
 950         if (!BN_generate_prime(b, 512, 0, NULL, NULL, genprime_cb, NULL)) goto err;
 951 #else
 952         if (!BN_set_word(b,65537)) goto err;
 953 #endif
 954         putc('\n', stderr);
 955
 956         for (i = 0; i < num0; i++)
 957                 {
 958 #if 0
 959                 if (!BN_rand(a, 512, 0, 0)) goto err;
 960                 a->neg = rand_neg();
 961 #else
 962                 if (!BN_bin2bn("\x01\xff\xff\xff\xff", 5, a)) goto err;
 963 #endif
 964
 965                 /* t := (b-1)/2  (note that b is odd) */
 966                 if (!BN_copy(t, b)) goto err;
 967                 if (!BN_sub_word(t, 1)) goto err;
 968                 if (!BN_rshift1(t, t)) goto err;
 969                 /* r := a^t mod b */
 970 #if 0
 971                 if (!BN_mod_exp(r, a, t, b, ctx)) goto err;
 972 #elif 0
 973                 if (!BN_mod_exp_recp(r, a, t, b, ctx)) goto err;
 974 #else
 975                 if (!BN_mod_exp_simple(r, a, t, b, ctx)) goto err;
 976 #endif
 977
 978                 if (BN_is_word(r, 1))
 979                         legendre = 1;
 980                 else if (BN_is_zero(r))
 981                         legendre = 0;
 982                 else
 983                         {
 984                         if (!BN_add_word(r, 1)) goto err;
 985                         if (0 != BN_cmp(r, b))
 986                                 {
 987                                 fprintf(stderr, "Legendre symbol computation failed\n");
 988                                 goto err;
 989                                 }
 990                         legendre = -1;
 991                         }
 992
 993                 kronecker = BN_kronecker(a, b, ctx);
 994                 if (kronecker < -1) goto err;
 995
 996                 if (legendre != kronecker)
 997                         {
 998                         fprintf(stderr, "legendre != kronecker; a = ");
 999                         BN_print_fp(stderr, a);
1000                         fprintf(stderr, ", a = ");
1001                         BN_print_fp(stderr, b);
1002                         fprintf(stderr, "\n");
1003                         goto err;
1004                         }
1005
1006                 putc('.', stderr);
1007                 fflush(stderr);
1008                 }
1009
1010         putc('\n', stderr);
1011         fflush(stderr);
1012         ret = 1;
1013  err:
1014         if (a != NULL) BN_free(a);
1015         if (b != NULL) BN_free(b);
1016         if (r != NULL) BN_free(r);
1017         if (t != NULL) BN_free(t);
1018         return ret;
1019         }
1020
1021 int test_sqrt(BIO *bp, BN_CTX *ctx)
1022         {
1023         BIGNUM *a,*p,*r;
1024         int i, j;
1025         int ret = 0;
1026
1027         a = BN_new();
1028         p = BN_new();
1029         r = BN_new();
1030         if (a == NULL || p == NULL || r == NULL) goto err;
1031
1032         for (i = 0; i < 16; i++)
1033                 {
1034                 if (i < 8)
1035                         {
1036                         unsigned primes[8] = { 2, 3, 5, 7, 11, 13, 17, 19 };
1037
1038                         if (!BN_set_word(p, primes[i])) goto err;
1039                         }
1040                 else
1041                         {
1042                         if (!BN_set_word(a, 32)) goto err;
1043                         if (!BN_set_word(r, 2*i + 1)) goto err;
1044
1045                         if (!BN_generate_prime(p, 256, 0, a, r, genprime_cb, NULL)) goto err;
1046                         putc('\n', stderr);
1047                         }
1048
1049                 for (j = 0; j < num2; j++)
1050                         {
1051                         /* construct 'a' such that it is a square modulo p,
1052                          * but in general not a proper square and not reduced modulo p */
1053                         if (!BN_rand(r, 256, 0, 3)) goto err;
1054                         if (!BN_nnmod(r, r, p, ctx)) goto err;
1055                         if (!BN_mod_sqr(r, r, p, ctx)) goto err;
1056                         if (!BN_rand(a, 256, 0, 3)) goto err;
1057                         if (!BN_nnmod(a, a, p, ctx)) goto err;
1058                         if (!BN_mod_sqr(a, a, p, ctx)) goto err;
1059                         if (!BN_mul(a, a, r, ctx)) goto err;
1060
1061                         if (!BN_mod_sqrt(r, a, p, ctx)) goto err;
1062                         if (!BN_mod_sqr(r, r, p, ctx)) goto err;
1063
1064                         if (!BN_nnmod(a, a, p, ctx)) goto err;
1065
1066                         if (BN_cmp(a, r) != 0)
1067                                 {
1068                                 fprintf(stderr, "BN_mod_sqrt failed: a = ");
1069                                 BN_print_fp(stderr, a);
1070                                 fprintf(stderr, ", r = ");
1071                                 BN_print_fp(stderr, r);
1072                                 fprintf(stderr, ", p = ");
1073                                 BN_print_fp(stderr, p);
1074                                 fprintf(stderr, "\n");
1075                                 goto err;
1076                                 }
1077
1078                         putc('.', stderr);
1079                         fflush(stderr);
1080                         }
1081
1082                 putc('\n', stderr);
1083                 fflush(stderr);
1084                 }
1085         ret = 1;
1086  err:
1087         if (a != NULL) BN_free(a);
1088         if (p != NULL) BN_free(p);
1089         if (r != NULL) BN_free(r);
1090         return ret;
1091         }
1092
1093 int test_lshift(BIO *bp,BN_CTX *ctx,BIGNUM *a_)
1094         {
1095         BIGNUM *a,*b,*c,*d;
1096         int i;
1097
1098         b=BN_new();
1099         c=BN_new();
1100         d=BN_new();
1101         BN_one(c);
1102
1103         if(a_)
1104             a=a_;
1105         else
1106             {
1107             a=BN_new();
1108             BN_rand(a,200,0,0); /**/
1109             a->neg=rand_neg();
1110             }
1111         for (i=0; i<num0; i++)
1112                 {
1113                 BN_lshift(b,a,i+1);
1114                 BN_add(c,c,c);
1115                 if (bp != NULL)
1116                         {
1117                         if (!results)
1118                                 {
1119                                 BN_print(bp,a);
1120                                 BIO_puts(bp," * ");
1121                                 BN_print(bp,c);
1122                                 BIO_puts(bp," - ");
1123                                 }
1124                         BN_print(bp,b);
1125                         BIO_puts(bp,"\n");
1126                         }
1127                 BN_mul(d,a,c,ctx);
1128                 BN_sub(d,d,b);
1129                 if(!BN_is_zero(d))
1130                     {
1131                     fprintf(stderr,"Left shift test failed!\n");
1132                     fprintf(stderr,"a=");
1133                     BN_print_fp(stderr,a);
1134                     fprintf(stderr,"\nb=");
1135                     BN_print_fp(stderr,b);
1136                     fprintf(stderr,"\nc=");
1137                     BN_print_fp(stderr,c);
1138                     fprintf(stderr,"\nd=");
1139                     BN_print_fp(stderr,d);
1140                     fprintf(stderr,"\n");
1141                     return 0;
1142                     }
1143                 }
1144         BN_free(a);
1145         BN_free(b);
1146         BN_free(c);
1147         BN_free(d);
1148         return(1);
1149         }
1150
1151 int test_lshift1(BIO *bp)
1152         {
1153         BIGNUM *a,*b,*c;
1154         int i;
1155
1156         a=BN_new();
1157         b=BN_new();
1158         c=BN_new();
1159
1160         BN_rand(a,200,0,0); /**/
1161         a->neg=rand_neg();
1162         for (i=0; i<num0; i++)
1163                 {
1164                 BN_lshift1(b,a);
1165                 if (bp != NULL)
1166                         {
1167                         if (!results)
1168                                 {
1169                                 BN_print(bp,a);
1170                                 BIO_puts(bp," * 2");
1171                                 BIO_puts(bp," - ");
1172                                 }
1173                         BN_print(bp,b);
1174                         BIO_puts(bp,"\n");
1175                         }
1176                 BN_add(c,a,a);
1177                 BN_sub(a,b,c);
1178                 if(!BN_is_zero(a))
1179                     {
1180                     fprintf(stderr,"Left shift one test failed!\n");
1181                     return 0;
1182                     }
1183
1184                 BN_copy(a,b);
1185                 }
1186         BN_free(a);
1187         BN_free(b);
1188         BN_free(c);
1189         return(1);
1190         }
1191
1192 int test_rshift(BIO *bp,BN_CTX *ctx)
1193         {
1194         BIGNUM *a,*b,*c,*d,*e;
1195         int i;
1196
1197         a=BN_new();
1198         b=BN_new();
1199         c=BN_new();
1200         d=BN_new();
1201         e=BN_new();
1202         BN_one(c);
1203
1204         BN_rand(a,200,0,0); /**/
1205         a->neg=rand_neg();
1206         for (i=0; i<num0; i++)
1207                 {
1208                 BN_rshift(b,a,i+1);
1209                 BN_add(c,c,c);
1210                 if (bp != NULL)
1211                         {
1212                         if (!results)
1213                                 {
1214                                 BN_print(bp,a);
1215                                 BIO_puts(bp," / ");
1216                                 BN_print(bp,c);
1217                                 BIO_puts(bp," - ");
1218                                 }
1219                         BN_print(bp,b);
1220                         BIO_puts(bp,"\n");
1221                         }
1222                 BN_div(d,e,a,c,ctx);
1223                 BN_sub(d,d,b);
1224                 if(!BN_is_zero(d))
1225                     {
1226                     fprintf(stderr,"Right shift test failed!\n");
1227                     return 0;
1228                     }
1229                 }
1230         BN_free(a);
1231         BN_free(b);
1232         BN_free(c);
1233         BN_free(d);
1234         BN_free(e);
1235         return(1);
1236         }
1237
1238 int test_rshift1(BIO *bp)
1239         {
1240         BIGNUM *a,*b,*c;
1241         int i;
1242
1243         a=BN_new();
1244         b=BN_new();
1245         c=BN_new();
1246
1247         BN_rand(a,200,0,0); /**/
1248         a->neg=rand_neg();
1249         for (i=0; i<num0; i++)
1250                 {
1251                 BN_rshift1(b,a);
1252                 if (bp != NULL)
1253                         {
1254                         if (!results)
1255                                 {
1256                                 BN_print(bp,a);
1257                                 BIO_puts(bp," / 2");
1258                                 BIO_puts(bp," - ");
1259                                 }
1260                         BN_print(bp,b);
1261                         BIO_puts(bp,"\n");
1262                         }
1263                 BN_sub(c,a,b);
1264                 BN_sub(c,c,b);
1265                 if(!BN_is_zero(c) && !BN_is_one(c))
1266                     {
1267                     fprintf(stderr,"Right shift one test failed!\n");
1268                     return 0;
1269                     }
1270                 BN_copy(a,b);
1271                 }
1272         BN_free(a);
1273         BN_free(b);
1274         BN_free(c);
1275         return(1);
1276         }
1277
1278 int rand_neg(void)
1279         {
1280         static unsigned int neg=0;
1281         static int sign[8]={0,0,0,1,1,0,1,1};
1282
1283         return(sign[(neg++)%8]);
1284         }