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ecparam.c
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1 /* apps/ecparam.c */
2 /*
3  * Written by Nils Larsch for the OpenSSL project.
4  */
5 /* ====================================================================
6  * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  * notice, this list of conditions and the following disclaimer in
17  * the documentation and/or other materials provided with the
18  * distribution.
19  *
20  * 3. All advertising materials mentioning features or use of this
21  * software must display the following acknowledgment:
22  * "This product includes software developed by the OpenSSL Project
23  * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
24  *
25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26  * endorse or promote products derived from this software without
27  * prior written permission. For written permission, please contact
28  * [email protected].
29  *
30  * 5. Products derived from this software may not be called "OpenSSL"
31  * nor may "OpenSSL" appear in their names without prior written
32  * permission of the OpenSSL Project.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  * acknowledgment:
36  * "This product includes software developed by the OpenSSL Project
37  * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
38  *
39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50  * OF THE POSSIBILITY OF SUCH DAMAGE.
51  * ====================================================================
52  *
53  * This product includes cryptographic software written by Eric Young
54  * ([email protected]). This product includes software written by Tim
55  * Hudson ([email protected]).
56  *
57  */
58 /* ====================================================================
59  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60  *
61  * Portions of the attached software ("Contribution") are developed by
62  * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
63  *
64  * The Contribution is licensed pursuant to the OpenSSL open source
65  * license provided above.
66  *
67  * The elliptic curve binary polynomial software is originally written by
68  * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
69  *
70  */
71 
72 #include <openssl/opensslconf.h>
73 #ifndef OPENSSL_NO_EC
74 #include <assert.h>
75 #include <stdio.h>
76 #include <stdlib.h>
77 #include <time.h>
78 #include <string.h>
79 #include "apps.h"
80 #include <openssl/bio.h>
81 #include <openssl/err.h>
82 #include <openssl/bn.h>
83 #include <openssl/ec.h>
84 #include <openssl/x509.h>
85 #include <openssl/pem.h>
86 
87 #undef PROG
88 #define PROG ecparam_main
89 
90 /* -inform arg - input format - default PEM (DER or PEM)
91  * -outform arg - output format - default PEM
92  * -in arg - input file - default stdin
93  * -out arg - output file - default stdout
94  * -noout - do not print the ec parameter
95  * -text - print the ec parameters in text form
96  * -check - validate the ec parameters
97  * -C - print a 'C' function creating the parameters
98  * -name arg - use the ec parameters with 'short name' name
99  * -list_curves - prints a list of all currently available curve 'short names'
100  * -conv_form arg - specifies the point conversion form
101  * - possible values: compressed
102  * uncompressed (default)
103  * hybrid
104  * -param_enc arg - specifies the way the ec parameters are encoded
105  * in the asn1 der encoding
106  * possible values: named_curve (default)
107  * explicit
108  * -no_seed - if 'explicit' parameters are choosen do not use the seed
109  * -genkey - generate ec key
110  * -rand file - files to use for random number input
111  * -engine e - use engine e, possibly a hardware device
112  */
113 
114 
115 static int ecparam_print_var(BIO *,BIGNUM *,const char *,int,unsigned char *);
116 
117 int MAIN(int, char **);
118 
119 int MAIN(int argc, char **argv)
120  {
121  EC_GROUP *group = NULL;
122  point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
123  int new_form = 0;
124  int asn1_flag = OPENSSL_EC_NAMED_CURVE;
125  int new_asn1_flag = 0;
126  char *curve_name = NULL, *inrand = NULL;
127  int list_curves = 0, no_seed = 0, check = 0,
128  badops = 0, text = 0, i, need_rand = 0, genkey = 0;
129  char *infile = NULL, *outfile = NULL, *prog;
130  BIO *in = NULL, *out = NULL;
131  int informat, outformat, noout = 0, C = 0, ret = 1;
132  char *engine = NULL;
133 
134  BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL,
135  *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
136  unsigned char *buffer = NULL;
137 
138  apps_startup();
139 
140  if (bio_err == NULL)
141  if ((bio_err=BIO_new(BIO_s_file())) != NULL)
142  BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
143 
144  if (!load_config(bio_err, NULL))
145  goto end;
146 
147  informat=FORMAT_PEM;
148  outformat=FORMAT_PEM;
149 
150  prog=argv[0];
151  argc--;
152  argv++;
153  while (argc >= 1)
154  {
155  if (strcmp(*argv,"-inform") == 0)
156  {
157  if (--argc < 1) goto bad;
158  informat=str2fmt(*(++argv));
159  }
160  else if (strcmp(*argv,"-outform") == 0)
161  {
162  if (--argc < 1) goto bad;
163  outformat=str2fmt(*(++argv));
164  }
165  else if (strcmp(*argv,"-in") == 0)
166  {
167  if (--argc < 1) goto bad;
168  infile= *(++argv);
169  }
170  else if (strcmp(*argv,"-out") == 0)
171  {
172  if (--argc < 1) goto bad;
173  outfile= *(++argv);
174  }
175  else if (strcmp(*argv,"-text") == 0)
176  text = 1;
177  else if (strcmp(*argv,"-C") == 0)
178  C = 1;
179  else if (strcmp(*argv,"-check") == 0)
180  check = 1;
181  else if (strcmp (*argv, "-name") == 0)
182  {
183  if (--argc < 1)
184  goto bad;
185  curve_name = *(++argv);
186  }
187  else if (strcmp(*argv, "-list_curves") == 0)
188  list_curves = 1;
189  else if (strcmp(*argv, "-conv_form") == 0)
190  {
191  if (--argc < 1)
192  goto bad;
193  ++argv;
194  new_form = 1;
195  if (strcmp(*argv, "compressed") == 0)
196  form = POINT_CONVERSION_COMPRESSED;
197  else if (strcmp(*argv, "uncompressed") == 0)
198  form = POINT_CONVERSION_UNCOMPRESSED;
199  else if (strcmp(*argv, "hybrid") == 0)
200  form = POINT_CONVERSION_HYBRID;
201  else
202  goto bad;
203  }
204  else if (strcmp(*argv, "-param_enc") == 0)
205  {
206  if (--argc < 1)
207  goto bad;
208  ++argv;
209  new_asn1_flag = 1;
210  if (strcmp(*argv, "named_curve") == 0)
211  asn1_flag = OPENSSL_EC_NAMED_CURVE;
212  else if (strcmp(*argv, "explicit") == 0)
213  asn1_flag = 0;
214  else
215  goto bad;
216  }
217  else if (strcmp(*argv, "-no_seed") == 0)
218  no_seed = 1;
219  else if (strcmp(*argv, "-noout") == 0)
220  noout=1;
221  else if (strcmp(*argv,"-genkey") == 0)
222  {
223  genkey=1;
224  need_rand=1;
225  }
226  else if (strcmp(*argv, "-rand") == 0)
227  {
228  if (--argc < 1) goto bad;
229  inrand= *(++argv);
230  need_rand=1;
231  }
232  else if(strcmp(*argv, "-engine") == 0)
233  {
234  if (--argc < 1) goto bad;
235  engine = *(++argv);
236  }
237  else
238  {
239  BIO_printf(bio_err,"unknown option %s\n",*argv);
240  badops=1;
241  break;
242  }
243  argc--;
244  argv++;
245  }
246 
247  if (badops)
248  {
249 bad:
250  BIO_printf(bio_err, "%s [options] <infile >outfile\n",prog);
251  BIO_printf(bio_err, "where options are\n");
252  BIO_printf(bio_err, " -inform arg input format - "
253  "default PEM (DER or PEM)\n");
254  BIO_printf(bio_err, " -outform arg output format - "
255  "default PEM\n");
256  BIO_printf(bio_err, " -in arg input file - "
257  "default stdin\n");
258  BIO_printf(bio_err, " -out arg output file - "
259  "default stdout\n");
260  BIO_printf(bio_err, " -noout do not print the "
261  "ec parameter\n");
262  BIO_printf(bio_err, " -text print the ec "
263  "parameters in text form\n");
264  BIO_printf(bio_err, " -check validate the ec "
265  "parameters\n");
266  BIO_printf(bio_err, " -C print a 'C' "
267  "function creating the parameters\n");
268  BIO_printf(bio_err, " -name arg use the "
269  "ec parameters with 'short name' name\n");
270  BIO_printf(bio_err, " -list_curves prints a list of "
271  "all currently available curve 'short names'\n");
272  BIO_printf(bio_err, " -conv_form arg specifies the "
273  "point conversion form \n");
274  BIO_printf(bio_err, " possible values:"
275  " compressed\n");
276  BIO_printf(bio_err, " "
277  " uncompressed (default)\n");
278  BIO_printf(bio_err, " "
279  " hybrid\n");
280  BIO_printf(bio_err, " -param_enc arg specifies the way"
281  " the ec parameters are encoded\n");
282  BIO_printf(bio_err, " in the asn1 der "
283  "encoding\n");
284  BIO_printf(bio_err, " possible values:"
285  " named_curve (default)\n");
286  BIO_printf(bio_err, " "
287  " explicit\n");
288  BIO_printf(bio_err, " -no_seed if 'explicit'"
289  " parameters are choosen do not"
290  " use the seed\n");
291  BIO_printf(bio_err, " -genkey generate ec"
292  " key\n");
293  BIO_printf(bio_err, " -rand file files to use for"
294  " random number input\n");
295  BIO_printf(bio_err, " -engine e use engine e, "
296  "possibly a hardware device\n");
297  goto end;
298  }
299 
300  ERR_load_crypto_strings();
301 
302  in=BIO_new(BIO_s_file());
303  out=BIO_new(BIO_s_file());
304  if ((in == NULL) || (out == NULL))
305  {
306  ERR_print_errors(bio_err);
307  goto end;
308  }
309 
310  if (infile == NULL)
311  BIO_set_fp(in,stdin,BIO_NOCLOSE);
312  else
313  {
314  if (BIO_read_filename(in,infile) <= 0)
315  {
316  perror(infile);
317  goto end;
318  }
319  }
320  if (outfile == NULL)
321  {
322  BIO_set_fp(out,stdout,BIO_NOCLOSE);
323 #ifdef OPENSSL_SYS_VMS
324  {
325  BIO *tmpbio = BIO_new(BIO_f_linebuffer());
326  out = BIO_push(tmpbio, out);
327  }
328 #endif
329  }
330  else
331  {
332  if (BIO_write_filename(out,outfile) <= 0)
333  {
334  perror(outfile);
335  goto end;
336  }
337  }
338 
339 #ifndef OPENSSL_NO_ENGINE
340  setup_engine(bio_err, engine, 0);
341 #endif
342 
343  if (list_curves)
344  {
345  EC_builtin_curve *curves = NULL;
346  size_t crv_len = 0;
347  size_t n = 0;
348 
349  crv_len = EC_get_builtin_curves(NULL, 0);
350 
351  curves = OPENSSL_malloc((int)(sizeof(EC_builtin_curve) * crv_len));
352 
353  if (curves == NULL)
354  goto end;
355 
356  if (!EC_get_builtin_curves(curves, crv_len))
357  {
358  OPENSSL_free(curves);
359  goto end;
360  }
361 
362 
363  for (n = 0; n < crv_len; n++)
364  {
365  const char *comment;
366  const char *sname;
367  comment = curves[n].comment;
368  sname = OBJ_nid2sn(curves[n].nid);
369  if (comment == NULL)
370  comment = "CURVE DESCRIPTION NOT AVAILABLE";
371  if (sname == NULL)
372  sname = "";
373 
374  BIO_printf(out, " %-10s: ", sname);
375  BIO_printf(out, "%s\n", comment);
376  }
377 
378  OPENSSL_free(curves);
379  ret = 0;
380  goto end;
381  }
382 
383  if (curve_name != NULL)
384  {
385  int nid;
386 
387  /* workaround for the SECG curve names secp192r1
388  * and secp256r1 (which are the same as the curves
389  * prime192v1 and prime256v1 defined in X9.62)
390  */
391  if (!strcmp(curve_name, "secp192r1"))
392  {
393  BIO_printf(bio_err, "using curve name prime192v1 "
394  "instead of secp192r1\n");
395  nid = NID_X9_62_prime192v1;
396  }
397  else if (!strcmp(curve_name, "secp256r1"))
398  {
399  BIO_printf(bio_err, "using curve name prime256v1 "
400  "instead of secp256r1\n");
401  nid = NID_X9_62_prime256v1;
402  }
403  else
404  nid = OBJ_sn2nid(curve_name);
405 
406  if (nid == 0)
407  {
408  BIO_printf(bio_err, "unknown curve name (%s)\n",
409  curve_name);
410  goto end;
411  }
412 
413  group = EC_GROUP_new_by_curve_name(nid);
414  if (group == NULL)
415  {
416  BIO_printf(bio_err, "unable to create curve (%s)\n",
417  curve_name);
418  goto end;
419  }
420  EC_GROUP_set_asn1_flag(group, asn1_flag);
421  EC_GROUP_set_point_conversion_form(group, form);
422  }
423  else if (informat == FORMAT_ASN1)
424  {
425  group = d2i_ECPKParameters_bio(in, NULL);
426  }
427  else if (informat == FORMAT_PEM)
428  {
429  group = PEM_read_bio_ECPKParameters(in,NULL,NULL,NULL);
430  }
431  else
432  {
433  BIO_printf(bio_err, "bad input format specified\n");
434  goto end;
435  }
436 
437  if (group == NULL)
438  {
439  BIO_printf(bio_err,
440  "unable to load elliptic curve parameters\n");
441  ERR_print_errors(bio_err);
442  goto end;
443  }
444 
445  if (new_form)
446  EC_GROUP_set_point_conversion_form(group, form);
447 
448  if (new_asn1_flag)
449  EC_GROUP_set_asn1_flag(group, asn1_flag);
450 
451  if (no_seed)
452  {
453  EC_GROUP_set_seed(group, NULL, 0);
454  }
455 
456  if (text)
457  {
458  if (!ECPKParameters_print(out, group, 0))
459  goto end;
460  }
461 
462  if (check)
463  {
464  if (group == NULL)
465  BIO_printf(bio_err, "no elliptic curve parameters\n");
466  BIO_printf(bio_err, "checking elliptic curve parameters: ");
467  if (!EC_GROUP_check(group, NULL))
468  {
469  BIO_printf(bio_err, "failed\n");
470  ERR_print_errors(bio_err);
471  }
472  else
473  BIO_printf(bio_err, "ok\n");
474 
475  }
476 
477  if (C)
478  {
479  size_t buf_len = 0, tmp_len = 0;
480  const EC_POINT *point;
481  int is_prime, len = 0;
482  const EC_METHOD *meth = EC_GROUP_method_of(group);
483 
484  if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
485  (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
486  (ec_order = BN_new()) == NULL ||
487  (ec_cofactor = BN_new()) == NULL )
488  {
489  perror("OPENSSL_malloc");
490  goto end;
491  }
492 
493  is_prime = (EC_METHOD_get_field_type(meth) ==
494  NID_X9_62_prime_field);
495 
496  if (is_prime)
497  {
498  if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a,
499  ec_b, NULL))
500  goto end;
501  }
502  else
503  {
504  /* TODO */
505  goto end;
506  }
507 
508  if ((point = EC_GROUP_get0_generator(group)) == NULL)
509  goto end;
510  if (!EC_POINT_point2bn(group, point,
511  EC_GROUP_get_point_conversion_form(group), ec_gen,
512  NULL))
513  goto end;
514  if (!EC_GROUP_get_order(group, ec_order, NULL))
515  goto end;
516  if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
517  goto end;
518 
519  if (!ec_p || !ec_a || !ec_b || !ec_gen ||
520  !ec_order || !ec_cofactor)
521  goto end;
522 
523  len = BN_num_bits(ec_order);
524 
525  if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
526  buf_len = tmp_len;
527  if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
528  buf_len = tmp_len;
529  if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
530  buf_len = tmp_len;
531  if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
532  buf_len = tmp_len;
533  if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
534  buf_len = tmp_len;
535  if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
536  buf_len = tmp_len;
537 
538  buffer = (unsigned char *)OPENSSL_malloc(buf_len);
539 
540  if (buffer == NULL)
541  {
542  perror("OPENSSL_malloc");
543  goto end;
544  }
545 
546  ecparam_print_var(out, ec_p, "ec_p", len, buffer);
547  ecparam_print_var(out, ec_a, "ec_a", len, buffer);
548  ecparam_print_var(out, ec_b, "ec_b", len, buffer);
549  ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
550  ecparam_print_var(out, ec_order, "ec_order", len, buffer);
551  ecparam_print_var(out, ec_cofactor, "ec_cofactor", len,
552  buffer);
553 
554  BIO_printf(out, "\n\n");
555 
556  BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
557  BIO_printf(out, "\tint ok=0;\n");
558  BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
559  BIO_printf(out, "\tEC_POINT *point = NULL;\n");
560  BIO_printf(out, "\tBIGNUM *tmp_1 = NULL, *tmp_2 = NULL, "
561  "*tmp_3 = NULL;\n\n");
562  BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
563  "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
564  "goto err;\n", len, len);
565  BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
566  "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
567  "goto err;\n", len, len);
568  BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
569  "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
570  "goto err;\n", len, len);
571  if (is_prime)
572  {
573  BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
574  "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
575  "\n\t\tgoto err;\n\n");
576  }
577  else
578  {
579  /* TODO */
580  goto end;
581  }
582  BIO_printf(out, "\t/* build generator */\n");
583  BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
584  "sizeof(ec_gen_%d), tmp_1)) == NULL)"
585  "\n\t\tgoto err;\n", len, len);
586  BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
587  "NULL, NULL);\n");
588  BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
589  BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
590  "sizeof(ec_order_%d), tmp_2)) == NULL)"
591  "\n\t\tgoto err;\n", len, len);
592  BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
593  "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
594  "\n\t\tgoto err;\n", len, len);
595  BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
596  " tmp_2, tmp_3))\n\t\tgoto err;\n");
597  BIO_printf(out, "\n\tok=1;\n");
598  BIO_printf(out, "err:\n");
599  BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
600  BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
601  BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
602  BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
603  BIO_printf(out, "\tif (!ok)\n");
604  BIO_printf(out, "\t\t{\n");
605  BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
606  BIO_printf(out, "\t\tgroup = NULL;\n");
607  BIO_printf(out, "\t\t}\n");
608  BIO_printf(out, "\treturn(group);\n\t}\n");
609  }
610 
611  if (!noout)
612  {
613  if (outformat == FORMAT_ASN1)
614  i = i2d_ECPKParameters_bio(out, group);
615  else if (outformat == FORMAT_PEM)
616  i = PEM_write_bio_ECPKParameters(out, group);
617  else
618  {
619  BIO_printf(bio_err,"bad output format specified for"
620  " outfile\n");
621  goto end;
622  }
623  if (!i)
624  {
625  BIO_printf(bio_err, "unable to write elliptic "
626  "curve parameters\n");
627  ERR_print_errors(bio_err);
628  goto end;
629  }
630  }
631 
632  if (need_rand)
633  {
634  app_RAND_load_file(NULL, bio_err, (inrand != NULL));
635  if (inrand != NULL)
636  BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
637  app_RAND_load_files(inrand));
638  }
639 
640  if (genkey)
641  {
642  EC_KEY *eckey = EC_KEY_new();
643 
644  if (eckey == NULL)
645  goto end;
646 
647  assert(need_rand);
648 
649  if (EC_KEY_set_group(eckey, group) == 0)
650  goto end;
651 
652  if (!EC_KEY_generate_key(eckey))
653  {
654  EC_KEY_free(eckey);
655  goto end;
656  }
657  if (outformat == FORMAT_ASN1)
658  i = i2d_ECPrivateKey_bio(out, eckey);
659  else if (outformat == FORMAT_PEM)
660  i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
661  NULL, 0, NULL, NULL);
662  else
663  {
664  BIO_printf(bio_err, "bad output format specified "
665  "for outfile\n");
666  EC_KEY_free(eckey);
667  goto end;
668  }
669  EC_KEY_free(eckey);
670  }
671 
672  if (need_rand)
673  app_RAND_write_file(NULL, bio_err);
674 
675  ret=0;
676 end:
677  if (ec_p)
678  BN_free(ec_p);
679  if (ec_a)
680  BN_free(ec_a);
681  if (ec_b)
682  BN_free(ec_b);
683  if (ec_gen)
684  BN_free(ec_gen);
685  if (ec_order)
686  BN_free(ec_order);
687  if (ec_cofactor)
688  BN_free(ec_cofactor);
689  if (buffer)
690  OPENSSL_free(buffer);
691  if (in != NULL)
692  BIO_free(in);
693  if (out != NULL)
694  BIO_free_all(out);
695  if (group != NULL)
696  EC_GROUP_free(group);
697  apps_shutdown();
698  OPENSSL_EXIT(ret);
699 }
700 
701 static int ecparam_print_var(BIO *out, BIGNUM *in, const char *var,
702  int len, unsigned char *buffer)
703  {
704  BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
705  if (BN_is_zero(in))
706  BIO_printf(out, "\n\t0x00");
707  else
708  {
709  int i, l;
710 
711  l = BN_bn2bin(in, buffer);
712  for (i=0; i<l-1; i++)
713  {
714  if ((i%12) == 0)
715  BIO_printf(out, "\n\t");
716  BIO_printf(out, "0x%02X,", buffer[i]);
717  }
718  if ((i%12) == 0)
719  BIO_printf(out, "\n\t");
720  BIO_printf(out, "0x%02X", buffer[i]);
721  }
722  BIO_printf(out, "\n\t};\n\n");
723  return 1;
724  }
725 #else /* !OPENSSL_NO_EC */
726 
727 # if PEDANTIC
728 static void *dummy=&dummy;
729 # endif
730 
731 #endif
Generated on Thu Jan 10 2013 09:53:32 for OpenSSL by   doxygen 1.8.2