Annotation of src/usr.bin/openssl/ecparam.c, Revision 1.14
1.14 ! doug 1: /* $OpenBSD: ecparam.c,v 1.13 2015/09/11 14:30:23 bcook Exp $ */
1.1 jsing 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: * openssl-core@openssl.org.
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: * (eay@cryptsoft.com). This product includes software written by Tim
55: * Hudson (tjh@cryptsoft.com).
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:
74: #ifndef OPENSSL_NO_EC
75:
76: #include <stdio.h>
77: #include <stdlib.h>
78: #include <string.h>
79: #include <time.h>
80:
81: #include "apps.h"
82:
83: #include <openssl/bio.h>
84: #include <openssl/bn.h>
85: #include <openssl/ec.h>
86: #include <openssl/err.h>
87: #include <openssl/pem.h>
88: #include <openssl/x509.h>
89:
1.3 jsing 90: static int ecparam_print_var(BIO *, BIGNUM *, const char *, int,
91: unsigned char *);
92:
93: static struct {
94: int C;
95: int asn1_flag;
96: int check;
97: char *curve_name;
98: point_conversion_form_t form;
99: int genkey;
100: char *infile;
101: int informat;
102: int list_curves;
103: int new_asn1_flag;
104: int new_form;
105: int no_seed;
106: int noout;
107: char *outfile;
108: int outformat;
109: int text;
110: } ecparam_config;
111:
112: static int
1.7 jsing 113: ecparam_opt_form(char *arg)
1.3 jsing 114: {
115: if (strcmp(arg, "compressed") == 0)
116: ecparam_config.form = POINT_CONVERSION_COMPRESSED;
117: else if (strcmp(arg, "uncompressed") == 0)
118: ecparam_config.form = POINT_CONVERSION_UNCOMPRESSED;
119: else if (strcmp(arg, "hybrid") == 0)
120: ecparam_config.form = POINT_CONVERSION_HYBRID;
121: else
122: return (1);
123:
124: ecparam_config.new_form = 1;
125: return (0);
126: }
1.1 jsing 127:
1.3 jsing 128: static int
1.7 jsing 129: ecparam_opt_enctype(char *arg)
1.3 jsing 130: {
131: if (strcmp(arg, "explicit") == 0)
132: ecparam_config.asn1_flag = 0;
133: else if (strcmp(arg, "named_curve") == 0)
134: ecparam_config.asn1_flag = OPENSSL_EC_NAMED_CURVE;
135: else
136: return (1);
137:
138: ecparam_config.new_asn1_flag = 1;
139: return (0);
140: }
141:
142: struct option ecparam_options[] = {
143: {
144: .name = "C",
145: .desc = "Convert the EC parameters into C code",
146: .type = OPTION_FLAG,
147: .opt.flag = &ecparam_config.C,
148: },
149: {
150: .name = "check",
151: .desc = "Validate the elliptic curve parameters",
152: .type = OPTION_FLAG,
153: .opt.flag = &ecparam_config.check,
154: },
155: {
156: .name = "conv_form",
157: .argname = "form",
158: .desc = "Specify point conversion form:\n"
159: " compressed, uncompressed (default), hybrid",
160: .type = OPTION_ARG_FUNC,
1.7 jsing 161: .opt.argfunc = ecparam_opt_form,
1.3 jsing 162: },
163: {
164: .name = "genkey",
165: .desc = "Generate an EC private key using the specified "
166: "parameters",
167: .type = OPTION_FLAG,
168: .opt.flag = &ecparam_config.genkey,
169: },
170: {
171: .name = "in",
172: .argname = "file",
173: .desc = "Input file to read parameters from (default stdin)",
174: .type = OPTION_ARG,
175: .opt.arg = &ecparam_config.infile,
176: },
177: {
178: .name = "inform",
179: .argname = "format",
180: .desc = "Input format (DER or PEM)",
181: .type = OPTION_ARG_FORMAT,
182: .opt.value = &ecparam_config.informat,
183: },
184: {
185: .name = "list_curves",
186: .desc = "Print list of all currently implemented EC "
187: "parameter names",
188: .type = OPTION_FLAG,
189: .opt.flag = &ecparam_config.list_curves,
190: },
191: {
192: .name = "name",
193: .argname = "curve",
194: .desc = "Use the EC parameters with the specified name",
195: .type = OPTION_ARG,
196: .opt.arg = &ecparam_config.curve_name,
197: },
198: {
199: .name = "no_seed",
200: .desc = "Do not output seed with explicit parameter encoding",
201: .type = OPTION_FLAG,
202: .opt.flag = &ecparam_config.no_seed,
203: },
204: {
205: .name = "noout",
206: .desc = "Do not output encoded version of EC parameters",
207: .type = OPTION_FLAG,
208: .opt.flag = &ecparam_config.noout,
209: },
210: {
211: .name = "out",
212: .argname = "file",
213: .desc = "Output file to write parameters to (default stdout)",
214: .type = OPTION_ARG,
215: .opt.arg = &ecparam_config.outfile,
216: },
217: {
218: .name = "outform",
219: .argname = "format",
220: .desc = "Output format (DER or PEM)",
221: .type = OPTION_ARG_FORMAT,
222: .opt.value = &ecparam_config.outformat,
223: },
224: {
225: .name = "param_enc",
226: .argname = "type",
227: .desc = "Specify EC parameter ASN.1 encoding type:\n"
228: " explicit, named_curve (default)",
229: .type = OPTION_ARG_FUNC,
1.7 jsing 230: .opt.argfunc = ecparam_opt_enctype,
1.3 jsing 231: },
232: {
233: .name = "text",
234: .desc = "Print out the EC parameters in human readable form",
235: .type = OPTION_FLAG,
236: .opt.flag = &ecparam_config.text,
237: },
1.4 bcook 238: {NULL},
1.3 jsing 239: };
1.1 jsing 240:
1.3 jsing 241: static void
242: ecparam_usage(void)
243: {
244: fprintf(stderr, "usage: ecparam [-C] [-check] [-conv_form arg] "
1.13 bcook 245: " [-genkey]\n"
1.3 jsing 246: " [-in file] [-inform DER | PEM] [-list_curves] [-name arg]\n"
247: " [-no_seed] [-noout] [-out file] [-outform DER | PEM]\n"
248: " [-param_enc arg] [-text]\n\n");
249: options_usage(ecparam_options);
250: }
1.1 jsing 251:
252: int
253: ecparam_main(int argc, char **argv)
254: {
1.3 jsing 255: BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL, *ec_gen = NULL;
256: BIGNUM *ec_order = NULL, *ec_cofactor = NULL;
1.1 jsing 257: EC_GROUP *group = NULL;
1.3 jsing 258: unsigned char *buffer = NULL;
1.1 jsing 259: BIO *in = NULL, *out = NULL;
1.3 jsing 260: int i, ret = 1;
1.14 ! doug 261:
! 262: if (single_execution) {
! 263: if (pledge("stdio rpath wpath cpath", NULL) == -1)
! 264: perror("pledge");
! 265: }
1.1 jsing 266:
1.3 jsing 267: memset(&ecparam_config, 0, sizeof(ecparam_config));
268: ecparam_config.asn1_flag = OPENSSL_EC_NAMED_CURVE;
269: ecparam_config.form = POINT_CONVERSION_UNCOMPRESSED;
270: ecparam_config.informat = FORMAT_PEM;
271: ecparam_config.outformat = FORMAT_PEM;
1.1 jsing 272:
1.8 jsing 273: if (options_parse(argc, argv, ecparam_options, NULL, NULL) != 0) {
1.3 jsing 274: ecparam_usage();
1.1 jsing 275: goto end;
276: }
277:
278: in = BIO_new(BIO_s_file());
279: out = BIO_new(BIO_s_file());
280: if ((in == NULL) || (out == NULL)) {
281: ERR_print_errors(bio_err);
282: goto end;
283: }
1.3 jsing 284: if (ecparam_config.infile == NULL)
1.1 jsing 285: BIO_set_fp(in, stdin, BIO_NOCLOSE);
286: else {
1.3 jsing 287: if (BIO_read_filename(in, ecparam_config.infile) <= 0) {
288: perror(ecparam_config.infile);
1.1 jsing 289: goto end;
290: }
291: }
1.3 jsing 292: if (ecparam_config.outfile == NULL) {
1.1 jsing 293: BIO_set_fp(out, stdout, BIO_NOCLOSE);
294: } else {
1.3 jsing 295: if (BIO_write_filename(out, ecparam_config.outfile) <= 0) {
296: perror(ecparam_config.outfile);
1.1 jsing 297: goto end;
298: }
299: }
300:
1.3 jsing 301: if (ecparam_config.list_curves) {
1.1 jsing 302: EC_builtin_curve *curves = NULL;
303: size_t crv_len = 0;
304: size_t n = 0;
305:
306: crv_len = EC_get_builtin_curves(NULL, 0);
307:
308: curves = reallocarray(NULL, crv_len, sizeof(EC_builtin_curve));
309: if (curves == NULL)
310: goto end;
311:
312: if (!EC_get_builtin_curves(curves, crv_len)) {
313: free(curves);
314: goto end;
315: }
316: for (n = 0; n < crv_len; n++) {
317: const char *comment;
318: const char *sname;
319: comment = curves[n].comment;
320: sname = OBJ_nid2sn(curves[n].nid);
321: if (comment == NULL)
322: comment = "CURVE DESCRIPTION NOT AVAILABLE";
323: if (sname == NULL)
324: sname = "";
325:
326: BIO_printf(out, " %-10s: ", sname);
327: BIO_printf(out, "%s\n", comment);
328: }
329:
330: free(curves);
331: ret = 0;
332: goto end;
333: }
1.3 jsing 334: if (ecparam_config.curve_name != NULL) {
1.1 jsing 335: int nid;
336:
337: /*
338: * workaround for the SECG curve names secp192r1 and
339: * secp256r1 (which are the same as the curves prime192v1 and
340: * prime256v1 defined in X9.62)
341: */
1.3 jsing 342: if (!strcmp(ecparam_config.curve_name, "secp192r1")) {
1.1 jsing 343: BIO_printf(bio_err, "using curve name prime192v1 "
344: "instead of secp192r1\n");
345: nid = NID_X9_62_prime192v1;
1.3 jsing 346: } else if (!strcmp(ecparam_config.curve_name, "secp256r1")) {
1.1 jsing 347: BIO_printf(bio_err, "using curve name prime256v1 "
348: "instead of secp256r1\n");
349: nid = NID_X9_62_prime256v1;
350: } else
1.3 jsing 351: nid = OBJ_sn2nid(ecparam_config.curve_name);
1.9 jsing 352:
353: if (nid == 0)
354: nid = EC_curve_nist2nid(ecparam_config.curve_name);
1.1 jsing 355:
356: if (nid == 0) {
357: BIO_printf(bio_err, "unknown curve name (%s)\n",
1.3 jsing 358: ecparam_config.curve_name);
1.1 jsing 359: goto end;
360: }
361: group = EC_GROUP_new_by_curve_name(nid);
362: if (group == NULL) {
363: BIO_printf(bio_err, "unable to create curve (%s)\n",
1.3 jsing 364: ecparam_config.curve_name);
1.1 jsing 365: goto end;
366: }
1.3 jsing 367: EC_GROUP_set_asn1_flag(group, ecparam_config.asn1_flag);
368: EC_GROUP_set_point_conversion_form(group, ecparam_config.form);
369: } else if (ecparam_config.informat == FORMAT_ASN1) {
1.1 jsing 370: group = d2i_ECPKParameters_bio(in, NULL);
1.3 jsing 371: } else if (ecparam_config.informat == FORMAT_PEM) {
1.1 jsing 372: group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
373: } else {
374: BIO_printf(bio_err, "bad input format specified\n");
375: goto end;
376: }
377:
378: if (group == NULL) {
379: BIO_printf(bio_err,
380: "unable to load elliptic curve parameters\n");
381: ERR_print_errors(bio_err);
382: goto end;
383: }
1.3 jsing 384: if (ecparam_config.new_form)
385: EC_GROUP_set_point_conversion_form(group, ecparam_config.form);
1.1 jsing 386:
1.3 jsing 387: if (ecparam_config.new_asn1_flag)
388: EC_GROUP_set_asn1_flag(group, ecparam_config.asn1_flag);
1.1 jsing 389:
1.3 jsing 390: if (ecparam_config.no_seed)
1.1 jsing 391: EC_GROUP_set_seed(group, NULL, 0);
1.3 jsing 392:
393: if (ecparam_config.text) {
1.1 jsing 394: if (!ECPKParameters_print(out, group, 0))
395: goto end;
396: }
1.3 jsing 397: if (ecparam_config.check) {
1.1 jsing 398: BIO_printf(bio_err, "checking elliptic curve parameters: ");
399: if (!EC_GROUP_check(group, NULL)) {
400: BIO_printf(bio_err, "failed\n");
401: ERR_print_errors(bio_err);
402: } else
403: BIO_printf(bio_err, "ok\n");
404:
405: }
1.3 jsing 406: if (ecparam_config.C) {
1.1 jsing 407: size_t buf_len = 0, tmp_len = 0;
408: const EC_POINT *point;
409: int is_prime, len = 0;
410: const EC_METHOD *meth = EC_GROUP_method_of(group);
411:
412: if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
413: (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
414: (ec_order = BN_new()) == NULL ||
415: (ec_cofactor = BN_new()) == NULL) {
416: perror("malloc");
417: goto end;
418: }
419: is_prime = (EC_METHOD_get_field_type(meth) ==
420: NID_X9_62_prime_field);
421:
422: if (is_prime) {
423: if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a,
1.3 jsing 424: ec_b, NULL))
1.1 jsing 425: goto end;
426: } else {
1.5 jsing 427: if (!EC_GROUP_get_curve_GF2m(group, ec_p, ec_a,
428: ec_b, NULL))
429: goto end;
1.1 jsing 430: }
431:
432: if ((point = EC_GROUP_get0_generator(group)) == NULL)
433: goto end;
434: if (!EC_POINT_point2bn(group, point,
435: EC_GROUP_get_point_conversion_form(group), ec_gen,
436: NULL))
437: goto end;
438: if (!EC_GROUP_get_order(group, ec_order, NULL))
439: goto end;
440: if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
441: goto end;
442:
443: len = BN_num_bits(ec_order);
444:
445: if ((tmp_len = (size_t) BN_num_bytes(ec_p)) > buf_len)
446: buf_len = tmp_len;
447: if ((tmp_len = (size_t) BN_num_bytes(ec_a)) > buf_len)
448: buf_len = tmp_len;
449: if ((tmp_len = (size_t) BN_num_bytes(ec_b)) > buf_len)
450: buf_len = tmp_len;
451: if ((tmp_len = (size_t) BN_num_bytes(ec_gen)) > buf_len)
452: buf_len = tmp_len;
453: if ((tmp_len = (size_t) BN_num_bytes(ec_order)) > buf_len)
454: buf_len = tmp_len;
455: if ((tmp_len = (size_t) BN_num_bytes(ec_cofactor)) > buf_len)
456: buf_len = tmp_len;
457:
458: buffer = malloc(buf_len);
459:
460: if (buffer == NULL) {
461: perror("malloc");
462: goto end;
463: }
464: ecparam_print_var(out, ec_p, "ec_p", len, buffer);
465: ecparam_print_var(out, ec_a, "ec_a", len, buffer);
466: ecparam_print_var(out, ec_b, "ec_b", len, buffer);
467: ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
468: ecparam_print_var(out, ec_order, "ec_order", len, buffer);
469: ecparam_print_var(out, ec_cofactor, "ec_cofactor", len,
470: buffer);
471:
472: BIO_printf(out, "\n\n");
473:
474: BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
475: BIO_printf(out, "\tint ok=0;\n");
476: BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
477: BIO_printf(out, "\tEC_POINT *point = NULL;\n");
478: BIO_printf(out, "\tBIGNUM *tmp_1 = NULL, *tmp_2 = NULL, "
479: "*tmp_3 = NULL;\n\n");
480: BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
481: "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
482: "goto err;\n", len, len);
483: BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
484: "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
485: "goto err;\n", len, len);
486: BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
487: "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
488: "goto err;\n", len, len);
489: if (is_prime) {
490: BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
491: "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
492: "\n\t\tgoto err;\n\n");
493: } else {
1.5 jsing 494: BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
495: "GF2m(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
496: "\n\t\tgoto err;\n\n");
1.1 jsing 497: }
498: BIO_printf(out, "\t/* build generator */\n");
499: BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
500: "sizeof(ec_gen_%d), tmp_1)) == NULL)"
501: "\n\t\tgoto err;\n", len, len);
502: BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
503: "NULL, NULL);\n");
504: BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
505: BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
506: "sizeof(ec_order_%d), tmp_2)) == NULL)"
507: "\n\t\tgoto err;\n", len, len);
508: BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
509: "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
510: "\n\t\tgoto err;\n", len, len);
511: BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
512: " tmp_2, tmp_3))\n\t\tgoto err;\n");
513: BIO_printf(out, "\n\tok=1;\n");
514: BIO_printf(out, "err:\n");
515: BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
516: BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
517: BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
518: BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
519: BIO_printf(out, "\tif (!ok)\n");
520: BIO_printf(out, "\t\t{\n");
521: BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
522: BIO_printf(out, "\t\tgroup = NULL;\n");
523: BIO_printf(out, "\t\t}\n");
524: BIO_printf(out, "\treturn(group);\n\t}\n");
525: }
1.3 jsing 526: if (!ecparam_config.noout) {
527: if (ecparam_config.outformat == FORMAT_ASN1)
1.1 jsing 528: i = i2d_ECPKParameters_bio(out, group);
1.3 jsing 529: else if (ecparam_config.outformat == FORMAT_PEM)
1.1 jsing 530: i = PEM_write_bio_ECPKParameters(out, group);
531: else {
532: BIO_printf(bio_err, "bad output format specified for"
533: " outfile\n");
534: goto end;
535: }
536: if (!i) {
537: BIO_printf(bio_err, "unable to write elliptic "
538: "curve parameters\n");
539: ERR_print_errors(bio_err);
540: goto end;
541: }
542: }
1.3 jsing 543: if (ecparam_config.genkey) {
1.1 jsing 544: EC_KEY *eckey = EC_KEY_new();
545:
546: if (eckey == NULL)
547: goto end;
548:
549: if (EC_KEY_set_group(eckey, group) == 0) {
550: EC_KEY_free(eckey);
551: goto end;
552: }
553:
554: if (!EC_KEY_generate_key(eckey)) {
555: EC_KEY_free(eckey);
556: goto end;
557: }
1.3 jsing 558: if (ecparam_config.outformat == FORMAT_ASN1)
1.1 jsing 559: i = i2d_ECPrivateKey_bio(out, eckey);
1.3 jsing 560: else if (ecparam_config.outformat == FORMAT_PEM)
1.1 jsing 561: i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
562: NULL, 0, NULL, NULL);
563: else {
564: BIO_printf(bio_err, "bad output format specified "
565: "for outfile\n");
566: EC_KEY_free(eckey);
567: goto end;
568: }
569: EC_KEY_free(eckey);
570: }
571: ret = 0;
1.6 jsing 572:
1.1 jsing 573: end:
1.6 jsing 574: BN_free(ec_p);
575: BN_free(ec_a);
576: BN_free(ec_b);
577: BN_free(ec_gen);
578: BN_free(ec_order);
579: BN_free(ec_cofactor);
580:
1.1 jsing 581: free(buffer);
1.6 jsing 582:
1.1 jsing 583: BIO_free(in);
1.6 jsing 584: BIO_free_all(out);
585: EC_GROUP_free(group);
1.1 jsing 586:
587: return (ret);
588: }
589:
590: static int
591: ecparam_print_var(BIO * out, BIGNUM * in, const char *var,
592: int len, unsigned char *buffer)
593: {
594: BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
595: if (BN_is_zero(in))
596: BIO_printf(out, "\n\t0x00");
597: else {
598: int i, l;
599:
600: l = BN_bn2bin(in, buffer);
601: for (i = 0; i < l - 1; i++) {
602: if ((i % 12) == 0)
603: BIO_printf(out, "\n\t");
604: BIO_printf(out, "0x%02X,", buffer[i]);
605: }
606: if ((i % 12) == 0)
607: BIO_printf(out, "\n\t");
608: BIO_printf(out, "0x%02X", buffer[i]);
609: }
610: BIO_printf(out, "\n\t};\n\n");
611: return 1;
612: }
613: #endif
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