Annotation of src/usr.bin/openssl/ecparam.c, Revision 1.23
1.23 ! tb 1: /* $OpenBSD: ecparam.c,v 1.22 2022/11/11 17:07:38 joshua 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>
1.19 tb 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;
1.23 ! tb 110: } cfg;
1.3 jsing 111:
112: static int
1.7 jsing 113: ecparam_opt_form(char *arg)
1.3 jsing 114: {
115: if (strcmp(arg, "compressed") == 0)
1.23 ! tb 116: cfg.form = POINT_CONVERSION_COMPRESSED;
1.3 jsing 117: else if (strcmp(arg, "uncompressed") == 0)
1.23 ! tb 118: cfg.form = POINT_CONVERSION_UNCOMPRESSED;
1.3 jsing 119: else if (strcmp(arg, "hybrid") == 0)
1.23 ! tb 120: cfg.form = POINT_CONVERSION_HYBRID;
1.3 jsing 121: else
122: return (1);
123:
1.23 ! tb 124: cfg.new_form = 1;
1.3 jsing 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)
1.23 ! tb 132: cfg.asn1_flag = 0;
1.3 jsing 133: else if (strcmp(arg, "named_curve") == 0)
1.23 ! tb 134: cfg.asn1_flag = OPENSSL_EC_NAMED_CURVE;
1.3 jsing 135: else
136: return (1);
137:
1.23 ! tb 138: cfg.new_asn1_flag = 1;
1.3 jsing 139: return (0);
140: }
141:
1.18 guenther 142: static const struct option ecparam_options[] = {
1.3 jsing 143: {
144: .name = "C",
145: .desc = "Convert the EC parameters into C code",
146: .type = OPTION_FLAG,
1.23 ! tb 147: .opt.flag = &cfg.C,
1.3 jsing 148: },
149: {
150: .name = "check",
151: .desc = "Validate the elliptic curve parameters",
152: .type = OPTION_FLAG,
1.23 ! tb 153: .opt.flag = &cfg.check,
1.3 jsing 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,
1.23 ! tb 168: .opt.flag = &cfg.genkey,
1.3 jsing 169: },
170: {
171: .name = "in",
172: .argname = "file",
173: .desc = "Input file to read parameters from (default stdin)",
174: .type = OPTION_ARG,
1.23 ! tb 175: .opt.arg = &cfg.infile,
1.3 jsing 176: },
177: {
178: .name = "inform",
179: .argname = "format",
180: .desc = "Input format (DER or PEM)",
181: .type = OPTION_ARG_FORMAT,
1.23 ! tb 182: .opt.value = &cfg.informat,
1.3 jsing 183: },
184: {
185: .name = "list_curves",
186: .desc = "Print list of all currently implemented EC "
187: "parameter names",
188: .type = OPTION_FLAG,
1.23 ! tb 189: .opt.flag = &cfg.list_curves,
1.3 jsing 190: },
191: {
192: .name = "name",
193: .argname = "curve",
194: .desc = "Use the EC parameters with the specified name",
195: .type = OPTION_ARG,
1.23 ! tb 196: .opt.arg = &cfg.curve_name,
1.3 jsing 197: },
198: {
199: .name = "no_seed",
200: .desc = "Do not output seed with explicit parameter encoding",
201: .type = OPTION_FLAG,
1.23 ! tb 202: .opt.flag = &cfg.no_seed,
1.3 jsing 203: },
204: {
205: .name = "noout",
206: .desc = "Do not output encoded version of EC parameters",
207: .type = OPTION_FLAG,
1.23 ! tb 208: .opt.flag = &cfg.noout,
1.3 jsing 209: },
210: {
211: .name = "out",
212: .argname = "file",
213: .desc = "Output file to write parameters to (default stdout)",
214: .type = OPTION_ARG,
1.23 ! tb 215: .opt.arg = &cfg.outfile,
1.3 jsing 216: },
217: {
218: .name = "outform",
219: .argname = "format",
220: .desc = "Output format (DER or PEM)",
221: .type = OPTION_ARG_FORMAT,
1.23 ! tb 222: .opt.value = &cfg.outformat,
1.3 jsing 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,
1.23 ! tb 236: .opt.flag = &cfg.text,
1.3 jsing 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:
1.22 joshua 262: if (pledge("stdio cpath wpath rpath", NULL) == -1) {
263: perror("pledge");
264: exit(1);
1.14 doug 265: }
1.1 jsing 266:
1.23 ! tb 267: memset(&cfg, 0, sizeof(cfg));
! 268: cfg.asn1_flag = OPENSSL_EC_NAMED_CURVE;
! 269: cfg.form = POINT_CONVERSION_UNCOMPRESSED;
! 270: cfg.informat = FORMAT_PEM;
! 271: cfg.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: }
1.23 ! tb 284: if (cfg.infile == NULL)
1.1 jsing 285: BIO_set_fp(in, stdin, BIO_NOCLOSE);
286: else {
1.23 ! tb 287: if (BIO_read_filename(in, cfg.infile) <= 0) {
! 288: perror(cfg.infile);
1.1 jsing 289: goto end;
290: }
291: }
1.23 ! tb 292: if (cfg.outfile == NULL) {
1.1 jsing 293: BIO_set_fp(out, stdout, BIO_NOCLOSE);
294: } else {
1.23 ! tb 295: if (BIO_write_filename(out, cfg.outfile) <= 0) {
! 296: perror(cfg.outfile);
1.1 jsing 297: goto end;
298: }
299: }
300:
1.23 ! tb 301: if (cfg.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: }
1.23 ! tb 334: if (cfg.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: */
1.23 ! tb 342: if (!strcmp(cfg.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;
1.23 ! tb 346: } else if (!strcmp(cfg.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
1.23 ! tb 351: nid = OBJ_sn2nid(cfg.curve_name);
1.9 jsing 352:
353: if (nid == 0)
1.23 ! tb 354: nid = EC_curve_nist2nid(cfg.curve_name);
1.1 jsing 355:
356: if (nid == 0) {
357: BIO_printf(bio_err, "unknown curve name (%s)\n",
1.23 ! tb 358: cfg.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",
1.23 ! tb 364: cfg.curve_name);
1.1 jsing 365: goto end;
366: }
1.23 ! tb 367: EC_GROUP_set_asn1_flag(group, cfg.asn1_flag);
! 368: EC_GROUP_set_point_conversion_form(group, cfg.form);
! 369: } else if (cfg.informat == FORMAT_ASN1) {
1.1 jsing 370: group = d2i_ECPKParameters_bio(in, NULL);
1.23 ! tb 371: } else if (cfg.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: }
1.23 ! tb 384: if (cfg.new_form)
! 385: EC_GROUP_set_point_conversion_form(group, cfg.form);
1.1 jsing 386:
1.23 ! tb 387: if (cfg.new_asn1_flag)
! 388: EC_GROUP_set_asn1_flag(group, cfg.asn1_flag);
1.1 jsing 389:
1.23 ! tb 390: if (cfg.no_seed)
1.1 jsing 391: EC_GROUP_set_seed(group, NULL, 0);
1.3 jsing 392:
1.23 ! tb 393: if (cfg.text) {
1.1 jsing 394: if (!ECPKParameters_print(out, group, 0))
395: goto end;
396: }
1.23 ! tb 397: if (cfg.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: }
1.23 ! tb 406: if (cfg.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:
1.21 tb 422: if (!EC_GROUP_get_curve(group, ec_p, ec_a, ec_b, NULL))
423: goto end;
1.1 jsing 424:
425: if ((point = EC_GROUP_get0_generator(group)) == NULL)
426: goto end;
427: if (!EC_POINT_point2bn(group, point,
428: EC_GROUP_get_point_conversion_form(group), ec_gen,
429: NULL))
430: goto end;
431: if (!EC_GROUP_get_order(group, ec_order, NULL))
432: goto end;
433: if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
434: goto end;
435:
436: len = BN_num_bits(ec_order);
437:
438: if ((tmp_len = (size_t) BN_num_bytes(ec_p)) > buf_len)
439: buf_len = tmp_len;
440: if ((tmp_len = (size_t) BN_num_bytes(ec_a)) > buf_len)
441: buf_len = tmp_len;
442: if ((tmp_len = (size_t) BN_num_bytes(ec_b)) > buf_len)
443: buf_len = tmp_len;
444: if ((tmp_len = (size_t) BN_num_bytes(ec_gen)) > buf_len)
445: buf_len = tmp_len;
446: if ((tmp_len = (size_t) BN_num_bytes(ec_order)) > buf_len)
447: buf_len = tmp_len;
448: if ((tmp_len = (size_t) BN_num_bytes(ec_cofactor)) > buf_len)
449: buf_len = tmp_len;
450:
451: buffer = malloc(buf_len);
452:
453: if (buffer == NULL) {
454: perror("malloc");
455: goto end;
456: }
457: ecparam_print_var(out, ec_p, "ec_p", len, buffer);
458: ecparam_print_var(out, ec_a, "ec_a", len, buffer);
459: ecparam_print_var(out, ec_b, "ec_b", len, buffer);
460: ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
461: ecparam_print_var(out, ec_order, "ec_order", len, buffer);
462: ecparam_print_var(out, ec_cofactor, "ec_cofactor", len,
463: buffer);
464:
465: BIO_printf(out, "\n\n");
466:
467: BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
468: BIO_printf(out, "\tint ok=0;\n");
469: BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
470: BIO_printf(out, "\tEC_POINT *point = NULL;\n");
471: BIO_printf(out, "\tBIGNUM *tmp_1 = NULL, *tmp_2 = NULL, "
472: "*tmp_3 = NULL;\n\n");
473: BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
474: "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
475: "goto err;\n", len, len);
476: BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
477: "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
478: "goto err;\n", len, len);
479: BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
480: "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
481: "goto err;\n", len, len);
482: if (is_prime) {
483: BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
484: "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
485: "\n\t\tgoto err;\n\n");
486: } else {
1.5 jsing 487: BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
488: "GF2m(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
489: "\n\t\tgoto err;\n\n");
1.1 jsing 490: }
491: BIO_printf(out, "\t/* build generator */\n");
492: BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
493: "sizeof(ec_gen_%d), tmp_1)) == NULL)"
494: "\n\t\tgoto err;\n", len, len);
495: BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
496: "NULL, NULL);\n");
497: BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
498: BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
499: "sizeof(ec_order_%d), tmp_2)) == NULL)"
500: "\n\t\tgoto err;\n", len, len);
501: BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
502: "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
503: "\n\t\tgoto err;\n", len, len);
504: BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
505: " tmp_2, tmp_3))\n\t\tgoto err;\n");
506: BIO_printf(out, "\n\tok=1;\n");
507: BIO_printf(out, "err:\n");
508: BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
509: BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
510: BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
511: BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
512: BIO_printf(out, "\tif (!ok)\n");
513: BIO_printf(out, "\t\t{\n");
514: BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
515: BIO_printf(out, "\t\tgroup = NULL;\n");
516: BIO_printf(out, "\t\t}\n");
517: BIO_printf(out, "\treturn(group);\n\t}\n");
518: }
1.23 ! tb 519: if (!cfg.noout) {
! 520: if (cfg.outformat == FORMAT_ASN1)
1.1 jsing 521: i = i2d_ECPKParameters_bio(out, group);
1.23 ! tb 522: else if (cfg.outformat == FORMAT_PEM)
1.1 jsing 523: i = PEM_write_bio_ECPKParameters(out, group);
524: else {
525: BIO_printf(bio_err, "bad output format specified for"
526: " outfile\n");
527: goto end;
528: }
529: if (!i) {
530: BIO_printf(bio_err, "unable to write elliptic "
531: "curve parameters\n");
532: ERR_print_errors(bio_err);
533: goto end;
534: }
535: }
1.23 ! tb 536: if (cfg.genkey) {
1.1 jsing 537: EC_KEY *eckey = EC_KEY_new();
538:
539: if (eckey == NULL)
540: goto end;
541:
542: if (EC_KEY_set_group(eckey, group) == 0) {
543: EC_KEY_free(eckey);
544: goto end;
545: }
546:
547: if (!EC_KEY_generate_key(eckey)) {
548: EC_KEY_free(eckey);
549: goto end;
550: }
1.23 ! tb 551: if (cfg.outformat == FORMAT_ASN1)
1.1 jsing 552: i = i2d_ECPrivateKey_bio(out, eckey);
1.23 ! tb 553: else if (cfg.outformat == FORMAT_PEM)
1.1 jsing 554: i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
555: NULL, 0, NULL, NULL);
556: else {
557: BIO_printf(bio_err, "bad output format specified "
558: "for outfile\n");
559: EC_KEY_free(eckey);
560: goto end;
561: }
562: EC_KEY_free(eckey);
563: }
564: ret = 0;
1.6 jsing 565:
1.17 jsing 566: end:
1.6 jsing 567: BN_free(ec_p);
568: BN_free(ec_a);
569: BN_free(ec_b);
570: BN_free(ec_gen);
571: BN_free(ec_order);
572: BN_free(ec_cofactor);
573:
1.1 jsing 574: free(buffer);
1.6 jsing 575:
1.1 jsing 576: BIO_free(in);
1.6 jsing 577: BIO_free_all(out);
578: EC_GROUP_free(group);
1.1 jsing 579:
580: return (ret);
581: }
582:
583: static int
584: ecparam_print_var(BIO * out, BIGNUM * in, const char *var,
585: int len, unsigned char *buffer)
586: {
587: BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
588: if (BN_is_zero(in))
589: BIO_printf(out, "\n\t0x00");
590: else {
591: int i, l;
592:
593: l = BN_bn2bin(in, buffer);
594: for (i = 0; i < l - 1; i++) {
595: if ((i % 12) == 0)
596: BIO_printf(out, "\n\t");
597: BIO_printf(out, "0x%02X,", buffer[i]);
598: }
599: if ((i % 12) == 0)
600: BIO_printf(out, "\n\t");
601: BIO_printf(out, "0x%02X", buffer[i]);
602: }
603: BIO_printf(out, "\n\t};\n\n");
604: return 1;
605: }
606: #endif
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