3 * Written by Nils Larsch for the OpenSSL project.
5 /* ====================================================================
6 * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
58 /* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
61 * Portions of the attached software ("Contribution") are developed by
62 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
64 * The Contribution is licensed pursuant to the OpenSSL open source
65 * license provided above.
67 * The elliptic curve binary polynomial software is originally written by
68 * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
72 #include <openssl/opensslconf.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>
88 # define PROG ecparam_main
91 * -inform arg - input format - default PEM (DER or PEM)
92 * -outform arg - output format - default PEM
93 * -in arg - input file - default stdin
94 * -out arg - output file - default stdout
95 * -noout - do not print the ec parameter
96 * -text - print the ec parameters in text form
97 * -check - validate the ec parameters
98 * -C - print a 'C' function creating the parameters
99 * -name arg - use the ec parameters with 'short name' name
100 * -list_curves - prints a list of all currently available curve 'short names'
101 * -conv_form arg - specifies the point conversion form
102 * - possible values: compressed
103 * uncompressed (default)
105 * -param_enc arg - specifies the way the ec parameters are encoded
106 * in the asn1 der encoding
107 * possible values: named_curve (default)
109 * -no_seed - if 'explicit' parameters are chosen do not use the seed
110 * -genkey - generate ec key
111 * -rand file - files to use for random number input
112 * -engine e - use engine e, possibly a hardware device
115 static int ecparam_print_var(BIO *, BIGNUM *, const char *, int,
118 int MAIN(int, char **);
120 int MAIN(int argc, char **argv)
122 EC_GROUP *group = NULL;
123 point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
125 int asn1_flag = OPENSSL_EC_NAMED_CURVE;
126 int new_asn1_flag = 0;
127 char *curve_name = NULL, *inrand = NULL;
128 int list_curves = 0, no_seed = 0, check = 0,
129 badops = 0, text = 0, i, need_rand = 0, genkey = 0;
130 char *infile = NULL, *outfile = NULL, *prog;
131 BIO *in = NULL, *out = NULL;
132 int informat, outformat, noout = 0, C = 0, ret = 1;
134 # ifndef OPENSSL_NO_ENGINE
138 BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL,
139 *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
140 unsigned char *buffer = NULL;
145 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
146 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
148 if (!load_config(bio_err, NULL))
151 informat = FORMAT_PEM;
152 outformat = FORMAT_PEM;
158 if (strcmp(*argv, "-inform") == 0) {
161 informat = str2fmt(*(++argv));
162 } else if (strcmp(*argv, "-outform") == 0) {
165 outformat = str2fmt(*(++argv));
166 } else if (strcmp(*argv, "-in") == 0) {
170 } else if (strcmp(*argv, "-out") == 0) {
174 } else if (strcmp(*argv, "-text") == 0)
176 else if (strcmp(*argv, "-C") == 0)
178 else if (strcmp(*argv, "-check") == 0)
180 else if (strcmp(*argv, "-name") == 0) {
183 curve_name = *(++argv);
184 } else if (strcmp(*argv, "-list_curves") == 0)
186 else if (strcmp(*argv, "-conv_form") == 0) {
191 if (strcmp(*argv, "compressed") == 0)
192 form = POINT_CONVERSION_COMPRESSED;
193 else if (strcmp(*argv, "uncompressed") == 0)
194 form = POINT_CONVERSION_UNCOMPRESSED;
195 else if (strcmp(*argv, "hybrid") == 0)
196 form = POINT_CONVERSION_HYBRID;
199 } else if (strcmp(*argv, "-param_enc") == 0) {
204 if (strcmp(*argv, "named_curve") == 0)
205 asn1_flag = OPENSSL_EC_NAMED_CURVE;
206 else if (strcmp(*argv, "explicit") == 0)
210 } else if (strcmp(*argv, "-no_seed") == 0)
212 else if (strcmp(*argv, "-noout") == 0)
214 else if (strcmp(*argv, "-genkey") == 0) {
217 } else if (strcmp(*argv, "-rand") == 0) {
222 } else if (strcmp(*argv, "-engine") == 0) {
227 BIO_printf(bio_err, "unknown option %s\n", *argv);
237 BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
238 BIO_printf(bio_err, "where options are\n");
239 BIO_printf(bio_err, " -inform arg input format - "
240 "default PEM (DER or PEM)\n");
241 BIO_printf(bio_err, " -outform arg output format - "
243 BIO_printf(bio_err, " -in arg input file - "
245 BIO_printf(bio_err, " -out arg output file - "
247 BIO_printf(bio_err, " -noout do not print the "
249 BIO_printf(bio_err, " -text print the ec "
250 "parameters in text form\n");
251 BIO_printf(bio_err, " -check validate the ec "
253 BIO_printf(bio_err, " -C print a 'C' "
254 "function creating the parameters\n");
255 BIO_printf(bio_err, " -name arg use the "
256 "ec parameters with 'short name' name\n");
257 BIO_printf(bio_err, " -list_curves prints a list of "
258 "all currently available curve 'short names'\n");
259 BIO_printf(bio_err, " -conv_form arg specifies the "
260 "point conversion form \n");
261 BIO_printf(bio_err, " possible values:"
263 BIO_printf(bio_err, " "
264 " uncompressed (default)\n");
265 BIO_printf(bio_err, " "
267 BIO_printf(bio_err, " -param_enc arg specifies the way"
268 " the ec parameters are encoded\n");
269 BIO_printf(bio_err, " in the asn1 der "
271 BIO_printf(bio_err, " possible values:"
272 " named_curve (default)\n");
273 BIO_printf(bio_err, " "
275 BIO_printf(bio_err, " -no_seed if 'explicit'"
276 " parameters are chosen do not" " use the seed\n");
277 BIO_printf(bio_err, " -genkey generate ec" " key\n");
278 BIO_printf(bio_err, " -rand file files to use for"
279 " random number input\n");
280 BIO_printf(bio_err, " -engine e use engine e, "
281 "possibly a hardware device\n");
285 ERR_load_crypto_strings();
287 in = BIO_new(BIO_s_file());
288 out = BIO_new(BIO_s_file());
289 if ((in == NULL) || (out == NULL)) {
290 ERR_print_errors(bio_err);
295 BIO_set_fp(in, stdin, BIO_NOCLOSE);
297 if (BIO_read_filename(in, infile) <= 0) {
302 if (outfile == NULL) {
303 BIO_set_fp(out, stdout, BIO_NOCLOSE);
304 # ifdef OPENSSL_SYS_VMS
306 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
307 out = BIO_push(tmpbio, out);
311 if (BIO_write_filename(out, outfile) <= 0) {
317 # ifndef OPENSSL_NO_ENGINE
318 e = setup_engine(bio_err, engine, 0);
322 EC_builtin_curve *curves = NULL;
326 crv_len = EC_get_builtin_curves(NULL, 0);
328 curves = OPENSSL_malloc((int)(sizeof(EC_builtin_curve) * crv_len));
333 if (!EC_get_builtin_curves(curves, crv_len)) {
334 OPENSSL_free(curves);
338 for (n = 0; n < crv_len; n++) {
341 comment = curves[n].comment;
342 sname = OBJ_nid2sn(curves[n].nid);
344 comment = "CURVE DESCRIPTION NOT AVAILABLE";
348 BIO_printf(out, " %-10s: ", sname);
349 BIO_printf(out, "%s\n", comment);
352 OPENSSL_free(curves);
357 if (curve_name != NULL) {
361 * workaround for the SECG curve names secp192r1 and secp256r1 (which
362 * are the same as the curves prime192v1 and prime256v1 defined in
365 if (!strcmp(curve_name, "secp192r1")) {
366 BIO_printf(bio_err, "using curve name prime192v1 "
367 "instead of secp192r1\n");
368 nid = NID_X9_62_prime192v1;
369 } else if (!strcmp(curve_name, "secp256r1")) {
370 BIO_printf(bio_err, "using curve name prime256v1 "
371 "instead of secp256r1\n");
372 nid = NID_X9_62_prime256v1;
374 nid = OBJ_sn2nid(curve_name);
377 nid = EC_curve_nist2nid(curve_name);
380 BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
384 group = EC_GROUP_new_by_curve_name(nid);
386 BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
389 EC_GROUP_set_asn1_flag(group, asn1_flag);
390 EC_GROUP_set_point_conversion_form(group, form);
391 } else if (informat == FORMAT_ASN1) {
392 group = d2i_ECPKParameters_bio(in, NULL);
393 } else if (informat == FORMAT_PEM) {
394 group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
396 BIO_printf(bio_err, "bad input format specified\n");
401 BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
402 ERR_print_errors(bio_err);
407 EC_GROUP_set_point_conversion_form(group, form);
410 EC_GROUP_set_asn1_flag(group, asn1_flag);
413 EC_GROUP_set_seed(group, NULL, 0);
417 if (!ECPKParameters_print(out, group, 0))
422 BIO_printf(bio_err, "checking elliptic curve parameters: ");
423 if (!EC_GROUP_check(group, NULL)) {
424 BIO_printf(bio_err, "failed\n");
425 ERR_print_errors(bio_err);
428 BIO_printf(bio_err, "ok\n");
433 size_t buf_len = 0, tmp_len = 0;
434 const EC_POINT *point;
435 int is_prime, len = 0;
436 const EC_METHOD *meth = EC_GROUP_method_of(group);
438 if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
439 (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
440 (ec_order = BN_new()) == NULL ||
441 (ec_cofactor = BN_new()) == NULL) {
442 perror("OPENSSL_malloc");
446 is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
449 if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, ec_b, NULL))
456 if ((point = EC_GROUP_get0_generator(group)) == NULL)
458 if (!EC_POINT_point2bn(group, point,
459 EC_GROUP_get_point_conversion_form(group),
462 if (!EC_GROUP_get_order(group, ec_order, NULL))
464 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
467 if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
470 len = BN_num_bits(ec_order);
472 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
474 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
476 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
478 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
480 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
482 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
485 buffer = (unsigned char *)OPENSSL_malloc(buf_len);
487 if (buffer == NULL) {
488 perror("OPENSSL_malloc");
492 ecparam_print_var(out, ec_p, "ec_p", len, buffer);
493 ecparam_print_var(out, ec_a, "ec_a", len, buffer);
494 ecparam_print_var(out, ec_b, "ec_b", len, buffer);
495 ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
496 ecparam_print_var(out, ec_order, "ec_order", len, buffer);
497 ecparam_print_var(out, ec_cofactor, "ec_cofactor", len, buffer);
499 BIO_printf(out, "\n\n");
501 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
502 BIO_printf(out, "\tint ok=0;\n");
503 BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
504 BIO_printf(out, "\tEC_POINT *point = NULL;\n");
505 BIO_printf(out, "\tBIGNUM *tmp_1 = NULL, *tmp_2 = NULL, "
506 "*tmp_3 = NULL;\n\n");
507 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
508 "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
509 "goto err;\n", len, len);
510 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
511 "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
512 "goto err;\n", len, len);
513 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
514 "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
515 "goto err;\n", len, len);
517 BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
518 "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
519 "\n\t\tgoto err;\n\n");
524 BIO_printf(out, "\t/* build generator */\n");
525 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
526 "sizeof(ec_gen_%d), tmp_1)) == NULL)"
527 "\n\t\tgoto err;\n", len, len);
528 BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
530 BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
531 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
532 "sizeof(ec_order_%d), tmp_2)) == NULL)"
533 "\n\t\tgoto err;\n", len, len);
534 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
535 "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
536 "\n\t\tgoto err;\n", len, len);
537 BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
538 " tmp_2, tmp_3))\n\t\tgoto err;\n");
539 BIO_printf(out, "\n\tok=1;\n");
540 BIO_printf(out, "err:\n");
541 BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
542 BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
543 BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
544 BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
545 BIO_printf(out, "\tif (!ok)\n");
546 BIO_printf(out, "\t\t{\n");
547 BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
548 BIO_printf(out, "\t\tgroup = NULL;\n");
549 BIO_printf(out, "\t\t}\n");
550 BIO_printf(out, "\treturn(group);\n\t}\n");
554 if (outformat == FORMAT_ASN1)
555 i = i2d_ECPKParameters_bio(out, group);
556 else if (outformat == FORMAT_PEM)
557 i = PEM_write_bio_ECPKParameters(out, group);
559 BIO_printf(bio_err, "bad output format specified for"
564 BIO_printf(bio_err, "unable to write elliptic "
565 "curve parameters\n");
566 ERR_print_errors(bio_err);
572 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
574 BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
575 app_RAND_load_files(inrand));
579 EC_KEY *eckey = EC_KEY_new();
586 if (EC_KEY_set_group(eckey, group) == 0)
589 if (!EC_KEY_generate_key(eckey)) {
593 if (outformat == FORMAT_ASN1)
594 i = i2d_ECPrivateKey_bio(out, eckey);
595 else if (outformat == FORMAT_PEM)
596 i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
597 NULL, 0, NULL, NULL);
599 BIO_printf(bio_err, "bad output format specified "
608 app_RAND_write_file(NULL, bio_err);
623 BN_free(ec_cofactor);
625 OPENSSL_free(buffer);
627 EC_GROUP_free(group);
628 # ifndef OPENSSL_NO_ENGINE
640 static int ecparam_print_var(BIO *out, BIGNUM *in, const char *var,
641 int len, unsigned char *buffer)
643 BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
645 BIO_printf(out, "\n\t0x00");
649 l = BN_bn2bin(in, buffer);
650 for (i = 0; i < l - 1; i++) {
652 BIO_printf(out, "\n\t");
653 BIO_printf(out, "0x%02X,", buffer[i]);
656 BIO_printf(out, "\n\t");
657 BIO_printf(out, "0x%02X", buffer[i]);
659 BIO_printf(out, "\n\t};\n\n");
662 #else /* !OPENSSL_NO_EC */
665 static void *dummy = &dummy;