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;
135 BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL,
136 *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
137 unsigned char *buffer = NULL;
142 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
143 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
145 if (!load_config(bio_err, NULL))
148 informat = FORMAT_PEM;
149 outformat = FORMAT_PEM;
155 if (strcmp(*argv, "-inform") == 0) {
158 informat = str2fmt(*(++argv));
159 } else if (strcmp(*argv, "-outform") == 0) {
162 outformat = str2fmt(*(++argv));
163 } else if (strcmp(*argv, "-in") == 0) {
167 } else if (strcmp(*argv, "-out") == 0) {
171 } else if (strcmp(*argv, "-text") == 0)
173 else if (strcmp(*argv, "-C") == 0)
175 else if (strcmp(*argv, "-check") == 0)
177 else if (strcmp(*argv, "-name") == 0) {
180 curve_name = *(++argv);
181 } else if (strcmp(*argv, "-list_curves") == 0)
183 else if (strcmp(*argv, "-conv_form") == 0) {
188 if (strcmp(*argv, "compressed") == 0)
189 form = POINT_CONVERSION_COMPRESSED;
190 else if (strcmp(*argv, "uncompressed") == 0)
191 form = POINT_CONVERSION_UNCOMPRESSED;
192 else if (strcmp(*argv, "hybrid") == 0)
193 form = POINT_CONVERSION_HYBRID;
196 } else if (strcmp(*argv, "-param_enc") == 0) {
201 if (strcmp(*argv, "named_curve") == 0)
202 asn1_flag = OPENSSL_EC_NAMED_CURVE;
203 else if (strcmp(*argv, "explicit") == 0)
207 } else if (strcmp(*argv, "-no_seed") == 0)
209 else if (strcmp(*argv, "-noout") == 0)
211 else if (strcmp(*argv, "-genkey") == 0) {
214 } else if (strcmp(*argv, "-rand") == 0) {
219 } else if (strcmp(*argv, "-engine") == 0) {
224 BIO_printf(bio_err, "unknown option %s\n", *argv);
234 BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
235 BIO_printf(bio_err, "where options are\n");
236 BIO_printf(bio_err, " -inform arg input format - "
237 "default PEM (DER or PEM)\n");
238 BIO_printf(bio_err, " -outform arg output format - "
240 BIO_printf(bio_err, " -in arg input file - "
242 BIO_printf(bio_err, " -out arg output file - "
244 BIO_printf(bio_err, " -noout do not print the "
246 BIO_printf(bio_err, " -text print the ec "
247 "parameters in text form\n");
248 BIO_printf(bio_err, " -check validate the ec "
250 BIO_printf(bio_err, " -C print a 'C' "
251 "function creating the parameters\n");
252 BIO_printf(bio_err, " -name arg use the "
253 "ec parameters with 'short name' name\n");
254 BIO_printf(bio_err, " -list_curves prints a list of "
255 "all currently available curve 'short names'\n");
256 BIO_printf(bio_err, " -conv_form arg specifies the "
257 "point conversion form \n");
258 BIO_printf(bio_err, " possible values:"
260 BIO_printf(bio_err, " "
261 " uncompressed (default)\n");
262 BIO_printf(bio_err, " "
264 BIO_printf(bio_err, " -param_enc arg specifies the way"
265 " the ec parameters are encoded\n");
266 BIO_printf(bio_err, " in the asn1 der "
268 BIO_printf(bio_err, " possible values:"
269 " named_curve (default)\n");
270 BIO_printf(bio_err, " "
272 BIO_printf(bio_err, " -no_seed if 'explicit'"
273 " parameters are chosen do not" " use the seed\n");
274 BIO_printf(bio_err, " -genkey generate ec" " key\n");
275 BIO_printf(bio_err, " -rand file files to use for"
276 " random number input\n");
277 BIO_printf(bio_err, " -engine e use engine e, "
278 "possibly a hardware device\n");
282 ERR_load_crypto_strings();
284 in = BIO_new(BIO_s_file());
285 out = BIO_new(BIO_s_file());
286 if ((in == NULL) || (out == NULL)) {
287 ERR_print_errors(bio_err);
292 BIO_set_fp(in, stdin, BIO_NOCLOSE);
294 if (BIO_read_filename(in, infile) <= 0) {
299 if (outfile == NULL) {
300 BIO_set_fp(out, stdout, BIO_NOCLOSE);
301 # ifdef OPENSSL_SYS_VMS
303 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
304 out = BIO_push(tmpbio, out);
308 if (BIO_write_filename(out, outfile) <= 0) {
314 # ifndef OPENSSL_NO_ENGINE
315 setup_engine(bio_err, engine, 0);
319 EC_builtin_curve *curves = NULL;
323 crv_len = EC_get_builtin_curves(NULL, 0);
325 curves = OPENSSL_malloc((int)(sizeof(EC_builtin_curve) * crv_len));
330 if (!EC_get_builtin_curves(curves, crv_len)) {
331 OPENSSL_free(curves);
335 for (n = 0; n < crv_len; n++) {
338 comment = curves[n].comment;
339 sname = OBJ_nid2sn(curves[n].nid);
341 comment = "CURVE DESCRIPTION NOT AVAILABLE";
345 BIO_printf(out, " %-10s: ", sname);
346 BIO_printf(out, "%s\n", comment);
349 OPENSSL_free(curves);
354 if (curve_name != NULL) {
358 * workaround for the SECG curve names secp192r1 and secp256r1 (which
359 * are the same as the curves prime192v1 and prime256v1 defined in
362 if (!strcmp(curve_name, "secp192r1")) {
363 BIO_printf(bio_err, "using curve name prime192v1 "
364 "instead of secp192r1\n");
365 nid = NID_X9_62_prime192v1;
366 } else if (!strcmp(curve_name, "secp256r1")) {
367 BIO_printf(bio_err, "using curve name prime256v1 "
368 "instead of secp256r1\n");
369 nid = NID_X9_62_prime256v1;
371 nid = OBJ_sn2nid(curve_name);
374 nid = EC_curve_nist2nid(curve_name);
377 BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
381 group = EC_GROUP_new_by_curve_name(nid);
383 BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
386 EC_GROUP_set_asn1_flag(group, asn1_flag);
387 EC_GROUP_set_point_conversion_form(group, form);
388 } else if (informat == FORMAT_ASN1) {
389 group = d2i_ECPKParameters_bio(in, NULL);
390 } else if (informat == FORMAT_PEM) {
391 group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
393 BIO_printf(bio_err, "bad input format specified\n");
398 BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
399 ERR_print_errors(bio_err);
404 EC_GROUP_set_point_conversion_form(group, form);
407 EC_GROUP_set_asn1_flag(group, asn1_flag);
410 EC_GROUP_set_seed(group, NULL, 0);
414 if (!ECPKParameters_print(out, group, 0))
419 BIO_printf(bio_err, "checking elliptic curve parameters: ");
420 if (!EC_GROUP_check(group, NULL)) {
421 BIO_printf(bio_err, "failed\n");
422 ERR_print_errors(bio_err);
425 BIO_printf(bio_err, "ok\n");
430 size_t buf_len = 0, tmp_len = 0;
431 const EC_POINT *point;
432 int is_prime, len = 0;
433 const EC_METHOD *meth = EC_GROUP_method_of(group);
435 if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
436 (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
437 (ec_order = BN_new()) == NULL ||
438 (ec_cofactor = BN_new()) == NULL) {
439 perror("OPENSSL_malloc");
443 is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
446 if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, ec_b, NULL))
453 if ((point = EC_GROUP_get0_generator(group)) == NULL)
455 if (!EC_POINT_point2bn(group, point,
456 EC_GROUP_get_point_conversion_form(group),
459 if (!EC_GROUP_get_order(group, ec_order, NULL))
461 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
464 if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
467 len = BN_num_bits(ec_order);
469 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
471 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
473 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
475 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
477 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
479 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
482 buffer = (unsigned char *)OPENSSL_malloc(buf_len);
484 if (buffer == NULL) {
485 perror("OPENSSL_malloc");
489 ecparam_print_var(out, ec_p, "ec_p", len, buffer);
490 ecparam_print_var(out, ec_a, "ec_a", len, buffer);
491 ecparam_print_var(out, ec_b, "ec_b", len, buffer);
492 ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
493 ecparam_print_var(out, ec_order, "ec_order", len, buffer);
494 ecparam_print_var(out, ec_cofactor, "ec_cofactor", len, buffer);
496 BIO_printf(out, "\n\n");
498 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
499 BIO_printf(out, "\tint ok=0;\n");
500 BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
501 BIO_printf(out, "\tEC_POINT *point = NULL;\n");
502 BIO_printf(out, "\tBIGNUM *tmp_1 = NULL, *tmp_2 = NULL, "
503 "*tmp_3 = NULL;\n\n");
504 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
505 "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
506 "goto err;\n", len, len);
507 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
508 "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
509 "goto err;\n", len, len);
510 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
511 "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
512 "goto err;\n", len, len);
514 BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
515 "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
516 "\n\t\tgoto err;\n\n");
521 BIO_printf(out, "\t/* build generator */\n");
522 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
523 "sizeof(ec_gen_%d), tmp_1)) == NULL)"
524 "\n\t\tgoto err;\n", len, len);
525 BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
527 BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
528 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
529 "sizeof(ec_order_%d), tmp_2)) == NULL)"
530 "\n\t\tgoto err;\n", len, len);
531 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
532 "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
533 "\n\t\tgoto err;\n", len, len);
534 BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
535 " tmp_2, tmp_3))\n\t\tgoto err;\n");
536 BIO_printf(out, "\n\tok=1;\n");
537 BIO_printf(out, "err:\n");
538 BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
539 BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
540 BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
541 BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
542 BIO_printf(out, "\tif (!ok)\n");
543 BIO_printf(out, "\t\t{\n");
544 BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
545 BIO_printf(out, "\t\tgroup = NULL;\n");
546 BIO_printf(out, "\t\t}\n");
547 BIO_printf(out, "\treturn(group);\n\t}\n");
551 if (outformat == FORMAT_ASN1)
552 i = i2d_ECPKParameters_bio(out, group);
553 else if (outformat == FORMAT_PEM)
554 i = PEM_write_bio_ECPKParameters(out, group);
556 BIO_printf(bio_err, "bad output format specified for"
561 BIO_printf(bio_err, "unable to write elliptic "
562 "curve parameters\n");
563 ERR_print_errors(bio_err);
569 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
571 BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
572 app_RAND_load_files(inrand));
576 EC_KEY *eckey = EC_KEY_new();
583 if (EC_KEY_set_group(eckey, group) == 0)
586 if (!EC_KEY_generate_key(eckey)) {
590 if (outformat == FORMAT_ASN1)
591 i = i2d_ECPrivateKey_bio(out, eckey);
592 else if (outformat == FORMAT_PEM)
593 i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
594 NULL, 0, NULL, NULL);
596 BIO_printf(bio_err, "bad output format specified "
605 app_RAND_write_file(NULL, bio_err);
620 BN_free(ec_cofactor);
622 OPENSSL_free(buffer);
628 EC_GROUP_free(group);
633 static int ecparam_print_var(BIO *out, BIGNUM *in, const char *var,
634 int len, unsigned char *buffer)
636 BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
638 BIO_printf(out, "\n\t0x00");
642 l = BN_bn2bin(in, buffer);
643 for (i = 0; i < l - 1; i++) {
645 BIO_printf(out, "\n\t");
646 BIO_printf(out, "0x%02X,", buffer[i]);
649 BIO_printf(out, "\n\t");
650 BIO_printf(out, "0x%02X", buffer[i]);
652 BIO_printf(out, "\n\t};\n\n");
655 #else /* !OPENSSL_NO_EC */
658 static void *dummy = &dummy;