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
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)
104 * -param_enc arg - specifies the way the ec parameters are encoded
105 * in the asn1 der encoding
106 * possible values: named_curve (default)
108 * -no_seed - if 'explicit' parameters are chosen 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
115 static int ecparam_print_var(BIO *,BIGNUM *,const char *,int,unsigned char *);
117 int MAIN(int, char **);
119 int MAIN(int argc, char **argv)
121 EC_GROUP *group = NULL;
122 point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
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;
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;
141 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
142 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
144 if (!load_config(bio_err, NULL))
148 outformat=FORMAT_PEM;
155 if (strcmp(*argv,"-inform") == 0)
157 if (--argc < 1) goto bad;
158 informat=str2fmt(*(++argv));
160 else if (strcmp(*argv,"-outform") == 0)
162 if (--argc < 1) goto bad;
163 outformat=str2fmt(*(++argv));
165 else if (strcmp(*argv,"-in") == 0)
167 if (--argc < 1) goto bad;
170 else if (strcmp(*argv,"-out") == 0)
172 if (--argc < 1) goto bad;
175 else if (strcmp(*argv,"-text") == 0)
177 else if (strcmp(*argv,"-C") == 0)
179 else if (strcmp(*argv,"-check") == 0)
181 else if (strcmp (*argv, "-name") == 0)
185 curve_name = *(++argv);
187 else if (strcmp(*argv, "-list_curves") == 0)
189 else if (strcmp(*argv, "-conv_form") == 0)
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;
204 else if (strcmp(*argv, "-param_enc") == 0)
210 if (strcmp(*argv, "named_curve") == 0)
211 asn1_flag = OPENSSL_EC_NAMED_CURVE;
212 else if (strcmp(*argv, "explicit") == 0)
217 else if (strcmp(*argv, "-no_seed") == 0)
219 else if (strcmp(*argv, "-noout") == 0)
221 else if (strcmp(*argv,"-genkey") == 0)
226 else if (strcmp(*argv, "-rand") == 0)
228 if (--argc < 1) goto bad;
232 else if(strcmp(*argv, "-engine") == 0)
234 if (--argc < 1) goto bad;
239 BIO_printf(bio_err,"unknown option %s\n",*argv);
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 - "
256 BIO_printf(bio_err, " -in arg input file - "
258 BIO_printf(bio_err, " -out arg output file - "
260 BIO_printf(bio_err, " -noout do not print the "
262 BIO_printf(bio_err, " -text print the ec "
263 "parameters in text form\n");
264 BIO_printf(bio_err, " -check validate the ec "
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:"
276 BIO_printf(bio_err, " "
277 " uncompressed (default)\n");
278 BIO_printf(bio_err, " "
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 "
284 BIO_printf(bio_err, " possible values:"
285 " named_curve (default)\n");
286 BIO_printf(bio_err, " "
288 BIO_printf(bio_err, " -no_seed if 'explicit'"
289 " parameters are chosen do not"
291 BIO_printf(bio_err, " -genkey generate ec"
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");
300 ERR_load_crypto_strings();
302 in=BIO_new(BIO_s_file());
303 out=BIO_new(BIO_s_file());
304 if ((in == NULL) || (out == NULL))
306 ERR_print_errors(bio_err);
311 BIO_set_fp(in,stdin,BIO_NOCLOSE);
314 if (BIO_read_filename(in,infile) <= 0)
322 BIO_set_fp(out,stdout,BIO_NOCLOSE);
323 #ifdef OPENSSL_SYS_VMS
325 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
326 out = BIO_push(tmpbio, out);
332 if (BIO_write_filename(out,outfile) <= 0)
339 #ifndef OPENSSL_NO_ENGINE
340 setup_engine(bio_err, engine, 0);
345 EC_builtin_curve *curves = NULL;
349 crv_len = EC_get_builtin_curves(NULL, 0);
351 curves = OPENSSL_malloc((int)(sizeof(EC_builtin_curve) * crv_len));
356 if (!EC_get_builtin_curves(curves, crv_len))
358 OPENSSL_free(curves);
363 for (n = 0; n < crv_len; n++)
367 comment = curves[n].comment;
368 sname = OBJ_nid2sn(curves[n].nid);
370 comment = "CURVE DESCRIPTION NOT AVAILABLE";
374 BIO_printf(out, " %-10s: ", sname);
375 BIO_printf(out, "%s\n", comment);
378 OPENSSL_free(curves);
383 if (curve_name != NULL)
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)
391 if (!strcmp(curve_name, "secp192r1"))
393 BIO_printf(bio_err, "using curve name prime192v1 "
394 "instead of secp192r1\n");
395 nid = NID_X9_62_prime192v1;
397 else if (!strcmp(curve_name, "secp256r1"))
399 BIO_printf(bio_err, "using curve name prime256v1 "
400 "instead of secp256r1\n");
401 nid = NID_X9_62_prime256v1;
404 nid = OBJ_sn2nid(curve_name);
408 BIO_printf(bio_err, "unknown curve name (%s)\n",
413 group = EC_GROUP_new_by_curve_name(nid);
416 BIO_printf(bio_err, "unable to create curve (%s)\n",
420 EC_GROUP_set_asn1_flag(group, asn1_flag);
421 EC_GROUP_set_point_conversion_form(group, form);
423 else if (informat == FORMAT_ASN1)
425 group = d2i_ECPKParameters_bio(in, NULL);
427 else if (informat == FORMAT_PEM)
429 group = PEM_read_bio_ECPKParameters(in,NULL,NULL,NULL);
433 BIO_printf(bio_err, "bad input format specified\n");
440 "unable to load elliptic curve parameters\n");
441 ERR_print_errors(bio_err);
446 EC_GROUP_set_point_conversion_form(group, form);
449 EC_GROUP_set_asn1_flag(group, asn1_flag);
453 EC_GROUP_set_seed(group, NULL, 0);
458 if (!ECPKParameters_print(out, group, 0))
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))
469 BIO_printf(bio_err, "failed\n");
470 ERR_print_errors(bio_err);
473 BIO_printf(bio_err, "ok\n");
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);
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 )
489 perror("OPENSSL_malloc");
493 is_prime = (EC_METHOD_get_field_type(meth) ==
494 NID_X9_62_prime_field);
498 if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a,
508 if ((point = EC_GROUP_get0_generator(group)) == NULL)
510 if (!EC_POINT_point2bn(group, point,
511 EC_GROUP_get_point_conversion_form(group), ec_gen,
514 if (!EC_GROUP_get_order(group, ec_order, NULL))
516 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
519 if (!ec_p || !ec_a || !ec_b || !ec_gen ||
520 !ec_order || !ec_cofactor)
523 len = BN_num_bits(ec_order);
525 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
527 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
529 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
531 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
533 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
535 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
538 buffer = (unsigned char *)OPENSSL_malloc(buf_len);
542 perror("OPENSSL_malloc");
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,
554 BIO_printf(out, "\n\n");
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);
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");
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, "
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");
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);
619 BIO_printf(bio_err,"bad output format specified for"
625 BIO_printf(bio_err, "unable to write elliptic "
626 "curve parameters\n");
627 ERR_print_errors(bio_err);
634 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
636 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
637 app_RAND_load_files(inrand));
642 EC_KEY *eckey = EC_KEY_new();
649 if (EC_KEY_set_group(eckey, group) == 0)
652 if (!EC_KEY_generate_key(eckey))
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);
664 BIO_printf(bio_err, "bad output format specified "
673 app_RAND_write_file(NULL, bio_err);
688 BN_free(ec_cofactor);
690 OPENSSL_free(buffer);
696 EC_GROUP_free(group);
701 static int ecparam_print_var(BIO *out, BIGNUM *in, const char *var,
702 int len, unsigned char *buffer)
704 BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
706 BIO_printf(out, "\n\t0x00");
711 l = BN_bn2bin(in, buffer);
712 for (i=0; i<l-1; i++)
715 BIO_printf(out, "\n\t");
716 BIO_printf(out, "0x%02X,", buffer[i]);
719 BIO_printf(out, "\n\t");
720 BIO_printf(out, "0x%02X", buffer[i]);
722 BIO_printf(out, "\n\t};\n\n");
725 #else /* !OPENSSL_NO_EC */
728 static void *dummy=&dummy;