3 * Written by Nils Larsch for the OpenSSL project.
5 /* ====================================================================
6 * Copyright (c) 1998-2002 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.
78 #include <openssl/bio.h>
79 #include <openssl/err.h>
80 #include <openssl/bn.h>
81 #include <openssl/ec.h>
82 #include <openssl/x509.h>
83 #include <openssl/pem.h>
86 #define PROG ecparam_main
88 /* -inform arg - input format - default PEM (DER or PEM)
89 * -outform arg - output format - default PEM
90 * -in arg - input file - default stdin
91 * -out arg - output file - default stdout
92 * -noout - do not print the ec parameter
93 * -text - print the ec parameters in text form
94 * -check - validate the ec parameters
95 * -C - print a 'C' function creating the parameters
96 * -name arg - use the ec parameters with 'short name' name
97 * -list_curves - prints a list of all currently available curve 'short names'
98 * -conv_form arg - specifies the point conversion form
99 * - possible values: compressed
100 * uncompressed (default)
102 * -param_enc arg - specifies the way the ec parameters are encoded
103 * in the asn1 der encoding
104 * possible values: named_curve (default)
106 * -no_seed - if 'explicit' parameters are choosen do not use the seed
107 * -genkey - generate ec key
108 * -rand file - files to use for random number input
109 * -engine e - use engine e, possibly a hardware device
113 static int ecparam_print_var(BIO *,BIGNUM *,const char *,int,unsigned char *);
115 int MAIN(int, char **);
117 int MAIN(int argc, char **argv)
119 EC_GROUP *group = NULL;
120 point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
122 int asn1_flag = OPENSSL_EC_NAMED_CURVE;
123 int new_asn1_flag = 0;
124 char *curve_name = NULL, *inrand = NULL;
125 int list_curves = 0, no_seed = 0, check = 0,
126 badops = 0, text = 0, i, need_rand = 0, genkey = 0;
127 char *infile = NULL, *outfile = NULL, *prog;
128 BIO *in = NULL, *out = NULL;
129 int informat, outformat, noout = 0, C = 0, ret = 1;
133 BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL,
134 *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
135 unsigned char *buffer = NULL;
140 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
141 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
143 if (!load_config(bio_err, NULL))
147 outformat=FORMAT_PEM;
154 if (strcmp(*argv,"-inform") == 0)
156 if (--argc < 1) goto bad;
157 informat=str2fmt(*(++argv));
159 else if (strcmp(*argv,"-outform") == 0)
161 if (--argc < 1) goto bad;
162 outformat=str2fmt(*(++argv));
164 else if (strcmp(*argv,"-in") == 0)
166 if (--argc < 1) goto bad;
169 else if (strcmp(*argv,"-out") == 0)
171 if (--argc < 1) goto bad;
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)
184 curve_name = *(++argv);
186 else if (strcmp(*argv, "-list_curves") == 0)
188 else if (strcmp(*argv, "-conv_form") == 0)
194 if (strcmp(*argv, "compressed") == 0)
195 form = POINT_CONVERSION_COMPRESSED;
196 else if (strcmp(*argv, "uncompressed") == 0)
197 form = POINT_CONVERSION_UNCOMPRESSED;
198 else if (strcmp(*argv, "hybrid") == 0)
199 form = POINT_CONVERSION_HYBRID;
203 else if (strcmp(*argv, "-param_enc") == 0)
209 if (strcmp(*argv, "named_curve") == 0)
210 asn1_flag = OPENSSL_EC_NAMED_CURVE;
211 else if (strcmp(*argv, "explicit") == 0)
216 else if (strcmp(*argv, "-no_seed") == 0)
218 else if (strcmp(*argv, "-noout") == 0)
220 else if (strcmp(*argv,"-genkey") == 0)
225 else if (strcmp(*argv, "-rand") == 0)
227 if (--argc < 1) goto bad;
231 else if(strcmp(*argv, "-engine") == 0)
233 if (--argc < 1) goto bad;
238 BIO_printf(bio_err,"unknown option %s\n",*argv);
249 BIO_printf(bio_err, "%s [options] <infile >outfile\n",prog);
250 BIO_printf(bio_err, "where options are\n");
251 BIO_printf(bio_err, " -inform arg input format - "
252 "default PEM (DER or PEM)\n");
253 BIO_printf(bio_err, " -outform arg output format - "
255 BIO_printf(bio_err, " -in arg input file - "
257 BIO_printf(bio_err, " -out arg output file - "
259 BIO_printf(bio_err, " -noout do not print the "
261 BIO_printf(bio_err, " -text print the ec "
262 "parameters in text form\n");
263 BIO_printf(bio_err, " -check validate the ec "
265 BIO_printf(bio_err, " -C print a 'C' "
266 "function creating the parameters\n");
267 BIO_printf(bio_err, " -name arg use the "
268 "ec parameters with 'short name' name\n");
269 BIO_printf(bio_err, " -list_curves prints a list of "
270 "all currently available curve 'short names'\n");
271 BIO_printf(bio_err, " -conv_form arg specifies the "
272 "point conversion form \n");
273 BIO_printf(bio_err, " possible values:"
275 BIO_printf(bio_err, " "
276 " uncompressed (default)\n");
277 BIO_printf(bio_err, " "
279 BIO_printf(bio_err, " -param_enc arg specifies the way"
280 " the ec parameters are encoded\n");
281 BIO_printf(bio_err, " in the asn1 der "
283 BIO_printf(bio_err, " possible values:"
284 " named_curve (default)\n");
285 BIO_printf(bio_err, " "
287 BIO_printf(bio_err, " -no_seed if 'explicit'"
288 " parameters are choosen do not"
290 BIO_printf(bio_err, " -genkey generate ec"
292 BIO_printf(bio_err, " -rand file files to use for"
293 " random number input\n");
294 BIO_printf(bio_err, " -engine e use engine e, "
295 "possibly a hardware device\n");
299 ERR_load_crypto_strings();
301 in=BIO_new(BIO_s_file());
302 out=BIO_new(BIO_s_file());
303 if ((in == NULL) || (out == NULL))
305 ERR_print_errors(bio_err);
310 BIO_set_fp(in,stdin,BIO_NOCLOSE);
313 if (BIO_read_filename(in,infile) <= 0)
321 BIO_set_fp(out,stdout,BIO_NOCLOSE);
322 #ifdef OPENSSL_SYS_VMS
324 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
325 out = BIO_push(tmpbio, out);
331 if (BIO_write_filename(out,outfile) <= 0)
338 e = setup_engine(bio_err, engine, 0);
342 EC_builtin_curve *curves = NULL;
347 crv_len = EC_get_builtin_curves(NULL, 0);
349 curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
354 if (!EC_get_builtin_curves(curves, crv_len))
356 OPENSSL_free(curves);
361 for (n = 0; n < crv_len; n++)
365 comment = curves[n].comment;
366 sname = OBJ_nid2sn(curves[n].nid);
368 comment = "CURVE DESCRIPTION NOT AVAILABLE";
372 len = BIO_printf(out, " %-10s: ", sname);
373 if (len + strlen(comment) > 80)
374 BIO_printf(out, "\n%80s\n", comment);
376 BIO_printf(out, "%s\n", comment);
379 OPENSSL_free(curves);
384 if (curve_name != NULL)
388 /* workaround for the SECG curve names secp192r1
389 * and secp256r1 (which are the same as the curves
390 * prime192v1 and prime256v1 defined in X9.62)
392 if (!strcmp(curve_name, "secp192r1"))
394 BIO_printf(bio_err, "using curve name prime192v1 "
395 "instead of secp192r1\n");
396 nid = NID_X9_62_prime192v1;
398 else if (!strcmp(curve_name, "secp256r1"))
400 BIO_printf(bio_err, "using curve name prime256v1 "
401 "instead of secp256r1\n");
402 nid = NID_X9_62_prime256v1;
405 nid = OBJ_sn2nid(curve_name);
409 BIO_printf(bio_err, "unknown curve name (%s)\n",
414 group = EC_GROUP_new_by_nid(nid);
417 BIO_printf(bio_err, "unable to create curve (%s)\n",
421 EC_GROUP_set_asn1_flag(group, asn1_flag);
422 EC_GROUP_set_point_conversion_form(group, form);
424 else if (informat == FORMAT_ASN1)
426 group = d2i_ECPKParameters_bio(in, NULL);
428 else if (informat == FORMAT_PEM)
430 group = PEM_read_bio_ECPKParameters(in,NULL,NULL,NULL);
434 BIO_printf(bio_err, "bad input format specified\n");
441 "unable to load elliptic curve parameters\n");
442 ERR_print_errors(bio_err);
447 EC_GROUP_set_point_conversion_form(group, form);
450 EC_GROUP_set_asn1_flag(group, asn1_flag);
454 EC_GROUP_set_seed(group, NULL, 0);
459 if (!ECPKParameters_print(out, group, 0))
466 BIO_printf(bio_err, "no elliptic curve parameters\n");
467 BIO_printf(bio_err, "checking elliptic curve parameters: ");
468 if (!EC_GROUP_check(group, NULL))
470 BIO_printf(bio_err, "failed\n");
471 ERR_print_errors(bio_err);
474 BIO_printf(bio_err, "ok\n");
480 size_t buf_len = 0, tmp_len = 0;
481 const EC_POINT *point;
482 int is_prime, len = 0;
483 const EC_METHOD *meth = EC_GROUP_method_of(group);
485 if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
486 (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
487 (ec_order = BN_new()) == NULL ||
488 (ec_cofactor = BN_new()) == NULL )
490 perror("OPENSSL_malloc");
494 is_prime = (EC_METHOD_get_field_type(meth) ==
495 NID_X9_62_prime_field);
499 if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a,
509 if ((point = EC_GROUP_get0_generator(group)) == NULL)
511 if (!EC_POINT_point2bn(group, point,
512 EC_GROUP_get_point_conversion_form(group), ec_gen,
515 if (!EC_GROUP_get_order(group, ec_order, NULL))
517 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
520 if (!ec_p || !ec_a || !ec_b || !ec_gen ||
521 !ec_order || !ec_cofactor)
524 len = BN_num_bits(ec_order);
526 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
528 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
530 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
532 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
534 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
536 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
539 buffer = (unsigned char *)OPENSSL_malloc(buf_len);
543 perror("OPENSSL_malloc");
547 ecparam_print_var(out, ec_p, "ec_p", len, buffer);
548 ecparam_print_var(out, ec_a, "ec_a", len, buffer);
549 ecparam_print_var(out, ec_b, "ec_b", len, buffer);
550 ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
551 ecparam_print_var(out, ec_order, "ec_order", len, buffer);
552 ecparam_print_var(out, ec_cofactor, "ec_cofactor", len,
555 BIO_printf(out, "\n\n");
557 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
558 BIO_printf(out, "\tint ok=0;\n");
559 BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
560 BIO_printf(out, "\tEC_POINT *point = NULL;\n");
561 BIO_printf(out, "\tBIGNUM *tmp_1 = NULL, *tmp_2 = NULL, "
562 "*tmp_3 = NULL;\n\n");
563 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
564 "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
565 "goto err;\n", len, len);
566 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
567 "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
568 "goto err;\n", len, len);
569 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
570 "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
571 "goto err;\n", len, len);
574 BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
575 "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
576 "\n\t\tgoto err;\n\n");
583 BIO_printf(out, "\t/* build generator */\n");
584 BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
585 "sizeof(ec_gen_%d), tmp_1)) == NULL)"
586 "\n\t\tgoto err;\n", len, len);
587 BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
589 BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
590 BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
591 "sizeof(ec_order_%d), tmp_2)) == NULL)"
592 "\n\t\tgoto err;\n", len, len);
593 BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
594 "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
595 "\n\t\tgoto err;\n", len, len);
596 BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
597 " tmp_2, tmp_3))\n\t\tgoto err;\n");
598 BIO_printf(out, "\n\tok=1;\n");
599 BIO_printf(out, "err:\n");
600 BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
601 BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
602 BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
603 BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
604 BIO_printf(out, "\tif (!ok)\n");
605 BIO_printf(out, "\t\t{\n");
606 BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
607 BIO_printf(out, "\t\tgroup = NULL;\n");
608 BIO_printf(out, "\t\t}\n");
609 BIO_printf(out, "\treturn(group);\n\t}\n");
614 if (outformat == FORMAT_ASN1)
615 i = i2d_ECPKParameters_bio(out, group);
616 else if (outformat == FORMAT_PEM)
617 i = PEM_write_bio_ECPKParameters(out, group);
620 BIO_printf(bio_err,"bad output format specified for"
626 BIO_printf(bio_err, "unable to write elliptic "
627 "curve parameters\n");
628 ERR_print_errors(bio_err);
635 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
637 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
638 app_RAND_load_files(inrand));
643 EC_KEY *eckey = EC_KEY_new();
650 eckey->group = group;
652 if (!EC_KEY_generate_key(eckey))
658 if (outformat == FORMAT_ASN1)
659 i = i2d_ECPrivateKey_bio(out, eckey);
660 else if (outformat == FORMAT_PEM)
661 i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
662 NULL, 0, NULL, NULL);
665 BIO_printf(bio_err, "bad output format specified "
676 app_RAND_write_file(NULL, bio_err);
691 BN_free(ec_cofactor);
693 OPENSSL_free(buffer);
699 EC_GROUP_free(group);
704 static int ecparam_print_var(BIO *out, BIGNUM *in, const char *var,
705 int len, unsigned char *buffer)
707 BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
709 BIO_printf(out, "\n\t0x00");
714 l = BN_bn2bin(in, buffer);
715 for (i=0; i<l-1; i++)
718 BIO_printf(out, "\n\t");
719 BIO_printf(out, "0x%02X,", buffer[i]);
722 BIO_printf(out, "\n\t");
723 BIO_printf(out, "0x%02X", buffer[i]);
725 BIO_printf(out, "\n\t};\n\n");