2 * Copyright 2002-2017 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
5 * Licensed under the OpenSSL license (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
11 #include <openssl/opensslconf.h>
13 NON_EMPTY_TRANSLATION_UNIT
21 # include <openssl/bio.h>
22 # include <openssl/err.h>
23 # include <openssl/bn.h>
24 # include <openssl/ec.h>
25 # include <openssl/x509.h>
26 # include <openssl/pem.h>
28 typedef enum OPTION_choice {
29 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
30 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
31 OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME,
32 OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_RAND, OPT_ENGINE
35 const OPTIONS ecparam_options[] = {
36 {"help", OPT_HELP, '-', "Display this summary"},
37 {"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
38 {"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
39 {"in", OPT_IN, '<', "Input file - default stdin"},
40 {"out", OPT_OUT, '>', "Output file - default stdout"},
41 {"text", OPT_TEXT, '-', "Print the ec parameters in text form"},
42 {"C", OPT_C, '-', "Print a 'C' function creating the parameters"},
43 {"check", OPT_CHECK, '-', "Validate the ec parameters"},
44 {"list_curves", OPT_LIST_CURVES, '-',
45 "Prints a list of all curve 'short names'"},
46 {"no_seed", OPT_NO_SEED, '-',
47 "If 'explicit' parameters are chosen do not use the seed"},
48 {"noout", OPT_NOOUT, '-', "Do not print the ec parameter"},
49 {"name", OPT_NAME, 's',
50 "Use the ec parameters with specified 'short name'"},
51 {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
52 {"param_enc", OPT_PARAM_ENC, 's',
53 "Specifies the way the ec parameters are encoded"},
54 {"genkey", OPT_GENKEY, '-', "Generate ec key"},
55 {"rand", OPT_RAND, 's', "Files to use for random number input"},
56 # ifndef OPENSSL_NO_ENGINE
57 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
62 static OPT_PAIR forms[] = {
63 {"compressed", POINT_CONVERSION_COMPRESSED},
64 {"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
65 {"hybrid", POINT_CONVERSION_HYBRID},
69 static OPT_PAIR encodings[] = {
70 {"named_curve", OPENSSL_EC_NAMED_CURVE},
75 int ecparam_main(int argc, char **argv)
78 BIGNUM *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
79 BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL;
80 BIO *in = NULL, *out = NULL;
81 EC_GROUP *group = NULL;
82 point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
83 char *curve_name = NULL, *inrand = NULL;
84 char *infile = NULL, *outfile = NULL, *prog;
85 unsigned char *buffer = NULL;
87 int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_asn1_flag = 0;
88 int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
89 int ret = 1, private = 0;
90 int list_curves = 0, no_seed = 0, check = 0, new_form = 0;
91 int text = 0, i, need_rand = 0, genkey = 0;
93 prog = opt_init(argc, argv, ecparam_options);
94 while ((o = opt_next()) != OPT_EOF) {
99 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
102 opt_help(ecparam_options);
106 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
113 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
128 case OPT_LIST_CURVES:
138 curve_name = opt_arg();
141 if (!opt_pair(opt_arg(), forms, &new_form))
147 if (!opt_pair(opt_arg(), encodings, &asn1_flag))
152 genkey = need_rand = 1;
159 e = setup_engine(opt_arg(), 0);
163 argc = opt_num_rest();
167 private = genkey ? 1 : 0;
169 in = bio_open_default(infile, 'r', informat);
172 out = bio_open_owner(outfile, outformat, private);
177 EC_builtin_curve *curves = NULL;
178 size_t crv_len = EC_get_builtin_curves(NULL, 0);
181 curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves");
182 if (!EC_get_builtin_curves(curves, crv_len)) {
183 OPENSSL_free(curves);
187 for (n = 0; n < crv_len; n++) {
190 comment = curves[n].comment;
191 sname = OBJ_nid2sn(curves[n].nid);
193 comment = "CURVE DESCRIPTION NOT AVAILABLE";
197 BIO_printf(out, " %-10s: ", sname);
198 BIO_printf(out, "%s\n", comment);
201 OPENSSL_free(curves);
206 if (curve_name != NULL) {
210 * workaround for the SECG curve names secp192r1 and secp256r1 (which
211 * are the same as the curves prime192v1 and prime256v1 defined in
214 if (strcmp(curve_name, "secp192r1") == 0) {
215 BIO_printf(bio_err, "using curve name prime192v1 "
216 "instead of secp192r1\n");
217 nid = NID_X9_62_prime192v1;
218 } else if (strcmp(curve_name, "secp256r1") == 0) {
219 BIO_printf(bio_err, "using curve name prime256v1 "
220 "instead of secp256r1\n");
221 nid = NID_X9_62_prime256v1;
223 nid = OBJ_sn2nid(curve_name);
227 nid = EC_curve_nist2nid(curve_name);
230 BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
234 group = EC_GROUP_new_by_curve_name(nid);
236 BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
239 EC_GROUP_set_asn1_flag(group, asn1_flag);
240 EC_GROUP_set_point_conversion_form(group, form);
241 } else if (informat == FORMAT_ASN1) {
242 group = d2i_ECPKParameters_bio(in, NULL);
244 group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
247 BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
248 ERR_print_errors(bio_err);
253 EC_GROUP_set_point_conversion_form(group, form);
256 EC_GROUP_set_asn1_flag(group, asn1_flag);
259 EC_GROUP_set_seed(group, NULL, 0);
263 if (!ECPKParameters_print(out, group, 0))
268 BIO_printf(bio_err, "checking elliptic curve parameters: ");
269 if (!EC_GROUP_check(group, NULL)) {
270 BIO_printf(bio_err, "failed\n");
271 ERR_print_errors(bio_err);
274 BIO_printf(bio_err, "ok\n");
279 size_t buf_len = 0, tmp_len = 0;
280 const EC_POINT *point;
281 int is_prime, len = 0;
282 const EC_METHOD *meth = EC_GROUP_method_of(group);
284 if ((ec_p = BN_new()) == NULL
285 || (ec_a = BN_new()) == NULL
286 || (ec_b = BN_new()) == NULL
287 || (ec_gen = BN_new()) == NULL
288 || (ec_order = BN_new()) == NULL
289 || (ec_cofactor = BN_new()) == NULL) {
290 perror("Can't allocate BN");
294 is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
296 BIO_printf(bio_err, "Can only handle X9.62 prime fields\n");
300 if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, ec_b, NULL))
303 if ((point = EC_GROUP_get0_generator(group)) == NULL)
305 if (!EC_POINT_point2bn(group, point,
306 EC_GROUP_get_point_conversion_form(group),
309 if (!EC_GROUP_get_order(group, ec_order, NULL))
311 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
314 if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
317 len = BN_num_bits(ec_order);
319 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
321 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
323 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
325 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
327 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
329 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
332 buffer = app_malloc(buf_len, "BN buffer");
334 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n{\n", len);
335 print_bignum_var(out, ec_p, "ec_p", len, buffer);
336 print_bignum_var(out, ec_a, "ec_a", len, buffer);
337 print_bignum_var(out, ec_b, "ec_b", len, buffer);
338 print_bignum_var(out, ec_gen, "ec_gen", len, buffer);
339 print_bignum_var(out, ec_order, "ec_order", len, buffer);
340 print_bignum_var(out, ec_cofactor, "ec_cofactor", len, buffer);
341 BIO_printf(out, " int ok = 0;\n"
342 " EC_GROUP *group = NULL;\n"
343 " EC_POINT *point = NULL;\n"
344 " BIGNUM *tmp_1 = NULL;\n"
345 " BIGNUM *tmp_2 = NULL;\n"
346 " BIGNUM *tmp_3 = NULL;\n"
349 BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof (ec_p_%d), NULL)) == NULL)\n"
350 " goto err;\n", len, len);
351 BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof (ec_a_%d), NULL)) == NULL)\n"
352 " goto err;\n", len, len);
353 BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof (ec_b_%d), NULL)) == NULL)\n"
354 " goto err;\n", len, len);
355 BIO_printf(out, " if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n"
358 BIO_printf(out, " /* build generator */\n");
359 BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof (ec_gen_%d), tmp_1)) == NULL)\n"
360 " goto err;\n", len, len);
361 BIO_printf(out, " point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n");
362 BIO_printf(out, " if (point == NULL)\n"
364 BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof (ec_order_%d), tmp_2)) == NULL)\n"
365 " goto err;\n", len, len);
366 BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof (ec_cofactor_%d), tmp_3)) == NULL)\n"
367 " goto err;\n", len, len);
368 BIO_printf(out, " if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n"
372 BIO_printf(out, "err:\n"
376 " EC_POINT_free(point);\n"
378 " EC_GROUP_free(group);\n"
386 if (outformat == FORMAT_ASN1)
387 i = i2d_ECPKParameters_bio(out, group);
389 i = PEM_write_bio_ECPKParameters(out, group);
391 BIO_printf(bio_err, "unable to write elliptic "
392 "curve parameters\n");
393 ERR_print_errors(bio_err);
399 app_RAND_load_file(NULL, (inrand != NULL));
401 BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
402 app_RAND_load_files(inrand));
406 EC_KEY *eckey = EC_KEY_new();
413 if (EC_KEY_set_group(eckey, group) == 0) {
414 BIO_printf(bio_err, "unable to set group when generating key\n");
416 ERR_print_errors(bio_err);
420 if (!EC_KEY_generate_key(eckey)) {
421 BIO_printf(bio_err, "unable to generate key\n");
423 ERR_print_errors(bio_err);
427 if (outformat == FORMAT_ASN1)
428 i = i2d_ECPrivateKey_bio(out, eckey);
430 i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
431 NULL, 0, NULL, NULL);
436 app_RAND_write_file(NULL);
445 BN_free(ec_cofactor);
446 OPENSSL_free(buffer);
447 EC_GROUP_free(group);