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source: vbox/trunk/src/libs/openssl-1.1.1f/apps/ecparam.c@ 83531

Last change on this file since 83531 was 83531, checked in by vboxsync, 5 years ago

setting svn:sync-process=export for openssl-1.1.1f, all files except tests
File size: 14.7 KB
Line 
1/*
2 * Copyright 2002-2018 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4 *
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
9 */
10
11#include <openssl/opensslconf.h>
12#ifdef OPENSSL_NO_EC
13NON_EMPTY_TRANSLATION_UNIT
14#else
15
16# include <stdio.h>
17# include <stdlib.h>
18# include <time.h>
19# include <string.h>
20# include "apps.h"
21# include "progs.h"
22# include <openssl/bio.h>
23# include <openssl/err.h>
24# include <openssl/bn.h>
25# include <openssl/ec.h>
26# include <openssl/x509.h>
27# include <openssl/pem.h>
28
29typedef enum OPTION_choice {
30 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
31 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
32 OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME,
33 OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_ENGINE,
34 OPT_R_ENUM
35} OPTION_CHOICE;
36
37const OPTIONS ecparam_options[] = {
38 {"help", OPT_HELP, '-', "Display this summary"},
39 {"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
40 {"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
41 {"in", OPT_IN, '<', "Input file - default stdin"},
42 {"out", OPT_OUT, '>', "Output file - default stdout"},
43 {"text", OPT_TEXT, '-', "Print the ec parameters in text form"},
44 {"C", OPT_C, '-', "Print a 'C' function creating the parameters"},
45 {"check", OPT_CHECK, '-', "Validate the ec parameters"},
46 {"list_curves", OPT_LIST_CURVES, '-',
47 "Prints a list of all curve 'short names'"},
48 {"no_seed", OPT_NO_SEED, '-',
49 "If 'explicit' parameters are chosen do not use the seed"},
50 {"noout", OPT_NOOUT, '-', "Do not print the ec parameter"},
51 {"name", OPT_NAME, 's',
52 "Use the ec parameters with specified 'short name'"},
53 {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
54 {"param_enc", OPT_PARAM_ENC, 's',
55 "Specifies the way the ec parameters are encoded"},
56 {"genkey", OPT_GENKEY, '-', "Generate ec key"},
57 OPT_R_OPTIONS,
58# ifndef OPENSSL_NO_ENGINE
59 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
60# endif
61 {NULL}
62};
63
64static OPT_PAIR forms[] = {
65 {"compressed", POINT_CONVERSION_COMPRESSED},
66 {"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
67 {"hybrid", POINT_CONVERSION_HYBRID},
68 {NULL}
69};
70
71static OPT_PAIR encodings[] = {
72 {"named_curve", OPENSSL_EC_NAMED_CURVE},
73 {"explicit", 0},
74 {NULL}
75};
76
77int ecparam_main(int argc, char **argv)
78{
79 ENGINE *e = NULL;
80 BIGNUM *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
81 BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL;
82 BIO *in = NULL, *out = NULL;
83 EC_GROUP *group = NULL;
84 point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
85 char *curve_name = NULL;
86 char *infile = NULL, *outfile = NULL, *prog;
87 unsigned char *buffer = NULL;
88 OPTION_CHOICE o;
89 int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_asn1_flag = 0;
90 int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
91 int ret = 1, private = 0;
92 int list_curves = 0, no_seed = 0, check = 0, new_form = 0;
93 int text = 0, i, genkey = 0;
94
95 prog = opt_init(argc, argv, ecparam_options);
96 while ((o = opt_next()) != OPT_EOF) {
97 switch (o) {
98 case OPT_EOF:
99 case OPT_ERR:
100 opthelp:
101 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
102 goto end;
103 case OPT_HELP:
104 opt_help(ecparam_options);
105 ret = 0;
106 goto end;
107 case OPT_INFORM:
108 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
109 goto opthelp;
110 break;
111 case OPT_IN:
112 infile = opt_arg();
113 break;
114 case OPT_OUTFORM:
115 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
116 goto opthelp;
117 break;
118 case OPT_OUT:
119 outfile = opt_arg();
120 break;
121 case OPT_TEXT:
122 text = 1;
123 break;
124 case OPT_C:
125 C = 1;
126 break;
127 case OPT_CHECK:
128 check = 1;
129 break;
130 case OPT_LIST_CURVES:
131 list_curves = 1;
132 break;
133 case OPT_NO_SEED:
134 no_seed = 1;
135 break;
136 case OPT_NOOUT:
137 noout = 1;
138 break;
139 case OPT_NAME:
140 curve_name = opt_arg();
141 break;
142 case OPT_CONV_FORM:
143 if (!opt_pair(opt_arg(), forms, &new_form))
144 goto opthelp;
145 form = new_form;
146 new_form = 1;
147 break;
148 case OPT_PARAM_ENC:
149 if (!opt_pair(opt_arg(), encodings, &asn1_flag))
150 goto opthelp;
151 new_asn1_flag = 1;
152 break;
153 case OPT_GENKEY:
154 genkey = 1;
155 break;
156 case OPT_R_CASES:
157 if (!opt_rand(o))
158 goto end;
159 break;
160 case OPT_ENGINE:
161 e = setup_engine(opt_arg(), 0);
162 break;
163 }
164 }
165 argc = opt_num_rest();
166 if (argc != 0)
167 goto opthelp;
168
169 private = genkey ? 1 : 0;
170
171 in = bio_open_default(infile, 'r', informat);
172 if (in == NULL)
173 goto end;
174 out = bio_open_owner(outfile, outformat, private);
175 if (out == NULL)
176 goto end;
177
178 if (list_curves) {
179 EC_builtin_curve *curves = NULL;
180 size_t crv_len = EC_get_builtin_curves(NULL, 0);
181 size_t n;
182
183 curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves");
184 if (!EC_get_builtin_curves(curves, crv_len)) {
185 OPENSSL_free(curves);
186 goto end;
187 }
188
189 for (n = 0; n < crv_len; n++) {
190 const char *comment;
191 const char *sname;
192 comment = curves[n].comment;
193 sname = OBJ_nid2sn(curves[n].nid);
194 if (comment == NULL)
195 comment = "CURVE DESCRIPTION NOT AVAILABLE";
196 if (sname == NULL)
197 sname = "";
198
199 BIO_printf(out, " %-10s: ", sname);
200 BIO_printf(out, "%s\n", comment);
201 }
202
203 OPENSSL_free(curves);
204 ret = 0;
205 goto end;
206 }
207
208 if (curve_name != NULL) {
209 int nid;
210
211 /*
212 * workaround for the SECG curve names secp192r1 and secp256r1 (which
213 * are the same as the curves prime192v1 and prime256v1 defined in
214 * X9.62)
215 */
216 if (strcmp(curve_name, "secp192r1") == 0) {
217 BIO_printf(bio_err, "using curve name prime192v1 "
218 "instead of secp192r1\n");
219 nid = NID_X9_62_prime192v1;
220 } else if (strcmp(curve_name, "secp256r1") == 0) {
221 BIO_printf(bio_err, "using curve name prime256v1 "
222 "instead of secp256r1\n");
223 nid = NID_X9_62_prime256v1;
224 } else {
225 nid = OBJ_sn2nid(curve_name);
226 }
227
228 if (nid == 0)
229 nid = EC_curve_nist2nid(curve_name);
230
231 if (nid == 0) {
232 BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
233 goto end;
234 }
235
236 group = EC_GROUP_new_by_curve_name(nid);
237 if (group == NULL) {
238 BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
239 goto end;
240 }
241 EC_GROUP_set_asn1_flag(group, asn1_flag);
242 EC_GROUP_set_point_conversion_form(group, form);
243 } else if (informat == FORMAT_ASN1) {
244 group = d2i_ECPKParameters_bio(in, NULL);
245 } else {
246 group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
247 }
248 if (group == NULL) {
249 BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
250 ERR_print_errors(bio_err);
251 goto end;
252 }
253
254 if (new_form)
255 EC_GROUP_set_point_conversion_form(group, form);
256
257 if (new_asn1_flag)
258 EC_GROUP_set_asn1_flag(group, asn1_flag);
259
260 if (no_seed) {
261 EC_GROUP_set_seed(group, NULL, 0);
262 }
263
264 if (text) {
265 if (!ECPKParameters_print(out, group, 0))
266 goto end;
267 }
268
269 if (check) {
270 BIO_printf(bio_err, "checking elliptic curve parameters: ");
271 if (!EC_GROUP_check(group, NULL)) {
272 BIO_printf(bio_err, "failed\n");
273 ERR_print_errors(bio_err);
274 goto end;
275 }
276 BIO_printf(bio_err, "ok\n");
277
278 }
279
280 if (C) {
281 size_t buf_len = 0, tmp_len = 0;
282 const EC_POINT *point;
283 int is_prime, len = 0;
284 const EC_METHOD *meth = EC_GROUP_method_of(group);
285
286 if ((ec_p = BN_new()) == NULL
287 || (ec_a = BN_new()) == NULL
288 || (ec_b = BN_new()) == NULL
289 || (ec_gen = BN_new()) == NULL
290 || (ec_order = BN_new()) == NULL
291 || (ec_cofactor = BN_new()) == NULL) {
292 perror("Can't allocate BN");
293 goto end;
294 }
295
296 is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
297 if (!is_prime) {
298 BIO_printf(bio_err, "Can only handle X9.62 prime fields\n");
299 goto end;
300 }
301
302 if (!EC_GROUP_get_curve(group, ec_p, ec_a, ec_b, NULL))
303 goto end;
304
305 if ((point = EC_GROUP_get0_generator(group)) == NULL)
306 goto end;
307 if (!EC_POINT_point2bn(group, point,
308 EC_GROUP_get_point_conversion_form(group),
309 ec_gen, NULL))
310 goto end;
311 if (!EC_GROUP_get_order(group, ec_order, NULL))
312 goto end;
313 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
314 goto end;
315
316 if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
317 goto end;
318
319 len = BN_num_bits(ec_order);
320
321 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
322 buf_len = tmp_len;
323 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
324 buf_len = tmp_len;
325 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
326 buf_len = tmp_len;
327 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
328 buf_len = tmp_len;
329 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
330 buf_len = tmp_len;
331 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
332 buf_len = tmp_len;
333
334 buffer = app_malloc(buf_len, "BN buffer");
335
336 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n{\n", len);
337 print_bignum_var(out, ec_p, "ec_p", len, buffer);
338 print_bignum_var(out, ec_a, "ec_a", len, buffer);
339 print_bignum_var(out, ec_b, "ec_b", len, buffer);
340 print_bignum_var(out, ec_gen, "ec_gen", len, buffer);
341 print_bignum_var(out, ec_order, "ec_order", len, buffer);
342 print_bignum_var(out, ec_cofactor, "ec_cofactor", len, buffer);
343 BIO_printf(out, " int ok = 0;\n"
344 " EC_GROUP *group = NULL;\n"
345 " EC_POINT *point = NULL;\n"
346 " BIGNUM *tmp_1 = NULL;\n"
347 " BIGNUM *tmp_2 = NULL;\n"
348 " BIGNUM *tmp_3 = NULL;\n"
349 "\n");
350
351 BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof(ec_p_%d), NULL)) == NULL)\n"
352 " goto err;\n", len, len);
353 BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof(ec_a_%d), NULL)) == NULL)\n"
354 " goto err;\n", len, len);
355 BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof(ec_b_%d), NULL)) == NULL)\n"
356 " goto err;\n", len, len);
357 BIO_printf(out, " if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n"
358 " goto err;\n"
359 "\n");
360 BIO_printf(out, " /* build generator */\n");
361 BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof(ec_gen_%d), tmp_1)) == NULL)\n"
362 " goto err;\n", len, len);
363 BIO_printf(out, " point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n");
364 BIO_printf(out, " if (point == NULL)\n"
365 " goto err;\n");
366 BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof(ec_order_%d), tmp_2)) == NULL)\n"
367 " goto err;\n", len, len);
368 BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof(ec_cofactor_%d), tmp_3)) == NULL)\n"
369 " goto err;\n", len, len);
370 BIO_printf(out, " if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n"
371 " goto err;\n"
372 "ok = 1;"
373 "\n");
374 BIO_printf(out, "err:\n"
375 " BN_free(tmp_1);\n"
376 " BN_free(tmp_2);\n"
377 " BN_free(tmp_3);\n"
378 " EC_POINT_free(point);\n"
379 " if (!ok) {\n"
380 " EC_GROUP_free(group);\n"
381 " return NULL;\n"
382 " }\n"
383 " return (group);\n"
384 "}\n");
385 }
386
387 if (outformat == FORMAT_ASN1 && genkey)
388 noout = 1;
389
390 if (!noout) {
391 if (outformat == FORMAT_ASN1)
392 i = i2d_ECPKParameters_bio(out, group);
393 else
394 i = PEM_write_bio_ECPKParameters(out, group);
395 if (!i) {
396 BIO_printf(bio_err, "unable to write elliptic "
397 "curve parameters\n");
398 ERR_print_errors(bio_err);
399 goto end;
400 }
401 }
402
403 if (genkey) {
404 EC_KEY *eckey = EC_KEY_new();
405
406 if (eckey == NULL)
407 goto end;
408
409 if (EC_KEY_set_group(eckey, group) == 0) {
410 BIO_printf(bio_err, "unable to set group when generating key\n");
411 EC_KEY_free(eckey);
412 ERR_print_errors(bio_err);
413 goto end;
414 }
415
416 if (new_form)
417 EC_KEY_set_conv_form(eckey, form);
418
419 if (!EC_KEY_generate_key(eckey)) {
420 BIO_printf(bio_err, "unable to generate key\n");
421 EC_KEY_free(eckey);
422 ERR_print_errors(bio_err);
423 goto end;
424 }
425 assert(private);
426 if (outformat == FORMAT_ASN1)
427 i = i2d_ECPrivateKey_bio(out, eckey);
428 else
429 i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
430 NULL, 0, NULL, NULL);
431 EC_KEY_free(eckey);
432 }
433
434 ret = 0;
435 end:
436 BN_free(ec_p);
437 BN_free(ec_a);
438 BN_free(ec_b);
439 BN_free(ec_gen);
440 BN_free(ec_order);
441 BN_free(ec_cofactor);
442 OPENSSL_free(buffer);
443 EC_GROUP_free(group);
444 release_engine(e);
445 BIO_free(in);
446 BIO_free_all(out);
447 return ret;
448}
449
450#endif
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