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source: vbox/trunk/src/libs/openssl-1.1.1l/apps/ecparam.c@ 95000

Last change on this file since 95000 was 91772, checked in by vboxsync, 3 years ago

openssl-1.1.1l: Applied and adjusted our OpenSSL changes to 1.1.1l. bugref:10126
File size: 14.7 KB
Line 
1/*
2 * Copyright 2002-2020 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#include <stdio.h>
13#include <stdlib.h>
14#include <time.h>
15#include <string.h>
16#include "apps.h"
17#include "progs.h"
18#include <openssl/bio.h>
19#include <openssl/err.h>
20#include <openssl/bn.h>
21#include <openssl/ec.h>
22#include <openssl/x509.h>
23#include <openssl/pem.h>
24
25typedef enum OPTION_choice {
26 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
27 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
28 OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME,
29 OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_ENGINE,
30 OPT_R_ENUM
31} OPTION_CHOICE;
32
33const OPTIONS ecparam_options[] = {
34 {"help", OPT_HELP, '-', "Display this summary"},
35 {"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
36 {"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
37 {"in", OPT_IN, '<', "Input file - default stdin"},
38 {"out", OPT_OUT, '>', "Output file - default stdout"},
39 {"text", OPT_TEXT, '-', "Print the ec parameters in text form"},
40 {"C", OPT_C, '-', "Print a 'C' function creating the parameters"},
41 {"check", OPT_CHECK, '-', "Validate the ec parameters"},
42 {"list_curves", OPT_LIST_CURVES, '-',
43 "Prints a list of all curve 'short names'"},
44 {"no_seed", OPT_NO_SEED, '-',
45 "If 'explicit' parameters are chosen do not use the seed"},
46 {"noout", OPT_NOOUT, '-', "Do not print the ec parameter"},
47 {"name", OPT_NAME, 's',
48 "Use the ec parameters with specified 'short name'"},
49 {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
50 {"param_enc", OPT_PARAM_ENC, 's',
51 "Specifies the way the ec parameters are encoded"},
52 {"genkey", OPT_GENKEY, '-', "Generate ec key"},
53 OPT_R_OPTIONS,
54#ifndef OPENSSL_NO_ENGINE
55 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
56#endif
57 {NULL}
58};
59
60static OPT_PAIR forms[] = {
61 {"compressed", POINT_CONVERSION_COMPRESSED},
62 {"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
63 {"hybrid", POINT_CONVERSION_HYBRID},
64 {NULL}
65};
66
67static OPT_PAIR encodings[] = {
68 {"named_curve", OPENSSL_EC_NAMED_CURVE},
69 {"explicit", 0},
70 {NULL}
71};
72
73int ecparam_main(int argc, char **argv)
74{
75 ENGINE *e = NULL;
76 BIGNUM *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
77 BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL;
78 BIO *in = NULL, *out = NULL;
79 EC_GROUP *group = NULL;
80 point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
81 char *curve_name = NULL;
82 char *infile = NULL, *outfile = NULL, *prog;
83 unsigned char *buffer = NULL;
84 OPTION_CHOICE o;
85 int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_asn1_flag = 0;
86 int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
87 int ret = 1, private = 0;
88 int list_curves = 0, no_seed = 0, check = 0, new_form = 0;
89 int text = 0, i, genkey = 0;
90
91 prog = opt_init(argc, argv, ecparam_options);
92 while ((o = opt_next()) != OPT_EOF) {
93 switch (o) {
94 case OPT_EOF:
95 case OPT_ERR:
96 opthelp:
97 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
98 goto end;
99 case OPT_HELP:
100 opt_help(ecparam_options);
101 ret = 0;
102 goto end;
103 case OPT_INFORM:
104 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
105 goto opthelp;
106 break;
107 case OPT_IN:
108 infile = opt_arg();
109 break;
110 case OPT_OUTFORM:
111 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
112 goto opthelp;
113 break;
114 case OPT_OUT:
115 outfile = opt_arg();
116 break;
117 case OPT_TEXT:
118 text = 1;
119 break;
120 case OPT_C:
121 C = 1;
122 break;
123 case OPT_CHECK:
124 check = 1;
125 break;
126 case OPT_LIST_CURVES:
127 list_curves = 1;
128 break;
129 case OPT_NO_SEED:
130 no_seed = 1;
131 break;
132 case OPT_NOOUT:
133 noout = 1;
134 break;
135 case OPT_NAME:
136 curve_name = opt_arg();
137 break;
138 case OPT_CONV_FORM:
139 if (!opt_pair(opt_arg(), forms, &new_form))
140 goto opthelp;
141 form = new_form;
142 new_form = 1;
143 break;
144 case OPT_PARAM_ENC:
145 if (!opt_pair(opt_arg(), encodings, &asn1_flag))
146 goto opthelp;
147 new_asn1_flag = 1;
148 break;
149 case OPT_GENKEY:
150 genkey = 1;
151 break;
152 case OPT_R_CASES:
153 if (!opt_rand(o))
154 goto end;
155 break;
156 case OPT_ENGINE:
157 e = setup_engine(opt_arg(), 0);
158 break;
159 }
160 }
161 argc = opt_num_rest();
162 if (argc != 0)
163 goto opthelp;
164
165 private = genkey ? 1 : 0;
166
167 in = bio_open_default(infile, 'r', informat);
168 if (in == NULL)
169 goto end;
170 out = bio_open_owner(outfile, outformat, private);
171 if (out == NULL)
172 goto end;
173
174 if (list_curves) {
175 EC_builtin_curve *curves = NULL;
176 size_t crv_len = EC_get_builtin_curves(NULL, 0);
177 size_t n;
178
179 curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves");
180 if (!EC_get_builtin_curves(curves, crv_len)) {
181 OPENSSL_free(curves);
182 goto end;
183 }
184
185 for (n = 0; n < crv_len; n++) {
186 const char *comment;
187 const char *sname;
188 comment = curves[n].comment;
189 sname = OBJ_nid2sn(curves[n].nid);
190 if (comment == NULL)
191 comment = "CURVE DESCRIPTION NOT AVAILABLE";
192 if (sname == NULL)
193 sname = "";
194
195 BIO_printf(out, " %-10s: ", sname);
196 BIO_printf(out, "%s\n", comment);
197 }
198
199 OPENSSL_free(curves);
200 ret = 0;
201 goto end;
202 }
203
204 if (curve_name != NULL) {
205 int nid;
206
207 /*
208 * workaround for the SECG curve names secp192r1 and secp256r1 (which
209 * are the same as the curves prime192v1 and prime256v1 defined in
210 * X9.62)
211 */
212 if (strcmp(curve_name, "secp192r1") == 0) {
213 BIO_printf(bio_err, "using curve name prime192v1 "
214 "instead of secp192r1\n");
215 nid = NID_X9_62_prime192v1;
216 } else if (strcmp(curve_name, "secp256r1") == 0) {
217 BIO_printf(bio_err, "using curve name prime256v1 "
218 "instead of secp256r1\n");
219 nid = NID_X9_62_prime256v1;
220 } else {
221 nid = OBJ_sn2nid(curve_name);
222 }
223
224 if (nid == 0)
225 nid = EC_curve_nist2nid(curve_name);
226
227 if (nid == 0) {
228 BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
229 goto end;
230 }
231
232 group = EC_GROUP_new_by_curve_name(nid);
233 if (group == NULL) {
234 BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
235 goto end;
236 }
237 EC_GROUP_set_asn1_flag(group, asn1_flag);
238 EC_GROUP_set_point_conversion_form(group, form);
239 } else if (informat == FORMAT_ASN1) {
240 group = d2i_ECPKParameters_bio(in, NULL);
241 } else {
242 group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
243 }
244 if (group == NULL) {
245 BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
246 ERR_print_errors(bio_err);
247 goto end;
248 }
249
250 if (new_form)
251 EC_GROUP_set_point_conversion_form(group, form);
252
253 if (new_asn1_flag)
254 EC_GROUP_set_asn1_flag(group, asn1_flag);
255
256 if (no_seed) {
257 EC_GROUP_set_seed(group, NULL, 0);
258 }
259
260 if (text) {
261 if (!ECPKParameters_print(out, group, 0))
262 goto end;
263 }
264
265 if (check) {
266 BIO_printf(bio_err, "checking elliptic curve parameters: ");
267 if (!EC_GROUP_check(group, NULL)) {
268 BIO_printf(bio_err, "failed\n");
269 ERR_print_errors(bio_err);
270 goto end;
271 }
272 BIO_printf(bio_err, "ok\n");
273
274 }
275
276 if (C) {
277 size_t buf_len = 0, tmp_len = 0;
278 const EC_POINT *point;
279 int is_prime, len = 0;
280 const EC_METHOD *meth = EC_GROUP_method_of(group);
281
282 if ((ec_p = BN_new()) == NULL
283 || (ec_a = BN_new()) == NULL
284 || (ec_b = BN_new()) == NULL
285 || (ec_gen = BN_new()) == NULL
286 || (ec_order = BN_new()) == NULL
287 || (ec_cofactor = BN_new()) == NULL) {
288 perror("Can't allocate BN");
289 goto end;
290 }
291
292 is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
293 if (!is_prime) {
294 BIO_printf(bio_err, "Can only handle X9.62 prime fields\n");
295 goto end;
296 }
297
298 if (!EC_GROUP_get_curve(group, ec_p, ec_a, ec_b, NULL))
299 goto end;
300
301 if ((point = EC_GROUP_get0_generator(group)) == NULL)
302 goto end;
303 if (!EC_POINT_point2bn(group, point,
304 EC_GROUP_get_point_conversion_form(group),
305 ec_gen, NULL))
306 goto end;
307 if (!EC_GROUP_get_order(group, ec_order, NULL))
308 goto end;
309 if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
310 goto end;
311
312 if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
313 goto end;
314
315 len = BN_num_bits(ec_order);
316
317 if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
318 buf_len = tmp_len;
319 if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
320 buf_len = tmp_len;
321 if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
322 buf_len = tmp_len;
323 if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
324 buf_len = tmp_len;
325 if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
326 buf_len = tmp_len;
327 if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
328 buf_len = tmp_len;
329
330 buffer = app_malloc(buf_len, "BN buffer");
331
332 BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n{\n", len);
333 print_bignum_var(out, ec_p, "ec_p", len, buffer);
334 print_bignum_var(out, ec_a, "ec_a", len, buffer);
335 print_bignum_var(out, ec_b, "ec_b", len, buffer);
336 print_bignum_var(out, ec_gen, "ec_gen", len, buffer);
337 print_bignum_var(out, ec_order, "ec_order", len, buffer);
338 print_bignum_var(out, ec_cofactor, "ec_cofactor", len, buffer);
339 BIO_printf(out, " int ok = 0;\n"
340 " EC_GROUP *group = NULL;\n"
341 " EC_POINT *point = NULL;\n"
342 " BIGNUM *tmp_1 = NULL;\n"
343 " BIGNUM *tmp_2 = NULL;\n"
344 " BIGNUM *tmp_3 = NULL;\n"
345 "\n");
346
347 BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof(ec_p_%d), NULL)) == NULL)\n"
348 " goto err;\n", len, len);
349 BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof(ec_a_%d), NULL)) == NULL)\n"
350 " goto err;\n", len, len);
351 BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof(ec_b_%d), NULL)) == NULL)\n"
352 " goto err;\n", len, len);
353 BIO_printf(out, " if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n"
354 " goto err;\n"
355 "\n");
356 BIO_printf(out, " /* build generator */\n");
357 BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof(ec_gen_%d), tmp_1)) == NULL)\n"
358 " goto err;\n", len, len);
359 BIO_printf(out, " point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n");
360 BIO_printf(out, " if (point == NULL)\n"
361 " goto err;\n");
362 BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof(ec_order_%d), tmp_2)) == NULL)\n"
363 " goto err;\n", len, len);
364 BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof(ec_cofactor_%d), tmp_3)) == NULL)\n"
365 " goto err;\n", len, len);
366 BIO_printf(out, " if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n"
367 " goto err;\n"
368 "ok = 1;"
369 "\n");
370 BIO_printf(out, "err:\n"
371 " BN_free(tmp_1);\n"
372 " BN_free(tmp_2);\n"
373 " BN_free(tmp_3);\n"
374 " EC_POINT_free(point);\n"
375 " if (!ok) {\n"
376 " EC_GROUP_free(group);\n"
377 " return NULL;\n"
378 " }\n"
379 " return (group);\n"
380 "}\n");
381 }
382
383 if (outformat == FORMAT_ASN1 && genkey)
384 noout = 1;
385
386 if (!noout) {
387 if (outformat == FORMAT_ASN1)
388 i = i2d_ECPKParameters_bio(out, group);
389 else
390 i = PEM_write_bio_ECPKParameters(out, group);
391 if (!i) {
392 BIO_printf(bio_err, "unable to write elliptic "
393 "curve parameters\n");
394 ERR_print_errors(bio_err);
395 goto end;
396 }
397 }
398
399 if (genkey) {
400 EC_KEY *eckey = EC_KEY_new();
401
402 if (eckey == NULL)
403 goto end;
404
405 if (EC_KEY_set_group(eckey, group) == 0) {
406 BIO_printf(bio_err, "unable to set group when generating key\n");
407 EC_KEY_free(eckey);
408 ERR_print_errors(bio_err);
409 goto end;
410 }
411
412 if (new_form)
413 EC_KEY_set_conv_form(eckey, form);
414
415 if (!EC_KEY_generate_key(eckey)) {
416 BIO_printf(bio_err, "unable to generate key\n");
417 EC_KEY_free(eckey);
418 ERR_print_errors(bio_err);
419 goto end;
420 }
421 assert(private);
422 if (outformat == FORMAT_ASN1)
423 i = i2d_ECPrivateKey_bio(out, eckey);
424 else
425 i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
426 NULL, 0, NULL, NULL);
427 EC_KEY_free(eckey);
428 }
429
430 ret = 0;
431 end:
432 BN_free(ec_p);
433 BN_free(ec_a);
434 BN_free(ec_b);
435 BN_free(ec_gen);
436 BN_free(ec_order);
437 BN_free(ec_cofactor);
438 OPENSSL_free(buffer);
439 EC_GROUP_free(group);
440 release_engine(e);
441 BIO_free(in);
442 BIO_free_all(out);
443 return ret;
444}
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