1 /*
2 * Copyright 2002-2022 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4 *
5 * Licensed under the Apache License 2.0 (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 <string.h>
12 #include <openssl/opensslconf.h>
13 #include <openssl/evp.h>
14 #include <openssl/encoder.h>
15 #include <openssl/decoder.h>
16 #include <openssl/core_names.h>
17 #include <openssl/core_dispatch.h>
18 #include <openssl/params.h>
19 #include <openssl/err.h>
20 #include "apps.h"
21 #include "progs.h"
22 #include "ec_common.h"
23
24 typedef enum OPTION_choice {
25 OPT_COMMON,
26 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT,
27 OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME,
28 OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_ENGINE, OPT_CHECK_NAMED,
29 OPT_R_ENUM, OPT_PROV_ENUM
30 } OPTION_CHOICE;
31
32 const OPTIONS ecparam_options[] = {
33 OPT_SECTION("General"),
34 {"help", OPT_HELP, '-', "Display this summary"},
35 {"list_curves", OPT_LIST_CURVES, '-',
36 "Prints a list of all curve 'short names'"},
37 #ifndef OPENSSL_NO_ENGINE
38 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
39 #endif
40
41 {"genkey", OPT_GENKEY, '-', "Generate ec key"},
42 {"in", OPT_IN, '<', "Input file - default stdin"},
43 {"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
44 {"out", OPT_OUT, '>', "Output file - default stdout"},
45 {"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
46
47 OPT_SECTION("Output"),
48 {"text", OPT_TEXT, '-', "Print the ec parameters in text form"},
49 {"noout", OPT_NOOUT, '-', "Do not print the ec parameter"},
50 {"param_enc", OPT_PARAM_ENC, 's',
51 "Specifies the way the ec parameters are encoded"},
52
53 OPT_SECTION("Parameter"),
54 {"check", OPT_CHECK, '-', "Validate the ec parameters"},
55 {"check_named", OPT_CHECK_NAMED, '-',
56 "Check that named EC curve parameters have not been modified"},
57 {"no_seed", OPT_NO_SEED, '-',
58 "If 'explicit' parameters are chosen do not use the seed"},
59 {"name", OPT_NAME, 's',
60 "Use the ec parameters with specified 'short name'"},
61 {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
62
63 OPT_R_OPTIONS,
64 OPT_PROV_OPTIONS,
65 {NULL}
66 };
67
list_builtin_curves(BIO * out)68 static int list_builtin_curves(BIO *out)
69 {
70 int ret = 0;
71 EC_builtin_curve *curves = NULL;
72 size_t n, crv_len = EC_get_builtin_curves(NULL, 0);
73
74 curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves");
75 if (!EC_get_builtin_curves(curves, crv_len))
76 goto end;
77
78 for (n = 0; n < crv_len; n++) {
79 const char *comment = curves[n].comment;
80 const char *sname = OBJ_nid2sn(curves[n].nid);
81
82 if (comment == NULL)
83 comment = "CURVE DESCRIPTION NOT AVAILABLE";
84 if (sname == NULL)
85 sname = "";
86
87 BIO_printf(out, " %-10s: ", sname);
88 BIO_printf(out, "%s\n", comment);
89 }
90 ret = 1;
91 end:
92 OPENSSL_free(curves);
93 return ret;
94 }
95
ecparam_main(int argc,char ** argv)96 int ecparam_main(int argc, char **argv)
97 {
98 EVP_PKEY_CTX *gctx_params = NULL, *gctx_key = NULL, *pctx = NULL;
99 EVP_PKEY *params_key = NULL, *key = NULL;
100 OSSL_ENCODER_CTX *ectx_key = NULL, *ectx_params = NULL;
101 OSSL_DECODER_CTX *dctx_params = NULL;
102 ENGINE *e = NULL;
103 BIO *out = NULL;
104 char *curve_name = NULL;
105 char *asn1_encoding = NULL;
106 char *point_format = NULL;
107 char *infile = NULL, *outfile = NULL, *prog;
108 OPTION_CHOICE o;
109 int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0;
110 int ret = 1, private = 0;
111 int no_seed = 0, check = 0, check_named = 0, text = 0, genkey = 0;
112 int list_curves = 0;
113
114 prog = opt_init(argc, argv, ecparam_options);
115 while ((o = opt_next()) != OPT_EOF) {
116 switch (o) {
117 case OPT_EOF:
118 case OPT_ERR:
119 opthelp:
120 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
121 goto end;
122 case OPT_HELP:
123 opt_help(ecparam_options);
124 ret = 0;
125 goto end;
126 case OPT_INFORM:
127 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
128 goto opthelp;
129 break;
130 case OPT_IN:
131 infile = opt_arg();
132 break;
133 case OPT_OUTFORM:
134 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
135 goto opthelp;
136 break;
137 case OPT_OUT:
138 outfile = opt_arg();
139 break;
140 case OPT_TEXT:
141 text = 1;
142 break;
143 case OPT_CHECK:
144 check = 1;
145 break;
146 case OPT_CHECK_NAMED:
147 check_named = 1;
148 break;
149 case OPT_LIST_CURVES:
150 list_curves = 1;
151 break;
152 case OPT_NO_SEED:
153 no_seed = 1;
154 break;
155 case OPT_NOOUT:
156 noout = 1;
157 break;
158 case OPT_NAME:
159 curve_name = opt_arg();
160 break;
161 case OPT_CONV_FORM:
162 point_format = opt_arg();
163 if (!opt_string(point_format, point_format_options))
164 goto opthelp;
165 break;
166 case OPT_PARAM_ENC:
167 asn1_encoding = opt_arg();
168 if (!opt_string(asn1_encoding, asn1_encoding_options))
169 goto opthelp;
170 break;
171 case OPT_GENKEY:
172 genkey = 1;
173 break;
174 case OPT_R_CASES:
175 if (!opt_rand(o))
176 goto end;
177 break;
178 case OPT_PROV_CASES:
179 if (!opt_provider(o))
180 goto end;
181 break;
182 case OPT_ENGINE:
183 e = setup_engine(opt_arg(), 0);
184 break;
185 }
186 }
187
188 /* No extra args. */
189 if (!opt_check_rest_arg(NULL))
190 goto opthelp;
191
192 if (!app_RAND_load())
193 goto end;
194
195 private = genkey ? 1 : 0;
196
197 if (curve_name != NULL) {
198 OSSL_PARAM params[4];
199 OSSL_PARAM *p = params;
200
201 if (strcmp(curve_name, "secp192r1") == 0) {
202 BIO_printf(bio_err,
203 "using curve name prime192v1 instead of secp192r1\n");
204 curve_name = SN_X9_62_prime192v1;
205 } else if (strcmp(curve_name, "secp256r1") == 0) {
206 BIO_printf(bio_err,
207 "using curve name prime256v1 instead of secp256r1\n");
208 curve_name = SN_X9_62_prime256v1;
209 }
210 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
211 curve_name, 0);
212 if (asn1_encoding != NULL)
213 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_EC_ENCODING,
214 asn1_encoding, 0);
215 if (point_format != NULL)
216 *p++ = OSSL_PARAM_construct_utf8_string(
217 OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT,
218 point_format, 0);
219 *p = OSSL_PARAM_construct_end();
220
221 if (OPENSSL_strcasecmp(curve_name, "SM2") == 0)
222 gctx_params = EVP_PKEY_CTX_new_from_name(app_get0_libctx(), "sm2",
223 app_get0_propq());
224 else
225 gctx_params = EVP_PKEY_CTX_new_from_name(app_get0_libctx(), "ec",
226 app_get0_propq());
227 if (gctx_params == NULL
228 || EVP_PKEY_keygen_init(gctx_params) <= 0
229 || EVP_PKEY_CTX_set_params(gctx_params, params) <= 0
230 || EVP_PKEY_keygen(gctx_params, ¶ms_key) <= 0) {
231 BIO_printf(bio_err, "unable to generate key\n");
232 goto end;
233 }
234 } else {
235 params_key = load_keyparams_suppress(infile, informat, 1, "EC",
236 "EC parameters", 1);
237 if (params_key == NULL)
238 params_key = load_keyparams_suppress(infile, informat, 1, "SM2",
239 "SM2 parameters", 1);
240
241 if (params_key == NULL) {
242 BIO_printf(bio_err, "Unable to load parameters from %s\n", infile);
243 goto end;
244 }
245
246 if (point_format
247 && !EVP_PKEY_set_utf8_string_param(
248 params_key, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT,
249 point_format)) {
250 BIO_printf(bio_err, "unable to set point conversion format\n");
251 goto end;
252 }
253
254 if (asn1_encoding != NULL
255 && !EVP_PKEY_set_utf8_string_param(
256 params_key, OSSL_PKEY_PARAM_EC_ENCODING, asn1_encoding)) {
257 BIO_printf(bio_err, "unable to set asn1 encoding format\n");
258 goto end;
259 }
260 }
261
262 if (no_seed
263 && !EVP_PKEY_set_octet_string_param(params_key, OSSL_PKEY_PARAM_EC_SEED,
264 NULL, 0)) {
265 BIO_printf(bio_err, "unable to clear seed\n");
266 goto end;
267 }
268
269 out = bio_open_owner(outfile, outformat, private);
270 if (out == NULL)
271 goto end;
272
273 if (list_curves) {
274 if (list_builtin_curves(out))
275 ret = 0;
276 goto end;
277 }
278
279 if (text
280 && EVP_PKEY_print_params(out, params_key, 0, NULL) <= 0) {
281 BIO_printf(bio_err, "unable to print params\n");
282 goto end;
283 }
284
285 if (check || check_named) {
286 BIO_printf(bio_err, "checking elliptic curve parameters: ");
287
288 if (check_named
289 && !EVP_PKEY_set_utf8_string_param(params_key,
290 OSSL_PKEY_PARAM_EC_GROUP_CHECK_TYPE,
291 OSSL_PKEY_EC_GROUP_CHECK_NAMED)) {
292 BIO_printf(bio_err, "unable to set check_type\n");
293 goto end;
294 }
295 pctx = EVP_PKEY_CTX_new_from_pkey(app_get0_libctx(), params_key,
296 app_get0_propq());
297 if (pctx == NULL || EVP_PKEY_param_check(pctx) <= 0) {
298 BIO_printf(bio_err, "failed\n");
299 goto end;
300 }
301 BIO_printf(bio_err, "ok\n");
302 }
303
304 if (outformat == FORMAT_ASN1 && genkey)
305 noout = 1;
306
307 if (!noout) {
308 ectx_params = OSSL_ENCODER_CTX_new_for_pkey(
309 params_key, OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS,
310 outformat == FORMAT_ASN1 ? "DER" : "PEM", NULL, NULL);
311 if (!OSSL_ENCODER_to_bio(ectx_params, out)) {
312 BIO_printf(bio_err, "unable to write elliptic curve parameters\n");
313 goto end;
314 }
315 }
316
317 if (genkey) {
318 /*
319 * NOTE: EC keygen does not normally need to pass in the param_key
320 * for named curves. This can be achieved using:
321 * gctx = EVP_PKEY_CTX_new_from_name(NULL, "EC", NULL);
322 * EVP_PKEY_keygen_init(gctx);
323 * EVP_PKEY_CTX_set_group_name(gctx, curvename);
324 * EVP_PKEY_keygen(gctx, &key) <= 0)
325 */
326 gctx_key = EVP_PKEY_CTX_new_from_pkey(app_get0_libctx(), params_key,
327 app_get0_propq());
328 if (EVP_PKEY_keygen_init(gctx_key) <= 0
329 || EVP_PKEY_keygen(gctx_key, &key) <= 0) {
330 BIO_printf(bio_err, "unable to generate key\n");
331 goto end;
332 }
333 assert(private);
334 ectx_key = OSSL_ENCODER_CTX_new_for_pkey(
335 key, OSSL_KEYMGMT_SELECT_ALL,
336 outformat == FORMAT_ASN1 ? "DER" : "PEM", NULL, NULL);
337 if (!OSSL_ENCODER_to_bio(ectx_key, out)) {
338 BIO_printf(bio_err, "unable to write elliptic "
339 "curve parameters\n");
340 goto end;
341 }
342 }
343
344 ret = 0;
345 end:
346 if (ret != 0)
347 ERR_print_errors(bio_err);
348 release_engine(e);
349 EVP_PKEY_free(params_key);
350 EVP_PKEY_free(key);
351 EVP_PKEY_CTX_free(pctx);
352 EVP_PKEY_CTX_free(gctx_params);
353 EVP_PKEY_CTX_free(gctx_key);
354 OSSL_DECODER_CTX_free(dctx_params);
355 OSSL_ENCODER_CTX_free(ectx_params);
356 OSSL_ENCODER_CTX_free(ectx_key);
357 BIO_free_all(out);
358 return ret;
359 }
360
