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 argc = opt_num_rest();
190 if (argc != 0)
191 goto opthelp;
192
193 if (!app_RAND_load())
194 goto end;
195
196 private = genkey ? 1 : 0;
197
198 out = bio_open_owner(outfile, outformat, private);
199 if (out == NULL)
200 goto end;
201
202 if (list_curves) {
203 if (list_builtin_curves(out))
204 ret = 0;
205 goto end;
206 }
207
208 if (curve_name != NULL) {
209 OSSL_PARAM params[4];
210 OSSL_PARAM *p = params;
211
212 if (strcmp(curve_name, "secp192r1") == 0) {
213 BIO_printf(bio_err,
214 "using curve name prime192v1 instead of secp192r1\n");
215 curve_name = SN_X9_62_prime192v1;
216 } else if (strcmp(curve_name, "secp256r1") == 0) {
217 BIO_printf(bio_err,
218 "using curve name prime256v1 instead of secp256r1\n");
219 curve_name = SN_X9_62_prime256v1;
220 }
221 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
222 curve_name, 0);
223 if (asn1_encoding != NULL)
224 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_EC_ENCODING,
225 asn1_encoding, 0);
226 if (point_format != NULL)
227 *p++ = OSSL_PARAM_construct_utf8_string(
228 OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT,
229 point_format, 0);
230 *p = OSSL_PARAM_construct_end();
231
232 if (OPENSSL_strcasecmp(curve_name, "SM2") == 0)
233 gctx_params = EVP_PKEY_CTX_new_from_name(app_get0_libctx(), "sm2",
234 app_get0_propq());
235 else
236 gctx_params = EVP_PKEY_CTX_new_from_name(app_get0_libctx(), "ec",
237 app_get0_propq());
238 if (gctx_params == NULL
239 || EVP_PKEY_keygen_init(gctx_params) <= 0
240 || EVP_PKEY_CTX_set_params(gctx_params, params) <= 0
241 || EVP_PKEY_keygen(gctx_params, ¶ms_key) <= 0) {
242 BIO_printf(bio_err, "unable to generate key\n");
243 goto end;
244 }
245 } else {
246 params_key = load_keyparams(infile, informat, 1, "EC", "EC parameters");
247 if (params_key == NULL || !EVP_PKEY_is_a(params_key, "EC"))
248 goto end;
249 if (point_format
250 && !EVP_PKEY_set_utf8_string_param(
251 params_key, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT,
252 point_format)) {
253 BIO_printf(bio_err, "unable to set point conversion format\n");
254 goto end;
255 }
256
257 if (asn1_encoding != NULL
258 && !EVP_PKEY_set_utf8_string_param(
259 params_key, OSSL_PKEY_PARAM_EC_ENCODING, asn1_encoding)) {
260 BIO_printf(bio_err, "unable to set asn1 encoding format\n");
261 goto end;
262 }
263 }
264
265 if (no_seed
266 && !EVP_PKEY_set_octet_string_param(params_key, OSSL_PKEY_PARAM_EC_SEED,
267 NULL, 0)) {
268 BIO_printf(bio_err, "unable to clear seed\n");
269 goto end;
270 }
271
272 if (text
273 && !EVP_PKEY_print_params(out, params_key, 0, NULL)) {
274 BIO_printf(bio_err, "unable to print params\n");
275 goto end;
276 }
277
278 if (check || check_named) {
279 BIO_printf(bio_err, "checking elliptic curve parameters: ");
280
281 if (check_named
282 && !EVP_PKEY_set_utf8_string_param(params_key,
283 OSSL_PKEY_PARAM_EC_GROUP_CHECK_TYPE,
284 OSSL_PKEY_EC_GROUP_CHECK_NAMED)) {
285 BIO_printf(bio_err, "unable to set check_type\n");
286 goto end;
287 }
288 pctx = EVP_PKEY_CTX_new_from_pkey(app_get0_libctx(), params_key,
289 app_get0_propq());
290 if (pctx == NULL || EVP_PKEY_param_check(pctx) <= 0) {
291 BIO_printf(bio_err, "failed\n");
292 goto end;
293 }
294 BIO_printf(bio_err, "ok\n");
295 }
296
297 if (outformat == FORMAT_ASN1 && genkey)
298 noout = 1;
299
300 if (!noout) {
301 ectx_params = OSSL_ENCODER_CTX_new_for_pkey(
302 params_key, OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS,
303 outformat == FORMAT_ASN1 ? "DER" : "PEM", NULL, NULL);
304 if (!OSSL_ENCODER_to_bio(ectx_params, out)) {
305 BIO_printf(bio_err, "unable to write elliptic curve parameters\n");
306 goto end;
307 }
308 }
309
310 if (genkey) {
311 /*
312 * NOTE: EC keygen does not normally need to pass in the param_key
313 * for named curves. This can be achieved using:
314 * gctx = EVP_PKEY_CTX_new_from_name(NULL, "EC", NULL);
315 * EVP_PKEY_keygen_init(gctx);
316 * EVP_PKEY_CTX_set_group_name(gctx, curvename);
317 * EVP_PKEY_keygen(gctx, &key) <= 0)
318 */
319 gctx_key = EVP_PKEY_CTX_new_from_pkey(app_get0_libctx(), params_key,
320 app_get0_propq());
321 if (EVP_PKEY_keygen_init(gctx_key) <= 0
322 || EVP_PKEY_keygen(gctx_key, &key) <= 0) {
323 BIO_printf(bio_err, "unable to generate key\n");
324 goto end;
325 }
326 assert(private);
327 ectx_key = OSSL_ENCODER_CTX_new_for_pkey(
328 key, OSSL_KEYMGMT_SELECT_ALL,
329 outformat == FORMAT_ASN1 ? "DER" : "PEM", NULL, NULL);
330 if (!OSSL_ENCODER_to_bio(ectx_key, out)) {
331 BIO_printf(bio_err, "unable to write elliptic "
332 "curve parameters\n");
333 goto end;
334 }
335 }
336
337 ret = 0;
338 end:
339 if (ret != 0)
340 ERR_print_errors(bio_err);
341 release_engine(e);
342 EVP_PKEY_free(params_key);
343 EVP_PKEY_free(key);
344 EVP_PKEY_CTX_free(pctx);
345 EVP_PKEY_CTX_free(gctx_params);
346 EVP_PKEY_CTX_free(gctx_key);
347 OSSL_DECODER_CTX_free(dctx_params);
348 OSSL_ENCODER_CTX_free(ectx_params);
349 OSSL_ENCODER_CTX_free(ectx_key);
350 BIO_free_all(out);
351 return ret;
352 }
353