2 * Copyright 2002-2018 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
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>
29 typedef 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
,
37 const 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"},
58 # ifndef OPENSSL_NO_ENGINE
59 {"engine", OPT_ENGINE
, 's', "Use engine, possibly a hardware device"},
64 static OPT_PAIR forms
[] = {
65 {"compressed", POINT_CONVERSION_COMPRESSED
},
66 {"uncompressed", POINT_CONVERSION_UNCOMPRESSED
},
67 {"hybrid", POINT_CONVERSION_HYBRID
},
71 static OPT_PAIR encodings
[] = {
72 {"named_curve", OPENSSL_EC_NAMED_CURVE
},
77 int ecparam_main(int argc
, char **argv
)
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
;
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;
95 prog
= opt_init(argc
, argv
, ecparam_options
);
96 while ((o
= opt_next()) != OPT_EOF
) {
101 BIO_printf(bio_err
, "%s: Use -help for summary.\n", prog
);
104 opt_help(ecparam_options
);
108 if (!opt_format(opt_arg(), OPT_FMT_PEMDER
, &informat
))
115 if (!opt_format(opt_arg(), OPT_FMT_PEMDER
, &outformat
))
130 case OPT_LIST_CURVES
:
140 curve_name
= opt_arg();
143 if (!opt_pair(opt_arg(), forms
, &new_form
))
149 if (!opt_pair(opt_arg(), encodings
, &asn1_flag
))
161 e
= setup_engine(opt_arg(), 0);
165 argc
= opt_num_rest();
169 private = genkey
? 1 : 0;
171 in
= bio_open_default(infile
, 'r', informat
);
174 out
= bio_open_owner(outfile
, outformat
, private);
179 EC_builtin_curve
*curves
= NULL
;
180 size_t crv_len
= EC_get_builtin_curves(NULL
, 0);
183 curves
= app_malloc((int)sizeof(*curves
) * crv_len
, "list curves");
184 if (!EC_get_builtin_curves(curves
, crv_len
)) {
185 OPENSSL_free(curves
);
189 for (n
= 0; n
< crv_len
; n
++) {
192 comment
= curves
[n
].comment
;
193 sname
= OBJ_nid2sn(curves
[n
].nid
);
195 comment
= "CURVE DESCRIPTION NOT AVAILABLE";
199 BIO_printf(out
, " %-10s: ", sname
);
200 BIO_printf(out
, "%s\n", comment
);
203 OPENSSL_free(curves
);
208 if (curve_name
!= NULL
) {
212 * workaround for the SECG curve names secp192r1 and secp256r1 (which
213 * are the same as the curves prime192v1 and prime256v1 defined in
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
;
225 nid
= OBJ_sn2nid(curve_name
);
229 nid
= EC_curve_nist2nid(curve_name
);
232 BIO_printf(bio_err
, "unknown curve name (%s)\n", curve_name
);
236 group
= EC_GROUP_new_by_curve_name(nid
);
238 BIO_printf(bio_err
, "unable to create curve (%s)\n", curve_name
);
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
);
246 group
= PEM_read_bio_ECPKParameters(in
, NULL
, NULL
, NULL
);
249 BIO_printf(bio_err
, "unable to load elliptic curve parameters\n");
250 ERR_print_errors(bio_err
);
255 EC_GROUP_set_point_conversion_form(group
, form
);
258 EC_GROUP_set_asn1_flag(group
, asn1_flag
);
261 EC_GROUP_set_seed(group
, NULL
, 0);
265 if (!ECPKParameters_print(out
, group
, 0))
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
);
276 BIO_printf(bio_err
, "ok\n");
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
);
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");
296 is_prime
= (EC_METHOD_get_field_type(meth
) == NID_X9_62_prime_field
);
298 BIO_printf(bio_err
, "Can only handle X9.62 prime fields\n");
302 if (!EC_GROUP_get_curve(group
, ec_p
, ec_a
, ec_b
, NULL
))
305 if ((point
= EC_GROUP_get0_generator(group
)) == NULL
)
307 if (!EC_POINT_point2bn(group
, point
,
308 EC_GROUP_get_point_conversion_form(group
),
311 if (!EC_GROUP_get_order(group
, ec_order
, NULL
))
313 if (!EC_GROUP_get_cofactor(group
, ec_cofactor
, NULL
))
316 if (!ec_p
|| !ec_a
|| !ec_b
|| !ec_gen
|| !ec_order
|| !ec_cofactor
)
319 len
= BN_num_bits(ec_order
);
321 if ((tmp_len
= (size_t)BN_num_bytes(ec_p
)) > buf_len
)
323 if ((tmp_len
= (size_t)BN_num_bytes(ec_a
)) > buf_len
)
325 if ((tmp_len
= (size_t)BN_num_bytes(ec_b
)) > buf_len
)
327 if ((tmp_len
= (size_t)BN_num_bytes(ec_gen
)) > buf_len
)
329 if ((tmp_len
= (size_t)BN_num_bytes(ec_order
)) > buf_len
)
331 if ((tmp_len
= (size_t)BN_num_bytes(ec_cofactor
)) > buf_len
)
334 buffer
= app_malloc(buf_len
, "BN buffer");
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"
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"
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"
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"
374 BIO_printf(out
, "err:\n"
378 " EC_POINT_free(point);\n"
380 " EC_GROUP_free(group);\n"
387 if (outformat
== FORMAT_ASN1
&& genkey
)
391 if (outformat
== FORMAT_ASN1
)
392 i
= i2d_ECPKParameters_bio(out
, group
);
394 i
= PEM_write_bio_ECPKParameters(out
, group
);
396 BIO_printf(bio_err
, "unable to write elliptic "
397 "curve parameters\n");
398 ERR_print_errors(bio_err
);
404 EC_KEY
*eckey
= EC_KEY_new();
409 if (EC_KEY_set_group(eckey
, group
) == 0) {
410 BIO_printf(bio_err
, "unable to set group when generating key\n");
412 ERR_print_errors(bio_err
);
417 EC_KEY_set_conv_form(eckey
, form
);
419 if (!EC_KEY_generate_key(eckey
)) {
420 BIO_printf(bio_err
, "unable to generate key\n");
422 ERR_print_errors(bio_err
);
426 if (outformat
== FORMAT_ASN1
)
427 i
= i2d_ECPrivateKey_bio(out
, eckey
);
429 i
= PEM_write_bio_ECPrivateKey(out
, eckey
, NULL
,
430 NULL
, 0, NULL
, NULL
);
441 BN_free(ec_cofactor
);
442 OPENSSL_free(buffer
);
443 EC_GROUP_free(group
);