2 * Copyright 2002-2017 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
21 # include <openssl/bio.h>
22 # include <openssl/err.h>
23 # include <openssl/bn.h>
24 # include <openssl/ec.h>
25 # include <openssl/x509.h>
26 # include <openssl/pem.h>
28 typedef enum OPTION_choice
{
29 OPT_ERR
= -1, OPT_EOF
= 0, OPT_HELP
,
30 OPT_INFORM
, OPT_OUTFORM
, OPT_IN
, OPT_OUT
, OPT_TEXT
, OPT_C
,
31 OPT_CHECK
, OPT_LIST_CURVES
, OPT_NO_SEED
, OPT_NOOUT
, OPT_NAME
,
32 OPT_CONV_FORM
, OPT_PARAM_ENC
, OPT_GENKEY
, OPT_ENGINE
,
36 const OPTIONS ecparam_options
[] = {
37 {"help", OPT_HELP
, '-', "Display this summary"},
38 {"inform", OPT_INFORM
, 'F', "Input format - default PEM (DER or PEM)"},
39 {"outform", OPT_OUTFORM
, 'F', "Output format - default PEM"},
40 {"in", OPT_IN
, '<', "Input file - default stdin"},
41 {"out", OPT_OUT
, '>', "Output file - default stdout"},
42 {"text", OPT_TEXT
, '-', "Print the ec parameters in text form"},
43 {"C", OPT_C
, '-', "Print a 'C' function creating the parameters"},
44 {"check", OPT_CHECK
, '-', "Validate the ec parameters"},
45 {"list_curves", OPT_LIST_CURVES
, '-',
46 "Prints a list of all curve 'short names'"},
47 {"no_seed", OPT_NO_SEED
, '-',
48 "If 'explicit' parameters are chosen do not use the seed"},
49 {"noout", OPT_NOOUT
, '-', "Do not print the ec parameter"},
50 {"name", OPT_NAME
, 's',
51 "Use the ec parameters with specified 'short name'"},
52 {"conv_form", OPT_CONV_FORM
, 's', "Specifies the point conversion form "},
53 {"param_enc", OPT_PARAM_ENC
, 's',
54 "Specifies the way the ec parameters are encoded"},
55 {"genkey", OPT_GENKEY
, '-', "Generate ec key"},
57 # ifndef OPENSSL_NO_ENGINE
58 {"engine", OPT_ENGINE
, 's', "Use engine, possibly a hardware device"},
63 static OPT_PAIR forms
[] = {
64 {"compressed", POINT_CONVERSION_COMPRESSED
},
65 {"uncompressed", POINT_CONVERSION_UNCOMPRESSED
},
66 {"hybrid", POINT_CONVERSION_HYBRID
},
70 static OPT_PAIR encodings
[] = {
71 {"named_curve", OPENSSL_EC_NAMED_CURVE
},
76 int ecparam_main(int argc
, char **argv
)
79 BIGNUM
*ec_gen
= NULL
, *ec_order
= NULL
, *ec_cofactor
= NULL
;
80 BIGNUM
*ec_p
= NULL
, *ec_a
= NULL
, *ec_b
= NULL
;
81 BIO
*in
= NULL
, *out
= NULL
;
82 EC_GROUP
*group
= NULL
;
83 point_conversion_form_t form
= POINT_CONVERSION_UNCOMPRESSED
;
84 char *curve_name
= NULL
;
85 char *infile
= NULL
, *outfile
= NULL
, *prog
;
86 unsigned char *buffer
= NULL
;
88 int asn1_flag
= OPENSSL_EC_NAMED_CURVE
, new_asn1_flag
= 0;
89 int informat
= FORMAT_PEM
, outformat
= FORMAT_PEM
, noout
= 0, C
= 0;
90 int ret
= 1, private = 0;
91 int list_curves
= 0, no_seed
= 0, check
= 0, new_form
= 0;
92 int text
= 0, i
, genkey
= 0;
94 prog
= opt_init(argc
, argv
, ecparam_options
);
95 while ((o
= opt_next()) != OPT_EOF
) {
100 BIO_printf(bio_err
, "%s: Use -help for summary.\n", prog
);
103 opt_help(ecparam_options
);
107 if (!opt_format(opt_arg(), OPT_FMT_PEMDER
, &informat
))
114 if (!opt_format(opt_arg(), OPT_FMT_PEMDER
, &outformat
))
129 case OPT_LIST_CURVES
:
139 curve_name
= opt_arg();
142 if (!opt_pair(opt_arg(), forms
, &new_form
))
148 if (!opt_pair(opt_arg(), encodings
, &asn1_flag
))
160 e
= setup_engine(opt_arg(), 0);
164 argc
= opt_num_rest();
168 private = genkey
? 1 : 0;
170 in
= bio_open_default(infile
, 'r', informat
);
173 out
= bio_open_owner(outfile
, outformat
, private);
178 EC_builtin_curve
*curves
= NULL
;
179 size_t crv_len
= EC_get_builtin_curves(NULL
, 0);
182 curves
= app_malloc((int)sizeof(*curves
) * crv_len
, "list curves");
183 if (!EC_get_builtin_curves(curves
, crv_len
)) {
184 OPENSSL_free(curves
);
188 for (n
= 0; n
< crv_len
; n
++) {
191 comment
= curves
[n
].comment
;
192 sname
= OBJ_nid2sn(curves
[n
].nid
);
194 comment
= "CURVE DESCRIPTION NOT AVAILABLE";
198 BIO_printf(out
, " %-10s: ", sname
);
199 BIO_printf(out
, "%s\n", comment
);
202 OPENSSL_free(curves
);
207 if (curve_name
!= NULL
) {
211 * workaround for the SECG curve names secp192r1 and secp256r1 (which
212 * are the same as the curves prime192v1 and prime256v1 defined in
215 if (strcmp(curve_name
, "secp192r1") == 0) {
216 BIO_printf(bio_err
, "using curve name prime192v1 "
217 "instead of secp192r1\n");
218 nid
= NID_X9_62_prime192v1
;
219 } else if (strcmp(curve_name
, "secp256r1") == 0) {
220 BIO_printf(bio_err
, "using curve name prime256v1 "
221 "instead of secp256r1\n");
222 nid
= NID_X9_62_prime256v1
;
224 nid
= OBJ_sn2nid(curve_name
);
228 nid
= EC_curve_nist2nid(curve_name
);
231 BIO_printf(bio_err
, "unknown curve name (%s)\n", curve_name
);
235 group
= EC_GROUP_new_by_curve_name(nid
);
237 BIO_printf(bio_err
, "unable to create curve (%s)\n", curve_name
);
240 EC_GROUP_set_asn1_flag(group
, asn1_flag
);
241 EC_GROUP_set_point_conversion_form(group
, form
);
242 } else if (informat
== FORMAT_ASN1
) {
243 group
= d2i_ECPKParameters_bio(in
, NULL
);
245 group
= PEM_read_bio_ECPKParameters(in
, NULL
, NULL
, NULL
);
248 BIO_printf(bio_err
, "unable to load elliptic curve parameters\n");
249 ERR_print_errors(bio_err
);
254 EC_GROUP_set_point_conversion_form(group
, form
);
257 EC_GROUP_set_asn1_flag(group
, asn1_flag
);
260 EC_GROUP_set_seed(group
, NULL
, 0);
264 if (!ECPKParameters_print(out
, group
, 0))
269 BIO_printf(bio_err
, "checking elliptic curve parameters: ");
270 if (!EC_GROUP_check(group
, NULL
)) {
271 BIO_printf(bio_err
, "failed\n");
272 ERR_print_errors(bio_err
);
275 BIO_printf(bio_err
, "ok\n");
280 size_t buf_len
= 0, tmp_len
= 0;
281 const EC_POINT
*point
;
282 int is_prime
, len
= 0;
283 const EC_METHOD
*meth
= EC_GROUP_method_of(group
);
285 if ((ec_p
= BN_new()) == NULL
286 || (ec_a
= BN_new()) == NULL
287 || (ec_b
= BN_new()) == NULL
288 || (ec_gen
= BN_new()) == NULL
289 || (ec_order
= BN_new()) == NULL
290 || (ec_cofactor
= BN_new()) == NULL
) {
291 perror("Can't allocate BN");
295 is_prime
= (EC_METHOD_get_field_type(meth
) == NID_X9_62_prime_field
);
297 BIO_printf(bio_err
, "Can only handle X9.62 prime fields\n");
301 if (!EC_GROUP_get_curve_GFp(group
, ec_p
, ec_a
, ec_b
, NULL
))
304 if ((point
= EC_GROUP_get0_generator(group
)) == NULL
)
306 if (!EC_POINT_point2bn(group
, point
,
307 EC_GROUP_get_point_conversion_form(group
),
310 if (!EC_GROUP_get_order(group
, ec_order
, NULL
))
312 if (!EC_GROUP_get_cofactor(group
, ec_cofactor
, NULL
))
315 if (!ec_p
|| !ec_a
|| !ec_b
|| !ec_gen
|| !ec_order
|| !ec_cofactor
)
318 len
= BN_num_bits(ec_order
);
320 if ((tmp_len
= (size_t)BN_num_bytes(ec_p
)) > buf_len
)
322 if ((tmp_len
= (size_t)BN_num_bytes(ec_a
)) > buf_len
)
324 if ((tmp_len
= (size_t)BN_num_bytes(ec_b
)) > buf_len
)
326 if ((tmp_len
= (size_t)BN_num_bytes(ec_gen
)) > buf_len
)
328 if ((tmp_len
= (size_t)BN_num_bytes(ec_order
)) > buf_len
)
330 if ((tmp_len
= (size_t)BN_num_bytes(ec_cofactor
)) > buf_len
)
333 buffer
= app_malloc(buf_len
, "BN buffer");
335 BIO_printf(out
, "EC_GROUP *get_ec_group_%d(void)\n{\n", len
);
336 print_bignum_var(out
, ec_p
, "ec_p", len
, buffer
);
337 print_bignum_var(out
, ec_a
, "ec_a", len
, buffer
);
338 print_bignum_var(out
, ec_b
, "ec_b", len
, buffer
);
339 print_bignum_var(out
, ec_gen
, "ec_gen", len
, buffer
);
340 print_bignum_var(out
, ec_order
, "ec_order", len
, buffer
);
341 print_bignum_var(out
, ec_cofactor
, "ec_cofactor", len
, buffer
);
342 BIO_printf(out
, " int ok = 0;\n"
343 " EC_GROUP *group = NULL;\n"
344 " EC_POINT *point = NULL;\n"
345 " BIGNUM *tmp_1 = NULL;\n"
346 " BIGNUM *tmp_2 = NULL;\n"
347 " BIGNUM *tmp_3 = NULL;\n"
350 BIO_printf(out
, " if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof (ec_p_%d), NULL)) == NULL)\n"
351 " goto err;\n", len
, len
);
352 BIO_printf(out
, " if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof (ec_a_%d), NULL)) == NULL)\n"
353 " goto err;\n", len
, len
);
354 BIO_printf(out
, " if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof (ec_b_%d), NULL)) == NULL)\n"
355 " goto err;\n", len
, len
);
356 BIO_printf(out
, " if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n"
359 BIO_printf(out
, " /* build generator */\n");
360 BIO_printf(out
, " if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof (ec_gen_%d), tmp_1)) == NULL)\n"
361 " goto err;\n", len
, len
);
362 BIO_printf(out
, " point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n");
363 BIO_printf(out
, " if (point == NULL)\n"
365 BIO_printf(out
, " if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof (ec_order_%d), tmp_2)) == NULL)\n"
366 " goto err;\n", len
, len
);
367 BIO_printf(out
, " if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof (ec_cofactor_%d), tmp_3)) == NULL)\n"
368 " goto err;\n", len
, len
);
369 BIO_printf(out
, " if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n"
373 BIO_printf(out
, "err:\n"
377 " EC_POINT_free(point);\n"
379 " EC_GROUP_free(group);\n"
387 if (outformat
== FORMAT_ASN1
)
388 i
= i2d_ECPKParameters_bio(out
, group
);
390 i
= PEM_write_bio_ECPKParameters(out
, group
);
392 BIO_printf(bio_err
, "unable to write elliptic "
393 "curve parameters\n");
394 ERR_print_errors(bio_err
);
400 EC_KEY
*eckey
= EC_KEY_new();
405 if (EC_KEY_set_group(eckey
, group
) == 0) {
406 BIO_printf(bio_err
, "unable to set group when generating key\n");
408 ERR_print_errors(bio_err
);
412 if (!EC_KEY_generate_key(eckey
)) {
413 BIO_printf(bio_err
, "unable to generate key\n");
415 ERR_print_errors(bio_err
);
419 if (outformat
== FORMAT_ASN1
)
420 i
= i2d_ECPrivateKey_bio(out
, eckey
);
422 i
= PEM_write_bio_ECPrivateKey(out
, eckey
, NULL
,
423 NULL
, 0, NULL
, NULL
);
434 BN_free(ec_cofactor
);
435 OPENSSL_free(buffer
);
436 EC_GROUP_free(group
);