1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
57 /* ====================================================================
58 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
64 * 1. Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in
69 * the documentation and/or other materials provided with the
72 * 3. All advertising materials mentioning features or use of this
73 * software must display the following acknowledgment:
74 * "This product includes software developed by the OpenSSL Project
75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78 * endorse or promote products derived from this software without
79 * prior written permission. For written permission, please contact
80 * openssl-core@openssl.org.
82 * 5. Products derived from this software may not be called "OpenSSL"
83 * nor may "OpenSSL" appear in their names without prior written
84 * permission of the OpenSSL Project.
86 * 6. Redistributions of any form whatsoever must retain the following
88 * "This product includes software developed by the OpenSSL Project
89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102 * OF THE POSSIBILITY OF SUCH DAMAGE.
103 * ====================================================================
105 * This product includes cryptographic software written by Eric Young
106 * (eay@cryptsoft.com). This product includes software written by Tim
107 * Hudson (tjh@cryptsoft.com).
111 #include <openssl/opensslconf.h>
113 NON_EMPTY_TRANSLATION_UNIT
121 # include <openssl/bio.h>
122 # include <openssl/err.h>
123 # include <openssl/bn.h>
124 # include <openssl/dh.h>
125 # include <openssl/x509.h>
126 # include <openssl/pem.h>
128 # ifndef OPENSSL_NO_DSA
129 # include <openssl/dsa.h>
132 # define DEFBITS 2048
134 static int dh_cb(int p, int n, BN_GENCB *cb);
136 typedef enum OPTION_choice {
137 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
138 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
139 OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
140 OPT_RAND, OPT_DSAPARAM, OPT_C, OPT_2, OPT_5
143 OPTIONS dhparam_options[] = {
144 {OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"},
145 {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
146 {"help", OPT_HELP, '-', "Display this summary"},
147 {"in", OPT_IN, '<', "Input file"},
148 {"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
149 {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
150 {"out", OPT_OUT, '>', "Output file"},
151 {"check", OPT_CHECK, '-', "Check the DH parameters"},
152 {"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
153 {"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
154 {"rand", OPT_RAND, 's',
155 "Load the file(s) into the random number generator"},
156 {"C", OPT_C, '-', "Print C code"},
157 {"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
158 {"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
159 # ifndef OPENSSL_NO_DSA
160 {"dsaparam", OPT_DSAPARAM, '-',
161 "Read or generate DSA parameters, convert to DH"},
163 # ifndef OPENSSL_NO_ENGINE
164 {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
169 int dhparam_main(int argc, char **argv)
171 BIO *in = NULL, *out = NULL;
173 char *infile = NULL, *outfile = NULL, *prog, *inrand = NULL;
174 #ifndef OPENSSL_NO_DSA
177 int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
178 int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
181 prog = opt_init(argc, argv, dhparam_options);
182 while ((o = opt_next()) != OPT_EOF) {
187 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
190 opt_help(dhparam_options);
194 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
198 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
208 (void)setup_engine(opt_arg(), 0);
217 #ifndef OPENSSL_NO_DSA
238 argc = opt_num_rest();
241 if (argv[0] && (!opt_int(argv[0], &num) || num <= 0))
247 # ifndef OPENSSL_NO_DSA
250 "generator may not be chosen for DSA parameters\n");
263 ERR_print_errors(bio_err);
267 BN_GENCB_set(cb, dh_cb, bio_err);
268 if (!app_RAND_load_file(NULL, 1) && inrand == NULL) {
270 "warning, not much extra random data, consider using the -rand option\n");
273 BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
274 app_RAND_load_files(inrand));
276 # ifndef OPENSSL_NO_DSA
278 DSA *dsa = DSA_new();
281 "Generating DSA parameters, %d bit long prime\n", num);
283 || !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
287 ERR_print_errors(bio_err);
291 dh = DSA_dup_DH(dsa);
295 ERR_print_errors(bio_err);
303 "Generating DH parameters, %d bit long safe prime, generator %d\n",
305 BIO_printf(bio_err, "This is going to take a long time\n");
306 if (dh == NULL || !DH_generate_parameters_ex(dh, num, g, cb)) {
308 ERR_print_errors(bio_err);
314 app_RAND_write_file(NULL);
317 in = bio_open_default(infile, 'r', informat);
321 # ifndef OPENSSL_NO_DSA
325 if (informat == FORMAT_ASN1)
326 dsa = d2i_DSAparams_bio(in, NULL);
327 else /* informat == FORMAT_PEM */
328 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
331 BIO_printf(bio_err, "unable to load DSA parameters\n");
332 ERR_print_errors(bio_err);
336 dh = DSA_dup_DH(dsa);
339 ERR_print_errors(bio_err);
345 if (informat == FORMAT_ASN1)
346 dh = d2i_DHparams_bio(in, NULL);
347 else /* informat == FORMAT_PEM */
348 dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
351 BIO_printf(bio_err, "unable to load DH parameters\n");
352 ERR_print_errors(bio_err);
360 out = bio_open_default(outfile, 'w', outformat);
365 DHparams_print(out, dh);
369 if (!DH_check(dh, &i)) {
370 ERR_print_errors(bio_err);
373 if (i & DH_CHECK_P_NOT_PRIME)
374 printf("p value is not prime\n");
375 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
376 printf("p value is not a safe prime\n");
377 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
378 printf("unable to check the generator value\n");
379 if (i & DH_NOT_SUITABLE_GENERATOR)
380 printf("the g value is not a generator\n");
382 printf("DH parameters appear to be ok.\n");
391 DH_get0_pqg(dh, &pbn, NULL, &gbn);
392 data = app_malloc(len, "print a BN");
393 BIO_printf(out, "#ifndef HEADER_DH_H\n"
394 "# include <openssl/dh.h>\n"
397 BIO_printf(out, "DH *get_dh%d()\n{\n", bits);
398 print_bignum_var(out, pbn, "dhp", bits, data);
399 print_bignum_var(out, gbn, "dhg", bits, data);
400 BIO_printf(out, " DH *dh = DH_new();\n"
401 " BIGNUM *dhp_bn, *dhg_bn;\n"
405 BIO_printf(out, " dhp_bn = BN_bin2bn(dhp_%d, sizeof (dhp_%d), NULL);\n",
407 BIO_printf(out, " dhg_bn = BN_bin2bn(dhg_%d, sizeof (dhg_%d), NULL);\n",
409 BIO_printf(out, " if (dhp_bn == NULL || dhg_bn == NULL\n"
410 " || !DH_set0_pqg(dh, dhp_bn, NULL, dhg_bn)) {\n"
412 " BN_free(dhp_bn);\n"
413 " BN_free(dhg_bn);\n"
416 if (DH_get_length(dh) > 0)
418 " if (!DH_set_length(dh, %ld)) {\n"
420 " }\n", DH_get_length(dh));
421 BIO_printf(out, " return dh;\n}\n");
427 DH_get0_pqg(dh, NULL, &q, NULL);
428 if (outformat == FORMAT_ASN1)
429 i = i2d_DHparams_bio(out, dh);
431 i = PEM_write_bio_DHxparams(out, dh);
433 i = PEM_write_bio_DHparams(out, dh);
435 BIO_printf(bio_err, "unable to write DH parameters\n");
436 ERR_print_errors(bio_err);
448 static int dh_cb(int p, int n, BN_GENCB *cb)
460 BIO_write(BN_GENCB_get_arg(cb), &c, 1);
461 (void)BIO_flush(BN_GENCB_get_arg(cb));