2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
112 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DH */
113 #ifndef OPENSSL_NO_DH
119 # include <openssl/bio.h>
120 # include <openssl/err.h>
121 # include <openssl/bn.h>
122 # include <openssl/dh.h>
123 # include <openssl/x509.h>
124 # include <openssl/pem.h>
126 # ifndef OPENSSL_NO_DSA
127 # include <openssl/dsa.h>
131 # define PROG dhparam_main
133 # define DEFBITS 2048
136 * -inform arg - input format - default PEM (DER or PEM)
137 * -outform arg - output format - default PEM
138 * -in arg - input file - default stdin
139 * -out arg - output file - default stdout
140 * -dsaparam - read or generate DSA parameters, convert to DH
141 * -check - check the parameters are ok
147 static int dh_cb(int p
, int n
, BN_GENCB
*cb
);
149 int MAIN(int, char **);
151 int MAIN(int argc
, char **argv
)
154 int i
, badops
= 0, text
= 0;
155 # ifndef OPENSSL_NO_DSA
158 BIO
*in
= NULL
, *out
= NULL
;
159 int informat
, outformat
, check
= 0, noout
= 0, C
= 0, ret
= 1;
160 char *infile
, *outfile
, *prog
;
162 # ifndef OPENSSL_NO_ENGINE
170 if ((bio_err
= BIO_new(BIO_s_file())) != NULL
)
171 BIO_set_fp(bio_err
, stderr
, BIO_NOCLOSE
| BIO_FP_TEXT
);
173 if (!load_config(bio_err
, NULL
))
178 informat
= FORMAT_PEM
;
179 outformat
= FORMAT_PEM
;
185 if (strcmp(*argv
, "-inform") == 0) {
188 informat
= str2fmt(*(++argv
));
189 } else if (strcmp(*argv
, "-outform") == 0) {
192 outformat
= str2fmt(*(++argv
));
193 } else if (strcmp(*argv
, "-in") == 0) {
197 } else if (strcmp(*argv
, "-out") == 0) {
202 # ifndef OPENSSL_NO_ENGINE
203 else if (strcmp(*argv
, "-engine") == 0) {
209 else if (strcmp(*argv
, "-check") == 0)
211 else if (strcmp(*argv
, "-text") == 0)
213 # ifndef OPENSSL_NO_DSA
214 else if (strcmp(*argv
, "-dsaparam") == 0)
217 else if (strcmp(*argv
, "-C") == 0)
219 else if (strcmp(*argv
, "-noout") == 0)
221 else if (strcmp(*argv
, "-2") == 0)
223 else if (strcmp(*argv
, "-5") == 0)
225 else if (strcmp(*argv
, "-rand") == 0) {
229 } else if (((sscanf(*argv
, "%d", &num
) == 0) || (num
<= 0)))
237 BIO_printf(bio_err
, "%s [options] [numbits]\n", prog
);
238 BIO_printf(bio_err
, "where options are\n");
239 BIO_printf(bio_err
, " -inform arg input format - one of DER PEM\n");
241 " -outform arg output format - one of DER PEM\n");
242 BIO_printf(bio_err
, " -in arg input file\n");
243 BIO_printf(bio_err
, " -out arg output file\n");
244 # ifndef OPENSSL_NO_DSA
246 " -dsaparam read or generate DSA parameters, convert to DH\n");
248 BIO_printf(bio_err
, " -check check the DH parameters\n");
250 " -text print a text form of the DH parameters\n");
251 BIO_printf(bio_err
, " -C Output C code\n");
253 " -2 generate parameters using 2 as the generator value\n");
255 " -5 generate parameters using 5 as the generator value\n");
257 " numbits number of bits in to generate (default 2048)\n");
258 # ifndef OPENSSL_NO_ENGINE
260 " -engine e use engine e, possibly a hardware device.\n");
262 BIO_printf(bio_err
, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR
,
263 LIST_SEPARATOR_CHAR
);
265 " - load the file (or the files in the directory) into\n");
266 BIO_printf(bio_err
, " the random number generator\n");
267 BIO_printf(bio_err
, " -noout no output\n");
271 ERR_load_crypto_strings();
273 # ifndef OPENSSL_NO_ENGINE
274 setup_engine(bio_err
, engine
, 0);
280 # ifndef OPENSSL_NO_DSA
284 "generator may not be chosen for DSA parameters\n");
300 ERR_print_errors(bio_err
);
304 BN_GENCB_set(cb
, dh_cb
, bio_err
);
305 if (!app_RAND_load_file(NULL
, bio_err
, 1) && inrand
== NULL
) {
307 "warning, not much extra random data, consider using the -rand option\n");
310 BIO_printf(bio_err
, "%ld semi-random bytes loaded\n",
311 app_RAND_load_files(inrand
));
313 # ifndef OPENSSL_NO_DSA
315 DSA
*dsa
= DSA_new();
318 "Generating DSA parameters, %d bit long prime\n", num
);
320 || !DSA_generate_parameters_ex(dsa
, num
, NULL
, 0, NULL
, NULL
,
324 ERR_print_errors(bio_err
);
328 dh
= DSA_dup_DH(dsa
);
332 ERR_print_errors(bio_err
);
340 "Generating DH parameters, %d bit long safe prime, generator %d\n",
342 BIO_printf(bio_err
, "This is going to take a long time\n");
343 if (!dh
|| !DH_generate_parameters_ex(dh
, num
, g
, cb
)) {
345 ERR_print_errors(bio_err
);
351 app_RAND_write_file(NULL
, bio_err
);
354 in
= BIO_new(BIO_s_file());
356 ERR_print_errors(bio_err
);
360 BIO_set_fp(in
, stdin
, BIO_NOCLOSE
);
362 if (BIO_read_filename(in
, infile
) <= 0) {
368 if (informat
!= FORMAT_ASN1
&& informat
!= FORMAT_PEM
) {
369 BIO_printf(bio_err
, "bad input format specified\n");
372 # ifndef OPENSSL_NO_DSA
376 if (informat
== FORMAT_ASN1
)
377 dsa
= d2i_DSAparams_bio(in
, NULL
);
378 else /* informat == FORMAT_PEM */
379 dsa
= PEM_read_bio_DSAparams(in
, NULL
, NULL
, NULL
);
382 BIO_printf(bio_err
, "unable to load DSA parameters\n");
383 ERR_print_errors(bio_err
);
387 dh
= DSA_dup_DH(dsa
);
390 ERR_print_errors(bio_err
);
396 if (informat
== FORMAT_ASN1
)
397 dh
= d2i_DHparams_bio(in
, NULL
);
398 else /* informat == FORMAT_PEM */
399 dh
= PEM_read_bio_DHparams(in
, NULL
, NULL
, NULL
);
402 BIO_printf(bio_err
, "unable to load DH parameters\n");
403 ERR_print_errors(bio_err
);
411 out
= BIO_new(BIO_s_file());
413 ERR_print_errors(bio_err
);
416 if (outfile
== NULL
) {
417 BIO_set_fp(out
, stdout
, BIO_NOCLOSE
);
418 # ifdef OPENSSL_SYS_VMS
420 BIO
*tmpbio
= BIO_new(BIO_f_linebuffer());
421 out
= BIO_push(tmpbio
, out
);
425 if (BIO_write_filename(out
, outfile
) <= 0) {
432 DHparams_print(out
, dh
);
436 if (!DH_check(dh
, &i
)) {
437 ERR_print_errors(bio_err
);
440 if (i
& DH_CHECK_P_NOT_PRIME
)
441 printf("p value is not prime\n");
442 if (i
& DH_CHECK_P_NOT_SAFE_PRIME
)
443 printf("p value is not a safe prime\n");
444 if (i
& DH_UNABLE_TO_CHECK_GENERATOR
)
445 printf("unable to check the generator value\n");
446 if (i
& DH_NOT_SUITABLE_GENERATOR
)
447 printf("the g value is not a generator\n");
449 printf("DH parameters appear to be ok.\n");
455 len
= BN_num_bytes(dh
->p
);
456 bits
= BN_num_bits(dh
->p
);
457 data
= (unsigned char *)OPENSSL_malloc(len
);
459 perror("OPENSSL_malloc");
462 printf("#ifndef HEADER_DH_H\n"
463 "#include <openssl/dh.h>\n" "#endif\n");
464 printf("DH *get_dh%d()\n\t{\n", bits
);
466 l
= BN_bn2bin(dh
->p
, data
);
467 printf("\tstatic unsigned char dh%d_p[]={", bits
);
468 for (i
= 0; i
< l
; i
++) {
471 printf("0x%02X,", data
[i
]);
473 printf("\n\t\t};\n");
475 l
= BN_bn2bin(dh
->g
, data
);
476 printf("\tstatic unsigned char dh%d_g[]={", bits
);
477 for (i
= 0; i
< l
; i
++) {
480 printf("0x%02X,", data
[i
]);
482 printf("\n\t\t};\n");
484 printf("\tDH *dh;\n\n");
485 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
486 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
488 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
490 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
491 printf("\t\t{ DH_free(dh); return(NULL); }\n");
493 printf("\tdh->length = %ld;\n", dh
->length
);
494 printf("\treturn(dh);\n\t}\n");
499 if (outformat
== FORMAT_ASN1
)
500 i
= i2d_DHparams_bio(out
, dh
);
501 else if (outformat
== FORMAT_PEM
) {
503 i
= PEM_write_bio_DHxparams(out
, dh
);
505 i
= PEM_write_bio_DHparams(out
, dh
);
507 BIO_printf(bio_err
, "bad output format specified for outfile\n");
511 BIO_printf(bio_err
, "unable to write DH parameters\n");
512 ERR_print_errors(bio_err
);
527 /* dh_cb is identical to dsa_cb in apps/dsaparam.c */
528 static int dh_cb(int p
, int n
, BN_GENCB
*cb
)
540 BIO_write(BN_GENCB_get_arg(cb
), &c
, 1);
541 (void)BIO_flush(BN_GENCB_get_arg(cb
));
545 #else /* !OPENSSL_NO_DH */
548 static void *dummy
= &dummy
;