1 /* apps/dhparam.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
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
71 * distribution.
72 *
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/)"
77 *
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.
82 *
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.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
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 * ====================================================================
105 *
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).
109 *
110 */
111
112 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DH */
113 #ifndef OPENSSL_NO_DH
114 #include <stdio.h>
115 #include <stdlib.h>
116 #include <time.h>
117 #include <string.h>
118 #include "apps.h"
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>
125
126 #ifndef OPENSSL_NO_DSA
127 #include <openssl/dsa.h>
128 #endif
129
130 #undef PROG
131 #define PROG dhparam_main
132
133 #define DEFBITS 512
134
135 /* -inform arg - input format - default PEM (DER or PEM)
136 * -outform arg - output format - default PEM
137 * -in arg - input file - default stdin
138 * -out arg - output file - default stdout
139 * -dsaparam - read or generate DSA parameters, convert to DH
140 * -check - check the parameters are ok
141 * -noout
142 * -text
143 * -C
144 */
145
146 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb);
147
148 int MAIN(int, char **);
149
MAIN(int argc,char ** argv)150 int MAIN(int argc, char **argv)
151 {
152 DH *dh=NULL;
153 int i,badops=0,text=0;
154 #ifndef OPENSSL_NO_DSA
155 int dsaparam=0;
156 #endif
157 BIO *in=NULL,*out=NULL;
158 int informat,outformat,check=0,noout=0,C=0,ret=1;
159 char *infile,*outfile,*prog;
160 char *inrand=NULL;
161 #ifndef OPENSSL_NO_ENGINE
162 char *engine=NULL;
163 #endif
164 int num = 0, g = 0;
165
166 apps_startup();
167
168 if (bio_err == NULL)
169 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
170 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
171
172 if (!load_config(bio_err, NULL))
173 goto end;
174
175 infile=NULL;
176 outfile=NULL;
177 informat=FORMAT_PEM;
178 outformat=FORMAT_PEM;
179
180 prog=argv[0];
181 argc--;
182 argv++;
183 while (argc >= 1)
184 {
185 if (strcmp(*argv,"-inform") == 0)
186 {
187 if (--argc < 1) goto bad;
188 informat=str2fmt(*(++argv));
189 }
190 else if (strcmp(*argv,"-outform") == 0)
191 {
192 if (--argc < 1) goto bad;
193 outformat=str2fmt(*(++argv));
194 }
195 else if (strcmp(*argv,"-in") == 0)
196 {
197 if (--argc < 1) goto bad;
198 infile= *(++argv);
199 }
200 else if (strcmp(*argv,"-out") == 0)
201 {
202 if (--argc < 1) goto bad;
203 outfile= *(++argv);
204 }
205 #ifndef OPENSSL_NO_ENGINE
206 else if (strcmp(*argv,"-engine") == 0)
207 {
208 if (--argc < 1) goto bad;
209 engine= *(++argv);
210 }
211 #endif
212 else if (strcmp(*argv,"-check") == 0)
213 check=1;
214 else if (strcmp(*argv,"-text") == 0)
215 text=1;
216 #ifndef OPENSSL_NO_DSA
217 else if (strcmp(*argv,"-dsaparam") == 0)
218 dsaparam=1;
219 #endif
220 else if (strcmp(*argv,"-C") == 0)
221 C=1;
222 else if (strcmp(*argv,"-noout") == 0)
223 noout=1;
224 else if (strcmp(*argv,"-2") == 0)
225 g=2;
226 else if (strcmp(*argv,"-5") == 0)
227 g=5;
228 else if (strcmp(*argv,"-rand") == 0)
229 {
230 if (--argc < 1) goto bad;
231 inrand= *(++argv);
232 }
233 else if (((sscanf(*argv,"%d",&num) == 0) || (num <= 0)))
234 goto bad;
235 argv++;
236 argc--;
237 }
238
239 if (badops)
240 {
241 bad:
242 BIO_printf(bio_err,"%s [options] [numbits]\n",prog);
243 BIO_printf(bio_err,"where options are\n");
244 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n");
245 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n");
246 BIO_printf(bio_err," -in arg input file\n");
247 BIO_printf(bio_err," -out arg output file\n");
248 #ifndef OPENSSL_NO_DSA
249 BIO_printf(bio_err," -dsaparam read or generate DSA parameters, convert to DH\n");
250 #endif
251 BIO_printf(bio_err," -check check the DH parameters\n");
252 BIO_printf(bio_err," -text print a text form of the DH parameters\n");
253 BIO_printf(bio_err," -C Output C code\n");
254 BIO_printf(bio_err," -2 generate parameters using 2 as the generator value\n");
255 BIO_printf(bio_err," -5 generate parameters using 5 as the generator value\n");
256 BIO_printf(bio_err," numbits number of bits in to generate (default 512)\n");
257 #ifndef OPENSSL_NO_ENGINE
258 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n");
259 #endif
260 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
261 BIO_printf(bio_err," - load the file (or the files in the directory) into\n");
262 BIO_printf(bio_err," the random number generator\n");
263 BIO_printf(bio_err," -noout no output\n");
264 goto end;
265 }
266
267 ERR_load_crypto_strings();
268
269 #ifndef OPENSSL_NO_ENGINE
270 setup_engine(bio_err, engine, 0);
271 #endif
272
273 if (g && !num)
274 num = DEFBITS;
275
276 #ifndef OPENSSL_NO_DSA
277 if (dsaparam)
278 {
279 if (g)
280 {
281 BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n");
282 goto end;
283 }
284 }
285 else
286 #endif
287 {
288 /* DH parameters */
289 if (num && !g)
290 g = 2;
291 }
292
293 if(num) {
294
295 BN_GENCB cb;
296 BN_GENCB_set(&cb, dh_cb, bio_err);
297 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
298 {
299 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
300 }
301 if (inrand != NULL)
302 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
303 app_RAND_load_files(inrand));
304
305 #ifndef OPENSSL_NO_DSA
306 if (dsaparam)
307 {
308 DSA *dsa = DSA_new();
309
310 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
311 if(!dsa || !DSA_generate_parameters_ex(dsa, num,
312 NULL, 0, NULL, NULL, &cb))
313 {
314 if(dsa) DSA_free(dsa);
315 ERR_print_errors(bio_err);
316 goto end;
317 }
318
319 dh = DSA_dup_DH(dsa);
320 DSA_free(dsa);
321 if (dh == NULL)
322 {
323 ERR_print_errors(bio_err);
324 goto end;
325 }
326 }
327 else
328 #endif
329 {
330 dh = DH_new();
331 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g);
332 BIO_printf(bio_err,"This is going to take a long time\n");
333 if(!dh || !DH_generate_parameters_ex(dh, num, g, &cb))
334 {
335 ERR_print_errors(bio_err);
336 goto end;
337 }
338 }
339
340 app_RAND_write_file(NULL, bio_err);
341 } else {
342
343 in=BIO_new(BIO_s_file());
344 if (in == NULL)
345 {
346 ERR_print_errors(bio_err);
347 goto end;
348 }
349 if (infile == NULL)
350 BIO_set_fp(in,stdin,BIO_NOCLOSE);
351 else
352 {
353 if (BIO_read_filename(in,infile) <= 0)
354 {
355 perror(infile);
356 goto end;
357 }
358 }
359
360 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM)
361 {
362 BIO_printf(bio_err,"bad input format specified\n");
363 goto end;
364 }
365
366 #ifndef OPENSSL_NO_DSA
367 if (dsaparam)
368 {
369 DSA *dsa;
370
371 if (informat == FORMAT_ASN1)
372 dsa=d2i_DSAparams_bio(in,NULL);
373 else /* informat == FORMAT_PEM */
374 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
375
376 if (dsa == NULL)
377 {
378 BIO_printf(bio_err,"unable to load DSA parameters\n");
379 ERR_print_errors(bio_err);
380 goto end;
381 }
382
383 dh = DSA_dup_DH(dsa);
384 DSA_free(dsa);
385 if (dh == NULL)
386 {
387 ERR_print_errors(bio_err);
388 goto end;
389 }
390 }
391 else
392 #endif
393 {
394 if (informat == FORMAT_ASN1)
395 dh=d2i_DHparams_bio(in,NULL);
396 else /* informat == FORMAT_PEM */
397 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL);
398
399 if (dh == NULL)
400 {
401 BIO_printf(bio_err,"unable to load DH parameters\n");
402 ERR_print_errors(bio_err);
403 goto end;
404 }
405 }
406
407 /* dh != NULL */
408 }
409
410 out=BIO_new(BIO_s_file());
411 if (out == NULL)
412 {
413 ERR_print_errors(bio_err);
414 goto end;
415 }
416 if (outfile == NULL)
417 {
418 BIO_set_fp(out,stdout,BIO_NOCLOSE);
419 #ifdef OPENSSL_SYS_VMS
420 {
421 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
422 out = BIO_push(tmpbio, out);
423 }
424 #endif
425 }
426 else
427 {
428 if (BIO_write_filename(out,outfile) <= 0)
429 {
430 perror(outfile);
431 goto end;
432 }
433 }
434
435
436 if (text)
437 {
438 DHparams_print(out,dh);
439 }
440
441 if (check)
442 {
443 if (!DH_check(dh,&i))
444 {
445 ERR_print_errors(bio_err);
446 goto end;
447 }
448 if (i & DH_CHECK_P_NOT_PRIME)
449 printf("p value is not prime\n");
450 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
451 printf("p value is not a safe prime\n");
452 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
453 printf("unable to check the generator value\n");
454 if (i & DH_NOT_SUITABLE_GENERATOR)
455 printf("the g value is not a generator\n");
456 if (i == 0)
457 printf("DH parameters appear to be ok.\n");
458 }
459 if (C)
460 {
461 unsigned char *data;
462 int len,l,bits;
463
464 len=BN_num_bytes(dh->p);
465 bits=BN_num_bits(dh->p);
466 data=(unsigned char *)OPENSSL_malloc(len);
467 if (data == NULL)
468 {
469 perror("OPENSSL_malloc");
470 goto end;
471 }
472 printf("#ifndef HEADER_DH_H\n"
473 "#include <openssl/dh.h>\n"
474 "#endif\n");
475 printf("DH *get_dh%d()\n\t{\n",bits);
476
477 l=BN_bn2bin(dh->p,data);
478 printf("\tstatic unsigned char dh%d_p[]={",bits);
479 for (i=0; i<l; i++)
480 {
481 if ((i%12) == 0) printf("\n\t\t");
482 printf("0x%02X,",data[i]);
483 }
484 printf("\n\t\t};\n");
485
486 l=BN_bn2bin(dh->g,data);
487 printf("\tstatic unsigned char dh%d_g[]={",bits);
488 for (i=0; i<l; i++)
489 {
490 if ((i%12) == 0) printf("\n\t\t");
491 printf("0x%02X,",data[i]);
492 }
493 printf("\n\t\t};\n");
494
495 printf("\tDH *dh;\n\n");
496 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
497 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
498 bits,bits);
499 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
500 bits,bits);
501 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
502 printf("\t\t{ DH_free(dh); return(NULL); }\n");
503 if (dh->length)
504 printf("\tdh->length = %ld;\n", dh->length);
505 printf("\treturn(dh);\n\t}\n");
506 OPENSSL_free(data);
507 }
508
509
510 if (!noout)
511 {
512 if (outformat == FORMAT_ASN1)
513 i=i2d_DHparams_bio(out,dh);
514 else if (outformat == FORMAT_PEM)
515 i=PEM_write_bio_DHparams(out,dh);
516 else {
517 BIO_printf(bio_err,"bad output format specified for outfile\n");
518 goto end;
519 }
520 if (!i)
521 {
522 BIO_printf(bio_err,"unable to write DH parameters\n");
523 ERR_print_errors(bio_err);
524 goto end;
525 }
526 }
527 ret=0;
528 end:
529 if (in != NULL) BIO_free(in);
530 if (out != NULL) BIO_free_all(out);
531 if (dh != NULL) DH_free(dh);
532 apps_shutdown();
533 OPENSSL_EXIT(ret);
534 }
535
536 /* dh_cb is identical to dsa_cb in apps/dsaparam.c */
dh_cb(int p,int n,BN_GENCB * cb)537 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb)
538 {
539 char c='*';
540
541 if (p == 0) c='.';
542 if (p == 1) c='+';
543 if (p == 2) c='*';
544 if (p == 3) c='\n';
545 BIO_write(cb->arg,&c,1);
546 (void)BIO_flush(cb->arg);
547 #ifdef LINT
548 p=n;
549 #endif
550 return 1;
551 }
552
553 #else /* !OPENSSL_NO_DH */
554
555 # if PEDANTIC
556 static void *dummy=&dummy;
557 # endif
558
559 #endif
560