1 /* apps/dsaparam.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 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DSA */
60 /* Until the key-gen callbacks are modified to use newer prototypes, we allow
61 * deprecated functions for openssl-internal code */
62 #ifdef OPENSSL_NO_DEPRECATED
63 #undef OPENSSL_NO_DEPRECATED
64 #endif
65
66 #ifndef OPENSSL_NO_DSA
67 #include <assert.h>
68 #include <stdio.h>
69 #include <stdlib.h>
70 #include <time.h>
71 #include <string.h>
72 #include "apps.h"
73 #include <openssl/bio.h>
74 #include <openssl/err.h>
75 #include <openssl/bn.h>
76 #include <openssl/dsa.h>
77 #include <openssl/x509.h>
78 #include <openssl/pem.h>
79
80 #undef PROG
81 #define PROG dsaparam_main
82
83 /* -inform arg - input format - default PEM (DER or PEM)
84 * -outform arg - output format - default PEM
85 * -in arg - input file - default stdin
86 * -out arg - output file - default stdout
87 * -noout
88 * -text
89 * -C
90 * -noout
91 * -genkey
92 * #ifdef GENCB_TEST
93 * -timebomb n - interrupt keygen after <n> seconds
94 * #endif
95 */
96
97 #ifdef GENCB_TEST
98
99 static int stop_keygen_flag = 0;
100
timebomb_sigalarm(int foo)101 static void timebomb_sigalarm(int foo)
102 {
103 stop_keygen_flag = 1;
104 }
105
106 #endif
107
108 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb);
109
110 int MAIN(int, char **);
111
MAIN(int argc,char ** argv)112 int MAIN(int argc, char **argv)
113 {
114 #ifndef OPENSSL_NO_ENGINE
115 ENGINE *e = NULL;
116 #endif
117 DSA *dsa=NULL;
118 int i,badops=0,text=0;
119 BIO *in=NULL,*out=NULL;
120 int informat,outformat,noout=0,C=0,ret=1;
121 char *infile,*outfile,*prog,*inrand=NULL;
122 int numbits= -1,num,genkey=0;
123 int need_rand=0;
124 #ifndef OPENSSL_NO_ENGINE
125 char *engine=NULL;
126 #endif
127 #ifdef GENCB_TEST
128 int timebomb=0;
129 #endif
130
131 apps_startup();
132
133 if (bio_err == NULL)
134 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
135 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
136
137 if (!load_config(bio_err, NULL))
138 goto end;
139
140 infile=NULL;
141 outfile=NULL;
142 informat=FORMAT_PEM;
143 outformat=FORMAT_PEM;
144
145 prog=argv[0];
146 argc--;
147 argv++;
148 while (argc >= 1)
149 {
150 if (strcmp(*argv,"-inform") == 0)
151 {
152 if (--argc < 1) goto bad;
153 informat=str2fmt(*(++argv));
154 }
155 else if (strcmp(*argv,"-outform") == 0)
156 {
157 if (--argc < 1) goto bad;
158 outformat=str2fmt(*(++argv));
159 }
160 else if (strcmp(*argv,"-in") == 0)
161 {
162 if (--argc < 1) goto bad;
163 infile= *(++argv);
164 }
165 else if (strcmp(*argv,"-out") == 0)
166 {
167 if (--argc < 1) goto bad;
168 outfile= *(++argv);
169 }
170 #ifndef OPENSSL_NO_ENGINE
171 else if(strcmp(*argv, "-engine") == 0)
172 {
173 if (--argc < 1) goto bad;
174 engine = *(++argv);
175 }
176 #endif
177 #ifdef GENCB_TEST
178 else if(strcmp(*argv, "-timebomb") == 0)
179 {
180 if (--argc < 1) goto bad;
181 timebomb = atoi(*(++argv));
182 }
183 #endif
184 else if (strcmp(*argv,"-text") == 0)
185 text=1;
186 else if (strcmp(*argv,"-C") == 0)
187 C=1;
188 else if (strcmp(*argv,"-genkey") == 0)
189 {
190 genkey=1;
191 need_rand=1;
192 }
193 else if (strcmp(*argv,"-rand") == 0)
194 {
195 if (--argc < 1) goto bad;
196 inrand= *(++argv);
197 need_rand=1;
198 }
199 else if (strcmp(*argv,"-noout") == 0)
200 noout=1;
201 else if (sscanf(*argv,"%d",&num) == 1)
202 {
203 /* generate a key */
204 numbits=num;
205 need_rand=1;
206 }
207 else
208 {
209 BIO_printf(bio_err,"unknown option %s\n",*argv);
210 badops=1;
211 break;
212 }
213 argc--;
214 argv++;
215 }
216
217 if (badops)
218 {
219 bad:
220 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
221 BIO_printf(bio_err,"where options are\n");
222 BIO_printf(bio_err," -inform arg input format - DER or PEM\n");
223 BIO_printf(bio_err," -outform arg output format - DER or PEM\n");
224 BIO_printf(bio_err," -in arg input file\n");
225 BIO_printf(bio_err," -out arg output file\n");
226 BIO_printf(bio_err," -text print as text\n");
227 BIO_printf(bio_err," -C Output C code\n");
228 BIO_printf(bio_err," -noout no output\n");
229 BIO_printf(bio_err," -genkey generate a DSA key\n");
230 BIO_printf(bio_err," -rand files to use for random number input\n");
231 #ifndef OPENSSL_NO_ENGINE
232 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n");
233 #endif
234 #ifdef GENCB_TEST
235 BIO_printf(bio_err," -timebomb n interrupt keygen after <n> seconds\n");
236 #endif
237 BIO_printf(bio_err," number number of bits to use for generating private key\n");
238 goto end;
239 }
240
241 ERR_load_crypto_strings();
242
243 in=BIO_new(BIO_s_file());
244 out=BIO_new(BIO_s_file());
245 if ((in == NULL) || (out == NULL))
246 {
247 ERR_print_errors(bio_err);
248 goto end;
249 }
250
251 if (infile == NULL)
252 BIO_set_fp(in,stdin,BIO_NOCLOSE);
253 else
254 {
255 if (BIO_read_filename(in,infile) <= 0)
256 {
257 perror(infile);
258 goto end;
259 }
260 }
261 if (outfile == NULL)
262 {
263 BIO_set_fp(out,stdout,BIO_NOCLOSE);
264 #ifdef OPENSSL_SYS_VMS
265 {
266 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
267 out = BIO_push(tmpbio, out);
268 }
269 #endif
270 }
271 else
272 {
273 if (BIO_write_filename(out,outfile) <= 0)
274 {
275 perror(outfile);
276 goto end;
277 }
278 }
279
280 #ifndef OPENSSL_NO_ENGINE
281 e = setup_engine(bio_err, engine, 0);
282 #endif
283
284 if (need_rand)
285 {
286 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
287 if (inrand != NULL)
288 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
289 app_RAND_load_files(inrand));
290 }
291
292 if (numbits > 0)
293 {
294 BN_GENCB cb;
295 BN_GENCB_set(&cb, dsa_cb, bio_err);
296 assert(need_rand);
297 dsa = DSA_new();
298 if(!dsa)
299 {
300 BIO_printf(bio_err,"Error allocating DSA object\n");
301 goto end;
302 }
303 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
304 BIO_printf(bio_err,"This could take some time\n");
305 #ifdef GENCB_TEST
306 if(timebomb > 0)
307 {
308 struct sigaction act;
309 act.sa_handler = timebomb_sigalarm;
310 act.sa_flags = 0;
311 BIO_printf(bio_err,"(though I'll stop it if not done within %d secs)\n",
312 timebomb);
313 if(sigaction(SIGALRM, &act, NULL) != 0)
314 {
315 BIO_printf(bio_err,"Error, couldn't set SIGALRM handler\n");
316 goto end;
317 }
318 alarm(timebomb);
319 }
320 #endif
321 if(!DSA_generate_parameters_ex(dsa,num,NULL,0,NULL,NULL, &cb))
322 {
323 #ifdef GENCB_TEST
324 if(stop_keygen_flag)
325 {
326 BIO_printf(bio_err,"DSA key generation time-stopped\n");
327 /* This is an asked-for behaviour! */
328 ret = 0;
329 goto end;
330 }
331 #endif
332 BIO_printf(bio_err,"Error, DSA key generation failed\n");
333 goto end;
334 }
335 }
336 else if (informat == FORMAT_ASN1)
337 dsa=d2i_DSAparams_bio(in,NULL);
338 else if (informat == FORMAT_PEM)
339 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
340 else
341 {
342 BIO_printf(bio_err,"bad input format specified\n");
343 goto end;
344 }
345 if (dsa == NULL)
346 {
347 BIO_printf(bio_err,"unable to load DSA parameters\n");
348 ERR_print_errors(bio_err);
349 goto end;
350 }
351
352 if (text)
353 {
354 DSAparams_print(out,dsa);
355 }
356
357 if (C)
358 {
359 unsigned char *data;
360 int l,len,bits_p,bits_q,bits_g;
361
362 len=BN_num_bytes(dsa->p);
363 bits_p=BN_num_bits(dsa->p);
364 bits_q=BN_num_bits(dsa->q);
365 bits_g=BN_num_bits(dsa->g);
366 data=(unsigned char *)OPENSSL_malloc(len+20);
367 if (data == NULL)
368 {
369 perror("OPENSSL_malloc");
370 goto end;
371 }
372 l=BN_bn2bin(dsa->p,data);
373 printf("static unsigned char dsa%d_p[]={",bits_p);
374 for (i=0; i<l; i++)
375 {
376 if ((i%12) == 0) printf("\n\t");
377 printf("0x%02X,",data[i]);
378 }
379 printf("\n\t};\n");
380
381 l=BN_bn2bin(dsa->q,data);
382 printf("static unsigned char dsa%d_q[]={",bits_p);
383 for (i=0; i<l; i++)
384 {
385 if ((i%12) == 0) printf("\n\t");
386 printf("0x%02X,",data[i]);
387 }
388 printf("\n\t};\n");
389
390 l=BN_bn2bin(dsa->g,data);
391 printf("static unsigned char dsa%d_g[]={",bits_p);
392 for (i=0; i<l; i++)
393 {
394 if ((i%12) == 0) printf("\n\t");
395 printf("0x%02X,",data[i]);
396 }
397 printf("\n\t};\n\n");
398
399 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
400 printf("\tDSA *dsa;\n\n");
401 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
402 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
403 bits_p,bits_p);
404 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
405 bits_p,bits_p);
406 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
407 bits_p,bits_p);
408 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
409 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
410 printf("\treturn(dsa);\n\t}\n");
411 }
412
413
414 if (!noout)
415 {
416 if (outformat == FORMAT_ASN1)
417 i=i2d_DSAparams_bio(out,dsa);
418 else if (outformat == FORMAT_PEM)
419 i=PEM_write_bio_DSAparams(out,dsa);
420 else {
421 BIO_printf(bio_err,"bad output format specified for outfile\n");
422 goto end;
423 }
424 if (!i)
425 {
426 BIO_printf(bio_err,"unable to write DSA parameters\n");
427 ERR_print_errors(bio_err);
428 goto end;
429 }
430 }
431 if (genkey)
432 {
433 DSA *dsakey;
434
435 assert(need_rand);
436 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
437 if (!DSA_generate_key(dsakey)) goto end;
438 if (outformat == FORMAT_ASN1)
439 i=i2d_DSAPrivateKey_bio(out,dsakey);
440 else if (outformat == FORMAT_PEM)
441 i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
442 else {
443 BIO_printf(bio_err,"bad output format specified for outfile\n");
444 goto end;
445 }
446 DSA_free(dsakey);
447 }
448 if (need_rand)
449 app_RAND_write_file(NULL, bio_err);
450 ret=0;
451 end:
452 if (in != NULL) BIO_free(in);
453 if (out != NULL) BIO_free_all(out);
454 if (dsa != NULL) DSA_free(dsa);
455 apps_shutdown();
456 OPENSSL_EXIT(ret);
457 }
458
dsa_cb(int p,int n,BN_GENCB * cb)459 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb)
460 {
461 char c='*';
462
463 if (p == 0) c='.';
464 if (p == 1) c='+';
465 if (p == 2) c='*';
466 if (p == 3) c='\n';
467 BIO_write(cb->arg,&c,1);
468 (void)BIO_flush(cb->arg);
469 #ifdef LINT
470 p=n;
471 #endif
472 #ifdef GENCB_TEST
473 if(stop_keygen_flag)
474 return 0;
475 #endif
476 return 1;
477 }
478 #endif
479