Workaround for some CMS signature formats.
[openssl.git] / apps / dsaparam.c
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
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
112 int MAIN(int argc, char **argv)
113         {
114         DSA *dsa=NULL;
115         int i,badops=0,text=0;
116         BIO *in=NULL,*out=NULL;
117         int informat,outformat,noout=0,C=0,ret=1;
118         char *infile,*outfile,*prog,*inrand=NULL;
119         int numbits= -1,num,genkey=0;
120         int need_rand=0;
121         int non_fips_allow = 0;
122 #ifndef OPENSSL_NO_ENGINE
123         char *engine=NULL;
124 #endif
125 #ifdef GENCB_TEST
126         int timebomb=0;
127 #endif
128
129         apps_startup();
130
131         if (bio_err == NULL)
132                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
133                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
134
135         if (!load_config(bio_err, NULL))
136                 goto end;
137
138         infile=NULL;
139         outfile=NULL;
140         informat=FORMAT_PEM;
141         outformat=FORMAT_PEM;
142
143         prog=argv[0];
144         argc--;
145         argv++;
146         while (argc >= 1)
147                 {
148                 if      (strcmp(*argv,"-inform") == 0)
149                         {
150                         if (--argc < 1) goto bad;
151                         informat=str2fmt(*(++argv));
152                         }
153                 else if (strcmp(*argv,"-outform") == 0)
154                         {
155                         if (--argc < 1) goto bad;
156                         outformat=str2fmt(*(++argv));
157                         }
158                 else if (strcmp(*argv,"-in") == 0)
159                         {
160                         if (--argc < 1) goto bad;
161                         infile= *(++argv);
162                         }
163                 else if (strcmp(*argv,"-out") == 0)
164                         {
165                         if (--argc < 1) goto bad;
166                         outfile= *(++argv);
167                         }
168 #ifndef OPENSSL_NO_ENGINE
169                 else if(strcmp(*argv, "-engine") == 0)
170                         {
171                         if (--argc < 1) goto bad;
172                         engine = *(++argv);
173                         }
174 #endif
175 #ifdef GENCB_TEST
176                 else if(strcmp(*argv, "-timebomb") == 0)
177                         {
178                         if (--argc < 1) goto bad;
179                         timebomb = atoi(*(++argv));
180                         }
181 #endif
182                 else if (strcmp(*argv,"-text") == 0)
183                         text=1;
184                 else if (strcmp(*argv,"-C") == 0)
185                         C=1;
186                 else if (strcmp(*argv,"-genkey") == 0)
187                         {
188                         genkey=1;
189                         need_rand=1;
190                         }
191                 else if (strcmp(*argv,"-rand") == 0)
192                         {
193                         if (--argc < 1) goto bad;
194                         inrand= *(++argv);
195                         need_rand=1;
196                         }
197                 else if (strcmp(*argv,"-noout") == 0)
198                         noout=1;
199                 else if (strcmp(*argv,"-non-fips-allow") == 0)
200                         non_fips_allow = 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         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                 if (non_fips_allow)
304                         dsa->flags |= DSA_FLAG_NON_FIPS_ALLOW;
305                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
306                 BIO_printf(bio_err,"This could take some time\n");
307 #ifdef GENCB_TEST
308                 if(timebomb > 0)
309         {
310                 struct sigaction act;
311                 act.sa_handler = timebomb_sigalarm;
312                 act.sa_flags = 0;
313                 BIO_printf(bio_err,"(though I'll stop it if not done within %d secs)\n",
314                                 timebomb);
315                 if(sigaction(SIGALRM, &act, NULL) != 0)
316                         {
317                         BIO_printf(bio_err,"Error, couldn't set SIGALRM handler\n");
318                         goto end;
319                         }
320                 alarm(timebomb);
321         }
322 #endif
323                 if(!DSA_generate_parameters_ex(dsa,num,NULL,0,NULL,NULL, &cb))
324                         {
325 #ifdef GENCB_TEST
326                         if(stop_keygen_flag)
327                                 {
328                                 BIO_printf(bio_err,"DSA key generation time-stopped\n");
329                                 /* This is an asked-for behaviour! */
330                                 ret = 0;
331                                 goto end;
332                                 }
333 #endif
334                         ERR_print_errors(bio_err);
335                         BIO_printf(bio_err,"Error, DSA key generation failed\n");
336                         goto end;
337                         }
338                 }
339         else if (informat == FORMAT_ASN1)
340                 dsa=d2i_DSAparams_bio(in,NULL);
341         else if (informat == FORMAT_PEM)
342                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
343         else
344                 {
345                 BIO_printf(bio_err,"bad input format specified\n");
346                 goto end;
347                 }
348         if (dsa == NULL)
349                 {
350                 BIO_printf(bio_err,"unable to load DSA parameters\n");
351                 ERR_print_errors(bio_err);
352                 goto end;
353                 }
354
355         if (text)
356                 {
357                 DSAparams_print(out,dsa);
358                 }
359         
360         if (C)
361                 {
362                 unsigned char *data;
363                 int l,len,bits_p;
364
365                 len=BN_num_bytes(dsa->p);
366                 bits_p=BN_num_bits(dsa->p);
367                 data=(unsigned char *)OPENSSL_malloc(len+20);
368                 if (data == NULL)
369                         {
370                         perror("OPENSSL_malloc");
371                         goto end;
372                         }
373                 l=BN_bn2bin(dsa->p,data);
374                 printf("static unsigned char dsa%d_p[]={",bits_p);
375                 for (i=0; i<l; i++)
376                         {
377                         if ((i%12) == 0) printf("\n\t");
378                         printf("0x%02X,",data[i]);
379                         }
380                 printf("\n\t};\n");
381
382                 l=BN_bn2bin(dsa->q,data);
383                 printf("static unsigned char dsa%d_q[]={",bits_p);
384                 for (i=0; i<l; i++)
385                         {
386                         if ((i%12) == 0) printf("\n\t");
387                         printf("0x%02X,",data[i]);
388                         }
389                 printf("\n\t};\n");
390
391                 l=BN_bn2bin(dsa->g,data);
392                 printf("static unsigned char dsa%d_g[]={",bits_p);
393                 for (i=0; i<l; i++)
394                         {
395                         if ((i%12) == 0) printf("\n\t");
396                         printf("0x%02X,",data[i]);
397                         }
398                 printf("\n\t};\n\n");
399
400                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
401                 printf("\tDSA *dsa;\n\n");
402                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
403                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
404                         bits_p,bits_p);
405                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
406                         bits_p,bits_p);
407                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
408                         bits_p,bits_p);
409                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
410                 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
411                 printf("\treturn(dsa);\n\t}\n");
412                 }
413
414
415         if (!noout)
416                 {
417                 if      (outformat == FORMAT_ASN1)
418                         i=i2d_DSAparams_bio(out,dsa);
419                 else if (outformat == FORMAT_PEM)
420                         i=PEM_write_bio_DSAparams(out,dsa);
421                 else    {
422                         BIO_printf(bio_err,"bad output format specified for outfile\n");
423                         goto end;
424                         }
425                 if (!i)
426                         {
427                         BIO_printf(bio_err,"unable to write DSA parameters\n");
428                         ERR_print_errors(bio_err);
429                         goto end;
430                         }
431                 }
432         if (genkey)
433                 {
434                 DSA *dsakey;
435
436                 assert(need_rand);
437                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
438                 if (non_fips_allow)
439                         dsakey->flags |= DSA_FLAG_NON_FIPS_ALLOW;
440                 if (!DSA_generate_key(dsakey))
441                         {
442                         ERR_print_errors(bio_err);
443                         DSA_free(dsakey);
444                         goto end;
445                         }
446                 if      (outformat == FORMAT_ASN1)
447                         i=i2d_DSAPrivateKey_bio(out,dsakey);
448                 else if (outformat == FORMAT_PEM)
449                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
450                 else    {
451                         BIO_printf(bio_err,"bad output format specified for outfile\n");
452                         DSA_free(dsakey);
453                         goto end;
454                         }
455                 DSA_free(dsakey);
456                 }
457         if (need_rand)
458                 app_RAND_write_file(NULL, bio_err);
459         ret=0;
460 end:
461         if (in != NULL) BIO_free(in);
462         if (out != NULL) BIO_free_all(out);
463         if (dsa != NULL) DSA_free(dsa);
464         apps_shutdown();
465         OPENSSL_EXIT(ret);
466         }
467
468 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb)
469         {
470         char c='*';
471
472         if (p == 0) c='.';
473         if (p == 1) c='+';
474         if (p == 2) c='*';
475         if (p == 3) c='\n';
476         BIO_write(cb->arg,&c,1);
477         (void)BIO_flush(cb->arg);
478 #ifdef LINT
479         p=n;
480 #endif
481 #ifdef GENCB_TEST
482         if(stop_keygen_flag)
483                 return 0;
484 #endif
485         return 1;
486         }
487 #else /* !OPENSSL_NO_DSA */
488
489 # if PEDANTIC
490 static void *dummy=&dummy;
491 # endif
492
493 #endif