Check EVP_Cipher return values for SSL2
[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 #ifndef OPENSSL_NO_ENGINE
122         char *engine=NULL;
123 #endif
124 #ifdef GENCB_TEST
125         int timebomb=0;
126 #endif
127
128         apps_startup();
129
130         if (bio_err == NULL)
131                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
132                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
133
134         if (!load_config(bio_err, NULL))
135                 goto end;
136
137         infile=NULL;
138         outfile=NULL;
139         informat=FORMAT_PEM;
140         outformat=FORMAT_PEM;
141
142         prog=argv[0];
143         argc--;
144         argv++;
145         while (argc >= 1)
146                 {
147                 if      (strcmp(*argv,"-inform") == 0)
148                         {
149                         if (--argc < 1) goto bad;
150                         informat=str2fmt(*(++argv));
151                         }
152                 else if (strcmp(*argv,"-outform") == 0)
153                         {
154                         if (--argc < 1) goto bad;
155                         outformat=str2fmt(*(++argv));
156                         }
157                 else if (strcmp(*argv,"-in") == 0)
158                         {
159                         if (--argc < 1) goto bad;
160                         infile= *(++argv);
161                         }
162                 else if (strcmp(*argv,"-out") == 0)
163                         {
164                         if (--argc < 1) goto bad;
165                         outfile= *(++argv);
166                         }
167 #ifndef OPENSSL_NO_ENGINE
168                 else if(strcmp(*argv, "-engine") == 0)
169                         {
170                         if (--argc < 1) goto bad;
171                         engine = *(++argv);
172                         }
173 #endif
174 #ifdef GENCB_TEST
175                 else if(strcmp(*argv, "-timebomb") == 0)
176                         {
177                         if (--argc < 1) goto bad;
178                         timebomb = atoi(*(++argv));
179                         }
180 #endif
181                 else if (strcmp(*argv,"-text") == 0)
182                         text=1;
183                 else if (strcmp(*argv,"-C") == 0)
184                         C=1;
185                 else if (strcmp(*argv,"-genkey") == 0)
186                         {
187                         genkey=1;
188                         need_rand=1;
189                         }
190                 else if (strcmp(*argv,"-rand") == 0)
191                         {
192                         if (--argc < 1) goto bad;
193                         inrand= *(++argv);
194                         need_rand=1;
195                         }
196                 else if (strcmp(*argv,"-noout") == 0)
197                         noout=1;
198                 else if (sscanf(*argv,"%d",&num) == 1)
199                         {
200                         /* generate a key */
201                         numbits=num;
202                         need_rand=1;
203                         }
204                 else
205                         {
206                         BIO_printf(bio_err,"unknown option %s\n",*argv);
207                         badops=1;
208                         break;
209                         }
210                 argc--;
211                 argv++;
212                 }
213
214         if (badops)
215                 {
216 bad:
217                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
218                 BIO_printf(bio_err,"where options are\n");
219                 BIO_printf(bio_err," -inform arg   input format - DER or PEM\n");
220                 BIO_printf(bio_err," -outform arg  output format - DER or PEM\n");
221                 BIO_printf(bio_err," -in arg       input file\n");
222                 BIO_printf(bio_err," -out arg      output file\n");
223                 BIO_printf(bio_err," -text         print as text\n");
224                 BIO_printf(bio_err," -C            Output C code\n");
225                 BIO_printf(bio_err," -noout        no output\n");
226                 BIO_printf(bio_err," -genkey       generate a DSA key\n");
227                 BIO_printf(bio_err," -rand         files to use for random number input\n");
228 #ifndef OPENSSL_NO_ENGINE
229                 BIO_printf(bio_err," -engine e     use engine e, possibly a hardware device.\n");
230 #endif
231 #ifdef GENCB_TEST
232                 BIO_printf(bio_err," -timebomb n   interrupt keygen after <n> seconds\n");
233 #endif
234                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
235                 goto end;
236                 }
237
238         ERR_load_crypto_strings();
239
240         in=BIO_new(BIO_s_file());
241         out=BIO_new(BIO_s_file());
242         if ((in == NULL) || (out == NULL))
243                 {
244                 ERR_print_errors(bio_err);
245                 goto end;
246                 }
247
248         if (infile == NULL)
249                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
250         else
251                 {
252                 if (BIO_read_filename(in,infile) <= 0)
253                         {
254                         perror(infile);
255                         goto end;
256                         }
257                 }
258         if (outfile == NULL)
259                 {
260                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
261 #ifdef OPENSSL_SYS_VMS
262                 {
263                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
264                 out = BIO_push(tmpbio, out);
265                 }
266 #endif
267                 }
268         else
269                 {
270                 if (BIO_write_filename(out,outfile) <= 0)
271                         {
272                         perror(outfile);
273                         goto end;
274                         }
275                 }
276
277 #ifndef OPENSSL_NO_ENGINE
278         setup_engine(bio_err, engine, 0);
279 #endif
280
281         if (need_rand)
282                 {
283                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
284                 if (inrand != NULL)
285                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
286                                 app_RAND_load_files(inrand));
287                 }
288
289         if (numbits > 0)
290                 {
291                 BN_GENCB cb;
292                 BN_GENCB_set(&cb, dsa_cb, bio_err);
293                 assert(need_rand);
294                 dsa = DSA_new();
295                 if(!dsa)
296                         {
297                         BIO_printf(bio_err,"Error allocating DSA object\n");
298                         goto end;
299                         }
300                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
301                 BIO_printf(bio_err,"This could take some time\n");
302 #ifdef GENCB_TEST
303                 if(timebomb > 0)
304         {
305                 struct sigaction act;
306                 act.sa_handler = timebomb_sigalarm;
307                 act.sa_flags = 0;
308                 BIO_printf(bio_err,"(though I'll stop it if not done within %d secs)\n",
309                                 timebomb);
310                 if(sigaction(SIGALRM, &act, NULL) != 0)
311                         {
312                         BIO_printf(bio_err,"Error, couldn't set SIGALRM handler\n");
313                         goto end;
314                         }
315                 alarm(timebomb);
316         }
317 #endif
318                 if(!DSA_generate_parameters_ex(dsa,num,NULL,0,NULL,NULL, &cb))
319                         {
320 #ifdef GENCB_TEST
321                         if(stop_keygen_flag)
322                                 {
323                                 BIO_printf(bio_err,"DSA key generation time-stopped\n");
324                                 /* This is an asked-for behaviour! */
325                                 ret = 0;
326                                 goto end;
327                                 }
328 #endif
329                         ERR_print_errors(bio_err);
330                         BIO_printf(bio_err,"Error, DSA key generation failed\n");
331                         goto end;
332                         }
333                 }
334         else if (informat == FORMAT_ASN1)
335                 dsa=d2i_DSAparams_bio(in,NULL);
336         else if (informat == FORMAT_PEM)
337                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
338         else
339                 {
340                 BIO_printf(bio_err,"bad input format specified\n");
341                 goto end;
342                 }
343         if (dsa == NULL)
344                 {
345                 BIO_printf(bio_err,"unable to load DSA parameters\n");
346                 ERR_print_errors(bio_err);
347                 goto end;
348                 }
349
350         if (text)
351                 {
352                 DSAparams_print(out,dsa);
353                 }
354         
355         if (C)
356                 {
357                 unsigned char *data;
358                 int l,len,bits_p;
359
360                 len=BN_num_bytes(dsa->p);
361                 bits_p=BN_num_bits(dsa->p);
362                 data=(unsigned char *)OPENSSL_malloc(len+20);
363                 if (data == NULL)
364                         {
365                         perror("OPENSSL_malloc");
366                         goto end;
367                         }
368                 l=BN_bn2bin(dsa->p,data);
369                 printf("static unsigned char dsa%d_p[]={",bits_p);
370                 for (i=0; i<l; i++)
371                         {
372                         if ((i%12) == 0) printf("\n\t");
373                         printf("0x%02X,",data[i]);
374                         }
375                 printf("\n\t};\n");
376
377                 l=BN_bn2bin(dsa->q,data);
378                 printf("static unsigned char dsa%d_q[]={",bits_p);
379                 for (i=0; i<l; i++)
380                         {
381                         if ((i%12) == 0) printf("\n\t");
382                         printf("0x%02X,",data[i]);
383                         }
384                 printf("\n\t};\n");
385
386                 l=BN_bn2bin(dsa->g,data);
387                 printf("static unsigned char dsa%d_g[]={",bits_p);
388                 for (i=0; i<l; i++)
389                         {
390                         if ((i%12) == 0) printf("\n\t");
391                         printf("0x%02X,",data[i]);
392                         }
393                 printf("\n\t};\n\n");
394
395                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
396                 printf("\tDSA *dsa;\n\n");
397                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
398                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
399                         bits_p,bits_p);
400                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
401                         bits_p,bits_p);
402                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
403                         bits_p,bits_p);
404                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
405                 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
406                 printf("\treturn(dsa);\n\t}\n");
407                 }
408
409
410         if (!noout)
411                 {
412                 if      (outformat == FORMAT_ASN1)
413                         i=i2d_DSAparams_bio(out,dsa);
414                 else if (outformat == FORMAT_PEM)
415                         i=PEM_write_bio_DSAparams(out,dsa);
416                 else    {
417                         BIO_printf(bio_err,"bad output format specified for outfile\n");
418                         goto end;
419                         }
420                 if (!i)
421                         {
422                         BIO_printf(bio_err,"unable to write DSA parameters\n");
423                         ERR_print_errors(bio_err);
424                         goto end;
425                         }
426                 }
427         if (genkey)
428                 {
429                 DSA *dsakey;
430
431                 assert(need_rand);
432                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
433                 if (!DSA_generate_key(dsakey))
434                         {
435                         ERR_print_errors(bio_err);
436                         DSA_free(dsakey);
437                         goto end;
438                         }
439                 if      (outformat == FORMAT_ASN1)
440                         i=i2d_DSAPrivateKey_bio(out,dsakey);
441                 else if (outformat == FORMAT_PEM)
442                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
443                 else    {
444                         BIO_printf(bio_err,"bad output format specified for outfile\n");
445                         DSA_free(dsakey);
446                         goto end;
447                         }
448                 DSA_free(dsakey);
449                 }
450         if (need_rand)
451                 app_RAND_write_file(NULL, bio_err);
452         ret=0;
453 end:
454         if (in != NULL) BIO_free(in);
455         if (out != NULL) BIO_free_all(out);
456         if (dsa != NULL) DSA_free(dsa);
457         apps_shutdown();
458         OPENSSL_EXIT(ret);
459         }
460
461 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb)
462         {
463         char c='*';
464
465         if (p == 0) c='.';
466         if (p == 1) c='+';
467         if (p == 2) c='*';
468         if (p == 3) c='\n';
469         BIO_write(cb->arg,&c,1);
470         (void)BIO_flush(cb->arg);
471 #ifdef LINT
472         p=n;
473 #endif
474 #ifdef GENCB_TEST
475         if(stop_keygen_flag)
476                 return 0;
477 #endif
478         return 1;
479         }
480 #else /* !OPENSSL_NO_DSA */
481
482 # if PEDANTIC
483 static void *dummy=&dummy;
484 # endif
485
486 #endif