Make tls1_check_chain return a set of flags indicating checks passed
[openssl.git] / apps / dhparam.c
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
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                                 if(dh) DH_free(dh);
336                                 ERR_print_errors(bio_err);
337                                 goto end;
338                                 }
339                         }
340
341                 app_RAND_write_file(NULL, bio_err);
342         } else {
343
344                 in=BIO_new(BIO_s_file());
345                 if (in == NULL)
346                         {
347                         ERR_print_errors(bio_err);
348                         goto end;
349                         }
350                 if (infile == NULL)
351                         BIO_set_fp(in,stdin,BIO_NOCLOSE);
352                 else
353                         {
354                         if (BIO_read_filename(in,infile) <= 0)
355                                 {
356                                 perror(infile);
357                                 goto end;
358                                 }
359                         }
360
361                 if      (informat != FORMAT_ASN1 && informat != FORMAT_PEM)
362                         {
363                         BIO_printf(bio_err,"bad input format specified\n");
364                         goto end;
365                         }
366
367 #ifndef OPENSSL_NO_DSA
368                 if (dsaparam)
369                         {
370                         DSA *dsa;
371                         
372                         if (informat == FORMAT_ASN1)
373                                 dsa=d2i_DSAparams_bio(in,NULL);
374                         else /* informat == FORMAT_PEM */
375                                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
376                         
377                         if (dsa == NULL)
378                                 {
379                                 BIO_printf(bio_err,"unable to load DSA parameters\n");
380                                 ERR_print_errors(bio_err);
381                                 goto end;
382                                 }
383                         
384                         dh = DSA_dup_DH(dsa);
385                         DSA_free(dsa);
386                         if (dh == NULL)
387                                 {
388                                 ERR_print_errors(bio_err);
389                                 goto end;
390                                 }
391                         }
392                 else
393 #endif
394                         {
395                         if (informat == FORMAT_ASN1)
396                                 dh=d2i_DHparams_bio(in,NULL);
397                         else /* informat == FORMAT_PEM */
398                                 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL);
399                         
400                         if (dh == NULL)
401                                 {
402                                 BIO_printf(bio_err,"unable to load DH parameters\n");
403                                 ERR_print_errors(bio_err);
404                                 goto end;
405                                 }
406                         }
407                 
408                 /* dh != NULL */
409         }
410         
411         out=BIO_new(BIO_s_file());
412         if (out == NULL)
413                 {
414                 ERR_print_errors(bio_err);
415                 goto end;
416                 }
417         if (outfile == NULL)
418                 {
419                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
420 #ifdef OPENSSL_SYS_VMS
421                 {
422                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
423                 out = BIO_push(tmpbio, out);
424                 }
425 #endif
426                 }
427         else
428                 {
429                 if (BIO_write_filename(out,outfile) <= 0)
430                         {
431                         perror(outfile);
432                         goto end;
433                         }
434                 }
435
436
437         if (text)
438                 {
439                 DHparams_print(out,dh);
440                 }
441         
442         if (check)
443                 {
444                 if (!DH_check(dh,&i))
445                         {
446                         ERR_print_errors(bio_err);
447                         goto end;
448                         }
449                 if (i & DH_CHECK_P_NOT_PRIME)
450                         printf("p value is not prime\n");
451                 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
452                         printf("p value is not a safe prime\n");
453                 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
454                         printf("unable to check the generator value\n");
455                 if (i & DH_NOT_SUITABLE_GENERATOR)
456                         printf("the g value is not a generator\n");
457                 if (i == 0)
458                         printf("DH parameters appear to be ok.\n");
459                 }
460         if (C)
461                 {
462                 unsigned char *data;
463                 int len,l,bits;
464
465                 len=BN_num_bytes(dh->p);
466                 bits=BN_num_bits(dh->p);
467                 data=(unsigned char *)OPENSSL_malloc(len);
468                 if (data == NULL)
469                         {
470                         perror("OPENSSL_malloc");
471                         goto end;
472                         }
473                 printf("#ifndef HEADER_DH_H\n"
474                        "#include <openssl/dh.h>\n"
475                        "#endif\n");
476                 printf("DH *get_dh%d()\n\t{\n",bits);
477
478                 l=BN_bn2bin(dh->p,data);
479                 printf("\tstatic unsigned char dh%d_p[]={",bits);
480                 for (i=0; i<l; i++)
481                         {
482                         if ((i%12) == 0) printf("\n\t\t");
483                         printf("0x%02X,",data[i]);
484                         }
485                 printf("\n\t\t};\n");
486
487                 l=BN_bn2bin(dh->g,data);
488                 printf("\tstatic unsigned char dh%d_g[]={",bits);
489                 for (i=0; i<l; i++)
490                         {
491                         if ((i%12) == 0) printf("\n\t\t");
492                         printf("0x%02X,",data[i]);
493                         }
494                 printf("\n\t\t};\n");
495
496                 printf("\tDH *dh;\n\n");
497                 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
498                 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
499                         bits,bits);
500                 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
501                         bits,bits);
502                 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
503                 printf("\t\t{ DH_free(dh); return(NULL); }\n");
504                 if (dh->length)
505                         printf("\tdh->length = %ld;\n", dh->length);
506                 printf("\treturn(dh);\n\t}\n");
507                 OPENSSL_free(data);
508                 }
509
510
511         if (!noout)
512                 {
513                 if      (outformat == FORMAT_ASN1)
514                         i=i2d_DHparams_bio(out,dh);
515                 else if (outformat == FORMAT_PEM)
516                         {
517                         if (dh->q)
518                                 i=PEM_write_bio_DHxparams(out,dh);
519                         else
520                                 i=PEM_write_bio_DHparams(out,dh);
521                         }
522                 else    {
523                         BIO_printf(bio_err,"bad output format specified for outfile\n");
524                         goto end;
525                         }
526                 if (!i)
527                         {
528                         BIO_printf(bio_err,"unable to write DH parameters\n");
529                         ERR_print_errors(bio_err);
530                         goto end;
531                         }
532                 }
533         ret=0;
534 end:
535         if (in != NULL) BIO_free(in);
536         if (out != NULL) BIO_free_all(out);
537         if (dh != NULL) DH_free(dh);
538         apps_shutdown();
539         OPENSSL_EXIT(ret);
540         }
541
542 /* dh_cb is identical to dsa_cb in apps/dsaparam.c */
543 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb)
544         {
545         char c='*';
546
547         if (p == 0) c='.';
548         if (p == 1) c='+';
549         if (p == 2) c='*';
550         if (p == 3) c='\n';
551         BIO_write(cb->arg,&c,1);
552         (void)BIO_flush(cb->arg);
553 #ifdef LINT
554         p=n;
555 #endif
556         return 1;
557         }
558
559 #else /* !OPENSSL_NO_DH */
560
561 # if PEDANTIC
562 static void *dummy=&dummy;
563 # endif
564
565 #endif