RFC 3161 compliant time stamp request creation, response generation
[openssl.git] / apps / dh.c
1 /* apps/dh.c */
2 /* obsoleted by dhparam.c */
3 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4  * All rights reserved.
5  *
6  * This package is an SSL implementation written
7  * by Eric Young (eay@cryptsoft.com).
8  * The implementation was written so as to conform with Netscapes SSL.
9  * 
10  * This library is free for commercial and non-commercial use as long as
11  * the following conditions are aheared to.  The following conditions
12  * apply to all code found in this distribution, be it the RC4, RSA,
13  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
14  * included with this distribution is covered by the same copyright terms
15  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16  * 
17  * Copyright remains Eric Young's, and as such any Copyright notices in
18  * the code are not to be removed.
19  * If this package is used in a product, Eric Young should be given attribution
20  * as the author of the parts of the library used.
21  * This can be in the form of a textual message at program startup or
22  * in documentation (online or textual) provided with the package.
23  * 
24  * Redistribution and use in source and binary forms, with or without
25  * modification, are permitted provided that the following conditions
26  * are met:
27  * 1. Redistributions of source code must retain the copyright
28  *    notice, this list of conditions and the following disclaimer.
29  * 2. Redistributions in binary form must reproduce the above copyright
30  *    notice, this list of conditions and the following disclaimer in the
31  *    documentation and/or other materials provided with the distribution.
32  * 3. All advertising materials mentioning features or use of this software
33  *    must display the following acknowledgement:
34  *    "This product includes cryptographic software written by
35  *     Eric Young (eay@cryptsoft.com)"
36  *    The word 'cryptographic' can be left out if the rouines from the library
37  *    being used are not cryptographic related :-).
38  * 4. If you include any Windows specific code (or a derivative thereof) from 
39  *    the apps directory (application code) you must include an acknowledgement:
40  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41  * 
42  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52  * SUCH DAMAGE.
53  * 
54  * The licence and distribution terms for any publically available version or
55  * derivative of this code cannot be changed.  i.e. this code cannot simply be
56  * copied and put under another distribution licence
57  * [including the GNU Public Licence.]
58  */
59
60 #include <openssl/opensslconf.h>        /* for OPENSSL_NO_DH */
61 #ifndef OPENSSL_NO_DH
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <time.h>
65 #include <string.h>
66 #include "apps.h"
67 #include <openssl/bio.h>
68 #include <openssl/err.h>
69 #include <openssl/bn.h>
70 #include <openssl/dh.h>
71 #include <openssl/x509.h>
72 #include <openssl/pem.h>
73
74 #undef PROG
75 #define PROG    dh_main
76
77 /* -inform arg  - input format - default PEM (DER or PEM)
78  * -outform arg - output format - default PEM
79  * -in arg      - input file - default stdin
80  * -out arg     - output file - default stdout
81  * -check       - check the parameters are ok
82  * -noout
83  * -text
84  * -C
85  */
86
87 int MAIN(int, char **);
88
89 int MAIN(int argc, char **argv)
90         {
91 #ifndef OPENSSL_NO_ENGINE
92         ENGINE *e = NULL;
93 #endif
94         DH *dh=NULL;
95         int i,badops=0,text=0;
96         BIO *in=NULL,*out=NULL;
97         int informat,outformat,check=0,noout=0,C=0,ret=1;
98         char *infile,*outfile,*prog;
99 #ifndef OPENSSL_NO_ENGINE
100         char *engine;
101 #endif
102
103         apps_startup();
104
105         if (bio_err == NULL)
106                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
107                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
108
109         if (!load_config(bio_err, NULL))
110                 goto end;
111
112 #ifndef OPENSSL_NO_ENGINE
113         engine=NULL;
114 #endif
115         infile=NULL;
116         outfile=NULL;
117         informat=FORMAT_PEM;
118         outformat=FORMAT_PEM;
119
120         prog=argv[0];
121         argc--;
122         argv++;
123         while (argc >= 1)
124                 {
125                 if      (strcmp(*argv,"-inform") == 0)
126                         {
127                         if (--argc < 1) goto bad;
128                         informat=str2fmt(*(++argv));
129                         }
130                 else if (strcmp(*argv,"-outform") == 0)
131                         {
132                         if (--argc < 1) goto bad;
133                         outformat=str2fmt(*(++argv));
134                         }
135                 else if (strcmp(*argv,"-in") == 0)
136                         {
137                         if (--argc < 1) goto bad;
138                         infile= *(++argv);
139                         }
140                 else if (strcmp(*argv,"-out") == 0)
141                         {
142                         if (--argc < 1) goto bad;
143                         outfile= *(++argv);
144                         }
145 #ifndef OPENSSL_NO_ENGINE
146                 else if (strcmp(*argv,"-engine") == 0)
147                         {
148                         if (--argc < 1) goto bad;
149                         engine= *(++argv);
150                         }
151 #endif
152                 else if (strcmp(*argv,"-check") == 0)
153                         check=1;
154                 else if (strcmp(*argv,"-text") == 0)
155                         text=1;
156                 else if (strcmp(*argv,"-C") == 0)
157                         C=1;
158                 else if (strcmp(*argv,"-noout") == 0)
159                         noout=1;
160                 else
161                         {
162                         BIO_printf(bio_err,"unknown option %s\n",*argv);
163                         badops=1;
164                         break;
165                         }
166                 argc--;
167                 argv++;
168                 }
169
170         if (badops)
171                 {
172 bad:
173                 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
174                 BIO_printf(bio_err,"where options are\n");
175                 BIO_printf(bio_err," -inform arg   input format - one of DER PEM\n");
176                 BIO_printf(bio_err," -outform arg  output format - one of DER PEM\n");
177                 BIO_printf(bio_err," -in arg       input file\n");
178                 BIO_printf(bio_err," -out arg      output file\n");
179                 BIO_printf(bio_err," -check        check the DH parameters\n");
180                 BIO_printf(bio_err," -text         print a text form of the DH parameters\n");
181                 BIO_printf(bio_err," -C            Output C code\n");
182                 BIO_printf(bio_err," -noout        no output\n");
183 #ifndef OPENSSL_NO_ENGINE
184                 BIO_printf(bio_err," -engine e     use engine e, possibly a hardware device.\n");
185 #endif
186                 goto end;
187                 }
188
189         ERR_load_crypto_strings();
190
191 #ifndef OPENSSL_NO_ENGINE
192         e = setup_engine(bio_err, engine, 0);
193 #endif
194
195         in=BIO_new(BIO_s_file());
196         out=BIO_new(BIO_s_file());
197         if ((in == NULL) || (out == NULL))
198                 {
199                 ERR_print_errors(bio_err);
200                 goto end;
201                 }
202
203         if (infile == NULL)
204                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
205         else
206                 {
207                 if (BIO_read_filename(in,infile) <= 0)
208                         {
209                         perror(infile);
210                         goto end;
211                         }
212                 }
213         if (outfile == NULL)
214                 {
215                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
216 #ifdef OPENSSL_SYS_VMS
217                 {
218                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
219                 out = BIO_push(tmpbio, out);
220                 }
221 #endif
222                 }
223         else
224                 {
225                 if (BIO_write_filename(out,outfile) <= 0)
226                         {
227                         perror(outfile);
228                         goto end;
229                         }
230                 }
231
232         if      (informat == FORMAT_ASN1)
233                 dh=d2i_DHparams_bio(in,NULL);
234         else if (informat == FORMAT_PEM)
235                 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL);
236         else
237                 {
238                 BIO_printf(bio_err,"bad input format specified\n");
239                 goto end;
240                 }
241         if (dh == NULL)
242                 {
243                 BIO_printf(bio_err,"unable to load DH parameters\n");
244                 ERR_print_errors(bio_err);
245                 goto end;
246                 }
247
248         
249
250         if (text)
251                 {
252                 DHparams_print(out,dh);
253 #ifdef undef
254                 printf("p=");
255                 BN_print(stdout,dh->p);
256                 printf("\ng=");
257                 BN_print(stdout,dh->g);
258                 printf("\n");
259                 if (dh->length != 0)
260                         printf("recommended private length=%ld\n",dh->length);
261 #endif
262                 }
263         
264         if (check)
265                 {
266                 if (!DH_check(dh,&i))
267                         {
268                         ERR_print_errors(bio_err);
269                         goto end;
270                         }
271                 if (i & DH_CHECK_P_NOT_PRIME)
272                         printf("p value is not prime\n");
273                 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
274                         printf("p value is not a safe prime\n");
275                 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
276                         printf("unable to check the generator value\n");
277                 if (i & DH_NOT_SUITABLE_GENERATOR)
278                         printf("the g value is not a generator\n");
279                 if (i == 0)
280                         printf("DH parameters appear to be ok.\n");
281                 }
282         if (C)
283                 {
284                 unsigned char *data;
285                 int len,l,bits;
286
287                 len=BN_num_bytes(dh->p);
288                 bits=BN_num_bits(dh->p);
289                 data=(unsigned char *)OPENSSL_malloc(len);
290                 if (data == NULL)
291                         {
292                         perror("OPENSSL_malloc");
293                         goto end;
294                         }
295                 l=BN_bn2bin(dh->p,data);
296                 printf("static unsigned char dh%d_p[]={",bits);
297                 for (i=0; i<l; i++)
298                         {
299                         if ((i%12) == 0) printf("\n\t");
300                         printf("0x%02X,",data[i]);
301                         }
302                 printf("\n\t};\n");
303
304                 l=BN_bn2bin(dh->g,data);
305                 printf("static unsigned char dh%d_g[]={",bits);
306                 for (i=0; i<l; i++)
307                         {
308                         if ((i%12) == 0) printf("\n\t");
309                         printf("0x%02X,",data[i]);
310                         }
311                 printf("\n\t};\n\n");
312
313                 printf("DH *get_dh%d()\n\t{\n",bits);
314                 printf("\tDH *dh;\n\n");
315                 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
316                 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
317                         bits,bits);
318                 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
319                         bits,bits);
320                 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
321                 printf("\t\treturn(NULL);\n");
322                 printf("\treturn(dh);\n\t}\n");
323                 OPENSSL_free(data);
324                 }
325
326
327         if (!noout)
328                 {
329                 if      (outformat == FORMAT_ASN1)
330                         i=i2d_DHparams_bio(out,dh);
331                 else if (outformat == FORMAT_PEM)
332                         i=PEM_write_bio_DHparams(out,dh);
333                 else    {
334                         BIO_printf(bio_err,"bad output format specified for outfile\n");
335                         goto end;
336                         }
337                 if (!i)
338                         {
339                         BIO_printf(bio_err,"unable to write DH parameters\n");
340                         ERR_print_errors(bio_err);
341                         goto end;
342                         }
343                 }
344         ret=0;
345 end:
346         if (in != NULL) BIO_free(in);
347         if (out != NULL) BIO_free_all(out);
348         if (dh != NULL) DH_free(dh);
349         apps_shutdown();
350         OPENSSL_EXIT(ret);
351         }
352 #endif