always include <string.h> (we do this in various other header files,
[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 #ifndef OPENSSL_NO_DSA
60 #include <assert.h>
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <time.h>
64 #include <string.h>
65 #include "apps.h"
66 #include <openssl/bio.h>
67 #include <openssl/err.h>
68 #include <openssl/bn.h>
69 #include <openssl/dsa.h>
70 #include <openssl/x509.h>
71 #include <openssl/pem.h>
72
73 #undef PROG
74 #define PROG    dsaparam_main
75
76 /* -inform arg  - input format - default PEM (DER or PEM)
77  * -outform arg - output format - default PEM
78  * -in arg      - input file - default stdin
79  * -out arg     - output file - default stdout
80  * -noout
81  * -text
82  * -C
83  * -noout
84  * -genkey
85  */
86
87 static void MS_CALLBACK dsa_cb(int p, int n, void *arg);
88
89 int MAIN(int, char **);
90
91 int MAIN(int argc, char **argv)
92         {
93         ENGINE *e = NULL;
94         DSA *dsa=NULL;
95         int i,badops=0,text=0;
96         BIO *in=NULL,*out=NULL;
97         int informat,outformat,noout=0,C=0,ret=1;
98         char *infile,*outfile,*prog,*inrand=NULL;
99         int numbits= -1,num,genkey=0;
100         int need_rand=0;
101         char *engine=NULL;
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         infile=NULL;
113         outfile=NULL;
114         informat=FORMAT_PEM;
115         outformat=FORMAT_PEM;
116
117         prog=argv[0];
118         argc--;
119         argv++;
120         while (argc >= 1)
121                 {
122                 if      (strcmp(*argv,"-inform") == 0)
123                         {
124                         if (--argc < 1) goto bad;
125                         informat=str2fmt(*(++argv));
126                         }
127                 else if (strcmp(*argv,"-outform") == 0)
128                         {
129                         if (--argc < 1) goto bad;
130                         outformat=str2fmt(*(++argv));
131                         }
132                 else if (strcmp(*argv,"-in") == 0)
133                         {
134                         if (--argc < 1) goto bad;
135                         infile= *(++argv);
136                         }
137                 else if (strcmp(*argv,"-out") == 0)
138                         {
139                         if (--argc < 1) goto bad;
140                         outfile= *(++argv);
141                         }
142                 else if(strcmp(*argv, "-engine") == 0)
143                         {
144                         if (--argc < 1) goto bad;
145                         engine = *(++argv);
146                         }
147                 else if (strcmp(*argv,"-text") == 0)
148                         text=1;
149                 else if (strcmp(*argv,"-C") == 0)
150                         C=1;
151                 else if (strcmp(*argv,"-genkey") == 0)
152                         {
153                         genkey=1;
154                         need_rand=1;
155                         }
156                 else if (strcmp(*argv,"-rand") == 0)
157                         {
158                         if (--argc < 1) goto bad;
159                         inrand= *(++argv);
160                         need_rand=1;
161                         }
162                 else if (strcmp(*argv,"-noout") == 0)
163                         noout=1;
164                 else if (sscanf(*argv,"%d",&num) == 1)
165                         {
166                         /* generate a key */
167                         numbits=num;
168                         need_rand=1;
169                         }
170                 else
171                         {
172                         BIO_printf(bio_err,"unknown option %s\n",*argv);
173                         badops=1;
174                         break;
175                         }
176                 argc--;
177                 argv++;
178                 }
179
180         if (badops)
181                 {
182 bad:
183                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
184                 BIO_printf(bio_err,"where options are\n");
185                 BIO_printf(bio_err," -inform arg   input format - DER or PEM\n");
186                 BIO_printf(bio_err," -outform arg  output format - DER or PEM\n");
187                 BIO_printf(bio_err," -in arg       input file\n");
188                 BIO_printf(bio_err," -out arg      output file\n");
189                 BIO_printf(bio_err," -text         print as text\n");
190                 BIO_printf(bio_err," -C            Output C code\n");
191                 BIO_printf(bio_err," -noout        no output\n");
192                 BIO_printf(bio_err," -genkey       generate a DSA key\n");
193                 BIO_printf(bio_err," -rand         files to use for random number input\n");
194                 BIO_printf(bio_err," -engine e     use engine e, possibly a hardware device.\n");
195                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
196                 goto end;
197                 }
198
199         ERR_load_crypto_strings();
200
201         in=BIO_new(BIO_s_file());
202         out=BIO_new(BIO_s_file());
203         if ((in == NULL) || (out == NULL))
204                 {
205                 ERR_print_errors(bio_err);
206                 goto end;
207                 }
208
209         if (infile == NULL)
210                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
211         else
212                 {
213                 if (BIO_read_filename(in,infile) <= 0)
214                         {
215                         perror(infile);
216                         goto end;
217                         }
218                 }
219         if (outfile == NULL)
220                 {
221                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
222 #ifdef OPENSSL_SYS_VMS
223                 {
224                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
225                 out = BIO_push(tmpbio, out);
226                 }
227 #endif
228                 }
229         else
230                 {
231                 if (BIO_write_filename(out,outfile) <= 0)
232                         {
233                         perror(outfile);
234                         goto end;
235                         }
236                 }
237
238         e = setup_engine(bio_err, engine, 0);
239
240         if (need_rand)
241                 {
242                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
243                 if (inrand != NULL)
244                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
245                                 app_RAND_load_files(inrand));
246                 }
247
248         if (numbits > 0)
249                 {
250                 assert(need_rand);
251                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
252                 BIO_printf(bio_err,"This could take some time\n");
253                 dsa=DSA_generate_parameters(num,NULL,0,NULL,NULL, dsa_cb,bio_err);
254                 }
255         else if (informat == FORMAT_ASN1)
256                 dsa=d2i_DSAparams_bio(in,NULL);
257         else if (informat == FORMAT_PEM)
258                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
259         else
260                 {
261                 BIO_printf(bio_err,"bad input format specified\n");
262                 goto end;
263                 }
264         if (dsa == NULL)
265                 {
266                 BIO_printf(bio_err,"unable to load DSA parameters\n");
267                 ERR_print_errors(bio_err);
268                 goto end;
269                 }
270
271         if (text)
272                 {
273                 DSAparams_print(out,dsa);
274                 }
275         
276         if (C)
277                 {
278                 unsigned char *data;
279                 int l,len,bits_p,bits_q,bits_g;
280
281                 len=BN_num_bytes(dsa->p);
282                 bits_p=BN_num_bits(dsa->p);
283                 bits_q=BN_num_bits(dsa->q);
284                 bits_g=BN_num_bits(dsa->g);
285                 data=(unsigned char *)OPENSSL_malloc(len+20);
286                 if (data == NULL)
287                         {
288                         perror("OPENSSL_malloc");
289                         goto end;
290                         }
291                 l=BN_bn2bin(dsa->p,data);
292                 printf("static unsigned char dsa%d_p[]={",bits_p);
293                 for (i=0; i<l; i++)
294                         {
295                         if ((i%12) == 0) printf("\n\t");
296                         printf("0x%02X,",data[i]);
297                         }
298                 printf("\n\t};\n");
299
300                 l=BN_bn2bin(dsa->q,data);
301                 printf("static unsigned char dsa%d_q[]={",bits_p);
302                 for (i=0; i<l; i++)
303                         {
304                         if ((i%12) == 0) printf("\n\t");
305                         printf("0x%02X,",data[i]);
306                         }
307                 printf("\n\t};\n");
308
309                 l=BN_bn2bin(dsa->g,data);
310                 printf("static unsigned char dsa%d_g[]={",bits_p);
311                 for (i=0; i<l; i++)
312                         {
313                         if ((i%12) == 0) printf("\n\t");
314                         printf("0x%02X,",data[i]);
315                         }
316                 printf("\n\t};\n\n");
317
318                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
319                 printf("\tDSA *dsa;\n\n");
320                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
321                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
322                         bits_p,bits_p);
323                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
324                         bits_p,bits_p);
325                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
326                         bits_p,bits_p);
327                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
328                 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
329                 printf("\treturn(dsa);\n\t}\n");
330                 }
331
332
333         if (!noout)
334                 {
335                 if      (outformat == FORMAT_ASN1)
336                         i=i2d_DSAparams_bio(out,dsa);
337                 else if (outformat == FORMAT_PEM)
338                         i=PEM_write_bio_DSAparams(out,dsa);
339                 else    {
340                         BIO_printf(bio_err,"bad output format specified for outfile\n");
341                         goto end;
342                         }
343                 if (!i)
344                         {
345                         BIO_printf(bio_err,"unable to write DSA parameters\n");
346                         ERR_print_errors(bio_err);
347                         goto end;
348                         }
349                 }
350         if (genkey)
351                 {
352                 DSA *dsakey;
353
354                 assert(need_rand);
355                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
356                 if (!DSA_generate_key(dsakey)) goto end;
357                 if      (outformat == FORMAT_ASN1)
358                         i=i2d_DSAPrivateKey_bio(out,dsakey);
359                 else if (outformat == FORMAT_PEM)
360                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
361                 else    {
362                         BIO_printf(bio_err,"bad output format specified for outfile\n");
363                         goto end;
364                         }
365                 DSA_free(dsakey);
366                 }
367         if (need_rand)
368                 app_RAND_write_file(NULL, bio_err);
369         ret=0;
370 end:
371         if (in != NULL) BIO_free(in);
372         if (out != NULL) BIO_free_all(out);
373         if (dsa != NULL) DSA_free(dsa);
374         apps_shutdown();
375         EXIT(ret);
376         }
377
378 static void MS_CALLBACK dsa_cb(int p, int n, void *arg)
379         {
380         char c='*';
381
382         if (p == 0) c='.';
383         if (p == 1) c='+';
384         if (p == 2) c='*';
385         if (p == 3) c='\n';
386         BIO_write(arg,&c,1);
387         (void)BIO_flush(arg);
388 #ifdef LINT
389         p=n;
390 #endif
391         }
392 #endif