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[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 <stdio.h>
60 #include <stdlib.h>
61 #include <time.h>
62 #include <string.h>
63 #include "apps.h"
64 #include <openssl/bio.h>
65 #include <openssl/err.h>
66 #include <openssl/bn.h>
67 #include <openssl/rand.h>
68 #include <openssl/dsa.h>
69 #include <openssl/x509.h>
70 #include <openssl/pem.h>
71
72 #undef PROG
73 #define PROG    dsaparam_main
74
75 /* -inform arg  - input format - default PEM (one of DER, TXT or PEM)
76  * -outform arg - output format - default PEM
77  * -in arg      - input file - default stdin
78  * -out arg     - output file - default stdout
79  * -noout
80  * -text
81  * -C
82  * -noout
83  * -genkey
84  */
85
86 #ifndef NOPROTO
87 static void MS_CALLBACK dsa_cb(int p, int n, char *arg);
88 #else
89 static void MS_CALLBACK dsa_cb();
90 #endif
91
92 int MAIN(int argc, char **argv)
93         {
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         char buffer[200],*randfile=NULL;
101
102         apps_startup();
103
104         if (bio_err == NULL)
105                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
106                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
107
108         infile=NULL;
109         outfile=NULL;
110         informat=FORMAT_PEM;
111         outformat=FORMAT_PEM;
112
113         prog=argv[0];
114         argc--;
115         argv++;
116         while (argc >= 1)
117                 {
118                 if      (strcmp(*argv,"-inform") == 0)
119                         {
120                         if (--argc < 1) goto bad;
121                         informat=str2fmt(*(++argv));
122                         }
123                 else if (strcmp(*argv,"-outform") == 0)
124                         {
125                         if (--argc < 1) goto bad;
126                         outformat=str2fmt(*(++argv));
127                         }
128                 else if (strcmp(*argv,"-in") == 0)
129                         {
130                         if (--argc < 1) goto bad;
131                         infile= *(++argv);
132                         }
133                 else if (strcmp(*argv,"-out") == 0)
134                         {
135                         if (--argc < 1) goto bad;
136                         outfile= *(++argv);
137                         }
138                 else if (strcmp(*argv,"-text") == 0)
139                         text=1;
140                 else if (strcmp(*argv,"-C") == 0)
141                         C=1;
142                 else if (strcmp(*argv,"-genkey") == 0)
143                         genkey=1;
144                 else if (strcmp(*argv,"-rand") == 0)
145                         {
146                         if (--argc < 1) goto bad;
147                         inrand= *(++argv);
148                         }
149                 else if (strcmp(*argv,"-noout") == 0)
150                         noout=1;
151                 else if (sscanf(*argv,"%d",&num) == 1)
152                         {
153                         /* generate a key */
154                         numbits=num;
155                         }
156                 else
157                         {
158                         BIO_printf(bio_err,"unknown option %s\n",*argv);
159                         badops=1;
160                         break;
161                         }
162                 argc--;
163                 argv++;
164                 }
165
166         if (badops)
167                 {
168 bad:
169                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
170                 BIO_printf(bio_err,"where options are\n");
171                 BIO_printf(bio_err," -inform arg   input format - one of DER TXT PEM\n");
172                 BIO_printf(bio_err," -outform arg  output format - one of DER TXT PEM\n");
173                 BIO_printf(bio_err," -in arg       input file\n");
174                 BIO_printf(bio_err," -out arg      output file\n");
175                 BIO_printf(bio_err," -text         check the DSA parameters\n");
176                 BIO_printf(bio_err," -C            Output C code\n");
177                 BIO_printf(bio_err," -noout        no output\n");
178                 BIO_printf(bio_err," -rand         files to use for random number input\n");
179                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
180                 goto end;
181                 }
182
183         ERR_load_crypto_strings();
184
185         in=BIO_new(BIO_s_file());
186         out=BIO_new(BIO_s_file());
187         if ((in == NULL) || (out == NULL))
188                 {
189                 ERR_print_errors(bio_err);
190                 goto end;
191                 }
192
193         if (infile == NULL)
194                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
195         else
196                 {
197                 if (BIO_read_filename(in,infile) <= 0)
198                         {
199                         perror(infile);
200                         goto end;
201                         }
202                 }
203         if (outfile == NULL)
204                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
205         else
206                 {
207                 if (BIO_write_filename(out,outfile) <= 0)
208                         {
209                         perror(outfile);
210                         goto end;
211                         }
212                 }
213
214         if (numbits > 0)
215                 {
216                 randfile=RAND_file_name(buffer,200);
217                 RAND_load_file(randfile,1024L*1024L);
218
219                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
220                 BIO_printf(bio_err,"This could take some time\n");
221                 dsa=DSA_generate_parameters(num,NULL,0,NULL,NULL,
222                         dsa_cb,(char *)bio_err);
223                 }
224         else if (informat == FORMAT_ASN1)
225                 dsa=d2i_DSAparams_bio(in,NULL);
226         else if (informat == FORMAT_PEM)
227                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL);
228         else
229                 {
230                 BIO_printf(bio_err,"bad input format specified\n");
231                 goto end;
232                 }
233         if (dsa == NULL)
234                 {
235                 BIO_printf(bio_err,"unable to load DSA parameters\n");
236                 ERR_print_errors(bio_err);
237                 goto end;
238                 }
239
240         if (text)
241                 {
242                 DSAparams_print(out,dsa);
243                 }
244         
245         if (C)
246                 {
247                 unsigned char *data;
248                 int l,len,bits_p,bits_q,bits_g;
249
250                 len=BN_num_bytes(dsa->p);
251                 bits_p=BN_num_bits(dsa->p);
252                 bits_q=BN_num_bits(dsa->q);
253                 bits_g=BN_num_bits(dsa->g);
254                 data=(unsigned char *)Malloc(len+20);
255                 if (data == NULL)
256                         {
257                         perror("Malloc");
258                         goto end;
259                         }
260                 l=BN_bn2bin(dsa->p,data);
261                 printf("static unsigned char dsa%d_p[]={",bits_p);
262                 for (i=0; i<l; i++)
263                         {
264                         if ((i%12) == 0) printf("\n\t");
265                         printf("0x%02X,",data[i]);
266                         }
267                 printf("\n\t};\n");
268
269                 l=BN_bn2bin(dsa->q,data);
270                 printf("static unsigned char dsa%d_q[]={",bits_p);
271                 for (i=0; i<l; i++)
272                         {
273                         if ((i%12) == 0) printf("\n\t");
274                         printf("0x%02X,",data[i]);
275                         }
276                 printf("\n\t};\n");
277
278                 l=BN_bn2bin(dsa->g,data);
279                 printf("static unsigned char dsa%d_g[]={",bits_p);
280                 for (i=0; i<l; i++)
281                         {
282                         if ((i%12) == 0) printf("\n\t");
283                         printf("0x%02X,",data[i]);
284                         }
285                 printf("\n\t};\n\n");
286
287                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
288                 printf("\tDSA *dsa;\n\n");
289                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
290                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
291                         bits_p,bits_p);
292                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
293                         bits_p,bits_p);
294                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
295                         bits_p,bits_p);
296                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
297                 printf("\t\treturn(NULL);\n");
298                 printf("\treturn(dsa);\n\t}\n");
299                 }
300
301
302         if (!noout)
303                 {
304                 if      (outformat == FORMAT_ASN1)
305                         i=i2d_DSAparams_bio(out,dsa);
306                 else if (outformat == FORMAT_PEM)
307                         i=PEM_write_bio_DSAparams(out,dsa);
308                 else    {
309                         BIO_printf(bio_err,"bad output format specified for outfile\n");
310                         goto end;
311                         }
312                 if (!i)
313                         {
314                         BIO_printf(bio_err,"unable to write DSA paramaters\n");
315                         ERR_print_errors(bio_err);
316                         goto end;
317                         }
318                 }
319         if (genkey)
320                 {
321                 DSA *dsakey;
322
323                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
324                 if (!DSA_generate_key(dsakey)) goto end;
325                 if      (outformat == FORMAT_ASN1)
326                         i=i2d_DSAPrivateKey_bio(out,dsakey);
327                 else if (outformat == FORMAT_PEM)
328                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL);
329                 else    {
330                         BIO_printf(bio_err,"bad output format specified for outfile\n");
331                         goto end;
332                         }
333                 DSA_free(dsakey);
334                 }
335         ret=0;
336 end:
337         if (in != NULL) BIO_free(in);
338         if (out != NULL) BIO_free(out);
339         if (dsa != NULL) DSA_free(dsa);
340         EXIT(ret);
341         }
342
343 static void MS_CALLBACK dsa_cb(int p, int n, char *arg)
344         {
345         char c='*';
346
347         if (p == 0) c='.';
348         if (p == 1) c='+';
349         if (p == 2) c='*';
350         if (p == 3) c='\n';
351         BIO_write((BIO *)arg,&c,1);
352         BIO_flush((BIO *)arg);
353 #ifdef LINT
354         p=n;
355 #endif
356         }