Move to beta 3.
[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 NO_DSA
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <time.h>
63 #include <string.h>
64 #include "apps.h"
65 #include <openssl/bio.h>
66 #include <openssl/err.h>
67 #include <openssl/bn.h>
68 #include <openssl/rand.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 (one of DER, TXT 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, char *arg);
88 int MAIN(int argc, char **argv)
89         {
90         DSA *dsa=NULL;
91         int i,badops=0,text=0;
92         BIO *in=NULL,*out=NULL;
93         int informat,outformat,noout=0,C=0,ret=1;
94         char *infile,*outfile,*prog,*inrand=NULL;
95         int numbits= -1,num,genkey=0;
96         char buffer[200],*randfile=NULL;
97
98         apps_startup();
99
100         if (bio_err == NULL)
101                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
102                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
103
104         infile=NULL;
105         outfile=NULL;
106         informat=FORMAT_PEM;
107         outformat=FORMAT_PEM;
108
109         prog=argv[0];
110         argc--;
111         argv++;
112         while (argc >= 1)
113                 {
114                 if      (strcmp(*argv,"-inform") == 0)
115                         {
116                         if (--argc < 1) goto bad;
117                         informat=str2fmt(*(++argv));
118                         }
119                 else if (strcmp(*argv,"-outform") == 0)
120                         {
121                         if (--argc < 1) goto bad;
122                         outformat=str2fmt(*(++argv));
123                         }
124                 else if (strcmp(*argv,"-in") == 0)
125                         {
126                         if (--argc < 1) goto bad;
127                         infile= *(++argv);
128                         }
129                 else if (strcmp(*argv,"-out") == 0)
130                         {
131                         if (--argc < 1) goto bad;
132                         outfile= *(++argv);
133                         }
134                 else if (strcmp(*argv,"-text") == 0)
135                         text=1;
136                 else if (strcmp(*argv,"-C") == 0)
137                         C=1;
138                 else if (strcmp(*argv,"-genkey") == 0)
139                         genkey=1;
140                 else if (strcmp(*argv,"-rand") == 0)
141                         {
142                         if (--argc < 1) goto bad;
143                         inrand= *(++argv);
144                         }
145                 else if (strcmp(*argv,"-noout") == 0)
146                         noout=1;
147                 else if (sscanf(*argv,"%d",&num) == 1)
148                         {
149                         /* generate a key */
150                         numbits=num;
151                         }
152                 else
153                         {
154                         BIO_printf(bio_err,"unknown option %s\n",*argv);
155                         badops=1;
156                         break;
157                         }
158                 argc--;
159                 argv++;
160                 }
161
162         if (badops)
163                 {
164 bad:
165                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
166                 BIO_printf(bio_err,"where options are\n");
167                 BIO_printf(bio_err," -inform arg   input format - one of DER TXT PEM\n");
168                 BIO_printf(bio_err," -outform arg  output format - one of DER TXT PEM\n");
169                 BIO_printf(bio_err," -in arg       input file\n");
170                 BIO_printf(bio_err," -out arg      output file\n");
171                 BIO_printf(bio_err," -text         check the DSA parameters\n");
172                 BIO_printf(bio_err," -C            Output C code\n");
173                 BIO_printf(bio_err," -noout        no output\n");
174                 BIO_printf(bio_err," -rand         files to use for random number input\n");
175                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
176                 goto end;
177                 }
178
179         ERR_load_crypto_strings();
180
181         in=BIO_new(BIO_s_file());
182         out=BIO_new(BIO_s_file());
183         if ((in == NULL) || (out == NULL))
184                 {
185                 ERR_print_errors(bio_err);
186                 goto end;
187                 }
188
189         if (infile == NULL)
190                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
191         else
192                 {
193                 if (BIO_read_filename(in,infile) <= 0)
194                         {
195                         perror(infile);
196                         goto end;
197                         }
198                 }
199         if (outfile == NULL)
200                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
201         else
202                 {
203                 if (BIO_write_filename(out,outfile) <= 0)
204                         {
205                         perror(outfile);
206                         goto end;
207                         }
208                 }
209
210         if (numbits > 0)
211                 {
212                 randfile=RAND_file_name(buffer,200);
213                 RAND_load_file(randfile,1024L*1024L);
214
215                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
216                 BIO_printf(bio_err,"This could take some time\n");
217                 dsa=DSA_generate_parameters(num,NULL,0,NULL,NULL,
218                         dsa_cb,(char *)bio_err);
219                 }
220         else if (informat == FORMAT_ASN1)
221                 dsa=d2i_DSAparams_bio(in,NULL);
222         else if (informat == FORMAT_PEM)
223                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL);
224         else
225                 {
226                 BIO_printf(bio_err,"bad input format specified\n");
227                 goto end;
228                 }
229         if (dsa == NULL)
230                 {
231                 BIO_printf(bio_err,"unable to load DSA parameters\n");
232                 ERR_print_errors(bio_err);
233                 goto end;
234                 }
235
236         if (text)
237                 {
238                 DSAparams_print(out,dsa);
239                 }
240         
241         if (C)
242                 {
243                 unsigned char *data;
244                 int l,len,bits_p,bits_q,bits_g;
245
246                 len=BN_num_bytes(dsa->p);
247                 bits_p=BN_num_bits(dsa->p);
248                 bits_q=BN_num_bits(dsa->q);
249                 bits_g=BN_num_bits(dsa->g);
250                 data=(unsigned char *)Malloc(len+20);
251                 if (data == NULL)
252                         {
253                         perror("Malloc");
254                         goto end;
255                         }
256                 l=BN_bn2bin(dsa->p,data);
257                 printf("static unsigned char dsa%d_p[]={",bits_p);
258                 for (i=0; i<l; i++)
259                         {
260                         if ((i%12) == 0) printf("\n\t");
261                         printf("0x%02X,",data[i]);
262                         }
263                 printf("\n\t};\n");
264
265                 l=BN_bn2bin(dsa->q,data);
266                 printf("static unsigned char dsa%d_q[]={",bits_p);
267                 for (i=0; i<l; i++)
268                         {
269                         if ((i%12) == 0) printf("\n\t");
270                         printf("0x%02X,",data[i]);
271                         }
272                 printf("\n\t};\n");
273
274                 l=BN_bn2bin(dsa->g,data);
275                 printf("static unsigned char dsa%d_g[]={",bits_p);
276                 for (i=0; i<l; i++)
277                         {
278                         if ((i%12) == 0) printf("\n\t");
279                         printf("0x%02X,",data[i]);
280                         }
281                 printf("\n\t};\n\n");
282
283                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
284                 printf("\tDSA *dsa;\n\n");
285                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
286                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
287                         bits_p,bits_p);
288                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
289                         bits_p,bits_p);
290                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
291                         bits_p,bits_p);
292                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
293                 printf("\t\treturn(NULL);\n");
294                 printf("\treturn(dsa);\n\t}\n");
295                 }
296
297
298         if (!noout)
299                 {
300                 if      (outformat == FORMAT_ASN1)
301                         i=i2d_DSAparams_bio(out,dsa);
302                 else if (outformat == FORMAT_PEM)
303                         i=PEM_write_bio_DSAparams(out,dsa);
304                 else    {
305                         BIO_printf(bio_err,"bad output format specified for outfile\n");
306                         goto end;
307                         }
308                 if (!i)
309                         {
310                         BIO_printf(bio_err,"unable to write DSA paramaters\n");
311                         ERR_print_errors(bio_err);
312                         goto end;
313                         }
314                 }
315         if (genkey)
316                 {
317                 DSA *dsakey;
318
319                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
320                 if (!DSA_generate_key(dsakey)) goto end;
321                 if      (outformat == FORMAT_ASN1)
322                         i=i2d_DSAPrivateKey_bio(out,dsakey);
323                 else if (outformat == FORMAT_PEM)
324                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL);
325                 else    {
326                         BIO_printf(bio_err,"bad output format specified for outfile\n");
327                         goto end;
328                         }
329                 DSA_free(dsakey);
330                 }
331         ret=0;
332 end:
333         if (in != NULL) BIO_free(in);
334         if (out != NULL) BIO_free(out);
335         if (dsa != NULL) DSA_free(dsa);
336         EXIT(ret);
337         }
338
339 static void MS_CALLBACK dsa_cb(int p, int n, char *arg)
340         {
341         char c='*';
342
343         if (p == 0) c='.';
344         if (p == 1) c='+';
345         if (p == 2) c='*';
346         if (p == 3) c='\n';
347         BIO_write((BIO *)arg,&c,1);
348         BIO_flush((BIO *)arg);
349 #ifdef LINT
350         p=n;
351 #endif
352         }
353 #endif