Add -clrext option to 'x509'
[openssl.git] / apps / dh.c
1 /* apps/dh.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_DH
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/dh.h>
69 #include <openssl/x509.h>
70 #include <openssl/pem.h>
71
72 #undef PROG
73 #define PROG    dh_main
74
75 /* -inform arg  - input format - default PEM (DER or PEM)
76  * -outform arg - output format - default PEM
77  * -in arg      - input file - default stdin
78  * -out arg     - output file - default stdout
79  * -check       - check the parameters are ok
80  * -noout
81  * -text
82  * -C
83  */
84
85 int MAIN(int, char **);
86
87 int MAIN(int argc, char **argv)
88         {
89         DH *dh=NULL;
90         int i,badops=0,text=0;
91         BIO *in=NULL,*out=NULL;
92         int informat,outformat,check=0,noout=0,C=0,ret=1;
93         char *infile,*outfile,*prog;
94
95         apps_startup();
96
97         if (bio_err == NULL)
98                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
99                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
100
101         infile=NULL;
102         outfile=NULL;
103         informat=FORMAT_PEM;
104         outformat=FORMAT_PEM;
105
106         prog=argv[0];
107         argc--;
108         argv++;
109         while (argc >= 1)
110                 {
111                 if      (strcmp(*argv,"-inform") == 0)
112                         {
113                         if (--argc < 1) goto bad;
114                         informat=str2fmt(*(++argv));
115                         }
116                 else if (strcmp(*argv,"-outform") == 0)
117                         {
118                         if (--argc < 1) goto bad;
119                         outformat=str2fmt(*(++argv));
120                         }
121                 else if (strcmp(*argv,"-in") == 0)
122                         {
123                         if (--argc < 1) goto bad;
124                         infile= *(++argv);
125                         }
126                 else if (strcmp(*argv,"-out") == 0)
127                         {
128                         if (--argc < 1) goto bad;
129                         outfile= *(++argv);
130                         }
131                 else if (strcmp(*argv,"-check") == 0)
132                         check=1;
133                 else if (strcmp(*argv,"-text") == 0)
134                         text=1;
135                 else if (strcmp(*argv,"-C") == 0)
136                         C=1;
137                 else if (strcmp(*argv,"-noout") == 0)
138                         noout=1;
139                 else
140                         {
141                         BIO_printf(bio_err,"unknown option %s\n",*argv);
142                         badops=1;
143                         break;
144                         }
145                 argc--;
146                 argv++;
147                 }
148
149         if (badops)
150                 {
151 bad:
152                 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
153                 BIO_printf(bio_err,"where options are\n");
154                 BIO_printf(bio_err," -inform arg   input format - one of DER PEM\n");
155                 BIO_printf(bio_err," -outform arg  output format - one of DER PEM\n");
156                 BIO_printf(bio_err," -in arg       input file\n");
157                 BIO_printf(bio_err," -out arg      output file\n");
158                 BIO_printf(bio_err," -check        check the DH parameters\n");
159                 BIO_printf(bio_err," -text         print a text form of the DH parameters\n");
160                 BIO_printf(bio_err," -C            Output C code\n");
161                 BIO_printf(bio_err," -noout        no output\n");
162                 goto end;
163                 }
164
165         ERR_load_crypto_strings();
166
167         in=BIO_new(BIO_s_file());
168         out=BIO_new(BIO_s_file());
169         if ((in == NULL) || (out == NULL))
170                 {
171                 ERR_print_errors(bio_err);
172                 goto end;
173                 }
174
175         if (infile == NULL)
176                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
177         else
178                 {
179                 if (BIO_read_filename(in,infile) <= 0)
180                         {
181                         perror(infile);
182                         goto end;
183                         }
184                 }
185         if (outfile == NULL)
186                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
187         else
188                 {
189                 if (BIO_write_filename(out,outfile) <= 0)
190                         {
191                         perror(outfile);
192                         goto end;
193                         }
194                 }
195
196         if      (informat == FORMAT_ASN1)
197                 dh=d2i_DHparams_bio(in,NULL);
198         else if (informat == FORMAT_PEM)
199                 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL);
200         else
201                 {
202                 BIO_printf(bio_err,"bad input format specified\n");
203                 goto end;
204                 }
205         if (dh == NULL)
206                 {
207                 BIO_printf(bio_err,"unable to load DH parameters\n");
208                 ERR_print_errors(bio_err);
209                 goto end;
210                 }
211
212         
213
214         if (text)
215                 {
216                 DHparams_print(out,dh);
217 #ifdef undef
218                 printf("p=");
219                 BN_print(stdout,dh->p);
220                 printf("\ng=");
221                 BN_print(stdout,dh->g);
222                 printf("\n");
223                 if (dh->length != 0)
224                         printf("recommended private length=%ld\n",dh->length);
225 #endif
226                 }
227         
228         if (check)
229                 {
230                 if (!DH_check(dh,&i))
231                         {
232                         ERR_print_errors(bio_err);
233                         goto end;
234                         }
235                 if (i & DH_CHECK_P_NOT_PRIME)
236                         printf("p value is not prime\n");
237                 if (i & DH_CHECK_P_NOT_STRONG_PRIME)
238                         printf("p value is not a strong prime\n");
239                 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
240                         printf("unable to check the generator value\n");
241                 if (i & DH_NOT_SUITABLE_GENERATOR)
242                         printf("the g value is not a generator\n");
243                 if (i == 0)
244                         printf("DH parameters appear to be ok.\n");
245                 }
246         if (C)
247                 {
248                 unsigned char *data;
249                 int len,l,bits;
250
251                 len=BN_num_bytes(dh->p);
252                 bits=BN_num_bits(dh->p);
253                 data=(unsigned char *)Malloc(len);
254                 if (data == NULL)
255                         {
256                         perror("Malloc");
257                         goto end;
258                         }
259                 l=BN_bn2bin(dh->p,data);
260                 printf("static unsigned char dh%d_p[]={",bits);
261                 for (i=0; i<l; i++)
262                         {
263                         if ((i%12) == 0) printf("\n\t");
264                         printf("0x%02X,",data[i]);
265                         }
266                 printf("\n\t};\n");
267
268                 l=BN_bn2bin(dh->g,data);
269                 printf("static unsigned char dh%d_g[]={",bits);
270                 for (i=0; i<l; i++)
271                         {
272                         if ((i%12) == 0) printf("\n\t");
273                         printf("0x%02X,",data[i]);
274                         }
275                 printf("\n\t};\n\n");
276
277                 printf("DH *get_dh%d()\n\t{\n",bits);
278                 printf("\tDH *dh;\n\n");
279                 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
280                 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
281                         bits,bits);
282                 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
283                         bits,bits);
284                 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
285                 printf("\t\treturn(NULL);\n");
286                 printf("\treturn(dh);\n\t}\n");
287                 Free(data);
288                 }
289
290
291         if (!noout)
292                 {
293                 if      (outformat == FORMAT_ASN1)
294                         i=i2d_DHparams_bio(out,dh);
295                 else if (outformat == FORMAT_PEM)
296                         i=PEM_write_bio_DHparams(out,dh);
297                 else    {
298                         BIO_printf(bio_err,"bad output format specified for outfile\n");
299                         goto end;
300                         }
301                 if (!i)
302                         {
303                         BIO_printf(bio_err,"unable to write DH parameters\n");
304                         ERR_print_errors(bio_err);
305                         goto end;
306                         }
307                 }
308         ret=0;
309 end:
310         if (in != NULL) BIO_free(in);
311         if (out != NULL) BIO_free(out);
312         if (dh != NULL) DH_free(dh);
313         EXIT(ret);
314         }
315 #endif