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
MAIN(int argc,char ** argv)89 int MAIN(int argc, char **argv)
90 {
91 DH *dh=NULL;
92 int i,badops=0,text=0;
93 BIO *in=NULL,*out=NULL;
94 int informat,outformat,check=0,noout=0,C=0,ret=1;
95 char *infile,*outfile,*prog;
96 #ifndef OPENSSL_NO_ENGINE
97 char *engine;
98 #endif
99
100 apps_startup();
101
102 if (bio_err == NULL)
103 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
104 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
105
106 if (!load_config(bio_err, NULL))
107 goto end;
108
109 #ifndef OPENSSL_NO_ENGINE
110 engine=NULL;
111 #endif
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 #ifndef OPENSSL_NO_ENGINE
143 else if (strcmp(*argv,"-engine") == 0)
144 {
145 if (--argc < 1) goto bad;
146 engine= *(++argv);
147 }
148 #endif
149 else if (strcmp(*argv,"-check") == 0)
150 check=1;
151 else if (strcmp(*argv,"-text") == 0)
152 text=1;
153 else if (strcmp(*argv,"-C") == 0)
154 C=1;
155 else if (strcmp(*argv,"-noout") == 0)
156 noout=1;
157 else
158 {
159 BIO_printf(bio_err,"unknown option %s\n",*argv);
160 badops=1;
161 break;
162 }
163 argc--;
164 argv++;
165 }
166
167 if (badops)
168 {
169 bad:
170 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
171 BIO_printf(bio_err,"where options are\n");
172 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n");
173 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n");
174 BIO_printf(bio_err," -in arg input file\n");
175 BIO_printf(bio_err," -out arg output file\n");
176 BIO_printf(bio_err," -check check the DH parameters\n");
177 BIO_printf(bio_err," -text print a text form of the DH parameters\n");
178 BIO_printf(bio_err," -C Output C code\n");
179 BIO_printf(bio_err," -noout no output\n");
180 #ifndef OPENSSL_NO_ENGINE
181 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n");
182 #endif
183 goto end;
184 }
185
186 ERR_load_crypto_strings();
187
188 #ifndef OPENSSL_NO_ENGINE
189 setup_engine(bio_err, engine, 0);
190 #endif
191
192 in=BIO_new(BIO_s_file());
193 out=BIO_new(BIO_s_file());
194 if ((in == NULL) || (out == NULL))
195 {
196 ERR_print_errors(bio_err);
197 goto end;
198 }
199
200 if (infile == NULL)
201 BIO_set_fp(in,stdin,BIO_NOCLOSE);
202 else
203 {
204 if (BIO_read_filename(in,infile) <= 0)
205 {
206 perror(infile);
207 goto end;
208 }
209 }
210 if (outfile == NULL)
211 {
212 BIO_set_fp(out,stdout,BIO_NOCLOSE);
213 #ifdef OPENSSL_SYS_VMS
214 {
215 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
216 out = BIO_push(tmpbio, out);
217 }
218 #endif
219 }
220 else
221 {
222 if (BIO_write_filename(out,outfile) <= 0)
223 {
224 perror(outfile);
225 goto end;
226 }
227 }
228
229 if (informat == FORMAT_ASN1)
230 dh=d2i_DHparams_bio(in,NULL);
231 else if (informat == FORMAT_PEM)
232 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL);
233 else
234 {
235 BIO_printf(bio_err,"bad input format specified\n");
236 goto end;
237 }
238 if (dh == NULL)
239 {
240 BIO_printf(bio_err,"unable to load DH parameters\n");
241 ERR_print_errors(bio_err);
242 goto end;
243 }
244
245
246
247 if (text)
248 {
249 DHparams_print(out,dh);
250 #ifdef undef
251 printf("p=");
252 BN_print(stdout,dh->p);
253 printf("\ng=");
254 BN_print(stdout,dh->g);
255 printf("\n");
256 if (dh->length != 0)
257 printf("recommended private length=%ld\n",dh->length);
258 #endif
259 }
260
261 if (check)
262 {
263 if (!DH_check(dh,&i))
264 {
265 ERR_print_errors(bio_err);
266 goto end;
267 }
268 if (i & DH_CHECK_P_NOT_PRIME)
269 printf("p value is not prime\n");
270 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
271 printf("p value is not a safe prime\n");
272 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
273 printf("unable to check the generator value\n");
274 if (i & DH_NOT_SUITABLE_GENERATOR)
275 printf("the g value is not a generator\n");
276 if (i == 0)
277 printf("DH parameters appear to be ok.\n");
278 }
279 if (C)
280 {
281 unsigned char *data;
282 int len,l,bits;
283
284 len=BN_num_bytes(dh->p);
285 bits=BN_num_bits(dh->p);
286 data=(unsigned char *)OPENSSL_malloc(len);
287 if (data == NULL)
288 {
289 perror("OPENSSL_malloc");
290 goto end;
291 }
292 l=BN_bn2bin(dh->p,data);
293 printf("static unsigned char dh%d_p[]={",bits);
294 for (i=0; i<l; i++)
295 {
296 if ((i%12) == 0) printf("\n\t");
297 printf("0x%02X,",data[i]);
298 }
299 printf("\n\t};\n");
300
301 l=BN_bn2bin(dh->g,data);
302 printf("static unsigned char dh%d_g[]={",bits);
303 for (i=0; i<l; i++)
304 {
305 if ((i%12) == 0) printf("\n\t");
306 printf("0x%02X,",data[i]);
307 }
308 printf("\n\t};\n\n");
309
310 printf("DH *get_dh%d()\n\t{\n",bits);
311 printf("\tDH *dh;\n\n");
312 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
313 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
314 bits,bits);
315 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
316 bits,bits);
317 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
318 printf("\t\treturn(NULL);\n");
319 printf("\treturn(dh);\n\t}\n");
320 OPENSSL_free(data);
321 }
322
323
324 if (!noout)
325 {
326 if (outformat == FORMAT_ASN1)
327 i=i2d_DHparams_bio(out,dh);
328 else if (outformat == FORMAT_PEM)
329 i=PEM_write_bio_DHparams(out,dh);
330 else {
331 BIO_printf(bio_err,"bad output format specified for outfile\n");
332 goto end;
333 }
334 if (!i)
335 {
336 BIO_printf(bio_err,"unable to write DH parameters\n");
337 ERR_print_errors(bio_err);
338 goto end;
339 }
340 }
341 ret=0;
342 end:
343 if (in != NULL) BIO_free(in);
344 if (out != NULL) BIO_free_all(out);
345 if (dh != NULL) DH_free(dh);
346 apps_shutdown();
347 OPENSSL_EXIT(ret);
348 }
349 #else /* !OPENSSL_NO_DH */
350
351 # if PEDANTIC
352 static void *dummy=&dummy;
353 # endif
354
355 #endif
356