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 #ifndef OPENSSL_NO_ENGINE
92 ENGINE *e = NULL;
93 #endif
94 DH *dh=NULL;
95 int i,badops=0,text=0;
96 BIO *in=NULL,*out=NULL;
97 int informat,outformat,check=0,noout=0,C=0,ret=1;
98 char *infile,*outfile,*prog;
99 #ifndef OPENSSL_NO_ENGINE
100 char *engine;
101 #endif
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 #ifndef OPENSSL_NO_ENGINE
113 engine=NULL;
114 #endif
115 infile=NULL;
116 outfile=NULL;
117 informat=FORMAT_PEM;
118 outformat=FORMAT_PEM;
119
120 prog=argv[0];
121 argc--;
122 argv++;
123 while (argc >= 1)
124 {
125 if (strcmp(*argv,"-inform") == 0)
126 {
127 if (--argc < 1) goto bad;
128 informat=str2fmt(*(++argv));
129 }
130 else if (strcmp(*argv,"-outform") == 0)
131 {
132 if (--argc < 1) goto bad;
133 outformat=str2fmt(*(++argv));
134 }
135 else if (strcmp(*argv,"-in") == 0)
136 {
137 if (--argc < 1) goto bad;
138 infile= *(++argv);
139 }
140 else if (strcmp(*argv,"-out") == 0)
141 {
142 if (--argc < 1) goto bad;
143 outfile= *(++argv);
144 }
145 #ifndef OPENSSL_NO_ENGINE
146 else if (strcmp(*argv,"-engine") == 0)
147 {
148 if (--argc < 1) goto bad;
149 engine= *(++argv);
150 }
151 #endif
152 else if (strcmp(*argv,"-check") == 0)
153 check=1;
154 else if (strcmp(*argv,"-text") == 0)
155 text=1;
156 else if (strcmp(*argv,"-C") == 0)
157 C=1;
158 else if (strcmp(*argv,"-noout") == 0)
159 noout=1;
160 else
161 {
162 BIO_printf(bio_err,"unknown option %s\n",*argv);
163 badops=1;
164 break;
165 }
166 argc--;
167 argv++;
168 }
169
170 if (badops)
171 {
172 bad:
173 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
174 BIO_printf(bio_err,"where options are\n");
175 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n");
176 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n");
177 BIO_printf(bio_err," -in arg input file\n");
178 BIO_printf(bio_err," -out arg output file\n");
179 BIO_printf(bio_err," -check check the DH parameters\n");
180 BIO_printf(bio_err," -text print a text form of the DH parameters\n");
181 BIO_printf(bio_err," -C Output C code\n");
182 BIO_printf(bio_err," -noout no output\n");
183 #ifndef OPENSSL_NO_ENGINE
184 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n");
185 #endif
186 goto end;
187 }
188
189 ERR_load_crypto_strings();
190
191 #ifndef OPENSSL_NO_ENGINE
192 e = setup_engine(bio_err, engine, 0);
193 #endif
194
195 in=BIO_new(BIO_s_file());
196 out=BIO_new(BIO_s_file());
197 if ((in == NULL) || (out == NULL))
198 {
199 ERR_print_errors(bio_err);
200 goto end;
201 }
202
203 if (infile == NULL)
204 BIO_set_fp(in,stdin,BIO_NOCLOSE);
205 else
206 {
207 if (BIO_read_filename(in,infile) <= 0)
208 {
209 perror(infile);
210 goto end;
211 }
212 }
213 if (outfile == NULL)
214 {
215 BIO_set_fp(out,stdout,BIO_NOCLOSE);
216 #ifdef OPENSSL_SYS_VMS
217 {
218 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
219 out = BIO_push(tmpbio, out);
220 }
221 #endif
222 }
223 else
224 {
225 if (BIO_write_filename(out,outfile) <= 0)
226 {
227 perror(outfile);
228 goto end;
229 }
230 }
231
232 if (informat == FORMAT_ASN1)
233 dh=d2i_DHparams_bio(in,NULL);
234 else if (informat == FORMAT_PEM)
235 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL);
236 else
237 {
238 BIO_printf(bio_err,"bad input format specified\n");
239 goto end;
240 }
241 if (dh == NULL)
242 {
243 BIO_printf(bio_err,"unable to load DH parameters\n");
244 ERR_print_errors(bio_err);
245 goto end;
246 }
247
248
249
250 if (text)
251 {
252 DHparams_print(out,dh);
253 #ifdef undef
254 printf("p=");
255 BN_print(stdout,dh->p);
256 printf("\ng=");
257 BN_print(stdout,dh->g);
258 printf("\n");
259 if (dh->length != 0)
260 printf("recommended private length=%ld\n",dh->length);
261 #endif
262 }
263
264 if (check)
265 {
266 if (!DH_check(dh,&i))
267 {
268 ERR_print_errors(bio_err);
269 goto end;
270 }
271 if (i & DH_CHECK_P_NOT_PRIME)
272 printf("p value is not prime\n");
273 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
274 printf("p value is not a safe prime\n");
275 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
276 printf("unable to check the generator value\n");
277 if (i & DH_NOT_SUITABLE_GENERATOR)
278 printf("the g value is not a generator\n");
279 if (i == 0)
280 printf("DH parameters appear to be ok.\n");
281 }
282 if (C)
283 {
284 unsigned char *data;
285 int len,l,bits;
286
287 len=BN_num_bytes(dh->p);
288 bits=BN_num_bits(dh->p);
289 data=(unsigned char *)OPENSSL_malloc(len);
290 if (data == NULL)
291 {
292 perror("OPENSSL_malloc");
293 goto end;
294 }
295 l=BN_bn2bin(dh->p,data);
296 printf("static unsigned char dh%d_p[]={",bits);
297 for (i=0; i<l; i++)
298 {
299 if ((i%12) == 0) printf("\n\t");
300 printf("0x%02X,",data[i]);
301 }
302 printf("\n\t};\n");
303
304 l=BN_bn2bin(dh->g,data);
305 printf("static unsigned char dh%d_g[]={",bits);
306 for (i=0; i<l; i++)
307 {
308 if ((i%12) == 0) printf("\n\t");
309 printf("0x%02X,",data[i]);
310 }
311 printf("\n\t};\n\n");
312
313 printf("DH *get_dh%d()\n\t{\n",bits);
314 printf("\tDH *dh;\n\n");
315 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
316 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
317 bits,bits);
318 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
319 bits,bits);
320 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
321 printf("\t\treturn(NULL);\n");
322 printf("\treturn(dh);\n\t}\n");
323 OPENSSL_free(data);
324 }
325
326
327 if (!noout)
328 {
329 if (outformat == FORMAT_ASN1)
330 i=i2d_DHparams_bio(out,dh);
331 else if (outformat == FORMAT_PEM)
332 i=PEM_write_bio_DHparams(out,dh);
333 else {
334 BIO_printf(bio_err,"bad output format specified for outfile\n");
335 goto end;
336 }
337 if (!i)
338 {
339 BIO_printf(bio_err,"unable to write DH parameters\n");
340 ERR_print_errors(bio_err);
341 goto end;
342 }
343 }
344 ret=0;
345 end:
346 if (in != NULL) BIO_free(in);
347 if (out != NULL) BIO_free_all(out);
348 if (dh != NULL) DH_free(dh);
349 apps_shutdown();
350 OPENSSL_EXIT(ret);
351 }
352 #endif
353