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source: vbox/trunk/src/libs/openssl-1.1.1f/apps/dhparam.c@ 83663

Last change on this file since 83663 was 83531, checked in by vboxsync, 5 years ago

setting svn:sync-process=export for openssl-1.1.1f, all files except tests
File size: 11.2 KB
Line 
1/*
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <openssl/opensslconf.h>
11#ifdef OPENSSL_NO_DH
12NON_EMPTY_TRANSLATION_UNIT
13#else
14
15# include <stdio.h>
16# include <stdlib.h>
17# include <time.h>
18# include <string.h>
19# include "apps.h"
20# include "progs.h"
21# include <openssl/bio.h>
22# include <openssl/err.h>
23# include <openssl/bn.h>
24# include <openssl/dh.h>
25# include <openssl/x509.h>
26# include <openssl/pem.h>
27
28# ifndef OPENSSL_NO_DSA
29# include <openssl/dsa.h>
30# endif
31
32# define DEFBITS 2048
33
34static int dh_cb(int p, int n, BN_GENCB *cb);
35
36typedef enum OPTION_choice {
37 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
38 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
39 OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
40 OPT_DSAPARAM, OPT_C, OPT_2, OPT_5,
41 OPT_R_ENUM
42} OPTION_CHOICE;
43
44const OPTIONS dhparam_options[] = {
45 {OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"},
46 {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
47 {"help", OPT_HELP, '-', "Display this summary"},
48 {"in", OPT_IN, '<', "Input file"},
49 {"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
50 {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
51 {"out", OPT_OUT, '>', "Output file"},
52 {"check", OPT_CHECK, '-', "Check the DH parameters"},
53 {"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
54 {"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
55 OPT_R_OPTIONS,
56 {"C", OPT_C, '-', "Print C code"},
57 {"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
58 {"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
59# ifndef OPENSSL_NO_DSA
60 {"dsaparam", OPT_DSAPARAM, '-',
61 "Read or generate DSA parameters, convert to DH"},
62# endif
63# ifndef OPENSSL_NO_ENGINE
64 {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
65# endif
66 {NULL}
67};
68
69int dhparam_main(int argc, char **argv)
70{
71 BIO *in = NULL, *out = NULL;
72 DH *dh = NULL;
73 char *infile = NULL, *outfile = NULL, *prog;
74 ENGINE *e = NULL;
75#ifndef OPENSSL_NO_DSA
76 int dsaparam = 0;
77#endif
78 int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
79 int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
80 OPTION_CHOICE o;
81
82 prog = opt_init(argc, argv, dhparam_options);
83 while ((o = opt_next()) != OPT_EOF) {
84 switch (o) {
85 case OPT_EOF:
86 case OPT_ERR:
87 opthelp:
88 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
89 goto end;
90 case OPT_HELP:
91 opt_help(dhparam_options);
92 ret = 0;
93 goto end;
94 case OPT_INFORM:
95 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
96 goto opthelp;
97 break;
98 case OPT_OUTFORM:
99 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
100 goto opthelp;
101 break;
102 case OPT_IN:
103 infile = opt_arg();
104 break;
105 case OPT_OUT:
106 outfile = opt_arg();
107 break;
108 case OPT_ENGINE:
109 e = setup_engine(opt_arg(), 0);
110 break;
111 case OPT_CHECK:
112 check = 1;
113 break;
114 case OPT_TEXT:
115 text = 1;
116 break;
117 case OPT_DSAPARAM:
118#ifndef OPENSSL_NO_DSA
119 dsaparam = 1;
120#endif
121 break;
122 case OPT_C:
123 C = 1;
124 break;
125 case OPT_2:
126 g = 2;
127 break;
128 case OPT_5:
129 g = 5;
130 break;
131 case OPT_NOOUT:
132 noout = 1;
133 break;
134 case OPT_R_CASES:
135 if (!opt_rand(o))
136 goto end;
137 break;
138 }
139 }
140 argc = opt_num_rest();
141 argv = opt_rest();
142
143 if (argv[0] != NULL && (!opt_int(argv[0], &num) || num <= 0))
144 goto end;
145
146 if (g && !num)
147 num = DEFBITS;
148
149# ifndef OPENSSL_NO_DSA
150 if (dsaparam && g) {
151 BIO_printf(bio_err,
152 "generator may not be chosen for DSA parameters\n");
153 goto end;
154 }
155# endif
156
157 out = bio_open_default(outfile, 'w', outformat);
158 if (out == NULL)
159 goto end;
160
161 /* DH parameters */
162 if (num && !g)
163 g = 2;
164
165 if (num) {
166
167 BN_GENCB *cb;
168 cb = BN_GENCB_new();
169 if (cb == NULL) {
170 ERR_print_errors(bio_err);
171 goto end;
172 }
173
174 BN_GENCB_set(cb, dh_cb, bio_err);
175
176# ifndef OPENSSL_NO_DSA
177 if (dsaparam) {
178 DSA *dsa = DSA_new();
179
180 BIO_printf(bio_err,
181 "Generating DSA parameters, %d bit long prime\n", num);
182 if (dsa == NULL
183 || !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
184 cb)) {
185 DSA_free(dsa);
186 BN_GENCB_free(cb);
187 ERR_print_errors(bio_err);
188 goto end;
189 }
190
191 dh = DSA_dup_DH(dsa);
192 DSA_free(dsa);
193 if (dh == NULL) {
194 BN_GENCB_free(cb);
195 ERR_print_errors(bio_err);
196 goto end;
197 }
198 } else
199# endif
200 {
201 dh = DH_new();
202 BIO_printf(bio_err,
203 "Generating DH parameters, %d bit long safe prime, generator %d\n",
204 num, g);
205 BIO_printf(bio_err, "This is going to take a long time\n");
206 if (dh == NULL || !DH_generate_parameters_ex(dh, num, g, cb)) {
207 BN_GENCB_free(cb);
208 ERR_print_errors(bio_err);
209 goto end;
210 }
211 }
212
213 BN_GENCB_free(cb);
214 } else {
215
216 in = bio_open_default(infile, 'r', informat);
217 if (in == NULL)
218 goto end;
219
220# ifndef OPENSSL_NO_DSA
221 if (dsaparam) {
222 DSA *dsa;
223
224 if (informat == FORMAT_ASN1)
225 dsa = d2i_DSAparams_bio(in, NULL);
226 else /* informat == FORMAT_PEM */
227 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
228
229 if (dsa == NULL) {
230 BIO_printf(bio_err, "unable to load DSA parameters\n");
231 ERR_print_errors(bio_err);
232 goto end;
233 }
234
235 dh = DSA_dup_DH(dsa);
236 DSA_free(dsa);
237 if (dh == NULL) {
238 ERR_print_errors(bio_err);
239 goto end;
240 }
241 } else
242# endif
243 {
244 if (informat == FORMAT_ASN1) {
245 /*
246 * We have no PEM header to determine what type of DH params it
247 * is. We'll just try both.
248 */
249 dh = d2i_DHparams_bio(in, NULL);
250 /* BIO_reset() returns 0 for success for file BIOs only!!! */
251 if (dh == NULL && BIO_reset(in) == 0)
252 dh = d2i_DHxparams_bio(in, NULL);
253 } else {
254 /* informat == FORMAT_PEM */
255 dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
256 }
257
258 if (dh == NULL) {
259 BIO_printf(bio_err, "unable to load DH parameters\n");
260 ERR_print_errors(bio_err);
261 goto end;
262 }
263 }
264
265 /* dh != NULL */
266 }
267
268 if (text) {
269 DHparams_print(out, dh);
270 }
271
272 if (check) {
273 if (!DH_check(dh, &i)) {
274 ERR_print_errors(bio_err);
275 goto end;
276 }
277 if (i & DH_CHECK_P_NOT_PRIME)
278 BIO_printf(bio_err, "WARNING: p value is not prime\n");
279 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
280 BIO_printf(bio_err, "WARNING: p value is not a safe prime\n");
281 if (i & DH_CHECK_Q_NOT_PRIME)
282 BIO_printf(bio_err, "WARNING: q value is not a prime\n");
283 if (i & DH_CHECK_INVALID_Q_VALUE)
284 BIO_printf(bio_err, "WARNING: q value is invalid\n");
285 if (i & DH_CHECK_INVALID_J_VALUE)
286 BIO_printf(bio_err, "WARNING: j value is invalid\n");
287 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
288 BIO_printf(bio_err,
289 "WARNING: unable to check the generator value\n");
290 if (i & DH_NOT_SUITABLE_GENERATOR)
291 BIO_printf(bio_err, "WARNING: the g value is not a generator\n");
292 if (i == 0)
293 BIO_printf(bio_err, "DH parameters appear to be ok.\n");
294 if (num != 0 && i != 0) {
295 /*
296 * We have generated parameters but DH_check() indicates they are
297 * invalid! This should never happen!
298 */
299 BIO_printf(bio_err, "ERROR: Invalid parameters generated\n");
300 goto end;
301 }
302 }
303 if (C) {
304 unsigned char *data;
305 int len, bits;
306 const BIGNUM *pbn, *gbn;
307
308 len = DH_size(dh);
309 bits = DH_bits(dh);
310 DH_get0_pqg(dh, &pbn, NULL, &gbn);
311 data = app_malloc(len, "print a BN");
312
313 BIO_printf(out, "static DH *get_dh%d(void)\n{\n", bits);
314 print_bignum_var(out, pbn, "dhp", bits, data);
315 print_bignum_var(out, gbn, "dhg", bits, data);
316 BIO_printf(out, " DH *dh = DH_new();\n"
317 " BIGNUM *p, *g;\n"
318 "\n"
319 " if (dh == NULL)\n"
320 " return NULL;\n");
321 BIO_printf(out, " p = BN_bin2bn(dhp_%d, sizeof(dhp_%d), NULL);\n",
322 bits, bits);
323 BIO_printf(out, " g = BN_bin2bn(dhg_%d, sizeof(dhg_%d), NULL);\n",
324 bits, bits);
325 BIO_printf(out, " if (p == NULL || g == NULL\n"
326 " || !DH_set0_pqg(dh, p, NULL, g)) {\n"
327 " DH_free(dh);\n"
328 " BN_free(p);\n"
329 " BN_free(g);\n"
330 " return NULL;\n"
331 " }\n");
332 if (DH_get_length(dh) > 0)
333 BIO_printf(out,
334 " if (!DH_set_length(dh, %ld)) {\n"
335 " DH_free(dh);\n"
336 " return NULL;\n"
337 " }\n", DH_get_length(dh));
338 BIO_printf(out, " return dh;\n}\n");
339 OPENSSL_free(data);
340 }
341
342 if (!noout) {
343 const BIGNUM *q;
344 DH_get0_pqg(dh, NULL, &q, NULL);
345 if (outformat == FORMAT_ASN1) {
346 if (q != NULL)
347 i = i2d_DHxparams_bio(out, dh);
348 else
349 i = i2d_DHparams_bio(out, dh);
350 } else if (q != NULL) {
351 i = PEM_write_bio_DHxparams(out, dh);
352 } else {
353 i = PEM_write_bio_DHparams(out, dh);
354 }
355 if (!i) {
356 BIO_printf(bio_err, "unable to write DH parameters\n");
357 ERR_print_errors(bio_err);
358 goto end;
359 }
360 }
361 ret = 0;
362 end:
363 BIO_free(in);
364 BIO_free_all(out);
365 DH_free(dh);
366 release_engine(e);
367 return ret;
368}
369
370static int dh_cb(int p, int n, BN_GENCB *cb)
371{
372 static const char symbols[] = ".+*\n";
373 char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
374
375 BIO_write(BN_GENCB_get_arg(cb), &c, 1);
376 (void)BIO_flush(BN_GENCB_get_arg(cb));
377 return 1;
378}
379#endif
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