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192.168.1.100 / T106_DC / 797e80b92b11b6b9586658ea9d94dd05c0f6d486 / . / ap / lib / libssl / openssl-1.1.1o / apps / dhparam.c
blob: 98c73214b53e267cfce657a30818cb1f9f09e1f4 [file] [log] [blame]
lh9ed821d2023-04-07 01:36:19 -0700[diff] [blame]1/*
2 * Copyright 1995-2020 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#include <stdio.h>
12#include <stdlib.h>
13#include <time.h>
14#include <string.h>
15#include "apps.h"
16#include "progs.h"
17#include <openssl/bio.h>
18#include <openssl/err.h>
19#include <openssl/bn.h>
20#include <openssl/dh.h>
21#include <openssl/x509.h>
22#include <openssl/pem.h>
23
24#ifndef OPENSSL_NO_DSA
25# include <openssl/dsa.h>
26#endif
27
28#define DEFBITS 2048
29
30static int dh_cb(int p, int n, BN_GENCB *cb);
31
32typedef enum OPTION_choice {
33 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
34 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
35 OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
36 OPT_DSAPARAM, OPT_C, OPT_2, OPT_5,
37 OPT_R_ENUM
38} OPTION_CHOICE;
39
40const OPTIONS dhparam_options[] = {
41 {OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"},
42 {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
43 {"help", OPT_HELP, '-', "Display this summary"},
44 {"in", OPT_IN, '<', "Input file"},
45 {"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
46 {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
47 {"out", OPT_OUT, '>', "Output file"},
48 {"check", OPT_CHECK, '-', "Check the DH parameters"},
49 {"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
50 {"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
51 OPT_R_OPTIONS,
52 {"C", OPT_C, '-', "Print C code"},
53 {"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
54 {"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
55#ifndef OPENSSL_NO_DSA
56 {"dsaparam", OPT_DSAPARAM, '-',
57 "Read or generate DSA parameters, convert to DH"},
58#endif
59#ifndef OPENSSL_NO_ENGINE
60 {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
61#endif
62 {NULL}
63};
64
65int dhparam_main(int argc, char **argv)
66{
67 BIO *in = NULL, *out = NULL;
68 DH *dh = NULL;
69 char *infile = NULL, *outfile = NULL, *prog;
70 ENGINE *e = NULL;
71#ifndef OPENSSL_NO_DSA
72 int dsaparam = 0;
73#endif
74 int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
75 int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
76 OPTION_CHOICE o;
77
78 prog = opt_init(argc, argv, dhparam_options);
79 while ((o = opt_next()) != OPT_EOF) {
80 switch (o) {
81 case OPT_EOF:
82 case OPT_ERR:
83 opthelp:
84 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
85 goto end;
86 case OPT_HELP:
87 opt_help(dhparam_options);
88 ret = 0;
89 goto end;
90 case OPT_INFORM:
91 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
92 goto opthelp;
93 break;
94 case OPT_OUTFORM:
95 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
96 goto opthelp;
97 break;
98 case OPT_IN:
99 infile = opt_arg();
100 break;
101 case OPT_OUT:
102 outfile = opt_arg();
103 break;
104 case OPT_ENGINE:
105 e = setup_engine(opt_arg(), 0);
106 break;
107 case OPT_CHECK:
108 check = 1;
109 break;
110 case OPT_TEXT:
111 text = 1;
112 break;
113 case OPT_DSAPARAM:
114#ifndef OPENSSL_NO_DSA
115 dsaparam = 1;
116#endif
117 break;
118 case OPT_C:
119 C = 1;
120 break;
121 case OPT_2:
122 g = 2;
123 break;
124 case OPT_5:
125 g = 5;
126 break;
127 case OPT_NOOUT:
128 noout = 1;
129 break;
130 case OPT_R_CASES:
131 if (!opt_rand(o))
132 goto end;
133 break;
134 }
135 }
136 argc = opt_num_rest();
137 argv = opt_rest();
138
139 if (argv[0] != NULL && (!opt_int(argv[0], &num) || num <= 0))
140 goto end;
141
142 if (g && !num)
143 num = DEFBITS;
144
145#ifndef OPENSSL_NO_DSA
146 if (dsaparam && g) {
147 BIO_printf(bio_err,
148 "generator may not be chosen for DSA parameters\n");
149 goto end;
150 }
151#endif
152
153 out = bio_open_default(outfile, 'w', outformat);
154 if (out == NULL)
155 goto end;
156
157 /* DH parameters */
158 if (num && !g)
159 g = 2;
160
161 if (num) {
162
163 BN_GENCB *cb;
164 cb = BN_GENCB_new();
165 if (cb == NULL) {
166 ERR_print_errors(bio_err);
167 goto end;
168 }
169
170 BN_GENCB_set(cb, dh_cb, bio_err);
171
172#ifndef OPENSSL_NO_DSA
173 if (dsaparam) {
174 DSA *dsa = DSA_new();
175
176 BIO_printf(bio_err,
177 "Generating DSA parameters, %d bit long prime\n", num);
178 if (dsa == NULL
179 || !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
180 cb)) {
181 DSA_free(dsa);
182 BN_GENCB_free(cb);
183 ERR_print_errors(bio_err);
184 goto end;
185 }
186
187 dh = DSA_dup_DH(dsa);
188 DSA_free(dsa);
189 if (dh == NULL) {
190 BN_GENCB_free(cb);
191 ERR_print_errors(bio_err);
192 goto end;
193 }
194 } else
195#endif
196 {
197 dh = DH_new();
198 BIO_printf(bio_err,
199 "Generating DH parameters, %d bit long safe prime, generator %d\n",
200 num, g);
201 BIO_printf(bio_err, "This is going to take a long time\n");
202 if (dh == NULL || !DH_generate_parameters_ex(dh, num, g, cb)) {
203 BN_GENCB_free(cb);
204 ERR_print_errors(bio_err);
205 goto end;
206 }
207 }
208
209 BN_GENCB_free(cb);
210 } else {
211
212 in = bio_open_default(infile, 'r', informat);
213 if (in == NULL)
214 goto end;
215
216#ifndef OPENSSL_NO_DSA
217 if (dsaparam) {
218 DSA *dsa;
219
220 if (informat == FORMAT_ASN1)
221 dsa = d2i_DSAparams_bio(in, NULL);
222 else /* informat == FORMAT_PEM */
223 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
224
225 if (dsa == NULL) {
226 BIO_printf(bio_err, "unable to load DSA parameters\n");
227 ERR_print_errors(bio_err);
228 goto end;
229 }
230
231 dh = DSA_dup_DH(dsa);
232 DSA_free(dsa);
233 if (dh == NULL) {
234 ERR_print_errors(bio_err);
235 goto end;
236 }
237 } else
238#endif
239 {
240 if (informat == FORMAT_ASN1) {
241 /*
242 * We have no PEM header to determine what type of DH params it
243 * is. We'll just try both.
244 */
245 dh = d2i_DHparams_bio(in, NULL);
246 /* BIO_reset() returns 0 for success for file BIOs only!!! */
247 if (dh == NULL && BIO_reset(in) == 0)
248 dh = d2i_DHxparams_bio(in, NULL);
249 } else {
250 /* informat == FORMAT_PEM */
251 dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
252 }
253
254 if (dh == NULL) {
255 BIO_printf(bio_err, "unable to load DH parameters\n");
256 ERR_print_errors(bio_err);
257 goto end;
258 }
259 }
260
261 /* dh != NULL */
262 }
263
264 if (text) {
265 DHparams_print(out, dh);
266 }
267
268 if (check) {
269 if (!DH_check(dh, &i)) {
270 ERR_print_errors(bio_err);
271 goto end;
272 }
273 if (i & DH_CHECK_P_NOT_PRIME)
274 BIO_printf(bio_err, "WARNING: p value is not prime\n");
275 if (i & DH_CHECK_P_NOT_SAFE_PRIME)
276 BIO_printf(bio_err, "WARNING: p value is not a safe prime\n");
277 if (i & DH_CHECK_Q_NOT_PRIME)
278 BIO_printf(bio_err, "WARNING: q value is not a prime\n");
279 if (i & DH_CHECK_INVALID_Q_VALUE)
280 BIO_printf(bio_err, "WARNING: q value is invalid\n");
281 if (i & DH_CHECK_INVALID_J_VALUE)
282 BIO_printf(bio_err, "WARNING: j value is invalid\n");
283 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
284 BIO_printf(bio_err,
285 "WARNING: unable to check the generator value\n");
286 if (i & DH_NOT_SUITABLE_GENERATOR)
287 BIO_printf(bio_err, "WARNING: the g value is not a generator\n");
288 if (i == 0)
289 BIO_printf(bio_err, "DH parameters appear to be ok.\n");
290 if (num != 0 && i != 0) {
291 /*
292 * We have generated parameters but DH_check() indicates they are
293 * invalid! This should never happen!
294 */
295 BIO_printf(bio_err, "ERROR: Invalid parameters generated\n");
296 goto end;
297 }
298 }
299 if (C) {
300 unsigned char *data;
301 int len, bits;
302 const BIGNUM *pbn, *gbn;
303
304 len = DH_size(dh);
305 bits = DH_bits(dh);
306 DH_get0_pqg(dh, &pbn, NULL, &gbn);
307 data = app_malloc(len, "print a BN");
308
309 BIO_printf(out, "static DH *get_dh%d(void)\n{\n", bits);
310 print_bignum_var(out, pbn, "dhp", bits, data);
311 print_bignum_var(out, gbn, "dhg", bits, data);
312 BIO_printf(out, " DH *dh = DH_new();\n"
313 " BIGNUM *p, *g;\n"
314 "\n"
315 " if (dh == NULL)\n"
316 " return NULL;\n");
317 BIO_printf(out, " p = BN_bin2bn(dhp_%d, sizeof(dhp_%d), NULL);\n",
318 bits, bits);
319 BIO_printf(out, " g = BN_bin2bn(dhg_%d, sizeof(dhg_%d), NULL);\n",
320 bits, bits);
321 BIO_printf(out, " if (p == NULL || g == NULL\n"
322 " || !DH_set0_pqg(dh, p, NULL, g)) {\n"
323 " DH_free(dh);\n"
324 " BN_free(p);\n"
325 " BN_free(g);\n"
326 " return NULL;\n"
327 " }\n");
328 if (DH_get_length(dh) > 0)
329 BIO_printf(out,
330 " if (!DH_set_length(dh, %ld)) {\n"
331 " DH_free(dh);\n"
332 " return NULL;\n"
333 " }\n", DH_get_length(dh));
334 BIO_printf(out, " return dh;\n}\n");
335 OPENSSL_free(data);
336 }
337
338 if (!noout) {
339 const BIGNUM *q;
340 DH_get0_pqg(dh, NULL, &q, NULL);
341 if (outformat == FORMAT_ASN1) {
342 if (q != NULL)
343 i = i2d_DHxparams_bio(out, dh);
344 else
345 i = i2d_DHparams_bio(out, dh);
346 } else if (q != NULL) {
347 i = PEM_write_bio_DHxparams(out, dh);
348 } else {
349 i = PEM_write_bio_DHparams(out, dh);
350 }
351 if (!i) {
352 BIO_printf(bio_err, "unable to write DH parameters\n");
353 ERR_print_errors(bio_err);
354 goto end;
355 }
356 }
357 ret = 0;
358 end:
359 BIO_free(in);
360 BIO_free_all(out);
361 DH_free(dh);
362 release_engine(e);
363 return ret;
364}
365
366static int dh_cb(int p, int n, BN_GENCB *cb)
367{
368 static const char symbols[] = ".+*\n";
369 char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
370
371 BIO_write(BN_GENCB_get_arg(cb), &c, 1);
372 (void)BIO_flush(BN_GENCB_get_arg(cb));
373 return 1;
374}