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846e33c7 | 1 | /* |
2234212c | 2 | * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved. |
41918458 | 3 | * |
846e33c7 RS |
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 | |
41918458 | 8 | */ |
09483c58 | 9 | |
effaf4de RS |
10 | #include <openssl/opensslconf.h> |
11 | #ifdef OPENSSL_NO_DH | |
12 | NON_EMPTY_TRANSLATION_UNIT | |
13 | #else | |
14 | ||
0f113f3e MC |
15 | # include <stdio.h> |
16 | # include <stdlib.h> | |
17 | # include <time.h> | |
18 | # include <string.h> | |
19 | # include "apps.h" | |
20 | # include <openssl/bio.h> | |
21 | # include <openssl/err.h> | |
22 | # include <openssl/bn.h> | |
23 | # include <openssl/dh.h> | |
24 | # include <openssl/x509.h> | |
25 | # include <openssl/pem.h> | |
26 | ||
27 | # ifndef OPENSSL_NO_DSA | |
28 | # include <openssl/dsa.h> | |
29 | # endif | |
41918458 | 30 | |
0f113f3e | 31 | # define DEFBITS 2048 |
09483c58 | 32 | |
6d23cf97 | 33 | static int dh_cb(int p, int n, BN_GENCB *cb); |
09483c58 | 34 | |
7e1b7485 RS |
35 | typedef enum OPTION_choice { |
36 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, | |
37 | OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, | |
38 | OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT, | |
39 | OPT_RAND, OPT_DSAPARAM, OPT_C, OPT_2, OPT_5 | |
40 | } OPTION_CHOICE; | |
41 | ||
44c83ebd | 42 | const OPTIONS dhparam_options[] = { |
7e1b7485 RS |
43 | {OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"}, |
44 | {OPT_HELP_STR, 1, '-', "Valid options are:\n"}, | |
45 | {"help", OPT_HELP, '-', "Display this summary"}, | |
46 | {"in", OPT_IN, '<', "Input file"}, | |
47 | {"inform", OPT_INFORM, 'F', "Input format, DER or PEM"}, | |
48 | {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"}, | |
49 | {"out", OPT_OUT, '>', "Output file"}, | |
50 | {"check", OPT_CHECK, '-', "Check the DH parameters"}, | |
51 | {"text", OPT_TEXT, '-', "Print a text form of the DH parameters"}, | |
16e1b281 | 52 | {"noout", OPT_NOOUT, '-', "Don't output any DH parameters"}, |
7e1b7485 RS |
53 | {"rand", OPT_RAND, 's', |
54 | "Load the file(s) into the random number generator"}, | |
55 | {"C", OPT_C, '-', "Print C code"}, | |
56 | {"2", OPT_2, '-', "Generate parameters using 2 as the generator value"}, | |
57 | {"5", OPT_5, '-', "Generate parameters using 5 as the generator value"}, | |
7e1b7485 RS |
58 | # ifndef OPENSSL_NO_DSA |
59 | {"dsaparam", OPT_DSAPARAM, '-', | |
60 | "Read or generate DSA parameters, convert to DH"}, | |
9c3bcfa0 RS |
61 | # endif |
62 | # ifndef OPENSSL_NO_ENGINE | |
63 | {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"}, | |
0f113f3e | 64 | # endif |
7e1b7485 RS |
65 | {NULL} |
66 | }; | |
67 | ||
68 | int dhparam_main(int argc, char **argv) | |
69 | { | |
70 | BIO *in = NULL, *out = NULL; | |
71 | DH *dh = NULL; | |
333b070e | 72 | char *infile = NULL, *outfile = NULL, *prog, *inrand = NULL; |
dd1abd44 | 73 | ENGINE *e = NULL; |
83ae8124 MC |
74 | #ifndef OPENSSL_NO_DSA |
75 | int dsaparam = 0; | |
76 | #endif | |
77 | int i, text = 0, C = 0, ret = 1, num = 0, g = 0; | |
7e1b7485 RS |
78 | int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0; |
79 | OPTION_CHOICE o; | |
80 | ||
81 | prog = opt_init(argc, argv, dhparam_options); | |
82 | while ((o = opt_next()) != OPT_EOF) { | |
83 | switch (o) { | |
84 | case OPT_EOF: | |
85 | case OPT_ERR: | |
86 | opthelp: | |
87 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); | |
88 | goto end; | |
89 | case OPT_HELP: | |
90 | opt_help(dhparam_options); | |
91 | ret = 0; | |
92 | goto end; | |
93 | case OPT_INFORM: | |
94 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat)) | |
95 | goto opthelp; | |
96 | break; | |
97 | case OPT_OUTFORM: | |
98 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat)) | |
99 | goto opthelp; | |
100 | break; | |
101 | case OPT_IN: | |
102 | infile = opt_arg(); | |
103 | break; | |
104 | case OPT_OUT: | |
105 | outfile = opt_arg(); | |
106 | break; | |
107 | case OPT_ENGINE: | |
dd1abd44 | 108 | e = setup_engine(opt_arg(), 0); |
7e1b7485 RS |
109 | break; |
110 | case OPT_CHECK: | |
0f113f3e | 111 | check = 1; |
7e1b7485 RS |
112 | break; |
113 | case OPT_TEXT: | |
0f113f3e | 114 | text = 1; |
7e1b7485 RS |
115 | break; |
116 | case OPT_DSAPARAM: | |
83ae8124 | 117 | #ifndef OPENSSL_NO_DSA |
0f113f3e | 118 | dsaparam = 1; |
83ae8124 | 119 | #endif |
7e1b7485 RS |
120 | break; |
121 | case OPT_C: | |
0f113f3e | 122 | C = 1; |
7e1b7485 RS |
123 | break; |
124 | case OPT_2: | |
0f113f3e | 125 | g = 2; |
7e1b7485 RS |
126 | break; |
127 | case OPT_5: | |
0f113f3e | 128 | g = 5; |
7e1b7485 RS |
129 | break; |
130 | case OPT_NOOUT: | |
131 | noout = 1; | |
132 | break; | |
133 | case OPT_RAND: | |
134 | inrand = opt_arg(); | |
135 | break; | |
136 | } | |
0f113f3e | 137 | } |
7e1b7485 RS |
138 | argc = opt_num_rest(); |
139 | argv = opt_rest(); | |
0f113f3e | 140 | |
2234212c | 141 | if (argv[0] != NULL && (!opt_int(argv[0], &num) || num <= 0)) |
0f113f3e | 142 | goto end; |
0f113f3e | 143 | |
0f113f3e MC |
144 | if (g && !num) |
145 | num = DEFBITS; | |
146 | ||
147 | # ifndef OPENSSL_NO_DSA | |
7e1b7485 RS |
148 | if (dsaparam && g) { |
149 | BIO_printf(bio_err, | |
150 | "generator may not be chosen for DSA parameters\n"); | |
151 | goto end; | |
0f113f3e | 152 | } |
7e1b7485 RS |
153 | # endif |
154 | /* DH parameters */ | |
155 | if (num && !g) | |
156 | g = 2; | |
0f113f3e MC |
157 | |
158 | if (num) { | |
159 | ||
160 | BN_GENCB *cb; | |
161 | cb = BN_GENCB_new(); | |
96487cdd | 162 | if (cb == NULL) { |
0f113f3e MC |
163 | ERR_print_errors(bio_err); |
164 | goto end; | |
165 | } | |
166 | ||
167 | BN_GENCB_set(cb, dh_cb, bio_err); | |
7e1b7485 | 168 | if (!app_RAND_load_file(NULL, 1) && inrand == NULL) { |
0f113f3e MC |
169 | BIO_printf(bio_err, |
170 | "warning, not much extra random data, consider using the -rand option\n"); | |
171 | } | |
172 | if (inrand != NULL) | |
173 | BIO_printf(bio_err, "%ld semi-random bytes loaded\n", | |
174 | app_RAND_load_files(inrand)); | |
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); | |
96487cdd | 182 | if (dsa == NULL |
0f113f3e MC |
183 | || !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, |
184 | cb)) { | |
d6407083 | 185 | DSA_free(dsa); |
0f113f3e MC |
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"); | |
96487cdd | 206 | if (dh == NULL || !DH_generate_parameters_ex(dh, num, g, cb)) { |
0f113f3e MC |
207 | BN_GENCB_free(cb); |
208 | ERR_print_errors(bio_err); | |
209 | goto end; | |
210 | } | |
211 | } | |
212 | ||
213 | BN_GENCB_free(cb); | |
7e1b7485 | 214 | app_RAND_write_file(NULL); |
0f113f3e MC |
215 | } else { |
216 | ||
bdd58d98 | 217 | in = bio_open_default(infile, 'r', informat); |
7e1b7485 | 218 | if (in == NULL) |
0f113f3e | 219 | goto end; |
0f113f3e | 220 | |
0f113f3e MC |
221 | # ifndef OPENSSL_NO_DSA |
222 | if (dsaparam) { | |
223 | DSA *dsa; | |
224 | ||
225 | if (informat == FORMAT_ASN1) | |
226 | dsa = d2i_DSAparams_bio(in, NULL); | |
227 | else /* informat == FORMAT_PEM */ | |
228 | dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL); | |
229 | ||
230 | if (dsa == NULL) { | |
231 | BIO_printf(bio_err, "unable to load DSA parameters\n"); | |
232 | ERR_print_errors(bio_err); | |
233 | goto end; | |
234 | } | |
235 | ||
236 | dh = DSA_dup_DH(dsa); | |
237 | DSA_free(dsa); | |
238 | if (dh == NULL) { | |
239 | ERR_print_errors(bio_err); | |
240 | goto end; | |
241 | } | |
242 | } else | |
243 | # endif | |
244 | { | |
18d20b5e MC |
245 | if (informat == FORMAT_ASN1) { |
246 | /* | |
247 | * We have no PEM header to determine what type of DH params it | |
248 | * is. We'll just try both. | |
249 | */ | |
0f113f3e | 250 | dh = d2i_DHparams_bio(in, NULL); |
18d20b5e MC |
251 | /* BIO_reset() returns 0 for success for file BIOs only!!! */ |
252 | if (dh == NULL && BIO_reset(in) == 0) | |
253 | dh = d2i_DHxparams_bio(in, NULL); | |
254 | } else { | |
255 | /* informat == FORMAT_PEM */ | |
0f113f3e | 256 | dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL); |
18d20b5e | 257 | } |
0f113f3e MC |
258 | |
259 | if (dh == NULL) { | |
260 | BIO_printf(bio_err, "unable to load DH parameters\n"); | |
261 | ERR_print_errors(bio_err); | |
262 | goto end; | |
263 | } | |
264 | } | |
265 | ||
266 | /* dh != NULL */ | |
267 | } | |
268 | ||
bdd58d98 | 269 | out = bio_open_default(outfile, 'w', outformat); |
7e1b7485 | 270 | if (out == NULL) |
0f113f3e | 271 | goto end; |
0f113f3e MC |
272 | |
273 | if (text) { | |
274 | DHparams_print(out, dh); | |
275 | } | |
276 | ||
277 | if (check) { | |
278 | if (!DH_check(dh, &i)) { | |
279 | ERR_print_errors(bio_err); | |
280 | goto end; | |
281 | } | |
282 | if (i & DH_CHECK_P_NOT_PRIME) | |
eeb21772 | 283 | BIO_printf(bio_err, "WARNING: p value is not prime\n"); |
0f113f3e | 284 | if (i & DH_CHECK_P_NOT_SAFE_PRIME) |
eeb21772 MC |
285 | BIO_printf(bio_err, "WARNING: p value is not a safe prime\n"); |
286 | if (i & DH_CHECK_Q_NOT_PRIME) | |
287 | BIO_printf(bio_err, "WARNING: q value is not a prime\n"); | |
288 | if (i & DH_CHECK_INVALID_Q_VALUE) | |
289 | BIO_printf(bio_err, "WARNING: q value is invalid\n"); | |
290 | if (i & DH_CHECK_INVALID_J_VALUE) | |
291 | BIO_printf(bio_err, "WARNING: j value is invalid\n"); | |
0f113f3e | 292 | if (i & DH_UNABLE_TO_CHECK_GENERATOR) |
eeb21772 MC |
293 | BIO_printf(bio_err, |
294 | "WARNING: unable to check the generator value\n"); | |
0f113f3e | 295 | if (i & DH_NOT_SUITABLE_GENERATOR) |
eeb21772 | 296 | BIO_printf(bio_err, "WARNING: the g value is not a generator\n"); |
0f113f3e | 297 | if (i == 0) |
eeb21772 MC |
298 | BIO_printf(bio_err, "DH parameters appear to be ok.\n"); |
299 | if (num != 0 && i != 0) { | |
300 | /* | |
301 | * We have generated parameters but DH_check() indicates they are | |
302 | * invalid! This should never happen! | |
303 | */ | |
304 | BIO_printf(bio_err, "ERROR: Invalid parameters generated\n"); | |
305 | goto end; | |
306 | } | |
0f113f3e MC |
307 | } |
308 | if (C) { | |
309 | unsigned char *data; | |
7e1b7485 | 310 | int len, bits; |
2ac6115d | 311 | const BIGNUM *pbn, *gbn; |
0f113f3e | 312 | |
0aeddcfa MC |
313 | len = DH_size(dh); |
314 | bits = DH_bits(dh); | |
315 | DH_get0_pqg(dh, &pbn, NULL, &gbn); | |
68dc6824 | 316 | data = app_malloc(len, "print a BN"); |
7e1b7485 RS |
317 | BIO_printf(out, "#ifndef HEADER_DH_H\n" |
318 | "# include <openssl/dh.h>\n" | |
319 | "#endif\n" | |
320 | "\n"); | |
321 | BIO_printf(out, "DH *get_dh%d()\n{\n", bits); | |
0aeddcfa MC |
322 | print_bignum_var(out, pbn, "dhp", bits, data); |
323 | print_bignum_var(out, gbn, "dhg", bits, data); | |
324 | BIO_printf(out, " DH *dh = DH_new();\n" | |
325 | " BIGNUM *dhp_bn, *dhg_bn;\n" | |
7e1b7485 RS |
326 | "\n" |
327 | " if (dh == NULL)\n" | |
328 | " return NULL;\n"); | |
0aeddcfa MC |
329 | BIO_printf(out, " dhp_bn = BN_bin2bn(dhp_%d, sizeof (dhp_%d), NULL);\n", |
330 | bits, bits); | |
331 | BIO_printf(out, " dhg_bn = BN_bin2bn(dhg_%d, sizeof (dhg_%d), NULL);\n", | |
332 | bits, bits); | |
333 | BIO_printf(out, " if (dhp_bn == NULL || dhg_bn == NULL\n" | |
334 | " || !DH_set0_pqg(dh, dhp_bn, NULL, dhg_bn)) {\n" | |
7e1b7485 | 335 | " DH_free(dh);\n" |
0aeddcfa MC |
336 | " BN_free(dhp_bn);\n" |
337 | " BN_free(dhg_bn);\n" | |
7e1b7485 RS |
338 | " return NULL;\n" |
339 | " }\n"); | |
0aeddcfa | 340 | if (DH_get_length(dh) > 0) |
7e1b7485 | 341 | BIO_printf(out, |
0aeddcfa MC |
342 | " if (!DH_set_length(dh, %ld)) {\n" |
343 | " DH_free(dh);\n" | |
344 | " }\n", DH_get_length(dh)); | |
7e1b7485 | 345 | BIO_printf(out, " return dh;\n}\n"); |
0f113f3e MC |
346 | OPENSSL_free(data); |
347 | } | |
348 | ||
349 | if (!noout) { | |
2ac6115d | 350 | const BIGNUM *q; |
0aeddcfa | 351 | DH_get0_pqg(dh, NULL, &q, NULL); |
18d20b5e MC |
352 | if (outformat == FORMAT_ASN1) { |
353 | if (q != NULL) | |
354 | i = i2d_DHxparams_bio(out, dh); | |
355 | else | |
356 | i = i2d_DHparams_bio(out, dh); | |
2234212c | 357 | } else if (q != NULL) { |
7e1b7485 | 358 | i = PEM_write_bio_DHxparams(out, dh); |
2234212c | 359 | } else { |
7e1b7485 | 360 | i = PEM_write_bio_DHparams(out, dh); |
2234212c | 361 | } |
0f113f3e MC |
362 | if (!i) { |
363 | BIO_printf(bio_err, "unable to write DH parameters\n"); | |
364 | ERR_print_errors(bio_err); | |
365 | goto end; | |
366 | } | |
367 | } | |
368 | ret = 0; | |
369 | end: | |
ca3a82c3 RS |
370 | BIO_free(in); |
371 | BIO_free_all(out); | |
d6407083 | 372 | DH_free(dh); |
dd1abd44 | 373 | release_engine(e); |
7e1b7485 | 374 | return (ret); |
0f113f3e | 375 | } |
09483c58 | 376 | |
6d23cf97 | 377 | static int dh_cb(int p, int n, BN_GENCB *cb) |
0f113f3e MC |
378 | { |
379 | char c = '*'; | |
380 | ||
381 | if (p == 0) | |
382 | c = '.'; | |
383 | if (p == 1) | |
384 | c = '+'; | |
385 | if (p == 2) | |
386 | c = '*'; | |
387 | if (p == 3) | |
388 | c = '\n'; | |
389 | BIO_write(BN_GENCB_get_arg(cb), &c, 1); | |
390 | (void)BIO_flush(BN_GENCB_get_arg(cb)); | |
391 | return 1; | |
392 | } | |
09483c58 | 393 | #endif |