[331] | 1 | /*
|
---|
| 2 | * Copyright 1995-2016 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
|
---|
| 12 | NON_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 <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
|
---|
| 30 |
|
---|
| 31 | # define DEFBITS 2048
|
---|
| 32 |
|
---|
| 33 | static int dh_cb(int p, int n, BN_GENCB *cb);
|
---|
| 34 |
|
---|
| 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 |
|
---|
| 42 | OPTIONS dhparam_options[] = {
|
---|
| 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"},
|
---|
| 52 | {"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
|
---|
| 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"},
|
---|
| 58 | # ifndef OPENSSL_NO_DSA
|
---|
| 59 | {"dsaparam", OPT_DSAPARAM, '-',
|
---|
| 60 | "Read or generate DSA parameters, convert to DH"},
|
---|
| 61 | # endif
|
---|
| 62 | # ifndef OPENSSL_NO_ENGINE
|
---|
| 63 | {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
|
---|
| 64 | # endif
|
---|
| 65 | {NULL}
|
---|
| 66 | };
|
---|
| 67 |
|
---|
| 68 | int dhparam_main(int argc, char **argv)
|
---|
| 69 | {
|
---|
| 70 | BIO *in = NULL, *out = NULL;
|
---|
| 71 | DH *dh = NULL;
|
---|
| 72 | char *infile = NULL, *outfile = NULL, *prog, *inrand = NULL;
|
---|
| 73 | ENGINE *e = NULL;
|
---|
| 74 | #ifndef OPENSSL_NO_DSA
|
---|
| 75 | int dsaparam = 0;
|
---|
| 76 | #endif
|
---|
| 77 | int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
|
---|
| 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:
|
---|
| 108 | e = setup_engine(opt_arg(), 0);
|
---|
| 109 | break;
|
---|
| 110 | case OPT_CHECK:
|
---|
| 111 | check = 1;
|
---|
| 112 | break;
|
---|
| 113 | case OPT_TEXT:
|
---|
| 114 | text = 1;
|
---|
| 115 | break;
|
---|
| 116 | case OPT_DSAPARAM:
|
---|
| 117 | #ifndef OPENSSL_NO_DSA
|
---|
| 118 | dsaparam = 1;
|
---|
| 119 | #endif
|
---|
| 120 | break;
|
---|
| 121 | case OPT_C:
|
---|
| 122 | C = 1;
|
---|
| 123 | break;
|
---|
| 124 | case OPT_2:
|
---|
| 125 | g = 2;
|
---|
| 126 | break;
|
---|
| 127 | case OPT_5:
|
---|
| 128 | g = 5;
|
---|
| 129 | break;
|
---|
| 130 | case OPT_NOOUT:
|
---|
| 131 | noout = 1;
|
---|
| 132 | break;
|
---|
| 133 | case OPT_RAND:
|
---|
| 134 | inrand = opt_arg();
|
---|
| 135 | break;
|
---|
| 136 | }
|
---|
| 137 | }
|
---|
| 138 | argc = opt_num_rest();
|
---|
| 139 | argv = opt_rest();
|
---|
| 140 |
|
---|
| 141 | if (argv[0] && (!opt_int(argv[0], &num) || num <= 0))
|
---|
| 142 | goto end;
|
---|
| 143 |
|
---|
| 144 | if (g && !num)
|
---|
| 145 | num = DEFBITS;
|
---|
| 146 |
|
---|
| 147 | # ifndef OPENSSL_NO_DSA
|
---|
| 148 | if (dsaparam && g) {
|
---|
| 149 | BIO_printf(bio_err,
|
---|
| 150 | "generator may not be chosen for DSA parameters\n");
|
---|
| 151 | goto end;
|
---|
| 152 | }
|
---|
| 153 | # endif
|
---|
| 154 | /* DH parameters */
|
---|
| 155 | if (num && !g)
|
---|
| 156 | g = 2;
|
---|
| 157 |
|
---|
| 158 | if (num) {
|
---|
| 159 |
|
---|
| 160 | BN_GENCB *cb;
|
---|
| 161 | cb = BN_GENCB_new();
|
---|
| 162 | if (cb == NULL) {
|
---|
| 163 | ERR_print_errors(bio_err);
|
---|
| 164 | goto end;
|
---|
| 165 | }
|
---|
| 166 |
|
---|
| 167 | BN_GENCB_set(cb, dh_cb, bio_err);
|
---|
| 168 | if (!app_RAND_load_file(NULL, 1) && inrand == NULL) {
|
---|
| 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);
|
---|
| 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 | app_RAND_write_file(NULL);
|
---|
| 215 | } else {
|
---|
| 216 |
|
---|
| 217 | in = bio_open_default(infile, 'r', informat);
|
---|
| 218 | if (in == NULL)
|
---|
| 219 | goto end;
|
---|
| 220 |
|
---|
| 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 | {
|
---|
| 245 | if (informat == FORMAT_ASN1)
|
---|
| 246 | dh = d2i_DHparams_bio(in, NULL);
|
---|
| 247 | else /* informat == FORMAT_PEM */
|
---|
| 248 | dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
|
---|
| 249 |
|
---|
| 250 | if (dh == NULL) {
|
---|
| 251 | BIO_printf(bio_err, "unable to load DH parameters\n");
|
---|
| 252 | ERR_print_errors(bio_err);
|
---|
| 253 | goto end;
|
---|
| 254 | }
|
---|
| 255 | }
|
---|
| 256 |
|
---|
| 257 | /* dh != NULL */
|
---|
| 258 | }
|
---|
| 259 |
|
---|
| 260 | out = bio_open_default(outfile, 'w', outformat);
|
---|
| 261 | if (out == NULL)
|
---|
| 262 | goto end;
|
---|
| 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 | BIO_printf(out, "#ifndef HEADER_DH_H\n"
|
---|
| 309 | "# include <openssl/dh.h>\n"
|
---|
| 310 | "#endif\n"
|
---|
| 311 | "\n");
|
---|
| 312 | BIO_printf(out, "DH *get_dh%d()\n{\n", bits);
|
---|
| 313 | print_bignum_var(out, pbn, "dhp", bits, data);
|
---|
| 314 | print_bignum_var(out, gbn, "dhg", bits, data);
|
---|
| 315 | BIO_printf(out, " DH *dh = DH_new();\n"
|
---|
| 316 | " BIGNUM *dhp_bn, *dhg_bn;\n"
|
---|
| 317 | "\n"
|
---|
| 318 | " if (dh == NULL)\n"
|
---|
| 319 | " return NULL;\n");
|
---|
| 320 | BIO_printf(out, " dhp_bn = BN_bin2bn(dhp_%d, sizeof (dhp_%d), NULL);\n",
|
---|
| 321 | bits, bits);
|
---|
| 322 | BIO_printf(out, " dhg_bn = BN_bin2bn(dhg_%d, sizeof (dhg_%d), NULL);\n",
|
---|
| 323 | bits, bits);
|
---|
| 324 | BIO_printf(out, " if (dhp_bn == NULL || dhg_bn == NULL\n"
|
---|
| 325 | " || !DH_set0_pqg(dh, dhp_bn, NULL, dhg_bn)) {\n"
|
---|
| 326 | " DH_free(dh);\n"
|
---|
| 327 | " BN_free(dhp_bn);\n"
|
---|
| 328 | " BN_free(dhg_bn);\n"
|
---|
| 329 | " return NULL;\n"
|
---|
| 330 | " }\n");
|
---|
| 331 | if (DH_get_length(dh) > 0)
|
---|
| 332 | BIO_printf(out,
|
---|
| 333 | " if (!DH_set_length(dh, %ld)) {\n"
|
---|
| 334 | " DH_free(dh);\n"
|
---|
| 335 | " }\n", DH_get_length(dh));
|
---|
| 336 | BIO_printf(out, " return dh;\n}\n");
|
---|
| 337 | OPENSSL_free(data);
|
---|
| 338 | }
|
---|
| 339 |
|
---|
| 340 | if (!noout) {
|
---|
| 341 | const BIGNUM *q;
|
---|
| 342 | DH_get0_pqg(dh, NULL, &q, NULL);
|
---|
| 343 | if (outformat == FORMAT_ASN1)
|
---|
| 344 | i = i2d_DHparams_bio(out, dh);
|
---|
| 345 | else if (q != NULL)
|
---|
| 346 | i = PEM_write_bio_DHxparams(out, dh);
|
---|
| 347 | else
|
---|
| 348 | i = PEM_write_bio_DHparams(out, dh);
|
---|
| 349 | if (!i) {
|
---|
| 350 | BIO_printf(bio_err, "unable to write DH parameters\n");
|
---|
| 351 | ERR_print_errors(bio_err);
|
---|
| 352 | goto end;
|
---|
| 353 | }
|
---|
| 354 | }
|
---|
| 355 | ret = 0;
|
---|
| 356 | end:
|
---|
| 357 | BIO_free(in);
|
---|
| 358 | BIO_free_all(out);
|
---|
| 359 | DH_free(dh);
|
---|
| 360 | release_engine(e);
|
---|
| 361 | return (ret);
|
---|
| 362 | }
|
---|
| 363 |
|
---|
| 364 | static int dh_cb(int p, int n, BN_GENCB *cb)
|
---|
| 365 | {
|
---|
| 366 | char c = '*';
|
---|
| 367 |
|
---|
| 368 | if (p == 0)
|
---|
| 369 | c = '.';
|
---|
| 370 | if (p == 1)
|
---|
| 371 | c = '+';
|
---|
| 372 | if (p == 2)
|
---|
| 373 | c = '*';
|
---|
| 374 | if (p == 3)
|
---|
| 375 | c = '\n';
|
---|
| 376 | BIO_write(BN_GENCB_get_arg(cb), &c, 1);
|
---|
| 377 | (void)BIO_flush(BN_GENCB_get_arg(cb));
|
---|
| 378 | return 1;
|
---|
| 379 | }
|
---|
| 380 | #endif
|
---|