lib/hcrypto/test_dh.c

   1 /*
   2 * Copyright (c) 2007, Novell, Inc.
   3 * Author: Matthias Koenig <mkoenig@suse.de>
   4 *
   5 * All rights reserved.
   6 *
   7 * Redistribution and use in source and binary forms, with or without
   8 * modification, are permitted provided that the following conditions are met:
   9 *
  10 * * Redistributions of source code must retain the above copyright notice, this
  11 *   list of conditions and the following disclaimer.
  12 *
  13 * * Redistributions in binary form must reproduce the above copyright notice,
  14 *   this list of conditions and the following disclaimer in the documentation
  15 *   and/or other materials provided with the distribution.
  16 *
  17 * * Neither the name of the Novell nor the names of its contributors may be used
  18 *   to endorse or promote products derived from this software without specific
  19 *   prior written permission.
  20 *
  21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31 * POSSIBILITY OF SUCH DAMAGE.
  32 */
  33
  34 /* openssl diffie-hellman test code
  35  * works with openssl-0.9.8e
  36  * primes with 3072 and 6144 bits as specified in RFC3526
  37  * fail since openssl-0.9.8f
  38  */
  39
  40 #include <config.h>
  41
  42 #include <stdio.h>
  43 #include <ctype.h>
  44
  45 #include <roken.h>
  46 #include <getarg.h>
  47
  48 #include <dh.h>
  49
  50 /*
  51  *
  52  */
  53
  54 static int version_flag;
  55 static int help_flag;
  56 static int verbose;
  57
  58 static struct getargs args[] = {
  59     { "verbose",        0,      arg_flag,       &verbose,
  60       "verbose output from tests", NULL },
  61     { "version",        0,      arg_flag,       &version_flag,
  62       "print version", NULL },
  63     { "help",           0,      arg_flag,       &help_flag,
  64       NULL,     NULL }
  65 };
  66
  67 /*
  68  *
  69  */
  70
  71 #define OAKLEY_PRIME_MODP768                                    \
  72     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  73     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  74     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
  75     "E485B576 625E7EC6 F44C42E9 A63A3620 FFFFFFFF FFFFFFFF"
  76
  77 #define OAKLEY_PRIME_MODP1024                                   \
  78     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  79     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  80     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
  81     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
  82     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE65381"     \
  83     "FFFFFFFF FFFFFFFF"
  84
  85 #define OAKLEY_PRIME_MODP1536                                   \
  86     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  87     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  88     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
  89     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
  90     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
  91     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
  92     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
  93     "670C354E 4ABC9804 F1746C08 CA237327 FFFFFFFF FFFFFFFF"
  94
  95 /* RFC 3526 */
  96 #define OAKLEY_PRIME_MODP2048                                   \
  97     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  98     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  99     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 100     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 101     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 102     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 103     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 104     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 105     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 106     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 107     "15728E5A 8AACAA68 FFFFFFFF FFFFFFFF"
 108
 109 #define OAKLEY_PRIME_MODP3072                                   \
 110     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 111     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 112     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 113     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 114     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 115     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 116     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 117     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 118     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 119     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 120     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 121     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 122     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 123     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 124     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 125     "43DB5BFC E0FD108E 4B82D120 A93AD2CA FFFFFFFF FFFFFFFF"
 126
 127 #define OAKLEY_PRIME_MODP4096                                   \
 128     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 129     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 130     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 131     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 132     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 133     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 134     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 135     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 136     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 137     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 138     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 139     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 140     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 141     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 142     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 143     "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"     \
 144     "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"     \
 145     "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"     \
 146     "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"     \
 147     "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"     \
 148     "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34063199"     \
 149     "FFFFFFFF FFFFFFFF"
 150
 151 #define OAKLEY_PRIME_MODP6144                                   \
 152     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 153     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 154     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 155     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 156     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 157     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 158     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 159     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 160     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 161     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 162     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 163     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 164     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 165     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 166     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 167     "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"     \
 168     "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"     \
 169     "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"     \
 170     "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"     \
 171     "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"     \
 172     "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492"     \
 173     "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD"     \
 174     "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831"     \
 175     "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B"     \
 176     "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF"     \
 177     "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6"     \
 178     "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3"     \
 179     "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA"     \
 180     "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328"     \
 181     "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C"     \
 182     "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE"     \
 183     "12BF2D5B 0B7474D6 E694F91E 6DCC4024 FFFFFFFF FFFFFFFF"
 184
 185 #define OAKLEY_PRIME_MODP8192                                   \
 186     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 187     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 188     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 189     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 190     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 191     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 192     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 193     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 194     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 195     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 196     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 197     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 198     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 199     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 200     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 201     "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"     \
 202     "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"     \
 203     "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"     \
 204     "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"     \
 205     "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"     \
 206     "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492"     \
 207     "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD"     \
 208     "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831"     \
 209     "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B"     \
 210     "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF"     \
 211     "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6"     \
 212     "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3"     \
 213     "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA"     \
 214     "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328"     \
 215     "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C"     \
 216     "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE"     \
 217     "12BF2D5B 0B7474D6 E694F91E 6DBE1159 74A3926F 12FEE5E4"     \
 218     "38777CB6 A932DF8C D8BEC4D0 73B931BA 3BC832B6 8D9DD300"     \
 219     "741FA7BF 8AFC47ED 2576F693 6BA42466 3AAB639C 5AE4F568"     \
 220     "3423B474 2BF1C978 238F16CB E39D652D E3FDB8BE FC848AD9"     \
 221     "22222E04 A4037C07 13EB57A8 1A23F0C7 3473FC64 6CEA306B"     \
 222     "4BCBC886 2F8385DD FA9D4B7F A2C087E8 79683303 ED5BDD3A"     \
 223     "062B3CF5 B3A278A6 6D2A13F8 3F44F82D DF310EE0 74AB6A36"     \
 224     "4597E899 A0255DC1 64F31CC5 0846851D F9AB4819 5DED7EA1"     \
 225     "B1D510BD 7EE74D73 FAF36BC3 1ECFA268 359046F4 EB879F92"     \
 226     "4009438B 481C6CD7 889A002E D5EE382B C9190DA6 FC026E47"     \
 227     "9558E447 5677E9AA 9E3050E2 765694DF C81F56E8 80B96E71"     \
 228     "60C980DD 98EDD3DF FFFFFFFF FFFFFFFF"
 229
 230 struct prime {
 231     char *name;
 232     char *value;
 233 } primes[] = {
 234     { "modp768", OAKLEY_PRIME_MODP768 },
 235     { "modp1024", OAKLEY_PRIME_MODP1024 },
 236     { "modp1536", OAKLEY_PRIME_MODP1536 },
 237     { "modp2048", OAKLEY_PRIME_MODP2048 },
 238     { "modp3072", OAKLEY_PRIME_MODP3072 },
 239     { "modp4096", OAKLEY_PRIME_MODP4096 },
 240     { "modp6144", OAKLEY_PRIME_MODP6144 },
 241     { "modp8192", OAKLEY_PRIME_MODP8192 },
 242     { NULL, NULL }
 243 };
 244
 245 /*
 246  * exchange a string based "base" to a value.
 247  *
 248  */
 249 static char *
 250 str2val(const char *str, int base, size_t *len)
 251 {
 252     int f;
 253     size_t i;
 254     char *dst;
 255     char *rp;
 256     const char *p;
 257     char b[3];
 258
 259     i = 0;
 260     for (p = str; *p != '\0'; p++) {
 261         if (isxdigit((int)*p))
 262             i++;
 263         else if (isspace((int)*p))
 264             ;
 265         else
 266             return NULL;
 267     }
 268     if (i == 0 || (i % 2) != 0)
 269         return NULL;
 270     i /= 2;
 271
 272     if ((dst = malloc(i)) == NULL)
 273         return NULL;
 274
 275     i = 0;
 276     f = 0;
 277     for (rp = dst, p = str; *p != '\0'; p++) {
 278         if (isxdigit((int)*p)) {
 279             if (!f) {
 280                 b[0] = *p;
 281                 f = 1;
 282             } else {
 283                 b[1] = *p;
 284                 b[2] = '\0';
 285                 *rp++ = (char)strtol(b, NULL, base);
 286                 i++;
 287                 f = 0;
 288             }
 289         }
 290     }
 291
 292     *len = i;
 293
 294     return(dst);
 295 }
 296
 297 static void set_prime(BIGNUM *p, char *str)
 298 {
 299     size_t len = 0;
 300     unsigned char *prime;
 301
 302     prime = (unsigned char *)str2val(str, 16, &len);
 303     if (prime == NULL)
 304         errx(1, "failed to parse %s", str);
 305     BN_bin2bn(prime, len, p);
 306 }
 307
 308 static void set_generator(BIGNUM *g)
 309 {
 310     BN_set_word(g, 2);
 311 }
 312
 313 static void print_secret(unsigned char *sec, size_t len)
 314 {
 315     size_t i;
 316
 317     for (i = 0; i < len; ++i)
 318         printf("%x", sec[i]);
 319
 320     printf("\n");
 321 }
 322
 323 static int check_prime(struct prime *pr)
 324 {
 325     DH *dh1, *dh2;
 326     BIGNUM *p, *g;
 327     unsigned char *sec1, *sec2;
 328     size_t size;
 329     int ret;
 330
 331     if (verbose)
 332         printf("Testing %s\n", pr->name);
 333
 334     p = BN_new();
 335     g = BN_new();
 336     dh1 = DH_new();
 337     dh2 = DH_new();
 338
 339     /* 1. set shared parameter */
 340     set_prime(p, pr->value);
 341     set_generator(g);
 342     dh1->p = BN_dup(p);
 343     dh1->g = BN_dup(g);
 344     dh2->p = BN_dup(p);
 345     dh2->g = BN_dup(g);
 346
 347     /* 2. set keys */
 348     ret = DH_generate_key(dh1);
 349     if (ret == 0) {
 350         fprintf(stderr, "DH_generate_key\n");
 351         exit(EXIT_FAILURE);
 352     }
 353     ret = DH_generate_key(dh2);
 354     if (ret == 0) {
 355         fprintf(stderr, "DH_generate_key\n");
 356         exit(EXIT_FAILURE);
 357     }
 358
 359     /* 3. compute shared secret */
 360     size = DH_size(dh1);
 361     if (size != DH_size(dh2)) {
 362         fprintf(stderr, "size does not match!\n");
 363         exit(EXIT_FAILURE);
 364     }
 365     sec1 = malloc(size);
 366     sec2 = malloc(size);
 367     if (!sec1 || !sec2) {
 368         perror("malloc");
 369         exit(EXIT_FAILURE);
 370     }
 371     ret = DH_compute_key(sec1, dh2->pub_key, dh1);
 372     if (ret == -1) {
 373         fprintf(stderr, "DH_compute_key");
 374         exit(EXIT_FAILURE);
 375     }
 376     ret = DH_compute_key(sec2, dh1->pub_key, dh2);
 377     if (ret == -1) {
 378         fprintf(stderr, "DH_compute_key");
 379         exit(EXIT_FAILURE);
 380     }
 381
 382     /* 4. compare shared secret */
 383     if (verbose) {
 384         printf("shared secret 1\n");
 385         print_secret(sec1, size);
 386         printf("shared secret 2\n");
 387         print_secret(sec2, size);
 388     }
 389
 390     if (memcmp(sec1, sec2, size) == 0)
 391         ret = 1;
 392     else
 393         ret = 0;
 394
 395     free(sec2);
 396     free(sec1);
 397     DH_free(dh2);
 398     DH_free(dh1);
 399     BN_free(g);
 400     BN_free(p);
 401
 402     return ret;
 403 }
 404
 405 /*
 406  *
 407  */
 408
 409 static void
 410 usage (int ret)
 411 {
 412     arg_printusage (args,
 413                     sizeof(args)/sizeof(*args),
 414                     NULL,
 415                     "");
 416     exit (ret);
 417 }
 418
 419 int
 420 main(int argc, char **argv)
 421 {
 422     int idx = 0;
 423
 424     setprogname(argv[0]);
 425
 426     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &idx))
 427         usage(1);
 428
 429     if (help_flag)
 430         usage(0);
 431
 432     if(version_flag){
 433         print_version(NULL);
 434         exit(0);
 435     }
 436
 437     argc -= idx;
 438     argv += idx;
 439
 440     {
 441         struct prime *p = primes;
 442
 443         for (; p->name; ++p)
 444             if (check_prime(p))
 445                 printf("%s: shared secret OK\n", p->name);
 446             else
 447                 printf("%s: shared secret FAILURE\n", p->name);
 448
 449         return 0;
 450     }
 451
 452     return 0;
 453 }