crypto/dist/heimdal/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 #ifdef HAVE_CONFIG_H
  41 #include <config.h>
  42 #endif
  43
  44 #ifdef RCSID
  45 __RCSID("$Heimdal: test_rsa.c 20466 2007-04-20 08:29:05Z lha $"
  46         "$NetBSD$");
  47 #endif
  48
  49 #include <stdio.h>
  50 #include <ctype.h>
  51
  52 #include <roken.h>
  53 #include <getarg.h>
  54
  55 #include <dh.h>
  56
  57 /*
  58  *
  59  */
  60
  61 static int version_flag;
  62 static int help_flag;
  63 static int verbose;
  64
  65 static struct getargs args[] = {
  66     { "verbose",        0,      arg_flag,       &verbose,
  67       "verbose output from tests", NULL },
  68     { "version",        0,      arg_flag,       &version_flag,
  69       "print version", NULL },
  70     { "help",           0,      arg_flag,       &help_flag,
  71       NULL,     NULL }
  72 };
  73
  74 /*
  75  *
  76  */
  77
  78 #define OAKLEY_PRIME_MODP768                                    \
  79     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  80     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  81     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
  82     "E485B576 625E7EC6 F44C42E9 A63A3620 FFFFFFFF FFFFFFFF"
  83
  84 #define OAKLEY_PRIME_MODP1024                                   \
  85     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  86     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  87     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
  88     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
  89     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE65381"     \
  90     "FFFFFFFF FFFFFFFF"
  91
  92 #define OAKLEY_PRIME_MODP1536                                   \
  93     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  94     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  95     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
  96     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
  97     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
  98     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
  99     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 100     "670C354E 4ABC9804 F1746C08 CA237327 FFFFFFFF FFFFFFFF"
 101
 102 /* RFC 3526 */
 103 #define OAKLEY_PRIME_MODP2048                                   \
 104     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 105     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 106     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 107     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 108     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 109     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 110     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 111     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 112     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 113     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 114     "15728E5A 8AACAA68 FFFFFFFF FFFFFFFF"
 115
 116 #define OAKLEY_PRIME_MODP3072                                   \
 117     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 118     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 119     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 120     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 121     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 122     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 123     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 124     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 125     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 126     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 127     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 128     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 129     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 130     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 131     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 132     "43DB5BFC E0FD108E 4B82D120 A93AD2CA FFFFFFFF FFFFFFFF"
 133
 134 #define OAKLEY_PRIME_MODP4096                                   \
 135     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 136     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 137     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 138     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 139     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 140     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 141     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 142     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 143     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 144     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 145     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 146     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 147     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 148     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 149     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 150     "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"     \
 151     "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"     \
 152     "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"     \
 153     "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"     \
 154     "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"     \
 155     "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34063199"     \
 156     "FFFFFFFF FFFFFFFF"
 157
 158 #define OAKLEY_PRIME_MODP6144                                   \
 159     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 160     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 161     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 162     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 163     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 164     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 165     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 166     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 167     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 168     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 169     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 170     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 171     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 172     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 173     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 174     "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"     \
 175     "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"     \
 176     "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"     \
 177     "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"     \
 178     "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"     \
 179     "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492"     \
 180     "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD"     \
 181     "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831"     \
 182     "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B"     \
 183     "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF"     \
 184     "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6"     \
 185     "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3"     \
 186     "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA"     \
 187     "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328"     \
 188     "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C"     \
 189     "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE"     \
 190     "12BF2D5B 0B7474D6 E694F91E 6DCC4024 FFFFFFFF FFFFFFFF"
 191
 192 #define OAKLEY_PRIME_MODP8192                                   \
 193     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 194     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 195     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 196     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 197     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 198     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 199     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 200     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 201     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 202     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 203     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 204     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 205     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 206     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 207     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 208     "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"     \
 209     "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"     \
 210     "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"     \
 211     "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"     \
 212     "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"     \
 213     "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492"     \
 214     "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD"     \
 215     "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831"     \
 216     "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B"     \
 217     "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF"     \
 218     "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6"     \
 219     "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3"     \
 220     "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA"     \
 221     "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328"     \
 222     "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C"     \
 223     "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE"     \
 224     "12BF2D5B 0B7474D6 E694F91E 6DBE1159 74A3926F 12FEE5E4"     \
 225     "38777CB6 A932DF8C D8BEC4D0 73B931BA 3BC832B6 8D9DD300"     \
 226     "741FA7BF 8AFC47ED 2576F693 6BA42466 3AAB639C 5AE4F568"     \
 227     "3423B474 2BF1C978 238F16CB E39D652D E3FDB8BE FC848AD9"     \
 228     "22222E04 A4037C07 13EB57A8 1A23F0C7 3473FC64 6CEA306B"     \
 229     "4BCBC886 2F8385DD FA9D4B7F A2C087E8 79683303 ED5BDD3A"     \
 230     "062B3CF5 B3A278A6 6D2A13F8 3F44F82D DF310EE0 74AB6A36"     \
 231     "4597E899 A0255DC1 64F31CC5 0846851D F9AB4819 5DED7EA1"     \
 232     "B1D510BD 7EE74D73 FAF36BC3 1ECFA268 359046F4 EB879F92"     \
 233     "4009438B 481C6CD7 889A002E D5EE382B C9190DA6 FC026E47"     \
 234     "9558E447 5677E9AA 9E3050E2 765694DF C81F56E8 80B96E71"     \
 235     "60C980DD 98EDD3DF FFFFFFFF FFFFFFFF"
 236
 237 struct prime {
 238     char *name;
 239     char *value;
 240 } primes[] = {
 241     { "modp768", OAKLEY_PRIME_MODP768 },
 242     { "modp1024", OAKLEY_PRIME_MODP1024 },
 243     { "modp1536", OAKLEY_PRIME_MODP1536 },
 244     { "modp2048", OAKLEY_PRIME_MODP2048 },
 245     { "modp3072", OAKLEY_PRIME_MODP3072 },
 246     { "modp4096", OAKLEY_PRIME_MODP4096 },
 247     { "modp6144", OAKLEY_PRIME_MODP6144 },
 248     { "modp8192", OAKLEY_PRIME_MODP8192 },
 249     { NULL, NULL }
 250 };
 251
 252 /*
 253  * exchange a string based "base" to a value.
 254  *
 255  */
 256 static char *
 257 str2val(const char *str, int base, size_t *len)
 258 {
 259     int f;
 260     size_t i;
 261     char *dst;
 262     char *rp;
 263     const char *p;
 264     char b[3];
 265
 266     i = 0;
 267     for (p = str; *p != '\0'; p++) {
 268         if (isxdigit((int)*p))
 269             i++;
 270         else if (isspace((int)*p))
 271             ;
 272         else
 273             return NULL;
 274     }
 275     if (i == 0 || (i % 2) != 0)
 276         return NULL;
 277     i /= 2;
 278
 279     if ((dst = malloc(i)) == NULL)
 280         return NULL;
 281
 282     i = 0;
 283     f = 0;
 284     for (rp = dst, p = str; *p != '\0'; p++) {
 285         if (isxdigit((int)*p)) {
 286             if (!f) {
 287                 b[0] = *p;
 288                 f = 1;
 289             } else {
 290                 b[1] = *p;
 291                 b[2] = '\0';
 292                 *rp++ = (char)strtol(b, NULL, base);
 293                 i++;
 294                 f = 0;
 295             }
 296         }
 297     }
 298
 299     *len = i;
 300
 301     return(dst);
 302 }
 303
 304 static void set_prime(BIGNUM *p, char *str)
 305 {
 306     size_t len = 0;
 307     unsigned char *prime;
 308
 309     prime = (unsigned char *)str2val(str, 16, &len);
 310     if (prime == NULL)
 311         errx(1, "failed to parse %s", str);
 312     BN_bin2bn(prime, len, p);
 313 }
 314
 315 static void set_generator(BIGNUM *g)
 316 {
 317     BN_set_word(g, 2);
 318 }
 319
 320 static void print_secret(unsigned char *sec, size_t len)
 321 {
 322     size_t i;
 323
 324     for (i = 0; i < len; ++i)
 325         printf("%x", sec[i]);
 326
 327     printf("\n");
 328 }
 329
 330 static int check_prime(struct prime *pr)
 331 {
 332     DH *dh1, *dh2;
 333     BIGNUM *p, *g;
 334     unsigned char *sec1, *sec2;
 335     size_t size;
 336     int ret;
 337
 338     if (verbose)
 339         printf("Testing %s\n", pr->name);
 340
 341     p = BN_new();
 342     g = BN_new();
 343     dh1 = DH_new();
 344     dh2 = DH_new();
 345
 346     /* 1. set shared parameter */
 347     set_prime(p, pr->value);
 348     set_generator(g);
 349     dh1->p = BN_dup(p);
 350     dh1->g = BN_dup(g);
 351     dh2->p = BN_dup(p);
 352     dh2->g = BN_dup(g);
 353
 354     /* 2. set keys */
 355     ret = DH_generate_key(dh1);
 356     if (ret == 0) {
 357         fprintf(stderr, "DH_generate_key\n");
 358         exit(EXIT_FAILURE);
 359     }
 360     ret = DH_generate_key(dh2);
 361     if (ret == 0) {
 362         fprintf(stderr, "DH_generate_key\n");
 363         exit(EXIT_FAILURE);
 364     }
 365
 366     /* 3. compute shared secret */
 367     size = DH_size(dh1);
 368     if (size != DH_size(dh2)) {
 369         fprintf(stderr, "size does not match!\n");
 370         exit(EXIT_FAILURE);
 371     }
 372     sec1 = malloc(size);
 373     sec2 = malloc(size);
 374     if (!sec1 || !sec2) {
 375         perror("malloc");
 376         exit(EXIT_FAILURE);
 377     }
 378     ret = DH_compute_key(sec1, dh2->pub_key, dh1);
 379     if (ret == -1) {
 380         fprintf(stderr, "DH_compute_key");
 381         exit(EXIT_FAILURE);
 382     }
 383     ret = DH_compute_key(sec2, dh1->pub_key, dh2);
 384     if (ret == -1) {
 385         fprintf(stderr, "DH_compute_key");
 386         exit(EXIT_FAILURE);
 387     }
 388
 389     /* 4. compare shared secret */
 390     if (verbose) {
 391         printf("shared secret 1\n");
 392         print_secret(sec1, size);
 393         printf("shared secret 2\n");
 394         print_secret(sec2, size);
 395     }
 396
 397     if (memcmp(sec1, sec2, size) == 0)
 398         ret = 1;
 399     else
 400         ret = 0;
 401
 402     free(sec2);
 403     free(sec1);
 404     DH_free(dh2);
 405     DH_free(dh1);
 406     BN_free(g);
 407     BN_free(p);
 408
 409     return ret;
 410 }
 411
 412 /*
 413  *
 414  */
 415
 416 static void
 417 usage (int ret)
 418 {
 419     arg_printusage (args,
 420                     sizeof(args)/sizeof(*args),
 421                     NULL,
 422                     "");
 423     exit (ret);
 424 }
 425
 426 int
 427 main(int argc, char **argv)
 428 {
 429     int idx = 0;
 430
 431     setprogname(argv[0]);
 432
 433     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &idx))
 434         usage(1);
 435
 436     if (help_flag)
 437         usage(0);
 438
 439     if(version_flag){
 440         print_version(NULL);
 441         exit(0);
 442     }
 443
 444     argc -= idx;
 445     argv += idx;
 446
 447     {
 448         struct prime *p = primes;
 449
 450         for (; p->name; ++p)
 451             if (check_prime(p))
 452                 printf("%s: shared secret OK\n", p->name);
 453             else
 454                 printf("%s: shared secret FAILURE\n", p->name);
 455
 456         return 0;
 457     }
 458
 459     return 0;
 460 }