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 #include <evp.h>
  50
  51 /*
  52  *
  53  */
  54
  55 static char *id_string;
  56 static int verbose;
  57 static int version_flag;
  58 static int help_flag;
  59
  60 static struct getargs args[] = {
  61     { "id",     0,              arg_string,     &id_string,
  62       "type of ENGINE", NULL },
  63     { "verbose",        0,      arg_flag,       &verbose,
  64       "verbose output from tests", NULL },
  65     { "version",        0,      arg_flag,       &version_flag,
  66       "print version", NULL },
  67     { "help",           0,      arg_flag,       &help_flag,
  68       NULL,     NULL }
  69 };
  70
  71 /*
  72  *
  73  */
  74
  75 #define OAKLEY_PRIME_MODP768                                    \
  76     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  77     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  78     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
  79     "E485B576 625E7EC6 F44C42E9 A63A3620 FFFFFFFF FFFFFFFF"
  80
  81 #define OAKLEY_PRIME_MODP1024                                   \
  82     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  83     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  84     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
  85     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
  86     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE65381"     \
  87     "FFFFFFFF FFFFFFFF"
  88
  89 #define OAKLEY_PRIME_MODP1536                                   \
  90     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
  91     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
  92     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
  93     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
  94     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
  95     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
  96     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
  97     "670C354E 4ABC9804 F1746C08 CA237327 FFFFFFFF FFFFFFFF"
  98
  99 /* RFC 3526 */
 100 #define OAKLEY_PRIME_MODP2048                                   \
 101     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 102     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 103     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 104     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 105     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 106     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 107     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 108     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 109     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 110     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 111     "15728E5A 8AACAA68 FFFFFFFF FFFFFFFF"
 112
 113 #define OAKLEY_PRIME_MODP3072                                   \
 114     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 115     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 116     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 117     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 118     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 119     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 120     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 121     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 122     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 123     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 124     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 125     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 126     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 127     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 128     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 129     "43DB5BFC E0FD108E 4B82D120 A93AD2CA FFFFFFFF FFFFFFFF"
 130
 131 #define OAKLEY_PRIME_MODP4096                                   \
 132     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 133     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 134     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 135     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 136     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 137     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 138     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 139     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 140     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 141     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 142     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 143     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 144     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 145     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 146     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 147     "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"     \
 148     "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"     \
 149     "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"     \
 150     "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"     \
 151     "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"     \
 152     "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34063199"     \
 153     "FFFFFFFF FFFFFFFF"
 154
 155 #define OAKLEY_PRIME_MODP6144                                   \
 156     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 157     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 158     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 159     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 160     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 161     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 162     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 163     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 164     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 165     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 166     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 167     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 168     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 169     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 170     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 171     "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"     \
 172     "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"     \
 173     "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"     \
 174     "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"     \
 175     "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"     \
 176     "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492"     \
 177     "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD"     \
 178     "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831"     \
 179     "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B"     \
 180     "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF"     \
 181     "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6"     \
 182     "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3"     \
 183     "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA"     \
 184     "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328"     \
 185     "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C"     \
 186     "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE"     \
 187     "12BF2D5B 0B7474D6 E694F91E 6DCC4024 FFFFFFFF FFFFFFFF"
 188
 189 #define OAKLEY_PRIME_MODP8192                                   \
 190     "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"     \
 191     "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"     \
 192     "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"     \
 193     "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"     \
 194     "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"     \
 195     "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"     \
 196     "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"     \
 197     "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"     \
 198     "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"     \
 199     "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"     \
 200     "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"     \
 201     "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"     \
 202     "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"     \
 203     "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"     \
 204     "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"     \
 205     "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"     \
 206     "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"     \
 207     "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"     \
 208     "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"     \
 209     "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"     \
 210     "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492"     \
 211     "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD"     \
 212     "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831"     \
 213     "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B"     \
 214     "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF"     \
 215     "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6"     \
 216     "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3"     \
 217     "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA"     \
 218     "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328"     \
 219     "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C"     \
 220     "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE"     \
 221     "12BF2D5B 0B7474D6 E694F91E 6DBE1159 74A3926F 12FEE5E4"     \
 222     "38777CB6 A932DF8C D8BEC4D0 73B931BA 3BC832B6 8D9DD300"     \
 223     "741FA7BF 8AFC47ED 2576F693 6BA42466 3AAB639C 5AE4F568"     \
 224     "3423B474 2BF1C978 238F16CB E39D652D E3FDB8BE FC848AD9"     \
 225     "22222E04 A4037C07 13EB57A8 1A23F0C7 3473FC64 6CEA306B"     \
 226     "4BCBC886 2F8385DD FA9D4B7F A2C087E8 79683303 ED5BDD3A"     \
 227     "062B3CF5 B3A278A6 6D2A13F8 3F44F82D DF310EE0 74AB6A36"     \
 228     "4597E899 A0255DC1 64F31CC5 0846851D F9AB4819 5DED7EA1"     \
 229     "B1D510BD 7EE74D73 FAF36BC3 1ECFA268 359046F4 EB879F92"     \
 230     "4009438B 481C6CD7 889A002E D5EE382B C9190DA6 FC026E47"     \
 231     "9558E447 5677E9AA 9E3050E2 765694DF C81F56E8 80B96E71"     \
 232     "60C980DD 98EDD3DF FFFFFFFF FFFFFFFF"
 233
 234 struct prime {
 235     char *name;
 236     char *value;
 237 } primes[] = {
 238     { "modp768", OAKLEY_PRIME_MODP768 },
 239     { "modp1024", OAKLEY_PRIME_MODP1024 },
 240     { "modp1536", OAKLEY_PRIME_MODP1536 },
 241     { "modp2048", OAKLEY_PRIME_MODP2048 },
 242     { "modp3072", OAKLEY_PRIME_MODP3072 },
 243     { "modp4096", OAKLEY_PRIME_MODP4096 },
 244     { "modp6144", OAKLEY_PRIME_MODP6144 },
 245     { "modp8192", OAKLEY_PRIME_MODP8192 },
 246     { NULL, NULL }
 247 };
 248
 249 /*
 250  * exchange a string based "base" to a value.
 251  *
 252  */
 253 static char *
 254 str2val(const char *str, int base, size_t *len)
 255 {
 256     int f;
 257     size_t i;
 258     char *dst;
 259     char *rp;
 260     const char *p;
 261     char b[3];
 262
 263     i = 0;
 264     for (p = str; *p != '\0'; p++) {
 265         if (isxdigit((int)*p))
 266             i++;
 267         else if (isspace((int)*p))
 268             ;
 269         else
 270             return NULL;
 271     }
 272     if (i == 0 || (i % 2) != 0)
 273         return NULL;
 274     i /= 2;
 275
 276     if ((dst = malloc(i)) == NULL)
 277         return NULL;
 278
 279     i = 0;
 280     f = 0;
 281     for (rp = dst, p = str; *p != '\0'; p++) {
 282         if (isxdigit((int)*p)) {
 283             if (!f) {
 284                 b[0] = *p;
 285                 f = 1;
 286             } else {
 287                 b[1] = *p;
 288                 b[2] = '\0';
 289                 *rp++ = (char)strtol(b, NULL, base);
 290                 i++;
 291                 f = 0;
 292             }
 293         }
 294     }
 295
 296     *len = i;
 297
 298     return(dst);
 299 }
 300
 301 static void set_prime(BIGNUM *p, char *str)
 302 {
 303     size_t len = 0;
 304     unsigned char *prime;
 305
 306     prime = (unsigned char *)str2val(str, 16, &len);
 307     if (prime == NULL)
 308         errx(1, "failed to parse %s", str);
 309     BN_bin2bn(prime, len, p);
 310 }
 311
 312 static void set_generator(BIGNUM *g)
 313 {
 314     BN_set_word(g, 2);
 315 }
 316
 317 static void print_secret(unsigned char *sec, size_t len)
 318 {
 319     size_t i;
 320
 321     for (i = 0; i < len; ++i)
 322         printf("%x", sec[i]);
 323
 324     printf("\n");
 325 }
 326
 327 static int check_prime(ENGINE *engine, struct prime *pr)
 328 {
 329     DH *dh1, *dh2;
 330     BIGNUM *p, *g;
 331     unsigned char *sec1, *sec2;
 332     size_t size;
 333     int ret;
 334
 335     if (verbose)
 336         printf("Testing %s\n", pr->name);
 337
 338     p = BN_new();
 339     g = BN_new();
 340     dh1 = DH_new_method(engine);
 341     dh2 = DH_new_method(engine);
 342
 343     /* 1. set shared parameter */
 344     set_prime(p, pr->value);
 345     set_generator(g);
 346     dh1->p = BN_dup(p);
 347     dh1->g = BN_dup(g);
 348     dh2->p = BN_dup(p);
 349     dh2->g = BN_dup(g);
 350
 351     /* 2. set keys */
 352     ret = DH_generate_key(dh1);
 353     if (ret == 0) {
 354         fprintf(stderr, "DH_generate_key\n");
 355         exit(EXIT_FAILURE);
 356     }
 357     ret = DH_generate_key(dh2);
 358     if (ret == 0) {
 359         fprintf(stderr, "DH_generate_key\n");
 360         exit(EXIT_FAILURE);
 361     }
 362
 363     /* 3. compute shared secret */
 364     size = DH_size(dh1);
 365     if (size != DH_size(dh2)) {
 366         fprintf(stderr, "size does not match!\n");
 367         exit(EXIT_FAILURE);
 368     }
 369     sec1 = malloc(size);
 370     sec2 = malloc(size);
 371     if (!sec1 || !sec2) {
 372         perror("malloc");
 373         exit(EXIT_FAILURE);
 374     }
 375     ret = DH_compute_key(sec1, dh2->pub_key, dh1);
 376     if (ret == -1) {
 377         fprintf(stderr, "DH_compute_key");
 378         exit(EXIT_FAILURE);
 379     }
 380     ret = DH_compute_key(sec2, dh1->pub_key, dh2);
 381     if (ret == -1) {
 382         fprintf(stderr, "DH_compute_key");
 383         exit(EXIT_FAILURE);
 384     }
 385
 386     /* 4. compare shared secret */
 387     if (verbose) {
 388         printf("shared secret 1\n");
 389         print_secret(sec1, size);
 390         printf("shared secret 2\n");
 391         print_secret(sec2, size);
 392     }
 393
 394     if (memcmp(sec1, sec2, size) == 0)
 395         ret = 1;
 396     else
 397         ret = 0;
 398
 399     free(sec2);
 400     free(sec1);
 401     DH_free(dh2);
 402     DH_free(dh1);
 403     BN_free(g);
 404     BN_free(p);
 405
 406     return ret;
 407 }
 408
 409 /*
 410  *
 411  */
 412
 413 static void
 414 usage (int ret)
 415 {
 416     arg_printusage (args,
 417                     sizeof(args)/sizeof(*args),
 418                     NULL,
 419                     "");
 420     exit (ret);
 421 }
 422
 423 int
 424 main(int argc, char **argv)
 425 {
 426     ENGINE *engine = NULL;
 427     int idx = 0;
 428
 429     setprogname(argv[0]);
 430
 431     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &idx))
 432         usage(1);
 433
 434     if (help_flag)
 435         usage(0);
 436
 437     if(version_flag){
 438         print_version(NULL);
 439         exit(0);
 440     }
 441
 442     argc -= idx;
 443     argv += idx;
 444
 445     OpenSSL_add_all_algorithms();
 446 #ifdef OPENSSL
 447     ENGINE_load_openssl();
 448 #endif
 449     ENGINE_load_builtin_engines();
 450
 451     if (id_string) {
 452         engine = ENGINE_by_id(id_string);
 453         if (engine == NULL)
 454             engine = ENGINE_by_dso(id_string, id_string);
 455     } else {
 456         engine = ENGINE_by_id("builtin");
 457     }
 458     if (engine == NULL)
 459         errx(1, "ENGINE_by_dso failed");
 460
 461     printf("dh %s\n", ENGINE_get_DH(engine)->name);
 462
 463     {
 464         struct prime *p = primes;
 465
 466         for (; p->name; ++p)
 467             if (check_prime(engine, p))
 468                 printf("%s: shared secret OK\n", p->name);
 469             else
 470                 printf("%s: shared secret FAILURE\n", p->name);
 471
 472         return 0;
 473     }
 474
 475     return 0;
 476 }